:root{--bg: #0f172a;--card: #1e293b;--text: #e2e8f0;--muted: #94a3b8;--accent: #38bdf8;--accent2: #22c55e;--danger: #f87171}*{box-sizing:border-box}body{margin:0;font-family:system-ui,-apple-system,Segoe UI,Roboto,sans-serif;background:var(--bg);color:var(--text);line-height:1.5}.container{max-width:720px;margin:0 auto;padding:24px 16px 64px}header h1{margin:0;font-size:28px;color:var(--accent)}.muted{color:var(--muted);font-size:14px}.error{background:#7f1d1d;color:#fee2e2;padding:10px 14px;border-radius:10px;font-size:14px}.card{background:var(--card);border-radius:14px;padding:18px;margin-top:18px;box-shadow:0 4px 20px #00000040}h2{margin-top:0;font-size:18px}h3{font-size:15px;color:var(--muted);margin-bottom:6px}.task-form{display:flex;flex-wrap:wrap;gap:8px;margin-bottom:12px}.task-form input{flex:1 1 140px;padding:10px;border-radius:8px;border:1px solid #334155;background:#0f172a;color:var(--text)}button{background:var(--accent);color:#06283d;border:none;padding:10px 16px;border-radius:8px;font-weight:600;cursor:pointer}button.link{background:transparent;color:var(--danger);padding:4px 8px;font-weight:500}.task-list{list-style:none;padding:0;margin:0}.task-list li{display:flex;align-items:center;justify-content:space-between;gap:10px;padding:8px 0;border-bottom:1px solid #334155}.task-list.done li{opacity:.6}.task-list label{display:flex;align-items:center;gap:10px;cursor:pointer;flex:1}.tag{background:#334155;color:var(--accent);font-style:normal;font-size:12px;padding:2px 8px;border-radius:999px;margin-left:6px}.streak-grid{display:flex;gap:12px;margin:12px 0}.stat{flex:1;background:#0f172a;border-radius:10px;padding:12px;text-align:center}.stat .num{display:block;font-size:26px;font-weight:700;color:var(--accent2)}.stat .label{font-size:12px;color:var(--muted)}