.board {
  --tile-width: clamp(40px, 3.6vw, 54px);
  --tile-height: clamp(68px, 6.4vw, 86px);
  --tile-gap: clamp(3px, 0.22vw, 4px);

  position: relative;
  width: min-content;
  max-width: 100%;
  padding: 12px 20px;
  border-radius: 10px;
  background: #161617;
  box-shadow:
    0 6px 14px rgba(0, 0, 0, 0.11),
    0 1px 2px rgba(0, 0, 0, 0.07);
}

.board::before {
  content: '';
  position: absolute;
  inset: 0;
  border-radius: 10px;
  border: 1px solid rgba(255, 255, 255, 0.03);
  pointer-events: none;
}

.tile-grid {
  display: grid;
  grid-template-columns: repeat(var(--grid-cols, 22), var(--tile-width));
  grid-template-rows: repeat(var(--grid-rows, 6), var(--tile-height));
  gap: var(--tile-gap);
  justify-content: center;
}

.board-markers {
  display: none;
}

.keyboard-hint {
  display: none;
}

.shortcuts-overlay {
  display: block;
  position: absolute;
  right: 14px;
  bottom: 14px;
  min-width: 220px;
  padding: 10px 12px;
  border-radius: 10px;
  background: rgba(12, 12, 13, 0.84);
  border: 1px solid rgba(255, 255, 255, 0.08);
  color: rgba(244, 237, 228, 0.62);
  backdrop-filter: blur(6px);
  z-index: 10;
  opacity: 0;
  pointer-events: none;
}

.shortcuts-overlay.visible {
  opacity: 1;
  pointer-events: auto;
}

.shortcuts-overlay div {
  display: flex;
  justify-content: space-between;
  gap: 20px;
  padding: 5px 0;
  font-size: 12px;
}

.shortcuts-overlay kbd {
  min-width: 36px;
  padding: 3px 7px;
  border-radius: 999px;
  background: rgba(255, 255, 255, 0.08);
  color: rgba(244, 237, 228, 0.9);
  text-align: center;
  font: inherit;
  font-weight: 700;
  letter-spacing: 0.08em;
}