@font-face { src: url(https://fonts-cdn.bureau.ru/1.18/bureausans-regular.woff2) format('woff2'), url(https://fonts-cdn.bureau.ru/1.18/bureausans-regular.woff) format('woff'); font-family: 'Bureausans'; font-weight: normal; font-style: normal; } @font-face { src: url(https://fonts-cdn.bureau.ru/1.18/bureausans-bold.woff2) format('woff2'), url(https://fonts-cdn.bureau.ru/1.18/bureausans-bold.woff) format('woff'); font-family: 'Bureausans'; font-weight: bold; font-style: normal; } @font-face { src: url(https://fonts-cdn.bureau.ru/1.18/bureausans-regular_italic.woff2) format('woff2'), url(https://fonts-cdn.bureau.ru/1.18/bureausans-regular_italic.woff) format('woff'); font-family: 'Bureausans'; font-weight: normal; font-style: italic; } @font-face { src: url(https://fonts-cdn.bureau.ru/1.18/bureausans-light.woff2) format('woff2'), url(https://fonts-cdn.bureau.ru/1.18/bureausans-light.woff) format('woff'); font-family: 'Bureausans'; font-weight: 100; font-style: normal; } @font-face { src: url(https://fonts-cdn.bureau.ru/1.18/bureausans-light_italic.woff2) format('woff2'), url(https://fonts-cdn.bureau.ru/1.18/bureausans-light_italic.woff) format('woff'); font-family: 'Bureausans'; font-weight: 100; font-style: italic; } @font-face { src: url(https://fonts-cdn.bureau.ru/1.18/bureausans-allsmallcapitals.woff2) format('woff2'), url(https://fonts-cdn.bureau.ru/1.18/bureausans-allsmallcapitals.woff) format('woff'); font-family: 'Bureausans Small Capitals'; font-weight: normal; font-style: normal; } @font-face { src: url(https://fonts-cdn.bureau.ru/1.18/bureauserif-regular.woff2) format('woff2'), url(https://fonts-cdn.bureau.ru/1.18/bureauserif-regular.woff) format('woff'); font-family: 'Bureauserif'; font-weight: normal; font-style: normal; } @font-face { src: url(https://fonts-cdn.bureau.ru/1.18/bureauserif-italic.woff2) format('woff2'), url(https://fonts-cdn.bureau.ru/1.18/bureauserif-italic.woff) format('woff'); font-family: 'Bureauserif'; font-weight: normal; font-style: italic; } @font-face { src: url(https://fonts-cdn.bureau.ru/1.18/bureauserif-allsmallcapitals.woff2) format('woff2'), url(https://fonts-cdn.bureau.ru/1.18/bureauserif-allsmallcapitals.woff) format('woff'); font-family: 'Bureauserif Small Capitals'; font-weight: normal; font-style: normal; } @font-face { src: url(https://fonts-cdn.bureau.ru/1.18/bureauserif-swash.woff2) format('woff2'), url(https://fonts-cdn.bureau.ru/1.18/bureauserif-swash.woff) format('woff'); font-family: 'Bureauserif Swash'; font-weight: normal; font-style: normal; } /*! v. 2 */ /*! normalize.css v3.0.2 | MIT License | git.io/normalize */html{-ms-text-size-adjust:100%;-webkit-text-size-adjust:100%;font-family:sans-serif}body{margin:0}article,aside,details,figcaption,figure,footer,header,hgroup,main,menu,nav,section,summary{display:block}audio,canvas,progress,video{display:inline-block;vertical-align:baseline}audio:not([controls]){display:none;height:0}[hidden],template{display:none}a{background-color:transparent}a:active,a:hover{outline:0}abbr[title]{border-bottom:1px dotted}b,strong{font-weight:700}dfn{font-feature-settings:"kern" 1;font-style:italic}h1{font-size:2em;margin:.67em 0}mark{background:#ff0;color:#000}small{font-size:80%}sub,sup{font-size:75%;line-height:0;position:relative;vertical-align:baseline}sup{top:-.5em}sub{bottom:-.25em}img{border:0}svg:not(:root){overflow:hidden}figure{margin:1em 40px}hr{box-sizing:content-box;height:0}pre{overflow:auto}code,kbd,pre,samp{font-family:monospace,monospace;font-size:1em}button,input,optgroup,select,textarea{color:inherit;font:inherit;margin:0}button{overflow:visible}button,select{text-transform:none}button,html input[type=button],input[type=reset],input[type=submit]{-webkit-appearance:button;cursor:pointer}button[disabled],html input[disabled]{cursor:default}button::-moz-focus-inner,input::-moz-focus-inner{border:0;padding:0}input{line-height:normal}input[type=checkbox],input[type=radio]{box-sizing:border-box;padding:0}input[type=number]::-webkit-inner-spin-button,input[type=number]::-webkit-outer-spin-button{height:auto}input[type=search]{-webkit-appearance:textfield;box-sizing:content-box}input[type=search]::-webkit-search-cancel-button,input[type=search]::-webkit-search-decoration{-webkit-appearance:none}fieldset{border:1px solid #c0c0c0;margin:0 2px;padding:.35em .625em .75em}legend{border:0;padding:0}textarea{overflow:auto}optgroup{font-weight:700}table{border-collapse:collapse;border-spacing:0}td,th{padding:0}*,:after,:before{box-sizing:border-box}:root{--colsGutter:20px;--rowsGutter:40px;--colsGutterTransposed:40px;--rulerThickness:.5px;--rulerColor:#000;--rulerColorInverted:rgba(255,255,255,.5)}@media only screen and (-webkit-device-pixel-ratio:3){:root{--rulerThickness:.7px}}:root.no__halfPixel{--rulerThickness:1px;--rulerColor:rgba(0,0,0,.4)}@media only screen and (max-width:991px){:root{--topPagePaddingMobile:50px;--bottomPagePaddingMobile:60px;--leftPagePaddingMobile:4.1666666667vw}@media only screen and (min-aspect-ratio:1/1){@supports (padding:max(0px)){:root{--leftPagePaddingMobile:max(4.1666666667vw,calc(20px + env(safe-area-inset-left)))}}}}@font-face{font-family:Icons;src:url("data:application/octet-stream;base64,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") format("woff")}body,html{min-height:100%;width:100%}body{font-smoothing:subpixel-antialiased;background:#fff}body.is__resizing{pointer-events:none}body.is__resizing .coverbox{display:none}body.is__resizing .body-wrapper{opacity:0}i{font-feature-settings:"kern" 1}.body-wrapper{transition:opacity .4s ease}.book-wrapper{margin:calc(100lvh + 500px) 0}.book-wrapper.is__headless{margin:0}.book{font:18px/1.25 Bureausans,Arial,sans-serif;min-width:992px;visibility:hidden;width:100%}.book.is__ready{visibility:visible}@media only screen and (max-width:991px){.book{font-size:19px;line-height:1.263158;min-width:100vw}}h1{font-weight:400;line-height:1.025}@media only screen and (max-width:991px){h1{font-size:1.77em}}h2{font-size:1.6em;line-height:1}h3{font-size:1em}.inline-heading,h3{font-family:Bureausans,Arial,sans-serif;font-weight:700}.inline-heading{color:#000}.link,a,u{-webkit-text-decoration-skip:none;text-decoration-skip:none;box-shadow:none!important;color:inherit;text-decoration:underline;-webkit-text-decoration-color:rgba(0,0,0,.15);text-decoration-color:rgba(0,0,0,.15);-webkit-text-decoration-skip-ink:none;text-decoration-skip-ink:none;text-decoration-thickness:1px;text-underline-offset:.238lh}.is__invertColors .link,.is__invertColors a,.is__invertColors u{-webkit-text-decoration-color:rgba(255,255,255,.35);text-decoration-color:rgba(255,255,255,.35)}.spread.device__mobile a:active,.spread.device__mobile a:active .link,.spread:not(.device__mobile) a:hover,.spread:not(.device__mobile) a:hover .link{box-shadow:none!important;color:var(--linkColor,var(--keyColor,rgb(227,0,22)));text-decoration:underline;-webkit-text-decoration-color:var(--linkColor,var(--keyColor,rgb(227,0,22)));text-decoration-color:var(--linkColor,var(--keyColor,rgb(227,0,22)));text-decoration-thickness:1px;text-underline-offset:.238lh}.is__invertColors{--linkColor:#fff}.a-example{color:#0000fc;text-decoration:underline;-webkit-text-decoration-color:rgba(180,180,255,.5);text-decoration-color:rgba(180,180,255,.5);text-decoration-thickness:.5px;text-underline-offset:.25lh}.a-example:hover{color:var(--linkColor,var(--keyColor,rgb(227,0,22)));-webkit-text-decoration-color:var(--linkColor,var(--keyColor,rgb(227,0,22)));text-decoration-color:var(--linkColor,var(--keyColor,rgb(227,0,22)))}p{text-indent:1em}@media only screen and (max-width:991px){p{text-indent:.7em}}.heading-4 p,.swiss,.swiss p,p.p{text-indent:0}ul{list-style:none;padding-left:1em}ul.is__noIndent,ul.noIndent{padding-left:0}li{margin:0 0 .8em}li p{text-indent:0}li.is__lastChild,li:last-child,table{margin:0}table{border-collapse:separate;font-family:inherit;text-align:left;vertical-align:top;width:auto}table th,table thead{font-family:Bureausans,Arial,sans-serif;font-weight:700;-webkit-hyphens:none;hyphens:none}td,th{padding:5px 10px;vertical-align:top}td:first-child,th:first-child{padding-left:0!important}td:last-child,th:last-child{padding-right:0!important}tbody tr:first-child td,tbody tr:first-child th{padding-top:10px}tbody tr:last-child td,tbody tr:last-child th{padding-bottom:0}thead tr:first-child td,thead tr:first-child th{padding-top:5px}thead tr:last-child td,thead tr:last-child th{border-bottom:var(--tableRulerThickness,var(--rulerThickness,.5px)) solid var(--rulerColor,#000);padding-bottom:5px}.group td,.group th{font-family:Bureausans,Arial,sans-serif;font-weight:700;padding-bottom:0!important}.li td:first-child,.li th:first-child{padding-left:1em!important}.group+tr td,.group+tr th{padding-top:0}tr h3{margin-bottom:0;margin-top:0}tr.has__heading-3 td{padding-bottom:0;padding-top:calc(26px - .35em)}tr.has__heading-2 td{padding-bottom:10px;padding-top:calc(13px - .35em)}tr.cloneGroup-dt td,tr.cloneGroup-dt th{padding-bottom:0!important}tr.cloneGroup-dd td,tr.cloneGroup-dd th,tr.cloneGroup:first-child th{padding-top:0!important}td b{font-family:Bureausans,Arial,sans-serif;font-weight:700}tbody:first-child tr:first-child td,tbody:first-child tr:first-child th{padding-top:0}tbody:last-child tr:last-child td,tbody:last-child tr:last-child th,tfoot:last-child tr:last-child td,tfoot:last-child tr:last-child th{padding-bottom:0}thead tr td,thead tr th{padding-bottom:0;padding-top:0}thead tr:first-child td,thead tr:first-child th{padding-top:0}.is__tableClone tfoot th,tr+tr.cloneGroup th{padding-top:calc(35px - .51667em)}td>.textNode:first-child p,td>ul:first-child>li:first-child>.textNode:first-child p{margin-top:0}td>.textNode:last-child p,td>ul:last-child>li:last-child>.textNode:last-child p{margin-bottom:0}td .textNode{display:flex}td .textNode p{flex-basis:100%}.first,.first p,.p,.p p{text-indent:0}.swash,swash{font-family:"Bureauserif Swash",Arial,sans-serif}.small{font-size:14px;line-height:1.2}.smallcapitals{font-feature-settings:"smcp","c2sc"}.halfspace{display:inline-block;width:.09em}.highlighted,.is__highlighted{background:#f9f6e4;background:var(--highlightBackgroundColor,var(--secondaryKeyColor,var(--anchorBackgroundColor,var(--activeColor,#f9f6e4))));margin-left:-.3em;margin-right:-.3em;padding-left:.3em;padding-right:.3em}span.highlighted,span.is__highlighted{margin-left:-.1em;margin-right:-.1em;padding-left:.1em;padding-right:.1em}.js__vp{min-height:100vh;min-height:100lvh;position:fixed}.nobr{white-space:nowrap}#debugger{background:#000;color:#fff;font-size:20px;left:0;position:fixed;top:0;z-index:1000000}.debugline{background:blue;height:1px;width:100%;z-index:10000}.debugline,.soon{position:absolute}.soon{color:rgba(255,255,255,.3);font:3em Bureausans,Arial,sans-serif;left:50%;text-align:center;top:50%;transform:translate(-50%,-50%)}.spreadId{background:#fff;display:none;left:0;padding:.2em;pointer-events:auto;position:absolute;top:0;z-index:10000}body.is__spreadIdsVisible .spreadId{display:block}.global__drag{cursor:grabbing;-webkit-user-select:none;-moz-user-select:none;user-select:none}.device{display:none}@media only screen and (max-width:991px){.device.mobile{display:initial}}@media only screen and (max-aspect-ratio:1/1) and (max-width:991px){.device.verticalMobile{display:initial}}@media only screen and (min-width:992px){.device.laptop{display:initial}}@media only screen and (min-width:1400px){.device.desktop{display:initial}}iframe{width:100%}.is__visuallyHidden{visibility:hidden}.hyphenate,.hyphenate .textNode{-webkit-hyphens:auto;hyphens:auto}.spread-skippedText{color:#dcdcdc;font:3em Bureausans,Arial,sans-serif;left:50%;position:absolute;text-align:center;top:50%;transform:translate(-50%,-50%);white-space:nowrap}@media only screen and (max-width:991px){.spread-skippedText{font-size:1em}}.spread-skippedText:before{content:"πŸ”’";font-size:1.5em;left:50%;position:absolute;top:-50%;transform:translate(-50%,-50%)}body.is__debug .module{box-shadow:0 0 0 1px rgb(253,208,104)}body.is__debug .cols,body.is__debug .page,body.is__debug .rows,body.is__debug .spread,body.is__debug .spread-holder{box-shadow:none}body.is__debug .page-in:before{border-bottom:1px dashed rgba(252,192,51,.2);height:1.55em}body.is__debug .page-in:after,body.is__debug .page-in:before{content:"";left:0;pointer-events:none;position:absolute;right:0;top:0}body.is__debug .page-in:after{bottom:0;box-shadow:0 0 0 1px rgb(254,232,180);z-index:1}body.is__debug .is__mobileOverhead .page_top.page_top.page_top .page-in:after{top:auto}body.is__debug .undersite{display:none}body.is__debug .coverbox{pointer-events:auto}.error{padding-top:1.5em}.error .is__invalid{position:relative}.error .is__invalid:before{left:-2.7777777778vw}@media only screen and (max-width:991px){.error .is__invalid:before{left:-27.5277777778px}}.error .is__invalid:before{right:-2.7777777778vw}@media only screen and (max-width:991px){.error .is__invalid:before{right:-27.5277777778px}}.error .is__invalid:before{background:#fed030;bottom:0;content:"";position:absolute;top:0;z-index:0}.error code,.error pre{font-family:Monaco,Courier,monospace;font-size:14px;line-height:1;line-height:18px;margin:0;position:relative;white-space:pre-wrap}.avantitul-acknowledgment{margin-top:1.55em}@media only screen and (max-width:991px){.avantitul-acknowledgment{margin-top:0}}.avantitul-acknowledgment h2{font-feature-settings:"kern" 1;font-size:20px;font-style:italic;line-height:1.25;margin-top:-.45em;text-align:left}.avantitul-publisher-logo{background:url("data:image/svg+xml;charset=utf-8,%3Csvg xmlns='http://www.w3.org/2000/svg' width='158' height='33.904' viewBox='0 0 158 34'%3E%3Cpath d='M8.32 14.27a28.08 28.08 0 0 0-5.07.41v-11c4.44-.13 10-.17 14.17.11v-3H0C.1 3.1.2 6 .25 9.4v23.91h6.64c8.32 0 12.25-3.94 12.25-10.23 0-5.96-4.28-8.81-10.82-8.81ZM6.45 30.55H3.39c-.09-2.63-.14-5.7-.14-9v-4.19A26.41 26.41 0 0 1 7.73 17c5 0 8.27 1.82 8.27 6.2 0 4.89-3.35 7.35-9.55 7.35ZM119.87.15c-10.63 0-17.76 7.28-17.76 17.07S109.09 34 118.59 34c11.27 0 17.52-8.37 17.52-17.86A16 16 0 0 0 119.87.15ZM119 31c-8.07 0-13.48-5.46-13.48-13.78 0-8.66 5.61-14.12 13.38-14.12 9 0 13.83 6.05 13.83 13.48C132.71 25.63 127 31 119 31Zm39-13.93-8.41 8.37c-3.79 3.79-5.41 5.51-8.17 8.56l-2.61-2.17c2.85-2.61 4.48-4.18 8.42-8.12l6.68-6.64-6.68-6.64c-3.94-3.94-5.61-5.56-8.46-8.17l2.6-2.16c2.76 3.05 4.43 4.82 8.22 8.61ZM85.52.83h-7.43c.1 2.26.2 5.22.25 8.56v23.92h3.25c-.15-3.1-.25-7.23-.25-11.71v-1.53a21.22 21.22 0 0 0 2.56.15c8.76 0 13.43-4.33 13.43-10.63S91.82.83 85.52.83Zm-.84 16.58a24.7 24.7 0 0 1-3.35-.25V3.44h3.3c6.89 0 9.4 2.61 9.4 6.45 0 5.36-4.28 7.53-9.35 7.53ZM55 .15c-10 0-17 6.51-17.69 15.5h-8.52V.83h-3.25c.1 2.26.2 5.22.25 8.56v23.92H29c-.15-3.1-.25-7.23-.25-11.71v-3.3h8.49c.53 9.35 7.35 15.7 16.49 15.7C65 34 71.25 25.63 71.25 16.14A16 16 0 0 0 55 .15ZM54.13 31c-8.07 0-13.48-5.46-13.48-13.78C40.65 8.56 46.25 3.1 54 3.1c9 0 13.83 6.05 13.83 13.48C67.85 25.63 62.1 31 54.13 31Z'/%3E%3C/svg%3E") no-repeat;height:34px;width:158px}html[lang=en] .avantitul-publisher-logo{background-image:url("data:image/svg+xml;charset=utf-8,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 169.43 30'%3E%3Cpath d='M93.52 3.09ZM80.2 26.83c-.07-2.3-.12-5-.12-7.83v-3.41c3.43-.07 6.62-.07 10.48.07v-2.44H80.08V3.01c4-.11 8.74-.14 13.44.08V.65h-16.3c.09 2 .17 4.61.22 7.57v21.13h16.3v-2.83a130.82 130.82 0 0 1-13.54.31ZM62.83 17.7l9.87 11.65h-4l-9.83-12.43h-3.52V19c0 4 .09 7.61.22 10.35H52.7V8.21c0-3-.13-5.57-.22-7.57H59c5.57 0 10.35 2.31 10.35 7.7 0 4.5-2.67 7.29-7.72 8.22a10 10 0 0 1 1.2 1.14Zm-4.52-3.13c4.52 0 8.17-1.52 8.17-6.13 0-3.61-2.52-5.43-8.57-5.43h-2.56v11.56h2.96ZM154.91 0l-2.35 2c2.52 2.3 3.91 3.83 7.52 7.22l6.2 5.78-6.2 5.78c-3.61 3.39-5 4.91-7.52 7.22l2.35 2c2.43-2.7 4-4.22 7.26-7.61l7.26-7.39-7.26-7.39c-3.3-3.39-4.82-4.91-7.26-7.61Zm-10.52 8.22v8.3c0 8-3.13 10.74-8.43 10.74-5.87 0-8-3.22-8-11.13V9.22c0-2.87 0-6.26.09-8.57h-3c.17 2 .26 4.61.3 7.57v8.91c0 8.17 3 12.83 10.39 12.83 8.78-.04 11.26-6.04 11.26-13.13V9.22c0-2.87 0-6.26.09-8.57h-3c.17 2 .26 4.61.3 7.57ZM110.52.65c.4 2 8 21.53 10.7 28.7H118c-.81-2.47-2.1-6.2-3.49-10.14-2.62-.1-7.76 0-10.64 0-1.44 4.17-2.76 8-3.43 10.14h-3.22c2.87-7.13 9.43-25.48 10.48-28.7h2.82Zm3 15.92c-1.61-4.52-3.22-9-4.27-11.87H109c-1 2.79-2.6 7.33-4.18 11.87h8.7ZM42.34 8.22v8.3c0 8-3.13 10.74-8.43 10.74-5.87 0-8-3.22-8-11.13V9.22c0-2.87 0-6.26.09-8.57h-3c.17 2 .26 4.61.3 7.57v8.91c0 8.17 3 12.83 10.39 12.83C42.48 29.92 45 23.92 45 16.83V9.22c0-2.87 0-6.26.09-8.57H42c.22 2 .3 4.61.34 7.57ZM17.43 20.7c0 4.83-3.3 8.65-10.65 8.65H.22V8.22c0-3-.13-5.57-.22-7.57h6.43c5.48 0 9.78 1.52 9.78 7.09 0 3.39-2.87 6.13-5.13 6.26v.09a6.67 6.67 0 0 1 6.35 6.61ZM2.87 3v10h3.35c4.61 0 7.09-1.56 7.09-5.13S10.57 3 5.31 3H2.87Zm11.61 17.78c0-4-3-5.39-8-5.39H2.87V19c0 2.88 0 5.59.12 7.91h3.58c5.43.01 7.91-2.3 7.91-6.13Z'/%3E%3C/svg%3E");width:192px}.frontpage-main{margin-top:-.575em}.frontpage-main h1,.page .frontpage-main h1{margin:0}.frontpage-main h1:last-child,.page .frontpage-main h1:last-child{margin-bottom:-.44em}.frontpage-author{font-size:1.25em;line-height:1.2;margin-bottom:.32em}@media only screen and (max-width:991px){.frontpage-author{font-size:1em}}.frontpage-title{line-height:1.03333}.frontpage-title h1{font-size:3em}@media only screen and (max-width:991px){.frontpage-title h1{font-size:2em}}.spread:not(.is__invertColors) .frontpage-title{color:#fcc033;color:var(--keyColor,#fcc033)}.frontpage-year{margin-bottom:-.35em}.imprint-codes{font-feature-settings:"smcp","c2sc";font-size:.7em;line-height:1.143;margin-top:-3px}.imprint-author{font-family:Bureausans,Arial,sans-serif;font-weight:700}.imprint-aid{margin-left:-1.3888888889vw}@media only screen and (max-width:991px){.imprint-aid{margin-left:-13.7638888889px}}.imprint-aid{background:#fff;float:left;text-transform:uppercase}@media only screen and (max-width:991px){.imprint-aid{float:none;margin-left:0}}.imprint-description{font-size:14px;-webkit-hyphens:none;hyphens:none;line-height:1.2;margin:.4em 0}.imprint-description .textNode,.imprint-description p{margin:0}.imprint-description .textNode:first-child p{text-indent:0}.imprint-main-codes{float:right;font-size:14px;line-height:1.2;text-transform:uppercase}@media only screen and (max-width:991px){.imprint-main-codes{float:none}}.imprint-footer{display:flex;font-size:14px;justify-content:space-between;line-height:1.2;margin-bottom:-.35em}@media only screen and (max-width:991px){.imprint-footer{flex-direction:column}}.imprint-footer-isbn{white-space:nowrap}.imprint-footer-copy br{display:none}@media only screen and (max-width:1200px){.imprint-footer-copy br{display:inline}}.main-contents{font-feature-settings:"smcp","c2sc";margin-top:22px;padding-left:0}.main-contents .contentslink{margin-bottom:2.475em}.main-contents .contentslink:last-child{margin-bottom:0}@media only screen and (max-width:991px){.main-contents .contentslink{margin-bottom:27px}}.main-contents-page{margin-left:2em}.helper{display:none;font-family:Bureausans,Arial,sans-serif;font-size:17px;line-height:1.1em;width:75%}.spread.device__mobile .helper.device__mobile,body.is__desk .helper{display:block}.col-in.helper-col,.col.helper-col{align-items:center;flex-direction:row}.helper-box{margin-bottom:25px}.helper-arrows{line-height:1.7em;margin-right:1em;text-align:center}.helper-arrows .is__shifted{margin-left:6px}.helper-arrows .arrow-down,.helper-arrows .arrow-up{display:block;height:26px;width:19px}.heading-2.is__firstChild,.heading-2:first-child,.heading-3.is__firstChild,.heading-3:first-child,.textNode.is__firstChild,.textNode:first-child{margin-top:0}.heading-2.is__lastChild,.heading-2:last-child,.heading-3.is__lastChild,.heading-3:last-child,.textNode.is__lastChild,.textNode:last-child{margin-bottom:0!important}.heading-1{margin-bottom:69px}.heading-1:last-child{margin-bottom:0!important}@media only screen and (max-width:991px){.heading-1{margin-bottom:40px}}.heading-2{margin-bottom:18px}.heading-2+.heading-3{margin-top:16px}.heading-2:last-child{margin-bottom:0}.heading-3{margin-bottom:10px;margin-top:16px}.heading-3.is__firstChild,.heading-3:first-child{margin-top:0}.heading-3:last-child{margin-bottom:0}.heading-3+.example{margin-top:4px}.heading-3.has__caption,.heading-3.has__sidenote{margin-bottom:20px}.heading-3+.answer,.heading-3+.checkItem{margin-top:-9.5px}.media+.heading-3{margin-top:0}.textNode.has__example,.textNode.has__footnote.has__footnote{margin-bottom:40px}.textNode.has__caption,.textNode.has__sidenote{margin-bottom:20px}.textNode+.answer,.textNode+.checkItem{margin-top:-9.5px}.textNode+.module.is__fitToContent{margin-top:3.5px}.textNode.swiss{margin-top:11.5px}.anchor .textNode.swiss{margin-top:0}h1{margin-bottom:-9px;margin-top:-14.5px}h2{margin-bottom:-.1774em;margin-top:-2px}p{margin-bottom:-.35em;margin-top:-.16666667em}.label p{margin-bottom:-4.5px;margin-top:-5.5px}h3{margin-bottom:-7px;margin-top:-3px}ol,ul{margin:0 0 30px}ol:last-child,ul:last-child{margin-bottom:0}li{margin-bottom:1.17em}li:last-child{margin-bottom:0}li .textNode{display:flex}li .textNode p{flex-basis:100%}.sidenote ol,.sidenote ul{margin:0 0 1.2em;padding-left:0}.sidenote ol:last-child,.sidenote ul:last-child{margin-bottom:0}.sidenote h3,.sidenote p{margin-bottom:-4.5px;margin-top:-3px}.sidenote li{margin-bottom:.8929em}.sidenote li:last-child{margin-bottom:0!important}.sidenote .textNode{margin-bottom:1.2em}.sidenote .textNode:last-child{margin-bottom:0!important}.sidenote .heading-3{margin-bottom:.535714286em}.sidenote .heading-3:last-child{margin-bottom:0!important}.caption ol,.caption ul{margin:0 0 1.2em;padding-left:0}.caption ol:last-child,.caption ul:last-child{margin-bottom:0}.caption h3,.caption p{margin-bottom:-4.5px;margin-top:-3px}.caption li{margin-bottom:.8929em}.caption li:last-child{margin-bottom:0!important}.caption .textNode{margin-bottom:1.2em}.caption .textNode:last-child{margin-bottom:0!important}.caption .heading-3{margin-bottom:.535714286em}.caption .heading-3:last-child{margin-bottom:0!important}.caption .anchor p{margin-bottom:-.35em!important;margin-top:-.475em!important}.contents.is__compact ul:not(:last-child){margin:0 0 1.2em}.contents.is__compact h3,.contents.is__compact p{margin-bottom:-4.5px;margin-top:-3px}.contents.is__compact li:not(:last-child){margin-bottom:.8929em}.contents.is__compact .textNode:not(:last-child){margin-bottom:1.2em}.contents.is__compact .heading-3:not(:last-child){margin-bottom:.535714286em}.caption .textNode+.heading-3,.caption ol+.heading-3,.caption ul+.heading-3,.contents.is__compact .textNode+.heading-3,.contents.is__compact ol+.heading-3,.contents.is__compact ul+.heading-3,.sidenote .textNode+.heading-3,.sidenote ol+.heading-3,.sidenote ul+.heading-3{margin-top:calc(30px - 1.2em)}.caption .heading-3+.heading-3,.contents.is__compact .heading-3+.heading-3,.sidenote .heading-3+.heading-3{margin-top:calc(30px - .53571em)}.example h3,.example p{margin-bottom:-.3054em!important;margin-top:-.2em!important}.example h3{margin-top:-.3873em}.example li{margin-bottom:.8em}.example li:last-child{margin-bottom:0}.example ul{margin-bottom:1.3924em}.example ul:last-child{margin-bottom:0}.example .textNode:not(:last-child){margin-bottom:1.0404em}.textNode+.example{margin-top:2px}.textNode+.example.is__heading{margin-top:12px}.anchor.has__example>.example{margin-top:11px}.anchor.has__example>.example.is__heading{margin-top:26.5px}.example.is__liftOut .label p,.example.is__liftOutXL .label p{margin-bottom:-4.5px;margin-top:-5.5px}.heading-3+.example.is__liftOutXXL{margin-top:10px}.swissText .heading-2{margin-bottom:27.5px;margin-top:19.5px}.swissText .heading-2:first-child{margin-top:0}.swissText .heading-3{margin-bottom:16.5px;margin-top:4.5px}.swissText .textNode{margin-bottom:28.5px}.swissText .textNode:last-child{margin-bottom:0}.swissText .textNode.swiss{margin-top:0}.swissText .textNode+ol,.swissText .textNode+ul{margin-top:-12px}.swissText .sidenote .textNode{margin-bottom:50px}@media only screen and (max-width:991px){.swissText .sidenote .textNode{margin-bottom:21.5px}}.swissText .sidenote .textNode:last-child{margin-bottom:0!important}.test .question .anchor:last-child{margin-bottom:0}.fakeSideNote .textNode{margin-top:.333333em!important}.fakeSideNote .textNode:first-child{margin-top:0!important}.tableNode{margin:40px 0}.tableNode table{margin-bottom:-.35em;margin-top:-.16666667em}.heading-1+.tableNode,.heading-2+.tableNode,.heading-3+.tableNode,.tableNode+.tableNode,.tableNode.row,.tableNode:first-child{margin-top:0}.textNode+.tableNode{margin-top:3.5px}.textNode+.tableNode.has__tableHead{margin-top:12px}.tableNode:last-child{margin-bottom:0}body.is__print .addspread,body.is__print .checkmark,body.is__print .editlink{display:none}html{font:18px/1.25 Bureausans,Arial,sans-serif}.book-helpers{bottom:0;display:none;height:80px;opacity:0;position:fixed;right:0;width:80px;z-index:10000}body.is__ready .book-helpers{opacity:1}@media only screen and (max-width:991px){body.is__desk .book-helpers{display:block}}@media only screen and (max-height:600px){body.is__desk .book-helpers{display:block}}.book.is__wrongratio+.book-helpers body.is__desk .book-helpers{display:block}body.is__mobile .book-helpers{display:none!important}.book-helpers:before{border-color:transparent rgba(0,0,0,.1) rgba(0,0,0,.1) transparent;border-style:solid;border-width:40px;bottom:0;content:"";position:absolute;right:0}.book-helper{animation:linepoint 1s linear infinite;background:#fff;color:#fff;display:none;font-weight:700;height:10px;position:absolute;text-align:center;width:20px}.book-helper:after,.book-helper:before{border:11px solid transparent;content:"";position:absolute;top:-6px}.book-helper:before{border-right-color:#fff;margin-right:-1px;right:100%}.book-helper:after{border-left-color:#fff;left:100%;margin-left:-1px}.book-helper_horiz{bottom:17px;right:16px}.book.is__wrongratio .book-helper_horiz{display:block}@media only screen and (max-height:600px){.book.is__wrongratio .book-helper_horiz{display:none}}.book.is__wrongratio.is__fullwidth+.book-helpers .book-helper_horiz{display:none}.book-helper_vert{bottom:21px;right:14px;transform:rotate(90deg)}.book-helper_diag{bottom:16px;right:12px;transform:rotate(45deg)}.book-helper_up{bottom:13px;right:18px;transform:rotate(90deg);width:13px}.book-helper_up:after{background:#fff;border:0;bottom:-10px;height:22px;width:1px}.book.is__wrongratio.is__fullwidth+.book-helpers .book-helper_up{display:block}@media only screen and (max-width:991px){.book-helper_horiz{display:block}@media only screen and (max-height:600px){.book-helper_horiz{display:none}}}@media only screen and (max-height:600px){.book-helper_vert{display:block}@media only screen and (max-width:991px){.book-helper_vert{display:none}}}@media only screen and (max-width:991px){@media only screen and (max-height:600px){.book-helper_diag{display:block}}}.font-checker{font-family:Bureausans,Arial,sans-serif;font-size:100px;opacity:0;position:fixed;z-index:-1}.font-checker:before{content:"mmm"}.font-checker.is__italic{font-style:italic}.font-checker.is__bold{font-weight:700}.font-checker.is__light{font-weight:100}.font-checker.is__smallcaps{font-feature-settings:"smcp","c2sc"}.font-checker.is__swash{font-family:"Bureauserif Swash",Arial,sans-serif}.font-checker.is__sans{font-family:Bureausans,Arial,sans-serif}.halfpixel-checker{border:.5px solid transparent;position:fixed;top:-1px;z-index:-1}.pageHelper{bottom:0;display:none;opacity:0;position:fixed;right:0;z-index:-1}.pageHelper .page.grid__proportional .page-in{padding-top:0}h1{font-size:48px;font-weight:700;line-height:1}.page h1{margin-left:-.67em;padding-left:.6em}h2{font-size:31px;font-weight:400;line-height:29px;margin-left:-.07em}.frontpage-title h1{padding-left:0}.anchor,p{text-indent:0}.textNode{margin-bottom:18px}ol{counter-reset:list;list-style:none;margin-left:.825em;padding-left:0}ol>li .textNode:first-child p{position:relative}ol>li .textNode:first-child p:before{content:counter(list) ".\00a0";counter-increment:list;position:absolute;right:100%}.textNode+ol,.textNode+ul{margin-top:-9px}.example .textNode+ol,.example .textNode+ul{margin-top:0}ol,ul{margin-bottom:18px}li{margin-bottom:13px}li .anchor.is__active{mix-blend-mode:multiply}blockquote{font-size:1.2em;margin:0;padding-right:1em}.pageNumber,blockquote{font-weight:100}.pageNumber p{margin-bottom:10px}.caption,.sidenote{font-weight:100}.spread.is__doubleUnderneath .page.is__vertical-tv .page-in:after{margin-left:-.3em;width:calc(100% + .6em)}.heading-4{margin-bottom:10px}.frontpage-author{font-size:18px;line-height:inherit;margin-bottom:20px}.frontpage-title h1{font-size:120px}@media only screen and (max-width:991px){.frontpage-title h1{font-size:48px}}.imprint-aid{margin-left:0;margin-right:.33em}.main-contents{font-feature-settings:normal}.imprint-description .textNode:not(:last-child){margin-bottom:1em}.imprint-description .textNode p{margin-bottom:-.35em;margin-top:-.16666667em}.textNode+.module.is__fitToContent{margin-top:0}.label p,h1{margin-top:-5px}.module{-webkit-font-smoothing:subpixel-antialiased;display:flex;flex:1;flex-flow:column;flex-shrink:0}.module.device{display:none}@media only screen and (max-width:991px){.module.device__mobile{display:flex}}@media only screen and (max-aspect-ratio:1/1) and (max-width:991px){.module.device__verticalMobile{display:flex}}@media only screen and (min-aspect-ratio:1/1) and (max-width:991px){.module.device__horizontalMobile{display:flex}}@media only screen and (min-width:992px){.module.device__laptop{display:flex}}@media only screen and (min-width:1400px){.module.device__desktop{display:flex}}.module.is__fitToContent{flex:initial}.module.is__fitToContent.is__firstChild,.module.is__fitToContent:first-child{margin-top:0}.module.is__fitToContent.is__foldable{flex:1;flex-shrink:0}.module.is__row .module.is__fitToContent,p+.module.is__fitToContent{margin-top:20px}.module.is__row .module.is__fitToContent.is__firstChild,.module.is__row .module.is__fitToContent:first-child{margin-top:0}.module.is__align-left{text-align:left}.module.is__align-right{text-align:right}.module.is__align-center{text-align:center}.module.is__align-middle{justify-content:center}.module.is__align-top{justify-content:flex-start}.module.is__align-bottom{justify-content:flex-end}.module.is__align-distribute{justify-content:space-between}.module.is__align-distribute>.labeledMediaWrapper{flex-grow:0}.module.is__align-self-left,.module.is__align-self-top{align-self:flex-start}.module.is__align-self-bottom,.module.is__align-self-right{align-self:flex-end}.module.is__align-self-center{align-self:center}.module.is__ghost{flex:0 0 0}@media only screen and (max-width:991px){.is__service .module.is__ghost{flex:1}}.module.is__noGutter>.module{margin:0}.module:not(.page).is__noMargins{margin-bottom:0!important;margin-top:0!important}.module.is__fullWidth{margin-top:20px;position:relative;width:222.2222222222%}.module.is__fullWidth.is__firstChild,.module.is__fullWidth:first-child{margin-top:0}.module.is__positionOrigin{position:relative}.module.is__animatedStyles.gutter__fTC,.module[style*=bottom].gutter__fTC,.module[style*=inset].gutter__fTC{margin-bottom:0}.module.is__bordered,.module.is__bordered .img{border:1px solid #ccc}@media (-webkit-min-device-pixel-ratio:1.5),(min-resolution:144dpi){.module.is__bordered,.module.is__bordered .img{border-width:.5px}.no__halfPixel .module.is__bordered,.no__halfPixel .module.is__bordered .img{border-color:rgba(204,204,204,.5);border-width:1px}@media only screen and (max-width:991px){.module.is__bordered,.module.is__bordered .img{border-color:rgba(204,204,204,.5);border-width:1px}}}.spread.is__invertColors .module.is__bordered,.spread.is__invertColors .module.is__bordered .img{border:1px solid rgba(255,255,255,.2)}.is__visible .module.is__hacky{transform:translateZ(0)}.module.is__strikedOut{position:relative}.module.is__strikedOut:after{background-image:url("data:image/svg+xml;charset=US-ASCII,%3Csvg%20xmlns%3D%22http%3A%2F%2Fwww.w3.org%2F2000%2Fsvg%22%3E%20%20%3Cdefs%3E%20%20%20%20%3Cstyle%3E%20%20%20%20%20%20.a%20%7B%20%20%20%20%20%20%20%20stroke%3A%20%23e30016%3B%20%20%20%20%20%20%20%20stroke-width%3A%200.33px%3B%20%20%20%20%20%20%7D%20%20%20%20%3C%2Fstyle%3E%20%20%3C%2Fdefs%3E%20%20%3Ctitle%3Etest%3C%2Ftitle%3E%20%20%3Cline%20class%3D%22a%22%20x1%3D%220%25%22%20y1%3D%220%25%22%20x2%3D%22100%25%22%20y2%3D%22100%25%22%2F%3E%3C%2Fsvg%3E");background-position:0 0;background-repeat:no-repeat;background-size:100% 100%;bottom:-5px;content:"";left:-5px;pointer-events:none;position:absolute;right:-5px;top:-5px}.module.is__boxed{background-color:#f3f5f4;color:#000;padding:21px 11px 40px!important}.module.is__boxed:not(:last-child){margin-bottom:40px}.module.is__fader.is__fader{opacity:0;pointer-events:none;transition:opacity .3s ease}.spread.is__loaded .module.is__fader.is__fader{will-change:opacity}.module.is__fader.is__fader.is__active{opacity:1;pointer-events:all}.spread.is__loaded .module.is__faderFirst.is__faderFirst{will-change:opacity}.module.is__switcherItem{background-color:#fff;bottom:0;left:0;padding:0;position:absolute;right:0;top:0}.module.is__switcherItem[data-switch-on="1"]{opacity:1}.module.is__switcherItem.is__bleedBackground,.module.is__switcherItem.is__fader{margin:-.0833333333rem -8.3333333333vw -.1666666667rem;padding:.0833333333rem 8.3333333333vw .1666666667rem}@media only screen and (max-width:991px){.module.is__switcherItem.is__bleedBackground,.module.is__switcherItem.is__fader{margin:-50px -4.1666666667vw -60px;padding:50px 4.1666666667vw 60px}.module.is__switcherItem.is__bleedBackground.is__lastChild,.module.is__switcherItem.is__bleedBackground:last-child,.module.is__switcherItem.is__fader.is__lastChild,.module.is__switcherItem.is__fader:last-child{margin-bottom:-60px}.example.is__liftOutXL+.module.is__switcherItem.is__bleedBackground.has__example,.example.is__liftOutXL+.module.is__switcherItem.is__fader.has__example{margin-top:-50px}}.is__invertColors .module.is__switcherItem{background-color:#000}.module.is__animatedStyles{animation-duration:.3s;animation-play-state:paused;animation-timing-function:linear}.module.is__3dContainer{perspective:1000px}.module.is__marginal{left:-2.7777777778vw}@media only screen and (max-width:991px){.module.is__marginal{left:-27.5277777778px}}.module.is__marginal{width:2.7777777778vw}@media only screen and (max-width:991px){.module.is__marginal{width:27.5277777778px}}.module.is__marginal{padding-left:.3472222222vw}@media only screen and (max-width:991px){.module.is__marginal{padding-left:3.4409722222px}}.module.is__marginal{padding-right:.3472222222vw}@media only screen and (max-width:991px){.module.is__marginal{padding-right:3.4409722222px}}.module.is__marginal{background:#fff;font-size:.6em;line-height:1.2em;margin-left:-1px;position:absolute;text-align:left}.anchor .module.is__marginal{margin-left:5px}.module.is__marginal .spread.is__noHeaderMoveUp.is__onTheTop,.module.is__marginal .spread.is__soon.is__onTheTop{margin-top:1.75em}.page_right .module.is__marginal{right:-2.7777777778vw}@media only screen and (max-width:991px){.page_right .module.is__marginal{right:-27.5277777778px}}.page_right .module.is__marginal{left:auto}.anchor .page_right .module.is__marginal{margin-right:5px}.module.is__marginal.is__align-self-left{left:-2.7777777778vw}@media only screen and (max-width:991px){.module.is__marginal.is__align-self-left{left:-27.5277777778px}}.module.is__marginal.is__align-self-left{right:auto}.module.is__marginal.is__align-self-right{right:-2.7777777778vw}@media only screen and (max-width:991px){.module.is__marginal.is__align-self-right{right:-27.5277777778px}}.module.is__marginal.is__align-self-right{left:auto;margin-left:0;margin-right:-1px}.module.is__marginal.is__align-self-top{margin-top:0;top:0}.module.is__marginal.is__align-self-bottom{bottom:0}.module.is__marginal.is__align-right{text-align:right}.module.is__marginal.caption{background:none}.module.is__marginal.caption .caption-text{background:#fff}.module.is__marginal a{padding:.25ex 0 0}.module.is__bottomMarginal{align-items:flex-end;display:flex;position:absolute;right:32px;top:calc(100% + .08333rem - .71667em - 16.8px);width:48px;z-index:30}.module.is__bottomMarginal,.module.is__compact{font-size:14px;line-height:1.2}.module.is__pixelated{image-rendering:optimizeSpeed;image-rendering:pixelated}a.module{box-shadow:none;text-decoration:none}.label{font-feature-settings:"smcp","c2sc";background-color:inherit;flex:initial;font-family:Bureausans,Arial,sans-serif;font-size:14px;font-weight:100;line-height:1.2;margin-bottom:6px;padding-bottom:3px;padding-top:1px;white-space:nowrap}.label.is__align-center{text-align:center}.module-spacer{position:relative}.module-holder{height:100%;position:absolute;width:100%}.disabled,.disabled.example,.is__disabled,.is__disabled.example{color:#000;opacity:.14}@media only screen and (min-aspect-ratio:1/1) and (max-width:991px){.module.is__fullWidthOnMobileHorizontal{min-width:calc(100vw - var(--leftPagePaddingMobile)*2)}.module.is__halfWidthOnMobileHorizontal{max-width:calc(50vw - var(--leftPagePaddingMobile) - 12px)}}.anchor{-webkit-tap-highlight-color:rgba(0,0,0,0);cursor:pointer;flex:initial;position:relative;touch-action:manipulation;transition:none;z-index:2}.anchor.is__fitToContent{margin-bottom:40px}.anchor.is__fitToContent.is__lastChild,.anchor.is__fitToContent:last-child{margin-bottom:0}.anchor.is__ghost{margin-bottom:40px}.anchor.is__ghost:first-child{margin-top:9px}.anchor.is__ghost.is__lastChild,.anchor.is__ghost:last-child{margin-bottom:0}.anchor.has__heading{margin-top:16px}.anchor.has__heading .is__firstChild,.anchor.has__heading:first-child,div.anchor.is__fitToContent.is__firstChild,div.anchor.is__fitToContent:first-child{margin-top:0}div.anchor.is__fitToContent.is__lastChild,div.anchor.is__fitToContent:last-child{margin-bottom:0}.textNode.is__list div.anchor{margin-top:-9px}div.anchor.is__empty,div.anchor:empty{background:none;margin:0!important;padding:0!important}.anchor-in{display:flex;flex-direction:column}div.anchor .anchor-in{flex-basis:calc(100% + 0.6em);margin:-.475em -.3em -.35em;padding:.475em .3em .35em}.example li div.anchor .anchor-in{margin:-.3924em 0 -.3054em!important;padding:0}span.anchor .anchor-in{display:inline;margin-left:-.1em;margin-right:-.1em;padding-left:.1em;padding-right:.1em}.anchor.is__active .anchor-in{background-color:#f9f6e4;background-color:var(--secondaryKeyColor,var(--anchorBackgroundColor,var(--activeColor,#f9f6e4)));cursor:auto;transition-delay:0s;transition-duration:0s;z-index:1}.spread.is__invertColors .anchor.is__active .anchor-in{background-color:rgba(255,255,255,.2);background-color:var(--secondaryKeyColor,var(--anchorBackgroundColor,var(--activeColor,rgba(255,255,255,.2))))}.anchor.is__ghost .anchor-in{background:none;cursor:auto;margin:0;padding:0}.anchor.is__empty .anchor-in{display:none}.anchorIndicatorBox{align-items:flex-end;border-bottom:.8666666667em solid transparent;display:flex;font-size:14px;height:.1666666667rem;line-height:1.2;margin-bottom:.8666666667em;padding-bottom:.0833333333rem;position:absolute;top:calc(100% - .1rem);z-index:100}.page_left .anchorIndicatorBox{left:2.7777777778vw;margin-left:-8px}.page_right .anchorIndicatorBox{margin-right:-8px;right:2.7777777778vw}.pageNumber .anchorIndicatorBox{margin-right:5px;right:100%;top:0}.page.is__vertical-half .anchorIndicatorBox{bottom:calc(.08333rem - 30px)}.spread.is__mobileOverhead .anchorIndicatorBox{align-items:center;border-bottom:0 solid transparent;bottom:2px;display:none;flex-direction:column;height:18px;left:0;margin:0;padding-bottom:0;right:0;top:auto}@media only screen and (min-aspect-ratio:1/1){.spread.is__mobileOverhead .anchorIndicatorBox{bottom:35px}}.anchorIndicator{padding:0 10px}.anchorIndicator,.anchorIndicator-in{align-items:center;display:flex;height:18px;position:relative}.anchorIndicator.is__continuous .anchorIndicator-in:after{background:#000;content:"";height:1px;left:0;position:absolute;top:50%;transform:translateY(-25%);transition:width .2s;width:var(--progressWidth);will-change:width;z-index:-1}.spread.is__invertColors .anchorIndicator.is__continuous .anchorIndicator-in:after,.spread.is__invertControls .anchorIndicator.is__continuous .anchorIndicator-in:after,.spread.is__invertSearch .anchorIndicator.is__continuous .anchorIndicator-in:after{background:#fff}.anchorDot{height:24px;margin-left:-10px;transform:scale(.25);width:24px}.anchorIndicator.is__continuous .anchorDot{margin-right:2px;will-change:opacity}.anchorDot:last-child{margin-right:-10px!important}.anchorIndicator.is__animated .anchorDot{transition:.2s}.anchorDot.is__passed{opacity:0}.anchorDot-in{background:var(--pageBackgroundColor,#fff);border:1px solid #000;border-radius:50%;height:100%;width:100%}.anchorIndicator.is__animated .anchorDot-in{transition:.2s}.spread.is__invertColors .anchorDot-in,.spread.is__invertControls .anchorDot-in,.spread.is__invertSearch .anchorDot-in{background:var(--pageBackgroundColor,#000);border-color:#fff}.anchorDot.is__simple .anchorDot-in{border-width:13px;transform:scale(.3);transition:.2s}.anchorDot.is__simple.is__current .anchorDot-in{border-width:4px;transform:scale(1)}@media only screen and (max-width:991px){.spread[data-anchor-indicator=mobileOverhead] .page_top{padding-bottom:27px!important;position:relative!important;right:auto!important}.spread[data-anchor-indicator=mobileOverhead] .anchorIndicatorBox{display:flex!important}}.calloutLine{display:none;height:1px;left:0;position:absolute;top:0;transform-origin:0 -50%;transition:transform .1s,width .1s;width:1px;z-index:100}.spread.is__visible .calloutLine{display:block;outline:1px solid rgba(255,255,255,0)}.device__mobile .calloutLine{z-index:200}.calloutLine-inner{background:rgba(0,0,0,.3);height:100%;transition:opacity .5s}@media only screen and (min-device-width:768px) and (max-device-width:1024px) and (-webkit-min-device-pixel-ratio:1){.calloutLine-inner{background:rgba(0,0,0,.15);transform:none}}@media (-webkit-min-device-pixel-ratio:1.5),(min-resolution:144dpi){.calloutLine-inner{transform:scaleY(.5) translateZ(0)}}.calloutLine.is__hidden .calloutLine-inner{opacity:0}.caption{box-sizing:border-box;flex:initial;font-size:14px;line-height:1.2;min-width:80px;position:relative;white-space:normal}.caption:not(.is__marginal){margin-bottom:40px}.caption.col,.caption.is__lastChild,.caption:last-child{margin-bottom:0!important}.media+.caption,.module+.caption{margin-top:calc(.73333em + 3px)}.media+.caption.is__footnote,.module+.caption.is__footnote{margin-top:20px}.caption+.anchor.is__empty+.caption,.caption+.caption,.caption+.caption.is__footnote,.caption+.sidenote,.sidenote+.caption.is__footnote{margin-top:calc(1.2em - 40px)}.caption.row[class*=rowsGutter__],.textNode.has__caption+.caption{margin-top:0}.caption.is__compact,.is__sticky .caption.is__compact{font-size:.6em;line-height:1.2em}.caption.is__switcherItem{margin-top:-5px;padding-top:5px}.caption.is__switcherItem.is__fader{margin:0;padding:5px 0 0}@media only screen and (max-width:991px){.is__sticky .caption:not(.is__switcherItem):not(.is__compact){flex-shrink:0}.module.is__align-center .caption{text-align:left}}.captionbox{align-self:flex-start;margin-top:-1px;min-width:250px}.captionbox.is__switcherItem{bottom:-5px;left:-5px;padding:5px!important;right:-5px;top:-5px}.captionbox .caption-text{padding-bottom:7.5px}.caption-text{background:inherit}.is__hacky .caption-text{background:transparent}@media only screen and (max-width:991px){.caption.is__stuck{margin-bottom:20px!important}}.checkList-box{background:none;cursor:auto;margin:0;padding:0}.checkList-box div.not(.sidenote) p:first-child{margin-bottom:0;margin-top:-.45em}.checkList-box div.not(.sidenote) p:last-child{margin-bottom:-.35em}.checkGroup{flex:initial;margin-bottom:.0833333333rem}.checkGroup:last-child{margin-bottom:0}.checkGroup .checkList-box>.module{margin-bottom:20px}.checkGroup .checkList-box>.module:last-child{margin-bottom:0}.checkItem{cursor:pointer;font-family:Bureausans,Arial,sans-serif;font-size:17px;margin-bottom:3px;padding:14px 3em 1px 20px;position:relative;touch-action:manipulation}.checkItem:hover{color:#fcc033;color:var(--keyColor,#fcc033)}.checkItem:hover:after{background-color:#fcc033;background-color:var(--keyColor,#fcc033)}.checkItem:hover.is__checked:before{color:#fcc033;color:var(--keyColor,#fcc033)}.checkItem:after{background:rgba(0,0,0,.2);bottom:0;content:"";display:block;height:1px;left:20px;pointer-events:none;position:absolute;right:3em}.checkItem:before{content:"☐";margin-left:-1.15em;position:absolute}.checkItem.is__checked:before{color:green;content:"β˜‘οΈŽ"}.book.is__debug .checkItem.is__correct{outline:1px dotted green}.checkGroup-controls{opacity:0;padding-left:.4em;padding-top:.9em;position:absolute;right:0;top:0;transition:opacity .4s ease;width:3em}.is__dirty .checkGroup-controls{opacity:1}.checkGroup-controlsInner{margin-bottom:3px;position:sticky;top:9px}.is__visible .checkGroup-controlsInner{transform:translateZ(0)}.checkGroup-progress{height:1em;position:relative;width:1em}.checkGroup-progress .progressPie{margin-left:0}.checkGroup-score{color:#000!important;font-size:12px}.checkGroup-score .checkGroup-scoreResult{color:green!important}.cols{--gutter:var(--colsGutter,20px);--gutterTransposed:var(--colsGutterTransposed,40px)}.cols:not(.col,.col-in){--parentGutter:var(--gutter)}.cols.colsGutterTransposed__cols{--gutterTransposed:var(--gutter,40px)}.cols.colsGutterTransposed__rows{--gutterTransposed:var(--rowsGutter,40px)}.cols{flex-flow:row}.cols.colsGutter__compact>.col{flex-basis:50%;vertical-align:bottom}.cols.grid__proportional.colsGutter__page{--gutter:2.7777777778vw}@media only screen and (max-width:991px){.cols.grid__proportional.colsGutter__page{--gutter:27.5277777778px;--gutter:40px}}.cols.grid__proportional.colsGutter__auto,.cols.grid__proportional.colsGutter__normal{--gutter:var(--colsGutter,20px)}.cols.grid__proportional.colsGutter__compact{--gutter:0}.cols.grid__proportional.colsGutter__compact>.col{margin:0}.cols.grid__proportional.is__noGutter{--gutter:0}.cols.grid__column.colsGutter__page{--gutter:2.7777777778vw}@media only screen and (max-width:991px){.cols.grid__column.colsGutter__page{--gutter:27.5277777778px}}.cols.grid__column,.cols.grid__column.colsGutter__auto,.cols.grid__column.colsGutter__normal{margin-left:calc(var(--gutter)*-1/2);margin-right:calc(var(--gutter)*-1/2)}.cols.grid__column.colsGutter__compact{--gutter:0}.cols.grid__column.colsGutter__compact>.col>.col-in{margin:0}.cols.grid__column.is__noGutter{--gutter:0}@media only screen and (max-width:991px){.cols.is__transposeOnMobile.grid__column,.cols.is__transposeOnMobile.grid__proportional{flex-direction:column}.cols.is__transposeOnMobile.grid__proportional>.col.col{margin-left:0!important;margin-right:0!important}.cols.is__transposeOnMobile.is__reverse{flex-direction:column-reverse}.cols.is__transposeOnMobile.is__reverse>.col.col:first-child{margin-bottom:0}.cols.is__transposeOnMobile.is__reverse>.col.col:last-child{margin-bottom:var(--gutterTransposed)}.cols.is__transposeOnMobile.is__reverse>.col.col.is__blank{display:none}.cols.is__transposeOnMobile.is__reverse>.col.col.is__blank:first-child{display:flex;margin-bottom:calc(var(--gutterTransposed)*-1)}.cols.is__transposeOnMobile>.col.col{flex:0 1 auto;flex-basis:auto;margin-bottom:var(--gutterTransposed);margin-top:0}.cols.is__transposeOnMobile>.col.col.is__lastChild,.cols.is__transposeOnMobile>.col.col:last-child{margin-bottom:0}.cols.is__transposeOnMobile>.col.col.is__blank{display:none}.cols.is__transposeOnMobile>.col.col.is__blank:last-child{display:flex;margin-top:calc(var(--gutterTransposed)*-1)}}@media only screen and (max-width:991px){@media only screen and (max-aspect-ratio:1/1){.cols.is__transposeOnVerticalMobile{flex-direction:column}.cols.is__transposeOnVerticalMobile>.col.col{margin-bottom:var(--gutterTransposed);margin-left:0!important;margin-right:0!important}.cols.is__transposeOnVerticalMobile>.col.col.is__lastChild,.cols.is__transposeOnVerticalMobile>.col.col:last-child{margin-bottom:0}.cols.is__transposeOnVerticalMobile>.col.col.is__blank{display:none}.cols.is__transposeOnVerticalMobile>.col.col.is__blank:last-child{display:flex;margin-top:calc(var(--gutterTransposed)*-1)}}}@media only screen and (max-width:991px){.cols.is__legacyTransposeOnMobile.is__reverse{flex-direction:column-reverse}.cols.is__legacyTransposeOnMobile.is__reverse>.col:first-child{margin-bottom:0}.cols.is__legacyTransposeOnMobile.is__reverse>.col:last-child,.cols.is__legacyTransposeOnMobile>.col{margin-bottom:27px}}.cols.is__wrap{flex-wrap:wrap}.cols.heading-2.gutter__fTC{margin-bottom:18px}.col{flex-basis:0}.col.is__fitToContent{margin-bottom:0}.col.caption{flex:1}.cols.grid__proportional .col{margin-left:calc(var(--gutter)/2);margin-right:calc(var(--gutter)/2)}.cols.grid__proportional .col.cols{margin-left:calc(var(--parentGutter)/2);margin-right:calc(var(--parentGutter)/2)}.cols.grid__proportional .col.is__firstChild,.cols.grid__proportional .col:first-child{margin-left:0!important}.cols.grid__proportional .col.is__lastChild,.cols.grid__proportional .col:last-child{margin-right:0!important}.cols.grid__column.colsGutter__auto>.col>.col-in,.cols.grid__column.colsGutter__normal>.col>.col-in,.cols.grid__column>.col>.col-in{padding-left:calc(var(--gutter)/2);padding-right:calc(var(--gutter)/2)}.cols.grid__column.colsGutter__auto>.col>.col-in.cols,.cols.grid__column.colsGutter__normal>.col>.col-in.cols,.cols.grid__column>.col>.col-in.cols{padding-left:calc(var(--parentGutter)/2);padding-right:calc(var(--parentGutter)/2)}@media only screen and (max-aspect-ratio:1/1) and (max-width:991px){.col.has__questionImage{flex-basis:auto;margin-bottom:40px!important;order:-1}.col.has__questionImage .cols.is__transposeOnVerticalMobile .col.has__answerImage.is__lastChild{margin-bottom:0!important}}@media only screen and (max-aspect-ratio:1/1) and (max-width:991px){.cols.is__transposeOnVerticalMobile>.col:has(+.col.has__questionImage){margin-bottom:0!important}}@media only screen and (max-aspect-ratio:1/1) and (max-width:991px){.question .anchor-in.has__boxedAnswer>.cols.has__boxedAnswer:only-child>.col.has__boxedAnswer{margin-bottom:0}.question .anchor-in.has__boxedAnswer>.cols.has__boxedAnswer:only-child>.col:not(.has__boxedAnswer).is__lastChild{margin-bottom:20px;order:-1}.col.has__questionExample{margin-bottom:40px!important;order:-1}.question .cols .col.has__questionExample.is__answer.is__lastChild{margin-bottom:0!important}}@media only screen and (max-aspect-ratio:1/1) and (max-width:991px){.question .anchor.has__example:not(.has__boxedAnswer)>.anchor-in>.cols:has(.cols)>.col.has__questionExample.is__firstChild{margin-bottom:0!important}.question .anchor.has__example:not(.has__boxedAnswer)>.anchor-in>.cols:has(.cols)>.col:not(.has__questionExample){margin-bottom:20px!important}.question .anchor.has__example:not(.has__boxedAnswer)>.anchor-in>.cols:has(.cols)>.col:not(.has__questionExample).is__lastChild{order:-1}}@media only screen and (max-aspect-ratio:1/1) and (max-width:991px){.cols.has__example.is__answer.is__transposeOnVerticalMobile{margin-bottom:40px}.cols.has__example.is__answer.is__transposeOnVerticalMobile.is__lastChild{margin-bottom:0}}.is__comparator{inset:0;margin:-.06rem -2.7777777778vw -.1rem;position:absolute}.is__comparator .is__divided{border-left:1px solid rgba(255,255,255,.5);box-sizing:border-box}.is__comparator .comparatorBefore .comporatorText{left:2.7777777778vw;position:absolute;right:2.7777777778vw;top:.06rem}.is__comparator .comparatorAfter{bottom:0;overflow:hidden;position:absolute;right:0;top:0;z-index:2}.is__comparator .comparatorAfter .comporatorText{padding-left:5.5555555556vw;position:absolute;right:2.7777777778vw;top:.06rem}.is__comparator .comparatorAfter .image{bottom:0;margin-right:0!important;position:absolute;right:0;top:0}.is__comparatorOnMobile{-webkit-user-select:none;-moz-user-select:none;user-select:none}.is__comparatorOnMobile .image{isolation:auto}@media only screen and (min-aspect-ratio:1/1) and (max-width:991px){.is__comparatorOnMobile .image{--size:cover!important}}.is__comparatorOnMobile *,.is__comparatorOnMobile h3,.is__comparatorOnMobile img,.is__comparatorOnMobile p{pointer-events:none!important;-webkit-user-select:none;-moz-user-select:none;user-select:none}.is__comparatorOnMobile h3,.is__comparatorOnMobile img,.is__comparatorOnMobile p{-webkit-touch-callout:none;touch-action:none}.is__comparatorOnMobile .comparatorAfter{inset:0;opacity:0;position:absolute;z-index:2}.is__comparatorOnMobile .is__visible{opacity:1}.is__comparatorOnMobile .is__hidden{opacity:0}.contents{font-feature-settings:"smcp","c2sc";flex:initial;padding-left:0}.contents .contentslink{display:flex}.contents .contentslink .textNode{flex-basis:100%}.contents .contentslink:not(:last-child){margin-bottom:40px}.contents.is__noGroupContent .contentslink:not(:last-child){margin-bottom:60px}.contents .contentslink-page{margin-left:.64285714em}.contents.is__align-left .contentslink{text-align:left}.contents.is__align-center .contentslink{text-align:center}.contents.is__align-right .contentslink{text-align:right}.contents.is__fontNormal .contentslink{font-feature-settings:normal}.contents.is__fontSmallcaps .contentslink{font-feature-settings:"smcp","c2sc"}.contents.is__compact{list-style:none;text-align:center}.contents.is__compact .contentslink{-webkit-hyphens:none;hyphens:none}.contents.is__compact .contentslink:not(:last-child){margin-bottom:.8929em}.contents.is__compact.is__noGroupContent .contentslink:not(:last-child){margin-bottom:30px}.contents.is__compact .contentslink.is__blank{margin-top:1em}.contents.is__compact .contentslink-inner{box-shadow:none;text-decoration:none}.contents.is__compact .contentslink-page{margin-left:.32142857em}.contents:not(.row)+.contents:not(.row){margin-top:60px}.contents.is__compact:not(.row)+.contents.is__compact:not(.row){margin-top:30px}.contentslink p{text-indent:0}.contents li .contentslink{margin:0!important}.contentslink a,.contentslink a:hover{box-shadow:none!important;color:inherit!important;text-decoration:none!important}.main-contents .contentslink-placeholder{opacity:.2}.contentslink.is__disabled{color:inherit}.contentslink.is__disabled .link,.contentslink.is__disabled a,.contentslink.is__disabled a:hover{box-shadow:none!important;color:inherit!important;cursor:text;text-decoration:none!important}.contentslink-page{font-feature-settings:"smcp","c2sc";margin-left:.32142857em}.main-contents .contentslink-page{margin-left:1.8em}.controls{-webkit-tap-highlight-color:rgba(0,0,0,0);display:none;height:100%;left:0;pointer-events:none;position:absolute;top:0;width:100%;z-index:20}.spread.is__loaded .controls{display:block}.page.is__insideControls .controls{left:-2.7777777778vw;top:-.0833333333rem}.spread.is__noControls .controls{display:none!important}.spread.is__soon .controls{color:#000}.controls-in{background:inherit;height:1rem;min-height:600px;padding-top:.0833333333rem;position:absolute;top:0;width:0}.is__mobileOverhead .controls-in,.is__mobileSticky .controls-in{position:sticky!important;top:0}@media only screen and (max-width:991px){.controls-in{min-height:1rem}}@media only screen and (min-aspect-ratio:1/1) and (max-width:991px){.controls-in{position:sticky!important;top:0}}.is__mobile .controls-in{display:none}.is__loaded .controls-in,.is__mobile .is__loaded .controls-in{display:block;position:sticky}@media only screen and (max-width:991px){.is__loaded .controls-in,.is__mobile .is__loaded .controls-in{position:absolute}}.is__desk .is__loaded .bookmark,.is__desk .is__loaded .checkmark,.is__desk .is__loaded .controls,.is__desk .is__loaded .controls-in,.is__desk .is__loaded .search-button{transform:translateZ(0)}.is__desk.no__sticky .is__loaded .bookmark,.is__desk.no__sticky .is__loaded .checkmark,.is__desk.no__sticky .is__loaded .controls,.is__desk.no__sticky .is__loaded .controls-in,.is__desk.no__sticky .is__loaded .search-button{transform:none}.bookmark,.checkmark,.editlink,.search-button{border-radius:50%;cursor:pointer;font-size:18px;margin-left:-35px;margin-top:-4px;pointer-events:auto;position:absolute;touch-action:manipulation;-webkit-user-select:none;-moz-user-select:none;user-select:none}.book.is__inFocusMode .bookmark,.book.is__inFocusMode .checkmark,.book.is__inFocusMode .editlink,.book.is__inFocusMode .search-button{pointer-events:none}@media only screen and (max-width:991px){.bookmark,.checkmark,.editlink,.search-button{background-color:transparent!important;font-size:20px}}.bookmark{height:34px;left:2.7777777778vw;margin-left:-45.5px;margin-top:-10px;padding-top:6px;position:absolute;width:34px}@media only screen and (max-width:991px){.bookmark{background:transparent!important;left:calc(4.16667vw - 11px);margin-left:0;margin-top:-8px;padding-top:4px;top:12.5px}@media only screen and (min-aspect-ratio:1/1){.bookmark{left:calc(env(safe-area-inset-left)*.65)}}}.bookmark:after{content:"πŸ”–"}.bookmark.is__active{color:#fcc033;color:var(--keyColor,#fcc033)}.bookmark.is__active:after{content:"πŸ”—"}.bookmark.is__failed{opacity:.2}.bookmark:hover{color:#fcc033;color:var(--keyColor,#fcc033)}.spread.is__invertBookmark .bookmark,.spread.is__invertControls .bookmark{color:#fff}.spread.is__service .bookmark{display:none}.checkmark{left:1.3888888889vw;margin-left:-6px;margin-top:-2.5px;opacity:.2}@media only screen and (max-width:991px){.checkmark{font-size:1.2em;left:12.5vw;margin-left:0;top:6px}}.checkmark:after{content:"βœ“"}.checkmark:hover{opacity:1}.checkmark.is__active{color:#fcc033;color:var(--keyColor,#fcc033);opacity:1}.checkmark.is__failed{opacity:.1}.spread.is__invertBookmark .checkmark,.spread.is__invertControls .checkmark{color:#fff}.bookmark{background:inherit}.spread.is__broken .bookmark,.spread.is__invertBookmark .bookmark,.spread.is__invertControls .bookmark{background:transparent}.bookmark,.checkmark,.editlink,.search-button{transition:opacity .1s ease}.spread.is__overlappedLeft .bookmark,.spread.is__overlappedLeft .checkmark,.spread.is__overlappedRight .editlink,.spread.is__overlappedRight .search-button{background:none;opacity:0;pointer-events:none}.search{left:16.6666666667vw}@media only screen and (max-width:991px){.search{left:165.1666666667px}}.search{width:13.8888888889vw}@media only screen and (max-width:991px){.search{width:137.6388888889px}}.search{background:inherit;pointer-events:none;position:absolute}@media only screen and (max-width:991px){.search{left:auto;top:12.5px;width:100vw}}.spread.is__invertControls .search,.spread.is__invertSearch .search{color:#fff}.search-holder{background:inherit;pointer-events:auto}.search-holder:hover{color:#fcc033;color:var(--keyColor,#fcc033);cursor:pointer}.spread.is__invertControls .search-holder:hover,.spread.is__invertSearch .search-holder:hover{color:#fff}.search-button{background-color:inherit;height:34px;left:auto;margin-left:0;margin-right:-43.5px;margin-top:-11px;padding:7px 0 4px;right:0;text-align:center;width:34px;z-index:1}@media only screen and (max-width:991px){.search-button{background-color:transparent;margin-right:calc(4.16667vw - 10px);margin-top:-8px;padding-top:4px}@media only screen and (min-aspect-ratio:1/1){.search-button{margin-right:calc(env(safe-area-inset-right)*.65)}}}.search-button:after{content:"πŸ”"}.spread.is__broken .search-button,.spread.is__invertControls .search-button,.spread.is__invertSearch .search-button{background-color:transparent}.search-header{font-feature-settings:"smcp","c2sc";background:inherit;cursor:pointer;font-size:.7em;line-height:1;padding-right:35px;position:absolute;right:-35px;top:-3px;white-space:nowrap}.spread.is__noHeader .search-header,.spread.is__noHeaderMoveUp .search-header,.spread.is__soon .search-header{display:none}.spread.is__soon .search-header{color:#dcdcdc}@media only screen and (max-width:991px){.search-header{display:none}}.editlink{background:rgba(0,0,0,.2);border-radius:50%;box-shadow:none!important;display:none;font-size:.75em;height:50px;margin:24px 0;padding:16px;right:calc(20px - 100vw);text-decoration:none!important;width:50px}@media only screen and (max-width:991px){.editlink{display:none!important}}.editlink:after{color:#fff;content:"\e803";font-family:Icons}.editlink:hover{background:rgba(0,0,0,.3)}.editlink.is__enabled{display:block}.page.is__insideControls{z-index:25}.addspread{background:rgba(0,0,0,.2);border-radius:50%;cursor:pointer;height:50px;margin-top:-35px;position:absolute;right:20px;width:50px;z-index:100}@media only screen and (max-width:991px){.addspread{display:none!important}}.addspread.is__loading{animation:spin 1s ease-in 1;background:rgba(0,0,0,.3)}.addspread.is__still-loading{animation:spin-clone .5s linear infinite}.addspread:after,.addspread:before{background:#fff;content:"";display:block;height:2px;left:11px;margin:-1px auto auto;position:absolute;top:50%;width:28px}.addspread:after{transform:rotate(90deg)}.addspread:hover{background:rgba(0,0,0,.3)}@media only screen and (max-aspect-ratio:1/1) and (max-width:991px){.is__invertControlsOnVerticalMobile .bookmark,.is__invertControlsOnVerticalMobile .checkmark,.is__invertControlsOnVerticalMobile .search{color:#fff}}.cfc{bottom:0;display:flex;left:0;position:absolute;right:0;top:0;transform-style:preserve-3d}body.is__skip-cover .cfc{display:none}.cfc-in{background:rgb(227,0,22);background-size:100% 100%;border-radius:2px;color:#fff;perspective:1000px;transform:rotateX(-180deg) rotateY(180deg) translateZ(0);transform-style:preserve-3d;z-index:1000}.cfc-author,.cfc-in{-webkit-backface-visibility:hidden;backface-visibility:hidden}.cfc-author{font-size:.0235rem;left:8.35%;padding:0;position:absolute;top:69%;transform:translateZ(5px)}.cfc-author .frontpage-author{margin-bottom:.27em}.cfc-author .frontpage-title.heading-1{margin-bottom:0}.cfc-author .frontpage-title h1{line-height:.93;margin-bottom:0}@media screen and (max-width:71vh){.cfc-author{font-size:3.3vw!important}}.book:before{-webkit-backface-visibility:hidden;backface-visibility:hidden;background:rgb(92,66,59) url(../images/cover/endpaper-69447d2540.png);background-position:50% 0;bottom:0;content:"";left:0;opacity:0;pointer-events:none;position:fixed;right:0;top:0}body:not(.no__negativeZIndexOnCover) .book:before{z-index:-1}.is__skip-cover .book:before{opacity:1}body.is__mobile .book:before{display:none!important}.coverbox{bottom:0;left:0;opacity:0;pointer-events:none;position:fixed;right:0;top:0}.coverbox.is__start{transform:translateY(40px)}body.is__skip-cover .coverbox{display:none}body.is__ready .coverbox.is__ready.is__loaded{opacity:1;transform:translateY(0);transition:opacity 3s cubic-bezier(.445,.05,.55,.95) 1s,transform 3s ease-out}body.is__ready.is__skip-cover .coverbox.is__ready.is__loaded,body.is__skip .coverbox{transform:translateY(0);transition:none!important}body.is__skip-cover:not(.no__negativeZIndexOnCover) .coverbox{z-index:-1}body.is__mobile.is__skip-cover .coverbox{display:none}body.is__mobile .book{background:rgb(92,66,59) url(../images/cover/endpaper-69447d2540.png) repeat}.coverholder{perspective-origin-x:50%;perspective-origin-y:50%;perspective:3500px}.coverbox-curtain,.coverholder{bottom:0;left:0;position:absolute;right:0;top:0}.coverbox-curtain{background:#000;display:none;opacity:0;pointer-events:none;z-index:3000}.is__end .coverbox-curtain{display:block}.dummy-zoomer{height:100%;left:0;transform-style:preserve-3d;width:100%}.dummy,.dummy-zoomer{position:absolute;top:0}.dummy{left:50%;transform:translateY(.1rem);transform-origin:50% 100%;transform-style:preserve-3d;-webkit-user-select:none;-moz-user-select:none;user-select:none}.dummy,.dummyLikeContainer.dummyLikeContainer{height:1rem;margin-left:-.355rem;width:.71rem}@media screen and (max-width:71vh){.dummy,.dummyLikeContainer.dummyLikeContainer{height:134.9765258216vw;margin-left:-47.9166666667vw;max-height:1rem;max-width:.71rem;width:95.8333333333vw}.is__end .dummy,.is__end .dummyLikeContainer.dummyLikeContainer{height:1rem;margin-left:-.355rem;width:.71rem}}.dummy-back,.dummy-book-front,.dummy-front,.dummy-spine{pointer-events:all}.dummy-back,.dummy-back-in,.dummy-book,.dummy-book-front,.dummy-cover,.dummy-front,.dummy-spine{transform-style:preserve-3d}.dummy-back,.dummy-book,.dummy-book-back,.dummy-book-front,.dummy-front,.dummy-shadow,.dummy-spine{height:100%;position:absolute;width:100%}.dummy-cover,.dummy-flyleaf{-webkit-backface-visibility:hidden;backface-visibility:hidden;bottom:0;left:0;position:absolute;right:0;top:0}.dummy-cover{border-radius:3px}body.is__skip-cover .dummy-cover{display:none}.dummy-shadow{background:#000}body.is__mobile .dummy-shadow,body.is__skip-cover .dummy-shadow{display:none}.dummy-flyleaf{transform:translateZ(1px)}.dummy-flyleaf.dummy-book-back,.dummy-front .dummy-flyleaf{border-radius:3px 0 0 3px}.dummy-back .dummy-flyleaf,.dummy-flyleaf.dummy-book-front{border-radius:0 3px 3px 0}.dummy-spine{display:none;height:100%;transform:rotateY(90deg) translateX(2px);transform-origin:0 0;width:.0491447426rem;z-index:3}.coverbox.is__end .dummy-spine{display:block}.dummy-spine-in{-webkit-backface-visibility:hidden;backface-visibility:hidden;background:rgb(227,0,22) url(../images/cover/spine-373e99b099.png);background-size:100% 100%;border-radius:3px;bottom:0;left:-.005730659rem;position:absolute;right:-.005730659rem;top:0;transform:rotateY(180deg)}.dummy-front{right:100%;transform:rotateY(180deg);transform-origin:100% 0;z-index:3}.dummy-front .dummy-cover{transform:rotateX(180deg) translateZ(.005730659rem)}.dummy-front .dummy-cover:after{background:rgb(216,0,21);bottom:1.5px;content:"";position:absolute;right:100%;top:0;transform:rotateY(-90deg) translateY(1px);transform-origin:100% 0;width:.005730659rem}.dummy-front .dummy-cover:before{background:rgb(216,0,21);bottom:0;content:"";left:0;position:absolute;top:0;transform:rotateY(-45deg) translateX(-1px);transform-origin:100% 0;width:3px}.dummy-front .dummy-flyleaf{background-position:100% 0;right:-1px}.dummy-back{display:none;transform:translateZ(-.0491447426rem);transform-origin:0 100%;z-index:4}.coverbox.is__end .dummy-back{display:block}.dummy-back .dummy-cover{background:rgb(227,0,22);background-size:cover;transform:rotateX(180deg) translateZ(.005730659rem)}.dummy-back .dummy-cover:after{background:rgb(216,0,21);bottom:1.5px;content:"";left:100%;position:absolute;top:1.5px;transform:rotateY(90deg) translateZ(0);transform-origin:0 0;width:.005730659rem}.dummy-back .dummy-flyleaf{background-position:2px 0;left:-1px}.dummy-back-in{height:100%;position:absolute;transform-origin:0 0;width:100%}.dummy-flyleaf{background:rgb(92,66,59) url(../images/cover/endpaper-69447d2540.png);background-position:0 0;background-size:1000px}.dummy-book{transform-origin:0 0;z-index:2}.dummy-book-front{overflow:hidden}.dummy-book-front .dummy-shadow{box-shadow:0 20px 50px 50px #000;transform-origin:0 50%}.dummy-book-front .dummy-flyleaf{background-position:2px 0;left:-1px}.dummy-book-back{display:none;overflow:hidden;transform:translateZ(-.0491447426rem) rotateX(180deg) rotate(180deg)}.dummy-book-back .dummy-flyleaf{background-position:100% 0;right:-1px}.dummy-book-back .dummy-shadow{box-shadow:0 -20px 50px 50px #000;right:0}.coverbox.is__end .dummy-book-back{display:block}@-moz-document url-prefix(){.coverbox .dummy-front{transform:translateZ(0)}.coverbox .dummy-front .dummy-cover{z-index:10}.coverbox .frontpage-author,.coverbox .frontpage-title{backface-visibility:hidden}.coverbox.is__end .dummy-back,.coverbox.is__end .dummy-cover{z-index:10}}.dummy-extraBack,.dummy-extraFront{bottom:0;height:1rem;left:50%;margin-left:-.355rem;position:absolute;top:.1rem;width:.71rem;z-index:100}.coverbox.is__end .dummy-extraBack,.coverbox.is__end .dummy-extraFront,body.is__skip-cover .dummy-extraBack,body.is__skip-cover .dummy-extraFront{display:none}.dummy-extraFront{transform:translateZ(0);z-index:100}.dummy-extraBack{z-index:0}canvas#demoWatermark{left:0;position:absolute;top:0;visibility:hidden}.demoWatermark{background-position:0 0;background-size:282.84px;bottom:0;left:0;opacity:.5;position:absolute;right:0;top:0}.dummy-book-back .demoWatermark,.dummy-front .demoWatermark{background-position:100% 0}.book .demoWatermark{-webkit-backface-visibility:hidden;backface-visibility:hidden;opacity:0;pointer-events:none;position:fixed}.is__skip-cover .book .demoWatermark{opacity:.5}.undersite.is__new{-webkit-font-smoothing:subpixel-antialiased;font-smoothing:subpixel-antialiased;opacity:0}body.is__skip-cover .undersite.is__new{display:none}.undersite.is__new .embeddedSubscriptionForm{display:block;height:0;min-width:100%;position:relative;width:1px}@media screen and (min-width:993px){.undersite.is__new{bottom:0;height:100%!important;left:0;position:fixed;width:100%;z-index:-1}.undersite.is__new .embeddedSubscriptionForm{bottom:0;height:100%;left:0;position:absolute}}@media screen and (max-width:992px){.undersite.is__new{position:relative;z-index:9999}.undersite.is__new .embeddedSubscriptionForm{min-height:1rem}}.cross{display:inline-block;height:38px;position:relative;width:38px}.cross:after,.cross:before{background:currentColor;content:"";height:3px;left:0;margin-top:-1.5px;position:absolute;top:50%;transform:rotate(45deg);transform-origin:50% 50%;width:38px}.cross:after{transform:rotate(-45deg)}.has__discreetAnimation{transition-duration:.4s;transition-timing-function:ease}.example{color:#fcc033;color:var(--keyColor,#fcc033);flex:0 0 auto;font:normal 16px/1.125 Bureausans,Arial,sans-serif;margin-bottom:2.5em;margin-top:1.25em}.is__boxed .example{color:var(--exampleColor,#000)}.example.is__indented{padding-left:1.25em}@media only screen and (max-width:991px){.example.is__compact{font-size:19px}}.example.is__firstChild,.example:first-child,.gutter__fTC+.example{margin-top:0}.example.has__caption,.example.has__sidenote,.example.is__lastChild,.example:last-child{margin-bottom:0}.example+.example{margin-top:-1.25em}.example .example{margin-bottom:0;margin-top:0}.example .example+.example{margin-top:1.25em}.example .example+.example.col{margin-top:0}.example .example.col,.example .example.is__lastChild,.example .example:last-child{margin-bottom:0}.example.has__indentedLiftOutNeighbour{margin-bottom:1.25em}.example+.example.is__liftOut,.example.row.row,.heading-1+.example.is__liftOut{margin-top:0}.example.col,.example.col-in{flex:1;margin-top:0}.example h3{color:#000;font-size:1em}.example .anchor{margin-bottom:0!important;margin-top:0!important;padding-bottom:0;padding-top:0}.example a,.example u{color:inherit;-webkit-text-decoration-color:var(--exampleUnderlineColor,rgba(227,0,22,.15));text-decoration-color:var(--exampleUnderlineColor,rgba(227,0,22,.15));text-decoration-thickness:.0283em;text-underline-offset:.34375em}.example a:hover{color:var(--linkColor,--keyColor,rgb(227,0,22));-webkit-text-decoration-color:var(--linkColor,var(--keyColor,rgb(227,0,22)));text-decoration-color:var(--linkColor,var(--keyColor,rgb(227,0,22)))}.example .tableNode{margin:1.25em 0 2.5em}.example .tableNode+.tableNode,.example .tableNode:first-child{margin-top:0}.example .tableNode:last-child{margin-bottom:0}.example table{margin-bottom:-.3054em;margin-top:-.2em}.example tr h3{margin-bottom:0!important;margin-top:0!important}.example tr.has__heading-3 td{padding-bottom:0;padding-top:calc(16px + .2225em)}.example td,.example th{padding:.3125em .625em}.example thead tr:last-child td,.example thead tr:last-child th{padding-bottom:.3125em}.example+.example.cloneGroup th{padding-top:calc(40px - .8179em)}@media only screen and (max-width:991px){.example.is__transposeOnMobile+.example.is__transposeOnMobile{margin-top:0}.example.is__transposeOnMobile .example.col:not(:last-child){margin-bottom:1.25em}.page.is__sticky .example:not(.is__liftOut){font-size:10px}}@media only screen and (max-width:991px){@supports (font-size:max(0px)){.page.is__sticky .example:not(.is__liftOut){font-size:max(10px,min(16px,1.5vmax))}}.page.is__sticky .switcher.is__zoomed .example{font-size:16px}}.is__liftOut{margin-top:20px}@media only screen and (max-width:991px){.sidenote+.is__liftOut{margin-top:0}.example.cols.cols.cols.is__transposeOnMobile{margin-bottom:40px}.example.cols.cols.cols.is__transposeOnMobile.has__caption,.example.cols.cols.cols.is__transposeOnMobile.has__sidenote,.example.cols.cols.cols.is__transposeOnMobile.is__lastChild,.example.cols.cols.cols.is__transposeOnMobile:last-child{margin-bottom:0}}.example.is__liftOut.is__liftOut{font-size:.03666666667rem;font-weight:100;margin-bottom:1.3em;opacity:0}.example.is__liftOut.is__liftOut.is__lastChild,.example.is__liftOut.is__liftOut:last-child{margin-bottom:0}.example.is__liftOut.is__liftOut h3{font-size:16px}.example.is__liftOut.is__liftOut.has__caption.has__caption,.example.is__liftOut.is__liftOut.has__sidenote.has__sidenote.has__sidenote{margin-bottom:calc(1.13em - 4px)}.example.is__liftOut.is__liftOut.has__caption.has__caption+.caption,.example.is__liftOut.is__liftOut.has__caption.has__caption+.sidenote,.example.is__liftOut.is__liftOut.has__sidenote.has__sidenote.has__sidenote+.caption,.example.is__liftOut.is__liftOut.has__sidenote.has__sidenote.has__sidenote+.sidenote{margin-top:0}.example.is__liftOut.is__liftOut.is__ready{opacity:1}.example.is__liftOut.is__liftOut+.example.is__liftOut.is__liftOut,.example.is__liftOut.is__liftOut+.example.is__liftOut.is__liftOut.col{margin-top:0}.example.is__liftOut.is__liftOut.col{margin-bottom:0}.example.is__liftOut.is__liftOut .label+.textNode{margin-top:5px}@media only screen and (max-width:991px){.example.is__liftOut.is__liftOut .example-label{margin-bottom:0}.example.is__liftOut.is__liftOut .example-label+.module,.example.is__liftOut.is__liftOut .example-label+.textNode,.example.is__liftOut.is__liftOut .example-label+ul{margin-top:.5em}}.example.is__liftOutXL .example-label{margin-bottom:15px;margin-top:0}.example.is__liftOutXL .example-label p{margin-bottom:-4.5px;margin-top:-5.5px}.example.is__liftOutXL+.module.is__fitToContent:not(.example){margin-top:-.3em}.module.is__fitToContent:not(.example)+.example.is__liftOutXL{margin-top:.5em}.label+.example.is__liftOutXL{margin-top:25px}.example.is__liftOutXXXL.is__liftOutXXXL{margin-bottom:.65em}.example-label{color:#1a2028;margin-bottom:15px}.label+.example.linksgap-example{margin-top:26px}.example.is__answer{margin-top:0}.exerciseControls{bottom:0;display:flex;flex-direction:column;justify-content:flex-end;left:100%;margin-left:10px;position:absolute;top:0}.exerciseControls-reset{background:none;border:0;display:block;margin-bottom:-7px;outline:0;padding:0;touch-action:manipulation}.exerciseControls-reset:hover{color:#fcc033;color:var(--keyColor,#fcc033)}.exerciseControls-result{color:green;display:block;margin-left:.1em}.exerciseControls-result.is__failed{color:rgb(227,0,22);color:var(--errorColor,rgb(227,0,22));margin-left:0}.exerciseControls-spinner{background:url('data:image/svg+xml;utf8,');background-size:contain;height:16px;opacity:0;position:absolute;top:0;transition:opacity .2s ease;width:16px}.exerciseControls-spinner.is__active{opacity:1;transition-delay:.8s}.progressPie{height:20px;margin-bottom:5px;margin-left:-.1em;position:relative;width:20px}.is__visible .progressPie{transform:translateZ(0)}.progressPie.is__hidden{visibility:hidden}.progressPie svg{display:block;height:100%;width:100%}.progressPie circle{fill:green;stroke:green;stroke-width:.5px}.progressPie path{fill:#fff}.progressPie-checkmark{color:#fff;display:none;font-size:.467em;font-weight:700;position:absolute;text-align:center;top:1px;width:100%;z-index:40}.progressPie.is__completed .progressPie-checkmark{animation:checkmarkPulse .52s cubic-bezier(.215,.61,.355,1);display:block}@keyframes checkmarkPulse{0%{transform:scale(1)}15%{transform:scale(2)}to{transform:scale(1)}}.is__test{--testShiftSize:20px}.explanation{font-family:Bureausans,Arial,sans-serif;opacity:0;visibility:hidden}.explanation.is__visible{opacity:1;transition:opacity .4s ease;visibility:visible}.explanation .caption-text{padding-top:calc(.73333em + 3px)}.answer+.explanation{margin-top:.3333em}.answer+.explanation.answerExplanation{margin-bottom:8.5px;margin-top:-3px;padding-left:20px}.answer+.explanation.answerExplanation:last-child{margin-bottom:--4.5px}.widget+.explanation{margin-top:-3px;padding-left:20px}.answer.is__boxed+.explanation,.question.is__imageQuestion .answer+.explanation{margin-top:.7333333333em;padding-left:0!important}.answer.is__boxed+.explanation .caption-text,.question.is__imageQuestion .answer+.explanation .caption-text{padding-top:0}.glvrdExercise+.explanation{margin-top:calc(5px + .3333em)}.questionExplanation:last-child{margin-bottom:-4.5px!important}.glvrdExerciseExplanation,.questionExplanation{min-height:2em;opacity:1;padding-left:18px;visibility:visible}.glvrdExerciseExplanation .caption-text,.questionExplanation .caption-text{opacity:0;position:absolute;visibility:hidden}.glvrdExerciseExplanation.has__reservedPlace .caption-text,.questionExplanation.has__reservedPlace .caption-text{position:relative;visibility:initial}.glvrdExerciseExplanation.is__visible .caption-text,.questionExplanation.is__visible .caption-text{opacity:1;position:relative;transition:opacity .4s ease;visibility:visible}.question .textNode.has__caption{margin-bottom:0}.question .textNode.has__caption+.explanation{margin-top:calc(.55em + 5px)}.question .module+.cols.is__explanation{margin-top:calc(.3333em - 20px)}.explanationControl{-webkit-tap-highlight-color:rgba(0,0,0,0);-webkit-appearance:none;-moz-appearance:none;appearance:none;background:transparent;border:none;display:inline-block;font-size:18px;left:-5px;line-height:18px;outline:none;padding:0 5px;position:absolute;top:11px;touch-action:manipulation}.spread:not(.device__mobile) .explanationControl:hover{color:#fcc033;color:var(--keyColor,#fcc033)}.explanationControl:before{content:"❔"}.explanation.is__visible .explanationControl:before{content:"❓"}.answerExplanation{position:absolute}.is__revealed .is__checked+.answerExplanation{opacity:1;position:relative;transition:opacity .4s ease;visibility:visible}.answer.is__correct.is__checked.has__explanation+.explanation,.question.is__standalone.is__correct .explanation{color:green;color:var(--correctAnswerColor,green)}.question.is__standalone.is__wrong .explanation{color:red;color:var(--incorrectAnswerColor,red)}.is__revealed .is__shiftedAnswer,.is__shiftedDown{animation-name:shiftDown}.is__shiftedUp{animation-name:shiftUp}.is__revealed .is__shiftedAnswer,.is__shiftedDown,.is__shiftedUp{animation-duration:.1s;animation-timing-function:ease}@keyframes shiftUp{0%{transform:translateY(var(--testShiftSize))}to{transform:translateY(0)}}@keyframes shiftDown{0%{transform:translateY(calc(var(--testShiftSize)*-1))}to{transform:translateY(0)}}.highlightmark{background:#ffe675}.has__active-highlight .highlightmark{animation:unhighlight 3s linear;animation-delay:4s;animation-fill-mode:forwards}@keyframes unhighlight{0%{background:#ffe675}to{background:transparent}}@supports (-moz-appearance:none){.image.image{image-rendering:auto}}.image{background-position:var(--position,center);background-repeat:no-repeat;background-size:var(--size,contain);flex:1;image-rendering:optimizeQuality;isolation:isolate;position:relative}@media only screen and (max-width:991px){.image{--position:top center}}.image *{pointer-events:none}.image :is(:not(div)){pointer-events:all}.image.is__ready{opacity:1}.image.is__align-top{--position:center top}.image.is__align-bottom{--position:center bottom}.image.is__align-center{--position:center}.image.is__align-center.is__align-top{--position:center top}.image.is__align-center.is__align-bottom{--position:center bottom}.image.is__align-right{--position:right center}.image.is__align-right.is__align-top{--position:right top}.image.is__align-right.is__align-bottom{--position:right bottom}.image.is__align-left{--position:left center}.image.is__align-left.is__align-top{--position:left top}.image.is__align-left.is__align-bottom{--position:left bottom}.image.is__boxed{--size:contain;background-origin:content-box}.image.is__cutOffBelow{--position:center top;--size:100% auto}@media only screen and (max-width:991px){.image.is__cutOffBelow{max-height:.9rem}}.image.is__cutOffBelow:after{background:#000;bottom:0;content:"";height:1px;left:-10px;position:absolute;right:-10px}@media only screen and (max-width:991px){.image.is__cutOffBelow:after{content:""!important;left:-.3em;right:-.3em}}.spread.is__invertColors .image.is__cutOffBelow:after{background-color:rgba(255,255,255,.3)}.image.is__cutOffBelow:before{content:""}.image.is__cutOffBelow.is__bordered,.spread.is__invertColors .image.is__cutOffBelow.is__bordered{border-bottom-width:0}.image.is__cutOffBelow.is__fitted:after,.image.is__cutOffBelow.is__inFlow:after{content:none}.image.is__cutOffBelow.is__fitted.is__bordered,.image.is__cutOffBelow.is__inFlow.is__bordered,.spread.is__invertColors .image.is__cutOffBelow.is__fitted.is__bordered,.spread.is__invertColors .image.is__cutOffBelow.is__inFlow.is__bordered{border-bottom-width:0}.image.is__cutOffBelow.is__fitted .image-cut,.image.is__cutOffBelow.is__fitted:before,.image.is__cutOffBelow.is__inFlow .image-cut,.image.is__cutOffBelow.is__inFlow:before{display:none}.image.is__cutOffBelow.is__fitted.is__forceCutOffBelow:after,.image.is__cutOffBelow.is__inFlow.is__forceCutOffBelow:after{content:""}.image.is__cutOffBelow.is__fitted.is__forceCutOffBelow .image-cut,.image.is__cutOffBelow.is__fitted.is__forceCutOffBelow:before,.image.is__cutOffBelow.is__inFlow.is__forceCutOffBelow .image-cut,.image.is__cutOffBelow.is__inFlow.is__forceCutOffBelow:before{display:block}.image.is__cutOffBelow.is__manualCutOffBelow:before{content:normal}.image.is__sequence{--position:50% 0}.image.is__fitToContent{align-self:center;flex:1}.image.is__fitToContent.is__align-left,.image.is__fitToContent.is__align-self-left,.image.is__fitToContent.is__align-self-top,.image.is__fitToContent.is__bleedBottom,.image.is__fitToContent.is__bleedLeft{align-self:flex-start}.image.is__fitToContent.is__align-right,.image.is__fitToContent.is__align-self-bottom,.image.is__fitToContent.is__align-self-right,.image.is__fitToContent.is__bleedRight,.image.is__fitToContent.is__bleedTop{align-self:flex-end}.image.is__fitToContent.is__original{align-self:stretch}.image.is__fitToContent.row{margin-bottom:40px}.image.is__fitToContent.row.is__lastChild,.image.is__fitToContent.row:last-child{margin-bottom:0}@media only screen and (max-width:991px){.image.is__fitToContent.is__align-left:not(.is__original),.image.is__fitToContent.is__align-right:not(.is__original){align-self:center}}.question.is__imageQuestion .answer .image.is__fitToContent{--size:cover;isolation:auto}.image.is__fitToModule{--size:contain}.image.is__fillModule{--size:cover}@media only screen and (max-width:991px){.image.is__fillModule{--position:center}}.image.is__inFlow{flex:initial;width:100%}span.image.is__inFlow{width:auto}.image.is__inFlow.col.has__emptySibling{flex-basis:0}@media only screen and (max-width:991px){.image.is__bleed{min-height:.45rem}.module.switcher .image.is__bleed,.spread.is__mobileSticky .image.is__bleed,.spread:not(.has__singlePage) .page .image.is__bleed{min-height:0}.image.is__bleed.is__bleedBottom.has__caption,.module.has__caption .image.is__bleed.is__bleedBottom{margin-bottom:0!important}}@media only screen and (min-aspect-ratio:1/1) and (max-width:991px){.page.has__bleed:not(.is__sticky) .image.is__bleed{min-height:1rem}.page.has__bleed:not(.is__sticky) .image.is__bleed[data-bleed*=top][data-bleed*=bottom]{min-height:auto}}.image.is__bleedLeft,.image.is__bleedRight{--size:auto 100%}.image.is__bleedLeft.is__bleedBottom,.image.is__bleedLeft.is__bleedTop,.image.is__bleedRight.is__bleedBottom,.image.is__bleedRight.is__bleedTop{--size:cover}.image.is__bleedBottom,.image.is__bleedTop{--size:100% auto}.image.is__bleedLeft{background-position-x:100%}.image.is__bleedRight{background-position-x:0}.image.is__bleedLeft.is__bleedRight{background-position-x:50%}.image.is__bleedTop{background-position-y:100%}.image.is__bleedBottom{background-position-y:0}.image.is__bleedTop.is__bleedBottom{background-position-y:50%}@media only screen and (max-width:991px){.is__mobileOverhead .image.is__bleed{min-width:100%}.is__mobileOverhead .image.is__bleed.is__bleedTop.is__bleedBottom{background-position-y:0}.image.is__bleedLeft.is__bleedRight{--size:cover;background-position-x:0}}.image.is__sticky{position:sticky;top:0}.image.is__panoramicWide.is__panoramicWide.is__panoramicWide{--size:auto 100%;background-position-x:0;background-position-y:center}.spread.is__loaded .image.is__panoramic,.spread.is__loaded .image.is__panoramicLeft,.spread.is__loaded .image.is__panoramicRight,.spread.is__loaded .image.is__panoramicWide{will-change:background-position-x}.image.gutter__fTC.has__sidenote{margin-bottom:0}span.image{display:inline-block;flex:initial}@media only screen and (max-width:991px){span.image{--position:center}}.image-cut,.image.is__cutOffBelow:before{background:linear-gradient(180deg,rgba(255,255,255,0),rgba(255,255,255,.8));bottom:0;height:7px;left:0;position:absolute;right:0}.spread.is__invertColors .image-cut,.spread.is__invertColors .image.is__cutOffBelow:before{background:linear-gradient(180deg,rgba(0,0,0,0),rgba(0,0,0,.2))}.img{display:flex;flex-shrink:0;height:auto;max-width:100%}@supports (-moz-appearance:none){.image-gifDouble{image-rendering:auto}}.image-gifDouble{background-position:inherit;background-repeat:inherit;background-size:inherit;bottom:0;image-rendering:optimizeQuality;left:0;position:absolute;right:0;top:0;z-index:-1}.image.is__pixelated .image-gifDouble{image-rendering:optimizeSpeed;image-rendering:pixelated}.image-spacer{pointer-events:none}.image-img,.image-in{border-radius:inherit;inset:0;position:absolute!important}.image-in:empty{display:none}.image-img{height:100%;margin:0!important;-o-object-fit:var(--size,contain);object-fit:var(--size,contain);-o-object-position:var(--position,center);object-position:var(--position,center);padding:inherit!important;width:100%;z-index:-1}.image-img:not([src]){visibility:hidden}@media only screen and (min-aspect-ratio:1/1) and (max-width:991px){.image.is__fullWidthOnHorizontalMobile,.image.is__fullWidthOnMobileHorizontal{min-width:calc(100vw - var(--leftPagePaddingMobile)*2)}.image.is__halfWidthOnHorizontalMobile,.image.is__halfWidthOnMobileHorizontal{align-self:flex-start;max-width:calc(50vw - var(--leftPagePaddingMobile) - 12px)}}.notFoundImage{background:rgba(243,245,244,1);color:rgb(227,0,22);color:var(--errorColor,rgb(227,0,22));flex:1!important;font-family:Bureausans,Arial,sans-serif;font-size:14px;justify-content:center;line-height:1.2;text-align:center}.is__mobileOverhead .page_top.page_top.page_top{bottom:.55rem;height:.45rem;margin-bottom:.55rem;min-height:.45rem;padding-bottom:20px;top:0;z-index:100}.is__mobileOverhead .page_top.page_top.page_top .page-in{position:relative}.is__mobileOverhead .page_top.page_top.page_top .page-in:after{border-bottom:var(--overheadRulerThickness,var(--rulerThickness,.5px)) solid transparent;bottom:-20px;content:"";left:-.3em;position:absolute;right:-.3em;transition:border-color .4s ease;z-index:10000}@media only screen and (min-aspect-ratio:1/1) and (max-width:991px){.is__mobileOverhead .page_top.page_top.page_top .page-in:after{display:none!important}}.is__cuttedOff.is__mobileOverhead .page_top.page_top.page_top .page-in:after,.is__halfhold.is__mobileOverhead .page_top.page_top.page_top .page-in:after{border-color:var(--rulerColor,#000)}.is__invertColors.is__cuttedOff.is__mobileOverhead .page_top.page_top.page_top .page-in:after,.is__invertColors.is__halfhold.is__mobileOverhead .page_top.page_top.page_top .page-in:after{border-color:var(--rulerColorInverted,rgba(255,255,255,.5))}.is__cuttedOff.is__mobileOverhead .page_top.page_top.page_top .page-in:after{transition:none!important}.is__mobileOverhead .page_top.page_top.page_top.is__cutOffBelow .page-in:before{background:linear-gradient(180deg,rgba(255,255,255,0),rgba(255,255,255,.8));bottom:-20px;content:"";height:7px;left:0;position:absolute;right:0;z-index:10000}.spread.is__invertColors.is__mobileOverhead .page_top.page_top.page_top.is__cutOffBelow .page-in:before{background:linear-gradient(180deg,rgba(0,0,0,0),rgba(0,0,0,.2))}@media only screen and (min-aspect-ratio:1/1) and (max-width:991px){.is__mobileOverhead .page_top.page_top.page_top.is__cutOffBelow .page-in:before{display:none}}.is__mobileOverhead .page_top.page_top.page_top.has__noOverflowHidden.is__cutOffBelow .page-in:before,.is__mobileOverhead .page_top.page_top.page_top.is__noRuler.is__cutOffBelow .page-in:before{display:none}.is__mobileOverhead .page_top.page_top.page_top.is__noBottomMargin .page-in:after{bottom:0}.is__mobileOverhead .page_top.page_top.page_top.has__background .page-in:after,.is__mobileOverhead .page_top.page_top.page_top.is__bleed .page-in:after{left:-4.1666666667vw;right:-4.1666666667vw}.is__mobileOverhead .page_top.page_top.page_top.is__noRuler .page-in:after,.is__mobileOverhead .page_top.page_top.page_top.is__skipRuler .page-in:after{border-color:transparent!important}.is__mobileOverhead .page_top.page_top.page_top.is__ruler .page-in:after{border-color:var(--rulerColor,#000);transition:none}.is__invertColors.is__mobileOverhead .page_top.page_top.page_top.is__ruler .page-in:after{border-color:var(--rulerColorInverted,rgba(255,255,255,.5))}.is__mobileOverhead .page_top.page_top.page_top .module{min-height:0}.is__mobileOverhead .page_bottom{margin-top:-.55rem}@media only screen and (min-aspect-ratio:1/1) and (max-width:991px){.is__mobileOverhead .page_bottom{padding-top:50px!important}}@media only screen and (max-aspect-ratio:1/1) and (max-width:991px){.is__mobileOverhead .page_bottom{padding-top:40px!important}}.is__mobileOverhead .spread-holder.is__mobileSlow{max-height:1rem;position:sticky;top:0}.is__mobileOverhead .spread-holder.is__mobileSlow .is__slow,.is__mobileOverhead .spread-holder.is__mobileSlow .is__sticky{margin:0;position:static}.is__mobileOverhead .page_bottom.page_bottom.page_bottom.is__slow{height:.55rem}@media only screen and (min-aspect-ratio:1/1){.is__mobileOverhead .page_bottom.page_bottom.page_bottom.is__slow{height:1rem!important}}.is__mobileOverhead .is__sticky .switcher{margin-bottom:0}@media only screen and (min-aspect-ratio:1/1){.is__mobileOverhead .page_top.page_top.page_top{bottom:0!important;height:1rem!important;margin-bottom:0!important;min-height:1rem!important;min-width:50vw;padding-bottom:60px!important;padding-right:12px;right:50vw;width:50vw}.is__mobileOverhead .page_top.page_top.page_top.is__mobileRight{margin-right:0;padding-left:12px;padding-right:4.1666666667vw;right:0}@supports(padding:max(0px)){.is__mobileOverhead .page_top.page_top.page_top.is__mobileRight{padding-right:max(4.1666666667vw,calc(20px + env(safe-area-inset-left)))}}.is__mobileOverhead .page_bottom.page_bottom.page_bottom{margin-top:0!important;min-width:50vw;padding-left:12px;width:50vw}.is__mobileOverhead .page_bottom.page_bottom.page_bottom.is__mobileLeft{order:-1;padding-left:4.1666666667vw;padding-right:12px}@supports(padding:max(0px)){.is__mobileOverhead .page_bottom.page_bottom.page_bottom.is__mobileLeft{padding-left:max(4.1666666667vw,calc(20px + env(safe-area-inset-left)))}}.is__mobileOverhead .page-in:after{background-color:transparent!important}}.is__mobileOverhead .is__sticky .row.is__fitToContent{margin-bottom:20px}.is__mobileOverhead .is__sticky .row.is__fitToContent.has__caption{margin-bottom:0}.is__mobileOverhead.device__mobile .page.is__defaultRuler .page-in:after{left:-.3em!important;right:-.3em!important}.is__mobileOverhead.device__mobile .page.is__noMargins{padding:0!important}.is__mobileOverhead .page_top.page_top.page_top.is__noMargins .page-in:after{bottom:0}.is__mobileOverhead .page_top.is__withCutOffBelow{padding-bottom:0!important}.is__mobileOverhead .page_top.page_top.page_top.is__withCutOffBelow .page-in:after{bottom:0}.is__mobileOverhead .page_top .panoramicImageWrapper.is__bleedSides{margin-left:-4.1666666667vw;margin-right:-4.1666666667vw}@media only screen and (min-aspect-ratio:1/1){@supports(padding:max(0px)){.is__mobileOverhead .page_top.is__mobileLeft .panoramicImageWrapper.is__bleedSides{--leftPagePadding:max(4.1666666667vw,calc(20px + env(safe-area-inset-left)));margin-left:calc(var(--leftPagePadding)*-1)}.is__mobileOverhead .page_top.is__mobileRight .panoramicImageWrapper.is__bleedSides{--rightPagePadding:max(4.1666666667vw,calc(20px + env(safe-area-inset-left)));margin-right:calc(var(--rightPagePadding)*-1)}}}@media only screen and (max-aspect-ratio:1/1){.is__mobileOverhead .page_top .panoramicImageWrapper{margin-top:-50px}}.nav{-webkit-font-smoothing:subpixel-antialiased;font-smoothing:subpixel-antialiased;-webkit-tap-highlight-color:rgba(0,0,0,0);font-size:14px}@media only screen and (max-width:991px){.nav.is__templates{display:none!important}}.nav-overlay{background:#000;height:1.3rem;left:0;opacity:0;position:fixed;top:-.25rem;transform:translateY(-999999px);transition:opacity .4s ease,transform 0s .8s;width:100%;z-index:9999}.is__mobile .nav-overlay{background:#888;height:899999px;position:absolute;top:0}.is__visible .nav-overlay{opacity:.6;transform:translateY(0);transition-delay:0s}.is__mobile .is__visible .nav-overlay{opacity:1}.nav-box{background:#f9f6e5;border-radius:10px 10px 0 0;display:flex;flex-direction:column;height:calc(100vh - 50px);height:calc(100lvh - 50px);left:50px;min-width:892px;pointer-events:none;position:fixed;top:50px;transform:translateY(2.1rem);transition:transform .4s ease;width:calc(100vw - 100px);z-index:9999}.is__visible .nav-box{pointer-events:auto;transform:translateY(0);transition-delay:0s}@media only screen and (max-width:991px){.nav-box{height:calc(100vh - 10px);height:calc(100lvh - 10px);left:0;min-width:0;top:10px;width:100%}}.is__mobile .nav-box{height:calc(100vh - 10px);height:calc(100lvh - 10px);left:0;min-width:0;top:10px;width:100%}.nav-header-wrap{position:relative}.is__visible .nav-header-wrap:after{border-bottom:1px solid rgba(0,0,0,.06);bottom:-1px;content:"";left:0;position:absolute;right:0;z-index:1}.nav-header{background:rgba(255,255,255,.8);border-radius:10px 10px 0 0;display:none;font-family:Bureausans,Arial,sans-serif;font-size:18px}@media only screen and (max-width:991px){.nav-header{align-items:baseline;display:flex;justify-content:space-between;padding:12px 4.1666666667vw 7px}}.nav-header button{-webkit-appearance:none;-moz-appearance:none;appearance:none;background:transparent;border:none;border-radius:3px;cursor:pointer;display:inline-block;line-height:1;margin:0;outline:none;padding:0 9px}.nav-tabs{font-size:0;position:relative;top:-2px}.nav-tabs button{border:1px solid #e5e5e5;border-radius:0;border-right-width:0;font-size:16px;height:27px;min-width:60px;padding:5px 9px 4px;position:relative;touch-action:manipulation}.nav-tabs button:first-child{border-radius:3px 0 0 3px}.nav-tabs button:last-child{border-radius:0 3px 3px 0;border-right-width:1px}.nav-tabs button:first-child:last-child{display:none}@media screen and (max-width:374px){.nav-tabs button span{display:none}}.nav.is__showbookmarks:not(.has__shown-search-results) .nav-show-bookmarks,.nav.is__showcontents:not(.has__shown-search-results) .nav-show-toc,.nav.is__showpreviews:not(.has__shown-search-results) .nav-show-previews{background-color:#000;border-color:#000;color:#fff;margin-right:-1px;position:relative;z-index:2}@media screen and (max-width:374px){.nav-show-toc{vertical-align:bottom}.nav-show-toc:before{content:"";-webkit-mask:url('data:image/svg+xml;utf8,') no-repeat 49% 50%;mask:url('data:image/svg+xml;utf8,') no-repeat 49% 50%}.is__showcontents:not(.has__shown-search-results) .nav-show-toc:before{background-color:#fff}}.nav-show-previews{vertical-align:bottom}.nav-show-previews:before{content:"";-webkit-mask:url('data:image/svg+xml;utf8,') no-repeat 50% 50%;mask:url('data:image/svg+xml;utf8,') no-repeat 50% 50%}.is__showpreviews:not(.has__shown-search-results) .nav-show-previews:before{background-color:#fff}.nav-show-previews:before,.nav-show-toc:before{background-color:#000;bottom:2px;left:0;-webkit-mask-size:auto 11px;mask-size:auto 11px;position:absolute;right:1px;top:0}.nav-show-bookmarks:before{content:"πŸ”–Β "}.nav-close.nav-close{color:#fcc033;font-size:18px;margin-right:-9px;position:relative}.nav-search{background:#f9f6e5;border-radius:10px 10px 0 0;color:rgba(0,0,0,.15);display:flex;flex:0 0 auto;font-size:52px;height:78px;padding:9px 10px 1px 22px}@media only screen and (max-width:991px){.nav-search{background:rgba(255,255,255,.8)!important;border-radius:0;font-family:Bureausans,Arial,sans-serif;font-size:18px;height:57px;line-height:1.25;padding:10px 4.1666666667vw 11px}}.nav-search.is__enabled{background:#fff;color:#1a2028}.is__visible .nav-search{transform:translateZ(0)}.nav-search:before{color:rgba(0,0,0,.3);content:"πŸ”";display:inline-block;font-size:50px;margin-right:10px;transition:color .4s ease}@media only screen and (max-width:991px){.nav-search:before{display:none}}.nav-search.can__clear-search:before{color:#1a2028}.nav-search-field{-webkit-appearance:none!important;-moz-appearance:none!important;appearance:none!important;border:none;flex:1;margin:0;outline:none;padding:0 54px 6px 0}.nav-search-field::-moz-placeholder{color:rgba(0,0,0,.3)}.nav-search-field::placeholder{color:rgba(0,0,0,.3)}@media only screen and (max-width:991px){.nav-search-field{background-color:rgba(0,0,0,.07);border-radius:10px;height:12px;padding:12px 24px 12px 12px;width:100%}}.nav-search-field-clear{-webkit-appearance:none!important;-moz-appearance:none!important;appearance:none!important;background:transparent;border:none;box-shadow:none;color:#1a2028;display:none;height:46px;line-height:1;margin:0;outline:none;padding:0;position:absolute;right:22px;text-decoration:none;top:19px;touch-action:manipulation;width:40px}@media only screen and (max-width:991px){.nav-search-field-clear{box-sizing:content-box;height:17px;padding:9px;right:calc(4.16667vw + 1px);top:11px;width:16px}}.can__clear-search .nav-search-field-clear{display:inline-block}.is__loading .nav-search-field-clear{animation:spin 1s ease-in 1}.is__still-loading .nav-search-field-clear{animation:spin-clone .5s linear infinite}.is__loaded .nav-search-field-clear{animation:spin-another-clone 1s ease-out 1}.nav-content{background:inherit;display:flex;flex:1;min-height:0;transform:translateY(999999px)}.is__visible .nav-content{transform:none}.nav-side{background:inherit;border-right:1px solid rgba(0,0,0,.06);display:flex;flex:0 0 auto;flex-direction:column;margin-top:1px;padding:11px 0 0;width:269px}@media only screen and (max-width:991px){.nav-side{margin-top:0;padding:0;width:100%}.has__shown-search-results .nav-side,.is__showbookmarks .nav-side,.is__showpreviews .nav-side{left:-99999px;position:absolute;visibility:hidden}}.nav-preview,.nav-search-results{background:inherit;flex:1;overflow-y:auto;padding:14px 45px 0;position:relative;visibility:hidden}.nav-preview.is__sortable,.nav-search-results.is__sortable{display:flex;overflow:visible;padding:0}.is__visible .nav-preview,.is__visible .nav-search-results{-webkit-overflow-scrolling:touch;visibility:visible}@media only screen and (max-width:991px){.nav-preview,.nav-search-results{padding-left:4.1666666667vw;padding-right:4.1666666667vw}}.has__shown-search-results .nav-preview{left:-99999px;position:absolute;visibility:hidden}@media only screen and (max-width:991px){.nav-preview{min-width:100vw}.nav.is__visible:not(.is__showpreviews):not(.is__showbookmarks) .nav-preview{left:-99999px;position:absolute;visibility:hidden}}.nav-search-results{display:none;padding-top:19px}.nav-preview.is__sortable .nav-search-results{overflow:auto;padding:19px 45px}.is__visible .nav-preview.is__sortable .nav-search-results{-webkit-overflow-scrolling:touch}.has__shown-search-results .nav-search-results{display:block}.has__shown-search-results .nav-preview.is__sortable .nav-search-results{display:flex}.nav-search-results.is__loading:after{animation:spin .5s linear infinite;background:#000;content:"";height:40px;left:50%;margin-left:-20px;margin-top:-20px;position:absolute;top:50%;width:40px}.nav-search-results-placeholder{color:rgba(0,0,0,.15);display:none;font-family:Bureausans,Arial,sans-serif;font-size:43px;left:0;line-height:45px;padding:0 1.25em;position:absolute;right:0;text-align:center;top:50%;transform:translateY(-100%)}@media only screen and (max-width:991px){.nav-search-results-placeholder{top:25%}}.nav-search-results-placeholder{display:block;opacity:0;z-index:-1}.has__blank-search-results .nav-search-results-placeholder{opacity:1;transition:opacity .4s ease;z-index:auto}.nav-previews-section:last-child{padding-bottom:60px}.nav-preview-bookmarks-placeholder{color:rgba(0,0,0,.15);display:none;font-family:Bureausans,Arial,sans-serif;font-size:43px;left:0;line-height:45px;padding:0 1.25em;position:absolute;right:0;text-align:center;top:50%;transform:translateY(-100%)}@media only screen and (max-width:991px){.nav-preview-bookmarks-placeholder{top:25%}}.nav-preview-bookmarks-placeholder:before{content:"πŸ”–";display:inline-block;margin-left:-.9em;position:absolute}.nav.is__showbookmarks:not(.has__shown-search-results) .has__no-bookmarks .nav-preview-bookmarks-placeholder{display:block}.nav-bookmarks{cursor:pointer;flex:0 0 auto;font-family:Bureausans,Arial,sans-serif;font-size:16px;padding:5px 25px 3px;position:relative;touch-action:manipulation}.nav-bookmarks:hover{color:#fcc033;color:var(--keyColor,#fcc033)}.nav.is__showbookmarks:not(.has__shown-search-results) .nav-bookmarks{background:#f1e5cf}.nav-bookmarks:after{content:"πŸ”–";display:inline-block;font-size:14px;margin-top:1px;position:absolute;right:25px}.nav-bookmarks:before{border-bottom:1px solid #000;bottom:0;content:"";display:block;left:14px;pointer-events:none;position:absolute;right:14px;transform:scaleY(.5);transform-origin:0 0}.nav-bookmarks:hover:before{border-bottom-color:#fcc033;border-bottom-color:var(--keyColor,#fcc033)}@media only screen and (max-width:991px){.nav-bookmarks{display:none}}.nav-contents{background:inherit;flex:1;overflow-y:auto;position:relative;visibility:hidden;z-index:1}.is__visible .nav-contents{-webkit-overflow-scrolling:touch;visibility:visible}.nav-contents-section{margin-bottom:6px}.nav-contents-section:first-child{margin-top:14px}.nav-contents-section:last-child{margin-bottom:24px}@media only screen and (max-width:991px){.nav-contents-section:last-child{margin-bottom:144px}}.nav-contents-section-title{font-feature-settings:"smcp","c2sc";cursor:pointer;font-size:16px;line-height:1.2;margin:0!important;padding:0 25px 3px;touch-action:manipulation}@media only screen and (max-width:991px){.nav-contents-section-title{padding:9px 4.1666666667vw}}.nav-contents-section-chapter{padding:0 25px;position:relative;z-index:1}@media only screen and (max-width:991px){.nav-contents-section-chapter{padding:0 4.1666666667vw}}.nav-contents-section-chapter a{box-shadow:none;display:block;padding:0 0 4px;text-decoration:none;touch-action:manipulation}@media only screen and (max-width:991px){.nav-contents-section-chapter a{padding:0 0 9px}}.nav-contents-section-chapter a:hover{box-shadow:none;color:inherit;text-decoration:none}.nav-contents-section-chapter.is__book-current a:before{content:"β€’";margin-left:-.6em;position:absolute}@media only screen and (max-width:991px){.nav-contents-section-chapter.is__book-current a:before{content:""}}.nav-contents-section-chapter.is__exercise,.nav-contents-section-chapter.is__test{font-feature-settings:"kern" 1;font-style:italic}.nav-contents-section-chapter.is__soon a{color:rgba(0,0,0,.3)}.nav-contents-section-chapter.is__current:after{background:#f1e5cf;bottom:3px;content:"";display:block;left:0;position:absolute;right:0;top:-3px;z-index:-1}@media only screen and (max-width:991px){.nav-contents-section-chapter.is__current:after{background:transparent}}.has__shown-search-results .nav-contents-section-chapter.is__current:after{display:none}@media only screen and (max-width:991px){.nav-contents-section-chapter.is__book-current:after{background:#f1e5cf;bottom:6px;content:"";display:block;left:0;position:absolute;right:0;top:-3px;z-index:-1}}.nav-previews-section-title{font-feature-settings:"smcp","c2sc";margin-top:0}.nav.is__showbookmarks .nav-previews-section-chapter{display:none}.nav.is__showbookmarks .nav-previews-section-chapter.is__bookmarked{display:block}.nav-previews-section-chapter-title{font-family:Bureausans,Arial,sans-serif;font-size:16px;margin:3px 0 5px!important}.nav-previews-section-chapter-spreads{margin-left:-8px;overflow:hidden}.nav-previews-section-spread{display:inline-flex;height:88px;margin-bottom:24px;margin-left:8px;opacity:1!important;position:relative}@media only screen and (max-width:991px){.nav-previews-section-spread{height:calc(52.01389vw - 12.84px)!important}@media only screen and (min-aspect-ratio:1/1){.nav-previews-section-spread{height:calc(26.00694vw - 14.98px)!important}}}.nav.is__showbookmarks:not(.has__shown-search-results) .nav-previews-section-spread{display:none}.nav.is__showbookmarks:not(.has__shown-search-results) .nav-previews-section-spread.is__bookmarked{display:inline-block;height:132px}.nav.has__shown-search-results .nav-previews-section-spread{display:inline-block;height:132px;margin-left:0}.can__putCheckmarks .nav-previews-section-spread.is__checkedOnDesktop:after,.can__putCheckmarks .nav-previews-section-spread.is__checkedOnMobile:not(.is__checkedOnDesktop):after,.has__godlikeEnabled .nav-previews-section-spread.is__checkedOnDesktop:after,.has__godlikeEnabled .nav-previews-section-spread.is__checkedOnMobile:not(.is__checkedOnDesktop):after{bottom:.25em;content:"βœ“";left:.5em;position:absolute}.can__putCheckmarks .nav-previews-section-spread.is__checkedOnMobile:not(.is__checkedOnDesktop):after,.has__godlikeEnabled .nav-previews-section-spread.is__checkedOnMobile:not(.is__checkedOnDesktop):after{opacity:.3}.can__putCheckmarks .nav-previews-section-spread.is__checkedOnMobile:before,.has__godlikeEnabled .nav-previews-section-spread.is__checkedOnMobile:before{bottom:.25em;content:"βœ“";left:.8em;position:absolute;z-index:1}body:not(.has__mobileVersion) .can__putCheckmarks .nav-previews-section-spread.is__checkedOnMobile:before,body:not(.has__mobileVersion) .has__godlikeEnabled .nav-previews-section-spread.is__checkedOnMobile:before{display:none}.nav-previews-section-spread-preview{background-color:#fff;background-repeat:no-repeat;background-size:100%;border:1px solid rgba(0,0,0,.015);box-shadow:none;display:inline-block;flex:1;flex-basis:88px;height:88px;max-width:152px;text-decoration:none;touch-action:manipulation;width:152px}.is__disabled .nav-previews-section-spread-preview{pointer-events:none!important}.nav-previews-section-spread-preview.is__manuallyLoaded{background-image:var(--previewSrc)}@media only screen and (max-width:991px){.nav-previews-section-spread-preview.is__manuallyLoaded{background-image:var(--mobilePreviewSrc)}.nav-previews-section-spread-preview{flex-basis:calc(24.30556vw - 6px)!important;height:calc(52.01389vw - 12.84px)!important;max-width:calc(24.30556vw - 6px)!important;width:calc(24.30556vw - 6px)!important}}@media only screen and (max-width:991px){@media only screen and (min-aspect-ratio:1/1){.nav-previews-section-spread-preview{flex-basis:calc(12.15278vw - 7px)!important;height:calc(26.00694vw - 14.98px)!important;max-width:calc(12.15278vw - 7px)!important;width:calc(12.15278vw - 7px)!important}}}.nav-previews-section-spread-preview:hover,.nav-previews-section-spread.is__current .nav-previews-section-spread-preview{border-color:#fcc033;border-color:var(--keyColor,#fcc033);box-shadow:none;text-decoration:none}.nav.has__shown-search-results .nav-previews-section-spread-preview,.nav.is__showbookmarks:not(.has__shown-search-results) .is__bookmarked .nav-previews-section-spread-preview{flex-basis:132px;height:132px;max-width:228px;width:228px}.nav-previews-section-spread-preview-inner{background-repeat:no-repeat;background-size:100%;bottom:1px;left:1px;position:absolute;right:1px;top:1px}.can__putCheckmarks .nav-previews-section-spread-preview-inner,.has__godlikeEnabled .nav-previews-section-spread-preview-inner{opacity:.3}.nav:not(.is__templates) .is__disabled .nav-previews-section-spread-preview-inner{opacity:.3!important}.can__putCheckmarks .is__checkedOnMobile.is__checkedOnDesktop .nav-previews-section-spread-preview-inner,.has__godlikeEnabled .is__checkedOnMobile.is__checkedOnDesktop .nav-previews-section-spread-preview-inner{opacity:1}.nav-previews-section-spread-preview-number{font-feature-settings:"smcp","c2sc";font-size:.9em;padding-top:.15em;position:absolute;right:0;top:100%}.nav.has__shown-search-results .search-result .nav-previews-section-spread-preview-number{display:none}.nav-previews-section-spread-preview-adds{display:flex;flex-flow:column wrap;height:88px;width:0}.nav-previews-section-spread-preview-add{display:flex;flex:initial;margin-bottom:10px;margin-left:10px;max-height:100%;max-width:50px}.search-result{border-bottom:1px solid rgba(0,0,0,.06);display:flex;font-size:14px;line-height:1.2;margin:0 0 19px;padding:0 0 14px}.search-result:last-child{border-bottom:none}.search-result .best-match{color:#fcc033;color:var(--keyColor,#fcc033)}.search-result-header{font-family:Bureausans,Arial,sans-serif;font-size:14px;line-height:1.15;margin:0;padding:0}.search-result-excerpts{font-feature-settings:"liga" 1,"kern" 1;flex:1;margin-top:-2px;padding:0 16px}.search-result-excerpts p{margin:0 0 .35em;text-indent:0}.search-result-excerpts .match{font-feature-settings:"kern" 1;font-style:italic}@media only screen and (max-width:991px){.search-result-excerpts{-webkit-hyphens:none;hyphens:none;padding-right:0}@media only screen and (min-aspect-ratio:1/1){.search-result-excerpts{padding-right:50%}}}@keyframes spin{0%{transform:rotate(0deg)}to{transform:rotate(1turn)}}@keyframes spin-clone{0%{transform:rotate(0deg)}to{transform:rotate(1turn)}}@keyframes spin-another-clone{0%{transform:rotate(0deg)}to{transform:rotate(1turn)}}.navigatorPreview{display:inline-flex;height:88px;margin-bottom:24px;margin-right:8px;position:relative;width:152px}.nav.is__templates .navigatorPreview.is__disabled{opacity:1!important}@media only screen and (max-width:991px){.navigatorPreview{height:calc(52.01389vw - 12.84px)!important;width:calc(24.30556vw - 6px)!important}}.navigatorPreview.is__big{height:132px;width:228px}.navigatorPreview.is__active:after{background:#fcc033;background:var(--keyColor,#fcc033);bottom:-5px;content:"";margin:0 3px;position:absolute;top:-5px;width:2px}.navigatorPreview.is__active.has__leftClone:after{right:100%}.navigatorPreview.is__active.has__rightClone:after{left:100%}.navigatorPreview.is__active.is__dragged:after{content:normal}.navigatorPreview.is__clone{cursor:grabbing;position:fixed;-webkit-user-select:none;-moz-user-select:none;user-select:none;z-index:100000}.navigatorPreview.is__checkedOnDesktop:after,.navigatorPreview.is__checkedOnMobile:not(.is__checkedOnDesktop):after{bottom:.25em;content:"βœ“";left:.5em;position:absolute}.navigatorPreview.is__checkedOnMobile:not(.is__checkedOnDesktop):after{opacity:.3}.navigatorPreview.is__checkedOnMobile:before{bottom:.25em;content:"βœ“";left:.8em;position:absolute;z-index:1}body:not(.has__mobileVersion) .navigatorPreview.is__checkedOnMobile:before{display:none}.navigatorPreview-link{background-color:#fff;border:1px solid rgba(0,0,0,.015);box-shadow:none;cursor:pointer;display:inline-block;flex:1;text-decoration:none;touch-action:manipulation}.navigatorPreview-link:hover,.navigatorPreview.is__current .navigatorPreview-link{border-color:#fcc033;border-color:var(--keyColor,#fcc033);box-shadow:none;text-decoration:none}.navigatorPreview.is__clone .navigatorPreview-link{border-color:transparent;box-shadow:0 0 3px rgba(0,0,0,.3);transform:rotate(-6deg)}.navigatorPreview.is__dragged .navigatorPreview-link{border:1px dashed #fcc033;border:1px dashed var(--keyColor,#fcc033)}.navigatorPreview.is__dragged.is__active .navigatorPreview-link{background:rgba(252,192,51,.15)!important}.navigatorPreview-inner{background-color:#fff;background-repeat:no-repeat;background-size:100%;display:block;height:100%}.navigatorPreview-inner.is__visible{background-image:var(--previewSrc)}@media only screen and (max-width:991px){.navigatorPreview-inner.is__visible{background-image:var(--mobilePreviewSrc)}}.can__putCheckmarks .navigatorPreview-inner,.has__godlikeEnabled .navigatorPreview-inner{opacity:.3}.can__putCheckmarks .is__checkedOnMobile.is__checkedOnDesktop .navigatorPreview-inner,.has__godlikeEnabled .is__checkedOnMobile.is__checkedOnDesktop .navigatorPreview-inner,.nav.is__templates .navigatorPreview-inner{opacity:1}.navigatorPreview.is__clone .navigatorPreview-inner{opacity:1!important}.navigatorPreview.is__dragged .navigatorPreview-inner{background:none!important;opacity:1}.navigatorPreview-number{font-feature-settings:"smcp","c2sc";font-size:.9em;padding-top:.15em;position:absolute;right:0;top:100%}.nav.has__shown-search-results .search-result .navigatorPreview-number{display:none}.navigatorPreviews{display:flex;min-height:100%;position:relative}.navigatorPreviews.is__loading{filter:grayscale(100%);opacity:.5;pointer-events:none}.nav.is__showbookmarks .navigatorPreviews,.navigatorPreviews.is__bookmarks{display:none}.nav.is__showbookmarks .navigatorPreviews.is__bookmarks{display:flex}.navigatorPreviews-box{flex:1;overflow-y:auto;padding:14px 45px;position:relative;-webkit-user-select:none;-moz-user-select:none;user-select:none;visibility:hidden}.is__visible .navigatorPreviews-box{-webkit-overflow-scrolling:touch;visibility:visible}@media only screen and (max-width:991px){.navigatorPreviews-box{padding-left:4.1666666667vw;padding-right:4.1666666667vw}}.navigatorPreviews-title{font-family:Bureausans,Arial,sans-serif;font-size:16px;margin:3px 0 5px!important}.navigatorPreviews-spreads{margin-right:-8px}.navigatorPreviews-placeholder{color:rgba(0,0,0,.15);font-family:Bureausans,Arial,sans-serif;font-size:40px;left:0;position:absolute;right:0;text-align:center;top:50%;transform:translateY(-100%)}.navigatorPreviews-placeholder:before{content:"πŸ”–";display:inline-block;margin-right:.1em}.notification{background:#fed030;font-family:Bureausans,Arial,sans-serif;font-size:16px;left:0;line-height:18px;padding:11px;position:fixed;right:0;top:0;width:100%;z-index:10000}.notification i{font-family:Icons;font-style:normal}.page{background:inherit;background-position:50%;background-repeat:no-repeat;background-size:cover;border-width:0;overflow:hidden}@media only screen and (max-aspect-ratio:1/1) and (max-width:991px){.page{-webkit-flex-basis:100%}}.page.is__halfTitle{--linkColor:#fff;background:#fcc033;background:var(--keyColor,#fcc033);color:#fff}@media only screen and (max-width:991px){.page.is__halfTitle .page-in{flex-grow:1;justify-content:space-between}.page.is__halfTitle.page_right{flex-direction:column-reverse}}.is__soon .page.is__halfTitle{opacity:.3}@media only screen and (max-width:991px){.is__service .page .page-in{flex-grow:1;justify-content:space-between}.is__service .page.with__contents{min-height:1rem}.is__service .page.with__contents .page-in{justify-content:flex-start}.is__service .page.with__contents .is__ghost{flex-basis:auto;flex-grow:0}.page.is__bleed,.page.is__noFitToContentOnMobile{min-height:1rem}.page.has__bleed{min-height:.45rem}.spread.has__singlePage .page.has__bleed{min-height:1rem}}.page.has__bleed .image.is__bleed{z-index:0}.page.has__bleed .image.is__bleed.is__gifImage{z-index:auto}.page.has__bleed h1,.page.has__bleed h2,.page.has__bleed h3,.page.has__bleed ol,.page.has__bleed p,.page.has__bleed ul{position:relative;z-index:1}.page.has__bleed .is__switcherItem.is__firstChild{will-change:opacity}.page.is__align-distribute .page-in{justify-content:space-between}.page.is__align-distribute .page-in>.module{flex:initial}.page.is__align-distribute .page-in>.module:last-child{justify-content:flex-end}.page.is__sticky{width:16.6666666667vw}@media only screen and (max-width:991px){.page.is__sticky{width:165.1666666667px}}.page.is__sticky{height:1rem;min-height:600px;position:sticky;top:0}@media only screen and (min-aspect-ratio:1/1) and (max-width:991px){.image .page.is__sticky{min-height:100vh;min-height:100lvh}}.page.is__sticky .page-in{height:.75rem}@media only screen and (max-width:991px){.page.is__sticky .page-in{max-height:100%}}.page.is__sticky.page_bottom .page-in{height:auto}.page.is__sticky:after,.page.is__sticky:before{content:"";display:table}.page.is__heightAuto{height:auto}.page.is__slow{display:block;height:1rem;overflow:hidden!important;position:sticky;top:0}.page.is__slow .page-in{min-height:100%}.page.is__slow .page-in>.module{position:relative}.page.is__slow .page-in>.module.sidenote{position:static}.page.is__slow .page-in>.rows{display:flex}.spread.is__test .page{z-index:3}.page.page_bottom.is__sticky{border-top:2.5em solid transparent;height:1rem;margin-bottom:1.5em;margin-top:-1rem;top:-1.5em}.page.page_bottom.is__sticky.is__halfsticky{top:0}.page.page_bottom.is__sticky.is__halfsticky .page-in{margin-bottom:0}.page.page_bottom.is__sticky .page-in{margin-bottom:-1.5em}.page.page_bottom.is__sticky.is__half{border-top-width:1em;margin-bottom:0;top:0}.page.page_bottom.is__sticky.is__half .page-in{margin-bottom:0}.page.grid__proportional{padding:.06rem 2.7777777778vw .1rem}.page.grid__proportional.page_left{padding-right:1.3888888889vw}@media only screen and (max-width:991px){.page.grid__proportional.page_left{padding-right:13.7638888889px}}.page.grid__proportional.page_right{padding-left:1.3888888889vw}@media only screen and (max-width:991px){.page.grid__proportional.page_right{padding-left:13.7638888889px}}.page.grid__proportional.is__noMargins{flex-basis:4.1666666667vw;padding:0}@media only screen and (max-width:991px){.page.grid__proportional.is__noMargins{flex-basis:calc(2.77778vw + 13.76389px)}}.page.grid__proportional.is__noTopMargin{padding-top:0!important}.page.grid__proportional.is__noBottomMargin{padding-bottom:0!important}.page.grid__proportional.is__noLeftMargin{padding-left:0!important}.page.grid__proportional.is__noLeftMargin.page_left{flex-basis:1.3888888889vw}@media only screen and (max-width:991px){.page.grid__proportional.is__noLeftMargin.page_left{flex-basis:13.7638888889px}}.page.grid__proportional.is__noLeftMargin.page_right{flex-basis:2.7777777778vw}.page.grid__proportional.is__noRightMargin{padding-right:0!important}.page.grid__proportional.is__noRightMargin.page_left{flex-basis:2.7777777778vw}.page.grid__proportional.is__noRightMargin.page_right{flex-basis:1.3888888889vw}@media only screen and (max-width:991px){.page.grid__proportional.is__noRightMargin.page_right{flex-basis:13.7638888889px}}.page.grid__column.page_left{left:0;padding-left:calc(2.77778vw - 10px)}.page.grid__column.page_right{padding-right:calc(2.77778vw - 10px);right:0}.page.grid__column.is__noLeftMargin{padding-left:0}.page.grid__column.is__noRightMargin{padding-right:0}@media only screen and (max-width:991px){.page.grid__column.has__background:not(.is__sticky){position:relative}}.is__noHeaderMoveUp .page.grid__proportional .page-in,.is__soon .page.grid__proportional .page-in{padding-top:0}.is__noHeaderMoveUp .page.grid__column .page-in,.is__soon .page.grid__column .page-in{margin-top:0}@media only screen and (max-width:991px){.spread.device__mobile .page{min-width:100vw;padding:50px 4.1666666667vw 60px}.spread.device__mobile .page.is__noMargins{padding:0!important}.spread.device__mobile .page.is__noTopMargin{padding-top:0!important}.spread.device__mobile .page.is__noRightMargin{padding-right:0!important}.spread.device__mobile .page.is__noBottomMargin{padding-bottom:0!important}.spread.device__mobile .page.is__noLeftMargin{padding-left:0!important}@media only screen and (min-aspect-ratio:1/1){@supports(padding:max(0px)){.spread.device__mobile .page{padding-left:max(4.1666666667vw,calc(20px + env(safe-area-inset-left)));padding-right:max(4.1666666667vw,calc(20px + env(safe-area-inset-left)))}}}.spread.device__mobile.is__halfTitle .page.is__halfTitle+.page.is__halfTitle,.spread.device__mobile:not(.is__service) .page:not(.is__halfTitle)+.page{padding-top:20px}.spread.device__mobile.is__halfTitle .page.is__halfTitle:not(:last-child),.spread.device__mobile:not(.is__service) .page:not(:last-child):not(.is__lastChild):not(.is__halfTitle){padding-bottom:20px}.page.is__mobileFullHeight{min-height:1rem}}@media only screen and (min-aspect-ratio:1/1) and (max-width:991px){.spread:not(.is__mobileOverhead):not(.is__test) .page:not(.is__halfTitle){padding-right:calc(30vw + 12px)}}.page-in{background:inherit;display:flex;flex:1;flex-flow:column;position:relative}.page.is__bleed .page-in{background:none}.page.is__halfsticky .page-in{display:block;height:100%!important}.page.grid__column .page-in{margin-top:1.55em;padding:.06rem 2.7777777778vw .1rem}.page.grid__proportional .page-in{padding-top:1.55em}@media only screen and (max-width:991px){.page.grid__proportional .page-in{padding-top:0}}.page.grid__column.page_left .page-in,.page.grid__column.page_right .page-in{margin-left:10px;margin-right:10px;padding-left:0;padding-right:0}.page.grid__column.is__noMargins .page-in{padding:0!important}.page.grid__column.is__noTopMargin .page-in{padding-top:0!important}.page.grid__column.is__noRightMargin .page-in{margin-right:0!important;padding-right:0!important}.page.grid__column.is__noBottomMargin .page-in{padding-bottom:0!important}.page.grid__column.is__noLeftMargin .page-in{margin-left:0!important;padding-left:0!important}.page.grid__column.page_left.is__noMargins .page-in{margin-left:calc(-2.77778vw + 10px)}.page.grid__column.page_right.is__noMargins .page-in{margin-right:calc(-2.77778vw + 10px)}.page-transformation{background:inherit;display:flex;flex:1;flex-flow:column;margin:-18px 0;min-height:calc(100% + 36px);padding:18px 0;position:relative;width:100%}.spread.is__visible .page-transformation{will-change:transform}.page.is__halfsticky{overflow:visible}.is__invertable-slave{display:none}.page.is__inverted .is__invertable-slave{display:flex}.page.is__inverted .is__invertable-master{display:none}.page.is__vertical-tv{display:block;flex:none!important;min-height:0!important;overflow:visible;padding:0;position:relative;position:sticky;width:100%;z-index:10}.page.is__vertical-tv .page-in{left:2.7777777778vw}@media only screen and (max-width:991px){.page.is__vertical-tv .page-in{left:27.5277777778px}}.page.is__vertical-tv .page-in{right:2.7777777778vw}@media only screen and (max-width:991px){.page.is__vertical-tv .page-in{right:27.5277777778px}}.page.is__vertical-tv .page-in{height:100%!important;margin-left:-.3em;margin-right:-.3em;min-height:0;padding-bottom:40px;position:absolute;width:auto!important}.mendeleevSpread .page.is__vertical-tv .page-in,.page.is__vertical-tv .page-in.is__noBottomMargin,.page.is__vertical-tv .page-in.is__noMargins{padding-bottom:0!important}.spread.is__doubleUnderneath .page.is__vertical-tv .page-in{height:auto!important;left:auto;margin-left:2.7777777778vw;position:relative;right:auto}@media only screen and (max-width:991px){.spread.is__doubleUnderneath .page.is__vertical-tv .page-in{margin-left:27.5277777778px}}.spread.is__doubleUnderneath .page.is__vertical-tv .page-in{margin-right:2.7777777778vw}@media only screen and (max-width:991px){.spread.is__doubleUnderneath .page.is__vertical-tv .page-in{margin-right:27.5277777778px}}.page.is__vertical-tv .page-in:after{border-bottom:var(--overheadRulerThickness,var(--rulerThickness,.5px)) solid transparent;bottom:0;content:"";height:var(--overheadRulerThickness,var(--rulerThickness,.5px));left:0;position:absolute;transition:border-color .4s ease;width:100%;z-index:10000}.spread.is__doubleUnderneath .page.is__vertical-tv{height:auto}.page.is__vertical-tv.page_top .page-in{border-top:.06rem solid transparent;padding-bottom:20px}.spread.is__doubleUnderneath .page.is__vertical-tv.page_top .page-in{padding-bottom:40px}.page.is__vertical-tv.page_top.grid__column .page-in{padding-left:0;padding-right:0;padding-top:0}.page.is__vertical-tv.page_top.is__noBottomMargin .page-in,.page.is__vertical-tv.page_top.is__noMargins{padding-bottom:0}.page.is__vertical-tv.page_bottom .page-in{border-bottom:.1666666667rem solid transparent;padding-top:2.5em}.spread.is__doubleUnderneath.is__halfhold.has__overflown .page.is__vertical-tv .page-in:after,.spread.is__tripleOverhead.is__vertical.is__halfhold.has__overflown .page.is__vertical-tv .page-in:after{border-color:var(--rulerColor,#000)}.spread.is__doubleUnderneath.is__halfhold.has__overflown .page.is__vertical-tv.is__noRuler .page-in:after,.spread.is__tripleOverhead.is__vertical.is__halfhold.has__overflown .page.is__vertical-tv.is__noRuler .page-in:after{border:none}.spread.is__doubleUnderneath.is__halfhold.is__invertColors.has__overflown .page.is__vertical-tv .page-in:after,.spread.is__tripleOverhead.is__vertical.is__invertColors.is__halfhold.has__overflown .page.is__vertical-tv .page-in:after{border-color:var(--rulerColorInverted,rgba(255,255,255,.5))}.page.is__vertical-half,.page.is__vertical-main{border-color:transparent;border-style:solid;margin-top:-1rem}.page.is__vertical-half.page_bottom,.page.is__vertical-main.page_bottom{padding-top:20px}.page.is__vertical-half.page_top,.page.is__vertical-main.page_top{padding-bottom:0}.page.is__vertical-half.grid__column .page-in,.page.is__vertical-main.grid__column .page-in{padding-top:0}.page.is__vertical-half.is__slow,.page.is__vertical-main.is__slow{margin-bottom:0;top:0}.page.is__vertical-half.page_bottom.is__sticky{border-top:20px solid transparent;margin-bottom:0;top:0}.page.is__vertical-half.page_bottom.is__sticky .page-in{margin-bottom:0}.spread.is__doubleUnderneath .page_top{margin-bottom:auto}.spread.is__doubleUnderneath .page_bottom{min-width:100%;padding-top:0}.spread.is__doubleUnderneath .page_bottom .page-in{justify-content:flex-end;padding-top:0}.page-background{background:inherit;background-position:50%;background-repeat:no-repeat;background-size:cover;bottom:0;left:0;position:absolute;right:0;top:0;z-index:-1}.page_left .page-background{right:10px}.page_right .page-background{left:10px}@media only screen and (max-aspect-ratio:1/1) and (max-width:991px){.page-background{left:0!important;right:0!important}}.page.has__noOverflowHidden{overflow:visible}.page.has__stickies h1,.page.has__stickies h2,.page.has__stickies h3{position:relative;z-index:2}.page.has__stickies table h1,.page.has__stickies table h2,.page.has__stickies table h3{position:static}@media only screen and (max-width:991px){.spread.device__mobile .page.has__tvbox{padding-top:30px!important}}@media only screen and (max-aspect-ratio:1/1) and (max-width:991px){.spread.device__mobile .page.page.page.page.has__tvbox{padding-bottom:0;padding-left:calc(4.16667vw - .3em);padding-right:calc(4.16667vw - .3em)}}.pageNumber{align-items:flex-end;border-bottom:.8666666667em solid transparent;display:flex;font-size:14px;height:.1666666667rem;line-height:1.2;padding-bottom:.0833333333rem;position:absolute;right:2.7777777778vw;top:calc(100% - .1rem);z-index:30}@media only screen and (max-width:991px){.pageNumber{bottom:0;height:60px;padding-bottom:0;right:4.1666666667vw;top:auto}}@media only screen and (min-aspect-ratio:1/1) and (max-width:991px){.is__mobileLeft .pageNumber{opacity:0}.spread:not(.is__mobileOverhead) .page.grid__proportional .page-transformation .pageNumber{right:calc(-25.83333vw - 12px)}.spread .page.grid__proportional .page-transformation .pageNumber{right:calc(4.16667vw - var(--leftPagePaddingMobile))}}@media only screen and (max-aspect-ratio:1/1) and (max-width:991px){.is__mobileOverhead .page_top .pageNumber{opacity:0}.is__mobileOverhead .page_bottom .page-transformation .pageNumber{right:0}}.spread.is__noPageNumber .pageNumber,.spread.is__soon .pageNumber{display:none}.page.grid__proportional .page-transformation .pageNumber{right:0;top:calc(100% - 18px)}.page.grid__column .page-transformation .pageNumber{top:calc(100% - .1rem - 18px)}.page.page_right.grid__column .page-transformation .pageNumber{right:10px}@media only screen and (max-aspect-ratio:1/1) and (max-width:991px){.spread.device__mobile.is__noPageNumber.is__pageNumberOnVerticalMobile .pageNumber{display:flex}}.pageNumber-text{background-color:transparent}.spreadNumber{height:100%;position:absolute;right:2.7777777778vw;top:0;z-index:100}.spreadNumber-in{height:1rem;position:sticky;top:0}.spreadNumber-in .pageNumber{right:0}.revertical.spread.is__loaded .spread-holder{flex-direction:column}.revertical.spread.is__loaded.is__slim .spread-holder{justify-content:center}.revertical.is__slim .revertical-sticky{flex:initial;margin-top:0!important;order:2;padding-top:40px!important;position:static}.revertical.is__slim .revertical-sticky .revertical-captions .caption{display:none}.revertical.is__slim .revertical-main{margin-bottom:0!important;margin-top:0;order:1;position:relative!important;top:0}.revertical.is__slim .revertical-main .caption{display:block}.revertical.is__slim .revertical-items{display:flex}.revertical .page{width:100%}.revertical .page.is__sticky{height:auto;min-height:0;padding-top:0;width:100%;z-index:1}.revertical .page.is__sticky .page-in{height:auto}.revertical .revertical-main{margin-top:-1rem;top:1rem}.revertical .revertical-main.grid__column .page-in,.revertical .revertical-main.grid__proportional{padding-bottom:0}.revertical-main{flex:none;margin-left:-100vw;order:2}.spread.is__visible .revertical-main{margin-left:0;position:absolute}body.is__resizing .spread.is__loaded .revertical-main{position:relative}.revertical-main .cols{background:inherit}.revertical-sticky{flex:none;order:1}.revertical-sticky.page.page_bottom.is__sticky{border:0;height:auto;margin:0;top:0}.revertical-sticky.page.page_bottom.is__sticky .page-in{margin-bottom:0;padding-top:0}.revertical-items{display:block}.revertical-item{margin-bottom:40px}.revertical-item.is__lastChild,.revertical-item:last-child{margin-bottom:0}.revertical-item.is__last .caption{display:none}.revertical-captions{left:2.7777777778vw}@media only screen and (max-width:991px){.revertical-captions{left:27.5277777778px}}.revertical-captions{right:2.7777777778vw}@media only screen and (max-width:991px){.revertical-captions{right:27.5277777778px}}.revertical-captions{margin-top:0;position:absolute;top:0}.revertical-captions .caption{left:0;margin-bottom:40px!important;margin-top:calc(.73333em + 3px);opacity:0;padding-left:.3em;padding-right:.3em;padding-top:0;position:absolute;top:1px;transition:opacity .4s ease;width:100%}.revertical-captions .caption.is__active{opacity:1;z-index:1}.revertical-ruler{border-top:var(--overheadRulerThickness,var(--rulerThickness,.5px)) solid var(--rulerColor,#000);margin-left:-.3em;margin-right:-.3em}.is__invertColors .revertical-ruler{border-top-color:var(--rulerColorInverted,rgba(255,255,255,.5))}.revertical-ruler.is__finished{border-top-color:transparent}.rows{flex-flow:column}.row.is__empty,.row:last-child:not(.is__bleedBottom):not(.caption):not(.is__opticalMargin){margin-bottom:0!important}.row.rowsGutter__cols,.row.rowsGutter__cols-auto{margin-bottom:20px}.row.rowsGutter__auto,.row.rowsGutter__rows{margin-bottom:40px}.row.rowsGutter__example{margin-bottom:1.25em}.row.rowsGutter__h2MarginBottom,.row.rowsGutter__h2marginBottom{margin-bottom:18px}.row.rowsGutter__p,.row.rowsGutter__paragraph{margin-bottom:16.5px}.row.rowsGutter__caption{margin-bottom:.7333333333em}.rule{font-feature-settings:"kern" 1;font-size:1.6em;font-style:italic}.textNode+.rule.is__fitToContent{margin-top:23.5px}@media only screen and (min-aspect-ratio:1/1) and (max-width:991px){.spread:not(.is__mobileOverhead) .rule{min-width:calc(100vw - var(--leftPagePaddingMobile)*2)}}.rule-in{margin-bottom:-.375em;margin-left:-.07em;margin-top:-.4375em;text-align:center}.rule-in p{margin:0!important}@media only screen and (max-width:991px){.rule-in{margin-left:-.08em}.module.is__fitToContent.is__firstChild.rule-in{margin-top:-.4375em}.module.is__fitToContent.is__lastChild.rule-in{margin-bottom:-.375em}}:root{--browserColor:#ebebeb;--browserAddressColor:#000;--browserDotsColor:#fff;--browserBorderColor:rgba(0,0,0,.08);--browserAddressFontSize:16px}.browser.is__iphone10{margin:0 -1.028%}.browser-frame,.browser-viewport,.browser-wrapper{display:flex;flex:0 1 auto}.browser-wrapper{overflow:hidden;position:relative}.browser.is__desktop .browser-wrapper{background-color:var(--browserBorderColor);background-image:none;border:1px solid transparent;border-radius:6px}@media only screen and (max-width:991px){.browser.is__desktop .browser-wrapper{border-radius:4px}}.browser.is__desktop .browser-wrapper:hover{background-image:none}.is__noBorder .browser.is__desktop .browser-wrapper{--browserBorderColor:transparent;border:none}.is__shadow .browser.is__desktop .browser-wrapper{box-shadow:0 30px 60px rgba(0,0,0,.05),0 10px 80px rgba(0,0,0,.05)}.browser.is__iphone10 .browser-wrapper{margin-bottom:17.3%;overflow:visible}.browser.is__mobile .browser-wrapper{overflow:visible}.browser.is__ipad .browser-frame,.browser.is__iphone .browser-frame,.browser.is__iphone10 .browser-frame{background-color:var(--browserColor);margin:.745%;overflow:hidden;position:relative}.browser.is__ipad .browser-frame,.browser.is__iphone10 .browser-frame{margin:0}.browser.is__parallaxed .browser-frame{height:0}.browser.is__parallaxed .browser-content{position:absolute;width:100%}.browser.is__iphone.has__text .browser-content{margin:20px 9px 30px!important}.browser.is__iphone10.has__text .browser-content{margin:63px 9px 54px!important}.browser.is__desktop .browser-content .embiframe,.browser.is__desktop .browser-content .is__demo,.browser.is__desktop .browser-content .is__switcherItem,.browser.is__desktop .browser-content .media,.browser.is__desktop .browser-content .switcherItem-in{border-radius:0 0 5px 5px}@media only screen and (max-width:991px){.browser.is__desktop .browser-content .embiframe,.browser.is__desktop .browser-content .is__demo,.browser.is__desktop .browser-content .is__switcherItem,.browser.is__desktop .browser-content .media,.browser.is__desktop .browser-content .switcherItem-in{border-radius:0 0 3px 3px}}.is__headOverlay .browser.is__desktop .browser-content .embiframe,.is__headOverlay .browser.is__desktop .browser-content .is__demo,.is__headOverlay .browser.is__desktop .browser-content .is__switcherItem,.is__headOverlay .browser.is__desktop .browser-content .media,.is__headOverlay .browser.is__desktop .browser-content .switcherItem-in{border-radius:5px}@media only screen and (max-width:991px){.is__headOverlay .browser.is__desktop .browser-content .embiframe,.is__headOverlay .browser.is__desktop .browser-content .is__demo,.is__headOverlay .browser.is__desktop .browser-content .is__switcherItem,.is__headOverlay .browser.is__desktop .browser-content .media,.is__headOverlay .browser.is__desktop .browser-content .switcherItem-in{border-radius:3px}}.browser-viewport{overflow:hidden;position:relative;z-index:1}.browser-viewport .media{margin:0!important}.browser-viewport .image{--size:cover}.browser.is__desktop .browser-viewport{margin:0}.browser.is__ipad .browser-viewport{margin:15.7% 6.37%}.browser.is__iphone .browser-viewport{margin:21.32% 4.37% 23.6% 4.46%}.browser.is__iphone10 .browser-viewport{margin:4.5% 5.74% -12.6%}.browser.is__imac .browser-viewport,.browser.is__mobile .browser-viewport{margin:0}.browser.is__imac .browser-viewport .image-spacer{aspect-ratio:396/230}.browser-top{height:92%;overflow:hidden;position:absolute;width:100%;z-index:10}.browser-top svg{width:100%}.browser.is__iphone10 .browser-top{height:100%}.browser.is__ipad .browser-top{height:90%}.browser.is__desktop .browser-top{background-color:var(--browserColor);height:inherit;max-height:40px;position:relative;width:100%}.is__headBorder .browser.is__desktop .browser-top:after{border-bottom:1px solid var(--browserBorderColor);bottom:0;content:"";position:absolute;width:100%}.is__headOverlay .browser.is__desktop .browser-top{background-color:transparent;position:absolute}.browser.is__imac .browser-top{height:100%}.browser.is__mobile .browser-top{height:100%;overflow:visible}.browser-bottom{bottom:0;left:1.1385%;overflow:hidden;position:absolute;right:1.1385%;z-index:10}.browser.is__iphone10 .browser-bottom{bottom:auto;left:0;right:0;top:100%}.browser.is__ipad .browser-bottom{left:0;right:0}.browser.is__mobile .browser-bottom{height:100%;left:0;width:100%;z-index:0}.is__shadow .browser.is__mobile .browser-bottom{overflow:visible}.browser.is__imac .browser-bottom{display:flex;flex-direction:column;left:0;position:static;right:0;width:100%}.browser-address{bottom:0;color:var(--browserAddressColor);font-family:Bureausans,Arial,sans-serif;font-size:var(--browserAddressFontSize);height:1em;left:0;line-height:1;position:absolute;right:0;text-align:center;top:calc(50% - var(--browserAddressFontSize)/2);white-space:nowrap;z-index:1}@media only screen and (max-width:991px){.browser-address{display:none}}.browser.width50 .browser-address,.screenshot.width50 .browser-address{display:none}.is__iphone10 .browser-address{font-size:1.4vw;top:7.7%}@media only screen and (max-width:991px){.is__iphone10 .browser-address{display:block;font-size:3.1vw}}.browser-header{padding-bottom:4.74%}.browser-dots{align-items:center;display:flex;height:100%;left:0;max-width:80px;position:absolute;top:0;width:9.45%}.browser-dots svg{fill:none}.browser-dots circle{fill:var(--browserDotsColor);r:7px}body.is__ready .browser-mask rect{height:calc(100% - 1px);width:calc(100% - 1px)}body.is__ready .browser.is__imac .browser-mask rect{height:77.3%}.browser-border{left:0;overflow:visible!important;position:absolute;top:0}.browser-border rect{fill:none;stroke:var(--browserBorderColor);vector-effect:non-scaling-stroke;height:calc(100% - 1px);width:calc(100% - 1px)}.is__noBorder .browser-border rect{stroke:none}.browser-shadow{filter:drop-shadow(0 10px 35px rgba(0,0,0,.08));left:1px;overflow:visible!important;position:absolute;top:1px;transform:translateZ(0)}.browser-shadow rect{fill:#000;height:calc(100% - 3px);width:calc(100% - 3px)}.screenshot:not(.is__shadow) .browser-shadow{display:none}.browser-monitor{fill:var(--browserColor);height:auto;width:calc(100% - .5px)}.is__withMonitorIndent .browser-monitor{margin-top:1px}.browser-basement{fill:var(--browserColor);align-self:center;height:auto;margin-top:1px;width:32.8%}.sectionTitle{margin:0 1em;text-align:center}.sectionTitle h1{font-size:3em;margin-bottom:-.25em;margin-top:-.3166666667em}@media only screen and (max-width:991px){.sectionTitle h1{font-size:2em}}.sectionTitle .swash,.sectionTitle swash{display:inline-block;width:.6em}.sectionTitle .is__a-single-word{white-space:nowrap}.sectionTitle-number{display:inline-block;font-size:1.7em;line-height:1.166666667;margin-bottom:-.1274509804em}.sidenote{flex:initial;font-size:14px;line-height:1.2}.sidenote:not(.is__marginal){margin-bottom:40px}.sidenote:last-child{margin-bottom:0!important}.module:not(.gutter__fTC,.rowsGutter__auto,.rowsGutter__rows,.rowsGutter__cols,.sidenote,.caption,.image,.media)+.sidenote{margin-top:40px}.sidenote+.caption,.sidenote+.sidenote{margin-top:calc(1.2em - 40px)}.textNode.has__sidenote+.sidenote{margin-top:0}.media+.sidenote{margin-top:calc(.73333em + 3px)}.sidenote .image{align-self:flex-start}@media only screen and (max-width:991px){.sidenote .image{max-width:70%}}@media only screen and (min-aspect-ratio:1/1) and (max-width:991px){.sidenote .textNode{-webkit-hyphens:none;hyphens:none}.sidenote .image{max-width:calc(50vw - var(--leftPagePaddingMobile) - 12px)}}@media only screen and (max-width:991px){.sidenote+.textNode p{text-indent:0}}.image+.sidenote{margin-top:calc(.73333em + 3px)}.image+.sidenote .sidenote-text{background:inherit}.sidenote .image+.textNode{margin-top:calc(.73333em + 3px)}@media only screen and (max-width:991px){.sidenote .image.module.has__textNode{margin-bottom:0!important}}.with__imageSidenote{flex-direction:row}.with__imageSidenote .sidenote{padding-left:9px}.textBox+.with__endSidenote .sidenote{margin-top:20px}.cols.colsGutter__page+.with__endSidenote .sidenote{margin-top:40px}.media.has__sidenote.gutter__fTC{margin-bottom:0}.skipped{height:100%;left:0;position:absolute;top:0;width:100%}.skipped-content{color:#dcdcdc;cursor:pointer;font:3em/1.125 Bureausans,Arial,sans-serif;-webkit-hyphens:none;hyphens:none;left:50%;position:absolute;text-align:center;top:50%;transform:translate(-50%,-50%);width:70%}@media only screen and (max-width:991px){.skipped-content{font-size:1em}}.skipped-content:before{bottom:100%;content:"πŸ”’";font-size:1.5em;left:50%;position:absolute;transform:translateX(-50%)}@supports not(position:sticky){.spread{overflow:hidden}}.spread{background:#fff;display:flex;margin-bottom:20px;min-height:1rem;min-width:972px;position:relative;z-index:10}.book-wrapper.is__headless .spread{margin-bottom:0}.spread.is__halfTitle{--linkColor:#fff;background:#fcc033;background:var(--keyColor,#fcc033);color:#fff}.spread:last-child{margin-bottom:0}.spread.is__noHeaderMoveUp .search-header,.spread.is__soon .search-header{display:none}.spread.is__invisible{background:none;overflow:visible}.spread.is__invisible .page{padding-top:0}.spread.is__layerBelow{z-index:5}.spread.is__layerAbove{z-index:15}.spread.is__soon{color:#dcdcdc}.spread.is__soon .soonText,.spread.is__soon:after{content:"Π‘ΠΊΠΎΡ€ΠΎ";font:3em/1.125 Bureausans,Arial,sans-serif;left:50%;position:absolute;text-align:center;top:50%;transform:translate(-50%,-50%);width:70%;z-index:1}html[lang=en] .spread.is__soon .soonText,html[lang=en] .spread.is__soon:after{content:"Soon"}.spread.is__soon .soonText{-webkit-hyphens:none;hyphens:none}@media only screen and (max-width:991px){.spread.is__soon .soonText{font-size:1em}}.spread.is__soon.has__soonText:after{content:""!important}.spread.is__soon.is__halfTitle:after{color:rgba(255,255,255,.3)}.spread.is__invertColors{background-color:#000;color:#fff}@media only screen and (max-width:991px){.spread{min-width:100vw}}.spread-holder{background:inherit;contain:strict;contain-intrinsic-height:auto 1rem;contain-intrinsic-width:auto 100%;content-visibility:hidden;display:none;flex:1;flex-flow:row wrap;min-height:1rem;position:relative;visibility:hidden}@media only screen and (max-width:991px){.spread:not(.is__service):not(.is__halfTitle) .spread-holder{align-content:flex-start}.spread.has__bleed.has__bleed .spread-holder{align-content:normal}.spread-holder .spread.is__mobileSticky{max-height:1rem;position:sticky;top:0}}.spread-holder>.image>.image-in{display:flex;flex-flow:row wrap}.spread.is__loaded .spread-holder{contain:none;contain-intrinsic-height:none;contain-intrinsic-width:none;content-visibility:visible;display:flex;z-index:1}.spread.is__loaded .spread-holder.is__insideControls{z-index:25}.spread.is__visible .spread-holder{visibility:visible}.book.is__inFocusMode .spread.is__visible .spread-holder{pointer-events:none;-webkit-user-select:none;-moz-user-select:none;user-select:none}.spread.is__vertical .spread-holder{align-content:flex-start}.spread.is__always-visible .spread-holder{visibility:visible!important}.spread.is__vert .spread-holder{flex-flow:column}.spread.is__ghost{transform:translateX(-99999px)!important}.spread.is__broken{background:#efefef}.spread.is__compiling:after{background:rgba(255,255,255,.95);bottom:0;content:"";display:block;left:0;position:absolute;right:0;top:0}table.is__sticky{margin-top:calc(-.16667em - 9px)}table.is__sticky thead td,table.is__sticky thead th{background-color:var(--backgroundColor,var(--pageBackgroundColor,rgb(255,255,255)));border-bottom:none;padding-top:9px;position:sticky;top:0;z-index:1}.spread.is__invertColors table.is__sticky thead td,.spread.is__invertColors table.is__sticky thead th{background-color:var(--backgroundColor,var(--pageBackgroundColor,rgb(0,0,0)))}table.is__sticky thead td:after,table.is__sticky thead th:after{border-bottom:var(--tableRulerThickness,var(--rulerThickness,.5px)) solid;content:"";left:0;position:absolute;top:100%;width:100%}.switcher,.switcherItem-in{position:relative}.switcherItem-in{height:100%;width:100%}.switcher+.module,.switcher+div{z-index:1}.page.is__vertical-tv .is__switcherItem.is__fader{--compensator:calc(2.77778vw - 0.3em);margin-bottom:-20px;margin-left:calc(var(--compensator)*-1);margin-right:calc(var(--compensator)*-1);padding-bottom:20px;padding-left:var(--compensator);padding-right:var(--compensator)}.page.is__noBottomMargin .switcher.is__lastChild .is__switcherItem.is__fader,.page.is__vertical-tv .is__switcherItem.is__fader.gutter__fTC.is__lastChild,.page.is__vertical-tv .is__switcherItem.is__fader.gutter__fTC:last-child,.page.is__vertical-tv .page-in.is__noMargins .is__switcherItem.is__fader,.page.is__vertical-tv.is__noMargins .is__switcherItem.is__fader,.spread:not(.device__mobile) .page-in.is__noBottomMargin .switcher.is__lastChild .is__switcherItem.is__fader{margin-bottom:0;padding-bottom:0}.cols.grid__column.colsGutter__auto.is__switcherItem.is__fader,.cols.grid__column.colsGutter__normal.is__switcherItem.is__fader{padding-left:0;padding-right:0}.cols.grid__column.colsGutter__auto>.col>.col-in .is__switcherItem.is__fader,.cols.grid__column.colsGutter__normal>.col>.col-in .is__switcherItem.is__fader{margin-left:0;margin-right:0;padding-left:0;padding-right:0}.gutter__fTC.is__lastChild.is__switcherItem.is__fader,.gutter__fTC:last-child.is__switcherItem.is__fader{margin-bottom:-.1666666667rem}@media only screen and (max-width:991px){.gutter__fTC.is__lastChild.is__switcherItem.is__fader,.gutter__fTC:last-child.is__switcherItem.is__fader{margin-bottom:-60px}}.module.is__switcherItem.is__fader.image.image{margin:0;padding:0}.page-in .module:not(.col.is__blank)+.module .switcher .module.is__switcherItem.is__fader,.page-in .module:not(.col.is__blank)+.switcher .module.is__switcherItem.is__fader,.switcher+.switcher .module.is__switcherItem.is__fader{margin-top:0;padding-top:0}.switcher.has__caption .module.is__switcherItem.is__fader.is__lastChild,.switcher.has__caption .module.is__switcherItem.is__fader:last-child{margin-bottom:0;padding-bottom:0}.is__switcherItem.image.is__strikedOut:not(.is__activeRightNow):after{display:none}.is__switcherItem .image.is__gifImage{isolation:auto}.page:not(.is__sticky,.sticky) .switcher.gutter__fTC .module.is__switcherItem.is__fader:not(:last-child,.is__lastChild){margin-bottom:-40px;margin-top:-40px;padding-bottom:40px;padding-top:40px}.answer{cursor:pointer;font-family:Bureausans,Arial,sans-serif;font-size:17px;margin-bottom:3px;padding-bottom:1px;padding-left:20px;padding-top:14px;position:relative;touch-action:manipulation}.answer.is__boxed{background-color:#f3f5f4;color:#000;padding:21px 11px 40px}.answer.is__boxed:first-child{padding-top:21px}.answer:after{background:rgba(0,0,0,.2);bottom:0;content:"";display:block;height:1px;left:20px;pointer-events:none;right:0}.answer:before{margin-left:-1em;position:absolute}.answer.is__checked:before{content:"βœ“"}.answer.is__checked.is__invertControls:before,.answer.is__checked.is__inverted:before{color:#fff}.answer:hover{color:#fcc033;color:var(--keyColor,#fcc033)}.answer:hover:after{background-color:#fcc033;background-color:var(--keyColor,#fcc033)}.book.is__debug .answer.is__correct{outline:1px dotted green}.answer.has__example:not(.is__boxed){color:var(--exampleColor,#000);font-size:16px;margin-top:0!important;padding-top:.23em}.answer.has__example:not(.is__boxed):before{font-size:17px;font-weight:400;top:-2px}.answer.has__example:not(.is__boxed):after{margin-top:.5625em}.answer.has__example .example{color:var(--exampleColor,#000)}.spread:not(.device__mobile) .answer.is__checked.is__invertControls:hover:before,.spread:not(.device__mobile) .answer.is__checked.is__inverted:hover:before{color:#fcc033;color:var(--keyColor,#fcc033)}.is__revealed .answer.is__checked,.is__revealed .answer.is__correct,.is__revealed.answer.is__checked,.is__revealed.answer.is__correct{--exampleColor:var(--incorrectAnswerColor,red);color:red;color:var(--incorrectAnswerColor,red)}.is__revealed .answer.is__checked.is__correct,.is__revealed.answer.is__checked.is__correct{--exampleColor:var(--correctAnswerColor,green);color:green;color:var(--correctAnswerColor,green)}.is__revealed .answer.is__checked:before,.is__revealed.answer.is__checked:before{content:"Γ—"}.is__revealed .answer.is__checked.is__correct:before,.is__revealed .answer.is__correct:before,.is__revealed.answer.is__checked.is__correct:before,.is__revealed.answer.is__correct:before{content:"βœ“"}.is__revealed .answer:hover,.is__revealed.answer:hover{color:#000;cursor:default}.is__revealed .answer.is__checked:hover,.is__revealed .answer.is__correct:hover,.is__revealed.answer.is__checked:hover,.is__revealed.answer.is__correct:hover{--exampleColor:var(--incorrectAnswerColor,red);color:red;color:var(--incorrectAnswerColor,red)}.is__revealed .answer.is__checked.is__correct:hover,.is__revealed.answer.is__checked.is__correct:hover{--exampleColor:var(--correctAnswerColor,green);color:green;color:var(--correctAnswerColor,green)}.is__revealed .answer:hover:after,.is__revealed.answer:hover:after{background:rgba(0,0,0,.2)}.answer.is__standalone.is__revealed:hover .image:after,.test.is__revealed .answer:hover .image:after{border-color:transparent}.answer.is__standalone.is__revealed.is__checked .caption a,.answer.is__standalone.is__revealed.is__correct .caption a,.test.is__revealed .answer.is__checked .caption a,.test.is__revealed .answer.is__correct .caption a{-webkit-text-decoration-color:rgba(255,0,0,.15);text-decoration-color:rgba(255,0,0,.15)}.answer.is__standalone.is__revealed.is__checked.is__correct .caption a,.test.is__revealed .answer.is__checked.is__correct .caption a{-webkit-text-decoration-color:rgba(0,128,0,.15);text-decoration-color:rgba(0,128,0,.15)}.answer.is__standalone.is__revealed .caption.caption a:hover,.test.is__revealed .answer .caption.caption a:hover{-webkit-text-decoration-color:#fcc033;text-decoration-color:#fcc033}.answer.is__standalone.is__revealed.is__checked .image:after,.answer.is__standalone.is__revealed.is__correct .image:after,.test.is__revealed .answer.is__checked .image:after,.test.is__revealed .answer.is__correct .image:after{background:rgba(255,0,0,.05);border-color:red;border-color:var(--incorrectAnswerColor,red)}.answer.is__standalone.is__revealed.is__checked.is__correct .image:after,.test.is__revealed .answer.is__checked.is__correct .image:after{background:rgba(0,255,0,.05);border-color:green;border-color:var(--correctAnswerColor,green)}.question.is__imageQuestion .answer:not(.is__boxed){padding:0}.answer.is__boxed,.question.is__imageQuestion .answer{border:0;margin-bottom:20px;position:relative}.answer.is__boxed:before,.question.is__imageQuestion .answer:before{bottom:6px;left:28px;z-index:1}.answer.is__boxed:after,.question.is__imageQuestion .answer:after{background-color:transparent;border:1px solid transparent;bottom:-1px;box-sizing:border-box;content:"";height:auto;left:-1px;position:absolute;right:-1px;top:-1px;z-index:1}@media (-webkit-min-device-pixel-ratio:1.5),(min-resolution:144dpi){.answer.is__boxed:after,.question.is__imageQuestion .answer:after{border-width:.5px;bottom:-.5px;left:-.5px;right:-.5px;top:-.5px}}.answer.is__boxed.is__checked:after,.question.is__imageQuestion .answer.is__checked:after{border-color:#000}.spread:not(.device__mobile) .answer.is__boxed.is__checked:hover:after,.spread:not(.device__mobile) .answer.is__boxed:hover:after,.spread:not(.device__mobile) .question.is__imageQuestion .answer.is__checked:hover:after,.spread:not(.device__mobile) .question.is__imageQuestion .answer:hover:after{border-color:#fcc033;border-color:var(--keyColor,#fcc033)}.spread:not(.device__mobile) .answer.is__boxed.is__invertControls:hover:after,.spread:not(.device__mobile) .answer.is__boxed.is__inverted:hover:after,.spread:not(.device__mobile) .question.is__imageQuestion .answer.is__invertControls:hover:after,.spread:not(.device__mobile) .question.is__imageQuestion .answer.is__inverted:hover:after{border-color:#f2be22}.spread:not(.device__mobile) .answer.is__boxed.is__invertControls:hover:before,.spread:not(.device__mobile) .answer.is__boxed.is__inverted:hover:before,.spread:not(.device__mobile) .question.is__imageQuestion .answer.is__invertControls:hover:before,.spread:not(.device__mobile) .question.is__imageQuestion .answer.is__inverted:hover:before{color:#fff}.is__revealed .answer.is__boxed:after,.is__revealed .question.is__imageQuestion .answer:after,.is__revealed.answer.is__boxed:after,.is__revealed.question.is__imageQuestion .answer:after{background-color:transparent;border-color:transparent}.is__revealed .answer.is__boxed.is__checked:after,.is__revealed .answer.is__boxed.is__correct:after,.is__revealed .question.is__imageQuestion .answer.is__checked:after,.is__revealed .question.is__imageQuestion .answer.is__correct:after,.is__revealed.answer.is__boxed.is__checked:after,.is__revealed.answer.is__boxed.is__correct:after,.is__revealed.question.is__imageQuestion .answer.is__checked:after,.is__revealed.question.is__imageQuestion .answer.is__correct:after{background:rgba(255,0,0,.05);border-color:red;border-color:var(--incorrectAnswerColor,red)}.is__revealed .answer.is__boxed.is__checked.is__correct:after,.is__revealed .question.is__imageQuestion .answer.is__checked.is__correct:after,.is__revealed.answer.is__boxed.is__checked.is__correct:after,.is__revealed.question.is__imageQuestion .answer.is__checked.is__correct:after{background:rgba(0,255,0,.05);border-color:green;border-color:var(--correctAnswerColor,green)}.spread:not(.device__mobile) .is__revealed .answer.is__boxed:hover:after,.spread:not(.device__mobile) .is__revealed .question.is__imageQuestion .answer:hover:after,.spread:not(.device__mobile) .is__revealed.answer.is__boxed:hover:after,.spread:not(.device__mobile) .is__revealed.question.is__imageQuestion .answer:hover:after{border-color:transparent}.spread:not(.device__mobile) .is__revealed .answer.is__boxed.is__checked:hover:after,.spread:not(.device__mobile) .is__revealed .answer.is__boxed.is__correct:hover:after,.spread:not(.device__mobile) .is__revealed .question.is__imageQuestion .answer.is__checked:hover:after,.spread:not(.device__mobile) .is__revealed .question.is__imageQuestion .answer.is__correct:hover:after,.spread:not(.device__mobile) .is__revealed.answer.is__boxed.is__checked:hover:after,.spread:not(.device__mobile) .is__revealed.answer.is__boxed.is__correct:hover:after,.spread:not(.device__mobile) .is__revealed.question.is__imageQuestion .answer.is__checked:hover:after,.spread:not(.device__mobile) .is__revealed.question.is__imageQuestion .answer.is__correct:hover:after{background:rgba(255,0,0,.05);border-color:red;border-color:var(--incorrectAnswerColor,red)}.spread:not(.device__mobile) .is__revealed .answer.is__boxed.is__checked.is__correct:hover:after,.spread:not(.device__mobile) .is__revealed .question.is__imageQuestion .answer.is__checked.is__correct:hover:after,.spread:not(.device__mobile) .is__revealed.answer.is__boxed.is__checked.is__correct:hover:after,.spread:not(.device__mobile) .is__revealed.question.is__imageQuestion .answer.is__checked.is__correct:hover:after{background:rgba(0,255,0,.05);border-color:green;border-color:var(--correctAnswerColor,green)}.spread:not(.device__mobile) .is__revealed .answer.is__boxed.is__invertControls:hover:after,.spread:not(.device__mobile) .is__revealed .answer.is__boxed.is__inverted:hover:after,.spread:not(.device__mobile) .is__revealed .question.is__imageQuestion .answer.is__invertControls:hover:after,.spread:not(.device__mobile) .is__revealed .question.is__imageQuestion .answer.is__inverted:hover:after,.spread:not(.device__mobile) .is__revealed.answer.is__boxed.is__invertControls:hover:after,.spread:not(.device__mobile) .is__revealed.answer.is__boxed.is__inverted:hover:after,.spread:not(.device__mobile) .is__revealed.question.is__imageQuestion .answer.is__invertControls:hover:after,.spread:not(.device__mobile) .is__revealed.question.is__imageQuestion .answer.is__inverted:hover:after{border-color:transparent}.spread:not(.device__mobile) .is__revealed .answer.is__boxed.is__checked.is__invertControls:hover:after,.spread:not(.device__mobile) .is__revealed .answer.is__boxed.is__checked.is__inverted:hover:after,.spread:not(.device__mobile) .is__revealed .answer.is__boxed.is__correct.is__invertControls:hover:after,.spread:not(.device__mobile) .is__revealed .answer.is__boxed.is__correct.is__inverted:hover:after,.spread:not(.device__mobile) .is__revealed .question.is__imageQuestion .answer.is__checked.is__invertControls:hover:after,.spread:not(.device__mobile) .is__revealed .question.is__imageQuestion .answer.is__checked.is__inverted:hover:after,.spread:not(.device__mobile) .is__revealed .question.is__imageQuestion .answer.is__correct.is__invertControls:hover:after,.spread:not(.device__mobile) .is__revealed .question.is__imageQuestion .answer.is__correct.is__inverted:hover:after,.spread:not(.device__mobile) .is__revealed.answer.is__boxed.is__checked.is__invertControls:hover:after,.spread:not(.device__mobile) .is__revealed.answer.is__boxed.is__checked.is__inverted:hover:after,.spread:not(.device__mobile) .is__revealed.answer.is__boxed.is__correct.is__invertControls:hover:after,.spread:not(.device__mobile) .is__revealed.answer.is__boxed.is__correct.is__inverted:hover:after,.spread:not(.device__mobile) .is__revealed.question.is__imageQuestion .answer.is__checked.is__invertControls:hover:after,.spread:not(.device__mobile) .is__revealed.question.is__imageQuestion .answer.is__checked.is__inverted:hover:after,.spread:not(.device__mobile) .is__revealed.question.is__imageQuestion .answer.is__correct.is__invertControls:hover:after,.spread:not(.device__mobile) .is__revealed.question.is__imageQuestion .answer.is__correct.is__inverted:hover:after{background:rgba(255,0,0,.05);border-color:red;border-color:var(--incorrectAnswerColor,red)}.spread:not(.device__mobile) .is__revealed .answer.is__boxed.is__correct.is__checked.is__invertControls:hover:after,.spread:not(.device__mobile) .is__revealed .answer.is__boxed.is__correct.is__checked.is__inverted:hover:after,.spread:not(.device__mobile) .is__revealed .question.is__imageQuestion .answer.is__correct.is__checked.is__invertControls:hover:after,.spread:not(.device__mobile) .is__revealed .question.is__imageQuestion .answer.is__correct.is__checked.is__inverted:hover:after,.spread:not(.device__mobile) .is__revealed.answer.is__boxed.is__correct.is__checked.is__invertControls:hover:after,.spread:not(.device__mobile) .is__revealed.answer.is__boxed.is__correct.is__checked.is__inverted:hover:after,.spread:not(.device__mobile) .is__revealed.question.is__imageQuestion .answer.is__correct.is__checked.is__invertControls:hover:after,.spread:not(.device__mobile) .is__revealed.question.is__imageQuestion .answer.is__correct.is__checked.is__inverted:hover:after{background:rgba(0,255,0,.05);border-color:green;border-color:var(--correctAnswerColor,green)}.answer.is__boxed{margin-top:0!important}.answer.is__boxed:last-child{margin-bottom:0}.answer.is__boxed.has__explanation{margin-bottom:0!important}.question.is__standalone.is__revealed .answer.is__boxed.is__checked.is__correct:after{background:rgba(0,255,0,.05)!important;border-color:green!important;border-color:var(--correctAnswerColor,green)!important}.question.is__standalone.is__revealed .answer.is__boxed.is__correct:not(.is__checked){--exampleColor:#000}.question.is__standalone.is__revealed .answer.is__boxed.is__correct:not(.is__checked):after{background-color:transparent!important}.question.is__imageQuestion .answer.has__imageWithCaption:before{content:""!important}.question.is__imageQuestion .answer.has__imageWithCaption .image:before{bottom:6px;content:"";left:28px;margin-left:-1em;position:absolute;z-index:1}.question.is__imageQuestion .answer.has__imageWithCaption:after{background-color:transparent!important;border-color:transparent!important}.question.is__imageQuestion .answer.has__imageWithCaption .image:after{background-color:transparent;border:1px solid transparent;bottom:-1px;box-sizing:border-box;content:"";height:auto;left:-1px;position:absolute;right:-1px;top:-1px;z-index:1}@media (-webkit-min-device-pixel-ratio:1.5),(min-resolution:144dpi){.question.is__imageQuestion .answer.has__imageWithCaption .image:after{border-width:.5px;bottom:-.5px;left:-.5px;right:-.5px;top:-.5px}}.question.is__imageQuestion .answer.has__imageWithCaption.is__checked .image:after{border-color:#000}.question.is__imageQuestion .answer.has__imageWithCaption.is__checked .image:before{content:"βœ“"}.question.is__imageQuestion .answer.has__imageWithCaption.is__checked.is__invertControls .image:before,.question.is__imageQuestion .answer.has__imageWithCaption.is__checked.is__inverted .image:before{color:#fff}.question.is__imageQuestion .answer.has__imageWithCaption.is__checked:hover .image:after,.question.is__imageQuestion .answer.has__imageWithCaption:hover .image:after{border-color:#fcc033;border-color:var(--keyColor,#fcc033)}.question.is__imageQuestion .answer.has__imageWithCaption:hover .caption.caption a{-webkit-text-decoration-color:rgba(252,192,51,.15);text-decoration-color:rgba(252,192,51,.15)}.question.is__imageQuestion .answer.has__imageWithCaption:hover .caption.caption a:hover{-webkit-text-decoration-color:#fcc033;text-decoration-color:#fcc033}.question.is__imageQuestion .answer.has__imageWithCaption.without__hover:hover{color:#000}.question.is__imageQuestion .answer.has__imageWithCaption.without__hover:hover .image:after{border-color:transparent}.question.is__imageQuestion .answer.has__imageWithCaption.without__hover.is__checked:hover .image:after{border-color:#000}.is__revealed .question.is__imageQuestion .answer.has__imageWithCaption:after,.is__revealed.question.is__imageQuestion .answer.has__imageWithCaption:after{background-color:transparent!important}.is__revealed .question.is__imageQuestion .answer.has__imageWithCaption .image:after,.is__revealed.question.is__imageQuestion .answer.has__imageWithCaption .image:after{border-color:transparent}.is__revealed .question.is__imageQuestion .answer.has__imageWithCaption.is__checked .image:after,.is__revealed .question.is__imageQuestion .answer.has__imageWithCaption.is__correct .image:after,.is__revealed.question.is__imageQuestion .answer.has__imageWithCaption.is__checked .image:after,.is__revealed.question.is__imageQuestion .answer.has__imageWithCaption.is__correct .image:after{background:rgba(255,0,0,.05);border-color:red;border-color:var(--incorrectAnswerColor,red)}.is__revealed .question.is__imageQuestion .answer.has__imageWithCaption.is__checked.is__correct .image:after,.is__revealed.question.is__imageQuestion .answer.has__imageWithCaption.is__checked.is__correct .image:after{background:rgba(0,255,0,.05);border-color:green;border-color:var(--correctAnswerColor,green)}.is__revealed .question.is__imageQuestion .answer.has__imageWithCaption.without__hover:hover,.is__revealed.question.is__imageQuestion .answer.has__imageWithCaption.without__hover:hover{color:#000}.is__revealed .question.is__imageQuestion .answer.has__imageWithCaption.without__hover.is__checked:hover,.is__revealed .question.is__imageQuestion .answer.has__imageWithCaption.without__hover.is__correct:hover,.is__revealed.question.is__imageQuestion .answer.has__imageWithCaption.without__hover.is__checked:hover,.is__revealed.question.is__imageQuestion .answer.has__imageWithCaption.without__hover.is__correct:hover{--exampleColor:var(--incorrectAnswerColor,red);color:red;color:var(--incorrectAnswerColor,red)}.is__revealed .question.is__imageQuestion .answer.has__imageWithCaption.without__hover.is__checked.is__correct:hover,.is__revealed.question.is__imageQuestion .answer.has__imageWithCaption.without__hover.is__checked.is__correct:hover{--exampleColor:var(--correctAnswerColor,green);color:green;color:var(--correctAnswerColor,green)}.spread:not(.device__mobile) .is__revealed .question.is__imageQuestion .answer.has__imageWithCaption:hover .image:after,.spread:not(.device__mobile) .is__revealed.question.is__imageQuestion .answer.has__imageWithCaption:hover .image:after{border-color:transparent}.spread:not(.device__mobile) .is__revealed .question.is__imageQuestion .answer.has__imageWithCaption.is__checked:hover .image:after,.spread:not(.device__mobile) .is__revealed .question.is__imageQuestion .answer.has__imageWithCaption.is__correct:hover .image:after,.spread:not(.device__mobile) .is__revealed.question.is__imageQuestion .answer.has__imageWithCaption.is__checked:hover .image:after,.spread:not(.device__mobile) .is__revealed.question.is__imageQuestion .answer.has__imageWithCaption.is__correct:hover .image:after{background:rgba(255,0,0,.05);border-color:red;border-color:var(--incorrectAnswerColor,red)}.spread:not(.device__mobile) .is__revealed .question.is__imageQuestion .answer.has__imageWithCaption.is__checked.is__correct:hover .image:after,.spread:not(.device__mobile) .is__revealed.question.is__imageQuestion .answer.has__imageWithCaption.is__checked.is__correct:hover .image:after{background:rgba(0,255,0,.05);border-color:green;border-color:var(--correctAnswerColor,green)}.is__revealed .question.is__hideAnswer .answer.is__correct,.is__revealed.question.is__hideAnswer .answer.is__correct{color:initial}.is__revealed .question.is__hideAnswer .answer.is__correct.is__checked,.is__revealed.question.is__hideAnswer .answer.is__correct.is__checked{--exampleColor:var(--correctAnswerColor,green);color:green;color:var(--correctAnswerColor,green)}.is__revealed .question.is__hideAnswer .answer.is__correct:before,.is__revealed.question.is__hideAnswer .answer.is__correct:before{content:""}.is__revealed .question.is__hideAnswer .answer.is__correct.is__invertControls:after,.is__revealed .question.is__hideAnswer .answer.is__correct.is__invertControls:hover:after,.is__revealed .question.is__hideAnswer .answer.is__correct.is__inverted:after,.is__revealed .question.is__hideAnswer .answer.is__correct.is__inverted:hover:after,.is__revealed .question.is__hideAnswer .answer.is__correct:after,.is__revealed .question.is__hideAnswer .answer.is__correct:hover:after,.is__revealed.question.is__hideAnswer .answer.is__correct.is__invertControls:after,.is__revealed.question.is__hideAnswer .answer.is__correct.is__invertControls:hover:after,.is__revealed.question.is__hideAnswer .answer.is__correct.is__inverted:after,.is__revealed.question.is__hideAnswer .answer.is__correct.is__inverted:hover:after,.is__revealed.question.is__hideAnswer .answer.is__correct:after,.is__revealed.question.is__hideAnswer .answer.is__correct:hover:after{border-color:transparent!important}.is__revealed .question.is__hideAnswer .answer.is__correct.is__checked:before,.is__revealed.question.is__hideAnswer .answer.is__correct.is__checked:before{content:"βœ“"}.module.rowsGutter__compact .answer{position:relative}.module.rowsGutter__compact .answer.is__checked{z-index:1}.module.rowsGutter__compact .answer:nth-child(2n){margin-left:-1px}.spread:not(.device__mobile) .module.rowsGutter__compact .answer:hover{z-index:2}.is__revealed .module.rowsGutter__compact .answer.is__checked,.is__revealed .module.rowsGutter__compact .answer.is__correct,.is__revealed.module.rowsGutter__compact .answer.is__checked,.is__revealed.module.rowsGutter__compact .answer.is__correct{z-index:4}.is__revealed .module.rowsGutter__compact .answer.is__checked.is__correct,.is__revealed.module.rowsGutter__compact .answer.is__checked.is__correct{z-index:3}.test .col-in.has__boxedAnswer,.test .col-in.has__boxedAnswer .answer.is__boxed,.test .col.has__boxedAnswer,.test .col.has__boxedAnswer .answer.is__boxed{flex:1}.question.is__imageQuestion .cols .answer{margin-bottom:0}.question{flex:initial;margin-bottom:.0833333333rem}@media only screen and (min-aspect-ratio:1/1) and (max-width:991px){.question{margin-bottom:40px}}@media only screen and (max-aspect-ratio:1/1) and (max-width:991px){.question .module.col:empty{margin-left:-10px;max-width:0}.question .cols.is__transposeOnVerticalMobile:not(.has__answerImage):not(.has__boxedAnswer):not(.has__example){margin-bottom:0}.question .cols.is__transposeOnVerticalMobile:not(.colsGutter__compact) .col-in.has__answerImage:not(.has__boxedAnswer),.question .cols.is__transposeOnVerticalMobile:not(.colsGutter__compact) .col.has__answerImage:not(.has__boxedAnswer){margin-bottom:20px}.question .cols .cols.is__transposeOnVerticalMobile:not(.colsGutter__compact) .col.has__answerImage.is__lastChild,.question .cols.is__transposeOnVerticalMobile.is__lastChild .col.is__lastChild .col-in.has__answerImage.is__lastChild{margin-bottom:0}}.question .anchor-in>.module{margin-bottom:20px}.question .anchor-in>.module:last-child{margin-bottom:0}.question .cols.with__reflowedCols{flex-wrap:wrap}.question .cols.with__reflowedCols .col:not(.is__firstChild){margin-left:10px}.question .cols.with__reflowedCols .col:not(.is__lastChild){margin-right:10px}@media only screen and (max-aspect-ratio:1/1) and (max-width:991px){.question .cols.with__reflowedCols .col{flex-basis:calc(50% - 10px)}.question .cols.with__reflowedCols .col:not(.is__lastChild):nth-child(2n){margin-bottom:20px;margin-right:0}.question .cols.with__reflowedCols .col:nth-child(odd){margin-left:0}}@media only screen and (min-aspect-ratio:1/1) and (max-width:991px){.question .cols.with__reflowedCols .col{flex-basis:calc(33.33333% - 20px)}.question .cols.with__reflowedCols .col:not(.is__lastChild):nth-child(3n){margin-bottom:20px;margin-right:0}.question .cols.with__reflowedCols .col:nth-child(3n+1){margin-left:0}}.question.is__imageQuestion .cols.colsGutter__compact{flex-wrap:wrap}@media only screen and (max-aspect-ratio:1/1) and (max-width:991px){.question.is__imageQuestion.is__imageQuestion .cols.is__transposeOnVerticalMobile{flex-wrap:nowrap}}.has__questionControl{padding-right:1em;position:relative}@media only screen and (max-width:991px){.question .anchor-in>.cols.is__transposeOnMobile>.col.col:has(.col-in>.answer:not(.has__image)){margin-bottom:14px}.question .anchor-in>.cols.is__transposeOnMobile>.col.col:has(.col-in>.answer:not(.has__image)):last-child{margin-bottom:0}}@media only screen and (max-aspect-ratio:1/1) and (max-width:991px){.question .anchor-in.has__boxedAnswer .cols.is__transposeOnVerticalMobile>.col{margin-bottom:20px}.question .anchor-in.has__boxedAnswer .cols.is__transposeOnVerticalMobile>.col:last-child{margin-bottom:0}.question.is__imageQuestion .anchor-in.has__boxedAnswer>.cols:only-child>.col.has__questionImage.is__lastChild{margin-bottom:20px}.question.is__imageQuestion .anchor-in.has__boxedAnswer>.cols:only-child>.col:not(.has__questionImage){margin-bottom:0}}.question-reset{-webkit-appearance:none;-moz-appearance:none;appearance:none;background:transparent;border:none;display:none;font-size:18px;line-height:18px;outline:none;padding:0 5px;position:absolute;right:-5px;top:11px;touch-action:manipulation}.question-reset:hover{color:#fcc033;color:var(--keyColor,#fcc033)}.is__revealed .question-reset{display:inline-block}.is__revealed.is__wrong .question-reset{color:red;color:var(--incorrectAnswerColor,red)}.is__revealed.is__correct .question-reset{color:green;color:var(--correctAnswerColor,green)}.question.is__standalone{position:relative}.question.is__standalone .caption:first-child{padding-right:20px}.question.is__standalone:last-child{margin-bottom:0}.question.is__standalone.is__imageQuestion.is__revealed.is__hideAnswer &.is__correct:after{background:transparent;border-color:transparent}.question.is__standalone.is__revealed.is__hideAnswer .answer.is__correct{color:initial}.question.is__standalone.is__revealed.is__hideAnswer .answer.is__correct:before{content:""}.question.is__standalone.is__revealed.is__hideAnswer .answer.is__correct.is__checked{color:green;color:var(--correctAnswerColor,green)}.question.is__standalone.is__revealed.is__hideAnswer .answer.is__correct.is__checked:before{content:"βœ“"}.test .anchor{background:none;cursor:auto;margin:0;padding:0}.test .anchor:first-child,.test .anchor:last-child{margin:0}.test .anchor div.not(.sidenote) p:first-child{margin-bottom:0;margin-top:-.45em}.test .anchor div.not(.sidenote) p:last-child{margin-bottom:-.35em}@media only screen and (max-aspect-ratio:1/1) and (max-width:991px){.is__test .module.col{flex-basis:auto;max-width:100%}}.test-result{font-size:30px;margin-bottom:-.4em;margin-top:.0833333333rem;text-align:center}.test-result-pre{display:block;margin-top:-.375em}.test.is__done .test-result-pre{display:none}.test-result-box{display:none;margin-top:-.375em}.test.is__done .test-result-box{display:block}.test-result-arrow{background:#000;height:calc(1rem + 30px);margin:20px auto 26px;position:relative;width:2px}.test-result-arrow:after{background:url('data:image/svg+xml;utf8,');background-size:100% 100%;content:"";font-size:34px;height:29px;left:50%;line-height:1;position:absolute;top:97.9%;transform:translateX(-50%);width:18px}.test-result-box-value{font-size:70px}.test-result-reset{display:inline-block;font-size:15px;margin-top:70px;touch-action:manipulation}.video{cursor:pointer;flex:1;justify-content:center;opacity:0;position:relative;width:100%}.video.is__loop.is__autoplay.is__played{cursor:default}a:hover .video{cursor:pointer!important}.video.is__coverLoaded,.video.is__played{opacity:1}.video .video-spacer{width:100%}.video video{display:block;height:auto;max-height:100%;max-width:100%;-o-object-fit:fill;object-fit:fill;width:100%}.video video:-webkit-full-screen{object-fit:contain}.video.is__fitToContent{align-self:center;flex:1;margin-bottom:0}.video.is__fitToContent.is__align-self-left,.video.is__fitToContent.is__align-self-top{align-self:flex-start}.video.is__fitToContent.is__align-self-bottom,.video.is__fitToContent.is__align-self-right{align-self:flex-end}.video.is__fitToContent.is__original{align-self:stretch}.video.is__fitToContent video{height:100%;left:0;position:absolute;top:0}.video.is__fitToContent .image{--size:cover;--position:initial}.video.is__fitToContent.row{margin-bottom:40px}.module.is__fitToContent .video.is__fitToContent,.video.is__fitToContent.row:last-child{margin-bottom:0}.video .image{bottom:0;left:0;position:absolute;right:0;top:0;z-index:1}.video.is__played .image{display:none}.spread.device__mobile .video .image.is__fitToContent{width:100%!important}.spread.device__mobile.is__visible.is__mobileOverhead .video{align-self:flex-start}.video-play{color:#fff;display:block;font:130px/1 Bureausans,Arial,sans-serif;height:100px;left:50%;position:absolute;text-shadow:0 0 83px rgba(0,0,0,.27);top:50%;transform:translate(-50%,-50%);z-index:2}.is__noPlayButton .video-play{display:none}.is__invertPlayButton .video-play{color:#000}.video-play.is__small{font-size:66px;height:55px;left:50.5%;text-shadow:0 0 45px rgba(0,0,0,.27)}.video-play:after{content:"β–Ά"}.video:hover .video-play,.youtubeVideo:hover .video-play{color:rgb(227,0,22);color:var(--linkColor,var(--keyColor,rgb(227,0,22)))}.video.is__played .video-play{display:none}.is__invertColors .video:hover .video-play,.is__invertColors .youtubeVideo:hover .video-play{color:rgb(227,0,22);color:var(--keyColor,rgb(227,0,22))}widget{display:block}.wiget-data{display:none}.formValueTr{flex-direction:row;flex-wrap:nowrap;margin-bottom:0;min-height:147px}.formValueTr:first-child{border:1px solid rgba(0,0,0,.2);border-width:1px 0;min-height:107px}@media (-webkit-min-device-pixel-ratio:1.5),(min-resolution:144dpi){.formValueTr:first-child{border-color:rgba(0,0,0,.2);border-width:.5px 0}.no__halfPixel .formValueTr:first-child{border-color:rgba(0,0,0,.2);border-width:1px 0}}.formValueTr:last-child{border:1px solid rgba(0,0,0,.2);border-width:1px 0;min-height:242px}@media (-webkit-min-device-pixel-ratio:1.5),(min-resolution:144dpi){.formValueTr:last-child{border-color:rgba(0,0,0,.2);border-width:.5px 0}.no__halfPixel .formValueTr:last-child{border-color:rgba(0,0,0,.2);border-width:1px 0}}.formValueTr:not(:last-child):not(:first-child):not(:nth-child(2)){border:solid rgba(0,0,0,.2);border-width:1px 0 0}@media (-webkit-min-device-pixel-ratio:1.5),(min-resolution:144dpi){.formValueTr:not(:last-child):not(:first-child):not(:nth-child(2)){border-color:rgba(0,0,0,.2);border-width:.5px 0 0}.no__halfPixel .formValueTr:not(:last-child):not(:first-child):not(:nth-child(2)){border-color:rgba(0,0,0,.2);border-width:1px 0 0}}.formValueTd{border:solid rgba(0,0,0,.2);border-width:0 1px 0 0;flex-grow:1;padding-bottom:30px;position:relative}@media (-webkit-min-device-pixel-ratio:1.5),(min-resolution:144dpi){.formValueTd{border-color:rgba(0,0,0,.2);border-width:0 .5px 0 0}.no__halfPixel .formValueTd{border-color:rgba(0,0,0,.2);border-width:0 1px 0 0}}.formValueTd:last-child{border:none}.formValueTr:last-child .formValueTd{padding-bottom:0}.formValueTd:not(:last-child){padding-right:.8em}@media only screen and (max-width:991px){.formValueTd:not(:last-child){padding-right:.45em}}.formValueTd:not(:first-child){padding-left:.8em}@media only screen and (max-width:991px){.formValueTd:not(:first-child){padding-left:.45em}}.formValueTd p+ul.noIndent{margin-top:.7em}.formValueTd .is__faderFirst{margin-top:0!important}.formValueTd .label.formValueTd-label{font-feature-settings:normal;margin:.78125em 0 0!important;padding-bottom:0!important;padding-top:0}.formValueTd .label.formValueTd-label .example h3{margin-bottom:-.28125em!important;margin-top:-.3125em!important}.formValueTd .label+.module>.example:first-of-type{margin-top:.75em}.formValueTd .label+.module>.example:first-of-type.is__liftOut{margin-top:19px}@media only screen and (max-width:991px){.formValueTd .label+.module>.example:first-of-type.is__liftOut{margin-top:.5em}.formValueTd .label+.module>.example:first-of-type{margin-top:.47393em}}.formValueTd .example.is__liftOut:last-child{margin-bottom:2em}.formValueTd .is__activeRightNow:after,.spread[data-state="1"] .formValueTd .is__faderFirst:after{border:6px solid black;bottom:-1px;content:"";left:0;position:absolute;right:-1px;top:-1px;z-index:9999}@media only screen and (max-width:991px){.formValueTd .is__activeRightNow:after,.spread[data-state="1"] .formValueTd .is__faderFirst:after{border:3px solid black}}.formValueTd:not(:first-child) .is__activeRightNow:after{left:-1px;right:0}.formValueTd:first-child .is__activeRightNow:after,.formValueTd:first-child .is__faderFirst:after{border-left:none!important}.formValueTd:first-child .is__faderFirst:after,.formValueTd:last-child .is__activeRightNow:after{border-right:none!important}@media only screen and (max-width:991px){.formValueTd{padding-bottom:0}.formValueTd .label.example+.has__example .example.is__lastChild:not(.is__liftOut){margin-bottom:1em}}.is__glvrd{position:relative}.glvrdScore{color:#000;display:flex!important;flex-direction:column;justify-content:flex-end;white-space:nowrap}.glvrdScore-inner{font-size:12px;margin-bottom:-2px}.glvrdScore-result{color:#009cff}.glvrdScore.is__low .glvrdScore-result{color:#e30016}.caption .glvrdScore-inner{font-size:14px;line-height:1.2;margin-bottom:-4.5px;margin-top:-3px}.module.gutter__fTC{margin-bottom:40px}.module.gutter__fTC.has__caption,.module.gutter__fTC.is__lastChild,.module.gutter__fTC:last-child,.module.gutter__fTC[data-margin-bottom="0"]{margin-bottom:0}.module.is__switcherItem{margin:0}.textBox .image.is__fitToContent.is__fitToContent.is__fitToContent{margin-bottom:40px}.textBox .image.is__fitToContent.is__fitToContent.is__fitToContent.col,.textBox .image.is__fitToContent.is__fitToContent.is__fitToContent.has__caption,.textBox .image.is__fitToContent.is__fitToContent.is__fitToContent.is__lastChild,.textBox .image.is__fitToContent.is__fitToContent.is__fitToContent:last-child{margin-bottom:0}.textBox .textNode+.label{margin-top:40px}.textBox .module.has__textNode.has__textNode.has__textNode{margin-bottom:40px}@media only screen and (max-width:991px){.textBox{flex-basis:auto;flex-grow:0}.textBox.page_left{margin-bottom:40px}}.anchor.has__lastCaption:not(:last-child),.anchor.has__lastSidenote:not(:last-child){margin-bottom:40px}.anchor.has__lastCaption+.anchor,.anchor.has__lastSidenote+.anchor{margin-top:0}.frontpage-main{margin-top:-4px}@media only screen and (max-width:991px){.col.col.col.is__lastOnMobileWrapper{margin-bottom:0;margin-top:40px;order:1}.col.col.col.is__lastChildOnMobile{margin-bottom:0}}.contents{font-feature-settings:normal}.contents.is__compact{font-size:14px;line-height:1.2;text-align:left}.main-contents .contentslink-page{margin-left:calc(1.58333em - 1ch)}.controls-in{padding-top:18px}.bookmark{height:23px;left:0;margin-left:4px;margin-top:-6px;padding-top:2px;text-align:center;width:23px}@media only screen and (max-aspect-ratio:1/1) and (max-width:991px){.bookmark{left:calc(4.16667vw - 15.5px)}}.checkmark{left:max(2.7777777778vw,40px);margin-left:0;margin-top:-4px}@media only screen and (max-width:991px){.checkmark{left:12.5vw;margin-top:.5px}}.editlink.editlink{font-size:.8em;margin:60px 0;z-index:100}.search{left:50vw}@media only screen and (max-width:991px){.search{left:495.5px}}.search{width:47.2222222222vw}@media only screen and (max-width:991px){.search{left:auto;width:467.9722222222px;width:100vw}}.search-header{display:none}.search-button{height:23px;margin-right:-23px;margin-top:-6px;padding-top:2px;text-indent:-1px;width:23px}@media only screen and (max-width:991px){.search-button{margin-right:calc(4.16667vw - 5.5px)}}@media only screen and (max-aspect-ratio:1/1) and (max-width:991px){.search-button{margin-right:calc(4.16667vw - 4.5px)}}.example{line-height:1.2}.example .textNode+ol,.example .textNode+ul{margin-top:-.535em}.example ol:not(:last-child),.example ul:not(:last-child){margin-bottom:1.0404em}.example li .anchor.anchor .anchor-in{margin-top:-.2em!important;padding:0}.example.is__liftOutXL .example-label+.textNode{margin-top:calc(5px - .1924em)!important}.example.is__liftOut.has__caption.has__caption,.example.is__liftOut.has__sidenote.has__sidenote.has__sidenote{margin-bottom:calc(1.13em - 4px)}.answer+.explanation{margin-top:.2em}.glvrdExercise+.explanation{margin-top:calc(5px + .2em)}.answer+.explanation.answerExplanation{margin-bottom:6px;padding-left:18px}.explanationControl{top:10.267px}@media only screen and (max-width:991px){@media (-webkit-min-device-pixel-ratio:1.5),(min-resolution:144dpi){.explanationControl{margin-top:-2px}}}.questionControl{top:.2em}.glvrdExercise-controls,.puzzle-controls{margin-top:-3px}.glvrdExercise-progress{margin-top:3px}@media (-webkit-min-device-pixel-ratio:1.5),(min-resolution:144dpi){.glvrdExercise-progress{margin-top:.25em}@media only screen and (max-width:991px){.glvrdExercise-progress{margin-top:6px}}}.glvrdExercise-reset span,.puzzle-reset span{margin-top:1px}@media (-webkit-min-device-pixel-ratio:1.5),(min-resolution:144dpi){.glvrdExercise-reset span,.puzzle-reset span{margin-top:.071428571em}@media only screen and (max-width:991px){.glvrdExercise-reset span,.puzzle-reset span{margin-top:2.5px}}}@media only screen and (max-width:991px){.image.is__fitToContent{align-self:stretch}.image{--position:top left}}.nav-contents-section-title{font-feature-settings:normal}.page.is__sticky{width:50vw}@media only screen and (max-width:991px){.page.is__sticky{width:495.5px}}.page.is__sticky.is__vertical-tv{width:100%}.page.grid__column .page-in{margin-top:0}.image .page{background:none}.page-in>.is__cover{margin-left:-2.7777777778vw}@media only screen and (max-width:991px){.page-in>.is__cover{margin-left:-27.5277777778px}}.page-in>.is__cover{margin-right:-2.7777777778vw}@media only screen and (max-width:991px){.page-in>.is__cover{margin-right:-27.5277777778px}.page.grid__column .page-in{padding:0}.page_left.page.grid__column .page-in,.page_right.page.grid__column .page-in{margin-left:0;margin-right:0}.page.grid__column .page-transformation .pageNumber{top:calc(100% - 18px)}}.revertical.spread.is__loaded.is__slim .spread-holder{justify-content:flex-start}.row.rowsGutter__page{margin-bottom:20px}.rule{color:#fcc033;font-size:70px;font-style:normal;font-weight:700;line-height:.9em}@media only screen and (max-width:991px){.rule{font-size:49px}}.rule-in{margin-bottom:-.2em!important;margin-top:-.057em!important;text-align:left}.sectionTitle{margin:0;text-align:left}.sectionTitle h1{font-size:2.8em;margin-bottom:-.21825em;margin-top:-.15873016em}.sectionTitle-number{font-size:1em}.question:not(.is__imageQuestion) .answer{margin-top:-3.5px}.answer:first-child{padding-top:0}.answer:after{left:0}.answer.has__example:not(.is__boxed){padding-top:0}.question.is__imageQuestion.is__standalone.is__revealed .answer.is__checked:not(.is__correct):before,.test.is__revealed .question.is__imageQuestion .answer.is__checked:not(.is__correct):before{margin-left:-.9em}.question .heading-3:last-child{margin-bottom:7px!important}.question.is__standalone .question-reset{top:0}.balloon{align-items:flex-end;display:flex;flex-direction:row;position:relative}.balloon.is__my{flex-direction:row-reverse}.balloon.is__clickable{cursor:pointer;touch-action:manipulation}.balloon+.balloon{margin:.3em 0 0!important}.balloon-in{display:block;flex-basis:auto;flex-grow:0;max-width:100%;padding:1em .4em;position:relative}.balloon-back{background-color:var(--keyColor,#fcc033);border-radius:.5em;bottom:0;left:0;opacity:.1;position:absolute;right:0;top:0;z-index:0}.balloon.is__my .balloon-back{opacity:1}.balloon-back:after{background-color:#fcc033;bottom:0;content:"";display:none;height:25px;left:-12px;-webkit-mask-image:url(../images/widget/bubble-tail-a5666dd707.svg);mask-image:url(../images/widget/bubble-tail-a5666dd707.svg);pointer-events:none;position:absolute;width:40px;z-index:990}.balloon.is__my .balloon-back:after{background-color:var(--keyColor,#fcc033);left:auto;right:-12px;transform:scaleX(-1)}.balloon-contents{position:relative;z-index:1}.balloon-loadIndicator{display:flex}.balloon-loadIndicator>span{opacity:.14}.balloon-loadIndicator>span:first-child{animation:blink 1s .3333s infinite}.balloon-loadIndicator>span:nth-child(2){animation:blink 1s .6666s infinite}.balloon-loadIndicator>span:nth-child(3){animation:blink 1s .9999s infinite}@keyframes blink{50%{opacity:1}}.cfc-in{background-image:url(../images/cover/mama-meets-ai-4375804aac.jpg);background-position:50%;background-size:cover}.cfc-extraCover{background-size:100%;bottom:0;left:0;position:absolute;right:0;top:0}.clientsExercise .exerciseControls{align-items:flex-start;bottom:auto;flex-direction:row;left:auto;margin-top:5.5px;right:0;top:100%;z-index:10}@media only screen and (max-width:991px){@media (-webkit-min-device-pixel-ratio:1.5),(min-resolution:144dpi){.clientsExercise .exerciseControls{margin-top:3.5px}}}.clientsExercise .exerciseControls-result{margin-right:5px;margin-top:-1px}.clientsExercise .exerciseControls-result.is__failed{margin-top:.5px}.clientsExercise .balloon{opacity:1;transition:transform .4s ease}@media only screen and (max-width:991px){.clientsExercise .balloon{will-change:transform}}.clientsExercise .balloon-back{transition:opacity .2s ease;will-change:opacity}.clientsExercise-inner{padding:0 1px;position:relative}.clientsExercise.is__readOnly .clientsExercise-messages{filter:saturate(0)}.clientsExercise-messages .balloon:last-child .balloon-back:after,.clientsExercise-messages .balloon:nth-last-child(-n+2) .balloon-back:after{display:block}.clientsExercise-messages .balloon.is__firstOne,.clientsExercise-messages .balloon.is__new{position:relative;z-index:100}.clientsExercise-messages .balloon.is__new:not(.is__firstOne){transform:translateY(.3em)}.clientsExercise-messages .balloon.is__new .balloon-back{opacity:0}.clientsExercise-replies{display:flex;flex-wrap:wrap;gap:.3em;justify-content:flex-end;margin-top:40px}.clientsExercise-replies .balloon{transition:opacity .4s ease;will-change:opacity}.clientsExercise-replies .balloon-back{transition:border-color .4s ease,opacity .4s ease;will-change:opacity}.clientsExercise-inner.is__replying .clientsExercise-replies{left:0;margin-top:0;position:absolute;right:0;top:var(--currentRepliesOffset,auto);z-index:90}.clientsExercise-inner.is__opponentWriting .clientsExercise-replies,.clientsExercise-inner.is__replying .clientsExercise-replies .balloon:not(.is__active){opacity:0;pointer-events:none}.clientsExercise-messages:empty+.clientsExercise-replies,.clientsExercise-replies:empty{margin-top:0}.clientsExercise-replies .balloon-back.balloon-back{background-color:transparent;border:1px solid #fcc033;opacity:1}.clientsExercise-replies .balloon:hover .balloon-back.balloon-back{background-color:#fcc033}@media only screen and (max-width:991px){.clientsExercise-replies .balloon:hover .balloon-back.balloon-back{background-color:transparent}}.clientsExercise-replies .balloon.is__active .balloon-back.balloon-back{border-color:transparent;opacity:0}.clientsExercise-replies .balloon.is__active .balloon-contents{opacity:0}.clientsExercise-replies .balloon+.balloon{margin:0!important}.clientsExercise-replies.is__hidden{display:none}.clientsExercise-introText{color:rgba(0,0,0,.7);font-size:.9em;margin-bottom:.8em}.clientsExercise-introText p{margin:0 0 .4em}.clientsExercise-error{color:#b30000;font-size:.85em;margin-top:.8em}.clientsExercise-composer{align-items:stretch;display:flex;gap:.5em;margin-top:40px}.clientsExercise.is__readOnly .clientsExercise-composer{display:none}.clientsExercise-composerInput{background:rgba(255,255,255,.9);border:1px solid rgba(0,0,0,.15);border-radius:999px;flex:1;font:inherit;padding:.6em .8em}.clientsExercise-composerInput:focus{border-color:rgba(0,0,0,.3);box-shadow:0 0 0 2px rgba(0,0,0,.05);outline:none}.clientsExercise-composerInput:disabled{cursor:not-allowed;opacity:.6}.clientsExercise-composerSubmit{background:#000;border:none;border-radius:999px;color:#fff;cursor:pointer;font:inherit;padding:.6em 1.2em;transition:background .4s ease}.clientsExercise-composerSubmit:focus,.clientsExercise-composerSubmit:hover{background:#333;outline:none}.clientsExercise-composerSubmit:disabled{background:rgba(0,0,0,.3);cursor:not-allowed}.clientsExercise-validatorCard{background:rgba(255,255,255,.9);border:1px solid rgba(0,0,0,.15);border-radius:.75em;font-size:.9em;margin-top:40px;padding:.9em 1em}.clientsExercise-validatorCard.is__success{background:rgba(25,134,66,.08);border-color:rgba(25,134,66,.5)}.clientsExercise-validatorCard.is__failure{background:rgba(193,115,0,.08);border-color:rgba(193,115,0,.5)}.clientsExercise-validatorCardHeader{align-items:center;display:flex;font-weight:600;gap:.5em;margin-bottom:.4em}.clientsExercise-validatorBadge{font-size:1.5em;line-height:1}.clientsExercise-validatorScoreText{font-size:1em}.clientsExercise-validatorFeedback{line-height:1.4;margin-bottom:.4em}.clientsExercise-validatorSuggestion{background:rgba(0,0,0,.03);border-radius:.5em;margin-bottom:.4em;padding:.6em .8em}.clientsExercise-validatorSuggestionLabel{color:rgba(0,0,0,.6);font-size:.8em;letter-spacing:.02em;margin-bottom:.3em;text-transform:uppercase}.clientsExercise-validatorSuggestionBody{font-family:inherit;line-height:1.35;white-space:normal}.clientsExercise-validatorHints{color:rgba(0,0,0,.7);font-size:.8em}.clientsExerciseExplanation{opacity:1;padding-right:40px;visibility:visible}.clientsExerciseExplanation .caption-text{opacity:0;visibility:hidden}.clientsExerciseExplanation.is__visible .caption-text{opacity:1;transition:opacity .4s ease;visibility:visible}.dummy-back .dummy-cover{background-image:url(../images/cover/back-d8c95b50e6.jpg)}.dummy-front .dummy-cover{background-image:url(../images/cover/mama-meets-ai-4375804aac.jpg);background-position:50%;background-size:cover}.dummy-back .dummy-cover,.dummy-front .dummy-cover{background-repeat:no-repeat}.dummy-back .dummy-cover:after,.dummy-back .dummy-cover:before,.dummy-front .dummy-cover:after,.dummy-front .dummy-cover:before{background-color:#fcc033}