:root {
  --seo-ink: #122335;
  --seo-muted: #536473;
  --seo-line: #dce5e8;
  --seo-soft: #f4f8f7;
  --seo-teal: #087e77;
  --seo-teal-dark: #075d59;
  --seo-coral: #e86452;
  --seo-warn: #8a5a19;
}

.seo-hero {
  padding: clamp(3.5rem, 8vw, 6.5rem) 0 3rem;
  background: linear-gradient(145deg, #edf8f5 0%, #fff 58%, #fff7f1 100%);
  border-bottom: 1px solid var(--seo-line);
}

.seo-shell {
  width: min(1120px, calc(100% - 2rem));
  margin: 0 auto;
}

.seo-breadcrumbs {
  display: flex;
  flex-wrap: wrap;
  gap: .45rem;
  align-items: center;
  margin-bottom: 1.25rem;
  color: var(--seo-muted);
  font-size: .84rem;
}

.seo-breadcrumbs a { color: var(--seo-teal-dark); }

.seo-kicker {
  margin: 0 0 .8rem;
  color: var(--seo-teal-dark);
  font-size: .78rem;
  font-weight: 800;
  letter-spacing: .09em;
  text-transform: uppercase;
}

.seo-hero h1 {
  max-width: 900px;
  margin: 0;
  color: var(--seo-ink);
  font-size: clamp(2.15rem, 5vw, 4.5rem);
  line-height: 1.02;
  letter-spacing: -.045em;
}

.seo-deck {
  max-width: 780px;
  margin: 1.15rem 0 0;
  color: var(--seo-muted);
  font-size: clamp(1.05rem, 2vw, 1.28rem);
  line-height: 1.65;
}

.seo-meta {
  display: flex;
  flex-wrap: wrap;
  gap: .7rem 1.15rem;
  align-items: center;
  margin-top: 1.4rem;
  color: var(--seo-muted);
  font-size: .83rem;
}

.seo-status {
  display: inline-flex;
  gap: .4rem;
  align-items: center;
  padding: .38rem .65rem;
  border: 1px solid #e6ca9f;
  border-radius: 999px;
  background: #fff7e9;
  color: var(--seo-warn);
  font-weight: 700;
}

.seo-status.reviewed {
  border-color: #acd8cc;
  background: #ebf8f4;
  color: var(--seo-teal-dark);
}

.seo-layout {
  display: grid;
  grid-template-columns: minmax(0, 760px) minmax(240px, 300px);
  gap: clamp(2rem, 5vw, 4.5rem);
  padding: clamp(2.5rem, 6vw, 5rem) 0;
}

.seo-article {
  color: var(--seo-ink);
  font-size: 1.03rem;
  line-height: 1.82;
}

.seo-article > :first-child { margin-top: 0; }
.seo-article h2 {
  margin: 2.7rem 0 .8rem;
  color: var(--seo-ink);
  font-size: clamp(1.55rem, 3vw, 2.15rem);
  line-height: 1.18;
  letter-spacing: -.025em;
}
.seo-article h3 {
  margin: 2rem 0 .6rem;
  color: var(--seo-ink);
  font-size: 1.25rem;
}
.seo-article p { margin: 0 0 1.15rem; }
.seo-article ul, .seo-article ol { margin: 0 0 1.25rem; padding-left: 1.25rem; }
.seo-article li { margin: .45rem 0; }
.seo-article a { color: var(--seo-teal-dark); text-decoration-thickness: .08em; text-underline-offset: .16em; }

.seo-summary,
.seo-note,
.seo-sources,
.seo-faq,
.seo-review-note {
  margin: 1.6rem 0;
  padding: 1.2rem 1.35rem;
  border: 1px solid var(--seo-line);
  border-radius: 16px;
  background: var(--seo-soft);
}

.seo-summary strong,
.seo-note strong { color: var(--seo-teal-dark); }

.seo-note {
  border-left: 4px solid var(--seo-teal);
  background: #f0faf7;
}

.seo-warning {
  border-left-color: #d39032;
  background: #fff8eb;
}

.seo-table-wrap { overflow-x: auto; margin: 1.4rem 0; }
.seo-table {
  width: 100%;
  border-collapse: collapse;
  border: 1px solid var(--seo-line);
  background: #fff;
  font-size: .94rem;
}
.seo-table th, .seo-table td { padding: .8rem .9rem; border-bottom: 1px solid var(--seo-line); text-align: left; vertical-align: top; }
.seo-table th { background: var(--seo-soft); color: var(--seo-ink); }

.seo-cta {
  margin: 2rem 0;
  padding: clamp(1.35rem, 4vw, 2rem);
  border-radius: 20px;
  background: #0a5f5b;
  color: #fff;
  box-shadow: 0 18px 45px rgba(7, 65, 62, .14);
}
.seo-cta h2, .seo-cta h3 { margin: 0 0 .5rem; color: #fff; }
.seo-cta p { margin: 0 0 1rem; color: #e7f4f2; }
.seo-cta-actions { display: flex; flex-wrap: wrap; gap: .75rem; }
.seo-cta .btn-primary { background: #fff; color: var(--seo-teal-dark); }
.seo-cta .btn-outline { border-color: rgba(255,255,255,.55); color: #fff; }

.seo-sidebar { align-self: start; position: sticky; top: 5.8rem; }
.seo-side-card {
  margin-bottom: 1rem;
  padding: 1.15rem;
  border: 1px solid var(--seo-line);
  border-radius: 15px;
  background: #fff;
}
.seo-side-card h2, .seo-side-card h3 { margin: 0 0 .65rem; font-size: 1rem; color: var(--seo-ink); }
.seo-side-card ul { margin: 0; padding-left: 1rem; color: var(--seo-muted); font-size: .9rem; line-height: 1.55; }
.seo-side-card li + li { margin-top: .5rem; }
.seo-side-card a { color: var(--seo-teal-dark); }

.seo-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1rem;
  margin: 2rem 0;
}
.seo-card {
  display: flex;
  min-height: 100%;
  flex-direction: column;
  padding: 1.35rem;
  border: 1px solid var(--seo-line);
  border-radius: 18px;
  background: #fff;
  color: inherit;
  text-decoration: none;
  transition: transform .18s ease, box-shadow .18s ease, border-color .18s ease;
}
.seo-card:hover { transform: translateY(-3px); border-color: #a7d1c8; box-shadow: 0 14px 34px rgba(14, 65, 62, .09); }
.seo-card h2, .seo-card h3 { margin: 0 0 .65rem; color: var(--seo-ink); font-size: 1.22rem; line-height: 1.3; }
.seo-card p { margin: 0 0 1rem; color: var(--seo-muted); line-height: 1.62; }
.seo-card span { margin-top: auto; color: var(--seo-teal-dark); font-weight: 800; }

.organic-pathways {
  margin: 1.5rem auto 3rem;
  padding: 1.35rem;
  border: 1px solid var(--seo-line);
  border-radius: 18px;
  background: linear-gradient(135deg, #f1f9f7, #fffaf5);
}
.organic-pathways h2 { margin: 0 0 .45rem; font-size: 1.35rem; }
.organic-pathways p { margin: 0 0 .9rem; color: var(--seo-muted); }
.organic-pathways-links { display: flex; flex-wrap: wrap; gap: .55rem; }
.organic-pathways-links a {
  padding: .55rem .75rem;
  border: 1px solid #badbd4;
  border-radius: 999px;
  background: #fff;
  color: var(--seo-teal-dark);
  font-size: .84rem;
  font-weight: 750;
  text-decoration: none;
}

.seo-home-library {
  padding: 4.5rem 0;
  border-top: 1px solid var(--seo-line);
  background: #f8fbfa;
}
.seo-home-library-head { display: flex; justify-content: space-between; gap: 1rem; align-items: end; margin-bottom: 1.5rem; }
.seo-home-library-head h2 { margin: 0; }
.seo-home-library-head p { margin: .35rem 0 0; color: var(--seo-muted); }

.seo-sources ol { margin-bottom: 0; }
.seo-sources li + li { margin-top: .65rem; }
.seo-sources small { display: block; color: var(--seo-muted); }

@media (max-width: 860px) {
  .seo-layout { grid-template-columns: 1fr; }
  .seo-sidebar { position: static; }
}

@media (max-width: 620px) {
  .seo-shell { width: min(100% - 1.25rem, 1120px); }
  .seo-grid { grid-template-columns: 1fr; }
  .seo-home-library-head { align-items: flex-start; flex-direction: column; }
  .seo-cta-actions { flex-direction: column; }
  .seo-cta-actions .btn { width: 100%; justify-content: center; }
}