/* codex: 2026-09-09 奇偶棋子谜题多端响应式与尺寸缩放样式 */
:root {
  --bg-main: #2b231c;
  --bg-card: #3a3027;
  --bg-card-border: #564739;
  --board-dark: #b58863;
  --board-light: #f0d9b5;
  --board-border: #4a3321;
  --wood-shadow: 0 12px 32px rgba(0, 0, 0, 0.5);
  --text-main: #f5ede4;
  --text-dim: #c5b4a2;
  --accent-gold: #e5b358;
  --accent-gold-hover: #f7c978;
  --color-success: #38b000;
  --color-danger: #e63946;
  --color-warning: #ffb703;
  --badge-bg-valid: rgba(56, 176, 0, 0.25);
  --badge-bg-invalid: rgba(230, 57, 70, 0.25);
  --font-family: 'PingFang SC', 'Hiragino Sans GB', 'Microsoft YaHei', sans-serif;
  --cell-size: 78px;
}

* {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
  -webkit-tap-highlight-color: transparent;
}

body {
  font-family: var(--font-family);
  background: radial-gradient(circle at 50% 20%, #3e3328 0%, #201a14 100%);
  color: var(--text-main);
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  align-items: center;
  padding: 16px;
  overflow-x: hidden;
}

header {
  text-align: center;
  margin-bottom: 16px;
  max-width: 1000px;
  width: 100%;
}

.title-wrap {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 10px;
  margin-bottom: 6px;
}

h1 {
  font-size: 1.9rem;
  font-weight: 700;
  color: var(--accent-gold);
  letter-spacing: 1px;
  text-shadow: 0 2px 5px rgba(0, 0, 0, 0.6);
}

.subtitle {
  font-size: 0.96rem;
  color: var(--text-dim);
  line-height: 1.5;
  max-width: 800px;
  margin: 0 auto;
}

.highlight {
  color: var(--accent-gold);
  font-weight: 600;
}

/* 顶部工具栏（规格切换、尺寸调节、音效） */
.toolbar-top {
  display: flex;
  justify-content: center;
  align-items: center;
  gap: 14px;
  margin-top: 12px;
  flex-wrap: wrap;
}

.toolbar-group {
  display: inline-flex;
  align-items: center;
  background: rgba(0, 0, 0, 0.25);
  padding: 3px 6px;
  border-radius: 24px;
  border: 1px solid #564739;
  gap: 4px;
}

.group-label {
  font-size: 0.8rem;
  color: var(--text-dim);
  margin: 0 4px 0 6px;
}

.size-btn, .zoom-btn {
  background: transparent;
  border: none;
  color: var(--text-dim);
  padding: 5px 12px;
  border-radius: 16px;
  cursor: pointer;
  font-size: 0.86rem;
  transition: all 0.2s ease;
}

.size-btn:hover, .zoom-btn:hover {
  color: #fff;
  background: rgba(255, 255, 255, 0.08);
}

.size-btn.active, .zoom-btn.active {
  background: var(--accent-gold);
  color: #2b2014;
  font-weight: bold;
  box-shadow: 0 0 10px rgba(229, 179, 88, 0.4);
}

.sound-toggle-btn {
  background: rgba(0, 0, 0, 0.25);
  border: 1px solid #564739;
  color: var(--text-dim);
  padding: 5px 14px;
  border-radius: 20px;
  cursor: pointer;
  font-size: 0.86rem;
  transition: all 0.2s;
}

.sound-toggle-btn:hover {
  color: #fff;
  border-color: var(--accent-gold);
}

/* 主游戏容器 */
.game-container {
  display: flex;
  gap: 28px;
  max-width: 1250px;
  width: 100%;
  justify-content: center;
  align-items: flex-start;
  flex-wrap: wrap;
}

/* 棋盘主体区 */
.board-wrapper {
  background: #34281f;
  border: 9px solid var(--board-border);
  border-radius: 14px;
  padding: 14px;
  box-shadow: var(--wood-shadow), inset 0 0 20px rgba(0, 0, 0, 0.55);
  display: flex;
  flex-direction: column;
  user-select: none;
  max-width: 100%;
}

/* 顶部列指示栏 */
.col-indicators {
  display: grid;
  margin-left: 36px;
  margin-right: 70px;
  margin-bottom: 8px;
  gap: 4px;
}

.indicator-col {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  width: var(--cell-size);
  padding: 4px 2px;
  background: rgba(0, 0, 0, 0.25);
  border-radius: 6px;
  font-size: 0.82rem;
  border: 1px solid rgba(255, 255, 255, 0.08);
  transition: all 0.25s;
}

.indicator-label { font-size: 0.76rem; color: var(--text-dim); }
.indicator-target { font-size: 0.72rem; color: var(--accent-gold); }

.indicator-count {
  font-weight: bold;
  font-size: calc(var(--cell-size) * 0.26);
  margin: 1px 0;
  min-height: 1.1em;
}

.indicator-badge {
  font-size: calc(var(--cell-size) * 0.2);
  padding: 1px 6px;
  border-radius: 4px;
  margin-top: 2px;
  font-weight: bold;
}

.badge-valid { background: var(--color-success); color: #fff; }
.badge-invalid { background: var(--badge-bg-invalid); color: var(--color-danger); border: 1px solid rgba(230, 57, 70, 0.3); }

/* 棋盘网格区 */
.board-middle {
  display: flex;
  align-items: stretch;
}

.row-labels {
  display: flex;
  flex-direction: column;
  justify-content: space-around;
  width: 36px;
  text-align: center;
  color: var(--accent-gold);
  font-weight: 600;
  font-size: 0.95rem;
}

.board-grid {
  display: grid;
  gap: 4px;
  background: #3a2c20;
  border: 4px solid #231911;
  border-radius: 6px;
}

.cell {
  position: relative;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  width: var(--cell-size);
  height: var(--cell-size);
  transition: background-color 0.15s, transform 0.1s;
  box-shadow: inset 0 0 8px rgba(0, 0, 0, 0.25);
  border-radius: 2px;
}

.cell:hover { filter: brightness(1.1); }
.cell:active { transform: scale(0.96); }
.cell.light { background-color: var(--board-light); }
.cell.dark { background-color: var(--board-dark); }
.cell.highlight-hint { animation: pulse-border 1s infinite alternate; }

@keyframes pulse-border {
  0% { box-shadow: inset 0 0 0 3px #ffb703, 0 0 14px #ffb703; }
  100% { box-shadow: inset 0 0 0 4px #fff, 0 0 20px #ffb703; }
}

/* 棋子外观 */
.piece {
  width: 82%;
  height: 82%;
  border-radius: 50%;
  background: radial-gradient(circle at 35% 30%, #634b37, #24150b 85%);
  border: 2px solid #9e7956;
  box-shadow: 0 6px 12px rgba(0, 0, 0, 0.65), inset 0 2px 4px rgba(255, 255, 255, 0.3), inset 0 -3px 6px rgba(0, 0, 0, 0.6);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--accent-gold);
  font-size: calc(var(--cell-size) * 0.44);
  animation: pop-in 0.2s cubic-bezier(0.175, 0.885, 0.32, 1.275);
}

.piece::after {
  content: "♟";
  filter: drop-shadow(0 1px 3px rgba(0, 0, 0, 0.8));
}

@keyframes pop-in {
  0% { transform: scale(0.3); opacity: 0; }
  100% { transform: scale(1); opacity: 1; }
}

/* 右侧行指示栏 */
.row-indicators {
  display: flex;
  flex-direction: column;
  width: 68px;
  margin-left: 8px;
  gap: 4px;
}

.indicator-row {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: var(--cell-size);
  padding: 2px 8px;
  background: rgba(0, 0, 0, 0.25);
  border-radius: 6px;
  border: 1px solid rgba(255, 255, 255, 0.08);
  font-size: 0.84rem;
  transition: all 0.25s;
}

/* 侧边信息面板 */
.sidebar {
  flex: 1;
  min-width: 300px;
  max-width: 380px;
  display: flex;
  flex-direction: column;
  gap: 14px;
}

.card {
  background: var(--bg-card);
  border: 1px solid var(--bg-card-border);
  border-radius: 12px;
  padding: 18px;
  box-shadow: 0 6px 18px rgba(0, 0, 0, 0.35);
}

.card-title {
  font-size: 1.05rem;
  font-weight: 600;
  color: var(--accent-gold);
  margin-bottom: 12px;
  display: flex;
  align-items: center;
  gap: 8px;
}

.stats-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 10px;
}

.stat-item {
  background: rgba(0, 0, 0, 0.25);
  border-radius: 8px;
  padding: 10px;
  text-align: center;
  border: 1px solid rgba(255, 255, 255, 0.05);
}

.stat-value {
  font-size: 1.45rem;
  font-weight: 700;
  color: #fff;
  margin-top: 4px;
}

.stat-label {
  font-size: 0.8rem;
  color: var(--text-dim);
}

/* 控制按钮组 */
.btn-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 8px;
}

.btn {
  padding: 10px 12px;
  border-radius: 8px;
  border: none;
  font-size: 0.88rem;
  font-weight: 600;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 6px;
  transition: all 0.18s ease;
  user-select: none;
}

.btn-primary { background: var(--accent-gold); color: #2b2014; }
.btn-primary:hover:not(:disabled) {
  background: var(--accent-gold-hover);
  box-shadow: 0 4px 12px rgba(229, 179, 88, 0.35);
}

.btn-secondary {
  background: #4a3e33;
  color: var(--text-main);
  border: 1px solid #635345;
}

.btn-secondary:hover:not(:disabled) { background: #5c4d3f; color: #fff; }
.btn:disabled { opacity: 0.45; cursor: not-allowed; }
.btn-full { grid-column: span 2; }

/* 平板屏幕适配 (601px ~ 1024px) */
@media (min-width: 601px) and (max-width: 1024px) {
  .game-container { flex-direction: column; align-items: center; }
  .sidebar { width: 100%; max-width: 600px; }
}

/* 手机屏幕适配 (<= 600px) */
@media (max-width: 600px) {
  body { padding: 8px 4px; }
  h1 { font-size: 1.45rem; }
  .subtitle { font-size: 0.84rem; }
  .toolbar-top { gap: 8px; }
  .board-wrapper { padding: 6px 4px; border-width: 5px; border-radius: 8px; }
  .col-indicators { margin-left: 22px; margin-right: 48px; gap: 2px; margin-bottom: 4px; }
  .row-labels { width: 22px; font-size: 0.8rem; }
  .board-grid { gap: 2px; border-width: 2px; }
  .row-indicators { width: 48px; margin-left: 4px; gap: 2px; }
  .indicator-row { padding: 1px 3px; font-size: 0.72rem; }
  .indicator-col { padding: 2px 1px; font-size: 0.72rem; }
  .sidebar { max-width: 100%; }
}