:root{--bg: #0f1115;--panel: #171a21;--line: #262b36;--text: #e7e9ee;--muted: #8b93a3;--accent: #e8623d;--live: #3ddc84;font-family:system-ui,-apple-system,Segoe UI,PingFang SC,sans-serif}*{box-sizing:border-box}body{margin:0;background:var(--bg);color:var(--text)}.center{min-height:100vh;display:grid;place-items:center}.card{background:var(--panel);border:1px solid var(--line);border-radius:14px;padding:32px;width:min(360px,90vw);display:flex;flex-direction:column;gap:12px}h1{margin:0;font-size:28px}.muted{color:var(--muted)}input{background:#0c0e12;border:1px solid var(--line);color:var(--text);border-radius:8px;padding:10px 12px;font-size:15px}button{background:var(--accent);color:#fff;border:none;border-radius:8px;padding:10px 16px;font-size:15px;cursor:pointer}button:disabled{opacity:.5;cursor:default}button.ghost{background:transparent;color:var(--muted)}button.stop{background:#33383f}.app{max-width:960px;margin:0 auto;padding:24px 20px;display:flex;flex-direction:column;gap:20px}.workspace{display:grid;grid-template-columns:1fr 260px;gap:20px;align-items:start}@media(max-width:720px){.workspace{grid-template-columns:1fr}}.controls{flex-wrap:wrap;align-items:center}.seg{display:flex;align-items:center;gap:6px}.seg-label{color:var(--muted);font-size:13px;margin-right:2px}.seg button{background:var(--panel);border:1px solid var(--line);color:var(--muted);padding:6px 10px;font-size:13px;border-radius:6px}.seg button.on{background:var(--accent);color:#fff;border-color:var(--accent)}.seg-toggle.on{color:var(--accent);border:1px solid var(--accent)}.talk{background:#33383f;-webkit-user-select:none;user-select:none;touch-action:none}.talk:active{background:var(--accent)}.practice{background:var(--panel);border:1px solid var(--line);border-radius:12px;padding:14px;position:sticky;top:16px;display:flex;flex-direction:column;gap:8px}.practice-head{display:flex;justify-content:space-between;color:var(--muted);font-size:12px;text-transform:uppercase;letter-spacing:.05em;margin-top:4px}.practice-progress{color:var(--live)}.small{font-size:12px}.word-list,.frame-list{list-style:none;margin:0;padding:0;display:flex;flex-direction:column;gap:6px}.word-list li{display:grid;grid-template-columns:14px auto 1fr;gap:4px 6px;align-items:baseline;font-size:14px}.word-list li .check{color:var(--live)}.word-list li.used .hz{color:var(--muted);text-decoration:line-through}.word-list li .hz{font-size:16px}.word-list li .py{color:var(--accent);font-size:12px}.word-list li .mn{grid-column:2 / 4;color:var(--muted);font-size:12px}.word-list li .leech{grid-column:2 / 4;justify-self:start;font-size:10px;color:#f0b33d;border:1px solid #f0b33d55;border-radius:4px;padding:0 4px}.frame-list li{display:flex;flex-direction:column;font-size:13px}.frame-list li .fp{color:var(--text)}.frame-list li .ff{color:var(--accent);font-size:12px}.history-section{display:flex;flex-direction:column;gap:8px}.history{list-style:none;margin:0;padding:0;display:flex;flex-direction:column;gap:6px}.history li{display:flex;align-items:stretch;gap:6px}.history-open{flex:1;display:grid;grid-template-columns:auto 1fr auto;gap:12px;align-items:center;text-align:left;background:var(--panel);border:1px solid var(--line);color:var(--text);border-radius:8px;padding:10px 12px;font-size:14px}.history-open:hover{border-color:var(--accent)}.history-open .h-meta{color:var(--muted);font-size:13px}.history-open .h-cost{color:var(--live);font-variant-numeric:tabular-nums}.history-del{background:transparent;border:1px solid var(--line);color:var(--muted);border-radius:8px;padding:0 12px;font-size:18px}.history-del:hover{color:#ff5c5c;border-color:#ff5c5c55}.app header{display:flex;align-items:center;gap:16px}.app header h1{font-size:22px}.status{display:flex;align-items:center;gap:8px;color:var(--muted);font-size:14px;margin-left:auto}.timer{color:var(--text);font-variant-numeric:tabular-nums}.cost{color:var(--live);font-variant-numeric:tabular-nums;border:1px solid var(--line);border-radius:6px;padding:1px 6px}.dot{width:9px;height:9px;border-radius:50%;background:var(--muted)}.dot.live{background:var(--live);box-shadow:0 0 0 3px #3ddc8433}.dot.error{background:#ff5c5c}.dot.minting,.dot.connecting{background:#f0b33d}.controls{display:flex;gap:12px}.transcript{display:flex;flex-direction:column;gap:10px;min-height:200px}.turn{display:flex;gap:10px;padding:10px 12px;border-radius:10px;background:var(--panel);border:1px solid var(--line);line-height:1.5}.turn.user{background:transparent}.turn .who{font-size:12px;color:var(--muted);min-width:28px;padding-top:2px}.turn-body{display:flex;flex-direction:column;gap:6px}.turn.assistant .text{font-size:20px;line-height:1.6}.token{background:transparent;border:none;padding:0 1px;margin:0;color:inherit;font:inherit;cursor:pointer;border-radius:4px;border-bottom:1px dotted transparent}.token:hover{background:#e8623d29;border-bottom-color:var(--accent)}.turn-actions{font-size:13px}button.link{background:none;border:none;color:var(--muted);padding:0;cursor:pointer;font-size:13px;text-decoration:underline}.sentence-tx{color:var(--muted);font-size:14px;font-style:italic}.popover-scrim{position:fixed;top:0;right:0;bottom:0;left:0;z-index:10}.popover{position:fixed;z-index:11;background:#0c0e12;border:1px solid var(--line);border-radius:10px;padding:10px 14px;min-width:120px;max-width:260px;box-shadow:0 8px 30px #00000080;text-align:center}.popover-hanzi{font-size:22px}.popover-pinyin{color:var(--accent);font-size:15px;margin-top:2px}.popover-en{color:var(--text);font-size:14px;margin-top:4px}.popover-loading{color:var(--muted)}