/* CSS Design System for Sokoban */
:root {
  --bg-primary: #121216;
  --bg-secondary: #1a1a22;
  --bg-card: rgba(255, 255, 255, 0.05);
  --bg-card-hover: rgba(255, 255, 255, 0.08);
  --border-color: rgba(255, 255, 255, 0.1);
  --accent-color: #3ca9ff;
  --accent-color-hover: #5cb7ff;
  --success-color: #2ecc71;
  --text-primary: #ffffff;
  --text-secondary: #b3b3c2;
  --font-family-title: 'Outfit', 'Inter', -apple-system, sans-serif;
  --font-family-body: 'Inter', -apple-system, sans-serif;
  --shadow-lg: 0 10px 30px -10px rgba(0, 0, 0, 0.5);
  --transition-smooth: all 0.25s cubic-bezier(0.4, 0, 0.2, 1);
}

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

body {
  background-color: var(--bg-primary);
  color: var(--text-primary);
  font-family: var(--font-family-body);
  height: 100vh;
  overflow: hidden;
  display: flex;
  justify-content: center;
  align-items: center;
}

/* 主游戏容器 */
.game-container {
  width: 100vw;
  height: 100vh;
  max-width: 1200px;
  max-height: 900px;
  display: flex;
  flex-direction: column;
  padding: 24px;
}

/* 顶部栏 */
.game-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 20px;
  padding-bottom: 15px;
  border-bottom: 1px solid var(--border-color);
}

.brand {
  display: flex;
  align-items: center;
  gap: 12px;
}

.brand h1 {
  font-family: var(--font-family-title);
  font-size: 26px;
  font-weight: 700;
  letter-spacing: -0.5px;
  background: linear-gradient(135deg, #fff 0%, var(--accent-color) 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
}

.badge {
  background: rgba(60, 169, 255, 0.15);
  color: var(--accent-color);
  padding: 4px 10px;
  border-radius: 20px;
  font-size: 12px;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 1px;
  border: 1px solid rgba(60, 169, 255, 0.3);
}

/* 关卡选择器 */
.level-selector-wrapper {
  display: flex;
  align-items: center;
  gap: 10px;
}

.select-container {
  position: relative;
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: 12px;
  overflow: hidden;
  transition: var(--transition-smooth);
}

.select-container:hover {
  border-color: rgba(60, 169, 255, 0.5);
  background: var(--bg-card-hover);
}

.select-container select {
  background: transparent;
  color: var(--text-primary);
  border: none;
  outline: none;
  font-family: var(--font-family-title);
  font-size: 15px;
  font-weight: 600;
  padding: 10px 35px 10px 15px;
  cursor: pointer;
  appearance: none;
  -webkit-appearance: none;
}

.select-container::after {
  content: '';
  position: absolute;
  right: 15px;
  top: 50%;
  transform: translateY(-50%);
  width: 0;
  height: 0;
  border-left: 5px solid transparent;
  border-right: 5px solid transparent;
  border-top: 5px solid var(--text-secondary);
  pointer-events: none;
}

/* 语言与主题选择器专用样式（紧凑型） */
.select-lang,
.select-theme {
  border-radius: 8px;
}

.select-lang select,
.select-theme select {
  font-size: 13px;
  padding: 6px 25px 6px 10px;
  font-weight: 500;
}

.select-lang::after,
.select-theme::after {
  right: 10px;
}

/* 按钮通用样式 */
.btn {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  color: var(--text-primary);
  padding: 10px;
  border-radius: 12px;
  cursor: pointer;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  font-family: var(--font-family-body);
  font-weight: 500;
  font-size: 14px;
  transition: var(--transition-smooth);
}

.btn-icon {
  width: 42px;
  height: 42px;
  border-radius: 12px;
  padding: 0;
}

.btn-icon svg {
  width: 24px;
  height: 24px;
  fill: var(--text-primary);
  transition: var(--transition-smooth);
}

.btn:hover:not(:disabled) {
  background: var(--bg-card-hover);
  border-color: rgba(255, 255, 255, 0.25);
  transform: translateY(-2px);
}

.btn-icon:hover svg {
  fill: var(--accent-color);
}

.btn:disabled {
  opacity: 0.4;
  cursor: not-allowed;
  transform: none;
}

.btn-primary {
  background: rgba(60, 169, 255, 0.1);
  border-color: rgba(60, 169, 255, 0.3);
  color: var(--accent-color);
}

.btn-primary svg {
  fill: var(--accent-color);
}

.btn-primary:hover:not(:disabled) {
  background: rgba(60, 169, 255, 0.2);
  border-color: var(--accent-color);
  color: #fff;
}

.btn-primary:hover svg {
  fill: #fff;
}

.btn-secondary {
  background: rgba(255, 255, 255, 0.02);
  border-color: var(--border-color);
  color: var(--text-secondary);
}

.btn-secondary svg {
  fill: var(--text-secondary);
}

.btn-secondary:hover:not(:disabled) {
  color: #fff;
  border-color: rgba(255, 255, 255, 0.3);
}

.btn-secondary:hover svg {
  fill: #fff;
}

.btn-flex {
  flex: 1;
}

.btn-large {
  padding: 14px 28px;
  font-size: 16px;
  font-weight: 600;
  border-radius: 14px;
}

.btn-success {
  background: var(--success-color);
  border-color: var(--success-color);
  color: #fff;
  font-weight: 600;
}

.btn-success:hover {
  background: #27ae60;
  border-color: #27ae60;
  box-shadow: 0 0 15px rgba(46, 204, 113, 0.4);
}

/* 游戏主体布局 */
.game-main {
  flex: 1;
  display: grid;
  grid-template-columns: 320px 1fr;
  gap: 24px;
  min-height: 0; /* 允许网格项缩小到其内容以下 */
}

/* 侧边面板 */
.sidebar-panel {
  background: var(--bg-secondary);
  border: 1px solid var(--border-color);
  border-radius: 24px;
  padding: 24px;
  display: flex;
  flex-direction: column;
  gap: 20px;
  overflow-y: auto;
  box-shadow: var(--shadow-lg);
}

.level-title-card {
  text-align: center;
  padding: 10px 0;
  border-bottom: 1px solid var(--border-color);
}

.level-title-card h2 {
  font-family: var(--font-family-title);
  font-size: 20px;
  font-weight: 700;
  margin-bottom: 4px;
}

.author-tag {
  font-size: 12px;
  color: var(--text-secondary);
  text-transform: uppercase;
  letter-spacing: 1px;
}

/* 属性卡片网格 */
.stats-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 10px;
}

.stat-card {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: 16px;
  padding: 12px 6px;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 6px;
}

.stat-label {
  font-size: 11px;
  color: var(--text-secondary);
  font-weight: 500;
}

.stat-value {
  font-family: var(--font-family-title);
  font-size: 18px;
  font-weight: 700;
  color: var(--accent-color);
}

/* 最佳记录卡 */
.best-scores-panel {
  background: rgba(255, 255, 255, 0.02);
  border: 1px dashed var(--border-color);
  border-radius: 16px;
  padding: 14px;
}

.best-scores-panel h3 {
  font-size: 12px;
  font-weight: 600;
  color: var(--text-secondary);
  margin-bottom: 8px;
  text-align: center;
  text-transform: uppercase;
  letter-spacing: 0.5px;
}

.best-row {
  display: flex;
  justify-content: space-around;
  font-size: 13px;
  color: var(--text-secondary);
}

.best-row strong {
  color: var(--text-primary);
}

/* 侧边操作栏 */
.control-panel {
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.control-row {
  display: flex;
  gap: 10px;
}

.control-row svg {
  width: 18px;
  height: 18px;
}

/* 提示指南 */
.instructions-panel h3 {
  font-size: 14px;
  font-weight: 600;
  margin-bottom: 10px;
  color: var(--text-secondary);
}

.help-list {
  list-style: none;
  font-size: 12px;
  color: var(--text-secondary);
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.help-list li {
  line-height: 1.6;
  position: relative;
  padding-left: 12px;
}

.help-list li::before {
  content: "•";
  position: absolute;
  left: 0;
  color: var(--accent-color);
}

.key-badge {
  background: #2a2a35;
  border: 1px solid #444455;
  color: #fff;
  padding: 2px 6px;
  border-radius: 4px;
  font-size: 11px;
  font-weight: 600;
  font-family: var(--font-family-title);
  box-shadow: 0 2px 0 #15151b;
  display: inline-block;
  margin: 0 2px;
}

/* 游戏画布区域 */
.game-board-container {
  background: var(--bg-secondary);
  border: 1px solid var(--border-color);
  border-radius: 24px;
  display: flex;
  flex-direction: column;
  justify-content: center;
  align-items: center;
  padding: 20px;
  position: relative;
  overflow: hidden;
  box-shadow: var(--shadow-lg);
  min-height: 0;
}

#game-board {
  width: 100%;
  height: 100%;
  display: flex;
  justify-content: center;
  align-items: center;
  max-width: 100%;
  max-height: 100%;
}

/* 游戏网格 SVG 样式 */
#game-board svg {
  box-shadow: 0 10px 30px rgba(0, 0, 0, 0.4);
  border-radius: 12px;
  max-width: 100%;
  max-height: 100%;
  display: block;
  transition: background-color 0.3s ease;
}

#game-board svg.sokoban-theme-classic {
  background-color: #ffffff; /* 经典版外部白色 */
}

#game-board svg.sokoban-theme-cyber {
  background-color: #080212; /* 赛博霓虹版外部深色背景 */
}

#game-board svg.sokoban-theme-wood {
  background-color: #e5dfd3; /* 森林木箱版外部米木色背景 */
}

/* 移动端虚拟方向盘 */
.mobile-dpad {
  display: none; /* 默认在桌面端隐藏 */
  position: absolute;
  bottom: 20px;
  right: 20px;
  z-index: 10;
  background: rgba(26, 26, 34, 0.85);
  backdrop-filter: blur(10px);
  -webkit-backdrop-filter: blur(10px);
  border: 1px solid var(--border-color);
  border-radius: 50%;
  padding: 10px;
  box-shadow: var(--shadow-lg);
}

.dpad-row {
  display: flex;
  justify-content: center;
  align-items: center;
}

.dpad-btn {
  width: 48px;
  height: 48px;
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: 12px;
  display: flex;
  justify-content: center;
  align-items: center;
  cursor: pointer;
  transition: var(--transition-smooth);
}

.dpad-btn svg {
  width: 24px;
  height: 24px;
  fill: var(--text-primary);
}

.dpad-btn:active {
  background: var(--accent-color);
  border-color: var(--accent-color);
  transform: scale(0.92);
}

.dpad-btn:active svg {
  fill: #fff;
}

.dpad-center {
  width: 48px;
  height: 48px;
  display: flex;
  justify-content: center;
  align-items: center;
}

.dpad-center-btn {
  width: 36px;
  height: 36px;
  background: rgba(255, 255, 255, 0.08);
  border: 1px solid var(--border-color);
  border-radius: 50%;
  display: flex;
  justify-content: center;
  align-items: center;
  cursor: pointer;
  transition: var(--transition-smooth);
}

.dpad-center-btn svg {
  width: 18px;
  height: 18px;
  fill: var(--text-secondary);
}

.dpad-center-btn:active {
  background: rgba(255, 255, 255, 0.2);
  transform: scale(0.9);
}

.dpad-center-btn:active svg {
  fill: #fff;
}

/* 弹出模态框 */
.modal-overlay {
  position: fixed;
  top: 0;
  left: 0;
  width: 100vw;
  height: 100vh;
  background: rgba(0, 0, 0, 0.85);
  backdrop-filter: blur(8px);
  -webkit-backdrop-filter: blur(8px);
  display: flex;
  justify-content: center;
  align-items: center;
  z-index: 100;
  opacity: 1;
  transition: opacity 0.3s ease;
}

.modal-overlay.hidden {
  opacity: 0;
  pointer-events: none;
}

.modal-content {
  background: var(--bg-secondary);
  border: 1px solid var(--border-color);
  border-radius: 28px;
  width: 90%;
  max-width: 460px;
  padding: 40px 30px;
  box-shadow: 0 20px 50px rgba(0, 0, 0, 0.6);
  text-align: center;
  transform: scale(1);
  transition: transform 0.3s cubic-bezier(0.34, 1.56, 0.64, 1);
}

.modal-overlay.hidden .modal-content {
  transform: scale(0.85);
}

.victory-icon {
  font-size: 54px;
  margin-bottom: 15px;
  display: inline-block;
  animation: bounce 1s infinite alternate;
}

.modal-header h2 {
  font-family: var(--font-family-title);
  font-size: 28px;
  font-weight: 800;
  margin-bottom: 6px;
  background: linear-gradient(135deg, #2ecc71 0%, #a3e4d7 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
}

.modal-header p {
  color: var(--text-secondary);
  font-size: 14px;
  font-weight: 600;
  letter-spacing: 0.5px;
  margin-bottom: 25px;
}

.victory-stats {
  display: flex;
  flex-direction: column;
  gap: 12px;
  margin-bottom: 30px;
}

.v-stat-card {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: 16px;
  padding: 12px 20px;
  display: flex;
  justify-content: space-between;
  align-items: center;
  position: relative;
}

.v-stat-label {
  font-size: 14px;
  color: var(--text-secondary);
}

.v-stat-value {
  font-family: var(--font-family-title);
  font-size: 20px;
  font-weight: 700;
  color: var(--accent-color);
}

.v-badge {
  position: absolute;
  top: -8px;
  right: 15px;
  background: var(--success-color);
  color: #fff;
  font-size: 10px;
  font-weight: 700;
  padding: 2px 6px;
  border-radius: 8px;
  box-shadow: 0 2px 5px rgba(46, 204, 113, 0.3);
}

.modal-footer {
  display: flex;
  gap: 15px;
}

.modal-footer button {
  flex: 1;
}

/* 隐藏实用工具类 */
.hidden {
  display: none !important;
}

/* 动效 */
@keyframes bounce {
  from { transform: translateY(0); }
  to { transform: translateY(-10px); }
}

/* 响应式媒体查询 */

/* 针对移动端 (折叠屏/常规手机) */
@media (max-width: 900px) {
  .game-container {
    height: 100vh;
    padding: 12px;
    max-height: none;
  }
  
  .game-header {
    margin-bottom: 12px;
    padding-bottom: 10px;
  }
  
  .brand h1 {
    font-size: 20px;
  }
  
  .game-main {
    grid-template-columns: 1fr;
    grid-template-rows: auto 1fr;
    gap: 12px;
  }
  
  .sidebar-panel {
    padding: 16px;
    border-radius: 20px;
    flex-direction: row;
    align-items: center;
    justify-content: space-between;
    flex-wrap: wrap;
    gap: 10px;
  }
  
  .level-title-card {
    text-align: left;
    border-bottom: none;
    padding: 0;
  }
  
  .level-title-card h2 {
    font-size: 18px;
  }
  
  .stats-grid {
    flex: 1;
    display: flex;
    gap: 8px;
    justify-content: flex-end;
  }
  
  .stat-card {
    padding: 8px 10px;
    border-radius: 12px;
  }
  
  .stat-value {
    font-size: 14px;
  }
  
  /* 手机端隐藏不必要的提示与桌面控制面板 */
  .control-panel,
  .instructions-panel,
  .best-scores-panel {
    display: none !important;
  }
  
  .game-board-container {
    border-radius: 20px;
    padding: 10px;
  }
  
  /* 显示移动端虚拟方向盘 */
  .mobile-dpad {
    display: block;
  }
}

/* 针对横屏或非常矮的屏幕 */
@media (max-height: 600px) and (min-width: 901px) {
  .game-container {
    padding: 10px;
  }
  .game-header {
    margin-bottom: 10px;
    padding-bottom: 5px;
  }
  .brand h1 {
    font-size: 22px;
  }
  .sidebar-panel {
    padding: 15px;
    gap: 10px;
  }
  .stats-grid {
    gap: 5px;
  }
  .stat-card {
    padding: 5px;
  }
}