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rgba(0,0,0,.1)}.karaoke-sentence.near{opacity:.92;transform:scale(.99)}.karaoke-sentence.upcoming{opacity:.7;transform:scale(.97)}.karaoke-sentence.past{opacity:.65;transform:scale(.99)}.karaoke-sentence.past-far{opacity:.35;transform:scale(.97)}.karaoke-progress{display:none}.karaoke-progress-fill{height:100%;background:var(--accent);transition:width .2s linear}.settings-group{background:var(--surface);border:1px solid var(--border);border-radius:12px;padding:var(--space-6);margin-bottom:var(--space-6);transition:border-color var(--fast) var(--ease-out)}.settings-group:hover{border-color:var(--border-hover)}.settings-group-header{display:flex;align-items:center;gap:var(--space-3);margin-bottom:var(--space-4)}.settings-group-header .sg-icon{width:32px;height:32px;border-radius:8px;background:var(--accent-dim);color:var(--accent);display:flex;align-items:center;justify-content:center;flex-shrink:0}.settings-group-header h3{font-size:15px;font-weight:500;margin:0}.settings-group-header .sg-desc{font-size:12px;color:var(--text-3);margin-top:2px}.setting-row{display:flex;align-items:center;justify-content:space-between;padding:var(--space-3) 0;gap:var(--space-4)}.setting-row label{color:var(--text-2);font-size:14px;flex-shrink:0}.setting-row input[type=text],.setting-row select{background:var(--surface-2);border:1px solid var(--border);color:var(--text);padding:8px 12px;border-radius:8px;font:13px/1 Geist,sans-serif;width:240px}.setting-row input[type=range]{-webkit-appearance:none;-moz-appearance:none;appearance:none;width:200px;height:2px;background:var(--border);border-radius:1px;outline:none}.setting-row input[type=range]::-webkit-slider-thumb{-webkit-appearance:none;width:8px;height:8px;background:var(--white);border-radius:50%;cursor:pointer}.voice-preview-btn{background:none;border:1px solid var(--border);color:var(--text-2);width:28px;height:28px;border-radius:6px;cursor:pointer;display:inline-flex;align-items:center;justify-content:center;font-size:11px;transition:all var(--fast);margin-left:var(--space-2);flex-shrink:0}.voice-preview-btn:hover{border-color:var(--accent);color:var(--accent);background:var(--accent-dim)}.voice-preview-btn.previewing{border-color:var(--accent);color:var(--accent);animation:spin .8s linear infinite}.mini-player{position:fixed;bottom:0;left:0;right:0;height:64px;background:var(--mini-bg);backdrop-filter:blur(20px);-webkit-backdrop-filter:blur(20px);border-top:1px solid var(--border);display:none;align-items:center;padding:0 var(--space-8);gap:var(--space-4);z-index:150;box-shadow:0 -4px 12px #0000000d}.mini-player.visible{display:flex}.mini-player .mini-cover{width:40px;height:40px;border-radius:6px;object-fit:cover;background:var(--surface-2);border:1px solid var(--border)}.mini-player .mini-info{flex:1;min-width:0}.mini-player .mini-info .t{font-size:13px;font-weight:500;white-space:nowrap;overflow:hidden;text-overflow:ellipsis;color:var(--text)}.mini-player .mini-info .s{font-size:11px;color:var(--text-2);white-space:nowrap;overflow:hidden;text-overflow:ellipsis}.mini-player .mini-controls{display:flex;align-items:center;gap:var(--space-2)}.mini-player .mini-progress{position:absolute;top:-1px;left:0;right:0;height:2px;background:var(--surface-3);transition:height var(--fast)}.mini-player:hover .mini-progress{height:4px;top:-2px}.mini-player .mini-progress-fill{height:100%;background:var(--accent);transition:width .2s linear}.modal-overlay{position:fixed;top:0;right:0;bottom:0;left:0;background:#000c;backdrop-filter:blur(8px);-webkit-backdrop-filter:blur(8px);display:none;align-items:center;justify-content:center;z-index:9999;opacity:0;transition:opacity var(--fast)}.modal-overlay.visible{display:flex!important;opacity:1}.modal{background:var(--surface);border:1px solid var(--border);border-radius:12px;padding:var(--space-6);width:90%;max-width:320px;box-shadow:0 12px 40px #0006;transform:scale(.95) translateY(10px);transition:all var(--fast);opacity:0}.modal-overlay.visible .modal{transform:scale(1) translateY(0);opacity:1}.modal h3{font-family:"Instrument Serif",serif;font-size:24px;margin-bottom:var(--space-2);font-weight:400}.chapter-modal{max-width:640px;max-height:85vh;display:flex;flex-direction:column;padding:0;width:95%}.chapter-modal-header{padding:var(--space-6);border-bottom:1px solid var(--border);flex-shrink:0;display:flex;justify-content:space-between;align-items:center}.chapter-modal-header h3{margin:0;font-size:28px}.chapter-modal-close{background:transparent;border:none;color:var(--text-2);cursor:pointer;padding:var(--space-2);margin:-8px}.chapter-modal-close:hover{color:var(--text)}.chapter-modal-content{flex:1;min-height:0;overflow-y:auto!important;padding:var(--space-4);overscroll-behavior:contain;-webkit-overflow-scrolling:touch}.chapter-modal-content .chapter-list{display:flex;flex-direction:column;gap:1px;background:var(--border);border:1px solid var(--border);border-radius:8px}.chapter-modal-content .chapter-item{background:var(--surface)}.chapter-modal-content .chapter-item:hover{background:var(--surface-2)}.chapter-modal-content .chapter-item{display:flex;align-items:center;justify-content:space-between;padding:var(--space-3) var(--space-4);border-radius:0;cursor:pointer;font-size:14px;color:var(--text-2);transition:all var(--fast)}.chapter-modal-content .chapter-item:hover,.chapter-modal-content .chapter-item.active{color:var(--text)}.chapter-modal-content .chapter-item.active:before{content:"";width:4px;height:4px;background:var(--accent);border-radius:50%;margin-right:var(--space-3)}.chapter-modal-content .chapter-item .ch-time{font-family:Geist Mono,monospace;font-size:11px;color:var(--text-3)}.chapter-modal-content .chapter-item.front-matter{opacity:.4;font-style:italic}.timer-options{display:flex;flex-direction:column;gap:var(--space-2)}.timer-opt{padding:var(--space-3) var(--space-4);border-radius:8px;background:transparent;border:1px solid var(--border);color:var(--text-2);font:14px/1 Geist,sans-serif;cursor:pointer;text-align:left;transition:all var(--fast)}.timer-opt:hover{border-color:var(--border-hover);color:var(--text)}.timer-opt.active{border-color:var(--accent);color:var(--text)}.skip-link{position:absolute;top:-40px;left:0;background:var(--accent);color:#000;padding:8px 16px;z-index:1000;transition:top var(--fast);text-decoration:none;font-size:14px}.skip-link:focus{top:0}.toast-container{position:fixed;top:80px;right:16px;z-index:400;display:flex;flex-direction:column;gap:8px;pointer-events:none}.toast{background:var(--surface);border:1px solid var(--border);border-radius:8px;padding:12px 20px;font-size:13px;color:var(--text);opacity:0;transform:translate(20px);transition:all var(--base) var(--ease-out);pointer-events:auto;max-width:340px}.toast.visible{opacity:1;transform:translate(0)}.toast-error{border-color:#ff6b6b40;background:#ff6b6b1a}.toast-warning{border-color:#f5a62340;background:#f5a6231a}.toast-success{border-color:#4ade8040;background:#4ade801a}.toast-info{border-color:#60a5fa40;background:#60a5fa1a}.audio-loading .play-btn{position:relative}.audio-loading .play-btn:after{content:"";position:absolute;top:0;right:0;bottom:0;left:0;border:2px solid transparent;border-top-color:var(--accent);border-radius:50%;animation:spin .8s linear infinite}@keyframes spin{to{transform:rotate(360deg)}}.skeleton .book-cover-wrap{background:var(--surface-2);overflow:hidden;position:relative}.skeleton .book-cover-wrap:after,.skeleton-line:after{content:"";position:absolute;top:0;right:0;bottom:0;left:0;background:linear-gradient(90deg,transparent,rgba(255,255,255,.06),transparent);animation:shimmer 1.8s ease-in-out infinite}.skeleton-line{height:12px;background:var(--surface-2);border-radius:4px;margin-top:8px;position:relative;overflow:hidden}.skeleton-line.short{width:60%}@keyframes shimmer{0%{transform:translate(-100%)}to{transform:translate(100%)}}.mobile-nav{display:none;position:fixed;bottom:0;left:0;right:0;height:60px;background:#111111f2;backdrop-filter:blur(20px);-webkit-backdrop-filter:blur(20px);border-top:1px solid var(--border);z-index:200;justify-content:space-around;align-items:center;padding:0 var(--space-2)}.mob-tab{display:flex;flex-direction:column;align-items:center;gap:2px;background:none;border:none;color:var(--text-3);font-size:10px;cursor:pointer;padding:8px 12px;transition:color var(--fast)}.mob-tab.active{color:var(--accent)}.mob-icon{font-size:20px}.mob-label{font-family:Geist,sans-serif}.sort-bar{display:flex;align-items:center;gap:var(--space-2)}.sort-bar select{background:var(--surface-2);border:1px solid var(--border);color:var(--text);padding:6px 10px;border-radius:6px;font:12px/1 Geist,sans-serif;cursor:pointer;-webkit-appearance:auto;-moz-appearance:auto;appearance:auto}.theme-toggle{display:flex;gap:var(--space-2);align-items:center}.theme-btn{padding:8px 16px;border-radius:8px;border:1px solid var(--border);background:transparent;color:var(--text-2);font:13px/1 Geist,sans-serif;cursor:pointer;transition:all var(--fast)}.theme-btn.active{border-color:var(--accent);color:var(--text);background:var(--accent-dim)}.reader-toolbar{display:flex;flex-wrap:wrap;gap:var(--space-3);align-items:center;padding:var(--space-3) var(--space-4);background:var(--surface);border:1px solid var(--border);border-radius:10px;margin-bottom:var(--space-3)}.reader-toolbar .tb-group{display:flex;align-items:center;gap:var(--space-2)}.reader-toolbar label{font-size:11px;color:var(--text-3);font-family:Geist Mono,monospace;letter-spacing:.05em;text-transform:uppercase;white-space:nowrap}.reader-toolbar select,.reader-toolbar input[type=range]{background:var(--surface-2);border:1px solid var(--border);color:var(--text);padding:4px 8px;border-radius:6px;font:12px/1 Geist,sans-serif;cursor:pointer}.reader-btn{width:32px;height:32px;border-radius:6px;border:1px solid var(--border);background:transparent;color:var(--text);cursor:pointer;transition:all var(--fast);display:flex;align-items:center;justify-content:center;font-size:13px}.reader-btn.active{border-color:var(--accent);box-shadow:0 0 0 1px var(--accent)}.onboarding-overlay{position:fixed;top:0;right:0;bottom:0;left:0;z-index:10000;background:#000000d9;backdrop-filter:blur(24px);-webkit-backdrop-filter:blur(24px);display:flex;align-items:center;justify-content:center;opacity:0;animation:onboardFadeIn var(--slow) var(--ease-out) forwards}@keyframes onboardFadeIn{to{opacity:1}}.onboarding-card{background:var(--surface);border:1px solid var(--border);border-radius:20px;padding:var(--space-12) var(--space-8);max-width:540px;width:90%;box-shadow:0 24px 80px #00000080;position:relative;overflow:hidden}.onboarding-card:before{content:"";position:absolute;top:-60%;left:-40%;width:180%;height:180%;background:radial-gradient(circle,var(--accent-dim) 0%,transparent 60%);pointer-events:none;opacity:.6}.onboarding-card h2{font-family:"Instrument 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Mono,monospace;font-size:12px;font-weight:600;flex-shrink:0}.onboard-step-content{flex:1}.onboard-step-content .step-title{font-weight:500;font-size:14px;margin-bottom:2px}.onboard-step-content .step-desc{font-size:13px;color:var(--text-2)}.onboard-step-content code{font-family:Geist Mono,monospace;font-size:12px;background:var(--bg);border:1px solid var(--border);padding:2px 6px;border-radius:4px;color:var(--accent)}.onboarding-card .onboard-actions{display:flex;gap:var(--space-3);justify-content:center;margin-top:var(--space-8);position:relative}.onboarding-card .onboard-dismiss{background:none;border:none;color:var(--text-3);font-size:12px;cursor:pointer;position:absolute;top:var(--space-4);right:var(--space-4);padding:var(--space-2);z-index:1}.onboarding-card .onboard-dismiss:hover{color:var(--text-2)}@media(max-width:768px){header{padding:0 var(--space-4);height:56px}header h1{font-size:18px}header nav{display:none}main{padding:var(--space-4);padding-bottom:calc(140px + env(safe-area-inset-bottom,0px))}.mobile-nav{display:flex;padding-bottom:env(safe-area-inset-bottom,0px)}#library-view>div:nth-child(2){flex-direction:column!important;align-items:stretch!important;gap:var(--space-3)}#library-view>div:nth-child(2)>div:first-child{flex-direction:column;gap:var(--space-3)}.library-search,.sort-bar,.sort-bar select{width:100%}.book-grid{grid-template-columns:repeat(auto-fill,minmax(130px,1fr));gap:var(--space-4)}.book-card .delete-btn{opacity:.7}.hero-card{flex-direction:column}.hero-cover{width:100%;height:200px}.hero-info h2{font-size:28px}.empty-state{padding:var(--space-8) 0}.empty-state h2{font-size:28px}#player-view.active{height:calc(100vh - 56px)}#player-view.active{height:calc(100dvh - 56px)}.player-layout{flex-direction:column;padding:var(--space-4);gap:var(--space-6);padding-bottom:calc(80px + env(safe-area-inset-bottom,0px));overflow-y:auto;align-items:stretch}.player-cover-column{flex-direction:row;gap:var(--space-4);width:100%;align-items:flex-start}.player-cover,.player-cover-gradient{width:140px;height:210px;border-radius:10px;flex-shrink:0}.cover-actions{flex-direction:column;gap:var(--space-2);flex:1;justify-content:flex-start}.player-controls{max-width:100%}.player-controls .title{font-size:28px}.player-controls .author{font-size:13px}.transport{gap:var(--space-2)}.transport .transport-btn{width:48px;height:48px}.transport .play-btn{width:56px;height:56px;margin:0 var(--space-2)}.speed-pills{overflow-x:auto;-webkit-overflow-scrolling:touch;justify-content:flex-start;padding-bottom:var(--space-2);scrollbar-width:none;-ms-overflow-style:none;flex-wrap:nowrap}.speed-pills::-webkit-scrollbar{display:none}.speed-pill{flex-shrink:0;padding:8px 14px}.player-secondary{flex-wrap:wrap;gap:var(--space-3);padding:var(--space-3)}.secondary-divider{display:none}.secondary-group{flex:1 1 100%;gap:var(--space-3)}.volume-slider{width:100%;flex:1}.voice-select-compact{max-width:100%;width:100%}.pitch-slider-compact{width:100%;flex:1;min-width:0}#karaoke-view.active{height:calc(100vh - 56px)}#karaoke-view.active{height:calc(100dvh - 56px)}.reader-toolbar{gap:var(--space-2);padding:var(--space-2) var(--space-3)}.reader-toolbar .tb-group{flex:1 1 auto;min-width:0}.reader-toolbar label{font-size:10px}.reader-toolbar select{padding:4px 6px;font-size:11px;min-width:0;max-width:100%}.reader-toolbar .tb-group:nth-child(3){display:none}.karaoke-text{max-width:100%!important;padding:30vh 0 50vh}.settings-group{padding:var(--space-4)}.setting-row{flex-direction:column;align-items:stretch;gap:var(--space-2)}.setting-row label{font-size:13px}.setting-row input[type=text],.setting-row select,.setting-row input[type=range],.theme-toggle{width:100%}.theme-btn{flex:1;text-align:center;padding:10px 12px}.shortcut-row{font-size:12px}.drop-zone{padding:40px var(--space-4);min-height:200px}.drop-zone .drop-icon{width:48px;height:48px}.drop-zone h2{font-size:24px}.drop-zone p{font-size:13px}.parse-line .lbl{min-width:80px;font-size:11px}.mini-player{padding:0 var(--space-4)}.mini-player.visible{bottom:calc(var(--mobile-nav-height) + env(safe-area-inset-bottom,0px))}.modal{width:95%;max-width:none;padding:var(--space-4)}.modal h3{font-size:20px}.chapter-modal{width:95%;max-height:85vh}.chapter-modal-header{padding:var(--space-4)}.chapter-modal-header h3{font-size:22px}.onboarding-card{padding:var(--space-6) var(--space-4);max-width:100%;width:95%;border-radius:16px}.onboarding-card h2{font-size:28px}.onboarding-card .onboard-subtitle{font-size:13px;margin-bottom:var(--space-6)}.onboarding-card .onboard-actions{flex-direction:column;gap:var(--space-2)}.onboarding-card .onboard-actions .btn-primary,.onboarding-card .onboard-actions .btn-ghost{width:100%}.toast-container{top:auto;bottom:calc(130px + env(safe-area-inset-bottom,0px));right:var(--space-4);left:var(--space-4)}.toast,.view{max-width:100%}}@media(max-width:768px){html[data-theme=light] .mobile-nav{background:#ffffffeb}html[data-theme=soft] .mobile-nav{background:#faf6f0f2}html[data-theme=light] .mobile-nav .mob-tab,html[data-theme=soft] .mobile-nav .mob-tab{color:var(--text-3)}html[data-theme=light] .mobile-nav .mob-tab.active,html[data-theme=soft] .mobile-nav .mob-tab.active{color:var(--accent)}}@media(min-width:769px)and (max-width:1024px){main{padding:var(--space-6)}.book-grid{grid-template-columns:repeat(auto-fill,minmax(140px,1fr))}.player-cover,.player-cover-gradient{width:220px;height:330px}.player-controls .title{font-size:36px}.player-layout{gap:var(--space-8)}.setting-row input[type=text],.setting-row select{width:200px}.view{max-width:960px}}@media(max-width:480px){header{padding:0 var(--space-3)}.book-grid{grid-template-columns:repeat(2,1fr);gap:var(--space-3)}.book-title{font-size:13px}.book-author{font-size:11px}.player-cover,.player-cover-gradient{width:120px;height:180px}.player-controls .title{font-size:24px}.speed-pill{padding:6px 10px;font-size:11px}.hero-info h2{font-size:22px}.transport .play-btn{width:52px;height:52px}.onboarding-card h2{font-size:24px}.timer-opt{padding:var(--space-3);font-size:13px}}