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14px;text-decoration:none;display:flex}button.list-row{cursor:pointer}.group-title{letter-spacing:.5px;text-transform:uppercase;color:var(--muted);font-size:12px;font-weight:700}.bar{background:var(--line-soft);border-radius:4px;height:8px;display:block;overflow:hidden}.bar>span{background:var(--good);border-radius:4px;height:100%;display:block}.skeleton{background:linear-gradient(90deg, var(--line-soft), #fff, var(--line-soft));background-size:200% 100%;border-radius:12px;animation:1.4s linear infinite shimmer}@keyframes shimmer{to{background-position:-200% 0}}.sheet-backdrop{z-index:60;-webkit-backdrop-filter:blur(3px);backdrop-filter:blur(3px);background:#1b1d2480;justify-content:center;align-items:flex-end;animation:.18s ease-out sheet-fade;display:flex;position:fixed;inset:0}.sheet{background:var(--sheet);width:100%;max-width:480px;max-height:min(92dvh,760px);color:var(--ink);border-radius:26px 26px 0 0;outline:none;flex-direction:column;padding:10px 0 0;animation:.24s cubic-bezier(.2,.8,.2,1) sheet-up;display:flex;position:relative;box-shadow:0 -12px 40px #1b1d2438}.sheet-grip{background:var(--line);border-radius:2px;flex:none;align-self:center;width:38px;height:4px}.sheet-head{flex:none;justify-content:space-between;align-items:center;gap:12px;padding:14px 16px 10px 22px;display:flex}.sheet-head h2{letter-spacing:-.01em;margin:0;font-size:20px;line-height:1.25}.sheet-close{background:var(--line-soft);width:40px;min-width:0;height:40px;min-height:0;color:var(--ink);cursor:pointer;border:0;border-radius:50%;flex:none;justify-content:center;align-items:center;padding:0;display:inline-flex}.sheet-close:hover{background:var(--line)}.sheet-body{overscroll-behavior:contain;min-height:0;padding:4px 22px calc(24px + env(safe-area-inset-bottom));flex-direction:column;gap:14px;display:flex;overflow-y:auto}@keyframes sheet-up{0%{opacity:0;transform:translateY(40px)}}@keyframes sheet-fade{0%{opacity:0}}@media (width>=640px){.sheet-backdrop{align-items:center;padding:24px}.sheet{border-radius:24px;max-height:min(86dvh,720px);padding-top:6px;animation-name:sheet-pop;box-shadow:0 24px 64px #1b1d244d}.sheet-grip{display:none}.sheet-body{padding-bottom:24px}}@keyframes sheet-pop{0%{opacity:0;transform:scale(.96)translateY(8px)}}@media (prefers-reduced-motion:reduce){.sheet-backdrop,.sheet{animation:none}}.nav-fold{display:none}.app-nav{z-index:30;padding:8px 10px calc(10px + env(safe-area-inset-bottom));background:var(--sheet);border-top:1px solid var(--line);justify-content:center;display:flex;position:fixed;bottom:0;left:0;right:0}.nav-list{flex:1;justify-content:center;margin:0;padding:0;list-style:none;display:flex}.nav-list>li{flex:1;max-width:120px;display:flex;position:relative}.nav-brand,.nav-mini,.nav-foot{display:none}.nav-item{min-height:56px;color:var(--muted);flex-direction:column;flex:1;justify-content:center;align-items:center;gap:3px;font-size:12px;font-weight:500;text-decoration:none;display:flex;position:relative}.nav-pill{border-radius:15px;justify-content:center;align-items:center;width:52px;height:30px;display:flex}.nav-on{color:var(--ink);font-weight:700}.nav-on .nav-pill{background:var(--lang-tint)}.nav-bd{display:none}.nav-bd.nav-due{background:var(--lang);min-width:17px;height:17px;color:var(--lang-on);border-radius:9px;place-items:center;padding:0 4px;font-size:10px;font-weight:700;display:grid;position:absolute;top:2px;left:calc(50% + 6px)}.nav-ring{--p:0;--track:var(--well);background:conic-gradient(#f2b230 calc(var(--p) * 1turn), var(--track) 0);border-radius:50%;flex:none;place-items:center;display:grid;position:relative}.nav-ring>span{background:var(--paper);border-radius:50%;place-items:center;width:calc(100% - 10px);height:calc(100% - 10px);display:grid;overflow:hidden}.nav-avatar{background:var(--lang);width:36px;height:36px;color:var(--lang-on);border-radius:50%;flex:none;place-items:center;font-weight:700;text-decoration:none;display:grid}.hand-note{font-family:var(--font-hand);color:var(--pen);font-size:30px;font-weight:700;line-height:1}.pen-score{flex:none;justify-content:center;align-items:center;width:140px;height:120px;display:inline-flex;position:relative}.pen-score svg{width:100%;height:100%;position:absolute;inset:0}.pen-score path{fill:none;stroke:var(--pen);stroke-width:3.5px;stroke-linecap:round}.pen-score>span{letter-spacing:-2px;font-size:60px;font-weight:700;position:relative}.pen-score-small{width:96px;height:82px}.pen-score-small>span{font-size:40px}.struck{color:var(--muted);text-decoration:line-through;-webkit-text-decoration-color:var(--pen);text-decoration-color:var(--pen);text-decoration-thickness:2px}.fixed{color:var(--good);font-family:var(--font-text);font-size:22px;font-weight:600}.unclear{-webkit-text-decoration:underline wavy;text-decoration:underline wavy;-webkit-text-decoration-color:var(--pen);text-decoration-color:var(--pen);text-underline-offset:5px}.streak,.streak-chip{white-space:nowrap;align-items:center;gap:6px;font-size:15px;font-weight:700;display:inline-flex}.flame{color:#e8573f;display:inline-flex}.streak-box{flex-direction:column;align-items:flex-end;gap:2px;display:flex}.streak-chip{color:#6b4a00;background:#fcebc4;border-radius:14px;padding:6px 12px;font-size:14px}.listen-disc{flex:none;justify-content:center;align-items:center;display:inline-flex;position:relative}.listen-halo{background:var(--lang-tint);transform:scale(calc(.86 + var(--level,0) * .3));border-radius:50%;transition:transform 80ms linear;position:absolute;inset:0}.listen-core{background:var(--lang);width:60%;height:60%;color:var(--lang-on);border-radius:50%;justify-content:center;align-items:center;display:flex;position:relative;box-shadow:0 4px #0000002e}.listen-disc[data-paused=true] .listen-core{background:var(--sheet);color:var(--muted);box-shadow:none;border:2px dashed #cfc8b6}.listen-disc[data-paused=true] .listen-halo{background:var(--line-soft)}.speaker-disc{background:var(--lang-tint);border-radius:50%;flex:none;justify-content:center;align-items:center;display:inline-flex;position:relative}.speaker-core{border:2px solid var(--lang);background:var(--sheet);width:72%;height:72%;color:var(--ink);border-radius:50%;justify-content:center;align-items:center;display:flex}.lh-top{justify-content:space-between;align-items:center;gap:10px;display:flex}.lang-pill{border:1px solid var(--line);background:var(--sheet);min-height:40px;color:var(--ink);border-radius:20px;align-items:center;gap:8px;padding:0 12px 0 5px;font-size:14px;font-weight:600;text-decoration:none;display:inline-flex}.lang-pill b{background:var(--lang);width:30px;height:30px;color:var(--lang-on);border-radius:50%;justify-content:center;align-items:center;font-size:11px;display:flex}.unit-hero{background:var(--lang);color:var(--lang-on);border-radius:24px;flex-direction:column;gap:4px;padding:20px;display:flex;position:relative;overflow:hidden}.unit-art{position:absolute;top:4px;right:-6px}.unit-hero small{letter-spacing:.4px;text-transform:uppercase;opacity:.85;font-size:13px;font-weight:700;position:relative}.unit-hero h1{max-width:62%;font-family:var(--font-text);letter-spacing:-.6px;margin-top:4px;font-size:38px;font-weight:600;line-height:1.05;position:relative}.unit-hero>p{opacity:.9;max-width:60%;font-size:15px;position:relative}.unit-next{background:var(--sheet);color:var(--ink);border-radius:16px;flex-direction:column;gap:12px;margin-top:12px;padding:14px;display:flex;position:relative}.seg-progress{gap:4px;display:flex}.seg-progress span{background:var(--line-soft);border-radius:3px;flex:1;height:6px}.seg-progress span[data-done=true]{background:var(--ink)}.mini-tiles{grid-template-columns:repeat(2,minmax(0,1fr));gap:12px;display:grid}.mini-tile{border:1px solid var(--line);background:var(--sheet);color:inherit;border-radius:18px;flex-direction:column;gap:6px;padding:14px;font-size:15px;text-decoration:none;display:flex}.mini-tile small{color:var(--muted);font-size:13px;font-weight:600}.mini-tile b{font-size:24px}.mini-tile .tile-stack{flex-direction:column;gap:2px;display:flex}.mini-tile .tile-stack b{line-height:1.15}.mini-tile .mini-go{text-underline-offset:3px;margin-top:auto;font-size:14px;text-decoration:underline}.lesson-list{flex-direction:column;gap:6px;display:flex;position:relative}.lesson-row{min-height:46px;color:inherit;border-radius:14px;align-items:center;gap:12px;padding:4px 10px;text-decoration:none;display:flex;position:relative}.lesson-row[data-status=open]{background:var(--sheet);border:1.5px solid var(--ink)}.lesson-row[aria-disabled=true]{color:var(--muted)}.lesson-row:not(:last-child) .node:after{content:"";background:var(--line);width:2px;height:20px;margin-left:-1px;position:absolute;top:100%;left:50%}.node{background:var(--line-soft);width:32px;height:32px;color:var(--muted);border-radius:50%;flex:none;place-items:center;display:grid;position:relative}.node svg{width:16px;height:16px}.node[data-status=done]{background:var(--good);color:#fff}.node[data-status=open]{background:var(--ink);color:#fff}.lesson-title{flex-direction:column;flex:1;font-size:15px;display:flex}.lesson-title small,.lesson-status{color:var(--muted);font-size:13px}.lesson-status[data-status=done]{color:var(--good);font-weight:700}.lesson-go{letter-spacing:.4px;text-transform:uppercase;font-size:13px;font-weight:700}.talk-sub{margin-top:-8px}.talk-coach{border:1px solid var(--line);background:var(--sheet);border-radius:20px;align-items:center;gap:12px;padding:12px;display:flex}.talk-voice-art{background:var(--lang-tint);border-radius:16px;flex:none;justify-content:center;align-items:center;width:52px;height:52px;display:flex}.talk-coach>span:not(.talk-voice-art){flex-direction:column;flex:1;min-width:0;display:flex}.talk-coach strong{font-size:17px}.talk-coach small{color:var(--muted);font-size:13px}.talk-play{background:var(--lang-tint);width:44px;height:44px;color:var(--ink);cursor:pointer;border:0;border-radius:50%;flex:none;place-items:center;display:grid}.talk-change{text-underline-offset:3px;font-weight:700}.topics{flex-direction:column;gap:10px;margin:0;padding:0;list-style:none;display:flex}.topic{border:1px solid var(--line);background:var(--sheet);width:100%;color:var(--ink);text-align:left;cursor:pointer;border-radius:18px;align-items:center;gap:14px;padding:12px;text-decoration:none;display:flex}.topic:disabled{opacity:.5}.topic-art{background:#fcebc4;border-radius:14px;flex:none;justify-content:center;align-items:center;width:54px;height:54px;display:flex}.topic-art[data-i="1"]{background:var(--blue-tint)}.topic-art[data-i="2"]{background:var(--good-tint)}.topic-text{flex-direction:column;flex:1;min-width:0;display:flex}.topic-text strong{font-size:17px}.topic-text small{color:var(--ink-2);font-size:14px}.topic-dark{background:var(--ink);border-color:var(--ink);color:#fff}.topic-dark .topic-art{background:#33363f}.topic-dark .topic-text small{color:#cfd2da}.practice{z-index:40;max-width:480px;padding:14px 20px calc(20px + env(safe-area-inset-bottom));background:var(--paper);color:var(--ink);flex-direction:column;margin:0 auto;display:flex;position:fixed;inset:0;overflow-y:auto}.practice-gate{text-align:center;justify-content:center;align-items:center;gap:16px}.practice-gate h1{font-size:26px}.practice-gate .btn{max-width:320px}.practice-gate>.practice-icon{position:absolute;top:14px;left:16px}.practice-note{max-width:320px;color:var(--ink-2)}.practice-top{align-items:center;gap:12px;display:flex}.practice-icon{border:1px solid var(--line);background:var(--sheet);width:44px;height:44px;color:var(--ink);cursor:pointer;border-radius:50%;flex:none;place-items:center;padding:0;display:grid}.practice-segments{flex:1;gap:4px;display:flex}.practice-segments span{background:var(--line);border-radius:3px;flex:1;height:6px}.practice-segments span[data-done=true]{background:var(--good)}.practice-segments span[data-now=true]{background:var(--lang)}.practice-context{color:var(--muted);margin-top:22px;font-size:13px;font-weight:600}.practice-main{flex-direction:column;flex:1;min-height:0;display:flex}.practice-sheet{border:1px solid var(--line);background:var(--sheet);box-shadow:0 2px 0 var(--line);border-radius:18px;margin-top:10px;padding:10px 20px 14px;position:relative}.practice-sentence{font-family:var(--font-text);background:repeating-linear-gradient(#0000 0 46px,#eae4d5 46px 48px);font-size:clamp(24px,7.6vw,30px);font-weight:500;line-height:48px}.practice-gloss{min-height:22px;color:var(--ink-2);margin-top:8px;font-size:15px}.practice-tick{width:40px;height:40px;position:absolute;top:-14px;right:10px}.practice-tick path{fill:none;stroke:var(--pen);stroke-width:3.5px;stroke-linecap:round;stroke-linejoin:round}.practice-tick[data-show=false]{display:none}.pw-correct{color:var(--good)}.pw-unclear{color:var(--unsure);-webkit-text-decoration:underline wavy;text-decoration:underline wavy;-webkit-text-decoration-color:var(--pen);text-decoration-color:var(--pen);text-underline-offset:8px;text-decoration-thickness:2px}.pw-wrong{color:var(--pen);text-underline-offset:8px;text-decoration:underline}.pw-missing{color:var(--muted);text-decoration:line-through;-webkit-text-decoration-color:var(--pen);text-decoration-color:var(--pen)}.practice-stage{text-align:center;color:var(--ink-2);flex-direction:column;flex:1;justify-content:center;align-items:center;gap:8px;padding:16px 0;font-size:15px;display:flex}.practice-stage strong{color:var(--ink);font-size:22px}.practice-disc{margin-bottom:6px}.practice-wave{opacity:.3;align-items:center;gap:4px;height:34px;display:flex}.practice-wave[data-on=true]{opacity:1}.practice-wave i{background:var(--ink);border-radius:2px;width:4px;height:12px;animation:1s ease-in-out infinite wave}.practice-wave[data-live=true] i{background:var(--lang-deep);height:5px;transition:height 70ms linear;animation:none}@keyframes wave{50%{height:28px}}.practice-result{flex:1;align-items:center;gap:16px;padding:16px 0;display:flex}.practice-verdict{color:var(--ink-2);flex-direction:column;gap:4px;font-size:14px;display:flex}.practice-verdict strong{color:var(--ink);font-size:17px}.practice-chips{gap:6px;margin-top:4px;display:flex}.practice-chips b{border-radius:12px;padding:3px 10px;font-size:13px}.practice-chips b[data-c=good]{background:var(--good-tint);color:#145c33}.practice-chips b[data-c=lang]{background:var(--lang-tint);color:var(--lang-deep)}.practice-tries{color:var(--ink);align-items:center;gap:6px;margin-top:4px;font-weight:700;display:flex}.practice-tries i{background:var(--line);border-radius:50%;width:10px;height:10px}.practice-tries i[data-on=true]{background:var(--pen)}.practice-auto{border:1px solid var(--line);background:var(--sheet);border-radius:16px;justify-content:space-between;align-items:center;min-height:56px;padding:0 6px 0 18px;display:flex;position:relative;overflow:hidden}.practice-auto-fill{background:var(--lang-tint);width:0;animation:3s linear forwards sweep;position:absolute;inset:0 auto 0 0}@keyframes sweep{to{width:100%}}.practice-auto-text,.practice-auto button{position:relative}.practice-auto button{min-height:44px;color:var(--ink);text-underline-offset:3px;cursor:pointer;background:0 0;border:0;border-radius:12px;padding:0 14px;font-weight:700;text-decoration:underline}.practice-controls{border:1px solid var(--line);background:var(--sheet);border-radius:16px;display:flex;overflow:hidden}.practice-controls button{min-height:56px;color:var(--ink);cursor:pointer;background:0 0;border:0;flex:1;justify-content:center;align-items:center;gap:8px;font-weight:600;display:flex}.practice-controls button+button{border-left:1px solid var(--line)}.practice-link{min-height:48px;color:var(--ink);text-underline-offset:4px;cursor:pointer;background:0 0;border:0;margin-top:6px;font-weight:600;text-decoration:underline}.practice-hint{text-align:center;color:var(--muted);margin-top:12px;font-size:13px}.voice{max-width:480px;height:100dvh;padding:12px 16px calc(16px + env(safe-area-inset-bottom));background:var(--paper);flex-direction:column;gap:12px;margin:0 auto;display:flex}.voice-header{align-items:center;gap:10px;display:flex}.voice-header>div{flex-direction:column;flex:1;min-width:0;display:flex}.voice-header strong{font-size:17px}.voice-header small{color:var(--muted);font-size:13px}.voice-left{border:1px solid var(--line);background:var(--sheet);white-space:nowrap;border-radius:12px;padding:5px 10px;font-size:13px;font-weight:700}.transcript{flex-direction:column;flex:1;gap:12px;min-height:0;padding:4px 0;display:flex;overflow-y:auto}.bubble{max-width:85%;font-family:var(--font-text);padding:12px 14px;font-size:18px;line-height:1.45}.bubble-coach{border:1px solid var(--line);background:var(--sheet);border-radius:18px 18px 18px 6px;align-self:flex-start}.bubble-learner{background:var(--lang-tint);border-radius:18px 18px 6px;align-self:flex-end}.voice-bar{border:1px solid var(--line);background:var(--sheet);border-radius:22px;align-items:center;gap:10px;padding:8px 8px 8px 14px;display:flex}.voice-bar .btn{min-height:44px;padding:0 16px;font-size:15px}.voice-bar-text{color:var(--muted);flex:1;font-size:13px}.voice-orb{flex:none;display:flex}.voice-who{flex:1;align-items:center;gap:12px;min-width:0;display:flex}.coach-orb{border-radius:50%;flex:none;display:inline-flex;position:relative}.coach-orb:before{content:"";background:var(--lang-tint);border-radius:50%;transition:transform 80ms linear,background-color .2s;position:absolute;inset:-5px}.coach-orb .avatar{background:var(--paper);box-shadow:0 0 0 1px var(--line);position:relative}.voice-who[data-state=hearing] .coach-orb:before,.voice-who[data-state=speaking] .coach-orb:before{transform:scale(calc(1 + var(--level,0) * .2))}.voice-who[data-state=speaking] .coach-orb:before{background:#fcebc4}.voice-who[data-state=paused] .coach-orb:before,.voice-who[data-mic-off=true] .coach-orb:before{background:var(--line-soft)}.voice-who[data-state=paused] .avatar,.voice-who[data-mic-off=true] .avatar{filter:grayscale();opacity:.75}.voice-who .voice-bar-text{min-width:0}.coach-lvl{flex:none;align-items:center;gap:3px;height:26px;display:flex}.coach-lvl i{background:var(--lang);width:4px;height:100%;transform:scaleY(calc(.2 + var(--level,0) * var(--k,1)));border-radius:3px;transition:transform 80ms linear}.rp-head{align-items:center;gap:10px;display:flex}.rp-score{align-items:center;gap:12px;display:flex}.rp-score h1{font-size:22px}.score-bars{gap:8px}.score-part{grid-template-columns:70px 1fr 28px;align-items:center;gap:10px;font-size:14px;display:grid}.score-part 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