:root {
  --bg: #f8fafc;
  --surface: #ffffff;
  --ink: #0f172a;
  --body: #475569;
  --muted: #94a3b8;
  --line: #e2e8f0;
  --line-soft: #f1f5f9;
  --brand: #1e3a5f;
  --brand-alt: #1e40af;
  --link: #60a5fa;
  --link-ink: #2563eb;
  --accent: #10b981;
  --accent-bg: #d1fae5;
  --warn-bg: #fefce8;
  --warn-border: #fde68a;
  --warn-ink: #713f12;
}

* { margin: 0; padding: 0; box-sizing: border-box; }
html, body { background: var(--bg); }
body {
  font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
  color: var(--body);
  line-height: 1.7;
  font-size: 16px;
  -webkit-font-smoothing: antialiased;
}
img { max-width: 100%; height: auto; }

/* Sticky top bar */
.topbar {
  position: sticky;
  top: 0;
  z-index: 20;
  background: var(--brand);
  color: #fff;
  padding: 12px 20px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  box-shadow: 0 1px 0 rgba(0, 0, 0, 0.05);
}
.topbar .brand {
  color: #fff;
  text-decoration: none;
  font-weight: 800;
  font-size: 15px;
  letter-spacing: 0.2px;
}
.topbar .cta-link {
  background: #fff;
  color: var(--brand);
  text-decoration: none;
  font-weight: 700;
  font-size: 13px;
  padding: 8px 14px;
  border-radius: 8px;
  white-space: nowrap;
}
.topbar .cta-link:hover { background: #e2e8f0; }

/* Main article layout */
main.article {
  max-width: 720px;
  margin: 0 auto;
  padding: 28px 22px 56px;
}
main.article h1 {
  font-size: 30px;
  line-height: 1.2;
  font-weight: 800;
  color: var(--ink);
  margin: 10px 0 6px;
}
main.article p.updated {
  color: var(--muted);
  font-size: 13px;
  margin-bottom: 24px;
}
main.article h2 {
  font-size: 22px;
  line-height: 1.3;
  font-weight: 800;
  color: var(--ink);
  margin: 32px 0 10px;
  padding-top: 4px;
}
main.article h3 {
  font-size: 17px;
  line-height: 1.35;
  font-weight: 700;
  color: var(--ink);
  margin: 22px 0 8px;
}
main.article p {
  color: var(--body);
  margin: 0 0 14px;
}
main.article ul,
main.article ol {
  color: var(--body);
  margin: 0 0 18px;
  padding-left: 22px;
}
main.article li { margin: 0 0 8px; }
main.article strong { color: var(--ink); }
main.article a {
  color: var(--link-ink);
  text-decoration: underline;
  text-underline-offset: 2px;
}
main.article a:hover { color: var(--brand-alt); }
main.article hr {
  border: none;
  border-top: 1px solid var(--line);
  margin: 32px 0;
}

/* FTC disclosure + medical disclaimer */
.disclosure {
  background: var(--warn-bg);
  border: 1px solid var(--warn-border);
  color: var(--warn-ink);
  font-size: 13px;
  line-height: 1.55;
  padding: 10px 14px;
  border-radius: 10px;
  margin: 0 0 22px;
}
.disclaimer {
  margin-top: 36px;
  padding: 14px 16px;
  background: var(--line-soft);
  border-radius: 10px;
  color: var(--muted);
  font-size: 12px;
  line-height: 1.65;
}
.disclaimer strong { color: #64748b; }

/* Tables */
main.article table {
  width: 100%;
  border-collapse: collapse;
  margin: 18px 0;
  font-size: 14px;
  line-height: 1.5;
  box-shadow: 0 1px 3px rgba(0, 0, 0, 0.04);
  border-radius: 10px;
  overflow: hidden;
  background: var(--surface);
}
main.article thead th {
  text-align: left;
  padding: 10px 12px;
  background: var(--brand);
  color: #fff;
  font-weight: 700;
  font-size: 13px;
  border-bottom: 1px solid var(--brand-alt);
}
main.article tbody td {
  padding: 10px 12px;
  border-bottom: 1px solid var(--line);
  vertical-align: top;
  color: var(--body);
}
main.article tbody tr:nth-child(even) td {
  background: #f8fafc;
}
main.article tbody tr:last-child td { border-bottom: none; }
main.article td.best {
  background: var(--accent-bg);
  color: #065f46;
  font-weight: 700;
}
main.article td.strong { color: var(--ink); font-weight: 700; }

/* CTA block */
.cta-block {
  margin: 36px 0 20px;
  padding: 22px 22px 24px;
  background: linear-gradient(135deg, var(--brand), var(--brand-alt));
  color: #fff;
  border-radius: 16px;
  text-align: center;
}
.cta-block h2 {
  color: #fff !important;
  font-size: 20px !important;
  margin: 0 0 8px !important;
}
.cta-block p {
  color: #dbeafe !important;
  font-size: 14px !important;
  margin: 0 0 14px !important;
}
.cta-block a.cta-button {
  display: inline-block;
  background: #fff;
  color: var(--brand);
  padding: 12px 22px;
  border-radius: 10px;
  font-weight: 800;
  font-size: 14px;
  text-decoration: none;
  box-shadow: 0 4px 12px rgba(0, 0, 0, 0.18);
}
.cta-block a.cta-button:hover { background: #f8fafc; }

/* Related articles list (used on index + inline cross-links) */
.related {
  margin: 28px 0;
  padding: 16px 18px;
  background: #fff;
  border: 1px solid var(--line);
  border-radius: 12px;
}
.related h3 {
  margin: 0 0 10px !important;
  font-size: 14px !important;
  color: var(--muted) !important;
  text-transform: uppercase;
  letter-spacing: 0.8px;
  font-weight: 700 !important;
}
.related ul { margin: 0; padding-left: 18px; }
.related li { margin: 0 0 14px; }
.related li:last-child { margin-bottom: 0; }
.related li a { font-weight: 600; }
.related li p.desc { margin: 4px 0 0; font-size: 13px; line-height: 1.5; color: var(--body); }

.midcta {
  margin: 28px 0;
  padding: 18px 20px 20px;
  background: linear-gradient(135deg, #eff6ff, #dbeafe);
  border: 1px solid #bfdbfe;
  border-radius: 12px;
  text-align: center;
}
.midcta p.heading {
  margin: 0 0 4px;
  font-weight: 800;
  color: var(--brand);
  font-size: 16px;
}
.midcta p.sub {
  margin: 0 0 14px;
  color: var(--body);
  font-size: 14px;
}
.midcta a.btn {
  display: inline-block;
  background: linear-gradient(135deg, var(--brand), var(--brand-alt));
  color: #fff !important;
  padding: 10px 22px;
  border-radius: 8px;
  font-weight: 700;
  font-size: 14px;
  text-decoration: none !important;
  box-shadow: 0 2px 8px rgba(30, 58, 95, 0.2);
}
.midcta a.btn:hover { background: var(--brand-alt); }

/* Index page: category cards */
.index-hero { text-align: center; margin: 8px 0 28px; }
.index-hero p { font-size: 15px; color: var(--body); max-width: 560px; margin: 0 auto; }

.category {
  background: #fff;
  border: 1px solid var(--line);
  border-radius: 14px;
  padding: 20px 22px;
  margin: 0 0 18px;
}
.category h2 {
  margin: 0 0 14px !important;
  font-size: 18px !important;
  color: var(--brand) !important;
}
.category ol,
.category ul {
  list-style: none;
  padding-left: 0;
  margin: 0;
}
.category li { margin: 0 0 14px; }
.category li:last-child { margin-bottom: 0; }
.category li a.article-link {
  font-weight: 700;
  font-size: 15px;
  color: var(--ink);
  text-decoration: none;
  display: block;
  margin-bottom: 3px;
}
.category li a.article-link:hover { color: var(--link-ink); text-decoration: underline; }
.category li .desc {
  font-size: 13px;
  color: var(--body);
  margin: 0;
}

/* Footer */
footer.sitefooter {
  margin: 40px auto 0;
  max-width: 720px;
  padding: 22px 22px 36px;
  border-top: 1px solid var(--line);
  text-align: center;
}
footer.sitefooter p {
  font-size: 11px;
  color: var(--muted);
  margin: 0 0 8px;
  line-height: 1.7;
}
footer.sitefooter a {
  color: var(--muted);
  text-decoration: underline;
}
footer.sitefooter a:hover { color: var(--body); }
footer.sitefooter p.affiliate {
  font-size: 10px;
  color: var(--muted);
  max-width: 540px;
  margin: 8px auto 0;
}

/* Responsive */
@media (max-width: 600px) {
  main.article { padding: 22px 16px 44px; }
  main.article h1 { font-size: 25px; }
  main.article h2 { font-size: 19px; }
  main.article table { font-size: 13px; }
  main.article thead th,
  main.article tbody td { padding: 8px 10px; }
  .topbar { padding: 10px 14px; }
  .topbar .brand { font-size: 14px; }
  .topbar .cta-link { padding: 7px 11px; font-size: 12px; }
  .cta-block { padding: 18px 16px 20px; margin: 28px 0 16px; }
}