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rgba(83,224,118,.11);border-radius:50%;pointer-events:none}.books-hero-orbit-one{top:-190px;right:-120px;width:520px;height:520px}.books-hero-orbit-two{right:90px;bottom:-330px;width:600px;height:600px}.books-notice{display:flex;align-items:center;gap:10px;margin-top:-38px;padding:13px 16px;border:1px solid rgba(83,224,118,.24);border-radius:12px;background:#53e07614;color:var(--on-surface);font-size:.86rem;font-weight:650}.books-notice .material-symbols-outlined{color:var(--primary);font-size:20px}.books-collection{display:grid;gap:24px}.books-collection-header{display:flex;align-items:end;justify-content:space-between;gap:20px}.books-section-label{margin:0 0 7px;color:var(--primary);font-size:.68rem;font-weight:850;letter-spacing:.17em;text-transform:uppercase}.books-collection-header h2{margin:0;color:var(--on-surface);font-size:clamp(1.55rem,3vw,2.15rem);font-weight:850;letter-spacing:-.035em}.books-count-pill{padding:8px 13px;border:1px solid rgba(82,104,91,.14);border-radius:var(--radius-full);background:var(--surface-low);color:var(--on-surface-var);font-size:.72rem;font-weight:750}.book-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(330px,1fr));gap:20px}.book-card{position:relative;min-width:0}.book-delete-form{position:absolute;top:10px;right:10px;z-index:1}.book-delete{display:inline-flex;align-items:center;justify-content:center;width:32px;height:32px;padding:0;border:0;border-radius:9px;background:#0c121c8c;color:var(--on-surface-variant, #bccbb9);cursor:pointer;opacity:0;transition:opacity .12s ease,background .12s ease,color .12s ease}.book-delete .material-symbols-outlined{font-size:19px}.book-card:hover .book-delete,.book-delete:focus-visible{opacity:1}.book-delete:hover,.book-delete:focus-visible{background:#ba1a1ad9;color:#fff}@media(pointer:coarse){.book-delete{opacity:1}}.book-card-link{display:grid;grid-template-columns:112px 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.book-cover{transform:rotate(-1.5deg) translateY(-2px)}.book-cover:after{content:"";position:absolute;z-index:2;inset:0;background:linear-gradient(115deg,rgba(255,255,255,.1),transparent 30%,rgba(0,0,0,.09));pointer-events:none}.book-cover-1{background:linear-gradient(155deg,#1d8462,#0b3c3d)}.book-cover-2{background:linear-gradient(155deg,#6553b9,#262a68)}.book-cover-3{background:linear-gradient(155deg,#bc5b4a,#663236)}.book-cover-4{background:linear-gradient(155deg,#2f779d,#173752)}.book-cover-preview{position:absolute;z-index:1;inset:0;width:100%;height:100%;opacity:0;object-fit:cover;object-position:top center;background:#fff;transition:opacity var(--dur-slow)}.book-cover-preview.is-rendered{opacity:1}.book-cover-mark{align-self:flex-end;display:grid;width:25px;height:25px;place-items:center;border:1px solid rgba(255,255,255,.44);border-radius:50%;font-size:.65rem;font-weight:900}.book-cover-title{display:-webkit-box;margin-top:auto;overflow:hidden;font-family:var(--font-serif);font-size:.8rem;font-weight:700;line-height:1.25;-webkit-box-orient:vertical;-webkit-line-clamp:3}.book-cover-rule{width:24px;height:2px;margin:10px 0 7px;background:#ffffffb8}.book-cover-type{font-size:.48rem;font-weight:800;letter-spacing:.12em;text-transform:uppercase}.book-card-content{display:flex;flex-direction:column;min-width:0}.book-card-topline,.book-card-footer,.book-format,.book-page-count,.book-read-action{display:flex;align-items:center}.book-card-topline{justify-content:space-between;gap:10px}.book-format{gap:4px;color:#ff9c9c;font-size:.65rem;font-weight:850;letter-spacing:.1em}.book-format .material-symbols-outlined{font-size:15px}.book-added{overflow:hidden;color:var(--on-surface-var);font-size:.66rem;font-weight:650;text-overflow:ellipsis;white-space:nowrap}.book-title{display:-webkit-box;margin:21px 0 12px;overflow:hidden;color:var(--on-surface);font-size:1.08rem;font-weight:820;letter-spacing:-.018em;line-height:1.35;-webkit-box-orient:vertical;-webkit-line-clamp:2}.book-card-footer{justify-content:space-between;gap:12px;margin-top:auto}.book-page-count{gap:6px;color:var(--on-surface-var);font-size:.72rem;font-weight:700}.book-page-count .material-symbols-outlined{color:var(--on-surface-var);font-size:17px}.book-read-action{gap:5px;color:var(--primary);font-size:.72rem;font-weight:850}.book-read-action .material-symbols-outlined{font-size:16px;transition:transform var(--dur-fast)}.book-card-link:hover .book-read-action .material-symbols-outlined{transform:translate(3px)}.books-empty-state{grid-column:1 / -1;display:grid;justify-items:center;min-height:320px;place-content:center;padding:46px 24px;border:1px dashed rgba(83,224,118,.27);border-radius:20px;background:radial-gradient(circle at 50% 0%,rgba(83,224,118,.09),transparent 44%),var(--surface-low);text-align:center}.books-empty-icon{display:grid;width:64px;height:64px;margin-bottom:18px;place-items:center;border-radius:18px;background:#53e0761a;color:var(--primary);transform:rotate(-4deg)}.books-empty-icon .material-symbols-outlined{font-size:31px}.books-empty-state h3{margin:0;color:var(--on-surface);font-size:1.25rem;font-weight:850}.books-empty-state p{max-width:470px;margin:10px 0 22px;color:var(--on-surface-var);font-size:.88rem;line-height:1.65}.books-empty-action{display:inline-flex;align-items:center;gap:7px;color:var(--primary);font-size:.8rem;font-weight:850;cursor:pointer}.books-empty-action .material-symbols-outlined{font-size:17px}.pdf-reader-shell{position:relative;display:flex;flex-direction:column;gap:12px}.reader-antiforgery{display:none}.reader-workspace{display:grid;grid-template-columns:minmax(0,1fr);gap:16px;min-width:0}.reader-workspace.is-split{grid-template-columns:minmax(0,1fr) minmax(320px,1fr)}.pdf-canvas-wrap{position:relative;display:flex;align-items:center;justify-content:center;width:100%;height:calc(100vh - 120px);min-height:420px;overflow:auto;padding:24px;border:1px solid var(--outline-variant);border-radius:16px;background:radial-gradient(circle at top,var(--surface) 0%,var(--background) 100%);text-align:center;scroll-behavior:smooth}.pdf-page-surface{position:relative;flex:0 0 auto;margin:auto;overflow:hidden;border-radius:4px;background:#fff;box-shadow:0 22px 48px #0f172a33}.pdf-page-surface 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:is(span,br){position:absolute;margin:0;padding:0;color:transparent;white-space:pre;cursor:text;transform-origin:0 0}.textLayer>:not(.markedContent),.textLayer .markedContent span:not(.markedContent){z-index:1}.textLayer span.markedContent{top:0;height:0}.textLayer span[role=img]{user-select:none;cursor:default}.textLayer ::selection{background:transparent;color:transparent}.textLayer span.is-linked-source{background:transparent}.textLayer br::selection{background:transparent}.textLayer .endOfContent{display:block;position:absolute;inset:100% 0 0;z-index:0;cursor:default;user-select:none}.textLayer.selecting .endOfContent{top:0}.reader-translation-pane{min-width:0;height:calc(100vh - 120px);min-height:420px;overflow:auto;border:1px solid var(--outline-variant);border-radius:16px;background:var(--surface);box-shadow:0 18px 42px #010e2438}.reader-translation-heading{position:sticky;top:0;z-index:2;display:flex;align-items:center;justify-content:space-between;gap:16px;padding:18px 22px;border-bottom:1px solid var(--outline-variant);background:color-mix(in srgb,var(--surface) 92%,transparent);backdrop-filter:blur(12px)}.reader-translation-heading div{display:grid;gap:2px}.reader-translation-heading span,.reader-translation-heading small{color:var(--on-surface-var);font-size:11px;font-weight:750}.reader-translation-heading strong{color:var(--on-surface);font-size:16px}.reader-translation-state{margin:22px;padding:18px;border-radius:10px;background:var(--surface-low);color:var(--on-surface-var);font-size:14px;line-height:1.5}.reader-translation-state.is-error{color:var(--error)}.reader-translation-content{padding:clamp(24px,4vw,48px);color:var(--on-surface);font-family:Georgia,Times New Roman,serif;font-size:clamp(17px,1.35vw,21px);line-height:1.75;text-align:left}.reader-translation-paragraph{margin:0 0 1.15em}.reader-translation-segment{border-radius:4px;cursor:text;transition:background .16s ease,color .16s ease}.reader-translation-segment:hover,.reader-translation-segment.is-linked,.reader-translation-segment.is-reading{background:color-mix(in srgb,var(--primary) 20%,transparent)}.reader-translation-segment.is-reading{box-shadow:0 0 0 2px color-mix(in srgb,var(--primary) 16%,transparent)}.reader-nav-arrow{position:absolute;top:50%;transform:translateY(-50%);z-index:6;display:inline-flex;align-items:center;justify-content:center;width:58px;height:58px;border-radius:9999px;border:1px solid var(--outline-variant);background:color-mix(in srgb,var(--surface) 88%,transparent);color:var(--on-surface);cursor:pointer;box-shadow:0 14px 34px #0f172a3d;backdrop-filter:blur(8px);transition:transform .16s ease,background .16s ease,color .16s ease,opacity .16s ease}.reader-nav-prev{left:22px}.reader-nav-next{right:22px}.reader-nav-arrow:hover:not(:disabled){background:var(--primary);color:var(--on-primary, #ffffff);transform:translateY(-50%) scale(1.08)}.reader-nav-arrow:focus-visible{outline:3px solid color-mix(in srgb,var(--primary) 45%,transparent);outline-offset:3px}.reader-nav-arrow:disabled{opacity:.3;pointer-events:none;box-shadow:none}.reader-nav-arrow .material-symbols-outlined{font-size:32px}.reader-page-pill{position:absolute;bottom:20px;left:50%;transform:translate(-50%);z-index:6;padding:8px 20px;border-radius:9999px;background:#0f172acc;color:#fff;font-weight:700;font-size:.9rem;letter-spacing:.01em;box-shadow:0 12px 30px #0f172a52;backdrop-filter:blur(4px);pointer-events:none}.reader-tts-live{position:absolute;bottom:66px;left:50%;z-index:7;max-width:min(420px,calc(100vw - 32px));transform:translate(-50%);overflow:hidden;padding:7px 14px;border:1px solid rgba(255,255,255,.14);border-radius:9999px;background:#0f172adb;color:#ffffffeb;font-size:12px;font-weight:750;text-overflow:ellipsis;white-space:nowrap;box-shadow:0 10px 26px #0f172a4d;backdrop-filter:blur(8px);pointer-events:none}.reader-tts-live.is-error{border-color:color-mix(in srgb,var(--error) 55%,transparent);color:var(--error)}.reader-back{position:absolute;top:16px;left:16px;z-index:7;display:inline-flex;align-items:center;gap:6px;height:40px;padding:0 16px 0 12px;border-radius:9999px;background:#0f172ad1;color:#ffffffeb;font-weight:700;font-size:.85rem;text-decoration:none;box-shadow:0 12px 30px #0f172a57;backdrop-filter:blur(8px);transition:background .15s ease,color .15s ease,transform .15s ease}.reader-back:hover{background:var(--primary);color:var(--on-primary, #ffffff);transform:translateY(-1px)}.reader-back:focus-visible{outline:3px solid color-mix(in srgb,var(--primary) 45%,transparent);outline-offset:3px}.reader-back .material-symbols-outlined{font-size:20px}.reader-tools{position:absolute;top:16px;left:50%;transform:translate(-50%);z-index:7;display:inline-flex;align-items:center;gap:2px;padding:6px;border-radius:9999px;background:#0f172ad1;box-shadow:0 12px 30px #0f172a57;backdrop-filter:blur(8px)}.reader-translation-tools{position:absolute;top:68px;right:16px;z-index:8;display:inline-flex;align-items:center;gap:2px;padding:6px;border-radius:9999px;background:#0f172ad1;box-shadow:0 12px 30px #0f172a57;backdrop-filter:blur(8px)}.reader-translation-toggle{gap:6px;border:1px solid rgba(255,255,255,.16);padding-left:9px;padding-right:7px}.reader-translation-status{min-width:32px;padding:3px 8px;border-radius:9999px;background:#ffffff1f;color:#ffffffc2;font-size:10px;font-weight:850;line-height:1.2;text-align:center;text-transform:uppercase;letter-spacing:.04em}.reader-translation-toggle.is-active .reader-translation-status{background:#fff3;color:currentColor}.reader-tool.reader-translation-toggle[data-translation-state=translating]{background:color-mix(in srgb,var(--primary) 72%,#0f172a)}.reader-translation-toggle[data-translation-state=translating] [data-translation-toggle-icon]{animation:reader-translation-spin .9s linear 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button.is-active{background:var(--primary);color:var(--on-primary)}.reader-selection-popover{position:fixed;z-index:1400;width:min(340px,calc(100vw - 24px));padding:12px 14px;border:1px solid var(--outline-variant);border-radius:12px;background:var(--surface);color:var(--on-surface);box-shadow:0 20px 54px #00000075;pointer-events:none}.reader-selection-popover [data-hover-translation]{display:block;font-size:16px;line-height:1.5}.reader-tool{display:inline-flex;align-items:center;justify-content:center;min-width:40px;height:40px;padding:0 10px;border:none;border-radius:9999px;background:transparent;color:#ffffffeb;font:inherit;font-weight:700;font-size:.85rem;cursor:pointer;transition:background .15s ease,color .15s ease,opacity .15s ease}.reader-tool:hover:not(:disabled){background:#ffffff29}.reader-tool:focus-visible{outline:2px solid 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(max-width:1250px){.reader-translation-label,.reader-split-label{display:none}}@media(max-width:980px){.books-library-hero{grid-template-columns:1fr}.books-upload-card{max-width:560px}}@media(max-width:620px){.books-page{gap:36px;padding-bottom:24px}.books-library-hero{margin-inline:-8px;padding:30px 20px 22px;border-radius:22px}.books-hero-title{font-size:clamp(2.45rem,13vw,3.35rem)}.books-hero-description{line-height:1.6}.books-library-stats{margin-top:26px}.books-upload-card{padding:18px}.books-file-browse{display:none}.books-collection-header{align-items:start;flex-direction:column;gap:12px}.book-grid{grid-template-columns:1fr}.book-card-link{grid-template-columns:92px minmax(0,1fr);gap:15px;min-height:168px;padding:14px}.book-title{margin-top:15px}.book-added{display:none}.book-read-action{width:32px;height:32px;justify-content:center;border-radius:50%;background:#53e0761a;font-size:0}.books-notice{margin-top:-18px}}@media(prefers-reduced-motion:reduce){.book-card-link,.book-cover,.book-read-action .material-symbols-outlined,.books-upload-button{transition:none}}@media(max-width:900px),(pointer:coarse){.field-input,.form-input,.form-textarea,.assistant-composer .form-textarea,.assistant-context-picker select,.assistant-model-picker select{font-size:16px}}@supports (min-height: 100dvh){.auth-body,.app-shell{min-height:100dvh}.app-sidebar{height:100dvh}}.flashcard{position:relative;touch-action:pan-y}.flashcard.is-dragging{animation:none;transition:none}.flashcard.is-swipe-out-left,.flashcard.is-swipe-out-right{animation:none;pointer-events:none;transition:transform .22s ease-in,opacity .22s 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