/* ============================================
   陌生人搭讪小游戏 — 共享样式表
   水彩渲染 · 暗色模式 · 儿童友好
   ============================================ */

/* ---- CSS 自定义属性 (主题色) ---- */
:root {
  --color-primary: #a78bfa;       /* 主色 梦幻紫 */
  --color-secondary: #f472b6;     /* 辅色 粉红 */
  --color-accent: #34d399;        /* 强调色 翠绿 */
  --color-bg-start: #f5deb3;      /* 背景渐变起点 (肉黄) */
  --color-bg-end: #deb887;        /* 背景渐变终点 (深肉黄) */
  --color-card-bg: rgba(255, 255, 255, 0.55);
  --color-card-border: rgba(255, 255, 255, 0.4);
  --color-text: #1a3a3a;          /* 主文字 (深青, 浅色背景上清晰) */
  --color-text-secondary: #4a6a6a; /* 辅助文字 */
  --color-danger: #e07070;        /* 危险/错误 */
  --color-success: #5cb85c;       /* 成功/安全 */
  --radius-sm: 12px;
  --radius-md: 20px;
  --radius-lg: 28px;
  --shadow-card: 0 4px 20px rgba(0, 0, 0, 0.15);
  --transition: 0.25s ease;
  --font-stack: -apple-system, BlinkMacSystemFont, "PingFang SC",
    "Microsoft YaHei", "Noto Sans SC", sans-serif;
}

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

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

body {
  font-family: var(--font-stack);
  background: linear-gradient(145deg, var(--color-bg-start), var(--color-bg-end));
  color: var(--color-text);
  min-height: 100vh;
  line-height: 1.6;
  padding: 20px;
  -webkit-font-smoothing: antialiased;
}

/* ---- 水彩纹理叠加层 ---- */
body::before {
  content: '';
  position: fixed;
  inset: 0;
  pointer-events: none;
  z-index: 0;
  background:
    radial-gradient(circle at 20% 30%, rgba(108, 140, 213, 0.08) 0%, transparent 50%),
    radial-gradient(circle at 80% 70%, rgba(240, 168, 196, 0.06) 0%, transparent 50%),
    radial-gradient(circle at 50% 50%, rgba(245, 217, 140, 0.04) 0%, transparent 60%);
}

/* 所有内容在水彩层之上 */
header, main, footer, .container {
  position: relative;
  z-index: 1;
}

/* ---- 容器 ---- */
.container {
  max-width: 960px;
  margin: 0 auto;
  padding: 0 16px;
}

/* ---- 标题渐变文字 ---- */
h1, h2, h3 {
  font-weight: 700;
  line-height: 1.3;
}

.gradient-text {
  color: #2a7a7a;
  display: inline-block;
}

/* ---- 导航栏 ---- */
nav {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 12px;
  padding: 12px 0;
  margin-bottom: 24px;
  border-bottom: 1px solid rgba(0, 0, 0, 0.1);
}

nav .logo {
  font-size: 1.3rem;
  font-weight: 700;
  margin-right: auto;
}

nav a {
  color: var(--color-text-secondary);
  text-decoration: none;
  padding: 6px 14px;
  border-radius: var(--radius-sm);
  transition: var(--transition);
  font-size: 0.95rem;
}

nav a:hover {
  color: var(--color-text);
  background: rgba(255, 255, 255, 0.1);
}

/* ---- 卡片 ---- */
.card {
  display: block;
  background: var(--color-card-bg);
  backdrop-filter: blur(8px);
  -webkit-backdrop-filter: blur(8px);
  border: 1px solid var(--color-card-border);
  border-radius: var(--radius-md);
  padding: 24px;
  text-decoration: none;
  color: var(--color-text);
  transition: transform var(--transition), box-shadow var(--transition);
  box-shadow: var(--shadow-card);
}

.card:hover {
  transform: translateY(-4px) scale(1.01);
  box-shadow: 0 8px 30px rgba(0, 0, 0, 0.4);
  border-color: rgba(255, 255, 255, 0.25);
}

.card:active {
  transform: translateY(-1px) scale(0.99);
}

.card .emoji-icon {
  font-size: 2.4rem;
  display: block;
  margin-bottom: 10px;
}

.card h3 {
  font-size: 1.2rem;
  margin-bottom: 6px;
}

.card p {
  color: #c05070;
  font-size: 0.9rem;
  line-height: 1.5;
}

/* ---- 按钮 ---- */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 12px 28px;
  border: none;
  border-radius: var(--radius-sm);
  font-family: var(--font-stack);
  font-size: 1rem;
  font-weight: 600;
  cursor: pointer;
  transition: transform var(--transition), box-shadow var(--transition), background var(--transition);
  text-decoration: none;
}

.btn:hover {
  transform: translateY(-2px);
  box-shadow: 0 6px 20px rgba(0, 0, 0, 0.3);
}

.btn:active {
  transform: translateY(0);
}

.btn-primary {
  background: linear-gradient(135deg, var(--color-primary), #5a7bc0);
  color: #fff;
}

.btn-secondary {
  background: linear-gradient(135deg, var(--color-secondary), #d890b0);
  color: #fff;
}

.btn-accent {
  background: linear-gradient(135deg, var(--color-accent), #e0c070);
  color: #1a1a3e;
}

.btn-danger {
  background: linear-gradient(135deg, var(--color-danger), #c05050);
  color: #fff;
}

.btn-success {
  background: linear-gradient(135deg, var(--color-success), #50a070);
  color: #fff;
}

.btn:disabled {
  opacity: 0.5;
  cursor: not-allowed;
  transform: none !important;
}

/* ---- 场景卡片网格 ---- */
.card-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(260px, 1fr));
  gap: 20px;
  margin: 24px 0;
}

/* ---- 对话气泡 ---- */
.bubble {
  background: rgba(255, 255, 255, 0.1);
  border-radius: var(--radius-md);
  padding: 16px 20px;
  margin: 12px 0;
  border-left: 4px solid var(--color-primary);
  font-size: 1.05rem;
  line-height: 1.6;
}

.bubble.stranger {
  border-left-color: var(--color-danger);
}

.bubble.safe {
  border-left-color: var(--color-success);
}

.bubble.think {
  border-left-color: var(--color-accent);
}

/* ---- 选项按钮组 ---- */
.options {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin: 16px 0;
}

.options .btn {
  flex: 1;
  min-width: 120px;
}

/* ---- 反馈区域 ---- */
.feedback {
  padding: 16px 20px;
  border-radius: var(--radius-sm);
  margin: 16px 0;
  font-size: 1rem;
  line-height: 1.6;
  display: none;
}

.feedback.show {
  display: block;
  animation: fadeIn 0.4s ease;
}

.feedback.correct {
  background: rgba(180, 60, 100, 0.15);
  border: 1px solid #b04060;
  color: #b04060;
}

.feedback.wrong {
  background: rgba(180, 60, 100, 0.15);
  border: 1px solid #b04060;
  color: #b04060;
}

.feedback.info {
  background: rgba(108, 140, 213, 0.2);
  border: 1px solid var(--color-primary);
  color: #b0c8f0;
}

/* ---- 进度条 ---- */
.progress-bar {
  width: 100%;
  height: 8px;
  background: rgba(255, 255, 255, 0.1);
  border-radius: 4px;
  overflow: hidden;
  margin: 16px 0;
}

.progress-bar .fill {
  height: 100%;
  background: linear-gradient(90deg, var(--color-primary), var(--color-secondary));
  border-radius: 4px;
  transition: width 0.5s ease;
}

/* ---- 故事卡片 ---- */
.story-card {
  background: var(--color-card-bg);
  border: 1px solid var(--color-card-border);
  border-radius: var(--radius-md);
  padding: 24px;
  margin: 20px 0;
  box-shadow: var(--shadow-card);
}

.story-card .story-emoji {
  font-size: 3rem;
  text-align: center;
  display: block;
  margin-bottom: 12px;
}

/* ---- 返回首页链接 ---- */
.back-home {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  color: var(--color-text-secondary);
  text-decoration: none;
  font-size: 0.9rem;
  margin-bottom: 16px;
  transition: var(--transition);
}

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

/* ---- 页脚 ---- */
footer {
  text-align: center;
  padding: 32px 0 16px;
  color: var(--color-text-secondary);
  font-size: 0.85rem;
  border-top: 1px solid rgba(0, 0, 0, 0.1);
  margin-top: 48px;
}

/* ---- 动画 ---- */
@keyframes fadeIn {
  from { opacity: 0; transform: translateY(10px); }
  to   { opacity: 1; transform: translateY(0); }
}

@keyframes float {
  0%, 100% { transform: translateY(0); }
  50%      { transform: translateY(-6px); }
}

.fade-in {
  animation: fadeIn 0.5s ease;
}

.float {
  animation: float 3s ease-in-out infinite;
}

/* ---- 首页专用 ---- */
.home-page {
  display: flex;
  align-items: center;
  justify-content: center;
  min-height: 100vh;
  padding: 0;
  background: linear-gradient(145deg, #f5deb3, #deb887);
}

.home-container {
  text-align: center;
  max-width: 100%;
}

.home-main {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 24px;
  min-height: 80vh;
}

.home-title {
  font-size: 3.5rem !important;
  margin: 0 !important;
}

.home-subtitle {
  color: var(--color-text-secondary);
  font-size: 1.2rem;
  margin: 0;
}

.home-btn {
  font-size: 1.4rem !important;
  padding: 18px 48px !important;
  border-radius: 50px !important;
  box-shadow: 0 6px 24px rgba(91, 192, 190, 0.4);
  animation: float 3s ease-in-out infinite;
}

.home-btn:hover {
  box-shadow: 0 8px 32px rgba(91, 192, 190, 0.6);
}

.home-badges {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 12px;
  margin-top: 20px;
}

.home-badges span {
  background: rgba(255, 255, 255, 0.25);
  backdrop-filter: blur(4px);
  padding: 8px 16px;
  border-radius: 20px;
  font-size: 0.9rem;
  color: #2a7a7a;
  border: 1px solid rgba(255, 255, 255, 0.3);
  animation: fadeIn 0.6s ease both;
}

.home-badges span:nth-child(2) { animation-delay: 0.15s; }
.home-badges span:nth-child(3) { animation-delay: 0.3s; }
.home-badges span:nth-child(4) { animation-delay: 0.45s; }

/* ---- 响应式 ---- */
@media (max-width: 600px) {
  body {
    padding: 12px;
  }

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

  h1 {
    font-size: 1.5rem;
  }

  .options {
    flex-direction: column;
  }

  .options .btn {
    min-width: unset;
  }

  nav {
    gap: 8px;
  }

  nav .logo {
    font-size: 1.1rem;
  }
}