:root{--sk-book-stack-header-top: calc(var(--header-height, 60px) * var(--use-sticky-header, 0) + var(--announcement-bar-height, 0px));--sk-book-stack-nav-height: 0rem;--sk-book-stack-top: var(--sk-book-stack-header-top);--sk-book-stack-viewport-full: calc(100svh - var(--sk-book-stack-header-top));--sk-book-stack-viewport-full: calc(100dvh - var(--sk-book-stack-header-top));--sk-book-stack-viewport: calc(100svh - var(--sk-book-stack-header-top) - var(--sk-book-stack-nav-height));--sk-book-stack-viewport: calc(100dvh - var(--sk-book-stack-header-top) - var(--sk-book-stack-nav-height))}.SkBookStack{position:relative;background:#fff;color:#1a1a1a}.SkBookStack__nav{background:#fff;border-top:1px solid rgba(0,0,0,.08);box-shadow:0 -8px 32px #0000000a;z-index:30}.SkBookStack__nav.is-floating{position:fixed;bottom:0;left:0;right:0}.SkBookStack__nav.is-docked{position:relative;flex-shrink:0}.SkBookStack__nav.is-hidden{visibility:hidden;pointer-events:none}.SkBookStack__navScroll{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:0;max-width:100%}.SkBookStack__navItem{display:flex;flex-direction:column;gap:.45rem;padding:1rem .85rem 1.1rem;text-decoration:none;color:#1a1a1a;border-right:1px solid rgba(0,0,0,.06);transition:background .2s ease,color .2s ease;min-height:var(--sk-book-stack-nav-height);box-sizing:border-box}.SkBookStack__navItem:last-child{border-right:0}.SkBookStack__navItem:hover,.SkBookStack__navItem.is-active{background:#00000008}.SkBookStack__navHeading{display:block;font-family:var(--heading-font-family, inherit);font-size:.62rem;font-weight:400;letter-spacing:.18em;line-height:1.35;text-transform:uppercase}.SkBookStack__navNum{display:block;font-size:.58rem;font-weight:500;margin-bottom:.2rem}.SkBookStack__navTitle{display:block}.SkBookStack__navTeaser{display:block;font-size:.72rem;line-height:1.45;letter-spacing:0;text-transform:none;color:#5a5a5a}.SkBookStack__track{position:relative}.SkBookStack__card{position:sticky;top:var(--sk-book-stack-top);z-index:calc(var(--sk-book-stack-index, 0) + 1);min-height:var(--sk-book-stack-viewport);display:flex;align-items:stretch;background:#fff;box-sizing:border-box;scroll-margin-top:var(--sk-book-stack-top)}.SkBookStack__spread{display:grid;grid-template-columns:1fr 1fr;width:100%;min-height:var(--sk-book-stack-viewport);transform-origin:center top;will-change:transform}.SkBookStack__spread--solo{grid-template-columns:1fr}.SkBookStack__spread:has(.SkBookStack__copy--full){grid-template-columns:1fr}.SkBookStack__media{display:flex;align-items:center;justify-content:center;padding:clamp(1.5rem,4vw,3rem) clamp(1.5rem,4vw,3.5rem);background:#fff;border-right:1px solid rgba(0,0,0,.06);box-sizing:border-box}.SkBookStack__spread--reverse .SkBookStack__media{border-right:0;border-left:1px solid rgba(0,0,0,.06)}.SkBookStack__img{display:block;width:min(100%,26rem);max-height:calc(var(--sk-book-stack-viewport) - 2rem);height:auto;object-fit:contain;object-position:center center;-webkit-user-select:none;user-select:none;-webkit-user-drag:none}.SkBookStack__videoFrame{display:flex;align-items:center;justify-content:center;width:min(100%,26rem);max-height:calc(var(--sk-book-stack-viewport) - 2rem);aspect-ratio:4 / 5;overflow:hidden}.SkBookStack__video{display:block;width:100%;height:100%;max-height:none;object-fit:cover;object-position:center center;background:transparent}.SkBookStack__copy{display:flex;flex-direction:column;justify-content:center;padding:clamp(1.5rem,4vw,3.5rem) clamp(2rem,6vw,5.5rem) clamp(1.5rem,4vw,2.5rem);box-sizing:border-box}.SkBookStack__copy--full{max-width:42rem;margin:0 auto;width:100%}.SkBookStack__chapter{display:flex;flex-wrap:wrap;align-items:baseline;gap:.45rem .65rem;margin:0 0 clamp(1.75rem,4vw,2.5rem);font-family:var(--heading-font-family, inherit);font-size:.72rem;font-weight:400;letter-spacing:.22em;line-height:1.4;text-transform:uppercase;color:#1a1a1a}.SkBookStack__chapterNum{font-weight:500}.SkBookStack__body{max-width:34rem;font-size:clamp(.92rem,1.35vw,1rem);line-height:1.72;color:#2a2a2a}.SkBookStack__body p{margin:0 0 1.15em}.SkBookStack__body p:last-child{margin-bottom:0}@media(max-width:1007px){.SkBookStack__navScroll{display:none!important}}@media(max-width:900px){:root{--sk-book-stack-nav-height: 6.5rem}.SkBookStack__navScroll{display:flex;overflow-x:auto;-webkit-overflow-scrolling:touch;scrollbar-width:none}.SkBookStack__navScroll::-webkit-scrollbar{display:none}.SkBookStack__navItem{flex:0 0 min(72vw,14rem);border-right:1px solid rgba(0,0,0,.06)}.SkBookStack__spread{grid-template-columns:1fr;grid-template-rows:auto 1fr}.SkBookStack__media{border-right:0;border-bottom:1px solid rgba(0,0,0,.06);padding:clamp(1.25rem,4vw,2rem) clamp(1.25rem,4vw,2rem) clamp(.75rem,3vw,1.25rem)}.SkBookStack__spread--reverse .SkBookStack__media{border-bottom:0;border-left:0;border-top:1px solid rgba(0,0,0,.06);padding:clamp(.75rem,3vw,1.25rem) clamp(1.25rem,4vw,2rem) clamp(1.25rem,4vw,2rem)}.SkBookStack__img,.SkBookStack__videoFrame{width:min(72vw,18rem);max-height:calc(var(--sk-book-stack-viewport) - 3rem)}.SkBookStack__video{height:100%;max-height:none}.SkBookStack__copy{padding:clamp(1.25rem,4vw,2rem) clamp(1.25rem,5vw,2rem) clamp(1.25rem,4vw,1.5rem);justify-content:flex-start}.SkBookStack__chapter{margin-bottom:1.25rem}}@media(prefers-reduced-motion:reduce){.SkBookStack__card{position:relative;top:auto;min-height:auto}.SkBookStack__card--last .SkBookStack__spread,.SkBookStack__spread{min-height:auto;transform:none!important}}
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