:root{--bg-primary: #f5f5f7;--bg-secondary: #ffffff;--bg-tertiary: #f0f0f3;--bg-glass: rgba(255, 255, 255, .72);--bg-glass-hover: rgba(255, 255, 255, .88);--text-primary: #1d1d1f;--text-secondary: #6e6e73;--text-tertiary: #86868b;--border-color: #d2d2d7;--border-light: #e8e8ed;--primary: #6366f1;--primary-hover: #4f46e5;--primary-soft: rgba(99, 102, 241, .1);--danger: #ef4444;--success: #22c55e;--shadow-sm: 0 1px 3px rgba(0, 0, 0, .04), 0 1px 2px rgba(0, 0, 0, .06);--shadow-md: 0 4px 16px rgba(0, 0, 0, .07);--shadow-lg: 0 8px 32px rgba(0, 0, 0, .1);--shadow-glow: 0 0 40px rgba(99, 102, 241, .12);--radius-sm: 8px;--radius-md: 12px;--radius-lg: 16px;--radius-xl: 24px;--transition-fast: .15s ease;--transition-normal: .3s ease;--transition-slow: .5s ease}[data-theme=dark]{--bg-primary: #0b0b12;--bg-secondary: #151520;--bg-tertiary: #1c1c2a;--bg-glass: rgba(21, 21, 32, .78);--bg-glass-hover: rgba(28, 28, 42, .9);--text-primary: #f0f0f3;--text-secondary: #a1a1aa;--text-tertiary: #6e6e7a;--border-color: #2a2a3a;--border-light: #222233;--primary: #818cf8;--primary-hover: #6366f1;--primary-soft: rgba(129, 140, 248, .12);--shadow-sm: 0 1px 3px rgba(0, 0, 0, .2);--shadow-md: 0 4px 16px rgba(0, 0, 0, .3);--shadow-lg: 0 8px 32px rgba(0, 0, 0, .4);--shadow-glow: 0 0 50px rgba(129, 140, 248, .08)}*,*:before,*:after{box-sizing:border-box;margin:0;padding:0}html{scroll-behavior:smooth}body{font-family:-apple-system,BlinkMacSystemFont,Segoe UI,system-ui,sans-serif;line-height:1.6;color:var(--text-primary);background-color:var(--bg-primary);min-height:100vh;font-synthesis:none;text-rendering:optimizeLegibility;-webkit-font-smoothing:antialiased;-moz-osx-font-smoothing:grayscale;transition:background-color var(--transition-normal),color var(--transition-normal)}a{color:var(--primary);text-decoration:none}a:hover{text-decoration:underline}.login-page{min-height:100vh;display:flex;align-items:center;justify-content:center;padding:24px;background:radial-gradient(ellipse at 20% 50%,rgba(99,102,241,.06) 0%,transparent 50%),radial-gradient(ellipse at 80% 20%,rgba(139,92,246,.05) 0%,transparent 50%),var(--bg-primary);animation:fadeIn .6s ease-out}.login-card{width:100%;max-width:420px;background:var(--bg-secondary);border:1px solid var(--border-light);border-radius:var(--radius-xl);padding:40px 36px;box-shadow:var(--shadow-lg);transition:background-color var(--transition-normal),border-color var(--transition-normal)}.login-header{text-align:center;margin-bottom:32px}.login-header h1{font-size:2rem;font-weight:700;letter-spacing:-.02em;margin-bottom:6px;background:linear-gradient(135deg,var(--primary) 0%,#a855f7 100%);-webkit-background-clip:text;-webkit-text-fill-color:transparent;background-clip:text}.login-header p{color:var(--text-secondary);font-size:.92rem}.btn-google{display:flex;align-items:center;justify-content:center;gap:10px;width:100%;padding:12px 16px;border:1px solid var(--border-color);border-radius:var(--radius-md);background:var(--bg-secondary);color:var(--text-primary);font-size:.95rem;font-weight:500;cursor:pointer;transition:all var(--transition-fast)}.btn-google:hover{background:var(--bg-tertiary);border-color:var(--text-tertiary)}.btn-google svg{width:20px;height:20px;flex-shrink:0}.login-divider{display:flex;align-items:center;gap:14px;margin:22px 0;color:var(--text-tertiary);font-size:.8rem;text-transform:uppercase;letter-spacing:.05em}.login-divider:before,.login-divider:after{content:"";flex:1;height:1px;background:var(--border-light)}.email-form{display:flex;flex-direction:column;gap:12px}.email-form input{width:100%;padding:11px 14px;border:1px solid var(--border-color);border-radius:var(--radius-sm);background:var(--bg-primary);color:var(--text-primary);font-size:.95rem;outline:none;transition:border-color var(--transition-fast),box-shadow var(--transition-fast)}.email-form input:focus{border-color:var(--primary);box-shadow:0 0 0 3px var(--primary-soft)}.email-form input::placeholder{color:var(--text-tertiary)}.email-actions{display:flex;gap:10px}.email-actions button{flex:1;padding:11px 16px;border-radius:var(--radius-sm);font-size:.95rem;font-weight:500;cursor:pointer;transition:all var(--transition-fast)}.btn-email-signin{background:var(--primary);color:#fff;border:none}.btn-email-signin:hover{background:var(--primary-hover)}.btn-email-signup{background:transparent;color:var(--primary);border:1px solid var(--primary)}.btn-email-signup:hover{background:var(--primary-soft)}.btn-guest{display:block;width:100%;padding:10px;background:none;border:none;color:var(--text-secondary);font-size:.9rem;cursor:pointer;transition:color var(--transition-fast)}.btn-guest:hover{color:var(--primary)}.login-error{color:var(--danger);font-size:.85rem;text-align:center;margin-top:8px}.theme-corner{position:fixed;bottom:24px;right:24px}.auth-bar{position:fixed;top:0;left:0;right:0;z-index:100;display:flex;align-items:center;justify-content:space-between;padding:0 24px;height:56px;background:var(--bg-glass);backdrop-filter:blur(20px);-webkit-backdrop-filter:blur(20px);border-bottom:1px solid var(--border-light);transition:background-color var(--transition-normal),border-color var(--transition-normal)}.auth-logo{display:flex;align-items:center;gap:8px;font-size:1.15rem;font-weight:700;letter-spacing:-.02em;color:var(--text-primary);text-decoration:none;background:linear-gradient(135deg,var(--primary) 0%,#a855f7 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var(--transition-fast);border:none}.btn-nav-primary{background:var(--primary);color:#fff}.btn-nav-primary:hover{background:var(--primary-hover)}.btn-nav-ghost{background:transparent;color:var(--text-secondary)}.btn-nav-ghost:hover{color:var(--primary);background:var(--primary-soft)}.drawer-overlay{position:fixed;inset:0;z-index:200;background:#0000004d;animation:fadeIn .2s ease-out}.drawer{position:fixed;top:0;right:0;bottom:0;width:380px;max-width:100vw;background:var(--bg-secondary);border-left:1px solid var(--border-light);box-shadow:-4px 0 24px #0000001f;display:flex;flex-direction:column;animation:slideInRight .25s ease-out;z-index:201}@keyframes slideInRight{0%{transform:translate(100%)}to{transform:translate(0)}}.drawer-header{display:flex;align-items:center;justify-content:space-between;padding:16px 20px;border-bottom:1px solid 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var(--border-light);background:var(--bg-primary);transition:border-color var(--transition-fast),box-shadow var(--transition-fast)}.drawer-item:hover{border-color:var(--primary);box-shadow:0 0 0 2px var(--primary-soft)}.drawer-item-link,.drawer-item-static{display:block;padding:12px 14px;text-decoration:none;color:inherit}.drawer-item-link:hover{text-decoration:none}.drawer-item-inner{display:flex;flex-direction:column;gap:6px}.drawer-item-top{display:flex;align-items:center;justify-content:space-between}.drawer-status{font-size:.72rem;font-weight:600;text-transform:uppercase;letter-spacing:.04em;padding:2px 8px;border-radius:999px}.status-complete{background:#22c55e1a;color:#16a34a}[data-theme=dark] .status-complete{background:#22c55e26;color:#4ade80}.status-processing{background:#6366f11a;color:var(--primary)}.status-error{background:#ef44441a;color:#dc2626}[data-theme=dark] .status-error{background:#ef444426;color:#f87171}.drawer-date{font-size:.75rem;color:var(--text-tertiary)}.drawer-item-paper{font-size:.88rem;font-weight:500;color:var(--text-primary);white-space:nowrap;overflow:hidden;text-overflow:ellipsis;margin:0}.drawer-item-meta{display:flex;gap:6px}.drawer-chip{font-size:.72rem;padding:2px 8px;border-radius:999px;background:var(--bg-tertiary);color:var(--text-secondary);border:1px solid var(--border-light)}.drawer-load-more{display:block;width:100%;margin-top:12px;padding:10px;border:1px solid var(--border-light);border-radius:var(--radius-sm);background:var(--bg-primary);color:var(--text-secondary);font-size:.85rem;font-weight:500;cursor:pointer;transition:all var(--transition-fast)}.drawer-load-more:hover:not(:disabled){border-color:var(--primary);color:var(--primary);background:var(--primary-soft)}.drawer-load-more:disabled{opacity:.6;cursor:not-allowed}.home-page{position:relative;min-height:100vh;overflow:hidden}.home-hero{position:relative;min-height:100vh;display:flex;align-items:center;justify-content:center;animation:fadeIn .5s ease-out}.home-center{position:relative;z-index:10;width:100%;max-width:520px;padding:24px}.hero-content{text-align:center;margin-bottom:28px}.hero-title{font-size:2.8rem;font-weight:800;letter-spacing:-.03em;line-height:1.1;margin-bottom:10px;background:linear-gradient(135deg,var(--primary) 0%,#a855f7 50%,#ec4899 100%);-webkit-background-clip:text;-webkit-text-fill-color:transparent;background-clip:text}.hero-tagline{color:var(--text-secondary);font-size:1.05rem;line-height:1.5}.floating-papers{position:fixed;inset:0;z-index:1;pointer-events:none;overflow:hidden;-webkit-mask-image:radial-gradient(ellipse 360px 320px at 50% 50%,transparent 70%,black 100%);mask-image:radial-gradient(ellipse 360px 320px at 50% 50%,transparent 70%,black 100%)}.floating-card{position:absolute;pointer-events:auto;width:320px;padding:14px 16px;background:var(--bg-glass);backdrop-filter:blur(12px);-webkit-backdrop-filter:blur(12px);border:1px solid var(--border-light);border-radius:var(--radius-md);box-shadow:var(--shadow-sm);cursor:pointer;text-decoration:none;color:var(--text-primary);transition:transform var(--transition-fast),box-shadow var(--transition-fast),background-color var(--transition-normal),border-color var(--transition-normal)}.floating-card:hover{transform:scale(1.05)!important;box-shadow:var(--shadow-md);background:var(--bg-glass-hover);text-decoration:none;color:var(--text-primary);z-index:20}.floating-card-header{display:flex;align-items:center;gap:8px;margin-bottom:8px}.field-badge{display:inline-flex;align-items:center;justify-content:center;width:26px;height:26px;border-radius:6px;font-size:.65rem;font-weight:700;color:#fff;flex-shrink:0;letter-spacing:.02em}.field-icon{width:28px;height:28px;border-radius:6px;flex-shrink:0;object-fit:contain}.floating-card-field{font-size:.75rem;font-weight:600;white-space:nowrap;overflow:hidden;text-overflow:ellipsis}.floating-card-title{display:-webkit-box;-webkit-box-orient:vertical;-webkit-line-clamp:3;font-size:.82rem;font-weight:500;color:var(--text-primary);line-height:1.35;margin-bottom:4px;overflow:hidden}.floating-card-paper{display:block;font-size:.7rem;color:var(--text-secondary);line-height:1.3;margin-bottom:6px;white-space:nowrap;overflow:hidden;text-overflow:ellipsis}.floating-card-meta{display:block;font-size:.72rem;color:var(--text-tertiary)}.floating-tier-0{opacity:1;z-index:4}.floating-tier-1{opacity:.82;z-index:3;transform:scale(.93)}.floating-tier-2{opacity:.62;z-index:2;transform:scale(.86)}.float-anim-a{animation:floatA var(--float-dur, 7s) ease-in-out infinite;animation-delay:var(--float-delay, 0s)}.float-anim-b{animation:floatB var(--float-dur, 7s) ease-in-out infinite;animation-delay:var(--float-delay, 0s)}.float-anim-c{animation:floatC var(--float-dur, 7s) ease-in-out infinite;animation-delay:var(--float-delay, 0s)}@keyframes floatA{0%,to{transform:translateY(0) rotate(0)}50%{transform:translateY(-16px) rotate(1.2deg)}}@keyframes floatB{0%,to{transform:translateY(0) rotate(0)}33%{transform:translateY(-12px) rotate(-1deg)}66%{transform:translateY(8px) rotate(.8deg)}}@keyframes floatC{0%,to{transform:translateY(0) translate(0)}50%{transform:translateY(-10px) translate(8px)}}.skeleton-card{pointer-events:none;cursor:default}.skeleton-line{background:linear-gradient(90deg,var(--border-light) 25%,var(--bg-glass-hover) 50%,var(--border-light) 75%);background-size:200% 100%;animation:shimmer 1.5s ease-in-out infinite;border-radius:4px}.skeleton-icon{width:28px;height:28px;border-radius:6px;flex-shrink:0}.skeleton-field{width:72px;height:14px}.skeleton-title{width:100%;height:13px;margin-bottom:6px}.skeleton-title-short{width:60%;height:13px;margin-bottom:8px}.skeleton-meta{width:40%;height:11px}@keyframes shimmer{0%{background-position:200% 0}to{background-position:-200% 0}}.paper-uploader{background:var(--bg-secondary);border:1px solid var(--border-color);border-radius:var(--radius-lg);padding:24px;box-shadow:var(--shadow-glow),var(--shadow-md);transition:background-color var(--transition-normal),border-color var(--transition-normal),box-shadow var(--transition-normal)}.paper-uploader:focus-within{border-color:var(--primary);box-shadow:var(--shadow-glow),0 0 0 3px var(--primary-soft)}.input-mode-toggle{display:flex;gap:0;margin-bottom:14px;border:1px solid var(--border-light);border-radius:var(--radius-sm);overflow:hidden}.mode-tab{flex:1;padding:10px 16px;font-size:.88rem;font-weight:500;border:none;background:var(--bg-primary);color:var(--text-secondary);cursor:pointer;transition:background-color var(--transition-fast),color var(--transition-fast)}.mode-tab:hover:not(:disabled){background:var(--bg-tertiary)}.mode-tab--active{background:var(--primary-soft);color:var(--primary)}.mode-tab:disabled{opacity:.5;cursor:not-allowed}.found-paper-title{font-size:.85rem;color:var(--text-secondary);margin-bottom:10px;padding:8px 12px;background:var(--primary-soft);border-radius:var(--radius-sm);line-height:1.4}.found-paper-title strong{color:var(--text-primary)}.uploader-url{width:100%;padding:14px 16px;border:1px solid var(--border-light);border-radius:var(--radius-sm);background:var(--bg-primary);color:var(--text-primary);font-size:1rem;outline:none;transition:border-color var(--transition-fast),box-shadow var(--transition-fast)}.uploader-url:focus{border-color:var(--primary);box-shadow:0 0 0 3px var(--primary-soft)}.uploader-url::placeholder{color:var(--text-tertiary)}.uploader-hint{margin-top:8px;font-size:.78rem;color:var(--text-tertiary);line-height:1.4}.uploader-options{display:flex;flex-direction:column;gap:12px;margin-top:14px}.option-group{border:none;margin:0;padding:0}.option-label{font-size:.78rem;color:var(--text-tertiary);margin-bottom:6px;font-weight:500}.option-chips{display:flex;gap:8px;flex-wrap:wrap}.option-chip{padding:7px 14px;border:1px solid var(--border-light);border-radius:999px;background:var(--bg-primary);color:var(--text-secondary);font-size:.85rem;cursor:pointer;transition:border-color var(--transition-fast),background var(--transition-fast),color var(--transition-fast)}.option-chip:hover:not(:disabled){border-color:var(--primary);color:var(--text-primary)}.option-chip--active{background:var(--primary-soft);border-color:var(--primary);color:var(--primary);font-weight:600}.option-group:disabled .option-chip{opacity:.5;cursor:not-allowed}.uploader-submit{margin-top:16px;width:100%;padding:13px 24px;background:linear-gradient(135deg,var(--primary) 0%,#7c3aed 100%);color:#fff;border:none;border-radius:var(--radius-sm);font-size:1rem;font-weight:600;cursor:pointer;transition:all var(--transition-fast);position:relative;overflow:hidden}.uploader-submit:hover:not(:disabled){filter:brightness(1.08);transform:translateY(-1px);box-shadow:0 4px 20px #6366f159}.uploader-submit:active:not(:disabled){transform:translateY(0)}.uploader-submit:disabled{opacity:.5;cursor:not-allowed}.uploader-quota{margin-top:10px;font-size:.8rem;color:var(--text-tertiary);text-align:center}.quota-hint{opacity:.75}.uploader-error{margin-top:16px;animation:fadeIn .3s ease-out}.uploader-error-body{display:flex;align-items:flex-start;gap:10px;padding:12px 14px;background:color-mix(in srgb,var(--danger) 8%,var(--bg-primary));border:1px solid color-mix(in srgb,var(--danger) 25%,transparent);border-radius:var(--radius-sm);margin-bottom:12px}.uploader-error-icon{flex-shrink:0;width:22px;height:22px;display:flex;align-items:center;justify-content:center;background:var(--danger);color:#fff;border-radius:50%;font-size:.78rem;font-weight:700;line-height:1}.uploader-error-text{margin:0;color:var(--text-primary);font-size:.9rem;line-height:1.45}.uploader-progress{margin-top:16px;display:flex;flex-direction:column;align-items:center;animation:fadeIn .3s ease-out}.uploader-spinner{width:36px;height:36px;border:3px solid var(--border-light);border-top-color:var(--primary);border-radius:50%;animation:spin .7s linear infinite}@keyframes spin{to{transform:rotate(360deg)}}.uploader-progress-bar{width:100%;height:8px;background:var(--bg-tertiary);border-radius:999px;overflow:hidden}.uploader-progress-fill{height:100%;border-radius:999px;transition:width .5s ease;background:linear-gradient(90deg,var(--primary) 0%,#7c3aed 100%);position:relative;overflow:hidden}.uploader-progress-fill:after{content:"";position:absolute;inset:0;background:linear-gradient(90deg,transparent 0%,rgba(255,255,255,.2) 50%,transparent 100%);animation:shimmer 2s ease-in-out infinite}.uploader-progress-fill--init{opacity:.5;animation:pulse-bar 1.5s ease-in-out infinite}.uploader-progress-fill--init:after{animation-direction:reverse}@keyframes shimmer{0%,to{opacity:0}50%{opacity:1}}@keyframes pulse-bar{0%,to{opacity:.35}50%{opacity:.6}}.uploader-progress-label{margin-top:10px;font-size:.9rem;color:var(--text-secondary);text-align:center}.uploader-progress-step{display:block;margin-top:2px;font-size:.78rem;color:var(--text-tertiary);text-align:center}.story-container{max-width:960px;margin:0 auto;padding:80px 24px 48px;animation:fadeSlideIn .5s ease-out}.story-back{display:inline-flex;align-items:center;gap:6px;padding:8px 16px;margin-bottom:24px;border-radius:var(--radius-sm);background:var(--bg-secondary);border:1px solid var(--border-light);color:var(--text-secondary);font-size:.88rem;cursor:pointer;transition:all var(--transition-fast)}.story-back:hover{color:var(--primary);border-color:var(--primary);background:var(--primary-soft)}.story-viewer{background:var(--bg-secondary);border:1px solid var(--border-light);border-radius:var(--radius-lg);padding:36px;box-shadow:var(--shadow-sm);transition:background-color var(--transition-normal),border-color var(--transition-normal)}.story-header{margin-bottom:28px;padding-bottom:20px;border-bottom:1px solid var(--border-light)}.story-header h1{font-size:1.8rem;font-weight:700;letter-spacing:-.02em;line-height:1.25;margin:0}.story-meta-row{display:flex;flex-wrap:wrap;gap:8px;margin-bottom:8px}.story-meta-tag{display:inline-flex;align-items:center;padding:4px 12px;border-radius:999px;font-size:.78rem;font-weight:600;text-transform:capitalize;background:var(--bg-tertiary);color:var(--text-secondary);border:1px solid var(--border-light)}.story-meta-field{background:var(--primary-soft);color:var(--primary);border-color:transparent}.story-paper-title{color:var(--text-tertiary);font-size:.85rem;margin-top:4px;font-style:italic}.story-paper-title a{color:var(--text-tertiary);text-decoration:underline;text-decoration-color:var(--border-color);text-underline-offset:3px;transition:color var(--transition-fast),text-decoration-color var(--transition-fast)}.story-paper-title a:hover{color:var(--primary);text-decoration-color:var(--primary)}.difficulty-easy{background:#22c55e1a;color:#16a34a;border-color:transparent}[data-theme=dark] .difficulty-easy{background:#22c55e26;color:#4ade80}.difficulty-moderate{background:#eab3081a;color:#a16207;border-color:transparent}[data-theme=dark] .difficulty-moderate{background:#eab30826;color:#facc15}.difficulty-hard{background:#ef44441a;color:#dc2626;border-color:transparent}[data-theme=dark] .difficulty-hard{background:#ef444426;color:#f87171}.difficulty-unknown{display:none}.story-title-row{display:flex;flex-direction:column;align-items:flex-start;gap:8px;margin-bottom:12px}.title-audio-inline{height:32px;width:260px;border-radius:16px}.book-stage{position:relative;display:flex;align-items:stretch;gap:0}.book-arrow{position:absolute;top:50%;transform:translateY(-50%);z-index:10;display:flex;align-items:center;justify-content:center;width:44px;height:44px;border-radius:50%;border:none;background:var(--bg-glass);backdrop-filter:blur(12px);-webkit-backdrop-filter:blur(12px);color:var(--text-primary);cursor:pointer;transition:all var(--transition-fast);box-shadow:var(--shadow-md)}.book-arrow-left{left:-22px}.book-arrow-right{right:-22px}.book-arrow:hover:not(:disabled){background:var(--primary);color:#fff;transform:translateY(-50%) scale(1.08);box-shadow:0 4px 20px #6366f159}.book-arrow:disabled{opacity:0;pointer-events:none}.book-page-area{flex:1;overflow:hidden;border-radius:var(--radius-lg)}.book-track{display:flex;transition:transform .5s cubic-bezier(.22,1,.36,1);will-change:transform}.book-page-slide{width:100%;min-width:100%;flex-shrink:0}.book-page{background:var(--bg-primary);border:1px solid var(--border-light);border-radius:var(--radius-lg);overflow:hidden;display:flex;flex-direction:column}.book-page-conclusion{border-color:var(--primary);border-width:2px;background:linear-gradient(180deg,color-mix(in srgb,var(--primary) 4%,var(--bg-primary)) 0%,var(--bg-primary) 100%)}.book-illustration{width:100%;max-height:480px;overflow:hidden;display:flex;align-items:center;justify-content:center;background:var(--bg-tertiary)}.book-illustration img{width:100%;max-height:480px;object-fit:contain;display:block}.book-text-block{padding:28px 32px 24px;display:flex;flex-direction:column;gap:16px}.book-conclusion-badge{display:inline-flex;align-self:flex-start;padding:5px 14px;border-radius:999px;font-size:.8rem;font-weight:700;letter-spacing:.03em;text-transform:uppercase;background:var(--primary-soft);color:var(--primary);border:1px solid color-mix(in srgb,var(--primary) 25%,transparent)}.book-text{font-size:1.1rem;line-height:1.9;color:var(--text-primary)}.book-audio{width:100%;height:36px;border-radius:var(--radius-sm)}.book-glossary{border-top:1px solid var(--border);padding-top:16px;margin-top:4px}.book-glossary-badge{display:inline-flex;align-self:flex-start;padding:5px 14px;border-radius:999px;font-size:.8rem;font-weight:700;letter-spacing:.03em;text-transform:uppercase;background:var(--primary-soft);color:var(--primary);border:1px solid color-mix(in srgb,var(--primary) 25%,transparent);margin-bottom:12px}.book-glossary-list{display:flex;flex-direction:column;gap:10px;margin:0}.book-glossary-entry{display:flex;flex-direction:column;gap:2px}.book-glossary-entry dt{font-weight:700;font-size:.95rem;color:var(--text-primary)}.book-glossary-entry dd{margin:0;font-size:.9rem;line-height:1.5;color:var(--text-secondary)}.book-read-again{display:inline-flex;align-items:center;align-self:center;gap:8px;margin-top:8px;padding:10px 24px;border:1px solid color-mix(in srgb,var(--primary) 25%,transparent);border-radius:999px;background:var(--primary-soft);color:var(--primary);font-size:.95rem;font-weight:600;cursor:pointer;transition:background .15s,border-color .15s}.book-read-again:hover{background:color-mix(in srgb,var(--primary) 15%,transparent);border-color:color-mix(in srgb,var(--primary) 40%,transparent)}.media-placeholder{position:relative;overflow:hidden;background:var(--bg-tertiary);display:flex;align-items:center;justify-content:center}.media-placeholder-image{width:100%;height:320px;border-radius:var(--radius-md)}.media-placeholder-audio{width:100%;height:36px;border-radius:var(--radius-sm);gap:8px}.media-placeholder-icon{color:var(--text-tertiary);z-index:1;flex-shrink:0}.media-placeholder-label{color:var(--text-tertiary);font-size:.8rem;z-index:1}.media-placeholder-shimmer{position:absolute;inset:0;background:linear-gradient(90deg,transparent 0%,rgba(255,255,255,.06) 40%,rgba(255,255,255,.12) 50%,rgba(255,255,255,.06) 60%,transparent 100%);animation:shimmer 1.8s ease-in-out infinite}@keyframes shimmer{0%{transform:translate(-100%)}to{transform:translate(100%)}}.book-footer{display:flex;flex-direction:column;align-items:center;gap:12px;margin-top:12px}.book-page-num{font-size:.82rem;font-weight:600;color:var(--text-tertiary);letter-spacing:.04em}.book-dots{display:flex;gap:6px;align-items:center}.book-dot{width:8px;height:8px;border-radius:50%;border:none;padding:0;background:var(--border-color);cursor:pointer;transition:all var(--transition-fast)}.book-dot.active{background:var(--primary);width:24px;border-radius:999px}.book-dot:hover:not(.active){background:var(--text-tertiary)}.book-dot-end{background:color-mix(in srgb,var(--primary) 30%,var(--border-color))}.book-dot-end.active{background:var(--primary)}.glossary-word{position:relative;text-decoration:underline;text-decoration-style:dotted;text-decoration-color:var(--primary);text-underline-offset:3px;cursor:help;color:var(--primary);font-weight:500}.glossary-tip{background:var(--bg-tertiary);color:var(--text-primary);border:1px solid var(--border-color);padding:8px 12px;border-radius:var(--radius-sm);font-size:.82rem;font-weight:400;line-height:1.45;white-space:normal;box-shadow:var(--shadow-md);pointer-events:none;z-index:100;animation:glossary-fade-in .15s ease}@keyframes glossary-fade-in{0%{opacity:0;transform:scale(.96)}to{opacity:1;transform:scale(1)}}.vote-buttons{display:flex;gap:8px;margin-top:14px}.vote-btn{display:inline-flex;align-items:center;gap:6px;padding:6px 14px;border-radius:20px;border:1px solid var(--border-color);background:var(--bg-primary);color:var(--text-secondary);font-size:.85rem;font-weight:500;cursor:pointer;transition:all var(--transition-fast)}.vote-btn:hover:not(:disabled){border-color:var(--text-tertiary)}.vote-up.active{background:#22c55e1a;border-color:#22c55e;color:#16a34a}[data-theme=dark] .vote-up.active{background:#22c55e26;color:#4ade80}.vote-down.active{background:#ef44441a;border-color:#ef4444;color:#dc2626}[data-theme=dark] .vote-down.active{background:#ef444426;color:#f87171}.vote-btn:disabled{opacity:.6;cursor:not-allowed}.story-actions-row{display:flex;align-items:center;gap:12px;margin-top:14px}.story-actions-row .vote-buttons{margin-top:0}.regen-btn{color:var(--accent-color);border-color:var(--accent-color)}.regen-btn:hover:not(:disabled){background:#6366f114;border-color:var(--accent-color)!important}[data-theme=dark] .regen-btn:hover:not(:disabled){background:#818cf81f}.regen-overlay{position:fixed;inset:0;z-index:1000;display:flex;align-items:center;justify-content:center;background:#00000073;-webkit-backdrop-filter:blur(4px);backdrop-filter:blur(4px);animation:fadeIn .15s ease-out}.regen-modal{background:var(--bg-primary);border:1px solid var(--border-color);border-radius:16px;padding:28px 32px;max-width:440px;width:calc(100% - 32px);box-shadow:0 20px 60px #0003;animation:fadeSlideIn .2s ease-out}.regen-modal-badge{display:inline-block;padding:2px 10px;border-radius:12px;font-size:.72rem;font-weight:600;text-transform:uppercase;letter-spacing:.05em;background:#ef44441a;color:#dc2626;border:1px solid rgba(239,68,68,.25);margin-bottom:10px}[data-theme=dark] .regen-modal-badge{background:#ef444426;color:#f87171;border-color:#ef44444d}.regen-modal-title{margin:0 0 8px;font-size:1.15rem;font-weight:600;color:var(--text-primary)}.regen-modal-desc{margin:0 0 20px;font-size:.88rem;color:var(--text-secondary);line-height:1.5}.regen-modal-meta{margin:0 0 24px;padding:14px 16px;background:var(--bg-secondary);border-radius:10px;border:1px solid var(--border-color)}.regen-meta-row{display:flex;justify-content:space-between;align-items:baseline;padding:5px 0}.regen-meta-row+.regen-meta-row{border-top:1px solid var(--border-color)}.regen-meta-row dt{font-size:.8rem;font-weight:500;color:var(--text-tertiary);text-transform:uppercase;letter-spacing:.03em;flex-shrink:0}.regen-meta-row dd{margin:0;font-size:.88rem;color:var(--text-primary);text-align:right;max-width:280px;word-break:break-word}.regen-modal-actions{display:flex;justify-content:flex-end;gap:10px}.regen-confirm-btn{background:var(--accent-color)!important;border-color:var(--accent-color)!important;color:#fff!important}.regen-confirm-btn:hover:not(:disabled){opacity:.88}.story-page{max-width:1080px;margin:0 auto;padding:80px 24px 48px;animation:fadeSlideIn .5s ease-out}.story-loading{display:flex;flex-direction:column;align-items:center;margin:80px auto 0;animation:fadeIn .3s ease-out}.story-loading-text{margin-top:12px;font-size:.9rem;color:var(--text-secondary);text-align:center}.error-banner{margin-top:16px;padding:14px 16px;background:color-mix(in srgb,var(--danger) 8%,var(--bg-primary));border:1px solid color-mix(in srgb,var(--danger) 25%,transparent);border-radius:var(--radius-sm)}.error-banner-body{display:flex;align-items:flex-start;gap:10px}.error-banner-icon{flex-shrink:0;width:22px;height:22px;display:flex;align-items:center;justify-content:center;background:var(--danger);color:#fff;border-radius:50%;font-size:.78rem;font-weight:700;line-height:1}.error-banner-text{margin:0;color:var(--text-primary);font-size:.9rem;line-height:1.45}.error-banner-actions{margin-top:10px;display:flex;justify-content:flex-end}.error-banner-retry{padding:5px 14px;border:1px solid var(--border-light);border-radius:var(--radius-sm);background:var(--bg-primary);color:var(--text-secondary);font-size:.82rem;cursor:pointer;transition:border-color var(--transition-fast),color var(--transition-fast)}.error-banner-retry:hover{border-color:var(--text-tertiary);color:var(--text-primary)}.btn-secondary{display:inline-flex;align-items:center;gap:6px;background:transparent;border:1px solid var(--primary);color:var(--primary);border-radius:var(--radius-sm);padding:8px 18px;font-size:.88rem;font-weight:500;cursor:pointer;transition:all var(--transition-fast)}.btn-secondary:hover{background:var(--primary-soft)}@keyframes fadeIn{0%{opacity:0}to{opacity:1}}@keyframes fadeSlideIn{0%{opacity:0;transform:translateY(16px)}to{opacity:1;transform:translateY(0)}}@media(max-width:768px){.hero-title{font-size:2rem}.home-center{max-width:100%}.floating-papers{position:relative;display:flex;overflow-x:auto;gap:12px;padding:72px 16px 0;-webkit-overflow-scrolling:touch;scrollbar-width:none;-webkit-mask-image:none;mask-image:none}.floating-papers::-webkit-scrollbar{display:none}.floating-card{position:relative!important;inset:auto!important;flex-shrink:0;width:260px;animation:none!important}.home-hero{flex-direction:column;min-height:auto;padding-top:0}.story-viewer{padding:20px 16px;border-radius:var(--radius-md)}.story-header h1{font-size:1.4rem}.title-audio-inline{width:100%}.book-arrow{width:36px;height:36px}.book-arrow-left{left:-4px}.book-arrow-right{right:-4px}.book-illustration,.book-illustration img{max-height:320px}.book-text-block{padding:20px 18px 18px}.book-text{font-size:.98rem;line-height:1.75}.drawer{width:100vw}.auth-bar{padding:0 16px}.login-card{padding:28px 22px}.story-container,.story-page{padding:68px 16px 32px}}@media(max-width:480px){.email-actions{flex-direction:column}.hero-title{font-size:1.7rem}}