/* Chess Demo — WildflowerJS */
:root {
  --board-light: #f0d9b5;
  --board-dark: #b58863;
  --bg-primary: #1a1a2e;
  --bg-secondary: #16213e;
  --bg-card: #1e2a45;
  --text-primary: #e0e0e0;
  --text-secondary: #a0a0b0;
  --accent: #e94560;
  --accent-hover: #ff6b81;
  --border: #2a3a5c;
}

* { margin: 0; padding: 0; box-sizing: border-box; }

body {
  font-family: 'Segoe UI', system-ui, -apple-system, sans-serif;
  background: var(--bg-primary);
  color: var(--text-primary);
  min-height: 100vh;
}

.app-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 12px 24px;
  background: var(--bg-secondary);
  border-bottom: 1px solid var(--border);
  flex-wrap: wrap;
  gap: 8px;
}

.app-header h1 {
  font-size: 1.3rem;
  font-weight: 600;
  color: var(--text-primary);
}

.app-header h1 span {
  color: var(--accent);
  font-weight: 400;
  font-size: 0.85rem;
  margin-left: 8px;
}

.header-buttons {
  display: flex;
  gap: 8px;
}

.btn {
  padding: 6px 14px;
  border: 1px solid var(--border);
  border-radius: 6px;
  background: var(--bg-card);
  color: var(--text-primary);
  cursor: pointer;
  font-size: 0.85rem;
  transition: background 0.15s, border-color 0.15s;
}

.btn:hover {
  background: var(--bg-secondary);
  border-color: var(--accent);
}

.btn:disabled {
  opacity: 0.4;
  cursor: not-allowed;
}

.btn-primary {
  background: var(--accent);
  border-color: var(--accent);
  color: #fff;
}

.btn-primary:hover {
  background: var(--accent-hover);
}

.main-layout {
  display: flex;
  gap: 20px;
  padding: 20px 24px;
  max-width: 920px;
  margin: 0 auto;
  align-items: flex-start;
}

/* Board container */
.board-wrapper {
  flex-shrink: 0;
}

#board {
  width: 400px;
  height: 400px;
  border-radius: 4px;
  overflow: hidden;
}

/* Board themes — applied dynamically via _applyTheme().
   Each theme class sets the board background as two colored squares
   tiled in a checkerboard pattern using a repeating-conic-gradient. */
cg-board {
  background:
    linear-gradient(145deg, rgba(255,255,255,0.08) 0%, transparent 50%, rgba(0,0,0,0.06) 100%),
    repeating-conic-gradient(
      var(--board-dark) 0% 25%, var(--board-light) 0% 50%
    ) 0 0 / 25% 25% !important;
}

/* ─── Piece set themes ─────────────────────────────────────────────
   Each set overrides chessground's default cburnett pieces via
   background-image pointing to Lichess's open-source SVG files.
   Activated by adding a class to the #board element.            */

.pieces-merida piece.king.white   { background-image: url('https://raw.githubusercontent.com/lichess-org/lila/master/public/piece/merida/wK.svg') !important; }
.pieces-merida piece.queen.white  { background-image: url('https://raw.githubusercontent.com/lichess-org/lila/master/public/piece/merida/wQ.svg') !important; }
.pieces-merida piece.rook.white   { background-image: url('https://raw.githubusercontent.com/lichess-org/lila/master/public/piece/merida/wR.svg') !important; }
.pieces-merida piece.bishop.white { background-image: url('https://raw.githubusercontent.com/lichess-org/lila/master/public/piece/merida/wB.svg') !important; }
.pieces-merida piece.knight.white { background-image: url('https://raw.githubusercontent.com/lichess-org/lila/master/public/piece/merida/wN.svg') !important; }
.pieces-merida piece.pawn.white   { background-image: url('https://raw.githubusercontent.com/lichess-org/lila/master/public/piece/merida/wP.svg') !important; }
.pieces-merida piece.king.black   { background-image: url('https://raw.githubusercontent.com/lichess-org/lila/master/public/piece/merida/bK.svg') !important; }
.pieces-merida piece.queen.black  { background-image: url('https://raw.githubusercontent.com/lichess-org/lila/master/public/piece/merida/bQ.svg') !important; }
.pieces-merida piece.rook.black   { background-image: url('https://raw.githubusercontent.com/lichess-org/lila/master/public/piece/merida/bR.svg') !important; }
.pieces-merida piece.bishop.black { background-image: url('https://raw.githubusercontent.com/lichess-org/lila/master/public/piece/merida/bB.svg') !important; }
.pieces-merida piece.knight.black { background-image: url('https://raw.githubusercontent.com/lichess-org/lila/master/public/piece/merida/bN.svg') !important; }
.pieces-merida piece.pawn.black   { background-image: url('https://raw.githubusercontent.com/lichess-org/lila/master/public/piece/merida/bP.svg') !important; }

.pieces-california piece.king.white   { background-image: url('https://raw.githubusercontent.com/lichess-org/lila/master/public/piece/california/wK.svg') !important; }
.pieces-california piece.queen.white  { background-image: url('https://raw.githubusercontent.com/lichess-org/lila/master/public/piece/california/wQ.svg') !important; }
.pieces-california piece.rook.white   { background-image: url('https://raw.githubusercontent.com/lichess-org/lila/master/public/piece/california/wR.svg') !important; }
.pieces-california piece.bishop.white { background-image: url('https://raw.githubusercontent.com/lichess-org/lila/master/public/piece/california/wB.svg') !important; }
.pieces-california piece.knight.white { background-image: url('https://raw.githubusercontent.com/lichess-org/lila/master/public/piece/california/wN.svg') !important; }
.pieces-california piece.pawn.white   { background-image: url('https://raw.githubusercontent.com/lichess-org/lila/master/public/piece/california/wP.svg') !important; }
.pieces-california piece.king.black   { background-image: url('https://raw.githubusercontent.com/lichess-org/lila/master/public/piece/california/bK.svg') !important; }
.pieces-california piece.queen.black  { background-image: url('https://raw.githubusercontent.com/lichess-org/lila/master/public/piece/california/bQ.svg') !important; }
.pieces-california piece.rook.black   { background-image: url('https://raw.githubusercontent.com/lichess-org/lila/master/public/piece/california/bR.svg') !important; }
.pieces-california piece.bishop.black { background-image: url('https://raw.githubusercontent.com/lichess-org/lila/master/public/piece/california/bB.svg') !important; }
.pieces-california piece.knight.black { background-image: url('https://raw.githubusercontent.com/lichess-org/lila/master/public/piece/california/bN.svg') !important; }
.pieces-california piece.pawn.black   { background-image: url('https://raw.githubusercontent.com/lichess-org/lila/master/public/piece/california/bP.svg') !important; }

.pieces-alpha piece.king.white   { background-image: url('https://raw.githubusercontent.com/lichess-org/lila/master/public/piece/alpha/wK.svg') !important; }
.pieces-alpha piece.queen.white  { background-image: url('https://raw.githubusercontent.com/lichess-org/lila/master/public/piece/alpha/wQ.svg') !important; }
.pieces-alpha piece.rook.white   { background-image: url('https://raw.githubusercontent.com/lichess-org/lila/master/public/piece/alpha/wR.svg') !important; }
.pieces-alpha piece.bishop.white { background-image: url('https://raw.githubusercontent.com/lichess-org/lila/master/public/piece/alpha/wB.svg') !important; }
.pieces-alpha piece.knight.white { background-image: url('https://raw.githubusercontent.com/lichess-org/lila/master/public/piece/alpha/wN.svg') !important; }
.pieces-alpha piece.pawn.white   { background-image: url('https://raw.githubusercontent.com/lichess-org/lila/master/public/piece/alpha/wP.svg') !important; }
.pieces-alpha piece.king.black   { background-image: url('https://raw.githubusercontent.com/lichess-org/lila/master/public/piece/alpha/bK.svg') !important; }
.pieces-alpha piece.queen.black  { background-image: url('https://raw.githubusercontent.com/lichess-org/lila/master/public/piece/alpha/bQ.svg') !important; }
.pieces-alpha piece.rook.black   { background-image: url('https://raw.githubusercontent.com/lichess-org/lila/master/public/piece/alpha/bR.svg') !important; }
.pieces-alpha piece.bishop.black { background-image: url('https://raw.githubusercontent.com/lichess-org/lila/master/public/piece/alpha/bB.svg') !important; }
.pieces-alpha piece.knight.black { background-image: url('https://raw.githubusercontent.com/lichess-org/lila/master/public/piece/alpha/bN.svg') !important; }
.pieces-alpha piece.pawn.black   { background-image: url('https://raw.githubusercontent.com/lichess-org/lila/master/public/piece/alpha/bP.svg') !important; }

.pieces-staunty piece.king.white   { background-image: url('https://raw.githubusercontent.com/lichess-org/lila/master/public/piece/staunty/wK.svg') !important; }
.pieces-staunty piece.queen.white  { background-image: url('https://raw.githubusercontent.com/lichess-org/lila/master/public/piece/staunty/wQ.svg') !important; }
.pieces-staunty piece.rook.white   { background-image: url('https://raw.githubusercontent.com/lichess-org/lila/master/public/piece/staunty/wR.svg') !important; }
.pieces-staunty piece.bishop.white { background-image: url('https://raw.githubusercontent.com/lichess-org/lila/master/public/piece/staunty/wB.svg') !important; }
.pieces-staunty piece.knight.white { background-image: url('https://raw.githubusercontent.com/lichess-org/lila/master/public/piece/staunty/wN.svg') !important; }
.pieces-staunty piece.pawn.white   { background-image: url('https://raw.githubusercontent.com/lichess-org/lila/master/public/piece/staunty/wP.svg') !important; }
.pieces-staunty piece.king.black   { background-image: url('https://raw.githubusercontent.com/lichess-org/lila/master/public/piece/staunty/bK.svg') !important; }
.pieces-staunty piece.queen.black  { background-image: url('https://raw.githubusercontent.com/lichess-org/lila/master/public/piece/staunty/bQ.svg') !important; }
.pieces-staunty piece.rook.black   { background-image: url('https://raw.githubusercontent.com/lichess-org/lila/master/public/piece/staunty/bR.svg') !important; }
.pieces-staunty piece.bishop.black { background-image: url('https://raw.githubusercontent.com/lichess-org/lila/master/public/piece/staunty/bB.svg') !important; }
.pieces-staunty piece.knight.black { background-image: url('https://raw.githubusercontent.com/lichess-org/lila/master/public/piece/staunty/bN.svg') !important; }
.pieces-staunty piece.pawn.black   { background-image: url('https://raw.githubusercontent.com/lichess-org/lila/master/public/piece/staunty/bP.svg') !important; }

.pieces-pixel piece.king.white   { background-image: url('https://raw.githubusercontent.com/lichess-org/lila/master/public/piece/pixel/wK.svg') !important; }
.pieces-pixel piece.queen.white  { background-image: url('https://raw.githubusercontent.com/lichess-org/lila/master/public/piece/pixel/wQ.svg') !important; }
.pieces-pixel piece.rook.white   { background-image: url('https://raw.githubusercontent.com/lichess-org/lila/master/public/piece/pixel/wR.svg') !important; }
.pieces-pixel piece.bishop.white { background-image: url('https://raw.githubusercontent.com/lichess-org/lila/master/public/piece/pixel/wB.svg') !important; }
.pieces-pixel piece.knight.white { background-image: url('https://raw.githubusercontent.com/lichess-org/lila/master/public/piece/pixel/wN.svg') !important; }
.pieces-pixel piece.pawn.white   { background-image: url('https://raw.githubusercontent.com/lichess-org/lila/master/public/piece/pixel/wP.svg') !important; }
.pieces-pixel piece.king.black   { background-image: url('https://raw.githubusercontent.com/lichess-org/lila/master/public/piece/pixel/bK.svg') !important; }
.pieces-pixel piece.queen.black  { background-image: url('https://raw.githubusercontent.com/lichess-org/lila/master/public/piece/pixel/bQ.svg') !important; }
.pieces-pixel piece.rook.black   { background-image: url('https://raw.githubusercontent.com/lichess-org/lila/master/public/piece/pixel/bR.svg') !important; }
.pieces-pixel piece.bishop.black { background-image: url('https://raw.githubusercontent.com/lichess-org/lila/master/public/piece/pixel/bB.svg') !important; }
.pieces-pixel piece.knight.black { background-image: url('https://raw.githubusercontent.com/lichess-org/lila/master/public/piece/pixel/bN.svg') !important; }
.pieces-pixel piece.pawn.black   { background-image: url('https://raw.githubusercontent.com/lichess-org/lila/master/public/piece/pixel/bP.svg') !important; }

/* Sidebar */
.sidebar {
  flex: 1;
  min-width: 220px;
  display: flex;
  flex-direction: column;
  gap: 14px;
}

.panel {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 12px 14px;
}

.panel-title {
  font-size: 0.75rem;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  color: var(--text-secondary);
  margin-bottom: 8px;
}

/* Status */
.status-text {
  font-size: 1.05rem;
  font-weight: 600;
}

.status-text.thinking {
  color: #ffc107;
}

.status-text.game-over {
  color: var(--accent);
}

/* Captured pieces */
.captured-row {
  font-size: 1.3rem;
  letter-spacing: 2px;
  min-height: 1.6em;
  line-height: 1.6;
}

.captured-label {
  font-size: 0.7rem;
  color: var(--text-secondary);
  text-transform: uppercase;
  margin-bottom: 2px;
}

/* Move list */
.move-list-container {
  max-height: 220px;
  overflow-y: auto;
  scrollbar-width: thin;
  scrollbar-color: var(--border) transparent;
}

.move-list-container::-webkit-scrollbar {
  width: 6px;
}

.move-list-container::-webkit-scrollbar-thumb {
  background: var(--border);
  border-radius: 3px;
}

.move-row {
  display: grid;
  grid-template-columns: 32px 1fr 1fr;
  gap: 4px;
  padding: 3px 4px;
  font-size: 0.85rem;
  font-family: 'Consolas', 'Monaco', monospace;
  border-radius: 3px;
}

.move-row:nth-child(odd) {
  background: rgba(255,255,255,0.03);
}

.move-num {
  color: var(--text-secondary);
  text-align: right;
  padding-right: 4px;
}

.move-white, .move-black {
  padding: 0 4px;
}

.empty-moves {
  color: var(--text-secondary);
  font-size: 0.85rem;
  font-style: italic;
}

/* Controls */
.control-row {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 8px;
  margin-bottom: 8px;
}

.control-row:last-child {
  margin-bottom: 0;
}

.control-row label {
  font-size: 0.85rem;
  color: var(--text-secondary);
}

.control-row select {
  padding: 4px 8px;
  border: 1px solid var(--border);
  border-radius: 4px;
  background: var(--bg-secondary);
  color: var(--text-primary);
  font-size: 0.85rem;
  cursor: pointer;
}

/* Footer */
.app-footer {
  text-align: center;
  padding: 16px;
  font-size: 0.75rem;
  color: var(--text-secondary);
  border-top: 1px solid var(--border);
  margin-top: 20px;
}

.app-footer a {
  color: var(--accent);
  text-decoration: none;
}

/* Responsive */
@media (max-width: 780px) {
  .main-layout {
    flex-direction: column;
    align-items: center;
    padding: 12px;
  }

  #board {
    width: min(400px, calc(100vw - 24px));
    height: min(400px, calc(100vw - 24px));
  }

  .sidebar {
    width: 100%;
    max-width: 400px;
  }
}

@media (max-width: 420px) {
  #board {
    width: calc(100vw - 24px);
    height: calc(100vw - 24px);
  }

  .app-header {
    padding: 10px 12px;
  }

  .app-header h1 {
    font-size: 1.1rem;
  }
}