#stage.ttt-stage {
  aspect-ratio: 1;
  display: grid;
  place-items: center;
  padding: 1rem;
}

.ttt-board {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 0.45rem;
  width: min(100%, 300px);
}

.ttt-board button {
  aspect-ratio: 1;
  border: 1px solid var(--line);
  background: #10141a;
  color: var(--paper);
  font-family: var(--font-display);
  font-size: 2.6rem;
  letter-spacing: 0.04em;
  cursor: pointer;
  border-radius: 4px;
}

.ttt-board button:hover:not(:disabled) {
  border-color: var(--acid);
}

.ttt-board button:disabled {
  cursor: default;
}

.ttt-board button.win {
  color: var(--acid);
  border-color: var(--acid);
}

.hud select {
  background: #12151a;
  color: var(--paper);
  border: 1px solid var(--line);
  border-radius: 6px;
  padding: 0.2rem 0.35rem;
  font: inherit;
  margin-left: 0.35rem;
}