:root{--bg:#f5f6f8;--card:#fff;--text:#17202a;--muted:#6b7280;--line:#e5e7eb;--accent:#2563eb;--danger:#dc2626;--shadow:0 8px 24px rgba(0,0,0,.07)}*{box-sizing:border-box}body{margin:0;font-family:system-ui,-apple-system,Segoe UI,Roboto,Arial,sans-serif;background:var(--bg);color:var(--text)}.app{max-width:1120px;margin:0 auto;padding:18px}.topbar{display:flex;align-items:center;justify-content:space-between;gap:14px;margin-bottom:16px}.topbar h1{font-size:28px;margin:0}.topbar p{margin:2px 0 0;color:var(--muted)}.layout{display:grid;grid-template-columns:270px 1fr;gap:16px}.card{background:var(--card);border:1px solid var(--line);border-radius:18px;box-shadow:var(--shadow);padding:16px}.sidebar h2{font-size:16px;margin:0 0 12px}.lists{display:flex;flex-direction:column;gap:8px}.list-btn{width:100%;border:1px solid var(--line);background:#fff;padding:11px 12px;border-radius:12px;text-align:left;font-weight:650;cursor:pointer}.list-btn.active{background:#eaf1ff;border-color:#bcd0ff;color:#174eb6}.list-header{display:flex;gap:10px;align-items:center;margin-bottom:14px}.list-name{font-size:24px;font-weight:750;border:0;border-bottom:1px solid var(--line);padding:8px 0;width:100%;outline:none}.add-form{display:flex;gap:10px;margin-bottom:10px}.add-form input{flex:1;border:1px solid var(--line);border-radius:14px;padding:13px 14px;font-size:16px}button{border:0;border-radius:14px;padding:11px 15px;background:var(--accent);color:#fff;font-weight:750;cursor:pointer}button.secondary{background:#111827}button.ghost{background:transparent;color:var(--muted);border:1px solid var(--line)}button.danger{color:var(--danger)}.hint{color:var(--muted);font-size:13px;margin:4px 0 12px}.items{list-style:none;margin:0;padding:0;display:flex;flex-direction:column;gap:8px}.item{display:grid;grid-template-columns:auto 1fr auto;align-items:center;gap:10px;border:1px solid var(--line);border-radius:14px;background:#fff;padding:9px 10px}.item.checked{opacity:.58;background:#f3f4f6}.item.checked .item-text{text-decoration:line-through}.item-text{border:0;outline:none;background:transparent;width:100%;font-size:16px;padding:8px 0}.item input[type=checkbox]{width:22px;height:22px}.item-actions{display:flex;align-items:center;gap:6px}.mini{padding:7px 9px;border-radius:10px;background:#f3f4f6;color:#374151}.delete{color:var(--danger)}.drag{cursor:grab;color:#9ca3af;font-size:20px}.indent-1{margin-left:24px}.indent-2{margin-left:48px}.indent-3{margin-left:72px}.indent-4{margin-left:96px}.error-card code{display:inline-block;background:#f3f4f6;padding:8px;border-radius:8px}@media(max-width:760px){.app{padding:10px}.topbar h1{font-size:23px}.layout{grid-template-columns:1fr}.sidebar{order:1}.main-card{order:2}.lists{display:flex;flex-direction:row;overflow-x:auto;padding-bottom:3px}.list-btn{white-space:nowrap}.list-header{align-items:flex-start}.list-name{font-size:21px}.add-form{flex-direction:column}.add-form button{width:100%}.item{grid-template-columns:auto 1fr}.item-actions{grid-column:1/3;justify-content:flex-end}.indent-3,.indent-4{margin-left:54px}}