/* ============================================
   品牌主色：#ffe270 柠檬黄
   页面底色：#f8faf9 浅米白
   ============================================ */

:root {
  /* 品牌色 */
   --brand-primary: #ffe270;
  --brand-primary-dark: #e6c840;
  --brand-primary-light: #FFF9E6;
  --brand-primary-bg: #FFFBEC;

  /* 功能色 */
  --danger: #E74C3C;
  --warning: #F39C12;
  --success: #27AE60;
  --info: #3498DB;

  /* 营养素主题色 */
  --protein-color: #E74C3C;
  --carbs-color: #F39C12;
  --fat-color: #3498DB;
  --calorie-color: #ffe270;

  /* 文字 */
  --text-heading: #222222;
  --text-body: #333333;
  --text-secondary: #666666;
  --text-hint: #999999;
  --text-white: #FFFFFF;
  --text-on-primary: #FFFFFF;

  /* 背景 */
  --bg-page: #f8faf9;
  --bg-white: #FFFFFF;
  --bg-card: #FFFFFF;
  --bg-overlay: rgba(0, 0, 0, 0.5);
  --bg-camera: #000000;

  /* 圆角 */
  --radius-sm: 12rpx;
  --radius-md: 16rpx;
  --radius-lg: 20rpx;
  --radius-xl: 24rpx;
  --radius-full: 9999px;

  /* 阴影 */
  --shadow-sm: 0 2px 8px rgba(0, 0, 0, 0.04);
  --shadow-md: 0 4px 16px rgba(0, 0, 0, 0.08);
  --shadow-lg: 0 8px 32px rgba(0, 0, 0, 0.12);
  --shadow-card: 0 2px 12px rgba(0, 0, 0, 0.06);

  /* 字体 */
  --font-xs: 12px;
  --font-sm: 14px;
  --font-md: 16px;
  --font-lg: 20px;
  --font-xl: 24px;
  --font-xxl: 32px;
  --font-hero: 40px;

  /* 间距 */
  --spacing-xs: 8px;
  --spacing-sm: 12px;
  --spacing-md: 16px;
  --spacing-lg: 24px;
  --spacing-xl: 32px;
  --spacing-xxl: 40px;

  /* 安全区 */
  --safe-top: env(safe-area-inset-top, 0px);
  --safe-bottom: env(safe-area-inset-bottom, 0px);

  /* 转场 */
  --transition-fast: 0.15s ease;
  --transition-normal: 0.25s ease;
  --transition-slow: 0.35s ease;
}

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

html, body {
  width: 100%;
  height: 100%;
  font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', 'PingFang SC',
    'Hiragino Sans GB', 'Microsoft YaHei', sans-serif;
  font-size: var(--font-md);
  color: var(--text-body);
  background: var(--bg-page);
  line-height: 1.5;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  -webkit-tap-highlight-color: transparent;
  overflow-x: hidden;
  user-select: none;
}

button {
  border: none;
  outline: none;
  cursor: pointer;
  font-family: inherit;
  -webkit-tap-highlight-color: transparent;
}

input, select {
  font-family: inherit;
  outline: none;
  border: none;
  -webkit-appearance: none;
}

a { text-decoration: none; color: inherit; }

img { display: block; max-width: 100%; }

/* ---------- 通用布局 ---------- */
.page {
  position: fixed;
  top: 0; left: 0; right: 0; bottom: 0;
  background: var(--bg-page);
  overflow-y: auto;
  overflow-x: hidden;
  -webkit-overflow-scrolling: touch;
  display: none;
  flex-direction: column;
  z-index: 1;
}

.page.active {
  display: flex;
}

.page-content {
  flex: 1;
  padding: var(--spacing-lg);
  padding-bottom: calc(var(--spacing-xl) + var(--safe-bottom));
}

/* ---------- 按钮体系 ---------- */
.btn {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: var(--spacing-xs);
  font-size: var(--font-md);
  font-weight: 600;
  border-radius: 24px;
  padding: 14px 32px;
  transition: all var(--transition-fast);
  cursor: pointer;
}

.btn:active {
  transform: scale(0.97);
  opacity: 0.9;
}

.btn-primary {
  background: #FEE266;
  color: var(--text-heading);
  border: none;
}

.btn-primary:disabled {
  background: #FEF0B0;
  color: #999;
  cursor: not-allowed;
}

.btn-secondary {
  background: var(--bg-white);
  color: var(--brand-primary);
  border: 2px solid var(--brand-primary);
}

.btn-danger {
  background: var(--danger);
  color: var(--text-white);
}

.btn-block {
  width: 100%;
}

.btn-lg {
  padding: 16px 32px;
  font-size: var(--font-lg);
  border-radius: var(--radius-xl);
}

.btn-circle {
  width: 72px;
  height: 72px;
  border-radius: 50%;
  padding: 0;
}

/* ---------- 卡片 ---------- */
.card {
  background: var(--bg-white);
  border-radius: var(--radius-lg);
  padding: var(--spacing-lg);
  box-shadow: var(--shadow-card);
}

/* ---------- 输入框 ---------- */
.input {
  width: 100%;
  background: var(--bg-white);
  border: 2px solid transparent;
  border-radius: 24px;
  padding: 14px 16px;
  font-size: var(--font-md);
  color: var(--text-body);
  transition: border-color var(--transition-fast);
}

.input:focus {
  border-color: var(--brand-primary);
}

/* ---------- 工具类 ---------- */
.flex-row { display: flex; flex-direction: row; align-items: center; }
.flex-column { display: flex; flex-direction: column; }
.flex-between { display: flex; align-items: center; justify-content: space-between; }
.flex-center { display: flex; align-items: center; justify-content: center; }
.flex-1 { flex: 1; }
.flex-wrap { flex-wrap: wrap; }

.text-center { text-align: center; }
.text-right { text-align: right; }
.text-hint { color: var(--text-hint); font-size: var(--font-sm); }
.text-secondary { color: var(--text-secondary); }
.text-heading { color: var(--text-heading); }
.text-primary { color: var(--brand-primary); }
.text-danger { color: var(--danger); }

.font-xs { font-size: var(--font-xs); }
.font-sm { font-size: var(--font-sm); }
.font-md { font-size: var(--font-md); }
.font-lg { font-size: var(--font-lg); }
.font-xl { font-size: var(--font-xl); }
.font-xxl { font-size: var(--font-xxl); }
.font-hero { font-size: var(--font-hero); }

.fw-500 { font-weight: 500; }
.fw-600 { font-weight: 600; }
.fw-700 { font-weight: 700; }

.mt-xs { margin-top: var(--spacing-xs); }
.mt-sm { margin-top: var(--spacing-sm); }
.mt-md { margin-top: var(--spacing-md); }
.mt-lg { margin-top: var(--spacing-lg); }
.mt-xl { margin-top: var(--spacing-xl); }
.mb-xs { margin-bottom: var(--spacing-xs); }
.mb-sm { margin-bottom: var(--spacing-sm); }
.mb-md { margin-bottom: var(--spacing-md); }
.mb-lg { margin-bottom: var(--spacing-lg); }

.gap-xs { gap: var(--spacing-xs); }
.gap-sm { gap: var(--spacing-sm); }
.gap-md { gap: var(--spacing-md); }
.gap-lg { gap: var(--spacing-lg); }

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

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

@keyframes scaleIn {
  from { transform: scale(0.9); opacity: 0; }
  to { transform: scale(1); opacity: 1; }
}

@keyframes spin {
  to { transform: rotate(360deg); }
}

@keyframes pulse {
  0%, 100% { opacity: 1; }
  50% { opacity: 0.5; }
}

@keyframes slideUp {
  from { transform: translateY(100%); }
  to { transform: translateY(0); }
}

@keyframes slideDown {
  from { transform: translateY(0); }
  to { transform: translateY(100%); }
}

.fade-in { animation: fadeIn 0.3s ease forwards; }
.scale-in { animation: scaleIn 0.2s ease forwards; }

/* ---------- 登录Tab ---------- */
.login-tab {
  flex: 1; display: flex; justify-content: center; position: relative;
  font-size: 16px; font-weight: 600; color: var(--text-heading);
  cursor: pointer; transition: all 0.2s;
  padding: 10px 0 14px;
}
.login-tab::after {
  content: ''; position: absolute; bottom: 4px; left: 50%; transform: translateX(-50%);
  width: 2em; height: 3px; border-radius: 2px;
  background: transparent; transition: background .2s;
}
.login-tab.active::after {
  background: var(--brand-primary);
}

/* ---------- 确认弹窗 ---------- */
.confirm-overlay {
  position: fixed; inset: 0; background: rgba(0,0,0,0.5);
  display: flex; align-items: center; justify-content: center;
  z-index: 200;
}

/* ---------- 通用弹窗头部按钮 ---------- */
.pcal-btn-cancel {
  padding: 8px 12px; border: none; background: none;
  color: var(--text-hint); font-size: 14px; cursor: pointer;
  border-radius: 8px;
}
.pcal-btn-cancel:active { background: #f0f0f0; }

.pcal-btn-confirm {
  padding: 8px 20px; border: none;
  background: #1a1a1a; color: #fff; font-size: 14px;
  font-weight: 600; cursor: pointer; border-radius: 16px;
}
.pcal-btn-confirm:active { opacity: .8; }

/* ---------- 通用弹窗容器 ---------- */
.rm-overlay {
  position: fixed; top: 0; left: 0; right: 0; bottom: 0;
  background: rgba(0,0,0,0.4); z-index: 200;
  display: none; align-items: center; justify-content: center;
}
.rm-overlay[style*="display:flex"],
.rm-overlay[style*="display: flex"] { display: flex !important; }
.rm-sheet {
  width: calc(100% - 48px); max-width: 360px;
  background: var(--bg-white); border-radius: 20px;
  padding: 24px 20px 20px; position: relative;
}

/* ---------- 滚动条隐藏 ---------- */
.no-scrollbar::-webkit-scrollbar { display: none; }
.no-scrollbar { -ms-overflow-style: none; scrollbar-width: none; }