/* ========================================
   食品安全大冒险 — 共享样式表
   像素冒险闯关风 · 暗色主题
   ======================================== */

/* ----- CSS 自定义属性 (主题色) ----- */
:root {
  --color-bg-start: #0a0e17;
  --color-bg-end: #1a1f2e;
  --color-surface: #1e2335;
  --color-surface-light: #252b3d;
  --color-primary: #00e676;
  --color-primary-glow: #69f0ae;
  --color-gold: #ffd740;
  --color-danger: #ff5252;
  --color-danger-glow: #ff8a80;
  --color-text: #e0e0e0;
  --color-text-dim: #9e9e9e;
  --color-text-bright: #ffffff;
  --color-border: #3a4055;
  --color-border-active: #00e676;
  --color-overlay: rgba(0, 0, 0, 0.7);

  --font-pixel: 'Courier New', 'SimHei', monospace;
  --font-body: -apple-system, BlinkMacSystemFont, 'PingFang SC',
    'Microsoft YaHei', 'Segoe UI', sans-serif;

  --radius-sm: 6px;
  --radius-md: 12px;
  --radius-lg: 20px;
  --shadow-card: 0 4px 24px rgba(0, 0, 0, 0.4);
  --shadow-glow: 0 0 16px rgba(0, 230, 118, 0.3);
  --transition-fast: 0.15s ease;
  --transition-normal: 0.25s ease;
}

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

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

body {
  font-family: var(--font-body);
  background: linear-gradient(160deg, var(--color-bg-start) 0%, var(--color-bg-end) 100%);
  color: var(--color-text);
  min-height: 100vh;
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
}

/* ----- 语义化布局 ----- */
header {
  background: var(--color-surface);
  border-bottom: 2px solid var(--color-border);
  padding: 14px 20px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 10px;
  position: sticky;
  top: 0;
  z-index: 100;
}

header .logo {
  font-family: var(--font-pixel);
  font-size: 1.3rem;
  font-weight: 700;
  color: var(--color-primary);
  text-shadow: 0 0 8px var(--color-primary-glow);
  letter-spacing: 2px;
}

nav {
  display: flex;
  gap: 8px;
  flex-wrap: wrap;
}

nav a {
  color: var(--color-text-dim);
  text-decoration: none;
  font-size: 0.9rem;
  padding: 6px 14px;
  border-radius: var(--radius-sm);
  border: 1px solid transparent;
  transition: all var(--transition-fast);
}

nav a:hover,
nav a.active {
  color: var(--color-primary);
  border-color: var(--color-primary);
  background: rgba(0, 230, 118, 0.08);
}

main {
  max-width: 900px;
  margin: 0 auto;
  padding: 30px 20px 60px;
}

footer {
  text-align: center;
  padding: 20px;
  color: var(--color-text-dim);
  font-size: 0.8rem;
  border-top: 1px solid var(--color-border);
  margin-top: 40px;
}

/* ----- 卡片 ----- */
.card {
  background: var(--color-surface);
  border: 2px solid var(--color-border);
  border-radius: var(--radius-md);
  padding: 24px;
  box-shadow: var(--shadow-card);
  transition: transform var(--transition-normal), box-shadow var(--transition-normal);
}

.card:hover {
  transform: translateY(-3px);
  box-shadow: var(--shadow-card), var(--shadow-glow);
}

.card__title {
  font-family: var(--font-pixel);
  font-size: 1.2rem;
  color: var(--color-gold);
  margin-bottom: 10px;
  letter-spacing: 1px;
}

.card__body {
  color: var(--color-text-dim);
  font-size: 0.95rem;
}

/* ----- 按钮 ----- */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 6px;
  font-family: var(--font-pixel);
  font-size: 0.95rem;
  font-weight: 700;
  padding: 10px 22px;
  border: 2px solid var(--color-primary);
  border-radius: var(--radius-sm);
  background: transparent;
  color: var(--color-primary);
  cursor: pointer;
  text-decoration: none;
  letter-spacing: 1px;
  transition: all var(--transition-fast);
  user-select: none;
}

.btn:hover {
  background: var(--color-primary);
  color: var(--color-bg-start);
  box-shadow: var(--shadow-glow);
  transform: translateY(-2px);
}

.btn:active {
  transform: translateY(0);
  box-shadow: none;
}

.btn--danger {
  border-color: var(--color-danger);
  color: var(--color-danger);
}

.btn--danger:hover {
  background: var(--color-danger);
  color: #fff;
  box-shadow: 0 0 16px rgba(255, 82, 82, 0.4);
}

.btn--gold {
  border-color: var(--color-gold);
  color: var(--color-gold);
}

.btn--gold:hover {
  background: var(--color-gold);
  color: var(--color-bg-start);
  box-shadow: 0 0 16px rgba(255, 215, 64, 0.4);
}

.btn--lg {
  font-size: 1.15rem;
  padding: 14px 32px;
}

.btn--sm {
  font-size: 0.8rem;
  padding: 6px 14px;
}

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

/* ----- 渐变标题 ----- */
.gradient-title {
  font-family: var(--font-pixel);
  font-size: 2rem;
  font-weight: 900;
  letter-spacing: 3px;
  text-align: center;
  background: linear-gradient(135deg, var(--color-primary) 0%, var(--color-gold) 100%);
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
  margin-bottom: 8px;
}

.gradient-title--sm {
  font-size: 1.4rem;
  letter-spacing: 2px;
}

/* ----- 进度条 ----- */
.progress-bar {
  width: 100%;
  height: 12px;
  background: var(--color-surface-light);
  border-radius: 6px;
  border: 1px solid var(--color-border);
  overflow: hidden;
}

.progress-bar__fill {
  height: 100%;
  background: linear-gradient(90deg, var(--color-primary), var(--color-gold));
  border-radius: 6px;
  transition: width 0.4s ease;
}

/* ----- 生命值 ----- */
.hearts {
  display: flex;
  gap: 4px;
  font-size: 1.4rem;
}

.hearts .heart {
  transition: transform var(--transition-fast), opacity var(--transition-fast);
}

.hearts .heart--lost {
  opacity: 0.2;
  transform: scale(0.7);
}

/* ----- 分数显示 ----- */
.score-display {
  font-family: var(--font-pixel);
  font-size: 1.5rem;
  color: var(--color-gold);
  text-shadow: 0 0 8px rgba(255, 215, 64, 0.4);
}

/* ----- 网格布局 ----- */
.grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(240px, 1fr));
  gap: 20px;
}

.grid--3col {
  grid-template-columns: repeat(auto-fill, minmax(200px, 1fr));
}

/* ----- 弹窗 / 提示 ----- */
.toast {
  position: fixed;
  top: 20px;
  left: 50%;
  transform: translateX(-50%);
  background: var(--color-surface);
  border: 2px solid var(--color-primary);
  border-radius: var(--radius-md);
  padding: 12px 24px;
  font-family: var(--font-pixel);
  color: var(--color-primary);
  z-index: 999;
  animation: toastIn 0.3s ease, toastOut 0.3s ease 2s forwards;
  box-shadow: var(--shadow-glow);
}

.toast--error {
  border-color: var(--color-danger);
  color: var(--color-danger);
}

@keyframes toastIn {
  from { opacity: 0; transform: translateX(-50%) translateY(-20px); }
  to { opacity: 1; transform: translateX(-50%) translateY(0); }
}

@keyframes toastOut {
  from { opacity: 1; }
  to { opacity: 0; }
}

/* ----- 像素边框效果 ----- */
.pixel-border {
  border: 3px solid;
  border-image: repeating-linear-gradient(
      0deg,
      var(--color-primary),
      var(--color-primary) 2px,
      transparent 2px,
      transparent 4px
    )
    3;
}

/* ----- 图鉴卡片 ----- */
.collection-card {
  background: var(--color-surface);
  border: 2px solid var(--color-border);
  border-radius: var(--radius-md);
  padding: 20px;
  text-align: center;
  transition: all var(--transition-normal);
  position: relative;
  overflow: hidden;
}

.collection-card--locked {
  filter: grayscale(1);
  opacity: 0.4;
}

.collection-card--unlocked {
  border-color: var(--color-gold);
  box-shadow: 0 0 12px rgba(255, 215, 64, 0.2);
}

.collection-card__icon {
  font-size: 3rem;
  margin-bottom: 8px;
}

.collection-card__name {
  font-family: var(--font-pixel);
  font-size: 0.95rem;
  color: var(--color-text);
}

.collection-card--locked .collection-card__name {
  color: var(--color-text-dim);
}

/* ----- 成就徽章 ----- */
.badge {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  background: var(--color-surface-light);
  border: 2px solid var(--color-border);
  border-radius: 20px;
  padding: 8px 16px;
  font-family: var(--font-pixel);
  font-size: 0.85rem;
  color: var(--color-text-dim);
  transition: all var(--transition-normal);
}

.badge--earned {
  border-color: var(--color-gold);
  color: var(--color-gold);
  background: rgba(255, 215, 64, 0.08);
  box-shadow: 0 0 10px rgba(255, 215, 64, 0.15);
}

/* ----- 响应式 ----- */
@media (max-width: 600px) {
  header {
    flex-direction: column;
    align-items: flex-start;
  }

  .gradient-title {
    font-size: 1.5rem;
  }

  main {
    padding: 20px 12px 40px;
  }

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

  .btn--lg {
    font-size: 1rem;
    padding: 12px 24px;
  }
}

/* ----- 工具类 ----- */
.text-center { text-align: center; }
.mt-1 { margin-top: 8px; }
.mt-2 { margin-top: 16px; }
.mt-3 { margin-top: 24px; }
.mt-4 { margin-top: 32px; }
.mb-2 { margin-bottom: 16px; }
.mb-3 { margin-bottom: 24px; }
.hidden { display: none !important; }