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26px;font-family:var(--font-display);font-weight:400;font-size:26px;line-height:1.25}.quiz-options{display:grid;gap:10px}.quiz-option{display:flex;justify-content:space-between;align-items:center;gap:12px;width:100%;min-height:56px;padding:14px 18px;border-radius:16px;border:.5px solid var(--app-rule);background:var(--app-card);text-align:left;font-size:16px;line-height:1.4}.quiz-option.right{border:1.5px solid #8fb39a;background:#8fb39a24}.quiz-option.wrong{opacity:.55;text-decoration:line-through;text-decoration-thickness:1px}.quiz-option.idle-solved{opacity:.45}.quiz-hint{margin:14px 0 0;font-size:14px;color:var(--app-muted)}.quiz-explain{margin-top:20px}.quiz-explain p{margin:0 0 22px;font-size:15px;line-height:1.6}.quiz-result .display{margin:12px 0 14px}.quiz-result>p{font-size:15px;line-height:1.6;margin:0 0 24px}.quiz-reflection{padding:16px 18px;border-radius:16px;background:var(--app-card);font-family:var(--font-display);font-size:18px;line-height:1.45}.quiz-result>p.quiz-device{margin:16px 0 0;font-size:13px;text-align:center;color:var(--app-muted)}.reader-launch-ready{animation:reader-launch-fade .18s ease-out both}@keyframes reader-launch-fade{0%{opacity:0}to{opacity:1}}@media (prefers-reduced-motion: reduce){.reader-launch-ready{animation:none}}@font-face{font-family:Barlow Condensed;font-weight:500;font-display:swap;src:url(/fonts/barlow-condensed-latin-500.woff2) format("woff2")}:root,[data-appearance=dark]{--app-bg: #111113;--app-card: #1e1e1f;--app-ink: #eae9e7;--app-muted: #9e9e9c;--app-rule: rgb(234 233 231 / .18);--app-accent: #eae9e7;--app-on-accent: #0c0c0d;--app-glass: rgb(17 17 19 / .72);color-scheme:dark}[data-appearance=light]{--app-bg: #eae9e7;--app-card: #f4f3f1;--app-ink: #0e0e0f;--app-muted: #616161;--app-rule: rgb(14 14 15 / .16);--app-accent: #0e0e0f;--app-on-accent: #f4f3f1;--app-glass: rgb(234 233 231 / .72);color-scheme:light}[data-reader-theme=ivory]{--rd-bg:#f9f6ef;--rd-fg:#1b1a19;--rd-secondary:#6e6961;--rd-accent:#651f32;--rd-highlight:#f0d9ad}[data-reader-theme=white]{--rd-bg:#ffffff;--rd-fg:#1b1a19;--rd-secondary:#6e6961;--rd-accent:#651f32;--rd-highlight:#f0d9ad}[data-reader-theme=night]{--rd-bg:#191a1c;--rd-fg:#e8e6db;--rd-secondary:#9c998f;--rd-accent:#d1a887;--rd-highlight:#6b4a33}[data-reader-theme=black]{--rd-bg:#000000;--rd-fg:#d6d6d1;--rd-secondary:#8c8c87;--rd-accent:#d1a887;--rd-highlight:#573d29}:root{--font-ui: -apple-system, system-ui, sans-serif;--font-display: ui-serif, "New York", Georgia, serif;--font-brand: "Barlow Condensed", "Arial Narrow", sans-serif;--safe-top: env(safe-area-inset-top, 0px);--safe-bottom: env(safe-area-inset-bottom, 0px);--gutter: 22px;--tabbar: 64px}*{box-sizing:border-box}html{-webkit-text-size-adjust:100%;font:-apple-system-body}html,body{margin:0;background:var(--app-bg);color:var(--app-ink)}body{font-family:var(--font-ui);-webkit-font-smoothing:antialiased;-webkit-tap-highlight-color:transparent;overscroll-behavior-y:none}button{font:inherit;color:inherit;background:none;border:0;padding:0;cursor:pointer}a{color:inherit}:focus-visible{outline:2px solid var(--app-ink);outline-offset:3px;border-radius:4px}.visually-hidden{position:absolute;width:1px;height:1px;overflow:hidden;clip:rect(0 0 0 0);white-space:nowrap}.preview-band{position:fixed;z-index:100;top:0;left:0;right:0;padding:calc(var(--safe-top) + 3px) 12px 3px;display:flex;justify-content:space-between;align-items:center;background:#6d5a1f;color:#fff6dc;font-size:10px;font-weight:600;letter-spacing:.12em;text-transform:uppercase}.preview-band button{font-size:10px;letter-spacing:.08em;text-decoration:underline;text-underline-offset:2px}.app{min-height:100dvh;padding-top:calc(var(--safe-top) + 4px)}.eyebrow{margin:0;font-size:11px;font-weight:600;letter-spacing:.2em;text-transform:uppercase;color:var(--app-ink)}.display{margin:0;font-family:var(--font-display);font-weight:400;font-size:40px;line-height:1.08;letter-spacing:-.5px}.muted{color:var(--app-muted)}.rule{height:0;border:0;border-top:.5px solid var(--app-rule);margin:0}.screen{padding:14px var(--gutter) calc(var(--tabbar) + var(--safe-bottom) + 96px);max-width:560px;margin:0 auto}.screen-header{display:flex;justify-content:space-between;align-items:center;margin-bottom:30px}.wordmark{display:grid;width:max-content;font-size:13px;line-height:1.1;letter-spacing:2.6px;font-weight:600}.wordmark small{display:flex;justify-content:space-between;font-size:9px;letter-spacing:0;font-weight:400;opacity:.82}.icon-button{display:grid;place-items:center;width:44px;height:44px;margin-right:-10px;border-radius:50%}.btn-primary{display:flex;align-items:center;justify-content:space-between;gap:14px;width:100%;min-height:50px;padding:0 22px;border-radius:999px;background:var(--app-accent);color:var(--app-on-accent);font-size:13px;font-weight:600;letter-spacing:.16em;text-transform:uppercase}.btn-primary.center{justify-content:center;letter-spacing:.02em;text-transform:none;font-size:15px}.btn-secondary{display:flex;align-items:center;justify-content:center;gap:10px;width:100%;min-height:48px;padding:0 20px;border-radius:999px;border:1px solid var(--app-rule);font-size:15px;font-weight:500}.btn-text{font-size:14px;font-weight:500;text-decoration:underline;text-underline-offset:3px;color:var(--app-muted)}.btn-primary:active,.btn-secondary:active{opacity:.8}.tabbar{position:fixed;z-index:40;left:12px;right:12px;bottom:calc(var(--safe-bottom) + 10px);max-width:420px;margin:0 auto;display:grid;grid-template-columns:repeat(4,1fr);padding:5px;border-radius:999px;border:.5px solid var(--app-rule);background:var(--app-glass);backdrop-filter:blur(18px) saturate(1.3);-webkit-backdrop-filter:blur(18px) saturate(1.3);box-shadow:0 10px 30px #00000047}.tabbar a{display:grid;justify-items:center;gap:3px;padding:7px 0 6px;border-radius:999px;color:var(--app-muted);font-size:10px;font-weight:500;text-decoration:none}.tabbar a.active{color:var(--app-ink);background:#7f7f7f29;font-weight:600}@media (prefers-reduced-transparency: reduce){.tabbar{background:var(--app-bg);backdrop-filter:none;-webkit-backdrop-filter:none}}.mini-player{position:fixed;z-index:39;left:16px;right:16px;bottom:calc(var(--safe-bottom) + var(--tabbar) + 20px);max-width:410px;margin:0 auto;display:grid;grid-template-columns:40px 1fr auto auto;align-items:center;gap:12px;padding:8px 10px 8px 8px;border-radius:16px;background:var(--app-card);border:.5px solid var(--app-rule);box-shadow:0 10px 30px #0000004d}.mini-player img{width:40px;height:54px;object-fit:cover;border-radius:4px}.mini-player-title{min-width:0;text-align:left}.mini-player-title strong{display:block;font-size:14px;font-weight:600;white-space:nowrap;overflow:hidden;text-overflow:ellipsis}.mini-player-title span{font-size:12px;color:var(--app-muted)}.mini-player .round{width:40px;height:40px;display:grid;place-items:center;border-radius:50%}.library-hero{text-align:center}.library-hero .display{margin:12px 0 28px}.cover-row{display:grid;grid-template-columns:1fr auto 1fr;align-items:end;gap:12px}.cover-row img{display:block;width:min(52vw,210px);aspect-ratio:2/3;object-fit:cover;border-radius:4px;box-shadow:0 22px 50px #00000080}.cover-meta{font-size:10px;font-weight:600;letter-spacing:.18em;line-height:1.7;text-transform:uppercase;padding-bottom:6px;border-bottom:1px solid var(--app-ink);width:max-content}.cover-meta.left{justify-self:start;text-align:left}.cover-meta.right{justify-self:end;text-align:right}.continue{margin:34px 0 0}.book-progress{margin-top:18px;height:2px;background:var(--app-rule);border-radius:2px;overflow:hidden}.book-progress span{display:block;height:100%;background:var(--app-ink)}.progress-caption{margin:12px 0 0;text-align:center;font-size:10px;font-weight:500;letter-spacing:.16em;text-transform:uppercase;color:var(--app-muted)}.contents{margin-top:44px}.contents .eyebrow{margin-bottom:14px}.contents .eyebrow.contents-part{margin-top:32px}.chapter-row{display:grid;grid-template-columns:28px 1fr auto;align-items:center;gap:6px;width:100%;padding:16px 0;border-top:.5px solid var(--app-rule);text-align:left}.chapter-row:last-child{border-bottom:.5px solid var(--app-rule)}.chapter-row .num{font-size:11px;color:var(--app-muted);font-variant-numeric:tabular-nums}.chapter-row h3{margin:0 0 4px;font-family:var(--font-display);font-weight:400;font-size:19px;line-height:1.25}.chapter-row small{font-size:12px;color:var(--app-muted)}.chapter-row[aria-disabled=true]{opacity:.42}.chapter-state{width:22px;height:22px;display:grid;place-items:center;color:var(--app-muted)}.install-card{margin-top:32px;padding:20px;border-radius:18px;background:var(--app-card);border:.5px solid var(--app-rule)}.install-card h2{margin:6px 0 8px;font-family:var(--font-display);font-weight:400;font-size:24px;line-height:1.15}.install-card p{margin:0 0 14px;font-size:14px;line-height:1.55;color:var(--app-muted)}.install-steps{list-style:none;margin:0 0 16px;padding:0;display:grid;gap:12px}.install-steps 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14px;border-radius:3px;background:var(--app-rule)}.sheet-backdrop.light{background:#0000001f}.sheet-head{position:sticky;top:-10px;z-index:1;display:flex;align-items:flex-start;justify-content:space-between;gap:12px;margin:0 calc(-1 * var(--gutter)) 6px;padding:4px var(--gutter) 10px;background:var(--app-card)}.sheet-eyebrow{margin:4px 0 6px;font-size:10px;font-weight:600;letter-spacing:.2em;text-transform:uppercase;color:var(--app-muted)}.sheet h2{margin:4px 0 6px;font-family:var(--font-display);font-weight:400;font-size:26px}.sheet-close{flex:none;width:36px;height:36px;margin-top:2px;display:grid;place-items:center;border-radius:50%;background:color-mix(in srgb,var(--app-ink) 9%,transparent);color:var(--app-ink)}@keyframes rise{0%{transform:translateY(40px);opacity:0}}@keyframes fade{0%{opacity:0}}@media (prefers-reduced-motion: reduce){.sheet,.sheet-backdrop{animation:none}}.notes-group{margin-top:30px}.note-item{padding:18px 0;border-bottom:.5px solid var(--app-rule)}.note-item 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var(--app-rule);background:var(--app-bg);color:var(--app-ink);font:16px/1.5 var(--font-ui);resize:vertical}input.field{width:100%;height:50px;padding:0 16px;border-radius:14px;border:.5px solid var(--app-rule);background:var(--app-bg);color:var(--app-ink);font:16px var(--font-ui)}.note-actions a{text-decoration:none}.chapter-row .num{align-self:start;padding-top:5px}.form-error{margin:8px 0 16px;font-size:13px;line-height:1.45;color:var(--app-danger, #d9534f)}