:root {
  --green-950: #05251c;
  --green-900: #0a3528;
  --green-800: #104b39;
  --green-700: #176447;
  --green-100: #e8f6ef;
  --green-50: #f5fbf8;
  --ink: #07110d;
  --muted: #607168;
  --line: rgba(10, 53, 40, 0.14);
  --yellow: #ffe04f;
  font-family: Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  background: #fff;
  color: var(--ink);
  margin: 0;
}

a {
  color: inherit;
}

.seo-header {
  align-items: center;
  background: rgba(255, 255, 255, 0.94);
  border-bottom: 1px solid var(--line);
  display: flex;
  gap: 1rem;
  justify-content: space-between;
  min-height: 92px;
  padding: 0 6vw;
  position: sticky;
  top: 0;
  z-index: 10;
}

.seo-brand img {
  display: block;
  width: clamp(150px, 14vw, 220px);
}

.seo-nav {
  align-items: center;
  display: flex;
  flex-wrap: wrap;
  gap: 0.45rem;
  justify-content: flex-end;
}

.seo-nav a,
.button {
  align-items: center;
  border-radius: 8px;
  display: inline-flex;
  font-weight: 850;
  min-height: 44px;
  padding: 0.7rem 0.95rem;
  text-decoration: none;
}

.seo-nav a {
  color: var(--green-900);
}

.button {
  background: var(--green-800);
  color: #fff;
}

.button-secondary {
  background: #fff;
  border: 1px solid var(--line);
  color: var(--green-900);
}

.seo-hero {
  background:
    radial-gradient(circle at 82% 15%, rgba(255, 224, 79, 0.28), transparent 25rem),
    linear-gradient(135deg, var(--green-950), var(--green-800));
  color: #fff;
  padding: clamp(4rem, 9vw, 7rem) 6vw;
}

.seo-hero-grid {
  align-items: center;
  display: grid;
  gap: clamp(1.5rem, 4vw, 4rem);
  grid-template-columns: minmax(0, 1.08fr) minmax(280px, 0.92fr);
  margin: 0 auto;
  max-width: 1180px;
}

.eyebrow {
  color: #bff0d7;
  font-size: 0.78rem;
  font-weight: 900;
  letter-spacing: 0.14em;
  margin: 0 0 0.75rem;
  text-transform: uppercase;
}

.seo-hero h1 {
  font-size: clamp(2.6rem, 7vw, 5.4rem);
  letter-spacing: 0;
  line-height: 0.92;
  margin: 0;
  max-width: 980px;
}

.seo-hero p {
  color: rgba(255, 255, 255, 0.78);
  font-size: clamp(1rem, 2vw, 1.25rem);
  font-weight: 650;
  line-height: 1.55;
  margin: 1.1rem 0 0;
  max-width: 720px;
}

.hero-actions,
.chip-row {
  display: flex;
  flex-wrap: wrap;
  gap: 0.65rem;
  margin-top: 1.35rem;
}

.chip-row span,
.keyword-list li {
  background: rgba(255, 255, 255, 0.12);
  border: 1px solid rgba(255, 255, 255, 0.22);
  border-radius: 999px;
  color: #effbf6;
  font-size: 0.84rem;
  font-weight: 850;
  padding: 0.46rem 0.7rem;
}

.hero-media {
  align-self: stretch;
  background: rgba(255, 255, 255, 0.08);
  border: 1px solid rgba(255, 255, 255, 0.14);
  border-radius: 8px;
  display: grid;
  min-height: 280px;
  overflow: hidden;
  padding: clamp(1rem, 3vw, 2rem);
  place-items: center;
}

.hero-media img {
  filter: drop-shadow(0 26px 38px rgba(0, 0, 0, 0.28));
  max-height: 360px;
  max-width: 100%;
  object-fit: contain;
}

.content-wrap {
  margin: 0 auto;
  max-width: 1180px;
  padding: clamp(3rem, 6vw, 5.5rem) 6vw;
}

.content-grid {
  align-items: start;
  display: grid;
  gap: 1.4rem;
  grid-template-columns: minmax(0, 1fr) minmax(280px, 0.32fr);
}

.content-main {
  display: grid;
  gap: 1rem;
}

.content-section,
.toc-card,
.faq-card,
.related-card,
.quick-card {
  background: #fff;
  border: 1px solid var(--line);
  border-radius: 8px;
  box-shadow: 0 18px 50px rgba(10, 53, 40, 0.06);
}

.content-section {
  padding: clamp(1.25rem, 3vw, 2rem);
}

.content-section h2,
.faq-section h2,
.related-section h2 {
  font-size: clamp(1.65rem, 3vw, 2.5rem);
  line-height: 1;
  margin: 0 0 1rem;
}

.content-section p,
.content-section li,
.faq-card p,
.quick-card p,
.related-card p {
  color: var(--muted);
  font-size: 1rem;
  font-weight: 620;
  line-height: 1.62;
}

.content-section ul,
.keyword-list {
  margin: 1rem 0 0;
  padding-left: 1.1rem;
}

.content-section li + li {
  margin-top: 0.5rem;
}

.sidebar {
  display: grid;
  gap: 1rem;
  position: sticky;
  top: 112px;
}

.toc-card,
.quick-card {
  padding: 1rem;
}

.toc-card h2,
.quick-card h2 {
  font-size: 1.05rem;
  margin: 0 0 0.75rem;
}

.toc-card a {
  border-top: 1px solid rgba(10, 53, 40, 0.1);
  color: var(--green-900);
  display: block;
  font-size: 0.92rem;
  font-weight: 820;
  padding: 0.72rem 0;
  text-decoration: none;
}

.quick-card strong {
  color: var(--green-900);
  display: block;
  font-size: 1.4rem;
}

.faq-section,
.related-section {
  margin-top: 1.4rem;
}

.faq-list,
.related-grid,
.hub-grid {
  display: grid;
  gap: 0.85rem;
}

.faq-card {
  padding: 1rem;
}

.faq-card h3,
.related-card h3 {
  font-size: 1.05rem;
  margin: 0 0 0.45rem;
}

.faq-card p,
.related-card p {
  margin: 0;
}

.related-grid,
.hub-grid {
  grid-template-columns: repeat(3, minmax(0, 1fr));
}

.related-card {
  display: grid;
  gap: 0.6rem;
  padding: 1rem;
  text-decoration: none;
}

.related-card span {
  color: var(--green-700);
  font-size: 0.82rem;
  font-weight: 900;
  text-transform: uppercase;
}

.keyword-list {
  display: flex;
  flex-wrap: wrap;
  gap: 0.55rem;
  list-style: none;
  padding: 0;
}

.keyword-list li {
  background: var(--green-50);
  border-color: var(--line);
  color: var(--green-900);
}

.seo-footer {
  background: var(--green-950);
  color: #dff8eb;
  padding: 2rem 6vw;
}

.seo-footer-grid {
  align-items: start;
  display: grid;
  gap: 1rem;
  grid-template-columns: minmax(0, 1fr) auto;
  margin: 0 auto;
  max-width: 1180px;
}

.seo-footer img {
  background: rgba(255, 255, 255, 0.94);
  border-radius: 8px;
  display: block;
  margin-bottom: 0.8rem;
  max-width: 180px;
  padding: 0.5rem;
}

.footer-links {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem 1rem;
  justify-content: flex-end;
}

.footer-links a {
  color: #dff8eb;
  font-weight: 800;
}

@media (max-width: 900px) {
  .seo-header {
    align-items: flex-start;
    flex-direction: column;
    padding: 1rem 5vw;
    position: static;
  }

  .seo-nav {
    justify-content: flex-start;
  }

  .seo-hero-grid,
  .content-grid,
  .seo-footer-grid {
    grid-template-columns: 1fr;
  }

  .sidebar {
    position: static;
  }

  .related-grid,
  .hub-grid {
    grid-template-columns: 1fr;
  }

  .footer-links {
    justify-content: flex-start;
  }
}

@media (max-width: 560px) {
  .seo-nav a,
  .button {
    min-height: 40px;
    padding: 0.62rem 0.72rem;
  }

  .hero-media {
    min-height: 210px;
  }

  .content-wrap {
    padding-left: 4vw;
    padding-right: 4vw;
  }
}