/**
 * GUBO(HK) 貴金屬報價系統
 *
 * 現代化 CSS 架構 v2.0
 * =========================
 *
 * 特性：
 * - 增強色彩系統（金屬質感漸層）
 * - 互動特效（懸停、按壓、聚焦）
 * - 高級字體排版
 * - 流暢動畫
 */

/* ═══════════════════════════════════════════════════════════════
   1. CSS 變量 — 增強設計令牌
   ═══════════════════════════════════════════════════════════════ */

:root {
  /* === 奢華金屬色彩系統 === */

  /* 黃金 Gold — 琥珀暖金 */
  --gold-50:  #fffbeb;
  --gold-100: #fef3c7;
  --gold-200: #fde68a;
  --gold-300: #fcd34d;
  --gold-400: #fbbf24;
  --gold-500: #f59e0b;
  --gold-600: #d97706;
  --gold-700: #b45309;
  --gold-800: #92400e;
  --gold-900: #78350f;

  /* 白銀 Silver — 石墨銀 */
  --silver-50:  #f8fafc;
  --silver-100: #f1f5f9;
  --silver-200: #e2e8f0;
  --silver-300: #cbd5e1;
  --silver-400: #94a3b8;
  --silver-500: #64748b;
  --silver-600: #475569;
  --silver-700: #334155;

  /* 鉑金 Platinum — 皇家藍 */
  --platinum-50:  #eff6ff;
  --platinum-100: #dbeafe;
  --platinum-200: #bfdbfe;
  --platinum-300: #93c5fd;
  --platinum-400: #60a5fa;
  --platinum-500: #3b82f6;
  --platinum-600: #2563eb;
  --platinum-700: #1d4ed8;

  /* 鈀金 Palladium — 紫羅蘭 */
  --palladium-50:  #f5f3ff;
  --palladium-100: #ede9fe;
  --palladium-200: #ddd6fe;
  --palladium-300: #c4b5fd;
  --palladium-400: #a78bfa;
  --palladium-500: #8b5cf6;
  --palladium-600: #7c3aed;
  --palladium-700: #6d28d9;

  /* === 增強狀態色彩 === */
  --up: #047857;
  --up-light: #10b981;
  --up-bg: #ecfdf5;
  --up-border: #a7f3d0;
  --down: #b91c1c;
  --down-light: #ef4444;
  --down-bg: #fef2f2;
  --down-border: #fecaca;

  /* === 精緻文字色彩 === */
  --text-primary:   #111827;
  --text-secondary: #374151;
  --text-tertiary:  #6b7280;
  --text-muted:     #9ca3af;

  /* === 溫暖背景層次 === */
  --bg-base: #fafaf9;
  --bg-primary: #f5f5f4;
  --bg-secondary: #e7e5e4;
  --bg-card: #ffffff;

  /* === 細膩邊框 === */
  --border-subtle: #e5e7eb;
  --border-light: #d1d5db;
  --border-medium: #9ca3af;

  /* === 高級陰影系統 === */
  --shadow-xs: 0 1px 2px rgba(0,0,0,0.04);
  --shadow-sm: 0 2px 4px rgba(0,0,0,0.04), 0 1px 2px rgba(0,0,0,0.03);
  --shadow-md: 0 4px 12px rgba(0,0,0,0.06), 0 2px 4px rgba(0,0,0,0.04);
  --shadow-lg: 0 12px 28px rgba(0,0,0,0.08), 0 4px 8px rgba(0,0,0,0.04);
  --shadow-xl: 0 24px 48px rgba(0,0,0,0.10), 0 8px 16px rgba(0,0,0,0.06);
  --shadow-inner: inset 0 2px 4px rgba(0,0,0,0.04);

  /* === 金屬發光效果 === */
  --glow-gold:      0 8px 32px rgba(245, 158, 11, 0.25), 0 2px 8px rgba(245, 158, 11, 0.15);
  --glow-silver:    0 8px 32px rgba(100, 116, 139, 0.20), 0 2px 8px rgba(100, 116, 139, 0.12);
  --glow-platinum:  0 8px 32px rgba(59, 130, 246, 0.22), 0 2px 8px rgba(59, 130, 246, 0.14);
  --glow-palladium: 0 8px 32px rgba(139, 92, 246, 0.22), 0 2px 8px rgba(139, 92, 246, 0.14);

  /* === 間距系統 (4px base) === */
  --space-0: 0;
  --space-1: 0.25rem;   /* 4px */
  --space-2: 0.5rem;     /* 8px */
  --space-3: 0.75rem;    /* 12px */
  --space-4: 1rem;       /* 16px */
  --space-5: 1.25rem;    /* 20px */
  --space-6: 1.5rem;     /* 24px */
  --space-7: 1.75rem;    /* 28px */
  --space-8: 2rem;        /* 32px */
  --space-10: 2.5rem;    /* 40px */
  --space-12: 3rem;      /* 48px */
  --space-16: 4rem;      /* 64px */
  --space-20: 5rem;      /* 80px */

  /* === 圓角 === */
  --radius-sm: 6px;
  --radius-md: 10px;
  --radius-lg: 16px;
  --radius-xl: 24px;
  --radius-full: 9999px;

  /* === 過渡 === */
  --ease-out-expo: cubic-bezier(0.19, 1, 0.22, 1);
  --ease-out-back: cubic-bezier(0.34, 1.56, 0.64, 1);
  --ease-spring: cubic-bezier(0.5, 1.5, 0.75, 1);

  --transition-fast: 0.15s ease;
  --transition-base: 0.25s ease;
  --transition-slow: 0.4s var(--ease-out-expo);

  /* === 字體 === */
  --font-display: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
  --font-mono: 'JetBrains Mono', 'SF Mono', 'Fira Code', monospace;
  --font-body: 'Inter', 'Noto Sans TC', -apple-system, 'PingFang TC', 'Microsoft JhengHei', sans-serif;

  /* === 尺寸 === */
  --header-height: 72px;
  --container-max: 1440px;
}

/* ═══════════════════════════════════════════════════════════════
   2. 基礎重置 & 現代化
   ═══════════════════════════════════════════════════════════════ */

*, *::before, *::after {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

html {
  font-size: 16px;
  scroll-behavior: smooth;
  -webkit-text-size-adjust: 100%;
}

body {
  font-family: var(--font-body);
  font-size: 1rem;
  line-height: 1.6;
  color: var(--text-primary);
  background: var(--bg-base);
  min-height: 100vh;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  text-rendering: optimizeLegibility;
}

/* 選擇文字 */
::selection {
  background: var(--gold-200);
  color: var(--gold-900);
}

/* 自定義滾動條 */
::-webkit-scrollbar {
  width: 8px;
  height: 8px;
}

::-webkit-scrollbar-track {
  background: var(--bg-primary);
  border-radius: var(--radius-full);
}

::-webkit-scrollbar-thumb {
  background: var(--border-medium);
  border-radius: var(--radius-full);
}

::-webkit-scrollbar-thumb:hover {
  background: var(--text-tertiary);
}

/* ═══════════════════════════════════════════════════════════════
   3. 焦點樣式 — 無障礙
   ═══════════════════════════════════════════════════════════════ */

:focus {
  outline: none;
}

:focus-visible {
  outline: 2px solid var(--gold-500);
  outline-offset: 2px;
  border-radius: var(--radius-sm);
}

/* ═══════════════════════════════════════════════════════════════
   4. 佈局系統
   ═══════════════════════════════════════════════════════════════ */

.container {
  width: 100%;
  max-width: var(--container-max);
  margin: 0 auto;
  padding: 0 var(--space-6);
}

@media (min-width: 768px) {
  .container {
    padding: 0 var(--space-8);
  }
}

@media (min-width: 1280px) {
  .container {
    padding: 0 var(--space-10);
  }
}

/* ═══════════════════════════════════════════════════════════════
   5. Header
   ═══════════════════════════════════════════════════════════════ */

.header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  height: var(--header-height);
  background: rgba(255, 255, 255, 0.90);
  backdrop-filter: blur(24px) saturate(200%);
  -webkit-backdrop-filter: blur(24px) saturate(200%);
  border-bottom: 1px solid var(--border-subtle);
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0 var(--space-6);
  z-index: 1000;
  transition: all var(--transition-base);
}

.header::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 0;
  right: 0;
  height: 1px;
  background: linear-gradient(90deg,
    transparent 0%,
    var(--gold-400) 15%,
    var(--gold-500) 50%,
    var(--gold-400) 85%,
    transparent 100%
  );
  opacity: 0.5;
}

/* Logo */
.logo {
  display: flex;
  align-items: center;
  gap: var(--space-3);
}

.logo-icon {
  width: 44px;
  height: 44px;
  background: linear-gradient(135deg, var(--gold-500) 0%, var(--gold-400) 50%, var(--gold-600) 100%);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 20px;
  font-weight: 900;
  color: white;
  box-shadow:
    0 4px 16px rgba(245, 158, 11, 0.40),
    0 0 0 2px rgba(255, 255, 255, 0.9) inset,
    inset 0 -2px 4px rgba(0, 0, 0, 0.1),
    inset 0 2px 4px rgba(255, 255, 255, 0.3);
  transition: transform var(--transition-base) var(--ease-out-back);
}

.logo-icon:hover {
  transform: scale(1.05) rotate(-3deg);
}

.logo-text {
  font-size: 20px;
  font-weight: 800;
  background: linear-gradient(135deg, var(--gold-700), var(--gold-500), var(--gold-600));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  letter-spacing: -0.02em;
}

/* Header 狀態 */
.header-status {
  display: flex;
  align-items: center;
  gap: var(--space-2);
  font-size: 12px;
  color: var(--text-secondary);
  font-weight: 600;
}

.status-dot {
  width: 8px;
  height: 8px;
  background: var(--up-light);
  border-radius: 50%;
  animation: statusPulse 2s ease-in-out infinite;
}

@keyframes statusPulse {
  0%, 100% {
    box-shadow: 0 0 0 0 rgba(16, 185, 129, 0.5);
    opacity: 1;
  }
  50% {
    box-shadow: 0 0 0 8px rgba(16, 185, 129, 0);
    opacity: 0.85;
  }
}

/* 時鐘 */
#clock {
  font-family: var(--font-mono);
  font-size: 14px;
  font-weight: 600;
  color: var(--gold-700);
  background: linear-gradient(135deg, var(--gold-50) 0%, var(--gold-100) 100%);
  padding: var(--space-2) var(--space-4);
  border-radius: var(--radius-md);
  border: 1px solid var(--gold-200);
  letter-spacing: 0.02em;
  box-shadow: var(--shadow-xs);
}

/* 刷新按鈕 */
.refresh-btn {
  display: inline-flex;
  align-items: center;
  gap: var(--space-2);
  padding: var(--space-3) var(--space-5);
  font-size: 13px;
  font-weight: 700;
  color: white;
  background: linear-gradient(135deg, var(--gold-500) 0%, var(--gold-600) 100%);
  border: none;
  border-radius: var(--radius-md);
  cursor: pointer;
  transition: all var(--transition-base) var(--ease-out-back);
  box-shadow:
    0 2px 8px rgba(245, 158, 11, 0.3),
    inset 0 1px 0 rgba(255, 255, 255, 0.2);
  text-shadow: 0 1px 2px rgba(0, 0, 0, 0.1);
}

.refresh-btn:hover {
  transform: translateY(-2px) scale(1.02);
  box-shadow:
    0 6px 20px rgba(245, 158, 11, 0.4),
    inset 0 1px 0 rgba(255, 255, 255, 0.2);
}

.refresh-btn:active {
  transform: translateY(0) scale(0.98);
  box-shadow:
    0 2px 4px rgba(245, 158, 11, 0.3),
    inset 0 1px 0 rgba(255, 255, 255, 0.2);
}

.refresh-btn svg {
  width: 16px;
  height: 16px;
  transition: transform var(--transition-base);
}

.refresh-btn:hover svg {
  transform: rotate(180deg);
}

/* ═══════════════════════════════════════════════════════════════
   6. 主內容區
   ═══════════════════════════════════════════════════════════════ */

.main {
  padding-top: calc(var(--header-height) + var(--space-8));
  padding-bottom: var(--space-12);
  min-height: 100vh;
}

/* 卡片網格 */
.cards-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--space-6);
  margin-bottom: var(--space-8);
}

@media (min-width: 640px) {
  .cards-grid {
    grid-template-columns: repeat(2, 1fr);
    gap: var(--space-6);
  }
}

@media (min-width: 1024px) {
  .cards-grid {
    grid-template-columns: repeat(4, 1fr);
    gap: var(--space-7);
  }
}

/* ═══════════════════════════════════════════════════════════════
   7. 價格卡片 — 增強版
   ═══════════════════════════════════════════════════════════════ */

.price-card {
  position: relative;
  background: var(--bg-card);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-xl);
  padding: var(--space-6) var(--space-6) var(--space-7);
  overflow: hidden;
  box-shadow: var(--shadow-sm);
  transition:
    transform var(--transition-slow),
    box-shadow var(--transition-slow),
    border-color var(--transition-base);
  animation: cardEnter 0.6s var(--ease-out-expo) both;
}

.price-card:nth-child(1) { animation-delay: 0.05s; }
.price-card:nth-child(2) { animation-delay: 0.12s; }
.price-card:nth-child(3) { animation-delay: 0.19s; }
.price-card:nth-child(4) { animation-delay: 0.26s; }

@keyframes cardEnter {
  from {
    opacity: 0;
    transform: translateY(24px) scale(0.96);
  }
  to {
    opacity: 1;
    transform: translateY(0) scale(1);
  }
}

/* 卡片頂部漸層線 */
.price-card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 4px;
  background: var(--card-accent);
  transform: scaleX(0);
  transform-origin: left;
  transition: transform var(--transition-slow);
}

.price-card:hover {
  transform: translateY(-8px) scale(1.01);
  box-shadow: var(--shadow-xl);
  border-color: var(--card-accent);
}

.price-card:hover::before {
  transform: scaleX(1);
}

/* 金屬主題 */
.price-card.gold {
  --card-accent: var(--gold-400);
  --card-glow: var(--glow-gold);
  --card-bg: var(--gold-50);
}

.price-card.silver {
  --card-accent: var(--silver-400);
  --card-glow: var(--glow-silver);
  --card-bg: var(--silver-50);
}

.price-card.platinum {
  --card-accent: var(--platinum-400);
  --card-glow: var(--glow-platinum);
  --card-bg: var(--platinum-50);
}

.price-card.palladium {
  --card-accent: var(--palladium-400);
  --card-glow: var(--glow-palladium);
  --card-bg: var(--palladium-50);
}

.price-card:hover {
  box-shadow: var(--shadow-xl), var(--card-glow);
}

/* 背景圖標 */
.card-bg-icon {
  position: absolute;
  right: var(--space-4);
  top: var(--space-3);
  font-size: 56px;
  opacity: 0.05;
  pointer-events: none;
  transition: all var(--transition-slow);
  transform: rotate(-12deg);
}

.price-card:hover .card-bg-icon {
  opacity: 0.1;
  transform: rotate(-8deg) scale(1.1);
}

/* 卡片標題 */
.card-label {
  display: flex;
  align-items: center;
  gap: var(--space-2);
  font-size: 11px;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--text-tertiary);
  margin-bottom: var(--space-2);
}

.card-dot {
  width: 10px;
  height: 10px;
  border-radius: 50%;
  background: var(--card-accent);
  box-shadow: 0 0 12px var(--card-accent), 0 0 24px var(--card-accent);
  animation: dotGlow 2.5s ease-in-out infinite;
}

@keyframes dotGlow {
  0%, 100% { 
    opacity: 1;
    transform: scale(1);
  }
  50% { 
    opacity: 0.7;
    transform: scale(0.9);
  }
}

/* 價格顯示 */
.card-price-main {
  font-family: var(--font-mono);
  font-size: 2rem;
  font-weight: 800;
  color: var(--text-primary);
  line-height: 1.15;
  letter-spacing: -0.02em;
  margin-bottom: var(--space-1);
  transition: all var(--transition-fast);
}

.card-price-main.updating {
  animation: priceFlash 0.3s ease;
}

@keyframes priceFlash {
  0%, 100% { opacity: 1; }
  50% { opacity: 0.5; transform: scale(1.02); }
}

.card-price-sub {
  font-family: var(--font-mono);
  font-size: 1rem;
  font-weight: 600;
  color: var(--text-tertiary);
  margin-bottom: var(--space-3);
}

/* 數值動畫效果 */
.price-value {
  transition: color 0.3s ease, transform 0.2s ease;
}

.price-value.updating {
  animation: pricePulse 0.4s ease-out;
}

@keyframes pricePulse {
  0% { transform: scale(1); }
  50% { transform: scale(1.02); color: var(--gold-500); }
  100% { transform: scale(1); }
}

/* 漲跌指示器增強 */
.change-indicator {
  display: inline-flex;
  align-items: center;
  gap: 4px;
  padding: 2px 8px;
  border-radius: var(--radius-full);
  font-size: 11px;
  font-weight: 700;
}

.change-indicator.up {
  background: linear-gradient(135deg, var(--up-bg), #d1fae5);
  color: var(--up);
}

.change-indicator.down {
  background: linear-gradient(135deg, var(--down-bg), #fee2e2);
  color: var(--down);
}

.card-unit {
  display: flex;
  align-items: center;
  justify-content: space-between;
  font-size: 10px;
  color: var(--text-muted);
  text-transform: uppercase;
  letter-spacing: 0.05em;
  margin-bottom: var(--space-4);
  padding-left: var(--space-1);
  border-left: 2px solid var(--border-subtle);
}

/* 價格網格 */
.card-prices-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--space-4);
  margin-bottom: var(--space-5);
}

.card-price-item {
  background: var(--card-bg);
  padding: var(--space-3);
  border-radius: var(--radius-md);
  border: 1px solid transparent;
  transition: all var(--transition-base);
  position: relative;
  overflow: hidden;
}

.card-price-item::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 0;
  right: 0;
  height: 2px;
  background: var(--card-accent);
  transform: scaleX(0);
  transition: transform var(--transition-base);
}

.card-price-item:hover {
  border-color: var(--border-light);
  transform: translateY(-2px);
}

.card-price-item:hover::after {
  transform: scaleX(1);
}

.card-price-label {
  font-size: 9px;
  color: var(--text-muted);
  text-transform: uppercase;
  letter-spacing: 0.05em;
  margin-bottom: var(--space-1);
  font-weight: 600;
}

.card-price-value {
  font-family: var(--font-mono);
  font-size: 14px;
  font-weight: 700;
  color: var(--text-primary);
}

/* 漲跌徽章 */
.card-change {
  display: flex;
  align-items: center;
  gap: var(--space-4);
  margin-bottom: var(--space-5);
}

.badge {
  display: inline-flex;
  align-items: center;
  padding: var(--space-2) var(--space-3);
  font-family: var(--font-mono);
  font-size: 13px;
  font-weight: 700;
  border-radius: var(--radius-sm);
  transition: all var(--transition-fast);
}

.badge.up {
  background: var(--up-bg);
  color: var(--up);
  border: 1px solid var(--up-border);
}

.badge.down {
  background: var(--down-bg);
  color: var(--down);
  border: 1px solid var(--down-border);
}

.badge:hover {
  transform: scale(1.05);
}

/* 溢價指示標籤 */
.markup-badge {
  display: inline-flex;
  align-items: center;
  gap: var(--space-1);
  font-size: 10px;
  font-weight: 600;
  padding: 3px 8px;
  border-radius: var(--radius-full);
  background: var(--gold-100);
  color: var(--gold-700);
  border: 1px solid var(--gold-300);
  font-family: var(--font-mono);
}

.markup-badge.silver {
  background: var(--silver-100);
  color: var(--silver-700);
  border-color: var(--silver-300);
}

.markup-badge.platinum {
  background: var(--platinum-100);
  color: var(--platinum-700);
  border-color: var(--platinum-300);
}

.markup-badge.palladium {
  background: var(--palladium-100);
  color: var(--palladium-700);
  border-color: var(--palladium-300);
}

.card-change-abs {
  font-family: var(--font-mono);
  font-size: 13px;
  font-weight: 600;
}

/* Meta 信息 */
.card-meta {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--space-3);
  padding-top: var(--space-5);
  border-top: 1px solid var(--border-subtle);
}

.meta-item {
  font-size: 11px;
  color: var(--text-tertiary);
  font-weight: 500;
  transition: color var(--transition-fast);
}

.meta-item span {
  font-family: var(--font-mono);
  font-weight: 700;
  color: var(--text-primary);
  margin-left: var(--space-1);
}

.price-card:hover .meta-item {
  color: var(--text-secondary);
}

/* ═══════════════════════════════════════════════════════════════
   8. 金銀比卡片
   ═══════════════════════════════════════════════════════════════ */

.ratio-card {
  background: var(--bg-card);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-xl);
  padding: var(--space-7) var(--space-8);
  margin-bottom: var(--space-8);
  display: flex;
  align-items: center;
  gap: var(--space-10);
  flex-wrap: wrap;
  position: relative;
  overflow: hidden;
  box-shadow: var(--shadow-sm);
  animation: cardEnter 0.6s var(--ease-out-expo) 0.3s both;
}

.ratio-card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 3px;
  background: linear-gradient(90deg, var(--gold-500), var(--silver-500), var(--platinum-500));
}

.ratio-card:hover {
  transform: translateY(-3px);
  box-shadow: var(--shadow-lg), var(--glow-gold);
  border-color: var(--gold-300);
}

.ratio-main {
  text-align: center;
  min-width: 140px;
}

.ratio-label {
  font-size: 10px;
  color: var(--text-muted);
  text-transform: uppercase;
  letter-spacing: 0.1em;
  margin-bottom: var(--space-2);
  font-weight: 700;
}

.ratio-value {
  font-family: var(--font-mono);
  font-size: 3rem;
  font-weight: 800;
  background: linear-gradient(135deg, var(--gold-600), var(--gold-400), var(--gold-500));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  line-height: 1;
  letter-spacing: -0.02em;
}

.ratio-sub {
  font-size: 10px;
  color: var(--text-muted);
  margin-top: var(--space-2);
  font-weight: 600;
}

.ratio-bar-wrap {
  flex: 1;
  min-width: 240px;
}

.ratio-bar-label {
  display: flex;
  justify-content: space-between;
  font-size: 10px;
  color: var(--text-tertiary);
  margin-bottom: var(--space-2);
  font-weight: 600;
}

.ratio-bar-track {
  height: 10px;
  background: linear-gradient(180deg, var(--bg-secondary), var(--bg-primary));
  border-radius: var(--radius-full);
  overflow: hidden;
  box-shadow: var(--shadow-inner);
}

.ratio-bar-fill {
  height: 100%;
  background: linear-gradient(90deg, var(--platinum-500), var(--silver-500), var(--gold-500));
  border-radius: var(--radius-full);
  transition: width 0.8s var(--ease-out-expo);
  position: relative;
  overflow: hidden;
}

.ratio-bar-fill::after {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: linear-gradient(
    90deg,
    transparent 0%,
    rgba(255,255,255,0.4) 50%,
    transparent 100%
  );
  animation: shimmer 2.5s ease-in-out infinite;
}

@keyframes shimmer {
  0% { transform: translateX(-100%); }
  100% { transform: translateX(100%); }
}

.ratio-desc {
  font-size: 13px;
  color: var(--text-secondary);
  margin-top: var(--space-3);
  font-weight: 600;
  line-height: 1.6;
}

/* ═══════════════════════════════════════════════════════════════
   9. 圖表區域
   ═══════════════════════════════════════════════════════════════ */

.charts-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--space-6);
  margin-bottom: var(--space-8);
  animation: cardEnter 0.6s var(--ease-out-expo) 0.38s both;
}

@media (min-width: 768px) {
  .charts-grid {
    grid-template-columns: repeat(2, 1fr);
  }
}

.chart-card {
  background: var(--bg-card);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-xl);
  padding: var(--space-6);
  transition: all var(--transition-slow);
  box-shadow: var(--shadow-sm);
}

.chart-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-lg);
  border-color: var(--border-light);
}

.chart-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: var(--space-5);
}

.chart-title {
  display: flex;
  align-items: center;
  gap: var(--space-3);
  font-size: 16px;
  font-weight: 700;
  color: var(--text-primary);
}

.chart-dot {
  width: 12px;
  height: 12px;
  border-radius: 50%;
  box-shadow: 0 0 10px currentColor;
}

.chart-dot.gold { background: var(--gold-500); color: var(--gold-500); }
.chart-dot.silver { background: var(--silver-500); color: var(--silver-500); }

.chart-wrap {
  height: 280px;
  border-radius: var(--radius-lg);
  overflow: hidden;
  background: linear-gradient(180deg, var(--bg-base), var(--bg-primary));
}

/* ═══════════════════════════════════════════════════════════════
   10. 表格
   ═══════════════════════════════════════════════════════════════ */

.table-card {
  background: var(--bg-card);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-xl);
  padding: var(--space-6);
  overflow-x: auto;
  box-shadow: var(--shadow-sm);
  animation: cardEnter 0.6s var(--ease-out-expo) 0.46s both;
}

.table-card:hover {
  box-shadow: var(--shadow-md);
}

.section-title {
  font-size: 17px;
  font-weight: 700;
  color: var(--text-primary);
  margin-bottom: var(--space-5);
  display: flex;
  align-items: center;
  gap: var(--space-3);
}

.data-table {
  width: 100%;
  border-collapse: collapse;
  font-size: 13px;
}

.data-table th {
  text-align: left;
  padding: var(--space-4) var(--space-5);
  font-weight: 700;
  color: var(--text-secondary);
  font-size: 11px;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  border-bottom: 2px solid var(--gold-400);
  background: linear-gradient(180deg, var(--gold-50), #fef3c7);
}

/* 表格數值優化 */
.data-table td {
  padding: var(--space-4) var(--space-5);
  border-bottom: 1px solid var(--border-subtle);
  font-family: var(--font-mono);
  font-weight: 600;
  transition: background 0.2s ease;
}

.data-table tbody tr:hover td {
  background: var(--bg-base);
}

.data-table tbody tr:last-child td {
  border-bottom: none;
}

.data-table td {
  padding: var(--space-5);
  border-bottom: 1px solid var(--border-subtle);
  font-family: var(--font-mono);
  font-weight: 600;
  transition: background var(--transition-fast);
}

/* 斑馬條紋 */
.data-table tbody tr:nth-child(even) td {
  background: var(--bg-primary);
}

.data-table tbody tr:hover td {
  background: var(--gold-50);
}

.data-table tr:last-child td {
  border-bottom: none;
}

td.highlight-twd {
  background: linear-gradient(135deg, var(--gold-500), var(--gold-400)) !important;
  color: white !important;
  font-weight: 800;
  border-radius: var(--radius-sm);
  text-shadow: 0 1px 2px rgba(0,0,0,0.15);
}

.up-text { color: var(--up) !important; }
.down-text { color: var(--down) !important; }

/* ═══════════════════════════════════════════════════════════════
   11. Footer
   ═══════════════════════════════════════════════════════════════ */

.footer {
  text-align: center;
  padding: var(--space-8);
  font-size: 13px;
  color: var(--text-tertiary);
  border-top: 1px solid var(--border-subtle);
  margin-top: var(--space-10);
  font-weight: 500;
}

/* ═══════════════════════════════════════════════════════════════
   12. 觸控設備優化
   ═══════════════════════════════════════════════════════════════ */

@media (hover: none) and (pointer: coarse) {
  .price-card:hover,
  .chart-card:hover,
  .ratio-card:hover {
    transform: none;
  }

  .btn,
  .badge {
    min-height: 44px;
    min-width: 44px;
  }
}

/* ═══════════════════════════════════════════════════════════════
   13. 減少動畫 — 無障礙
   ═══════════════════════════════════════════════════════════════ */

@media (prefers-reduced-motion: reduce) {
  *,
  *::before,
  *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
  }

  .ratio-bar-fill::after {
    animation: none;
  }
}

/* ═══════════════════════════════════════════════════════════════
   14. 工具類
   ═══════════════════════════════════════════════════════════════ */

.sr-only {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  white-space: nowrap;
  border: 0;
}

.text-up { color: var(--up); }
.text-down { color: var(--down); }
.text-muted { color: var(--text-muted); }
.text-gold { color: var(--gold-600); }
.text-center { text-align: center; }

.mb-4 { margin-bottom: var(--space-4); }
.mb-6 { margin-bottom: var(--space-6); }
.mt-4 { margin-top: var(--space-4); }
.mt-6 { margin-top: var(--space-6); }