/* board.css — 3×3 grid & cells */

/* Wrapper: relative for result overlay */
.game-container {
  position: relative;
}

.board {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: var(--cell-gap);
  width: var(--board-size);
  height: var(--board-size);
  background: var(--color-line);
  border-radius: var(--border-radius);
  padding: var(--cell-gap);
  box-shadow: 0 4px 20px rgba(0, 0, 0, 0.08);
}

.cell {
  background: var(--color-surface);
  border-radius: 8px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: var(--font-size-symbol);
  font-weight: 800;
  cursor: pointer;
  position: relative;
  touch-action: manipulation; /* OQ-03: remove 300ms delay */
  transition: background var(--transition-fast);
  /* Minimum touch target */
  min-width: 44px;
  min-height: 44px;
}

.cell:hover:not(.taken):not(.locked) {
  background: #F3F4F6;
}

.cell.taken {
  cursor: default;
  pointer-events: none;
}

/* Preview symbol on hover (empty cell) */
.cell:not(.taken):not(.locked)::before {
  content: attr(data-preview);
  position: absolute;
  font-size: var(--font-size-symbol);
  font-weight: 800;
  opacity: 0;
  transition: opacity var(--transition-fast);
}

.cell:hover:not(.taken):not(.locked)::before {
  opacity: 0.18;
}

/* Rendered symbols */
.cell[data-value="X"] {
  color: var(--color-x);
}

.cell[data-value="O"] {
  color: var(--color-o);
}

/* Winning highlight */
.cell.win-highlight {
  background: var(--color-win-hl);
  animation: winPulse 0.5s ease 3;
}

/* Locked state (AI thinking or game over) */
.board.locked .cell {
  cursor: not-allowed;
}

.board.locked .cell:not(.taken) {
  pointer-events: none;
}

/* ── Result overlay ── */
.result-overlay {
  position: absolute;
  inset: 0;
  border-radius: var(--border-radius);
  background: var(--color-overlay-bg);
  display: flex;
  align-items: center;
  justify-content: center;
  backdrop-filter: blur(3px);
  animation: overlayIn 0.25s ease forwards;
}

.result-content {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: var(--gap-md);
  text-align: center;
  padding: var(--gap-lg);
}

.result-emoji {
  font-size: clamp(2.5rem, 10vw, 4rem);
  line-height: 1;
}

.result-message {
  font-size: clamp(1.3rem, 5vw, 1.8rem);
  font-weight: 700;
  color: #FFFFFF;
  letter-spacing: -0.01em;
}

.restart-btn {
  margin-top: var(--gap-sm);
  padding: 0.6em 1.8em;
  background: var(--color-accent);
  color: #FFFFFF;
  font-size: clamp(0.9rem, 3vw, 1rem);
  font-weight: 600;
  border-radius: 9999px;
  transition: background var(--transition-fast),
              transform var(--transition-fast);
  animation: btnAppear 0.2s ease forwards;
}

.restart-btn:hover {
  background: var(--color-accent-dark);
  transform: scale(1.05);
}

.restart-btn:active {
  transform: scale(0.97);
}