/* ============================================
   食品安全卫士 — 共享样式表
   暗色暖调主题 · 卡片化 · 大字体 · 微动效
   ============================================ */

/* ----- CSS 自定义属性 (主题色) ----- */
:root {
  --color-bg: #1a1a2e;
  --color-bg-card: #222240;
  --color-bg-card-hover: #2a2a50;
  --color-primary: #f0a500;
  --color-primary-dark: #c78500;
  --color-accent: #e94560;
  --color-success: #2ecc71;
  --color-text: #e8e8e8;
  --color-text-dim: #b0b0b0;
  --color-text-heading: #ffffff;
  --color-border: #3a3a5c;
  --color-exp-bar-bg: #333355;
  --color-exp-bar-fill: linear-gradient(90deg, #f0a500, #e94560);
  --radius-sm: 8px;
  --radius-md: 14px;
  --radius-lg: 20px;
  --shadow-card: 0 4px 20px rgba(0,0,0,0.3);
  --shadow-hover: 0 8px 32px rgba(240,165,0,0.15);
  --font-stack: -apple-system, BlinkMacSystemFont, "PingFang SC", "Microsoft YaHei", "Noto Sans SC", sans-serif;
  --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: var(--font-stack);
  background: linear-gradient(135deg, #1a1a2e 0%, #16213e 50%, #0f3460 100%);
  color: var(--color-text);
  min-height: 100vh;
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
}

/* ----- 语义化布局 ----- */
header {
  padding: 16px 24px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 12px;
  border-bottom: 1px solid var(--color-border);
}

main {
  max-width: 900px;
  margin: 0 auto;
  padding: 24px 16px 48px;
}

footer {
  text-align: center;
  padding: 20px;
  color: var(--color-text-dim);
  font-size: 0.85rem;
  border-top: 1px solid var(--color-border);
}

/* ----- 导航 ----- */
nav a, .nav-link {
  color: var(--color-primary);
  text-decoration: none;
  font-weight: 600;
  font-size: 1rem;
  padding: 6px 14px;
  border-radius: var(--radius-sm);
  transition: background var(--transition-fast), color var(--transition-fast);
}

nav a:hover, .nav-link:hover {
  background: rgba(240,165,0,0.12);
  color: #ffc940;
}

/* ----- 卡片 ----- */
.card {
  background: var(--color-bg-card);
  border-radius: var(--radius-lg);
  padding: 24px;
  box-shadow: var(--shadow-card);
  border: 1px solid var(--color-border);
  transition: transform var(--transition-normal), box-shadow var(--transition-normal);
}

.card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-hover);
}

.card--interactive {
  cursor: pointer;
}

.card__title {
  font-size: 1.3rem;
  font-weight: 700;
  color: var(--color-text-heading);
  margin-bottom: 8px;
}

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

/* ----- 按钮 ----- */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 6px;
  padding: 10px 22px;
  font-size: 1rem;
  font-weight: 600;
  font-family: var(--font-stack);
  border: none;
  border-radius: var(--radius-md);
  cursor: pointer;
  transition: transform var(--transition-fast), box-shadow var(--transition-fast), filter var(--transition-fast);
  text-decoration: none;
  color: #1a1a2e;
}

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

.btn--primary {
  background: linear-gradient(135deg, #f0a500, #e07b00);
  color: #1a1a2e;
}

.btn--primary:hover {
  box-shadow: 0 4px 16px rgba(240,165,0,0.4);
  filter: brightness(1.08);
}

.btn--accent {
  background: linear-gradient(135deg, #e94560, #c23152);
  color: #fff;
}

.btn--accent:hover {
  box-shadow: 0 4px 16px rgba(233,69,96,0.4);
  filter: brightness(1.08);
}

.btn--outline {
  background: transparent;
  border: 2px solid var(--color-primary);
  color: var(--color-primary);
}

.btn--outline:hover {
  background: rgba(240,165,0,0.1);
}

.btn--sm {
  padding: 6px 14px;
  font-size: 0.9rem;
}

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

/* ----- 渐变标题 ----- */
.gradient-heading {
  background: linear-gradient(135deg, #f0a500 0%, #e94560 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  font-weight: 800;
}

/* ----- 经验条 ----- */
.exp-bar-wrapper {
  display: flex;
  align-items: center;
  gap: 10px;
}

.exp-bar {
  width: 140px;
  height: 14px;
  background: var(--color-exp-bar-bg);
  border-radius: 7px;
  overflow: hidden;
  position: relative;
}

.exp-bar__fill {
  height: 100%;
  background: linear-gradient(90deg, #f0a500, #e94560);
  border-radius: 7px;
  transition: width 0.6s cubic-bezier(0.4, 0, 0.2, 1);
}

.exp-bar__label {
  font-size: 0.85rem;
  font-weight: 700;
  color: var(--color-primary);
  white-space: nowrap;
}

/* ----- 关卡进度条（小圆点） ----- */
.level-progress {
  display: flex;
  align-items: center;
  gap: 6px;
  padding: 4px 10px;
  background: rgba(255,255,255,0.05);
  border-radius: var(--radius-sm);
}

.level-progress__dot {
  width: 10px;
  height: 10px;
  border-radius: 50%;
  background: var(--color-border);
  transition: background var(--transition-fast), box-shadow var(--transition-fast);
}

.level-progress__dot--done {
  background: var(--color-success);
  box-shadow: 0 0 6px rgba(46,204,113,0.5);
}

.level-progress__dot--current {
  background: var(--color-primary);
  box-shadow: 0 0 6px rgba(240,165,0,0.5);
  animation: pulse 1.5s ease-in-out infinite;
}

/* ----- 食品展示区 ----- */
.food-display {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 16px;
  padding: 24px;
  background: var(--color-bg-card);
  border-radius: var(--radius-lg);
  border: 2px dashed var(--color-border);
  margin-bottom: 20px;
}

.food-display__icon {
  font-size: 4rem;
}

.food-display__name {
  font-size: 1.4rem;
  font-weight: 700;
  color: var(--color-text-heading);
}

.food-display__info {
  font-size: 0.95rem;
  color: var(--color-text-dim);
  text-align: center;
  line-height: 1.7;
}

/* ----- 对话框区域 ----- */
.chat-area {
  display: flex;
  flex-direction: column;
  gap: 12px;
  margin-top: 16px;
}

.chat-bubble {
  max-width: 80%;
  padding: 12px 18px;
  border-radius: var(--radius-md);
  font-size: 1rem;
  line-height: 1.5;
  animation: fadeInUp 0.3s ease;
}

.chat-bubble--user {
  align-self: flex-end;
  background: var(--color-primary);
  color: #1a1a2e;
  border-bottom-right-radius: 4px;
}

.chat-bubble--ai {
  align-self: flex-start;
  background: var(--color-bg-card);
  border: 1px solid var(--color-border);
  border-bottom-left-radius: 4px;
}

.chat-input-row {
  display: flex;
  gap: 10px;
  margin-top: 8px;
}

.chat-input {
  flex: 1;
  padding: 10px 16px;
  font-size: 1rem;
  font-family: var(--font-stack);
  border: 2px solid var(--color-border);
  border-radius: var(--radius-md);
  background: var(--color-bg-card);
  color: var(--color-text);
  transition: border-color var(--transition-fast);
}

.chat-input:focus {
  outline: none;
  border-color: var(--color-primary);
}

.chat-input::placeholder {
  color: var(--color-text-dim);
}

/* ----- 撒花动画 ----- */
@keyframes confettiFall {
  0%   { transform: translateY(0) rotate(0deg); opacity: 1; }
  100% { transform: translateY(100vh) rotate(720deg); opacity: 0; }
}

/* ----- 关卡完成弹窗 ----- */
.modal-overlay {
  position: fixed;
  inset: 0;
  background: rgba(0,0,0,0.7);
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: 100;
  animation: fadeIn 0.3s ease;
}

.modal {
  background: var(--color-bg-card);
  border-radius: var(--radius-lg);
  padding: 32px;
  text-align: center;
  max-width: 400px;
  width: 90%;
  box-shadow: var(--shadow-hover);
  border: 1px solid var(--color-border);
}

.modal__icon {
  font-size: 3rem;
  margin-bottom: 12px;
}

.modal__title {
  font-size: 1.5rem;
  font-weight: 800;
  margin-bottom: 8px;
}

.modal__stars {
  font-size: 1.8rem;
  margin-bottom: 8px;
  letter-spacing: 4px;
}

.modal__exp {
  font-size: 1.1rem;
  color: var(--color-primary);
  margin-bottom: 20px;
}

.modal__actions {
  display: flex;
  flex-direction: column;
  gap: 10px;
  align-items: center;
}

/* ----- 首页关卡卡片网格 ----- */
.level-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(250px, 1fr));
  gap: 20px;
  margin-top: 24px;
}

.level-card {
  background: var(--color-bg-card);
  border-radius: var(--radius-lg);
  padding: 24px;
  border: 1px solid var(--color-border);
  text-decoration: none;
  color: var(--color-text);
  transition: transform var(--transition-normal), box-shadow var(--transition-normal);
  display: flex;
  flex-direction: column;
  gap: 10px;
}

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

.level-card__icon {
  font-size: 2.5rem;
}

.level-card__title {
  font-size: 1.2rem;
  font-weight: 700;
  color: var(--color-text-heading);
}

.level-card__desc {
  font-size: 0.9rem;
  color: var(--color-text-dim);
}

.level-card__badge {
  display: inline-block;
  padding: 4px 10px;
  border-radius: 12px;
  font-size: 0.8rem;
  font-weight: 700;
}

.level-card__badge--done {
  background: rgba(46,204,113,0.2);
  color: var(--color-success);
}

.level-card__badge--locked {
  background: rgba(176,176,176,0.15);
  color: var(--color-text-dim);
}

.level-card__badge--open {
  background: rgba(240,165,0,0.2);
  color: var(--color-primary);
}

/* ----- 关卡缩略图预览 ----- */
.level-card__preview {
  font-size: 0.8rem;
  color: var(--color-text-dim);
  padding: 6px 10px;
  background: rgba(255,255,255,0.04);
  border-radius: var(--radius-sm);
  margin-top: 4px;
  line-height: 1.4;
}

/* ----- 关卡进度条（小圆点） ----- */
.level-progress {
  display: flex;
  align-items: center;
  gap: 6px;
  padding: 4px 10px;
  background: rgba(255,255,255,0.05);
  border-radius: var(--radius-sm);
}

.level-progress__dot {
  width: 10px;
  height: 10px;
  border-radius: 50%;
  background: var(--color-border);
  transition: background var(--transition-fast), box-shadow var(--transition-fast);
}

.level-progress__dot--done {
  background: var(--color-success);
  box-shadow: 0 0 6px rgba(46,204,113,0.5);
}

.level-progress__dot--current {
  background: var(--color-primary);
  box-shadow: 0 0 6px rgba(240,165,0,0.5);
  animation: pulse 1.5s ease-in-out infinite;
}

/* ----- 提示/警告/成功消息 ----- */
.toast {
  position: fixed;
  top: 20px;
  left: 50%;
  transform: translateX(-50%);
  padding: 12px 24px;
  border-radius: var(--radius-md);
  font-weight: 600;
  font-size: 0.95rem;
  z-index: 200;
  animation: slideDown 0.3s ease;
  box-shadow: var(--shadow-card);
}

.toast--success {
  background: var(--color-success);
  color: #fff;
}

.toast--error {
  background: var(--color-accent);
  color: #fff;
}

.toast--info {
  background: var(--color-primary);
  color: #1a1a2e;
}

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

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

@keyframes slideDown {
  from { opacity: 0; transform: translateX(-50%) translateY(-16px); }
  to   { opacity: 1; transform: translateX(-50%) translateY(0); }
}

@keyframes pulse {
  0%, 100% { transform: scale(1); }
  50%      { transform: scale(1.05); }
}

/* ----- 选项按钮 ----- */
.option-btn {
  text-align: left;
  padding: 14px 20px;
  font-size: 1.05rem;
  border-radius: var(--radius-md);
  background: var(--color-bg-card);
  border: 2px solid var(--color-border);
  color: var(--color-text);
  cursor: pointer;
  transition: all var(--transition-fast);
  font-family: var(--font-stack);
}
.option-btn:hover {
  border-color: var(--color-primary);
  background: rgba(240,165,0,0.08);
  transform: translateX(4px);
}
.option-btn:disabled {
  opacity: 0.5;
  cursor: default;
  transform: none;
}
.option-btn:disabled:hover {
  border-color: var(--color-border);
  background: var(--color-bg-card);
  transform: none;
}

/* ----- 积分显示 ----- */
.coin-display {
  font-size: 1.1rem;
  font-weight: 700;
  color: var(--color-primary);
  background: rgba(240,165,0,0.12);
  padding: 6px 14px;
  border-radius: var(--radius-sm);
  white-space: nowrap;
}

.header-right {
  display: flex;
  align-items: center;
  gap: 10px;
}

/* ----- 商店网格 ----- */
.shop-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(200px, 1fr));
  gap: 16px;
}

.shop-card {
  background: var(--color-bg-card);
  border-radius: var(--radius-lg);
  padding: 20px;
  text-align: center;
  border: 1px solid var(--color-border);
  transition: transform var(--transition-normal), box-shadow var(--transition-normal);
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 8px;
}

.shop-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-hover);
}

.shop-card__icon {
  font-size: 2.5rem;
}

.shop-card__name {
  font-size: 1.1rem;
  font-weight: 700;
  color: var(--color-text-heading);
}

.shop-card__desc {
  font-size: 0.85rem;
  color: var(--color-text-dim);
}

.shop-card__price {
  font-size: 1rem;
  font-weight: 700;
  color: var(--color-primary);
}

/* ----- 背包网格 ----- */
.inventory-grid {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
}

.inventory-item {
  display: flex;
  align-items: center;
  gap: 8px;
  background: var(--color-bg-card);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  padding: 10px 16px;
}

.inventory-item__icon {
  font-size: 1.4rem;
}

.inventory-item__name {
  font-size: 0.95rem;
  font-weight: 600;
  color: var(--color-text);
}

.inventory-item__count {
  font-size: 0.9rem;
  font-weight: 700;
  color: var(--color-primary);
}

/* ----- 全屏奖状 ----- */
.certificate-overlay {
  position: fixed;
  inset: 0;
  background: rgba(0,0,0,0.85);
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: 999;
  animation: fadeIn 0.5s ease;
}
.certificate {
  background: linear-gradient(135deg, #1a1a2e, #2a1a3e);
  border: 4px solid #f0a500;
  border-radius: var(--radius-lg);
  padding: 48px 40px;
  text-align: center;
  max-width: 520px;
  width: 90%;
  box-shadow: 0 0 60px rgba(240,165,0,0.3);
  animation: certPop 0.6s cubic-bezier(0.34, 1.56, 0.64, 1);
}
@keyframes certPop {
  0% { transform: scale(0.5); opacity: 0; }
  100% { transform: scale(1); opacity: 1; }
}
.certificate__seal {
  font-size: 4rem;
  margin-bottom: 8px;
}
.certificate__title {
  font-size: 1.8rem;
  font-weight: 900;
  background: linear-gradient(135deg, #f0a500, #e94560);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  margin-bottom: 12px;
}
.certificate__sub {
  font-size: 1.1rem;
  color: var(--color-text-dim);
  margin-bottom: 20px;
  line-height: 1.6;
}
.certificate__stats {
  display: flex;
  justify-content: center;
  gap: 24px;
  margin-bottom: 24px;
}
.certificate__stat {
  text-align: center;
}
.certificate__stat-num {
  font-size: 1.6rem;
  font-weight: 800;
  color: var(--color-primary);
}
.certificate__stat-label {
  font-size: 0.85rem;
  color: var(--color-text-dim);
}
.certificate__footer {
  font-size: 0.9rem;
  color: var(--color-text-dim);
  border-top: 1px solid var(--color-border);
  padding-top: 16px;
  margin-top: 8px;
}

/* ----- 全屏奖状 ----- */
.certificate-overlay {
  position: fixed;
  inset: 0;
  background: rgba(0,0,0,0.85);
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: 999;
  animation: fadeIn 0.5s ease;
}
.certificate {
  background: linear-gradient(135deg, #1a1a2e, #2a1a3e);
  border: 4px solid #f0a500;
  border-radius: var(--radius-lg);
  padding: 48px 40px;
  text-align: center;
  max-width: 520px;
  width: 90%;
  box-shadow: 0 0 60px rgba(240,165,0,0.3);
  animation: certPop 0.6s cubic-bezier(0.34, 1.56, 0.64, 1);
}
@keyframes certPop {
  0% { transform: scale(0.5); opacity: 0; }
  100% { transform: scale(1); opacity: 1; }
}
.certificate__seal { font-size: 4rem; margin-bottom: 8px; }
.certificate__title {
  font-size: 1.8rem; font-weight: 900;
  background: linear-gradient(135deg, #f0a500, #e94560);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  margin-bottom: 12px;
}
.certificate__sub { font-size: 1.1rem; color: var(--color-text-dim); margin-bottom: 20px; line-height: 1.6; }
.certificate__stats { display: flex; justify-content: center; gap: 24px; margin-bottom: 24px; }
.certificate__stat { text-align: center; }
.certificate__stat-num { font-size: 1.6rem; font-weight: 800; color: var(--color-primary); }
.certificate__stat-label { font-size: 0.85rem; color: var(--color-text-dim); }
.certificate__footer { font-size: 0.9rem; color: var(--color-text-dim); border-top: 1px solid var(--color-border); padding-top: 16px; margin-top: 8px; }

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

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

  .chat-bubble {
    max-width: 90%;
  }

  .exp-bar {
    width: 100px;
  }

  main {
    padding: 16px 12px 32px;
  }
}