:root{--bg: #12151b;--card: #1b2029;--line: #2a313d;--text: #e6e9ef;--muted: #8b93a3;--accent: #60a5fa;--danger: #f87171;color-scheme:dark}*{box-sizing:border-box}html,body{margin:0;background:var(--bg);color:var(--text);font:16px/1.4 system-ui,-apple-system,Segoe UI,sans-serif}#app{min-height:100dvh;display:flex;flex-direction:column}main{flex:1;padding:16px 16px 80px;max-width:560px;width:100%;margin:0 auto}main.center{display:grid;place-items:center}h1{margin:0 0 8px;font-size:1.4rem}h2{margin:0;font-size:1rem;font-weight:600}p{margin:0}.topbar{display:flex;align-items:center;gap:12px;padding:12px 16px;padding-top:max(12px,env(safe-area-inset-top));border-bottom:1px solid var(--line)}.brand{font-weight:700;flex:1}.tabs{position:fixed;bottom:0;left:0;right:0;display:flex;background:var(--card);border-top:1px solid var(--line);padding-bottom:env(safe-area-inset-bottom)}.tabs button{flex:1;padding:14px;background:none;border:0;color:var(--muted);font-size:1rem}.tabs button.active{color:var(--accent);font-weight:600}.card{background:var(--card);border:1px solid var(--line);border-radius:12px;padding:14px}.card.accent{border-color:var(--accent)}.stack{display:flex;flex-direction:column;gap:12px}.row{display:flex;gap:8px;align-items:center}.row>*{flex:1;min-width:0}.row.between{justify-content:space-between}.row.between>*{flex:initial}label{display:flex;flex-direction:column;gap:4px;font-size:.9rem;color:var(--muted)}input,select{width:100%;padding:12px;font-size:1rem;background:var(--bg);color:var(--text);border:1px solid var(--line);border-radius:8px}button{padding:12px 16px;font-size:1rem;background:var(--card);color:var(--text);border:1px solid var(--line);border-radius:8px;cursor:pointer}button:disabled{opacity:.5}button.primary{background:var(--accent);border-color:var(--accent);color:#0b1220;font-weight:600}button.link{background:none;border:0;padding:4px 8px;color:var(--accent)}button.link.danger{color:var(--danger)}.segmented{display:flex;background:var(--bg);border:1px solid var(--line);border-radius:8px;padding:3px}.segmented button{flex:1;border:0;background:none;padding:10px;color:var(--muted);border-radius:6px}.segmented button.active{background:var(--card);color:var(--text);font-weight:600}.muted{color:var(--muted)}.small{font-size:.85rem}.big{font-size:1.15rem;font-weight:600}.error{color:var(--danger)}.timer{font-size:2.6rem;font-weight:700;font-variant-numeric:tabular-nums;text-align:center}.stat{text-align:center}.bar-row{display:grid;grid-template-columns:52px 1fr 64px;align-items:center;gap:8px}.bar{display:block;height:10px;min-width:2px;background:var(--accent);border-radius:5px}.grid-lines{display:grid;grid-template-columns:1fr 56px 56px 56px 44px;gap:6px;align-items:center}.grid-lines input{padding:10px 6px;text-align:center}.grid-lines.head span:not(:first-child),.grid-lines>span:last-child{text-align:center}button.danger-outline{color:var(--danger);border-color:var(--danger)}input[type=date]{min-height:46px}.chip{padding:6px 10px;border-radius:999px;font-size:.8rem;border:1px solid var(--line);background:var(--bg);color:var(--muted);white-space:nowrap}.chip.in_progress{color:var(--accent);border-color:var(--accent)}.chip.done{color:#4ade80;border-color:#4ade80}.chip.needs_review{color:#fbbf24;border-color:#fbbf24}.warn{color:#fbbf24}.progress{height:6px;background:var(--bg);border-radius:3px;overflow:hidden}.progress>span{display:block;height:100%;background:#4ade80}.subject-head{cursor:pointer}.tabs button{padding:14px 6px;font-size:.95rem}