:root{--bg: #f6f7f9;--card: #ffffff;--text: #111827;--muted: #6b7280;--line: #e5e7eb;--soft: #f3f4f6;--accent: #111827;--ok: #166534;--warn: #92400e;--danger: #991b1b;--radius: 18px}*{box-sizing:border-box}body{margin:0;background:var(--bg);color:var(--text);font-family:-apple-system,BlinkMacSystemFont,Segoe UI,PingFang SC,Microsoft YaHei,sans-serif}button,textarea{font:inherit}.app{max-width:640px;min-height:100vh;margin:0 auto;padding:max(20px,env(safe-area-inset-top)) 16px max(36px,env(safe-area-inset-bottom))}.topbar{display:flex;justify-content:space-between;align-items:center;margin-bottom:18px}.brand{font-size:18px;font-weight:750}.version{font-size:12px;color:var(--muted)}.progress-wrap{margin:10px 0 18px}.progress-meta{display:flex;justify-content:space-between;font-size:12px;color:var(--muted);margin-bottom:8px}.progress{height:8px;overflow:hidden;border-radius:999px;background:#e5e7eb}.progress>div{height:100%;background:var(--accent);transition:width .25s ease}.card{padding:22px;border:1px solid var(--line);border-radius:var(--radius);background:var(--card);box-shadow:0 6px 18px #1118270a}h1{margin:0 0 10px;font-size:28px;line-height:1.25}h2{margin:0 0 10px;font-size:22px;line-height:1.35}p{margin:10px 0;line-height:1.75}.muted{color:var(--muted)}.mini{font-size:13px;color:var(--muted)}.task{margin:18px 0;padding:16px;border-radius:14px;background:var(--soft);line-height:1.7}.task strong{display:block;margin-bottom:6px}.material{margin:16px 0;padding:18px;border-left:4px solid var(--accent);border-radius:10px;background:#fafafa;font-size:17px;line-height:1.9}.actions{display:grid;gap:10px;margin-top:18px}.inline-actions{display:grid;grid-template-columns:1fr 1fr;gap:10px}button{min-height:48px;padding:14px 16px;border:0;border-radius:14px;cursor:pointer;font-size:16px;font-weight:700}button:disabled{cursor:not-allowed;opacity:.45}.primary{color:#fff;background:var(--accent)}.secondary{color:var(--text);background:#eef0f3}.ghost{border:1px solid var(--line);color:var(--text);background:#fff}.danger{color:var(--danger);background:#fee2e2}.big-action{padding:17px;font-size:18px}.counter{display:flex;justify-content:center;align-items:center;gap:10px;margin:12px 0;color:var(--muted);font-size:14px}.pill{padding:6px 10px;border-radius:999px;background:var(--soft)}.timer{margin:18px 0 8px;text-align:center;font-size:42px;font-weight:800;font-variant-numeric:tabular-nums;letter-spacing:1px}.timer-label,.status{min-height:24px;text-align:center;color:var(--muted);font-size:14px}.status.error{color:var(--danger)}.status.ok{color:var(--ok)}audio{width:100%;margin-top:12px}textarea{width:100%;min-height:96px;padding:12px;resize:vertical;border:1px solid var(--line);border-radius:12px;background:#fff}.choice-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:8px;margin:10px 0 18px}.choice{padding:11px 8px;background:var(--soft);font-weight:650}.choice.active{color:#fff;background:var(--accent)}.success{padding:18px 4px;text-align:center}.success .check{font-size:48px}.history{margin-top:18px;padding-top:18px;border-top:1px solid var(--line)}.history-item{display:flex;justify-content:space-between;gap:12px;padding:10px 0;border-bottom:1px dashed var(--line);font-size:14px}.history-item span:last-child{overflow:hidden;text-overflow:ellipsis;white-space:nowrap}.update-banner{position:fixed;z-index:10;right:16px;bottom:max(16px,env(safe-area-inset-bottom));left:16px;max-width:608px;margin:0 auto;padding:14px;border:1px solid var(--line);border-radius:14px;background:#fff;box-shadow:0 12px 32px #1118272e}.update-banner p{margin:0 0 10px;line-height:1.5}.update-banner button{width:100%}@media(max-width:420px){.card{padding:18px}.choice-grid,.inline-actions{grid-template-columns:1fr}h1{font-size:26px}}