#grid {
  display: grid;
  gap: 3px;
  padding: 1rem;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  overflow: auto;
}
.cell {
  width: 100%;
  aspect-ratio: 1;
  border-radius: 4px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: clamp(0.5rem, 1.4vw, 0.75rem);
  font-weight: 600;
  font-family: 'Fira Code', Consolas, monospace;
  background: rgba(255, 255, 255, 0.05);
  color: var(--text-muted);
  transition:
    background 0.25s,
    color 0.25s,
    transform 0.15s;
  cursor: default;
}
.cell.eliminated {
  background: rgba(255, 255, 255, 0.03);
  color: rgba(255, 255, 255, 0.12);
  text-decoration: line-through;
}
.cell.prime {
  background: rgba(88, 166, 255, 0.2);
  color: var(--accent);
  transform: scale(1.08);
}
.cell.current-factor {
  background: rgba(188, 140, 255, 0.35);
  color: var(--accent2);
  transform: scale(1.15);
}
#statsBar {
  display: flex;
  gap: 1.5rem;
  flex-wrap: wrap;
  font-size: 0.85rem;
  color: var(--text-muted);
  padding: 0.5rem 0;
}
#statsBar strong {
  color: var(--text);
}
#primeList {
  font-family: 'Fira Code', Consolas, monospace;
  font-size: 0.8rem;
  color: var(--accent);
  word-break: break-all;
  line-height: 1.9;
  max-height: 160px;
  overflow-y: auto;
  padding: 0.5rem;
  background: var(--bg);
  border: 1px solid var(--border);
  border-radius: 6px;
}