/* ═══════════════════════════════════════════════════════════════════
   BuyCheapRAM — Vercel Design System
   Clean, minimal, developer-focused aesthetic
   ═══════════════════════════════════════════════════════════════════ */

/* ── Fonts ── */
@import url('https://fonts.googleapis.com/css2?family=Inter:wght@400;500;600&family=JetBrains+Mono:wght@400&display=swap');

/* ── CSS Variables (Design Tokens) ── */
:root {
  /* Colors — Brand & Accent */
  --color-primary: #171717;
  --color-cyan: #50e3c2;
  --color-highlight-pink: #ff0080;
  --color-violet: #7928ca;
  --color-link: #0070f3;
  --color-link-deep: #0761d1;
  --color-link-bg-soft: #d3e5ff;

  /* Colors — Surface */
  --color-canvas: #ffffff;
  --color-canvas-soft: #fafafa;
  --color-canvas-soft-2: #f5f5f5;
  --color-hairline: #ebebeb;
  --color-hairline-strong: #a1a1a1;

  /* Colors — Text */
  --color-ink: #171717;
  --color-body: #666666;
  --color-mute: #888888;
  --color-on-primary: #ffffff;

  /* Colors — Semantic */
  --color-success: #0070f3;
  --color-error: #ee0000;
  --color-error-soft: #f7d4d6;
  --color-warning: #f5a623;
  --color-warning-soft: #ffefcf;

  /* Colors — Badge (for RAM type indicators) */
  --color-ddr5: #0070f3;
  --color-ddr5-bg: #d3e5ff;
  --color-ddr4: #50e3c2;
  --color-ddr4-bg: #d4f5ed;
  --color-ddr3: #f5a623;
  --color-ddr3-bg: #ffefcf;
  --color-ecc: #7928ca;
  --color-ecc-bg: #ede0f7;
  --color-so-dim: #171717;
  --color-so-dim-bg: #ebebeb;
  --color-best: #0070f3;

  /* Typography */
  --font-sans: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
  --font-mono: 'JetBrains Mono', 'SF Mono', 'Fira Code', monospace;

  /* Spacing (4px base) */
  --space-xxs: 4px;
  --space-xs: 8px;
  --space-sm: 12px;
  --space-md: 16px;
  --space-lg: 24px;
  --space-xl: 32px;
  --space-2xl: 40px;
  --space-3xl: 48px;
  --space-4xl: 64px;
  --space-5xl: 96px;
  --space-section: 128px;

  /* Radius */
  --radius-xs: 4px;
  --radius-sm: 6px;
  --radius-md: 8px;
  --radius-lg: 12px;
  --radius-xl: 16px;
  --radius-pill-sm: 64px;
  --radius-pill: 100px;
  --radius-full: 9999px;

  /* Shadows (stacked, subtle) */
  --shadow-level-1: inset 0 0 0 1px rgba(0,0,0,0.08);
  --shadow-level-2: 0px 1px 1px rgba(0,0,0,0.02), 0px 2px 2px rgba(0,0,0,0.04), inset 0 0 0 1px rgba(0,0,0,0.08);
  --shadow-level-3: 0px 2px 2px rgba(0,0,0,0.04), 0px 8px 8px -8px rgba(0,0,0,0.04), inset 0 0 0 1px rgba(0,0,0,0.08);
  --shadow-level-4: 0px 2px 2px rgba(0,0,0,0.04), 0px 8px 16px -4px rgba(0,0,0,0.04), inset 0 0 0 1px rgba(0,0,0,0.08);

  /* Layout */
  --page-width: 1200px;
  --header-height: 64px;
}

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

/* ── Base ── */
html { -webkit-font-smoothing: antialiased; -moz-osx-font-smoothing: grayscale; }
body {
  font-family: var(--font-sans);
  font-size: 14px;
  line-height: 1.6;
  color: var(--color-ink);
  background: var(--color-canvas-soft);
  min-height: 100vh;
}

a { color: var(--color-link); text-decoration: none; }
a:hover { text-decoration: underline; }

strong { font-weight: 600; }

/* ── Nav ── */
.site-nav {
  position: sticky;
  top: 0;
  z-index: 100;
  background: rgba(255,255,255,0.8);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--color-hairline);
  height: var(--header-height);
  display: flex;
  align-items: center;
  padding: 0 var(--space-lg);
}
.site-nav .nav-inner {
  max-width: var(--page-width);
  margin: 0 auto;
  width: 100%;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-lg);
}
.site-nav .nav-logo {
  font-size: 16px;
  font-weight: 600;
  color: var(--color-ink);
  letter-spacing: -0.4px;
  white-space: nowrap;
  text-decoration: none;
}
.site-nav .nav-logo:hover { text-decoration: none; }
.site-nav .nav-links {
  display: flex;
  align-items: center;
  gap: var(--space-xs);
}
.site-nav .nav-links a {
  font-size: 13px;
  font-weight: 400;
  color: var(--color-body);
  padding: var(--space-xxs) var(--space-sm);
  border-radius: var(--radius-full);
  transition: background 0.15s, color 0.15s;
  white-space: nowrap;
}
.site-nav .nav-links a:hover {
  background: var(--color-canvas-soft-2);
  color: var(--color-ink);
  text-decoration: none;
}
.site-nav .nav-links a.active {
  color: var(--color-ink);
  font-weight: 500;
}
.nav-hamburger {
  display: none;
  background: none;
  border: none;
  cursor: pointer;
  padding: var(--space-xs);
  color: var(--color-ink);
}

/* ── Hero Band ── */
.hero-band {
  position: relative;
  overflow: hidden;
  padding: var(--space-5xl) var(--space-lg) var(--space-4xl);
  background: var(--color-canvas);
  text-align: center;
}
.hero-band::before {
  content: '';
  position: absolute;
  top: -50%;
  left: -20%;
  right: -20%;
  bottom: -50%;
  background:
    radial-gradient(ellipse 600px 400px at 20% 30%, rgba(0,112,243,0.08), transparent),
    radial-gradient(ellipse 500px 350px at 80% 40%, rgba(121,40,202,0.06), transparent),
    radial-gradient(ellipse 400px 300px at 50% 60%, rgba(80,227,194,0.05), transparent);
  pointer-events: none;
}
.hero-band > * { position: relative; z-index: 1; }
.hero-band .hero-mono-label {
  font-family: var(--font-mono);
  font-size: 12px;
  color: var(--color-mute);
  letter-spacing: 0;
  margin-bottom: var(--space-md);
  display: inline-block;
  background: var(--color-canvas-soft);
  padding: var(--space-xxs) var(--space-sm);
  border-radius: var(--radius-full);
}
.hero-band h1 {
  font-size: 48px;
  font-weight: 600;
  line-height: 1;
  letter-spacing: -2.4px;
  color: var(--color-ink);
  max-width: 720px;
  margin: 0 auto var(--space-lg);
}
.hero-band .hero-lead {
  font-size: 18px;
  line-height: 1.6;
  color: var(--color-body);
  max-width: 560px;
  margin: 0 auto var(--space-xl);
}
.hero-band .hero-cta-row {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-sm);
  flex-wrap: wrap;
}

/* ── Buttons ── */
.btn-primary {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-xs);
  background: var(--color-primary);
  color: var(--color-on-primary);
  font-family: var(--font-sans);
  font-size: 16px;
  font-weight: 500;
  line-height: 1;
  padding: 14px var(--space-lg);
  border-radius: var(--radius-pill);
  border: none;
  cursor: pointer;
  transition: background 0.15s, opacity 0.15s;
  white-space: nowrap;
  text-decoration: none;
}
.btn-primary:hover {
  background: #333;
  text-decoration: none;
  color: var(--color-on-primary);
}
.btn-secondary {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-xs);
  background: var(--color-canvas);
  color: var(--color-ink);
  font-family: var(--font-sans);
  font-size: 16px;
  font-weight: 500;
  line-height: 1;
  padding: 14px var(--space-lg);
  border-radius: var(--radius-pill);
  border: 1px solid var(--color-hairline);
  cursor: pointer;
  transition: background 0.15s, border-color 0.15s;
  white-space: nowrap;
  text-decoration: none;
}
.btn-secondary:hover {
  background: var(--color-canvas-soft);
  border-color: var(--color-hairline-strong);
  text-decoration: none;
  color: var(--color-ink);
}

/* ── Section Layout ── */
.section {
  max-width: var(--page-width);
  margin: 0 auto;
  padding: var(--space-4xl) var(--space-lg);
}
.section-dark {
  background: var(--color-primary);
  color: var(--color-on-primary);
  padding: var(--space-5xl) var(--space-lg);
}
.section-dark .section-inner {
  max-width: var(--page-width);
  margin: 0 auto;
}
.section-dark h2,
.section-dark h3 { color: var(--color-on-primary); }
.section-dark p { color: rgba(255,255,255,0.7); }
.section-eyebrow {
  font-family: var(--font-mono);
  font-size: 12px;
  color: var(--color-mute);
  text-transform: uppercase;
  letter-spacing: 0.5px;
  margin-bottom: var(--space-xs);
}
.section h2 {
  font-size: 32px;
  font-weight: 600;
  line-height: 1.25;
  letter-spacing: -1.28px;
  color: var(--color-ink);
  margin-bottom: var(--space-md);
}
.section p.lead {
  font-size: 18px;
  line-height: 1.6;
  color: var(--color-body);
  max-width: 640px;
  margin-bottom: var(--space-xl);
}

/* ── Cards ── */
.card {
  background: var(--color-canvas);
  border-radius: var(--radius-md);
  box-shadow: var(--shadow-level-3);
  padding: var(--space-lg);
  transition: box-shadow 0.2s;
}
.card:hover {
  box-shadow: var(--shadow-level-4);
}

/* ── Filter Bar ── */
.filter-bar {
  background: var(--color-canvas);
  border-bottom: 1px solid var(--color-hairline);
  padding: var(--space-sm) var(--space-lg);
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-xs) var(--space-md);
  align-items: center;
  position: sticky;
  top: var(--header-height);
  z-index: 99;
}
.filter-bar .filter-group {
  display: flex;
  align-items: center;
  gap: 6px;
}
.filter-bar label {
  font-family: var(--font-mono);
  font-size: 11px;
  color: var(--color-mute);
  text-transform: uppercase;
  letter-spacing: 0.5px;
}
.filter-bar select,
.filter-bar input[type="text"] {
  font-family: var(--font-sans);
  font-size: 13px;
  color: var(--color-ink);
  background: var(--color-canvas);
  border: 1px solid var(--color-hairline);
  border-radius: var(--radius-sm);
  padding: 6px var(--space-sm);
  outline: none;
  transition: border-color 0.15s;
}
.filter-bar select:focus,
.filter-bar input:focus {
  border-color: var(--color-ink);
}
.filter-bar input[type="text"] { width: 180px; }
.filter-btn {
  font-family: var(--font-sans);
  font-size: 13px;
  font-weight: 500;
  color: var(--color-body);
  background: var(--color-canvas);
  border: 1px solid var(--color-hairline);
  border-radius: var(--radius-sm);
  padding: 6px var(--space-sm);
  cursor: pointer;
  transition: all 0.15s;
}
.filter-btn:hover {
  border-color: var(--color-hairline-strong);
  color: var(--color-ink);
}
.filter-btn.active {
  background: var(--color-primary);
  color: var(--color-on-primary);
  border-color: var(--color-primary);
}

/* ── Table ── */
.table-wrap {
  overflow-x: auto;
  padding: 0;
}
.table-wrap table {
  width: 100%;
  border-collapse: collapse;
  font-size: 13px;
}
.table-wrap thead th {
  font-family: var(--font-mono);
  font-size: 11px;
  font-weight: 500;
  text-transform: uppercase;
  letter-spacing: 0.5px;
  color: var(--color-mute);
  text-align: right;
  padding: var(--space-sm) var(--space-md);
  border-bottom: 1px solid var(--color-hairline);
  cursor: pointer;
  white-space: nowrap;
  user-select: none;
  position: sticky;
  top: 0;
  background: var(--color-canvas);
  z-index: 10;
}
.table-wrap thead th:first-child { text-align: left; }
.table-wrap thead th:last-child { text-align: center; }
.table-wrap thead th .sort-arrow {
  display: inline-block;
  margin-left: 4px;
  color: var(--color-hairline-strong);
  font-size: 9px;
}
.table-wrap thead th.sort-asc .sort-arrow,
.table-wrap thead th.sort-desc .sort-arrow {
  color: var(--color-ink);
}
.table-wrap tbody tr {
  border-bottom: 1px solid var(--color-hairline);
  transition: background 0.1s;
}
.table-wrap tbody tr:hover {
  background: var(--color-canvas-soft);
}
.table-wrap td {
  padding: var(--space-xs) var(--space-md);
  vertical-align: middle;
  text-align: right;
  white-space: nowrap;
  color: var(--color-body);
}
.table-wrap td:first-child {
  text-align: left;
  color: var(--color-ink);
  white-space: normal;
  word-break: break-word;
  font-weight: 500;
}
.table-wrap td:last-child { text-align: center; }

/* ── Badges ── */
.badge {
  display: inline-block;
  padding: 2px 8px;
  border-radius: var(--radius-pill-sm);
  font-size: 11px;
  font-weight: 500;
  letter-spacing: 0.2px;
}
.badge-ddr5 { background: var(--color-ddr5-bg); color: var(--color-ddr5); }
.badge-ddr4 { background: var(--color-ddr4-bg); color: var(--color-ddr4); }
.badge-ddr3 { background: var(--color-ddr3-bg); color: var(--color-ddr3); }
.badge-ecc { background: var(--color-ecc-bg); color: var(--color-ecc); }
.badge-so { background: var(--color-so-dim-bg); color: var(--color-so-dim); }

/* ── Price Per GB ── */
.ppgb {
  font-weight: 600;
  font-size: 14px;
  color: var(--color-ink);
  font-family: var(--font-mono);
}
.ppgb-good { color: var(--color-link); }
.ppgb-ok { color: var(--color-warning); }
.ppgb-meh { color: #e65100; }
.ppgb-bad { color: var(--color-error); }

/* ── Price ── */
.price {
  font-weight: 600;
  color: var(--color-ink);
}

/* ── Capacity & Speed ── */
.cap { font-weight: 600; color: var(--color-ink); }
.speed { color: var(--color-mute); font-family: var(--font-mono); font-size: 12px; }

/* ── Best Value ── */
.best-value {
  background: var(--color-ddr5-bg);
  padding: 2px 8px;
  border-radius: var(--radius-xs);
  font-weight: 700;
  color: var(--color-link);
  font-size: 11px;
}

/* ── Buy Link ── */
.buy-link {
  display: inline-flex;
  align-items: center;
  gap: 4px;
  background: var(--color-primary);
  color: var(--color-on-primary);
  font-size: 12px;
  font-weight: 500;
  padding: 5px 14px;
  border-radius: var(--radius-sm);
  transition: background 0.15s;
  text-decoration: none;
}
.buy-link:hover {
  background: #333;
  text-decoration: none;
  color: var(--color-on-primary);
}

/* ── Empty State ── */
.empty-state {
  display: none;
  text-align: center;
  padding: var(--space-5xl) var(--space-lg);
  color: var(--color-mute);
}
.empty-state.show { display: block; }
.empty-state p:first-child {
  font-size: 48px;
  margin-bottom: var(--space-md);
}
.empty-state .empty-hint {
  font-size: 13px;
  color: var(--color-hairline-strong);
  margin-top: var(--space-xs);
}

/* ── Pagination ── */
.pagination {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-xxs);
  padding: var(--space-md) var(--space-lg);
  flex-wrap: wrap;
}
.pagination .page-info {
  color: var(--color-mute);
  font-size: 12px;
  margin: 0 var(--space-sm);
  white-space: nowrap;
}
.pagination button {
  min-width: 36px;
  height: 36px;
  border: 1px solid var(--color-hairline);
  border-radius: var(--radius-md);
  background: var(--color-canvas);
  color: var(--color-body);
  font-size: 13px;
  font-weight: 500;
  cursor: pointer;
  transition: all 0.15s;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 0 var(--space-xs);
  font-family: var(--font-sans);
}
.pagination button:hover:not(:disabled):not(.active) {
  border-color: var(--color-ink);
  color: var(--color-ink);
}
.pagination button.active {
  background: var(--color-primary);
  border-color: var(--color-primary);
  color: var(--color-on-primary);
  cursor: default;
}
.pagination button:disabled { opacity: 0.3; cursor: not-allowed; }
.pagination button.nav-arrow { font-size: 16px; font-weight: 700; min-width: 40px; }
.pagination .ellipsis { color: var(--color-mute); font-size: 14px; padding: 0 4px; user-select: none; }

/* ── SEO Link Pills ── */
.seo-links {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-xs);
  justify-content: center;
}
.seo-links a {
  border: 1px solid var(--color-hairline);
  background: var(--color-canvas);
  border-radius: var(--radius-pill);
  padding: var(--space-xs) var(--space-md);
  font-size: 13px;
  font-weight: 500;
  color: var(--color-body);
  transition: all 0.15s;
}
.seo-links a:hover {
  border-color: var(--color-ink);
  color: var(--color-ink);
  text-decoration: none;
}

/* ── Content Section (guides, FAQ) ── */
.content-section {
  max-width: 860px;
  margin: 0 auto;
  padding: var(--space-3xl) var(--space-lg);
  color: var(--color-body);
  line-height: 1.7;
}
.content-section h2 {
  font-size: 24px;
  font-weight: 600;
  letter-spacing: -0.8px;
  color: var(--color-ink);
  margin-bottom: var(--space-md);
}
.content-section h3 {
  font-size: 17px;
  font-weight: 600;
  color: var(--color-ink);
  margin: var(--space-lg) 0 var(--space-xs);
}
.content-section p, .content-section li {
  color: var(--color-body);
  font-size: 15px;
}
.content-section ul { padding-left: 24px; margin: var(--space-xs) 0; }
.content-section li { margin: var(--space-xs) 0; }

/* ── FAQ Grid ── */
.faq-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: var(--space-md);
  margin-top: var(--space-lg);
}
.faq-card {
  background: var(--color-canvas);
  border-radius: var(--radius-md);
  box-shadow: var(--shadow-level-2);
  padding: var(--space-lg);
}
.faq-card h3 {
  font-size: 15px;
  font-weight: 600;
  color: var(--color-ink);
  margin: 0 0 var(--space-xs);
}
.faq-card p {
  color: var(--color-body);
  font-size: 14px;
  margin: 0;
}

/* ── Guide Cards (bottom section) ── */
.guide-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
  gap: var(--space-sm);
}
.guide-card {
  display: flex;
  align-items: center;
  gap: var(--space-sm);
  background: var(--color-canvas);
  border: 1px solid var(--color-hairline);
  border-radius: var(--radius-md);
  padding: var(--space-md) var(--space-lg);
  font-size: 14px;
  font-weight: 500;
  color: var(--color-ink);
  transition: all 0.15s;
  text-decoration: none;
}
.guide-card:hover {
  border-color: var(--color-ink);
  text-decoration: none;
  color: var(--color-ink);
}
.guide-card .guide-emoji { font-size: 18px; }

/* ── Footer ── */
.site-footer {
  border-top: 1px solid var(--color-hairline);
  padding: var(--space-4xl) var(--space-lg) var(--space-xl);
  background: var(--color-canvas);
}
.site-footer .footer-inner {
  max-width: var(--page-width);
  margin: 0 auto;
}
.site-footer .footer-columns {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(160px, 1fr));
  gap: var(--space-xl) var(--space-lg);
  margin-bottom: var(--space-3xl);
}
.site-footer .footer-col-label {
  font-family: var(--font-mono);
  font-size: 11px;
  font-weight: 500;
  text-transform: uppercase;
  letter-spacing: 0.5px;
  color: var(--color-ink);
  margin-bottom: var(--space-sm);
}
.site-footer .footer-col a {
  display: block;
  font-size: 13px;
  color: var(--color-body);
  padding: var(--space-xxs) 0;
  transition: color 0.15s;
}
.site-footer .footer-col a:hover {
  color: var(--color-ink);
  text-decoration: none;
}
.site-footer .footer-bottom {
  border-top: 1px solid var(--color-hairline);
  padding-top: var(--space-lg);
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: var(--space-sm);
}
.site-footer .footer-bottom p {
  font-size: 12px;
  color: var(--color-mute);
}
.site-footer .footer-legal {
  display: flex;
  gap: var(--space-md);
}
.site-footer .footer-legal a {
  font-size: 12px;
  color: var(--color-mute);
}
.site-footer .footer-legal a:hover { color: var(--color-ink); }

/* ── Article (Content Pages) ── */
.article-wrap {
  max-width: 860px;
  margin: 0 auto;
  padding: var(--space-3xl) var(--space-lg) var(--space-4xl);
}
.article-wrap .breadcrumb {
  font-family: var(--font-mono);
  font-size: 12px;
  color: var(--color-mute);
  margin-bottom: var(--space-lg);
}
.article-wrap .breadcrumb a { color: var(--color-mute); }
.article-wrap .breadcrumb a:hover { color: var(--color-ink); }
.article-wrap .breadcrumb span { margin: 0 var(--space-xs); }
.article-wrap h1 {
  font-size: 36px;
  font-weight: 600;
  line-height: 1.15;
  letter-spacing: -1.6px;
  color: var(--color-ink);
  margin-bottom: var(--space-md);
}
.article-wrap .article-meta {
  font-family: var(--font-mono);
  font-size: 12px;
  color: var(--color-mute);
  margin-bottom: var(--space-2xl);
}
.article-wrap .intro {
  font-size: 18px;
  line-height: 1.6;
  color: var(--color-body);
  margin-bottom: var(--space-2xl);
}
.article-wrap h2 {
  font-size: 24px;
  font-weight: 600;
  letter-spacing: -0.8px;
  color: var(--color-ink);
  margin: var(--space-3xl) 0 var(--space-md);
  padding-bottom: var(--space-sm);
  border-bottom: 1px solid var(--color-hairline);
}
.article-wrap h3 {
  font-size: 17px;
  font-weight: 600;
  color: var(--color-ink);
  margin: var(--space-xl) 0 var(--space-xs);
}
.article-wrap p, .article-wrap li {
  font-size: 15px;
  color: var(--color-body);
  line-height: 1.7;
}
.article-wrap ul, .article-wrap ol {
  padding-left: 24px;
  margin: var(--space-sm) 0;
}
.article-wrap li { margin: var(--space-xs) 0; }

/* ── Article CTA ── */
.article-cta {
  display: inline-flex;
  align-items: center;
  gap: var(--space-xs);
  background: var(--color-primary);
  color: var(--color-on-primary);
  padding: 12px var(--space-lg);
  border-radius: var(--radius-pill);
  font-size: 15px;
  font-weight: 500;
  margin: var(--space-lg) 0;
  transition: background 0.15s;
  text-decoration: none;
}
.article-cta:hover {
  background: #333;
  text-decoration: none;
  color: var(--color-on-primary);
}

/* ── Tip / Warning Boxes ── */
.tip-box {
  background: var(--color-canvas);
  border: 1px solid var(--color-hairline);
  border-left: 3px solid var(--color-link);
  padding: var(--space-lg);
  border-radius: var(--radius-sm);
  margin: var(--space-lg) 0;
}
.tip-box strong { color: var(--color-link); }
.warning-box {
  background: var(--color-warning-soft);
  border: 1px solid #f5c77a;
  border-left: 3px solid var(--color-warning);
  padding: var(--space-lg);
  border-radius: var(--radius-sm);
  margin: var(--space-lg) 0;
}
.warning-box strong { color: #ab570a; }

/* ── Comparison Table (articles) ── */
.comparison-table {
  width: 100%;
  border-collapse: collapse;
  margin: var(--space-lg) 0;
  font-size: 13px;
  background: var(--color-canvas);
  border-radius: var(--radius-md);
  overflow: hidden;
  box-shadow: var(--shadow-level-2);
}
.comparison-table th {
  font-family: var(--font-mono);
  font-size: 11px;
  font-weight: 500;
  text-transform: uppercase;
  letter-spacing: 0.5px;
  color: var(--color-mute);
  text-align: left;
  padding: var(--space-sm) var(--space-md);
  border-bottom: 1px solid var(--color-hairline);
  background: var(--color-canvas-soft);
}
.comparison-table td {
  padding: var(--space-sm) var(--space-md);
  border-bottom: 1px solid var(--color-hairline);
  color: var(--color-body);
}
.comparison-table tr:last-child td { border-bottom: none; }
.comparison-table tr:hover td { background: var(--color-canvas-soft); }

/* ── Related Articles ── */
.related-box {
  background: var(--color-canvas);
  border: 1px solid var(--color-hairline);
  border-radius: var(--radius-md);
  padding: var(--space-lg);
  margin: var(--space-3xl) 0;
}
.related-box h3 {
  font-size: 16px;
  font-weight: 600;
  color: var(--color-ink);
  margin: 0 0 var(--space-sm);
}
.related-box ul { list-style: none; padding: 0; margin: 0; }
.related-box li { margin: var(--space-xs) 0; }
.related-box a {
  font-size: 14px;
  color: var(--color-link);
}

/* ── Author Box ── */
.author-box {
  display: flex;
  align-items: center;
  gap: var(--space-md);
  background: var(--color-canvas);
  border: 1px solid var(--color-hairline);
  border-radius: var(--radius-md);
  padding: var(--space-lg);
  margin: var(--space-3xl) 0;
}
.author-avatar {
  width: 48px;
  height: 48px;
  border-radius: var(--radius-full);
  background: var(--color-canvas-soft-2);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 20px;
  flex-shrink: 0;
}
.author-info .author-name {
  font-weight: 600;
  font-size: 14px;
  color: var(--color-ink);
}
.author-info .author-role {
  font-size: 12px;
  color: var(--color-mute);
}

/* ── Cookie Banner ── */
.cookie-banner {
  display: none;
  position: fixed;
  bottom: 0;
  left: 0;
  right: 0;
  background: var(--color-canvas);
  border-top: 1px solid var(--color-hairline);
  padding: var(--space-md) var(--space-lg);
  z-index: 9999;
  box-shadow: 0 -2px 8px rgba(0,0,0,0.06);
}
.cookie-banner .cookie-inner {
  max-width: var(--page-width);
  margin: 0 auto;
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: var(--space-sm);
  font-size: 13px;
  color: var(--color-body);
}
.cookie-banner .cookie-actions {
  display: flex;
  gap: var(--space-xs);
}
.cookie-accept {
  background: var(--color-primary);
  color: var(--color-on-primary);
  border: none;
  padding: var(--space-xs) var(--space-lg);
  border-radius: var(--radius-sm);
  cursor: pointer;
  font-size: 13px;
  font-weight: 500;
  font-family: var(--font-sans);
}
.cookie-decline {
  background: var(--color-canvas);
  color: var(--color-body);
  border: 1px solid var(--color-hairline);
  padding: var(--space-xs) var(--space-lg);
  border-radius: var(--radius-sm);
  cursor: pointer;
  font-size: 13px;
  font-family: var(--font-sans);
}

/* ── Stats Row ── */
.stats-row {
  display: flex;
  justify-content: center;
  gap: var(--space-3xl);
  margin-top: var(--space-2xl);
}
.stat-item {
  text-align: center;
}
.stat-value {
  font-size: 32px;
  font-weight: 600;
  letter-spacing: -1.28px;
  color: var(--color-ink);
  font-family: var(--font-mono);
}
.stat-label {
  font-family: var(--font-mono);
  font-size: 11px;
  color: var(--color-mute);
  text-transform: uppercase;
  letter-spacing: 0.5px;
  margin-top: var(--space-xxs);
}

/* ── Affiliate Notice ── */
.affiliate-notice {
  text-align: center;
  font-size: 11px;
  color: var(--color-mute);
  margin-bottom: var(--space-sm);
}
.affiliate-notice a { color: var(--color-mute); }
.affiliate-notice a:hover { color: var(--color-link); }

/* ── 404 ── */
.error-page {
  text-align: center;
  padding: var(--space-5xl) var(--space-lg);
}
.error-page .error-code {
  font-size: 96px;
  font-weight: 600;
  letter-spacing: -4px;
  color: var(--color-hairline);
  line-height: 1;
}
.error-page h1 {
  font-size: 32px;
  font-weight: 600;
  letter-spacing: -1.28px;
  color: var(--color-ink);
  margin: var(--space-md) 0;
}
.error-page p {
  font-size: 16px;
  color: var(--color-body);
  margin-bottom: var(--space-xl);
}

/* ── Responsive ── */
@media (max-width: 960px) {
  .hero-band h1 { font-size: 36px; letter-spacing: -1.8px; }
  .stats-row { gap: var(--space-xl); }
  .stat-value { font-size: 24px; }
}

@media (max-width: 768px) {
  .site-nav { padding: 0 var(--space-md); }
  .site-nav .nav-links { display: none; }
  .nav-hamburger { display: block; }
  .site-nav .nav-links.open {
    display: flex;
    flex-direction: column;
    position: absolute;
    top: var(--header-height);
    left: 0;
    right: 0;
    background: var(--color-canvas);
    border-bottom: 1px solid var(--color-hairline);
    padding: var(--space-sm) var(--space-md);
    box-shadow: var(--shadow-level-3);
  }

  .hero-band {
    padding: var(--space-4xl) var(--space-md) var(--space-3xl);
  }
  .hero-band h1 {
    font-size: 28px;
    letter-spacing: -1.2px;
  }
  .hero-band .hero-lead { font-size: 16px; }

  .filter-bar {
    gap: var(--space-xs);
    padding: var(--space-xs) var(--space-md);
    overflow-x: auto;
    flex-wrap: nowrap;
    -webkit-overflow-scrolling: touch;
    scrollbar-width: none;
  }
  .filter-bar::-webkit-scrollbar { display: none; }
  .filter-group { flex-shrink: 0; }
  .filter-bar input[type="text"] { width: 140px; }

  .section { padding: var(--space-3xl) var(--space-md); }
  .content-section { padding: var(--space-xl) var(--space-md); }
  .article-wrap { padding: var(--space-xl) var(--space-md) var(--space-3xl); }
  .article-wrap h1 { font-size: 28px; letter-spacing: -1.2px; }

  .stats-row { gap: var(--space-lg); }
  .stat-value { font-size: 20px; letter-spacing: -0.8px; }

  .guide-grid { grid-template-columns: 1fr; }
  .faq-grid { grid-template-columns: 1fr; }

  .site-footer { padding: var(--space-3xl) var(--space-md) var(--space-lg); }
  .site-footer .footer-columns { grid-template-columns: repeat(2, 1fr); }
}

@media (max-width: 500px) {
  /* Mobile card layout for table */
  .table-wrap table,
  .table-wrap thead,
  .table-wrap tbody,
  .table-wrap th,
  .table-wrap td,
  .table-wrap tr { display: block; }
  .table-wrap thead { display: none; }
  .table-wrap tbody tr {
    background: var(--color-canvas);
    border: 1px solid var(--color-hairline);
    border-radius: var(--radius-md);
    margin: var(--space-xs) var(--space-md);
    padding: 0;
    overflow: hidden;
    box-shadow: var(--shadow-level-1);
  }
  .table-wrap td {
    display: inline-block;
    text-align: left;
    padding: var(--space-xxs) var(--space-md);
    border: none;
    font-size: 13px;
  }
  .table-wrap td:first-child {
    display: block;
    font-weight: 600;
    font-size: 14px;
    padding: var(--space-sm) var(--space-md) var(--space-xxs);
    color: var(--color-ink);
  }
  .table-wrap td[data-label="$ / GB"] {
    font-size: 18px;
    font-weight: 700;
    padding: var(--space-xxs) var(--space-md);
  }
  .table-wrap td[data-label="$ / GB"]::before { display: none; }
  .table-wrap td[data-label="Price"] {
    font-size: 16px;
    font-weight: 600;
    color: var(--color-ink);
    padding: var(--space-xxs) var(--space-md);
  }
  .table-wrap td[data-label="Price"]::before { display: none; }
  .table-wrap td::before {
    content: attr(data-label) ": ";
    color: var(--color-mute);
    font-size: 11px;
    text-transform: uppercase;
    letter-spacing: 0.3px;
    margin-right: 4px;
  }

  .hero-band { padding: var(--space-3xl) var(--space-md) var(--space-2xl); }
  .hero-band h1 { font-size: 24px; letter-spacing: -1px; }

  .site-footer .footer-columns { grid-template-columns: 1fr; }
}