/* ============ 设计变量 ============ */
:root {
  --primary: #FF7A59;        /* 主色：温暖橙 */
  --primary-dark: #E85D3D;
  --primary-light: #FFF0EA;
  --green: #2E9E5B;
  --green-bg: #EAF6EF;
  --yellow: #D98A00;
  --yellow-bg: #FFF6E5;
  --red: #D64545;
  --red-bg: #FDECEC;
  --blue: #3B82C4;
  --blue-bg: #EDF5FC;

  --text: #2B2B2B;
  --text-secondary: #666;
  --border: #EBE4DF;
  --bg: #FDFBF8;
  --card: #FFFFFF;

  /* 无障碍：大字号体系 */
  --fs-xs: 14px;
  --fs-sm: 16px;
  --fs-md: 18px;
  --fs-lg: 21px;
  --fs-xl: 26px;

  --radius: 16px;
  --shadow: 0 2px 12px rgba(0,0,0,.06);
}

* { box-sizing: border-box; margin: 0; padding: 0; -webkit-tap-highlight-color: transparent; }

html { font-size: 16px; }

body {
  font-family: -apple-system, BlinkMacSystemFont, "PingFang SC", "Microsoft YaHei", "Segoe UI", sans-serif;
  background: var(--bg);
  color: var(--text);
  line-height: 1.65;
  font-size: var(--fs-md);
  -webkit-font-smoothing: antialiased;
}

a { color: var(--primary-dark); }
button { font-family: inherit; cursor: pointer; }

/* ============ 顶部 ============ */
.app-header {
  background: linear-gradient(135deg, #FF8A65, #FF6B4A);
  color: #fff;
  padding: 20px 20px 16px;
  position: sticky;
  top: 0;
  z-index: 50;
}
.app-header h1 {
  font-size: var(--fs-xl);
  font-weight: 700;
  letter-spacing: .5px;
}
.app-header .subtitle {
  font-size: var(--fs-sm);
  opacity: .92;
  margin-top: 2px;
}

/* ============ 阶段 Tab ============ */
.stage-tabs {
  display: flex;
  gap: 8px;
  padding: 12px 16px 0;
  overflow-x: auto;
  background: var(--bg);
  position: sticky;
  top: 96px;
  z-index: 40;
  scrollbar-width: none;
}
.stage-tabs::-webkit-scrollbar { display: none; }
.stage-tab {
  flex: 1 0 auto;
  min-width: 92px;
  padding: 12px 8px 10px;
  background: var(--card);
  border: 2px solid var(--border);
  border-radius: 14px;
  text-align: center;
  font-size: var(--fs-sm);
  font-weight: 600;
  color: var(--text-secondary);
  transition: all .15s;
  white-space: nowrap;
}
.stage-tab .emoji { display: block; font-size: 22px; margin-bottom: 2px; }
.stage-tab.active {
  background: var(--primary);
  border-color: var(--primary);
  color: #fff;
  box-shadow: var(--shadow);
}

/* ============ 通用容器 ============ */
.container { max-width: 720px; margin: 0 auto; padding: 16px; }
.section { margin-bottom: 22px; }
.section-title {
  font-size: var(--fs-lg);
  font-weight: 700;
  display: flex;
  align-items: center;
  gap: 8px;
  margin-bottom: 12px;
}

/* ============ 卡片 ============ */
.card {
  background: var(--card);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  padding: 16px;
  margin-bottom: 12px;
}

/* ============ 核心原则 ============ */
.headline-card {
  background: linear-gradient(135deg, #FFF4EC, #FFE8DC);
  border: 1px solid #FFD8C2;
  border-radius: var(--radius);
  padding: 16px;
  margin-bottom: 12px;
}
.headline-card .headline {
  font-size: var(--fs-lg);
  font-weight: 700;
  color: var(--primary-dark);
}
.headline-card .texture {
  margin-top: 6px;
  font-size: var(--fs-sm);
  color: var(--text-secondary);
}
.daily-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 8px;
  margin-bottom: 12px;
}
.daily-item {
  background: var(--blue-bg);
  border-radius: 12px;
  padding: 10px 12px;
  font-size: var(--fs-sm);
}
.daily-item b { color: var(--blue); }
.principle {
  background: var(--card);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  padding: 16px;
  margin-bottom: 12px;
}
.principle-head { display: flex; align-items: flex-start; gap: 10px; }
.principle-head .icon { font-size: 28px; flex-shrink: 0; }
.principle-head .title { font-weight: 700; font-size: var(--fs-md); }
.principle .text { margin-top: 6px; font-size: var(--fs-sm); }
.principle .why {
  margin-top: 10px;
  padding: 10px 12px;
  background: var(--green-bg);
  border-radius: 10px;
  font-size: var(--fs-sm);
  color: #1F6B3B;
}
.principle .why b { color: var(--green); }

/* ============ 搜索 ============ */
.search-bar {
  position: sticky;
  top: 148px;
  z-index: 39;
  background: var(--bg);
  padding: 8px 16px 12px;
}
.search-bar input {
  width: 100%;
  padding: 14px 16px;
  font-size: var(--fs-md);
  border: 2px solid var(--border);
  border-radius: 14px;
  outline: none;
  background: var(--card);
}
.search-bar input:focus { border-color: var(--primary); }

/* ============ 菜谱列表 ============ */
.recipe-card {
  background: var(--card);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  padding: 16px;
  margin-bottom: 12px;
  cursor: pointer;
  transition: transform .12s, box-shadow .12s;
}
.recipe-card:active { transform: scale(.99); }
.recipe-card-top { display: flex; align-items: center; gap: 12px; }
.recipe-emoji {
  width: 52px; height: 52px;
  border-radius: 14px;
  display: flex; align-items: center; justify-content: center;
  font-size: 28px;
  background: var(--primary-light);
  flex-shrink: 0;
}
.recipe-name { font-weight: 700; font-size: var(--fs-md); }
.recipe-meta { font-size: var(--fs-sm); color: var(--text-secondary); margin-top: 2px; }
.recipe-tags { display: flex; flex-wrap: wrap; gap: 6px; margin-top: 10px; }
.tag {
  font-size: var(--fs-xs);
  padding: 3px 10px;
  border-radius: 20px;
  font-weight: 500;
}
.tag-nutrient { background: var(--green-bg); color: var(--green); }
.tag-time { background: var(--blue-bg); color: var(--blue); }
.tag-allergen { background: var(--red-bg); color: var(--red); }
.tag-texture { background: var(--yellow-bg); color: var(--yellow); }

.empty-hint { text-align: center; color: var(--text-secondary); padding: 30px 0; font-size: var(--fs-sm); }

/* ============ 依据徽章（A/B/C/D/E） ============ */
.src-badge-row {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 5px;
  margin-top: 8px;
}
.src-badge {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  height: 16px;
  padding: 0 6px;
  border-radius: 8px;
  font-weight: 600;
  font-size: 10px;
  letter-spacing: .2px;
  line-height: 1;
  white-space: nowrap;
  cursor: help;
  background: #F3E8FD;
  color: #7C3AED;
  border: 1px solid transparent;
}
/* 每类来源专属配色 */
.src-A { background: #FDEBE3; color: #C2491B; border-color: #F6CDBB; }
.src-B { background: #E3F0FB; color: #1D6FA8; border-color: #C3DDF2; }
.src-C { background: #E5F5EC; color: #1E7A46; border-color: #C0E6CE; }
.src-D { background: #F3EBFC; color: #6D3BB5; border-color: #DDC9F5; }
.src-E { background: #FCEBE3; color: #B3471F; border-color: #F5CDB8; }

.src-card {
  background: #FBFAFC;
  border: 1px solid #EDE5F5;
  border-radius: 12px;
  padding: 12px 14px;
  margin-bottom: 10px;
}
.src-card-head {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: var(--fs-sm);
}
.src-card-head .src-badge { height: 18px; font-size: 11px; }
.src-card-head b { color: var(--text); }
.src-card-from {
  font-size: var(--fs-xs);
  color: var(--text-secondary);
  margin-top: 4px;
}
.src-card-points {
  list-style: none;
  margin-top: 8px;
}
.src-card-points li {
  position: relative;
  padding: 3px 0 3px 18px;
  font-size: var(--fs-sm);
  color: #4A4458;
}
.src-card-points li::before {
  content: "•";
  position: absolute;
  left: 4px;
  color: #7C3AED;
  font-weight: 700;
}

/* ============ 每周菜单表 ============ */
.meal-table {
  border-radius: var(--radius);
  overflow: hidden;
  box-shadow: var(--shadow);
  background: var(--card);
  margin-bottom: 14px;
}
.meal-table-head, .meal-row {
  display: grid;
  grid-template-columns: 44px repeat(auto-fit, minmax(0, 1fr));
}
.meal-table-head {
  background: var(--primary);
  color: #fff;
  font-weight: 700;
  font-size: var(--fs-sm);
}
.meal-col {
  padding: 10px 8px;
  border-right: 1px solid var(--border);
  border-bottom: 1px solid var(--border);
  font-size: var(--fs-sm);
  vertical-align: top;
}
.meal-table-head .meal-col { border-bottom: none; }
.meal-col:last-child { border-right: none; }
.meal-col.day-col {
  text-align: center;
  font-weight: 700;
  background: var(--primary-light);
  color: var(--primary-dark);
}
.meal-table-head .day-col { background: rgba(255,255,255,.2); color: #fff; }
.meal-row:nth-child(odd) .meal-col { background: #FDFBF9; }
.meal-dish { cursor: pointer; }
.meal-dish:hover { color: var(--primary-dark); }
.meal-dish .src-badge-row { margin-top: 4px; }

.snack-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 8px;
}
.snack-chip {
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 10px;
  font-size: var(--fs-sm);
  box-shadow: var(--shadow);
}
.snack-chip .src-badge-row { margin-top: 4px; }
.hint-text {
  text-align: center;
  color: var(--text-secondary);
  font-size: var(--fs-xs);
  margin-top: 12px;
}

/* ============ 食材选择 / 红黑榜 ============ */
.ingredient-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 10px; }
.ingredient-chip {
  background: var(--card);
  border: 2px solid var(--border);
  border-radius: 12px;
  padding: 10px;
  text-align: center;
  font-size: var(--fs-sm);
  cursor: pointer;
  transition: all .15s;
}
.ingredient-chip .emoji { font-size: 24px; display: block; }
.ingredient-chip.active {
  border-color: var(--primary);
  background: var(--primary-light);
  font-weight: 600;
}
.ingredient-chip.month-old { opacity: .5; }

.list-item {
  background: var(--card);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  padding: 14px;
  margin-bottom: 10px;
}
.list-item-head { display: flex; align-items: center; gap: 10px; }
.list-item-head .emoji { font-size: 24px; }
.list-item-head .name { font-weight: 700; font-size: var(--fs-md); flex: 1; }
.list-item .reason { margin-top: 8px; font-size: var(--fs-sm); }
.list-item .how {
  margin-top: 8px;
  padding: 8px 10px;
  background: var(--blue-bg);
  border-radius: 8px;
  font-size: var(--fs-sm);
}

.level-badge {
  font-size: var(--fs-xs);
  font-weight: 700;
  padding: 3px 10px;
  border-radius: 20px;
  white-space: nowrap;
}
.lv-green { background: var(--green-bg); color: var(--green); }
.lv-yellow { background: var(--yellow-bg); color: var(--yellow); }
.lv-red { background: var(--red-bg); color: var(--red); }

/* 红黑榜三段色区 */
.zone-title { font-size: var(--fs-md); font-weight: 700; margin: 14px 0 8px; display: flex; align-items: center; gap: 6px; }

/* ============ 安全原则页 ============ */
.safety-section {
  background: var(--card);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  padding: 16px;
  margin-bottom: 16px;
  border-left: 5px solid var(--green);
}
.safety-section.critical { border-left-color: var(--red); }
.safety-section-head { display: flex; align-items: center; gap: 10px; }
.safety-section-head .emoji { font-size: 28px; }
.safety-section-head .title { font-weight: 700; font-size: var(--fs-lg); }
.safety-section .intro { margin-top: 8px; font-size: var(--fs-sm); color: var(--text-secondary); }
.safety-item { margin-top: 12px; padding-top: 12px; border-top: 1px dashed var(--border); }
.safety-item .t { font-weight: 700; font-size: var(--fs-md); }
.safety-item .d { margin-top: 4px; font-size: var(--fs-sm); }

/* ============ 菜谱详情 ============ */
.recipe-detail { animation: fadeIn .25s; }
@keyframes fadeIn { from { opacity: 0; transform: translateY(8px);} to { opacity: 1; transform: none;} }
.detail-hero { text-align: center; padding: 8px 0 4px; }
.detail-hero .big-emoji { font-size: 64px; }
.detail-hero h2 { font-size: var(--fs-xl); margin-top: 4px; }
.detail-hero .meta { color: var(--text-secondary); font-size: var(--fs-sm); margin-top: 4px; }

.detail-block { margin-bottom: 18px; }
.detail-block-title {
  font-size: var(--fs-lg);
  font-weight: 700;
  display: flex; align-items: center; gap: 8px;
  margin-bottom: 10px;
  color: var(--primary-dark);
}
.why-text {
  background: var(--primary-light);
  border-radius: 12px;
  padding: 14px;
  font-size: var(--fs-sm);
}
.serving-box {
  display: grid; grid-template-columns: 1fr 1fr; gap: 10px;
}
.serving-box .box {
  background: var(--blue-bg);
  border-radius: 12px;
  padding: 12px;
  text-align: center;
}
.serving-box .box .label { font-size: var(--fs-xs); color: var(--text-secondary); }
.serving-box .box .value { font-size: var(--fs-md); font-weight: 700; margin-top: 2px; }

.ingredient-row {
  display: flex; justify-content: space-between; align-items: center;
  padding: 10px 0;
  border-bottom: 1px solid var(--border);
  font-size: var(--fs-md);
}
.ingredient-row .amount { color: var(--text-secondary); font-size: var(--fs-sm); }
.tool-row { display: flex; flex-wrap: wrap; gap: 8px; margin-top: 6px; }
.tool-chip { background: var(--bg); border: 1px solid var(--border); border-radius: 20px; padding: 6px 14px; font-size: var(--fs-sm); }

.step {
  display: flex; gap: 12px; margin-bottom: 14px;
}
.step-num {
  flex-shrink: 0;
  width: 34px; height: 34px;
  border-radius: 50%;
  background: var(--primary);
  color: #fff;
  display: flex; align-items: center; justify-content: center;
  font-weight: 700;
  font-size: var(--fs-md);
  margin-top: 2px;
}
.step-body { flex: 1; }
.step-text { font-size: var(--fs-md); }
.step-tip {
  margin-top: 4px;
  padding: 8px 10px;
  background: var(--yellow-bg);
  border-radius: 8px;
  font-size: var(--fs-sm);
  color: #7A5A00;
}

.caution-list { list-style: none; }
.caution-list li {
  position: relative;
  padding: 10px 12px 10px 36px;
  background: var(--red-bg);
  border-radius: 10px;
  margin-bottom: 8px;
  font-size: var(--fs-sm);
}
.caution-list li::before {
  content: "⚠️";
  position: absolute;
  left: 10px; top: 10px;
  font-size: 16px;
}

/* ============ 底部导航 ============ */
.bottom-nav {
  position: fixed;
  bottom: 0; left: 0; right: 0;
  background: var(--card);
  border-top: 1px solid var(--border);
  display: flex;
  z-index: 50;
  box-shadow: 0 -2px 12px rgba(0,0,0,.06);
}
.bottom-nav button {
  flex: 1;
  padding: 12px 4px 14px;
  background: none;
  border: none;
  font-size: var(--fs-xs);
  color: var(--text-secondary);
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 2px;
}
.bottom-nav button .emoji { font-size: 22px; }
.bottom-nav button.active { color: var(--primary); font-weight: 700; }

/* 底部留白，避免内容被导航遮挡 */
.page { padding-bottom: 80px; }

/* 返回按钮 */
.back-btn {
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 8px 16px;
  font-size: var(--fs-md);
  font-weight: 600;
  color: var(--text);
  margin-bottom: 12px;
}

/* ============ 免责声明 ============ */
.disclaimer {
  background: var(--yellow-bg);
  border-radius: 12px;
  padding: 12px 14px;
  font-size: var(--fs-xs);
  color: #7A5A00;
  line-height: 1.5;
}

/* ============ 响应式 ============ */
@media (min-width: 500px) {
  .ingredient-grid { grid-template-columns: repeat(3, 1fr); }
  .daily-grid { grid-template-columns: 1fr 1fr; }
}
@media (max-width: 375px) {
  html { font-size: 15px; }
}