/* 中国象棋 - 响应式样式 */
* {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
  -webkit-tap-highlight-color: transparent;
}

:root {
  --wood-dark: #5d4037;
  --wood-mid: #8d6e63;
  --wood-light: #d7ccc8;
  --red: #c62828;
  --red-light: #ffcdd2;
  --black: #212121;
  --black-light: #e0e0e0;
  --highlight: #ffeb3b;
  --selected: #4caf50;
  --bg: #f5f0e6;
}

html, body {
  width: 100%;
  height: 100%;
  overflow: hidden;
  font-family: "Microsoft YaHei", "PingFang SC", "Noto Sans SC", sans-serif;
  background: var(--bg);
}

#app {
  width: 100%;
  height: 100%;
  display: flex;
  flex-direction: column;
  align-items: center;
  padding: 8px;
}

.game-header {
  width: 100%;
  max-width: 560px;
  display: flex;
  flex-direction: column;
  gap: 8px;
  padding: 8px 0;
}

.logo {
  font-size: 1.3rem;
  font-weight: 700;
  color: var(--wood-dark);
  text-align: center;
  letter-spacing: 2px;
}

.top-controls {
  display: flex;
  justify-content: center;
  gap: 12px;
}

.mode-btn {
  flex: 1;
  max-width: 140px;
  padding: 8px 12px;
  border: 2px solid var(--wood-mid);
  background: #fff;
  color: var(--wood-dark);
  border-radius: 20px;
  font-size: 0.95rem;
  cursor: pointer;
  transition: all 0.2s;
}

.mode-btn.active {
  background: var(--wood-dark);
  color: #fff;
  border-color: var(--wood-dark);
}

.mode-btn:active {
  transform: scale(0.96);
}

.status-bar {
  width: 100%;
  max-width: 560px;
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 8px 12px;
  background: #fff;
  border-radius: 10px;
  box-shadow: 0 2px 6px rgba(0,0,0,0.08);
  margin: 6px 0 10px;
  font-size: 0.95rem;
}

#turn-indicator {
  font-weight: 700;
}

.turn-red { color: var(--red); }
.turn-black { color: var(--black); }

.board-wrap {
  width: 100%;
  max-width: 560px;
  flex: 1;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 4px;
}

.board {
  position: relative;
  width: 100%;
  aspect-ratio: 9 / 10;
  background: linear-gradient(135deg, #f3e5ab 0%, #e6d09c 100%);
  border: 4px solid var(--wood-dark);
  border-radius: 6px;
  box-shadow: 0 8px 24px rgba(0,0,0,0.25), inset 0 0 60px rgba(93,64,55,0.15);
  overflow: hidden;
  touch-action: none;
}

.board-area {
  position: absolute;
  inset: 4%;
  width: 92%;
  height: 92%;
}

.board-svg {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  z-index: 1;
}

.board-line {
  stroke: var(--wood-dark);
  stroke-width: 0.035;
  stroke-linecap: square;
}

.board-diagonal {
  stroke: var(--wood-dark);
  stroke-width: 0.03;
}

.river-text {
  fill: var(--wood-dark);
  font-size: 0.35px;
  font-family: "KaiTi", "STKaiti", serif;
  opacity: 0.7;
}

.pieces-layer {
  position: absolute;
  inset: 0;
  z-index: 2;
}

.markers-layer {
  position: absolute;
  inset: 0;
  z-index: 3;
  pointer-events: none;
}

.piece {
  position: absolute;
  width: 8.5%;
  height: 7.65%;
  transform: translate(-50%, -50%);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: 900;
  font-size: clamp(14px, 5.5vw, 30px);
  cursor: pointer;
  user-select: none;
  transition: transform 0.15s, box-shadow 0.15s;
  box-shadow: 0 3px 6px rgba(0,0,0,0.35), inset 0 -2px 4px rgba(0,0,0,0.15);
}

.piece.red {
  background: radial-gradient(circle at 35% 30%, #fff 0%, var(--red-light) 40%, #ef9a9a 100%);
  color: var(--red);
  border: 2px solid var(--red);
}

.piece.black {
  background: radial-gradient(circle at 35% 30%, #fff 0%, var(--black-light) 40%, #bdbdbd 100%);
  color: var(--black);
  border: 2px solid var(--black);
}

.piece.selected {
  box-shadow: 0 0 0 4px var(--selected), 0 5px 12px rgba(0,0,0,0.4);
  transform: translate(-50%, -50%) scale(1.08);
}

.piece.last-move {
  box-shadow: 0 0 0 3px var(--highlight);
}

.marker {
  position: absolute;
  transform: translate(-50%, -50%);
  border-radius: 50%;
  pointer-events: none;
}

.marker.dot {
  width: 3.5%;
  height: 3.15%;
  background: rgba(76, 175, 80, 0.55);
  border: 1px solid rgba(76, 175, 80, 0.8);
}

.marker.capture {
  width: 8.5%;
  height: 7.65%;
  border: 3px dashed var(--red);
  background: rgba(255, 0, 0, 0.12);
}

.bottom-controls {
  width: 100%;
  max-width: 560px;
  display: flex;
  justify-content: center;
  gap: 12px;
  padding: 12px 0 8px;
}

.ctrl-btn {
  flex: 1;
  max-width: 130px;
  padding: 10px 6px;
  border: none;
  border-radius: 8px;
  background: #fff;
  color: var(--wood-dark);
  font-size: 0.95rem;
  font-weight: 600;
  box-shadow: 0 2px 6px rgba(0,0,0,0.12);
  cursor: pointer;
  transition: transform 0.15s, background 0.15s;
}

.ctrl-btn:active {
  transform: scale(0.95);
}

.ctrl-btn.primary {
  background: var(--wood-dark);
  color: #fff;
}

.ctrl-btn:disabled {
  opacity: 0.5;
  cursor: not-allowed;
}

.help-text {
  text-align: center;
  color: var(--wood-mid);
  font-size: 0.8rem;
  line-height: 1.6;
  padding: 4px 8px 12px;
}

.modal {
  position: fixed;
  inset: 0;
  background: rgba(0,0,0,0.55);
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: 100;
  opacity: 1;
  transition: opacity 0.2s;
}

.modal.hidden {
  display: none;
  opacity: 0;
}

.modal-box {
  background: #fff;
  padding: 28px 32px;
  border-radius: 16px;
  text-align: center;
  box-shadow: 0 12px 36px rgba(0,0,0,0.3);
  max-width: 86%;
  min-width: 260px;
}

.modal-box h2 {
  color: var(--wood-dark);
  margin-bottom: 12px;
  font-size: 1.3rem;
}

.modal-box p {
  color: #555;
  margin-bottom: 20px;
  font-size: 1rem;
}

@media (min-width: 640px) {
  .piece {
    font-size: 30px;
  }
}

@media (max-height: 640px) {
  .help-text {
    display: none;
  }
}