@import "https://fonts.googleapis.com/css2?family=Nunito:ital,wght@0,400;0,600;0,700;0,800;0,900;1,800&family=JetBrains+Mono:wght@400;500;600&display=swap";*,:before,:after{box-sizing:border-box;margin:0;padding:0}:root{--bg:#0f0e17;--bg-soft:#17161f;--bg-sunk:#1e1d28;--bg-card:#1a1926;--bg-raise:#222132;--ink:#f4f2ff;--ink-2:#c4c0e0;--ink-3:#8b87a8;--ink-4:#5a5670;--line:#ffffff14;--line-2:#ffffff0d;--coral:#ff6b6b;--coral-soft:#ff6b6b26;--watch-color:#4cc9f0;--watch-glow:#4cc9f02e;--read-color:#f9c74f;--read-glow:#f9c74f2e;--record-color:#ff6b6b;--record-glow:#ff6b6b2e;--practice-color:#06d6a0;--practice-glow:#06d6a02e;--test-color:#a78bfa;--test-glow:#a78bfa2e;--teal:#4cc9f0;--teal-soft:#4cc9f026;--lime:#06d6a0;--amber:#f9c74f;--violet:#a78bfa;--primary:#4cc9f0;--radius:12px;--radius-lg:18px;--radius-xl:24px;--sidebar-w:256px;--topbar-h:56px;--tabbar-h:64px}body{background:var(--bg);color:var(--ink);-webkit-font-smoothing:antialiased;font-family:Nunito,system-ui,sans-serif;font-size:15px;line-height:1.5}button{cursor:pointer;background:0 0;border:none;font-family:inherit}a{color:inherit;cursor:pointer;text-decoration:none}input,textarea{font-family:inherit}.shell{grid-template-columns:var(--sidebar-w) 1fr;grid-template-rows:var(--topbar-h) 1fr;height:100vh;display:grid;overflow:hidden}.shell.shell-full{grid-template-columns:1fr}.topbar{background:var(--bg-soft);border-bottom:1px solid var(--line);z-index:10;grid-column:1/-1;align-items:center;gap:16px;padding:0 20px;display:flex;position:relative}.topbar:after{content:"";background:linear-gradient(90deg, transparent 0%, var(--watch-color) 25%, var(--practice-color) 50%, var(--record-color) 75%, transparent 100%);opacity:.4;height:1px;position:absolute;bottom:0;left:0;right:0}.logo{color:var(--ink);letter-spacing:-.03em;flex-shrink:0;align-items:center;gap:9px;font-size:19px;font-weight:900;display:flex}.logo-mark{background:linear-gradient(135deg, var(--coral) 0%, #ff4757 100%);color:#fff;border-radius:10px;place-items:center;width:32px;height:32px;font-size:17px;font-weight:900;display:grid;box-shadow:0 4px 14px #ff6b6b66}.topbar-nav{gap:2px;margin-left:12px;display:flex}.topbar-nav a{color:var(--ink-3);border-radius:8px;padding:6px 12px;font-size:13.5px;font-weight:700;transition:background .15s,color .15s}.topbar-nav a:hover{background:var(--bg-sunk);color:var(--ink)}.topbar-nav a.active{color:var(--ink);background:var(--bg-sunk)}.topbar-right{align-items:center;gap:10px;margin-left:auto;display:flex}.xp-bar-wrap{background:var(--bg-sunk);border:1px solid var(--line);border-radius:999px;align-items:center;gap:8px;padding:4px 12px 4px 8px;display:flex}.xp-bar-label{color:var(--amber);letter-spacing:.03em;font-size:11px;font-weight:800}.xp-bar-track{background:#ffffff14;border-radius:999px;width:72px;height:5px;overflow:hidden}.xp-bar-fill{background:linear-gradient(90deg, var(--amber), #f4a636);border-radius:999px;height:100%;transition:width .5s cubic-bezier(.34,1.56,.64,1)}.streak{color:var(--amber);letter-spacing:-.01em;background:#f9c74f1f;border:1px solid #f9c74f33;border-radius:999px;align-items:center;gap:5px;padding:5px 11px;font-size:13px;font-weight:800;display:flex}.admin-toggle{color:var(--ink-3);border:1px solid var(--line);background:0 0;border-radius:8px;padding:6px 12px;font-size:12px;font-weight:700;transition:all .15s}.admin-toggle:hover,.admin-toggle.on{background:var(--bg-sunk);color:var(--ink);border-color:var(--line-2)}.avatar{background:linear-gradient(135deg, var(--violet), #7c3aed);color:#fff;border-radius:50%;place-items:center;width:32px;height:32px;font-size:13px;font-weight:900;display:grid;box-shadow:0 0 0 2px #a78bfa4d}.sidebar{border-right:1px solid var(--line);background:var(--bg-soft);flex-direction:column;display:flex;overflow:hidden}.sidebar-nav-group{border-bottom:1px solid var(--line);flex-direction:column;gap:4px;padding:14px;display:flex}.sidebar-nav-btn{color:var(--ink-3);text-align:left;cursor:pointer;background:0 0;border:none;border-radius:10px;align-items:center;gap:10px;width:100%;padding:10px 14px;font-size:13.5px;font-weight:800;transition:all .2s cubic-bezier(.34,1.56,.64,1);display:flex}.sidebar-nav-btn:hover{background:var(--bg-sunk);color:var(--ink)}.sidebar-nav-btn.active{color:var(--ink);background:var(--bg-raise)}.sidebar-nav-btn .nav-icon-box{background:var(--bg-sunk);width:26px;height:26px;color:var(--ink-3);border-radius:6px;flex-shrink:0;place-items:center;transition:all .2s;display:grid}.sidebar-nav-btn.active .nav-icon-box{color:#fff}.sidebar-nav-btn[data-mode=stories].active .nav-icon-box{background:var(--coral);box-shadow:0 0 10px #ff6b6b66}.sidebar-nav-btn[data-mode=roadmap].active .nav-icon-box{background:var(--practice-color);box-shadow:0 0 10px #06d6a066}.sidebar-nav-btn[data-mode=vocabs].active .nav-icon-box{background:var(--read-color);box-shadow:0 0 10px #f9c74f66}.sidebar-nav-btn[data-mode=stats].active .nav-icon-box{background:var(--violet);box-shadow:0 0 10px #a78bfa66}.sidebar-header{border-bottom:1px solid var(--line);padding:14px 16px}.sidebar-title{text-transform:uppercase;letter-spacing:.1em;color:var(--ink-4);margin-bottom:8px;font-size:10px;font-weight:800}.sidebar-story{justify-content:space-between;align-items:center;gap:6px;margin-bottom:3px;display:flex}.sidebar-story span:first-child{color:var(--ink);font-size:14px;font-weight:800}.level-pill{background:var(--bg-sunk);border:1px solid var(--line);color:var(--ink-3);border-radius:999px;padding:2px 8px;font-size:10px;font-weight:800}.sidebar-story-meta{color:var(--ink-3);margin-bottom:8px;font-size:12px;font-weight:600}.progress-track{background:var(--bg-sunk);border-radius:999px;height:5px;margin-bottom:10px;overflow:hidden}.progress-fill{background:linear-gradient(90deg, var(--practice-color), var(--teal));border-radius:999px;height:100%;transition:width .4s cubic-bezier(.34,1.56,.64,1)}.autonext{color:var(--ink-3);justify-content:space-between;align-items:center;font-size:12px;font-weight:700;display:flex}.toggle{background:var(--bg-sunk);cursor:pointer;border:1px solid var(--line);border-radius:999px;width:32px;height:18px;transition:background .2s;position:relative}.toggle:after{content:"";background:var(--ink-3);border-radius:50%;width:12px;height:12px;transition:transform .2s,background .2s;position:absolute;top:2px;left:2px}.toggle.on{background:var(--practice-color);border-color:var(--practice-color)}.toggle.on:after{background:#fff;transform:translate(14px)}.sidebar-scroll{flex:1;padding:10px 0;overflow-y:auto}.sidebar-scroll::-webkit-scrollbar{width:3px}.sidebar-scroll::-webkit-scrollbar-thumb{background:var(--line);border-radius:999px}.story-group-header{cursor:pointer;border-radius:10px;align-items:center;gap:9px;margin:1px 8px;padding:8px 14px;transition:background .12s;display:flex}.story-group-header:hover{background:var(--bg-sunk)}.story-group-header.current{background:var(--bg-raise)}.story-icon{background:var(--bg-sunk);border-radius:8px;flex-shrink:0;place-items:center;width:28px;height:28px;font-size:15px;display:grid}.story-name{color:var(--ink);flex:1;font-size:13px;font-weight:700}.story-count{color:var(--ink-4);font-size:11px;font-weight:700}.caret{color:var(--ink-4);transition:transform .2s}.caret.open{transform:rotate(90deg)}.lesson-list{padding:4px 0 8px 36px;position:relative}.lesson-list:before{content:"";background:linear-gradient(to bottom, var(--line), transparent);border-radius:999px;width:2px;position:absolute;top:0;bottom:0;left:22px}.lesson-item{cursor:pointer;border-radius:10px;align-items:center;gap:9px;margin:1px 8px 1px 0;padding:6px 12px 6px 0;transition:background .12s;display:flex;position:relative}.lesson-item:hover{background:var(--bg-sunk)}.lesson-item.active{background:var(--bg-raise)}.lesson-num{background:var(--bg-raise);border:2px solid var(--line);width:22px;height:22px;color:var(--ink-3);z-index:1;border-radius:50%;flex-shrink:0;place-items:center;font-size:10px;font-weight:900;transition:border-color .2s,background .2s;display:grid;position:relative}.lesson-item.active .lesson-num{background:var(--coral);border-color:var(--coral);color:#fff;box-shadow:0 0 0 3px #ff6b6b40}.lesson-title{color:var(--ink-2);flex:1;font-size:12.5px;font-weight:700}.lesson-item.active .lesson-title{color:var(--ink)}.lesson-dots{gap:3px;display:flex}.dot{background:var(--bg-raise);border:1px solid var(--line);border-radius:50%;width:6px;height:6px}.dot.done{background:var(--practice-color);border-color:var(--practice-color);box-shadow:0 0 4px #06d6a080}.lesson-progress-text{color:var(--ink-4);font-size:10px;font-weight:700}.main{background:var(--bg);flex-direction:column;display:flex;overflow:hidden}.tabbar{background:var(--bg-soft);border-bottom:1px solid var(--line);min-height:var(--tabbar-h);flex-shrink:0;align-items:center;gap:4px;padding:8px 16px;display:flex}.tab{color:var(--ink-4);cursor:pointer;white-space:nowrap;letter-spacing:.02em;text-transform:uppercase;background:0 0;border:1.5px solid #0000;border-radius:14px;flex-direction:column;justify-content:center;align-items:center;gap:3px;min-width:72px;padding:8px 18px;font-size:11px;font-weight:800;transition:all .2s cubic-bezier(.34,1.56,.64,1);display:flex;position:relative}.tab-icon{background:var(--bg-sunk);border-radius:10px;justify-content:center;align-items:center;width:32px;height:32px;transition:all .2s cubic-bezier(.34,1.56,.64,1);display:flex}.tab:hover{color:var(--ink-2);background:var(--bg-sunk)}.tab:hover .tab-icon{transform:translateY(-2px)}.tab:active{transform:scale(.94)}.tab[data-tab=watch].active{color:var(--watch-color);background:var(--watch-glow);border-color:#4cc9f04d}.tab[data-tab=watch].active .tab-icon{background:#4cc9f033;box-shadow:0 0 16px #4cc9f059}.tab[data-tab=vocab].active{color:var(--read-color);background:var(--read-glow);border-color:#f9c74f4d}.tab[data-tab=vocab].active .tab-icon{background:#f9c74f33;box-shadow:0 0 16px #f9c74f59}.tab[data-tab=read].active{color:var(--read-color);background:var(--read-glow);border-color:#f9c74f4d}.tab[data-tab=read].active .tab-icon{background:#f9c74f33;box-shadow:0 0 16px #f9c74f59}.tab[data-tab=record].active{color:var(--record-color);background:var(--record-glow);border-color:#ff6b6b4d}.tab[data-tab=record].active .tab-icon{background:#ff6b6b33;box-shadow:0 0 16px #ff6b6b59}.tab[data-tab=practice].active{color:var(--practice-color);background:var(--practice-glow);border-color:#06d6a04d}.tab[data-tab=practice].active .tab-icon{background:#06d6a033;box-shadow:0 0 16px #06d6a059}.tab[data-tab=test].active{color:var(--test-color);background:var(--test-glow);border-color:#a78bfa4d}.tab[data-tab=test].active .tab-icon{background:#a78bfa33;box-shadow:0 0 16px #a78bfa59}.count-pill{background:var(--coral);color:#fff;text-align:center;border-radius:999px;min-width:15px;padding:1px 5px;font-size:9px;font-weight:900;line-height:1.5;position:absolute;top:4px;right:4px;box-shadow:0 2px 6px #ff6b6b80}.tab-divider{background:var(--line);flex-shrink:0;width:1px;height:32px;margin:0 8px}.breadcrumb{color:var(--ink-3);background:var(--bg-soft);border-bottom:1px solid var(--line);flex-shrink:0;align-items:center;gap:6px;min-height:36px;padding:7px 20px;font-size:12px;font-weight:700;display:flex}.main-scroll{flex:1;overflow-y:auto}.watch-layout{flex-direction:column;gap:16px;padding:18px 24px 40px;display:flex}.player-wrap{aspect-ratio:16/9;border-radius:var(--radius-lg);background:#111;width:100%;max-width:85.3333vh;max-height:48vh;margin:0 auto;position:relative;overflow:hidden}@media (width<=800px){.player-wrap{max-width:100%}}.record-canvas-wrap{aspect-ratio:16/9;background:#000;border-radius:12px;width:100%;max-width:120.889vh;max-height:68vh;margin:0 auto;position:relative;overflow:hidden}@media (width<=800px){.record-canvas-wrap{max-width:100%}}.player-wrap iframe{border:0;width:100%;height:100%}.player-placeholder{color:#fff;text-align:center;flex-direction:column;justify-content:center;align-items:center;gap:10px;height:100%;display:flex}.player-placeholder .big{font-size:20px;font-weight:800}.player-placeholder .hint{color:#aaa;font-size:13px}.placeholder-add{background:var(--coral);color:#fff;border-radius:10px;margin-top:6px;padding:10px 20px;font-size:14px;font-weight:700}.timestamp-ribbon{background:var(--bg-card);border:1px solid var(--line-2);border-radius:var(--radius);overflow:hidden}.ribbon-header{border-bottom:1px solid var(--line-2);justify-content:space-between;align-items:center;padding:10px 14px;display:flex}.ribbon-title{color:var(--ink-2);align-items:center;gap:8px;font-size:13px;font-weight:700;display:flex}.badge{background:var(--coral-soft);color:var(--coral);border-radius:999px;padding:2px 8px;font-size:11px;font-weight:800}.ribbon-hint{color:var(--ink-3);font-size:12px}.ribbon-canvas{background:var(--bg-sunk);height:36px;position:relative;overflow:hidden}.ribbon-progress{background:var(--coral-soft);height:100%;transition:width .3s;position:absolute;top:0;left:0}.ribbon-wave{align-items:center;gap:1px;padding:4px 6px;display:flex;position:absolute;inset:0}.ribbon-wave span{background:var(--line);border-radius:1px;flex:1;min-width:2px}.ribbon-wave span.active{background:var(--coral)}.timestamp-chips{flex-wrap:wrap;gap:6px;padding:10px 12px;display:flex}.chip{background:var(--bg-sunk);width:30px;height:30px;color:var(--ink-2);border-radius:8px;place-items:center;font-size:12px;font-weight:800;transition:background .15s,color .15s;display:grid;position:relative}.chip:hover{background:var(--coral-soft);color:var(--coral)}.chip.active{background:var(--coral);color:#fff}.chip.done{background:var(--coral-soft);color:var(--coral)}.chip-preview{white-space:nowrap;background:var(--bg-raise);color:var(--ink);border:1px solid var(--line);pointer-events:none;z-index:10;border-radius:8px;padding:5px 10px;font-size:11.5px;font-weight:600;display:none;position:absolute;bottom:36px;left:50%;transform:translate(-50%)}.chip:hover .chip-preview{display:block}.video-sub-grid{grid-template-columns:1fr 1fr;gap:14px;display:grid}.mini-card{background:var(--bg-card);border:1px solid var(--line-2);border-radius:var(--radius);padding:14px 16px}.mini-card h4{text-transform:uppercase;letter-spacing:.06em;color:var(--ink-3);margin-bottom:10px;font-size:12px;font-weight:800}.word-list{flex-direction:column;margin-bottom:14px;display:flex}.word-entry{border-bottom:1px solid var(--line-2);padding:9px 0}.word-entry:last-child{border-bottom:none}.word-entry-top{align-items:baseline;gap:8px;margin-bottom:2px;display:flex}.word-entry-term{color:var(--ink);font-size:14px;font-weight:800}.word-entry-ipa{color:var(--ink-3);font-size:12px;font-style:italic}.word-entry-def{color:var(--ink-2);font-size:12px;line-height:1.4}.word-entry-vi{color:var(--primary);margin-top:2px;font-size:11px;font-weight:600}.word-progress{border-top:1px solid var(--line-2);flex-direction:column;gap:10px;padding-top:12px;display:flex}.word-progress-title{text-transform:uppercase;letter-spacing:.07em;color:var(--ink-4);margin-bottom:2px;font-size:10px;font-weight:800}.word-progress-step{align-items:flex-start;gap:10px;display:flex}.word-progress-step--dim{opacity:.45}.word-progress-check{background:var(--bg-soft);width:22px;height:22px;color:var(--ink-3);border:1.5px solid var(--line-2);border-radius:50%;flex-shrink:0;justify-content:center;align-items:center;font-size:11px;font-weight:800;display:flex}.word-progress-check--done{color:#fff;background:#4ade80;border-color:#4ade80}.word-progress-info{flex-direction:column;gap:1px;padding-top:2px;display:flex}.word-progress-label{color:var(--ink);font-size:12px;font-weight:700}.word-progress-action{color:var(--ink-3);font-size:11px}.word-progress-action--dim{font-style:italic}.lesson-stats{flex-direction:column;gap:8px;display:flex}.stat{color:var(--ink-2);justify-content:space-between;font-size:13px;display:flex}.stat b{color:var(--ink)}.bookread-wrapper{background:#0c0a08;flex-direction:column;width:100%;height:100%;display:flex;overflow:hidden}.bookread-stage{flex:1;min-height:clamp(280px,42vh,520px);position:relative;overflow:hidden}.bookread-scene-bg{background-position:50%;background-repeat:no-repeat;background-size:contain;animation:.4s cubic-bezier(.25,0,.2,1) bookread-scene-in;position:absolute;inset:0}@keyframes bookread-scene-in{0%{opacity:.7;transform:scale(.98)}to{opacity:1;transform:scale(1)}}.bookread-scene-empty{color:#ffffff26;background:linear-gradient(135deg,#1e1510,#0e0a14);justify-content:center;align-items:center;display:flex;position:absolute;inset:0}.bookread-text-panel{background:var(--bg-soft);border-top:1px solid var(--line);flex-shrink:0;align-items:center;gap:20px;min-height:100px;padding:18px 24px;display:flex;box-shadow:inset 0 1px #ffffff05}.bookread-audio-btn{border:2px solid var(--read-color);background:var(--read-glow);width:56px;height:56px;color:var(--read-color);cursor:pointer;border-radius:50%;flex-shrink:0;justify-content:center;align-items:center;transition:all .2s cubic-bezier(.34,1.56,.64,1);display:flex;box-shadow:0 4px 12px #f9c74f26}.bookread-audio-btn:hover{background:var(--read-color);color:#000;transform:scale(1.1)translateY(-1px);box-shadow:0 6px 20px #f9c74f4d}.bookread-audio-btn:active{transform:scale(.93)}.bookread-audio-btn.playing{background:var(--read-color);color:#000;animation:1.7s ease-in-out infinite bookread-pulse}@keyframes bookread-pulse{0%,to{box-shadow:0 0 #f9c74f66}55%{box-shadow:0 0 0 14px #f9c74f00}}.bookread-text-col{flex-direction:column;flex:1;gap:8px;min-width:0;display:flex}.bookread-sentence{color:var(--ink);border-radius:6px;margin:0;font-size:24px;font-weight:800;line-height:1.45;transition:all .2s}.bookread-sentence.playing{background:#f9c74f14;margin:0 -8px;padding:2px 8px}.bookread-word{cursor:pointer;border-bottom:2px solid #0000;border-radius:6px;margin:0 -2px;padding:2px 4px;transition:all .15s;display:inline-block}.bookread-word:hover{background:var(--read-glow);color:var(--read-color);border-bottom-color:var(--read-color)}.bookread-word.speaking{background:var(--read-color);color:#000;border-bottom-color:#0000;font-weight:900;animation:.2s cubic-bezier(.34,1.56,.64,1) bookread-word-pop;box-shadow:0 4px 12px #f9c74f4d}@keyframes bookread-word-pop{0%{transform:scale(1)}50%{transform:scale(1.14)}to{transform:scale(1)}}.bookread-ipa{color:var(--violet);letter-spacing:.02em;background:#a78bfa1f;border:1px solid #a78bfa2e;border-radius:999px;align-self:flex-start;margin:2px 0;padding:3px 10px;font-family:JetBrains Mono,monospace;font-size:13px;font-weight:700}.bookread-vi{color:var(--ink-2);background:var(--bg-sunk);border-left:3px solid var(--coral);border-radius:0 10px 10px 0;align-self:flex-start;margin-top:4px;padding:8px 14px;font-size:14.5px;font-weight:700}.bookread-no-transcript{color:var(--ink-4);margin:0;font-size:14px}.bookread-read-me-btn{background:var(--read-color);color:#000;cursor:pointer;white-space:nowrap;border:1.5px solid #0000;border-radius:999px;flex-shrink:0;align-items:center;gap:8px;padding:10px 22px;font-size:13px;font-weight:900;transition:all .2s cubic-bezier(.34,1.56,.64,1);display:flex;box-shadow:0 4px 14px 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