/* ============================================================
   解压小游戏 — 共享样式
   暗色渐变 · 柔和发光 · 微动效 · 圆角卡片 · 低饱和配色
   ============================================================ */

/* --- CSS 自定义属性（主题色） --- */
:root {
  --color-bg-start: #0f0c29;
  --color-bg-mid: #302b63;
  --color-bg-end: #24243e;
  --color-primary: #a78bfa;
  --color-primary-light: #c4b5fd;
  --color-accent: #f472b6;
  --color-accent-light: #f9a8d4;
  --color-success: #34d399;
  --color-warning: #fbbf24;
  --color-text: #e2e8f0;
  --color-text-dim: #94a3b8;
  --color-card-bg: rgba(255, 255, 255, 0.06);
  --color-card-border: rgba(255, 255, 255, 0.1);
  --color-card-hover: rgba(255, 255, 255, 0.12);
  --radius-sm: 8px;
  --radius-md: 16px;
  --radius-lg: 24px;
  --shadow-glow: 0 0 20px rgba(167, 139, 250, 0.15);
  --transition-fast: 0.2s ease;
  --transition-normal: 0.3s ease;
}

/* --- 全局重置 --- */
*, *::before, *::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

html {
  font-size: 16px;
  scroll-behavior: smooth;
}

body {
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC",
    "Microsoft YaHei", "Helvetica Neue", sans-serif;
  background: linear-gradient(135deg, var(--color-bg-start), var(--color-bg-mid), var(--color-bg-end));
  background-attachment: fixed;
  color: var(--color-text);
  min-height: 100vh;
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
}

/* --- 渐变标题 --- */
.gradient-title {
  font-size: 2.2rem;
  font-weight: 800;
  background: linear-gradient(135deg, var(--color-primary-light), var(--color-accent));
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
  margin-bottom: 0.5rem;
}

.gradient-title-sm {
  font-size: 1.4rem;
  font-weight: 700;
  background: linear-gradient(135deg, var(--color-primary-light), var(--color-accent));
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
}

/* --- 导航栏 --- */
.nav-bar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 1rem 2rem;
  background: rgba(0, 0, 0, 0.3);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--color-card-border);
  position: sticky;
  top: 0;
  z-index: 100;
}

.nav-bar .logo {
  font-size: 1.2rem;
  font-weight: 700;
  color: var(--color-primary-light);
  text-decoration: none;
}

.nav-bar .nav-links {
  display: flex;
  gap: 1rem;
  list-style: none;
}

.nav-bar .nav-links a {
  color: var(--color-text-dim);
  text-decoration: none;
  font-size: 0.9rem;
  padding: 0.4rem 0.8rem;
  border-radius: var(--radius-sm);
  transition: color var(--transition-fast), background var(--transition-fast);
}

.nav-bar .nav-links a:hover {
  color: var(--color-text);
  background: var(--color-card-bg);
}

/* --- 返回首页链接 --- */
.back-home {
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
  color: var(--color-text-dim);
  text-decoration: none;
  font-size: 0.9rem;
  margin-bottom: 1rem;
  transition: color var(--transition-fast);
}

.back-home:hover {
  color: var(--color-primary-light);
}

/* --- 主容器 --- */
.container {
  max-width: 1100px;
  margin: 0 auto;
  padding: 2rem 1.5rem;
}

/* --- 卡片网格 --- */
.card-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
  gap: 1.5rem;
  margin-top: 2rem;
}

/* --- 卡片 --- */
.card {
  background: var(--color-card-bg);
  border: 1px solid var(--color-card-border);
  border-radius: var(--radius-md);
  padding: 1.8rem 1.5rem;
  text-align: center;
  text-decoration: none;
  color: var(--color-text);
  transition: transform var(--transition-normal), box-shadow var(--transition-normal),
    background var(--transition-normal);
  cursor: pointer;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 0.8rem;
}

.card:hover {
  transform: translateY(-6px);
  box-shadow: var(--shadow-glow);
  background: var(--color-card-hover);
}

.card:active {
  transform: translateY(-2px);
}

.card .card-icon {
  font-size: 3rem;
  line-height: 1;
}

.card .card-title {
  font-size: 1.2rem;
  font-weight: 700;
  color: var(--color-primary-light);
}

.card .card-desc {
  font-size: 0.9rem;
  color: var(--color-text-dim);
  line-height: 1.5;
}

/* --- 按钮 --- */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
  padding: 0.7rem 1.6rem;
  border: none;
  border-radius: var(--radius-sm);
  font-size: 1rem;
  font-weight: 600;
  cursor: pointer;
  transition: transform var(--transition-fast), box-shadow var(--transition-fast),
    background var(--transition-fast);
  text-decoration: none;
}

.btn-primary {
  background: linear-gradient(135deg, var(--color-primary), var(--color-accent));
  color: #fff;
}

.btn-primary:hover {
  transform: scale(1.04);
  box-shadow: 0 0 16px rgba(167, 139, 250, 0.4);
}

.btn-primary:active {
  transform: scale(0.97);
}

.btn-ghost {
  background: transparent;
  color: var(--color-text-dim);
  border: 1px solid var(--color-card-border);
}

.btn-ghost:hover {
  background: var(--color-card-bg);
  color: var(--color-text);
}

/* --- 游戏容器（子页面通用） --- */
.game-container {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 1.5rem;
  padding: 2rem 1rem;
}

.game-canvas-wrapper {
  background: rgba(0, 0, 0, 0.3);
  border-radius: var(--radius-md);
  padding: 1rem;
  border: 1px solid var(--color-card-border);
  box-shadow: var(--shadow-glow);
}

.game-canvas-wrapper canvas {
  display: block;
  border-radius: var(--radius-sm);
}

/* --- 游戏控制栏 --- */
.game-controls {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: center;
  gap: 0.8rem;
}

.game-stats {
  display: flex;
  gap: 1.5rem;
  font-size: 0.95rem;
  color: var(--color-text-dim);
}

.game-stats span {
  display: flex;
  align-items: center;
  gap: 0.3rem;
}

.game-stats .stat-value {
  color: var(--color-primary-light);
  font-weight: 700;
  font-size: 1.1rem;
}

/* --- 页脚 --- */
footer {
  text-align: center;
  padding: 2rem;
  color: var(--color-text-dim);
  font-size: 0.85rem;
  border-top: 1px solid var(--color-card-border);
  margin-top: 3rem;
}

/* --- 响应式 --- */
@media (max-width: 640px) {
  .nav-bar {
    flex-direction: column;
    gap: 0.6rem;
    padding: 0.8rem 1rem;
  }

  .gradient-title {
    font-size: 1.6rem;
  }

  .card-grid {
    grid-template-columns: 1fr;
  }

  .container {
    padding: 1.2rem 1rem;
  }

  .game-stats {
    flex-wrap: wrap;
    justify-content: center;
  }
}