:root {
  --brand: #1e40af;
  --brand-light: rgba(30, 64, 175, 0.07);
  --brand-dark: #1e3a8a;
  --accent: #f59e0b;
  --text-primary: #111827;
  --text-secondary: #4b5563;
  --text-muted: #9ca3af;
  --surface: #ffffff;
  --surface-alt: #f9fafb;
  --border: rgba(0,0,0,0.06);
  --radius-sm: 6px;
  --radius-md: 12px;
  --radius-lg: 20px;
  --space-1: 8px;
  --space-2: 13px;
  --space-3: 21px;
  --space-5: 34px;
  --space-8: 55px;
}

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

body {
  font-family: 'Inter', -apple-system, BlinkMacSystemFont, sans-serif;
  font-size: 16px;
  line-height: 1.7;
  color: var(--text-primary);
  background: var(--surface);
}

.site-nav {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: var(--space-2) var(--space-5);
  border-bottom: 1px solid var(--border);
  position: sticky;
  top: 0;
  background: rgba(255,255,255,0.95);
  backdrop-filter: blur(16px);
  z-index: 100;
}

.site-logo {
  font-family: 'Merriweather', Georgia, serif;
  font-size: 22px;
  font-weight: 700;
  color: var(--brand);
  text-decoration: none;
  letter-spacing: -0.02em;
}

.nav-toggle {
  display: none;
  background: none;
  border: none;
  font-size: 24px;
  cursor: pointer;
  color: var(--text-secondary);
}

.nav-links { display: flex; gap: var(--space-3); }
.nav-links a {
  color: var(--text-secondary);
  text-decoration: none;
  font-size: 14px;
  font-weight: 500;
  transition: color 0.2s;
}
.nav-links a:hover { color: var(--brand); }

.hero {
  background: linear-gradient(135deg, var(--brand) 0%, var(--brand-dark) 100%);
  color: #fff;
  text-align: center;
  padding: var(--space-8) var(--space-5);
}
.hero h1 {
  font-family: 'Merriweather', Georgia, serif;
  font-size: 42px;
  font-weight: 700;
  margin-bottom: var(--space-2);
  letter-spacing: -0.02em;
}
.hero p {
  font-size: 18px;
  opacity: 0.9;
  max-width: 600px;
  margin: 0 auto;
}

.content {
  max-width: 760px;
  margin: 0 auto;
  padding: var(--space-5) var(--space-3);
}

.breadcrumbs {
  font-size: 13px;
  color: var(--text-muted);
  margin-bottom: var(--space-3);
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}
.breadcrumbs a { color: var(--text-secondary); text-decoration: none; }
.breadcrumbs a:hover { color: var(--brand); }
.breadcrumbs span { margin: 0 4px; }

.post-header { margin-bottom: var(--space-5); }
.post-header h1 {
  font-family: 'Merriweather', Georgia, serif;
  font-size: 34px;
  font-weight: 700;
  line-height: 1.25;
  letter-spacing: -0.02em;
  color: var(--text-primary);
  margin-bottom: var(--space-2);
}

.post-meta {
  display: flex;
  align-items: center;
  gap: var(--space-2);
  font-size: 14px;
  color: var(--text-muted);
  margin-bottom: var(--space-1);
}
.reading-time::before { content: '\00b7'; margin-right: var(--space-1); }

.post-categories { display: flex; gap: var(--space-1); flex-wrap: wrap; margin-top: var(--space-1); }
.post-categories a {
  font-size: 12px;
  background: var(--brand-light);
  color: var(--brand);
  padding: 3px 10px;
  border-radius: 100px;
  text-decoration: none;
  font-weight: 500;
  transition: background 0.2s;
}
.post-categories a:hover { background: rgba(30, 64, 175, 0.14); }

.post-body {
  font-family: 'Merriweather', Georgia, serif;
  font-size: 17px;
  line-height: 1.85;
  color: var(--text-primary);
}
.post-body p { margin-bottom: var(--space-3); }
.post-body img {
  max-width: 100%;
  height: auto;
  border-radius: var(--radius-md);
  margin: var(--space-3) 0;
}
.post-body h2, .post-body h3 {
  font-family: 'Inter', sans-serif;
  font-weight: 700;
  margin-top: var(--space-8);
  margin-bottom: var(--space-2);
  letter-spacing: -0.01em;
}
.post-body h2 { font-size: 24px; }
.post-body h3 { font-size: 20px; }
.post-body a { color: var(--brand); text-decoration: underline; text-underline-offset: 2px; }
.post-body blockquote {
  border-left: 3px solid var(--brand);
  padding-left: var(--space-3);
  margin: var(--space-3) 0;
  color: var(--text-secondary);
  font-style: italic;
}
.post-body ul, .post-body ol { margin: var(--space-2) 0 var(--space-3) var(--space-3); }
.post-body li { margin-bottom: var(--space-1); }

.ad-slot {
  margin: var(--space-5) 0;
  min-height: 90px;
  border-radius: var(--radius-sm);
}
.ad-top { max-width: 760px; margin: var(--space-2) auto; padding: 0 var(--space-3); }
.ad-in-content { margin: var(--space-5) calc(-1 * var(--space-3)); padding: var(--space-2) var(--space-3); background: var(--surface-alt); border-radius: var(--radius-sm); }

.related-posts {
  margin-top: var(--space-8);
  padding-top: var(--space-5);
  border-top: 1px solid var(--border);
}
.related-posts h2 {
  font-family: 'Inter', sans-serif;
  font-size: 20px;
  font-weight: 700;
  margin-bottom: var(--space-3);
}
.related-grid { display: grid; grid-template-columns: repeat(2, 1fr); gap: var(--space-2); }
.related-card {
  padding: var(--space-2);
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  text-decoration: none;
  color: inherit;
  transition: all 0.2s;
}
.related-card:hover { border-color: var(--brand); transform: translateY(-1px); box-shadow: 0 4px 12px rgba(0,0,0,0.06); }
.related-card h3 { font-size: 15px; font-weight: 600; line-height: 1.4; margin-bottom: 4px; color: var(--text-primary); }
.related-card time { font-size: 12px; color: var(--text-muted); }

.index-title {
  font-family: 'Merriweather', Georgia, serif;
  font-size: 34px;
  font-weight: 700;
  margin-bottom: var(--space-2);
  letter-spacing: -0.02em;
}

.category-count { color: var(--text-muted); font-size: 14px; margin-bottom: var(--space-5); }

.post-grid { display: grid; gap: var(--space-3); }
.post-card {
  padding: var(--space-3);
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  transition: all 0.3s cubic-bezier(0.16, 1, 0.3, 1);
}
.post-card:hover {
  transform: translateY(-2px);
  box-shadow: 0 8px 30px rgba(0,0,0,0.06);
  border-color: rgba(30, 64, 175, 0.2);
}
.post-card a { text-decoration: none; color: inherit; }
.post-card h2 {
  font-family: 'Merriweather', Georgia, serif;
  font-size: 18px;
  font-weight: 700;
  margin-bottom: var(--space-1);
  color: var(--text-primary);
  line-height: 1.35;
}
.card-meta {
  display: flex;
  gap: var(--space-1);
  font-size: 13px;
  color: var(--text-muted);
  margin-bottom: var(--space-1);
}
.post-card p {
  font-size: 14px;
  color: var(--text-secondary);
  line-height: 1.6;
  display: -webkit-box;
  -webkit-line-clamp: 3;
  -webkit-box-orient: vertical;
  overflow: hidden;
}

.pagination {
  display: flex;
  justify-content: center;
  gap: 4px;
  margin-top: var(--space-8);
  flex-wrap: wrap;
}
.pagination a, .pagination span {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-width: 36px;
  height: 36px;
  padding: 0 8px;
  border-radius: var(--radius-sm);
  font-size: 14px;
  font-weight: 500;
  text-decoration: none;
  color: var(--text-secondary);
  border: 1px solid var(--border);
  transition: all 0.2s;
}
.pagination a:hover { border-color: var(--brand); color: var(--brand); }
.page-current { background: var(--brand); color: #fff !important; border-color: var(--brand) !important; }

.site-footer {
  border-top: 1px solid var(--border);
  background: var(--surface-alt);
  padding: var(--space-8) var(--space-5) var(--space-5);
  margin-top: var(--space-8);
}
.footer-grid {
  max-width: 760px;
  margin: 0 auto var(--space-5);
  display: grid;
  grid-template-columns: 2fr 1fr 1fr;
  gap: var(--space-5);
}
.footer-col h4 { font-size: 14px; font-weight: 700; margin-bottom: var(--space-2); color: var(--text-primary); }
.footer-col p { font-size: 14px; color: var(--text-secondary); line-height: 1.6; }
.footer-col a { display: block; font-size: 14px; color: var(--text-secondary); text-decoration: none; margin-bottom: 6px; }
.footer-col a:hover { color: var(--brand); }
.footer-copy { text-align: center; font-size: 13px; color: var(--text-muted); }

.email-capture {
  margin-top: var(--space-8);
  padding: var(--space-5);
  background: linear-gradient(135deg, var(--brand) 0%, var(--brand-dark) 100%);
  border-radius: var(--radius-lg);
  text-align: center;
  color: #fff;
}
.email-capture h3 { font-size: 22px; font-weight: 700; margin-bottom: var(--space-1); }
.email-capture p { font-size: 15px; opacity: 0.9; margin-bottom: var(--space-3); }
.email-form { display: flex; gap: var(--space-1); max-width: 440px; margin: 0 auto; }
.email-form input {
  flex: 1;
  padding: 12px 16px;
  border: none;
  border-radius: var(--radius-sm);
  font-size: 15px;
  outline: none;
}
.email-form button {
  padding: 12px 24px;
  background: var(--accent);
  color: #000;
  border: none;
  border-radius: var(--radius-sm);
  font-size: 15px;
  font-weight: 700;
  cursor: pointer;
  white-space: nowrap;
  transition: background 0.2s;
}
.email-form button:hover { background: #d97706; }
.email-privacy { font-size: 12px; opacity: 0.7; margin-top: var(--space-1); }

.popup-overlay {
  position: fixed;
  inset: 0;
  background: rgba(0,0,0,0.5);
  z-index: 9999;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: var(--space-3);
}
.popup-box {
  background: #fff;
  border-radius: var(--radius-lg);
  padding: var(--space-5);
  max-width: 460px;
  width: 100%;
  position: relative;
  text-align: center;
  box-shadow: 0 20px 60px rgba(0,0,0,0.2);
}
.popup-box h3 { font-size: 24px; font-weight: 700; margin-bottom: var(--space-1); color: var(--text-primary); }
.popup-box p { font-size: 15px; color: var(--text-secondary); margin-bottom: var(--space-3); line-height: 1.6; }
.popup-box .email-form input { border: 2px solid var(--border); }
.popup-box .email-form input:focus { border-color: var(--brand); }
.popup-box .email-privacy { color: var(--text-muted); }
.popup-close {
  position: absolute;
  top: 12px;
  right: 16px;
  background: none;
  border: none;
  font-size: 28px;
  cursor: pointer;
  color: var(--text-muted);
  line-height: 1;
}
.popup-close:hover { color: var(--text-primary); }

.affiliate-section {
  margin-top: var(--space-5);
  padding: var(--space-3);
  background: var(--surface-alt);
  border-radius: var(--radius-lg);
  border: 1px solid var(--border);
}
.affiliate-section h3 {
  font-family: 'Inter', sans-serif;
  font-size: 22px;
  font-weight: 700;
  margin-bottom: var(--space-1);
  color: var(--text-primary);
}
.affiliate-disclosure {
  font-size: 12px;
  color: var(--text-muted);
  margin-bottom: var(--space-3);
  font-style: italic;
}
.affiliate-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: var(--space-2); }
.affiliate-card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  padding: var(--space-2);
  display: flex;
  flex-direction: column;
  gap: 6px;
  transition: all 0.2s;
  position: relative;
}
.affiliate-card:hover { border-color: var(--brand); box-shadow: 0 4px 16px rgba(0,0,0,0.06); }
.affiliate-tag {
  display: inline-block;
  font-size: 11px;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  color: var(--brand);
  background: var(--brand-light);
  padding: 2px 8px;
  border-radius: 100px;
  align-self: flex-start;
}
.affiliate-card h4 { font-size: 15px; font-weight: 700; color: var(--text-primary); line-height: 1.3; }
.affiliate-rating { font-size: 14px; color: var(--accent); font-weight: 600; }
.affiliate-features { font-size: 13px; color: var(--text-secondary); line-height: 1.5; flex: 1; }
.affiliate-price { font-size: 18px; font-weight: 700; color: var(--text-primary); }
.affiliate-btn {
  display: inline-block;
  text-align: center;
  padding: 10px 16px;
  background: var(--accent);
  color: #000;
  font-size: 14px;
  font-weight: 700;
  border-radius: var(--radius-sm);
  text-decoration: none;
  transition: background 0.2s;
}
.affiliate-btn:hover { background: #d97706; }

@media (max-width: 768px) {
  .content { padding: var(--space-3) var(--space-2); }
  .post-header h1 { font-size: 26px; }
  .index-title { font-size: 26px; }
  .hero h1 { font-size: 28px; }
  .hero { padding: var(--space-5) var(--space-3); }
  .nav-toggle { display: block; }
  .nav-links { display: none; position: absolute; top: 100%; left: 0; right: 0; background: #fff; flex-direction: column; padding: var(--space-2); border-bottom: 1px solid var(--border); box-shadow: 0 8px 16px rgba(0,0,0,0.08); }
  .nav-links.open { display: flex; }
  .related-grid { grid-template-columns: 1fr; }
  .footer-grid { grid-template-columns: 1fr; gap: var(--space-3); }
  .post-body { font-size: 16px; }
  .email-form { flex-direction: column; }
  .email-form button { width: 100%; }
  .affiliate-grid { grid-template-columns: 1fr; }
}