/* 西洋棋 - 專屬補充樣式（其餘沿用 assets/common.css） */

:root {
  --board-dark: #769656;
  --board-light: #eeeed2;
  --highlight: #f6f66988;
  --select: #f59f00aa;
}

.canvas-wrapper {
  margin: 16px 0;
  padding: 10px;
  background: rgba(0, 0, 0, 0.2);
  border-radius: 12px;
  box-shadow: 0 8px 24px rgba(0,0,0,0.25);
}

#chessCanvas {
  background: #000;
  border-radius: 10px;
  max-width: 100%;
  height: auto;
}

.leaderboard-top-button {
  position: fixed;
  top: 20px;
  right: 20px;
  z-index: 1001;
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 12px 20px;
  background: linear-gradient(135deg, #FFD700 0%, #FFA500 100%);
  color: #333;
  text-decoration: none;
  font-weight: 600;
  border-radius: 50px;
  box-shadow: 0 6px 20px rgba(255, 215, 0, 0.4);
  transition: all 0.3s ease;
  border: 2px solid rgba(255, 255, 255, 0.3);
}
.leaderboard-top-button:hover {
  transform: translateY(-3px);
  box-shadow: 0 8px 25px rgba(255, 215, 0, 0.5);
  background: linear-gradient(135deg, #FFA500 0%, #FFD700 100%);
}
.leaderboard-top-button:active {
  transform: translateY(-1px);
}
.leaderboard-top-button span:first-child {
  font-size: 1.2em;
}

.status {
  text-align: center;
  font-weight: 600;
  margin: 4px 0 8px;
}

.hint {
  text-align: center;
  opacity: .9;
  font-size: 0.95em;
  margin-top: 8px;
}

/* 操作按鈕組置中 */
.action-buttons {
  display: flex;
  gap: 15px;
  justify-content: center;
  flex-wrap: wrap;
  margin-top: 15px;
}

@media (max-width: 768px) {
  .leaderboard-top-button {
    top: 10px;
    right: 10px;
    padding: 10px 16px;
    font-size: 0.9em;
  }
  .leaderboard-top-button span:last-child {
    display: none;
  }
}

@media (max-width: 480px) {
  .leaderboard-top-button {
    top: 8px;
    right: 8px;
    padding: 8px 12px;
    font-size: 0.85em;
  }
}