.ultimate-board {
  position: relative;
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 0.6rem;
  width: clamp(280px, 90vw, 580px);
  aspect-ratio: 1;
}

.mini-board {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 3px;
  padding: 4px;
  border: 2px solid var(--color-border);
  border-radius: var(--border-radius);
  position: relative;
  aspect-ratio: 1;
  transition:
    border-color 180ms ease,
    box-shadow 180ms ease,
    opacity 180ms ease;
}

.mini-board.is-targeted {
  border-color: var(--color-primary);
  box-shadow: var(--shadow-glow);
}

.mini-board.is-free-choice {
  border-color: var(--color-primary-muted);
}

.mini-board.is-dimmed {
  opacity: 0.3;
  pointer-events: none;
}

.mini-board.is-global-winner {
  border-color: var(--color-primary);
  box-shadow: var(--shadow-glow-strong);
}

.ultimate-cell {
  display: flex;
  justify-content: center;
  align-items: center;
  aspect-ratio: 1;
  background-color: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: 0.4rem;
  padding: 0;
  font: inherit;
  appearance: none;
  cursor: pointer;
  transition:
    transform var(--transition-fast),
    background-color var(--transition-fast);
}

.ultimate-cell img {
  width: 75%;
  height: 75%;
}

.ultimate-cell:hover:not(:disabled) {
  transform: scale(1.06);
  background-color: rgba(255, 255, 255, 0.05);
}

.ultimate-cell:disabled {
  cursor: default;
}

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

.mini-board.is-won .ultimate-cell {
  pointer-events: none;
}

.mini-board-overlay {
  position: absolute;
  inset: 0;
  display: flex;
  align-items: center;
  justify-content: center;
  background: rgba(15, 23, 42, 0.82);
  border-radius: calc(var(--border-radius) - 2px);
}

.mini-board-overlay img {
  width: 62%;
  height: 62%;
}

.mini-board-draw {
  background: rgba(51, 65, 85, 0.75);
}