.book-eyebrow{color:var(--color-red);font-size:.72rem;letter-spacing:.14em;margin-bottom:16px}.book-intro{text-align:center;margin:26px auto 38px}.book-intro .hero-title{font-size:clamp(1.8rem,3.2vw,2.4rem);font-weight:var(--font-weight-regular);line-height:1.15;margin-bottom:22px}.book-intro .page-intro{max-width:780px;margin:0 auto;color:var(--color-muted);font-size:1rem}.book-invite{font-size:.91rem;color:var(--color-text);margin-top:18px}.book-grid{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:30px 22px;margin-bottom:40px}.book-tile{display:flex;flex-direction:column;border:1px solid var(--border-soft);background:var(--color-white);border-radius:var(--radius-small);overflow:hidden;transition:box-shadow .18s,transform .18s}.book-tile:hover{box-shadow:var(--shadow-card-hover);transform:translateY(-4px)}.book-tile img{width:100%;height:auto;aspect-ratio:1.44;object-fit:cover;object-position:top;background:var(--color-soft)}.book-tile-copy{padding:17px 18px 20px}.book-tile-meta{font-size:.7rem;color:var(--color-muted);margin-bottom:7px;display:flex;justify-content:space-between;gap:8px}.book-tile h2{font-size:1.15rem;font-weight:400;line-height:1.3;letter-spacing:-.02em}.book-tile p{font-size:.83rem;color:var(--color-muted);margin-top:8px;line-height:1.45}.book-tile-arrow{color:var(--color-red);float:right;font-size:1.2rem}.book-disclaimer{border-top:1px solid var(--border-mid);padding-top:22px;font-size:.75rem;line-height:1.7;color:var(--color-muted);margin-top:36px}.book-disclaimer a{text-decoration:underline;text-underline-offset:3px;color:inherit}.book-skip{position:fixed;top:-80px;left:20px;background:white;color:var(--color-red);padding:12px;z-index:100}.book-skip:focus{top:10px}.book-sr{position:absolute;width:1px;height:1px;clip-path:inset(50%);overflow:hidden;white-space:nowrap}.book-home-page a:focus-visible,.book-viewer-page a:focus-visible,button:focus-visible,select:focus-visible{outline:2px solid var(--color-red);outline-offset:4px}.book-viewer-page{--book-top:0px;--book-toolbar-height:64px;--book-context-height:60px}.book-viewer-page .site-shell{max-width:1640px;overflow:visible}.book-viewer-page .site-main{width:100%;padding-inline:18px}.book-viewer-page .site-header{max-width:1160px;margin:auto}.book-toolbar{position:sticky;top:var(--book-top);z-index:20;background:rgba(255,255,255,.97);border:1px solid var(--border-mid);box-shadow:0 4px 16px #1f29330a;border-radius:12px;padding:10px;display:flex;align-items:center;gap:12px;flex-wrap:wrap;backdrop-filter:blur(10px)}.book-case-nav,.book-view-nav,.book-device-nav{display:flex;align-items:center;gap:5px}.book-case-nav{flex:1;min-width:360px}.book-view-nav,.book-device-nav{border-left:1px solid var(--border-mid);padding-left:12px}.book-control{font-size:.8rem;padding:7px 10px;min-height:36px;display:inline-flex;align-items:center;justify-content:center;gap:5px;white-space:nowrap;border:1px solid transparent;border-radius:8px;background:transparent;color:var(--color-muted);cursor:pointer;font-weight:400}.book-control:hover{color:var(--color-text);background:var(--color-bg)}.book-control[aria-pressed="true"]{background:#bc002d0e;color:var(--color-red);border-color:#bc002d28}.book-arrow{border:1px solid var(--border-mid);width:34px;font:18px Arial,sans-serif;padding:4px}.book-home{padding-left:4px}.book-case-nav select{width:100%;max-width:310px;min-width:100px;font-size:.83rem;padding:8px 25px 8px 10px;border:1px solid var(--border-mid);border-radius:7px;background:white;color:var(--color-text)}.book-context{display:flex;align-items:baseline;gap:10px;flex-wrap:wrap;padding:13px 5px 10px;font-size:.75rem;color:var(--color-muted)}.book-context h1{font-size:.86rem;color:var(--color-text);font-weight:400;line-height:1.3}.book-context #concept-position{margin-left:auto}.book-context p{flex-basis:100%;font-size:.74rem}.book-context #official-link{color:var(--color-red);font-size:.75rem}.book-context [hidden]{display:none}.book-stage{display:flex;justify-content:center;background:#eef0f2;border:1px solid var(--border-mid);border-radius:10px;padding:8px;height:calc(100dvh - var(--book-top) - var(--book-toolbar-height) - var(--book-context-height) - 28px);min-height:420px;max-height:1100px;overflow:hidden}.book-stage iframe{border:0;background:white;display:block;width:100%;height:100%;max-width:1440px;box-shadow:0 4px 20px #1f293315}.book-stage.is-mobile iframe,.book-stage.is-mobile .book-reference{max-width:390px}.book-reference{background:white;width:100%;max-width:1440px;overflow:auto}.book-reference img{width:100%;height:auto;display:block}.book-reference p{padding:10px;font-size:.72rem;color:var(--color-muted)}.book-stage [hidden]{display:none!important}.book-viewer-page .footer-note{margin-top:26px}.book-viewer-page .book-disclaimer{max-width:1124px;margin:28px auto 0}.book-context a:hover{text-decoration:underline}.book-tile:hover h2{color:var(--color-red)}@media(max-width:1100px){.book-toolbar{gap:8px}.book-case-nav{flex-basis:100%}.book-case-nav select{max-width:none}.book-view-nav{border-left:0;padding-left:0}.book-device-nav{margin-left:auto}}@media(max-width:820px){.book-grid{grid-template-columns:repeat(2,minmax(0,1fr));gap:20px 16px}.book-viewer-page .site-main{padding-inline:10px}.book-control{font-size:.75rem;padding:6px 8px}.book-context{gap:7px}}@media(max-width:600px){.book-grid{grid-template-columns:1fr;gap:24px}.book-intro{margin:20px auto 30px}.book-intro .hero-title{font-size:1.85rem}.book-intro .page-intro{font-size:.91rem}.book-invite{font-size:.83rem}.book-eyebrow{font-size:.59rem;letter-spacing:.1em}.book-viewer-page{padding:12px 6px}.book-toolbar{padding:7px;gap:6px;border-radius:8px}.book-case-nav{min-width:0;gap:4px;display:grid;grid-template-columns:auto 28px minmax(0,1fr) 28px;width:100%}.book-case-nav select{font-size:.68rem;padding-left:5px;min-width:0}.book-arrow{width:28px;min-height:34px}.book-home{font-size:.65rem;padding:4px 2px}.book-view-nav{gap:2px}.book-view-nav .book-control{font-size:.65rem;padding:5px 6px}.book-device-nav{gap:0;padding-left:5px}.book-device-nav .book-control{font-size:.62rem;padding:5px 4px}.book-context h1{font-size:.75rem}.book-context{font-size:.65rem}.book-stage{padding:3px;min-height:350px;border-radius:6px}.book-viewer-page .site-main{padding-inline:6px}.book-viewer-page .book-disclaimer{padding-inline:12px;font-size:.7rem}.book-viewer-page .site-header{padding-inline:10px}.book-context p{font-size:.67rem}}@media(prefers-reduced-motion:reduce){html{scroll-behavior:auto}.book-tile{transition:none}}
