/* ============================================
   安全小卫士 — 暴雨积水应急科普
   共享样式表 (暗色模式 · 卡片 · 动效)
   ============================================ */

/* ---------- CSS 自定义属性 (主题色) — 浅色模式 (默认) ---------- */
:root {
  --color-primary: #6c8cff;
  --color-primary-glow: rgba(108, 140, 255, 0.3);
  --color-accent: #ffb347;
  --color-success: #4ade80;
  --color-danger: #f87171;
  --color-warning: #fbbf24;

  --color-bg-start: #f5f7ff;
  --color-bg-mid: #eef1ff;
  --color-bg-end: #e8ecff;
  --color-card-bg: rgba(240, 242, 255, 0.7);
  --color-card-border: rgba(0, 0, 0, 0.08);
  --color-card-glow: rgba(108, 140, 255, 0.12);

  --color-text: #1a1a2e;
  --color-text-dim: #6b6b80;
  --color-text-bright: #1a1a2e;

  --color-body-bg: #ffffff;
  --color-navbar-border: rgba(0, 0, 0, 0.06);

  --radius-sm: 8px;
  --radius-md: 14px;
  --radius-lg: 20px;
  --shadow-card: 0 4px 24px rgba(0, 0, 0, 0.3);
  --transition: 0.25s cubic-bezier(0.4, 0, 0.2, 1);
}

/* ---------- 深色模式 ---------- */
body.dark-mode {
  --color-primary: #8ba3ff;
  --color-primary-glow: rgba(108, 140, 255, 0.25);
  --color-accent: #ffb347;
  --color-success: #4ade80;
  --color-danger: #f87171;
  --color-warning: #fbbf24;

  --color-bg-start: #0f0f23;
  --color-bg-mid: #151530;
  --color-bg-end: #1a1a3e;
  --color-card-bg: rgba(30, 30, 60, 0.85);
  --color-card-border: rgba(255, 255, 255, 0.08);
  --color-card-glow: rgba(108, 140, 255, 0.15);

  --color-text: #e8e8f0;
  --color-text-dim: #9a9ab0;
  --color-text-bright: #ffffff;

  --color-body-bg: #0f0f23;
  --color-navbar-border: rgba(255, 255, 255, 0.06);

  --shadow-card: 0 4px 24px rgba(0, 0, 0, 0.5);
}

/* ---------- 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, "PingFang SC",
               "Microsoft YaHei", "Noto Sans SC", sans-serif;
  background: var(--color-body-bg);
  color: var(--color-text);
  min-height: 100vh;
  line-height: 1.6;
  padding: 0 16px 40px;
  transition: background var(--transition), color var(--transition);
}

/* ---------- 渐变标题 ---------- */
.gradient-title {
  font-size: clamp(1.6rem, 4vw, 2.6rem);
  font-weight: 800;
  background: linear-gradient(135deg, var(--color-primary), var(--color-accent));
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
  margin-bottom: 8px;
}

.subtitle {
  color: var(--color-text-dim);
  font-size: 0.95rem;
  margin-bottom: 24px;
}

/* ---------- 卡片 ---------- */
.card {
  background: var(--color-card-bg);
  border: 1px solid var(--color-card-border);
  border-radius: var(--radius-md);
  padding: 20px;
  box-shadow: var(--shadow-card);
  backdrop-filter: blur(6px);
  -webkit-backdrop-filter: blur(6px);
  transition: transform var(--transition), box-shadow var(--transition);
}

.card:hover {
  transform: translateY(-3px);
  box-shadow: 0 6px 30px var(--color-card-glow);
}

.card-hover {
  position: relative;
  overflow: hidden;
}
.card-hover::after {
  content: '';
  position: absolute;
  top: 0;
  left: -100%;
  width: 100%;
  height: 100%;
  background: linear-gradient(90deg, transparent, rgba(255,255,255,0.08), transparent);
  transition: left 0.6s ease;
  pointer-events: none;
}
.card-hover:hover::after {
  left: 100%;
}

.card-glow {
  border-color: var(--color-primary-glow);
  box-shadow: 0 0 20px var(--color-primary-glow);
}

/* ---------- 按钮 ---------- */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 6px;
  padding: 10px 22px;
  border: none;
  border-radius: var(--radius-sm);
  font-size: 0.95rem;
  font-weight: 600;
  cursor: pointer;
  transition: transform var(--transition), box-shadow var(--transition),
              background var(--transition);
  text-decoration: none;
  color: var(--color-text-bright);
}

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

.btn-primary {
  background: linear-gradient(135deg, var(--color-primary), #5a7ae6);
  box-shadow: 0 2px 12px var(--color-primary-glow);
}
.btn-primary:hover {
  transform: translateY(-2px);
  box-shadow: 0 4px 20px var(--color-primary-glow);
}

.btn-accent {
  background: linear-gradient(135deg, var(--color-accent), #e89f30);
  box-shadow: 0 2px 12px rgba(255, 179, 71, 0.3);
}
.btn-accent:hover {
  transform: translateY(-2px);
  box-shadow: 0 4px 20px rgba(255, 179, 71, 0.4);
}

.btn-danger {
  background: linear-gradient(135deg, var(--color-danger), #e05a5a);
  box-shadow: 0 2px 12px rgba(248, 113, 113, 0.3);
}

.btn-outline {
  background: transparent;
  border: 1.5px solid var(--color-primary);
  color: var(--color-primary);
}
.btn-outline:hover {
  background: var(--color-primary-glow);
}

/* ---------- 导航栏 ---------- */
.navbar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 10px;
  padding: 14px 0;
  margin-bottom: 28px;
  border-bottom: 1px solid rgba(0, 0, 0, 0.06);
}

.navbar-brand {
  font-size: 1.2rem;
  font-weight: 700;
  color: var(--color-text);
  text-decoration: none;
  display: flex;
  align-items: center;
  gap: 6px;
}

.navbar-links {
  display: flex;
  gap: 6px;
  flex-wrap: wrap;
}

.navbar-links a {
  color: var(--color-text-dim);
  text-decoration: none;
  padding: 6px 12px;
  border-radius: var(--radius-sm);
  font-size: 0.88rem;
  transition: background var(--transition), color var(--transition);
}
.navbar-links a:hover,
.navbar-links a.active {
  background: rgba(108, 140, 255, 0.1);
  color: var(--color-text);
}

/* ---------- 网格布局 ---------- */
.grid-2 {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 18px;
}

.grid-3 {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
  gap: 16px;
}

/* ---------- 徽章 / 标签 ---------- */
.badge {
  display: inline-block;
  padding: 3px 10px;
  border-radius: 20px;
  font-size: 0.78rem;
  font-weight: 600;
}

.badge-red { background: rgba(248, 113, 113, 0.2); color: var(--color-danger); }
.badge-orange { background: rgba(251, 191, 36, 0.2); color: var(--color-warning); }
.badge-yellow { background: rgba(251, 191, 36, 0.15); color: #facc15; }
.badge-blue { background: rgba(108, 140, 255, 0.2); color: var(--color-primary); }
.badge-green { background: rgba(74, 222, 128, 0.2); color: var(--color-success); }

/* ---------- 进度条 ---------- */
.progress-bar {
  width: 100%;
  height: 8px;
  background: rgba(0, 0, 0, 0.06);
  border-radius: 10px;
  overflow: hidden;
}
.progress-fill {
  height: 100%;
  border-radius: 10px;
  transition: width 0.5s ease;
}

/* ---------- 深色模式切换按钮 ---------- */
.theme-toggle {
  position: fixed;
  bottom: 20px;
  right: 20px;
  z-index: 999;
  width: 48px;
  height: 48px;
  border-radius: 50%;
  border: none;
  background: var(--color-card-bg);
  backdrop-filter: blur(8px);
  box-shadow: 0 2px 16px rgba(0,0,0,0.15);
  font-size: 1.4rem;
  cursor: pointer;
  transition: transform var(--transition), box-shadow var(--transition);
  display: flex;
  align-items: center;
  justify-content: center;
}
.theme-toggle:hover {
  transform: scale(1.1);
  box-shadow: 0 4px 24px rgba(0,0,0,0.2);
}

/* ---------- 撒花动画 ---------- */
@keyframes confettiFall {
  0% { transform: translateY(-10vh) rotate(0deg); opacity: 1; }
  100% { transform: translateY(110vh) rotate(720deg); opacity: 0; }
}
.confetti-piece {
  position: fixed;
  top: -10vh;
  width: 10px;
  height: 10px;
  border-radius: 2px;
  z-index: 1000;
  pointer-events: none;
  animation: confettiFall linear forwards;
}

/* ---------- 分享成绩弹窗 ---------- */
.share-modal-overlay {
  position: fixed;
  inset: 0;
  background: rgba(0,0,0,0.5);
  z-index: 998;
  display: flex;
  align-items: center;
  justify-content: center;
  animation: fadeIn 0.2s ease;
}
.share-modal {
  background: var(--color-card-bg);
  backdrop-filter: blur(12px);
  border: 1px solid var(--color-card-border);
  border-radius: var(--radius-lg);
  padding: 28px 24px;
  max-width: 340px;
  width: 90%;
  text-align: center;
  box-shadow: 0 8px 40px rgba(0,0,0,0.2);
}
.share-modal h3 { margin-bottom: 8px; }
.share-modal p { color: var(--color-text-dim); font-size: 0.88rem; margin-bottom: 16px; }
.share-modal .btn { margin: 4px; }
@keyframes fadeIn { from { opacity: 0; transform: scale(0.95); } to { opacity: 1; transform: scale(1); } }

/* ---------- 响应式 ---------- */
@media (max-width: 600px) {
  body { padding: 0 12px 32px; }
  .navbar { flex-direction: column; align-items: flex-start; }
  .card { padding: 16px; }
}

/* ---------- 工具类 ---------- */
.text-center { text-align: center; }
.mt-8  { margin-top: 8px; }
.mt-16 { margin-top: 16px; }
.mt-24 { margin-top: 24px; }
.mb-16 { margin-bottom: 16px; }
.flex-center { display: flex; align-items: center; justify-content: center; gap: 8px; }
.gap-8  { gap: 8px; }
.gap-12 { gap: 12px; }