/* Board Container */
.board {
  --tile-size: clamp(18px, 3.2vw, 68px);
  --tile-gap: clamp(2px, 0.25vw, 6px);

  position: relative;
  background: var(--theme-board-bg, #1A1A1A);
  border-radius: 20px;
  padding: 16px 12px 52px;
  width: 100%;
  box-shadow:
    0 8px 32px rgba(0, 0, 0, 0.4),
    inset 0 0 0 1px rgba(255, 255, 255, 0.05),
    0 -2px 8px rgba(0, 0, 0, 0.2);
  overflow: hidden;
}

/* Better padding on larger screens */
@media (min-width: 768px) {
  .board {
    padding: 32px 52px 44px;
  }
}

/* Fullscreen mode - fit grid to viewport */
:fullscreen .board {
  padding: 2px;
}

/* Portrait fullscreen - fit 22 columns */
@media (orientation: portrait) {
  :fullscreen .board {
    /* Calculate: (viewport_width - padding) / 22 tiles */
    /* Then subtract a bit for gaps between tiles */
    --tile-size: calc((100vw - 4px) / 23);
    --tile-gap: 2px;
    padding: 2px;
  }
  
  :fullscreen .settings-tiles {
    bottom: 4px;
  }
}

/* Landscape fullscreen - fit 7 rows */
@media (orientation: landscape) {
  :fullscreen .board {
    /* Calculate: (viewport_height - padding - settings) / 7 rows */
    --tile-size: calc((100vh - 60px) / 7.5);
    --tile-gap: 2px;
    padding: 2px 2px 50px 2px;
  }
  
  :fullscreen .settings-tiles {
    bottom: 4px;
  }
  
  /* Collapsed state in landscape fullscreen - show only hamburger menu */
  :fullscreen .settings-tiles.collapsed {
    justify-content: flex-end;
  }
  
  :fullscreen .settings-tiles.collapsed .settings-tile:not(.menu-toggle) {
    display: none;
  }
  
  /* Expanded state shows all buttons */
  :fullscreen .settings-tiles.expanded {
    justify-content: center;
    flex-wrap: wrap;
    gap: calc(var(--tile-gap) * 1.5);
    max-width: 90vw;
    left: 50%;
    transform: translateX(-50%);
    background: rgba(0, 0, 0, 0.8);
    padding: calc(var(--tile-gap) * 2);
    border-radius: 6px;
    backdrop-filter: blur(8px);
  }
  
  :fullscreen .settings-tiles.expanded .settings-tile {
    opacity: 0.8;
  }
  
  :fullscreen .settings-tiles.expanded .menu-toggle {
    position: absolute;
    right: calc(var(--tile-gap) * 2);
    top: calc(var(--tile-gap) * 2);
  }
}

/* Vintage grain texture overlay */
.board::before {
  content: '';
  position: absolute;
  inset: 0;
  background-image: 
    repeating-linear-gradient(0deg, transparent, transparent 2px, rgba(0, 0, 0, 0.03) 2px, rgba(0, 0, 0, 0.03) 4px),
    repeating-linear-gradient(90deg, transparent, transparent 2px, rgba(0, 0, 0, 0.03) 2px, rgba(0, 0, 0, 0.03) 4px);
  opacity: 0.3;
  pointer-events: none;
  z-index: 1;
}

/* Simplify in fullscreen mobile */
@media (max-width: 767px) {
  :fullscreen .board::before {
    opacity: 0.15;
  }
}

/* Tile Grid */
.tile-grid {
  display: grid;
  grid-template-columns: repeat(var(--grid-cols, 22), var(--tile-size));
  grid-template-rows: repeat(var(--grid-rows, 5), var(--tile-size));
  gap: var(--tile-gap);
  justify-content: center;
}

/* Accent Squares — small stacked blocks in top corners */
.accent-bar {
  position: absolute;
  top: 30px;
  display: flex;
  flex-direction: column;
  gap: 3px;
  z-index: 5;
}

.accent-bar-left {
  left: 18px;
}

.accent-bar-right {
  right: 18px;
}

.accent-segment {
  width: 14px;
  height: 14px;
  border-radius: 2px;
  transition: background-color 0.5s ease;
}

/* Hide accent bars in fullscreen on mobile */
@media (max-width: 767px) {
  :fullscreen .accent-bar {
    display: none;
  }
  
  :fullscreen .keyboard-hint {
    display: none;
  }
  
  :fullscreen .shortcuts-overlay {
    display: none;
  }
}

/* Keyboard Shortcut Indicator */
.keyboard-hint {
  position: absolute;
  bottom: 12px;
  left: 16px;
  width: 28px;
  height: 28px;
  border-radius: 50%;
  background: rgba(255, 255, 255, 0.08);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 12px;
  font-weight: 700;
  color: rgba(255, 255, 255, 0.35);
  cursor: pointer;
  transition: background 0.2s;
}

.keyboard-hint:hover {
  background: rgba(255, 255, 255, 0.15);
}

/* Shortcuts Overlay */
.shortcuts-overlay {
  display: none;
  position: absolute;
  bottom: 48px;
  left: 16px;
  background: rgba(0, 0, 0, 0.95);
  border: 1px solid rgba(255, 255, 255, 0.15);
  border-radius: 10px;
  padding: 16px 20px;
  font-size: 13px;
  color: rgba(255, 255, 255, 0.85);
  z-index: 10;
  min-width: 200px;
  box-shadow: 0 8px 24px rgba(0, 0, 0, 0.5);
}

.shortcuts-overlay.visible {
  display: block;
}

.shortcuts-overlay div {
  display: flex;
  justify-content: space-between;
  padding: 6px 0;
}

.shortcuts-overlay kbd {
  background: rgba(255, 255, 255, 0.15);
  padding: 2px 8px;
  border-radius: 4px;
  font-family: 'Courier New', monospace;
  font-size: 12px;
  margin-left: 20px;
  font-weight: 700;
  border: 1px solid rgba(255, 255, 255, 0.1);
}

/* Settings tiles (bottom row on mobile) */
.settings-tiles {
  display: none;
  position: absolute;
  bottom: 8px;
  left: 8px;
  right: 8px;
  justify-content: center;
  gap: calc(var(--tile-gap) * 2);
  z-index: 10;
  pointer-events: none;
  transition: all 0.3s ease;
}

@media (max-width: 767px) {
  .settings-tiles {
    display: flex;
  }
}

.settings-tile {
  min-width: calc(var(--tile-size) * 2.5);
  height: var(--tile-size);
  background: #1A1A1A;
  border-radius: 3px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: calc(var(--tile-size) * 0.35);
  font-weight: 700;
  color: #555;
  cursor: pointer;
  transition: all 0.2s;
  pointer-events: auto;
  box-shadow:
    0 2px 4px rgba(0, 0, 0, 0.5),
    inset 0 0 0 1px rgba(255, 255, 255, 0.03),
    inset 0 2px 6px rgba(0, 0, 0, 0.6);
  opacity: 0.5;
  padding: 0 8px;
}

/* Fullscreen button is more prominent */
.settings-tile-primary {
  background: #333;
  color: #AAA;
  opacity: 0.8;
  font-weight: 900;
  font-size: calc(var(--tile-size) * 0.4);
}

.settings-tile:active {
  opacity: 0.7;
  transform: scale(0.96);
}

.settings-tile-primary:active {
  opacity: 1;
  transform: scale(0.96);
}

.settings-tile.active {
  color: #777;
  opacity: 0.7;
  background: #252525;
}

/* Make sure buttons don't overlap */
@media (max-width: 767px) {
  .settings-tiles {
    flex-wrap: nowrap;
  }
  
  .settings-tile {
    flex-shrink: 0;
  }
}

/* Menu toggle button (hamburger) */
.menu-toggle {
  font-size: calc(var(--tile-size) * 0.5) !important;
  line-height: 1;
  padding: 0 !important;
  min-width: calc(var(--tile-size) * 2) !important;
}

.settings-tile.flipping {
  animation: settingFlip 300ms ease-in-out;
}

@keyframes settingFlip {
  0% { transform: rotateX(0deg); }
  50% { transform: rotateX(-90deg); }
  100% { transform: rotateX(-180deg); }
}

/* Position in fullscreen */
:fullscreen .settings-tiles {
  bottom: calc(var(--tile-gap) + 2px);
}

/* Hide on desktop - but detect mobile in landscape by max-height */
@media (min-width: 768px) and (min-height: 600px) {
  .settings-tiles {
    display: none !important;
  }
}

/* Always show in fullscreen mode, even on desktop */
:fullscreen .settings-tiles {
  display: flex !important;
}

/* Ensure mobile landscape shows menu (height < 600px is typically mobile) */
@media (max-height: 599px) {
  .settings-tiles {
    display: flex !important;
  }
}