/* ============================================
   OutdoorGearLab - Main Stylesheet
   ============================================ */

/* CSS Variables */
:root {
  --color-primary: #2d6a4f;
  --color-primary-dark: #1b4332;
  --color-primary-light: #52b788;
  --color-accent: #f4a261;
  --color-rab: #d62828;
  --color-patagonia: #457b9d;
  --color-text: #212529;
  --color-text-muted: #6c757d;
  --color-bg: #f8f9fa;
  --color-white: #ffffff;
  --color-border: #dee2e6;
  --color-surface: #ffffff;
  --shadow-sm: 0 1px 3px rgba(0,0,0,0.08);
  --shadow-md: 0 4px 12px rgba(0,0,0,0.10);
  --shadow-lg: 0 8px 24px rgba(0,0,0,0.12);
  --radius-sm: 6px;
  --radius-md: 12px;
  --radius-lg: 20px;
  --font-main: 'Noto Sans KR', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
  --transition: all 0.2s ease;
  --max-width: 1200px;
}

/* Reset */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; }
body {
  font-family: var(--font-main);
  font-size: 16px;
  line-height: 1.7;
  color: var(--color-text);
  background: var(--color-bg);
}
a { color: inherit; text-decoration: none; }
img { max-width: 100%; display: block; }
ul { list-style: none; }
button { cursor: pointer; border: none; background: none; font-family: inherit; }

/* Container */
.container {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 20px;
}

/* ============================================
   Typography
   ============================================ */
h1, h2, h3, h4 { line-height: 1.3; font-weight: 700; }
h1 { font-size: clamp(1.8rem, 4vw, 2.8rem); }
h2 { font-size: clamp(1.4rem, 3vw, 2rem); }
h3 { font-size: clamp(1.1rem, 2vw, 1.3rem); }

/* ============================================
   Buttons
   ============================================ */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 12px 28px;
  border-radius: var(--radius-md);
  font-size: 0.95rem;
  font-weight: 600;
  transition: var(--transition);
  cursor: pointer;
}
.btn-primary {
  background: var(--color-primary);
  color: var(--color-white);
  box-shadow: var(--shadow-md);
}
.btn-primary:hover {
  background: var(--color-primary-dark);
  transform: translateY(-2px);
  box-shadow: var(--shadow-lg);
}
.btn-outline {
  border: 2px solid var(--color-primary);
  color: var(--color-primary);
  background: transparent;
}
.btn-outline:hover {
  background: var(--color-primary);
  color: white;
}
.btn-accent {
  background: var(--color-accent);
  color: white;
}
.btn-accent:hover {
  background: #e08c4a;
  transform: translateY(-2px);
}

/* ============================================
   Header & Navigation
   ============================================ */
.site-header {
  position: sticky;
  top: 0;
  z-index: 1000;
  background: var(--color-white);
  box-shadow: var(--shadow-sm);
  border-bottom: 3px solid var(--color-primary);
}

.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 64px;
  gap: 24px;
}

.logo {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 1.2rem;
  color: var(--color-primary-dark);
  white-space: nowrap;
}
.logo-icon { font-size: 1.5rem; }
.logo strong { color: var(--color-primary); }

.main-nav ul {
  display: flex;
  align-items: center;
  gap: 4px;
}
.main-nav a {
  display: block;
  padding: 8px 14px;
  border-radius: var(--radius-sm);
  font-size: 0.9rem;
  font-weight: 500;
  color: var(--color-text);
  transition: var(--transition);
}
.main-nav a:hover,
.main-nav a.active {
  background: #e8f5ee;
  color: var(--color-primary);
}

/* Dropdown */
.dropdown { position: relative; }
.dropdown-menu {
  display: none;
  position: absolute;
  top: calc(100% + 8px);
  left: 0;
  background: white;
  box-shadow: var(--shadow-lg);
  border-radius: var(--radius-md);
  min-width: 160px;
  padding: 8px;
  border: 1px solid var(--color-border);
}
.dropdown-menu li a { border-radius: var(--radius-sm); }
.dropdown:hover .dropdown-menu { display: block; }

.nav-toggle { display: none; font-size: 1.4rem; padding: 8px; border-radius: var(--radius-sm); }

/* ============================================
   Hero
   ============================================ */
.hero {
  background: linear-gradient(135deg, var(--color-primary-dark) 0%, var(--color-primary) 60%, var(--color-primary-light) 100%);
  color: white;
  padding: 80px 0 60px;
  overflow: hidden;
  position: relative;
}
.hero::before {
  content: '';
  position: absolute;
  top: -50%;
  right: -10%;
  width: 600px;
  height: 600px;
  background: rgba(255,255,255,0.04);
  border-radius: 50%;
}
.hero-badge {
  display: inline-block;
  background: rgba(255,255,255,0.2);
  border: 1px solid rgba(255,255,255,0.4);
  color: white;
  padding: 4px 14px;
  border-radius: 999px;
  font-size: 0.8rem;
  font-weight: 500;
  margin-bottom: 16px;
  backdrop-filter: blur(4px);
}
.hero-content h1 { margin-bottom: 16px; }
.hero-content h1 strong { color: var(--color-accent); }
.hero-content p { font-size: 1.05rem; opacity: 0.9; max-width: 600px; margin-bottom: 32px; }
.hero-cta { display: flex; gap: 12px; flex-wrap: wrap; margin-bottom: 48px; }

.hero-stats {
  display: flex;
  gap: 24px;
  flex-wrap: wrap;
}
.stat-card {
  background: rgba(255,255,255,0.15);
  backdrop-filter: blur(8px);
  border: 1px solid rgba(255,255,255,0.25);
  border-radius: var(--radius-md);
  padding: 16px 24px;
  text-align: center;
  min-width: 100px;
}
.stat-num { display: block; font-size: 2rem; font-weight: 700; line-height: 1; }
.stat-label { font-size: 0.8rem; opacity: 0.8; }

/* ============================================
   Ad Container
   ============================================ */
.ad-container {
  margin: 32px auto;
  padding: 0 20px;
}
.ad-label {
  font-size: 0.7rem;
  color: var(--color-text-muted);
  text-align: center;
  margin-bottom: 4px;
  text-transform: uppercase;
  letter-spacing: 1px;
}
.ad-placeholder {
  background: #f0f0f0;
  border: 1px dashed var(--color-border);
  border-radius: var(--radius-sm);
  height: 90px;
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--color-text-muted);
  font-size: 0.85rem;
}

/* ============================================
   Sections
   ============================================ */
.section { padding: 60px 0; }
.section:nth-child(even) { background: white; }

.section-title {
  text-align: center;
  margin-bottom: 10px;
  color: var(--color-primary-dark);
}
.section-subtitle {
  text-align: center;
  color: var(--color-text-muted);
  margin-bottom: 40px;
}

/* ============================================
   Compare Cards (Home)
   ============================================ */
.card-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  gap: 24px;
}

.compare-card {
  display: flex;
  flex-direction: column;
  gap: 12px;
  background: var(--color-white);
  border-radius: var(--radius-md);
  padding: 24px;
  border: 1px solid var(--color-border);
  box-shadow: var(--shadow-sm);
  transition: var(--transition);
}
.compare-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-lg);
  border-color: var(--color-primary-light);
}
.compare-card-brands { display: flex; align-items: center; gap: 10px; }
.brand-tag {
  padding: 2px 10px;
  border-radius: 999px;
  font-size: 0.75rem;
  font-weight: 700;
  letter-spacing: 0.5px;
}
.brand-tag.rab { background: #fde8e8; color: var(--color-rab); }
.brand-tag.patagonia { background: #e8f0f7; color: var(--color-patagonia); }
.vs-badge {
  background: var(--color-primary);
  color: white;
  padding: 2px 8px;
  border-radius: 4px;
  font-size: 0.7rem;
  font-weight: 700;
}
.compare-card h3 { font-size: 1rem; color: var(--color-primary-dark); }
.compare-card p { font-size: 0.88rem; color: var(--color-text-muted); flex: 1; }
.card-meta { display: flex; flex-direction: column; gap: 4px; }
.card-meta span { font-size: 0.8rem; color: var(--color-text-muted); background: var(--color-bg); padding: 4px 8px; border-radius: 4px; }
.card-link { color: var(--color-primary); font-weight: 600; font-size: 0.88rem; }

/* ============================================
   Criteria Grid
   ============================================ */
.criteria-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
  gap: 24px;
}
.criteria-item {
  background: var(--color-white);
  padding: 28px 20px;
  border-radius: var(--color-radius-md, var(--radius-md));
  border-radius: var(--radius-md);
  text-align: center;
  border: 1px solid var(--color-border);
  transition: var(--transition);
}
.criteria-item:hover { box-shadow: var(--shadow-md); transform: translateY(-2px); }
.criteria-icon { font-size: 2.2rem; margin-bottom: 12px; display: block; }
.criteria-item h3 { margin-bottom: 8px; font-size: 1rem; color: var(--color-primary-dark); }
.criteria-item p { font-size: 0.85rem; color: var(--color-text-muted); }

/* ============================================
   Brand Cards
   ============================================ */
.brand-cards {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
  gap: 32px;
}
.brand-card {
  display: flex;
  flex-direction: column;
  gap: 14px;
  background: white;
  border-radius: var(--radius-md);
  padding: 32px;
  border: 1px solid var(--color-border);
  box-shadow: var(--shadow-sm);
  transition: var(--transition);
}
.brand-card:hover {
  box-shadow: var(--shadow-lg);
  transform: translateY(-4px);
}
.brand-logo {
  font-size: 2rem;
  font-weight: 900;
  letter-spacing: 4px;
  padding: 16px;
  border-radius: var(--radius-sm);
  text-align: center;
}
.rab-logo { background: #fde8e8; color: var(--color-rab); }
.patagonia-logo { background: #e8f0f7; color: var(--color-patagonia); font-size: 1.2rem; letter-spacing: 2px; }
.brand-card p { font-size: 0.9rem; color: var(--color-text-muted); }
.brand-highlights li { font-size: 0.85rem; color: var(--color-text); padding: 3px 0; }

/* ============================================
   Guide List
   ============================================ */
.guide-list { display: flex; flex-direction: column; gap: 16px; }
.guide-item {
  display: flex;
  gap: 20px;
  align-items: flex-start;
  background: white;
  border-radius: var(--radius-md);
  padding: 20px 24px;
  border: 1px solid var(--color-border);
  box-shadow: var(--shadow-sm);
  transition: var(--transition);
}
.guide-item:hover { box-shadow: var(--shadow-md); transform: translateX(4px); }
.guide-thumb { font-size: 2.5rem; flex-shrink: 0; }
.guide-info h3 { font-size: 1rem; margin-bottom: 4px; color: var(--color-primary-dark); }
.guide-info p { font-size: 0.87rem; color: var(--color-text-muted); }
.guide-tag {
  display: inline-block;
  margin-top: 6px;
  background: #e8f5ee;
  color: var(--color-primary);
  font-size: 0.73rem;
  font-weight: 600;
  padding: 2px 10px;
  border-radius: 999px;
}

/* ============================================
   Footer
   ============================================ */
.site-footer {
  background: var(--color-primary-dark);
  color: rgba(255,255,255,0.8);
  padding: 48px 0 24px;
  margin-top: 40px;
}
.footer-grid {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr;
  gap: 40px;
  margin-bottom: 40px;
}
.footer-about .logo { color: white; margin-bottom: 12px; }
.footer-about p { font-size: 0.85rem; line-height: 1.8; }
.footer-links h4 { color: white; font-size: 0.9rem; margin-bottom: 12px; text-transform: uppercase; letter-spacing: 1px; }
.footer-links li + li { margin-top: 8px; }
.footer-links a { font-size: 0.85rem; opacity: 0.8; transition: var(--transition); }
.footer-links a:hover { opacity: 1; color: var(--color-primary-light); }
.footer-bottom {
  border-top: 1px solid rgba(255,255,255,0.15);
  padding-top: 24px;
  font-size: 0.78rem;
  opacity: 0.7;
  line-height: 1.8;
}
.disclaimer-note { margin-top: 6px; opacity: 0.7; }

/* ============================================
   Compare Page - Specific Styles
   ============================================ */
.page-hero {
  background: linear-gradient(135deg, var(--color-primary-dark), var(--color-primary));
  color: white;
  padding: 48px 0;
  text-align: center;
}
.page-hero h1 { margin-bottom: 8px; }
.page-hero p { opacity: 0.85; }

/* Filter Bar */
.filter-bar {
  background: white;
  border-bottom: 1px solid var(--color-border);
  padding: 16px 0;
  position: sticky;
  top: 64px;
  z-index: 100;
}
.filter-inner {
  display: flex;
  gap: 12px;
  align-items: center;
  flex-wrap: wrap;
}
.filter-label { font-size: 0.85rem; font-weight: 600; color: var(--color-text-muted); }
.filter-btn {
  padding: 6px 16px;
  border-radius: 999px;
  border: 2px solid var(--color-border);
  font-size: 0.82rem;
  font-weight: 500;
  transition: var(--transition);
  cursor: pointer;
  background: white;
}
.filter-btn:hover,
.filter-btn.active {
  border-color: var(--color-primary);
  background: #e8f5ee;
  color: var(--color-primary);
}

/* Product Cards */
.product-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(320px, 1fr));
  gap: 24px;
  padding: 40px 0;
}

.product-card {
  background: white;
  border-radius: var(--radius-md);
  border: 1px solid var(--color-border);
  box-shadow: var(--shadow-sm);
  overflow: hidden;
  transition: var(--transition);
  display: flex;
  flex-direction: column;
}
.product-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-lg);
}

.product-card-header {
  padding: 20px 20px 0;
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
}
.product-brand-badge {
  padding: 3px 12px;
  border-radius: 999px;
  font-size: 0.73rem;
  font-weight: 700;
  letter-spacing: 0.5px;
}
.badge-rab { background: #fde8e8; color: var(--color-rab); }
.badge-patagonia { background: #e8f0f7; color: var(--color-patagonia); }
.product-score {
  background: var(--color-primary);
  color: white;
  border-radius: var(--radius-sm);
  padding: 4px 10px;
  font-size: 0.85rem;
  font-weight: 700;
}

.product-card-body { padding: 16px 20px; flex: 1; }
.product-card-body h3 { font-size: 1rem; margin-bottom: 6px; color: var(--color-primary-dark); }
.product-card-body .product-subtitle { font-size: 0.82rem; color: var(--color-text-muted); margin-bottom: 12px; }

.spec-pills { display: flex; flex-wrap: wrap; gap: 6px; margin-bottom: 14px; }
.spec-pill {
  background: var(--color-bg);
  border: 1px solid var(--color-border);
  border-radius: 4px;
  padding: 3px 10px;
  font-size: 0.75rem;
  color: var(--color-text);
}
.spec-pill strong { color: var(--color-primary); }

/* Score Bar */
.score-bars { display: flex; flex-direction: column; gap: 8px; }
.score-row { display: flex; align-items: center; gap: 10px; font-size: 0.8rem; }
.score-name { width: 60px; color: var(--color-text-muted); flex-shrink: 0; }
.score-bar-bg { flex: 1; background: #e9ecef; border-radius: 999px; height: 7px; overflow: hidden; }
.score-bar-fill { height: 100%; border-radius: 999px; background: var(--color-primary-light); transition: width 0.6s ease; }
.score-val { width: 28px; text-align: right; font-weight: 600; color: var(--color-primary-dark); }

.product-card-footer {
  padding: 16px 20px;
  border-top: 1px solid var(--color-border);
  display: flex;
  justify-content: space-between;
  align-items: center;
}
.product-price { font-size: 1.05rem; font-weight: 700; color: var(--color-primary-dark); }
.product-price-note { font-size: 0.72rem; color: var(--color-text-muted); display: block; font-weight: normal; }

/* ============================================
   Comparison Table
   ============================================ */
.comparison-table-section { padding: 40px 0; }
.table-wrapper { overflow-x: auto; }

.comp-table {
  width: 100%;
  border-collapse: separate;
  border-spacing: 0;
  font-size: 0.88rem;
  background: white;
  border-radius: var(--radius-md);
  overflow: hidden;
  box-shadow: var(--shadow-md);
}
.comp-table thead th {
  background: var(--color-primary-dark);
  color: white;
  padding: 16px 20px;
  text-align: left;
  font-weight: 600;
  letter-spacing: 0.3px;
}
.comp-table thead th:first-child { border-radius: 12px 0 0 0; }
.comp-table thead th:last-child { border-radius: 0 12px 0 0; }
.comp-table thead th.rab-col { background: #c22020; }
.comp-table thead th.patagonia-col { background: #2d6a9f; }

.comp-table tbody tr { transition: var(--transition); }
.comp-table tbody tr:hover { background: #f0f7f2; }
.comp-table tbody tr:nth-child(even) { background: #fafafa; }
.comp-table tbody tr:nth-child(even):hover { background: #f0f7f2; }

.comp-table td {
  padding: 14px 20px;
  border-bottom: 1px solid var(--color-border);
  vertical-align: middle;
}
.comp-table td:first-child { font-weight: 600; color: var(--color-text-muted); font-size: 0.83rem; }
.comp-table tr:last-child td { border-bottom: none; }

.winner-cell {
  color: var(--color-primary);
  font-weight: 700;
}
.better-badge {
  display: inline-block;
  background: #e8f5ee;
  color: var(--color-primary);
  font-size: 0.65rem;
  padding: 1px 6px;
  border-radius: 3px;
  margin-left: 4px;
  vertical-align: middle;
  font-weight: 600;
}

/* ============================================
   Brand Page
   ============================================ */
.brand-hero {
  padding: 60px 0;
  color: white;
}
.brand-hero.rab-hero { background: linear-gradient(135deg, #7b0000, var(--color-rab)); }
.brand-hero.patagonia-hero { background: linear-gradient(135deg, #1a3d5c, var(--color-patagonia)); }
.brand-hero-inner { display: flex; align-items: center; gap: 40px; }
.brand-hero-logo-lg {
  font-size: 3rem;
  font-weight: 900;
  letter-spacing: 6px;
  background: rgba(255,255,255,0.15);
  padding: 24px 32px;
  border-radius: var(--radius-md);
  flex-shrink: 0;
}
.brand-hero h1 { margin-bottom: 10px; }
.brand-hero p { opacity: 0.9; max-width: 560px; }
.brand-tags { display: flex; flex-wrap: wrap; gap: 8px; margin-top: 16px; }
.brand-tag-item {
  background: rgba(255,255,255,0.2);
  border: 1px solid rgba(255,255,255,0.35);
  padding: 4px 14px;
  border-radius: 999px;
  font-size: 0.78rem;
}

/* ============================================
   Product Detail
   ============================================ */
.detail-layout {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 40px;
  align-items: start;
}
.product-detail-img {
  background: linear-gradient(135deg, #f0f7f2, #c8e6c9);
  border-radius: var(--radius-lg);
  aspect-ratio: 1;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 6rem;
  position: sticky;
  top: 100px;
}
.detail-specs-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 12px;
  margin: 20px 0;
}
.spec-box {
  background: var(--color-bg);
  border-radius: var(--radius-sm);
  padding: 14px;
  border: 1px solid var(--color-border);
}
.spec-box-label { font-size: 0.75rem; color: var(--color-text-muted); margin-bottom: 4px; }
.spec-box-value { font-size: 1rem; font-weight: 700; color: var(--color-primary-dark); }

/* ============================================
   Guide Page
   ============================================ */
.guide-article { max-width: 800px; margin: 0 auto; padding: 40px 0; }
.guide-article h2 { margin: 40px 0 16px; color: var(--color-primary-dark); }
.guide-article p { margin-bottom: 16px; line-height: 1.85; }
.guide-article ul, .guide-article ol { padding-left: 24px; margin-bottom: 16px; }
.guide-article li { margin-bottom: 8px; }

.info-box {
  background: #e8f5ee;
  border-left: 4px solid var(--color-primary);
  border-radius: 0 var(--radius-sm) var(--radius-sm) 0;
  padding: 16px 20px;
  margin: 24px 0;
}
.info-box p { margin: 0; font-size: 0.9rem; }

/* ============================================
   About / Privacy / Disclaimer pages
   ============================================ */
.prose-page { max-width: 760px; margin: 0 auto; padding: 40px 20px; }
.prose-page h2 { color: var(--color-primary-dark); margin: 36px 0 12px; padding-top: 12px; border-top: 1px solid var(--color-border); }
.prose-page h2:first-of-type { border-top: none; margin-top: 8px; }
.prose-page p { margin-bottom: 14px; line-height: 1.85; color: var(--color-text); }
.prose-page ul { padding-left: 20px; margin-bottom: 14px; }
.prose-page li { margin-bottom: 6px; }
.prose-page .last-updated { font-size: 0.8rem; color: var(--color-text-muted); margin-bottom: 32px; }

/* Contact Form */
.contact-form { max-width: 600px; margin: 32px 0; }
.form-group { margin-bottom: 20px; }
.form-group label { display: block; font-weight: 600; font-size: 0.9rem; margin-bottom: 6px; }
.form-group input,
.form-group textarea,
.form-group select {
  width: 100%;
  padding: 12px 16px;
  border: 2px solid var(--color-border);
  border-radius: var(--radius-sm);
  font-family: var(--font-main);
  font-size: 0.95rem;
  transition: var(--transition);
  background: white;
}
.form-group input:focus,
.form-group textarea:focus,
.form-group select:focus {
  outline: none;
  border-color: var(--color-primary);
  box-shadow: 0 0 0 3px rgba(45,106,79,0.15);
}
.form-group textarea { min-height: 140px; resize: vertical; }

/* Breadcrumb */
.breadcrumb {
  padding: 12px 0;
  font-size: 0.82rem;
  color: var(--color-text-muted);
}
.breadcrumb a { color: var(--color-primary); }
.breadcrumb span { margin: 0 6px; }

/* Alert / Highlight boxes */
.highlight-box {
  background: #fff8e1;
  border-left: 4px solid var(--color-accent);
  padding: 14px 18px;
  border-radius: 0 var(--radius-sm) var(--radius-sm) 0;
  margin: 20px 0;
  font-size: 0.88rem;
}

/* ============================================
   Responsive
   ============================================ */
@media (max-width: 768px) {
  .main-nav { display: none; }
  .main-nav.open {
    display: block;
    position: fixed;
    top: 64px;
    left: 0;
    right: 0;
    bottom: 0;
    background: white;
    padding: 20px;
    overflow-y: auto;
    z-index: 999;
  }
  .main-nav.open ul { flex-direction: column; gap: 4px; }
  .main-nav.open a { padding: 12px 16px; font-size: 1rem; }
  .dropdown-menu { position: static; box-shadow: none; border: none; padding-left: 16px; }
  .dropdown:hover .dropdown-menu { display: none; }
  .dropdown.open .dropdown-menu { display: block; }

  .nav-toggle { display: block; }

  .hero { padding: 48px 0 40px; }
  .hero-cta { flex-direction: column; }
  .hero-stats { gap: 12px; }
  .stat-card { padding: 12px 20px; }

  .footer-grid { grid-template-columns: 1fr; gap: 24px; }
  .detail-layout { grid-template-columns: 1fr; }
  .product-detail-img { position: static; max-height: 300px; }
  .brand-hero-inner { flex-direction: column; text-align: center; }
  .comp-table { font-size: 0.8rem; }
  .comp-table td, .comp-table th { padding: 10px 12px; }
  .detail-specs-grid { grid-template-columns: 1fr 1fr; }
}

@media (max-width: 480px) {
  .card-grid { grid-template-columns: 1fr; }
  .criteria-grid { grid-template-columns: 1fr 1fr; }
  .brand-cards { grid-template-columns: 1fr; }
  .product-grid { grid-template-columns: 1fr; }
  .detail-specs-grid { grid-template-columns: 1fr; }
  h1 { font-size: 1.6rem; }
}

/* ============================================
   Utility
   ============================================ */
.text-center { text-align: center; }
.mt-8 { margin-top: 8px; }
.mt-16 { margin-top: 16px; }
.mt-32 { margin-top: 32px; }
.mb-8 { margin-bottom: 8px; }
.mb-16 { margin-bottom: 16px; }
.hidden { display: none !important; }
.sr-only { position: absolute; width: 1px; height: 1px; padding: 0; overflow: hidden; clip: rect(0,0,0,0); white-space: nowrap; border: 0; }