:root{--navy:#071b4d;--teal:#007d8d;--soft:#f7fbfc;--line:#dce8ee;--muted:#64708b;--white:#fff;--shadow:0 22px 70px rgba(7,27,77,.11)}*{box-sizing:border-box}body{margin:0;min-height:100vh;background:linear-gradient(145deg,#fff,#f6fbfc 52%,#eef9fa);color:var(--navy);font-family:Inter,ui-sans-serif,system-ui,-apple-system,BlinkMacSystemFont,"Segoe UI",sans-serif}button,input,select{font:inherit}button{cursor:pointer}button:disabled{cursor:not-allowed;opacity:.58}.app-shell{display:grid;grid-template-columns:260px minmax(0,1fr);min-height:100vh}.sidebar{position:sticky;top:0;height:100vh;padding:30px 22px;border-right:1px solid var(--line);background:rgba(255,255,255,.78);backdrop-filter:blur(20px)}.brand-lockup{display:flex;gap:10px;align-items:center;color:var(--navy);text-decoration:none}.brand-lockup small{display:block;color:var(--muted);margin-top:2px}.brand-mark{display:grid;place-items:center;width:48px;height:48px;border-radius:14px;background:linear-gradient(135deg,#123b86,#0099a8);color:#fff;font-weight:950;letter-spacing:-.08em}.side-nav{display:grid;gap:8px;margin-top:38px}.nav-item,.bottom-item{border:0;background:transparent;color:var(--muted)}.nav-item{display:flex;gap:12px;align-items:center;padding:13px 14px;border-radius:16px;font-weight:800;text-align:left}.nav-item.active,.nav-item:hover{background:linear-gradient(135deg,rgba(0,153,168,.13),rgba(18,59,134,.06));color:var(--teal)}.sync-card{position:absolute;left:22px;right:22px;bottom:28px;display:grid;gap:8px;padding:18px;border:1px solid var(--line);border-radius:22px;background:linear-gradient(135deg,#fff,#dff8f8);font-size:13px}.sync-card span{line-height:1.55;color:var(--muted)}.main-area{min-width:0;padding:22px clamp(18px,4vw,46px) 48px}.topbar{position:sticky;top:0;z-index:2;display:flex;justify-content:space-between;gap:16px;align-items:center;padding:12px 0 18px;background:linear-gradient(180deg,rgba(247,251,252,.96),rgba(247,251,252,0));backdrop-filter:blur(12px)}.search-box{display:flex;align-items:center;gap:8px;min-width:min(100%,560px);padding:10px 14px;border:1px solid var(--line);border-radius:999px;background:rgba(255,255,255,.88);box-shadow:0 10px 34px rgba(7,27,77,.06)}.search-box input{width:100%;border:0;outline:0;background:transparent;color:var(--navy)}.mode-badge{white-space:nowrap;padding:9px 12px;border:1px solid var(--line);border-radius:999px;background:rgba(255,255,255,.86);color:var(--muted);font-size:12px;font-weight:800}.view{display:none}.active-view{display:block}.hero-card{display:grid;grid-template-columns:minmax(0,1fr) minmax(220px,360px);gap:28px;align-items:end;padding:clamp(24px,5vw,44px);border:1px solid var(--line);border-radius:34px;background:radial-gradient(circle at 82% 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p{margin-bottom:0;color:var(--muted)}.library-controls{display:flex;flex-wrap:wrap;justify-content:flex-end;gap:8px}select{border:1px solid var(--line);border-radius:12px;background:#fff;padding:10px 12px;color:var(--navy)}.book-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(280px,1fr));gap:16px}.book-card{display:grid;grid-template-columns:76px minmax(0,1fr);gap:16px;padding:18px;border:1px solid var(--line);border-radius:24px;background:#fff;box-shadow:0 16px 48px rgba(7,27,77,.06)}.book-card.is-incomplete{border-style:dashed;background:linear-gradient(135deg,#fff,#fbfdfe)}.cover{display:grid;place-items:center;width:76px;aspect-ratio:.72;border:1px solid var(--line);border-radius:12px;background:linear-gradient(155deg,#fff,#e8f6f7 48%,#dff8f8);color:var(--teal);font-size:24px;font-weight:950;box-shadow:0 12px 30px rgba(7,27,77,.1)}.book-card h3{margin-bottom:6px;letter-spacing:-.04em}.book-card p:not(.eyebrow){color:var(--muted);line-height:1.55}.tag{display:inline-block;margin:2px 4px 0 0;padding:5px 8px;border-radius:999px;background:#e9f8f8;color:var(--teal);font-size:11px;font-weight:800}.card-actions{display:flex;gap:8px;margin-top:14px;flex-wrap:wrap}.primary-button,.ghost-button,.reader-action{border:0;border-radius:15px;padding:11px 15px;font-weight:900}.primary-button{background:linear-gradient(135deg,#123b86,#007d8d);color:#fff}.ghost-button{border:1px solid var(--line);background:#fff;color:var(--navy)}.reader{max-width:960px;margin:auto;padding:8px 0 60px}.reader-shell{padding:clamp(24px,5vw,56px);border:1px solid var(--line);border-radius:30px;background:#fff;box-shadow:var(--shadow)}.reader-top{display:flex;justify-content:space-between;gap:18px;align-items:flex-start;margin-bottom:30px}.reader-title{max-width:760px;margin:0;font-size:clamp(34px,5vw,58px);line-height:1.03;letter-spacing:-.07em}.reader-meta{margin-top:10px;color:var(--muted)}.reader-nav{position:sticky;top:72px;z-index:1;display:flex;flex-wrap:wrap;gap:8px;margin:22px 0 34px;padding:10px;border:1px solid var(--line);border-radius:22px;background:rgba(255,255,255,.92);backdrop-filter:blur(14px)}.reader-nav button{border:1px solid var(--line);border-radius:999px;padding:9px 12px;background:#fff;color:var(--muted);font-size:12px;font-weight:850}.reader-nav button.active{background:var(--navy);color:#fff}.reader-section{scroll-margin-top:150px;padding:34px 0;border-top:1px solid var(--line)}.reader-section:first-of-type{border-top:0}.reader-section 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minmax(0,1fr)}.cover{width:62px}.reader{padding-bottom:74px}.reader-shell{padding:22px 18px;border-radius:22px}.reader-top{flex-direction:column}.reader-nav{top:6px;margin:18px -4px 22px;max-height:132px;overflow:auto;border-radius:18px}.reader-section{scroll-margin-top:160px;padding:28px 0}.reader-prose p,.reader-prose li,.reader-prose blockquote{font-size:17px;line-height:1.88}.reader-section-footer{align-items:stretch;flex-direction:column}.reader-section-footer div{justify-content:stretch}.reader-section-footer button{flex:1 1 180px}}