:root {
  --bg: #f6f7f9;
  --panel: #ffffff;
  --text: #16181d;
  --muted: #626b7a;
  --line: #dfe3ea;
  --accent: #2563eb;
  --danger: #b42318;
}

@media (prefers-color-scheme: dark) {
  :root {
    --bg: #0f1216;
    --panel: #171b21;
    --text: #eef1f6;
    --muted: #9aa4b2;
    --line: #2a3038;
    --accent: #6ea8fe;
    --danger: #ff8a80;
  }
}

* { box-sizing: border-box; }

html, body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font: 16px/1.4 system-ui, -apple-system, "Segoe UI", Roboto, sans-serif;
  -webkit-text-size-adjust: 100%;
}

.bar {
  position: sticky;
  top: 0;
  z-index: 2;
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  justify-content: space-between;
  gap: 0.25rem 1rem;
  padding: 0.75rem 1rem;
  background: var(--panel);
  border-bottom: 1px solid var(--line);
}

.bar__title {
  margin: 0;
  font-size: 1.05rem;
  font-weight: 650;
  letter-spacing: -0.01em;
}

.bar__count {
  margin: 0;
  font-size: 0.95rem;
  color: var(--muted);
  font-variant-numeric: tabular-nums;
}

.bar__count b { color: var(--text); }

.wrap {
  max-width: 960px;
  margin: 0 auto;
  padding: 0.9rem;
}

.grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(72px, 1fr));
  gap: 0.5rem;
}

.lab {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.55rem 0.6rem;
  background: var(--panel);
  border: 1px solid var(--line);
  border-radius: 0.6rem;
  cursor: pointer;
  font-variant-numeric: tabular-nums;
  user-select: none;
}

.lab:has(input:checked) {
  border-color: var(--accent);
  background: color-mix(in srgb, var(--accent) 12%, var(--panel));
}

.lab input {
  flex: none;
  width: 1.05rem;
  height: 1.05rem;
  margin: 0;
  accent-color: var(--accent);
  cursor: pointer;
}

.lab__num { font-weight: 600; letter-spacing: 0.01em; }

.lab:has(input:checked) .lab__num { color: var(--accent); }

.error {
  margin: 1rem 0 0;
  padding: 0.6rem 0.75rem;
  border: 1px solid var(--danger);
  border-radius: 0.6rem;
  color: var(--danger);
  font-size: 0.9rem;
}

@media (min-width: 640px) {
  .wrap { padding: 1.25rem; }
  .grid { grid-template-columns: repeat(auto-fill, minmax(84px, 1fr)); gap: 0.6rem; }
}