.game-board {
  position: relative;
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 0.5rem;
  width: clamp(240px, 48vw, 480px);
  aspect-ratio: 1;
}

.cell {
  display: flex;
  justify-content: center;
  align-items: center;
  aspect-ratio: 1 / 1;
  background-color: var(--color-surface);
  border: var(--border-size) solid var(--color-border);
  border-radius: var(--border-radius);
  padding: 0;
  font: inherit;
  appearance: none;
  cursor: pointer;
  transition:
    transform var(--transition-fast),
    background-color var(--transition-fast),
    box-shadow var(--transition-fast);
}

.cell img {
  width: 80%;
  height: 80%;
}

.cell:hover:not(:disabled) {
  transform: scale(1.03);
  background-color: rgba(255, 255, 255, 0.05);
  box-shadow: var(--shadow-glow);
}

.cell:disabled {
  cursor: default;
}

.cell.is-winner {
  border-color: var(--color-primary);
  box-shadow: var(--shadow-glow);
}

.cell:focus-visible {
  outline: 2px solid var(--color-primary);
  outline-offset: 2px;
}