:root{--lightningcss-light:initial;--lightningcss-dark: ;color-scheme:light;--brand-blue:#0757ed;--brand-navy:#08265c;--brand-teal:#00af9a;--brand-muted:#58718e;--brand-border:#d5e5f6}body{color:var(--brand-navy);background:#edf6ff;margin:0;font-family:system-ui,-apple-system,Segoe UI,sans-serif}.reading-app{background:linear-gradient(#f3f9ff,#edf6ff);max-width:780px;min-height:100vh;margin:auto;padding:0 28px 56px}.brand-header{z-index:50;border-bottom:1px solid var(--brand-border);-webkit-backdrop-filter:blur(10px);backdrop-filter:blur(10px);background:#f3f9fff5;justify-content:space-between;align-items:center;padding:14px 0;display:flex;position:sticky;top:0}.brand-home{cursor:pointer;color:var(--brand-navy);background:0 0;border:0;align-items:center;gap:16px;font-weight:650;display:flex}.brand-logo{width:104px;height:44px;display:block}.brand-divider{background:#bed4ed;width:1px;height:22px}.notebook-button{color:var(--brand-blue);cursor:pointer;background:#fff;border:1px solid #c9def5;border-radius:10px;align-items:center;gap:7px;padding:9px 11px;display:flex}.library-hero{text-align:center;padding:42px 12px 26px}.library-hero .eyebrow{color:var(--brand-teal);letter-spacing:2.6px;font-size:11px;font-weight:700}.library-hero h1{color:var(--brand-navy);letter-spacing:1px;margin:12px 0 8px;font-size:32px}.library-hero p{color:var(--brand-muted);margin:0;font-size:14px;line-height:1.9}.library-hero .hero-rule{background:var(--brand-teal);border-radius:8px;width:48px;height:3px;margin:22px auto 0}.chapter-tabs{border:1px solid var(--brand-border);background:#fff;border-radius:14px;grid-template-columns:repeat(6,minmax(0,1fr));gap:4px;margin:18px 0 22px;padding:5px;display:grid}.chapter-tabs button{color:#637c99;cursor:pointer;background:0 0;border:0;border-radius:10px;flex-direction:column;justify-content:center;align-items:center;gap:7px;padding:12px 2px;font-size:12px;font-weight:550;display:flex}.chapter-tabs button[aria-selected=true]{color:var(--brand-blue);background:#eaf2ff;box-shadow:inset 0 -2px #0757ed}.teacher-note{text-align:left;background:#fff;border:1px solid #cbdff4;border-radius:14px;margin-top:18px;font-family:system-ui,sans-serif;overflow:hidden}.teacher-note-toggle{width:100%;color:var(--brand-navy);cursor:pointer;background:#eaf4ff;border:0;justify-content:space-between;align-items:center;padding:15px 18px;font-size:14px;font-weight:650;display:flex}.teacher-note-toggle>span:first-child{align-items:center;gap:9px;display:flex}.note-toggle-label{color:var(--brand-muted);font-size:12px;font-weight:400}.teacher-note-body{padding:4px 20px 18px}.teacher-note-body h3{color:#07877f;letter-spacing:1px;margin:18px 0 7px;font-size:11px}.note-expressions{margin:0}.note-expressions>div{border-bottom:1px dashed #c8dbed;grid-template-columns:minmax(100px,34%) minmax(0,1fr);gap:18px;padding:12px 0;line-height:1.8;display:grid}.note-expressions>div:last-child{border-bottom:0}.note-expressions dt{color:#1453a3;overflow-wrap:anywhere;font-size:14px;font-weight:650}.note-expressions dd{color:#385473;margin:0;font-size:13px}.note-insights{margin:0;padding:0;list-style:none}.note-insights li{color:#385473;border-bottom:1px dashed #c8dbed;padding:10px 0 10px 16px;font-size:13px;line-height:1.9;position:relative}.note-insights li:last-child{border:0}.note-insights li:before{content:"—";color:var(--brand-teal);position:absolute;left:0}.edition-label{color:#267a80;background:#f0fafb;border:1px solid #cde2ed;border-radius:6px;padding:3px 7px;font-family:system-ui,sans-serif;font-size:11px;line-height:1.4;display:inline-block}.reading-scope{color:#58718e;background:#e8f2ff;border-radius:9px;margin:10px 0;padding:10px 13px;font-family:system-ui,sans-serif;font-size:12px;line-height:1.8}button:focus-visible{outline-offset:3px;outline:3px solid #00af9a}@media (width<=540px){.reading-app{padding:0 16px 40px}.brand-home{gap:10px}.brand-home>span:last-child{font-size:18px}.brand-logo{width:88px;height:37px}.library-hero{padding:30px 2px 20px}.library-hero h1{font-size:28px}.chapter-tabs{gap:1px}.chapter-tabs button{padding:10px 0;font-size:11px}.teacher-note-body{padding-left:15px;padding-right:15px}.note-expressions>div{grid-template-columns:minmax(85px,33%) minmax(0,1fr);gap:12px}}.brand-home>span:last-child{white-space:nowrap;font-size:22px}.inline-icon-label{align-items:center;gap:8px;display:flex}.inline-icon-label svg{flex-shrink:0}.reading-guide{color:var(--brand-muted);background:#e6f1ff;border-radius:10px;padding:14px 16px;font-size:13px;line-height:1.9}.vocab-navigation{grid-template-columns:1fr 1fr;gap:10px;margin-top:14px;display:grid}.vocab-navigation button{color:var(--brand-blue);cursor:pointer;background:#fff;border:1px solid #bdd4f1;border-radius:10px;padding:12px;font-size:14px}.vocab-navigation button:disabled{opacity:.4;cursor:default}@media (width<=540px){.brand-home>span:last-child{font-size:18px}.brand-home{gap:8px;padding:0}.notebook-button{gap:4px;padding:8px}}