:root {
  color-scheme: dark;
  --seo-bg: #0b1220;
  --seo-text: #e2e8f0;
  --seo-muted: #b6c3d7;
  --seo-soft: #94a3b8;
  --seo-line: rgba(148, 163, 184, 0.22);
  --seo-card: rgba(15, 23, 42, 0.72);
  --seo-blue: #60a5fa;
  --seo-blue-strong: #2563eb;
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  min-height: 100vh;
  background:
    radial-gradient(900px 520px at 12% -8%, rgba(14, 165, 233, 0.18), transparent 62%),
    radial-gradient(760px 480px at 90% 100%, rgba(34, 197, 94, 0.13), transparent 60%),
    var(--seo-bg);
  color: var(--seo-text);
  font-family: var(--font-main, 'Inter', system-ui, sans-serif);
  line-height: 1.6;
}

a {
  color: #93c5fd;
}

.seo-page {
  max-width: 1060px;
  margin: 0 auto;
  padding: 34px 24px 76px;
}

.seo-nav,
.seo-footer {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 18px;
  color: var(--seo-soft);
  font-size: 0.94rem;
}

.seo-nav a,
.seo-footer a {
  color: var(--seo-muted);
  text-decoration: none;
}

.seo-brand {
  font-weight: 800;
  color: #ffffff;
}

.seo-hero {
  padding: 74px 0 54px;
  max-width: 840px;
}

.seo-kicker {
  margin: 0 0 14px;
  color: #86efac;
  font-size: 0.82rem;
  font-weight: 800;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

h1 {
  margin: 0 0 18px;
  color: #ffffff;
  font-size: clamp(2.35rem, 6vw, 4.8rem);
  font-weight: 900;
  line-height: 0.98;
  letter-spacing: 0;
}

.seo-lead {
  max-width: 740px;
  margin: 0;
  color: #d3deef;
  font-size: clamp(1.08rem, 2vw, 1.28rem);
}

.seo-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 32px;
}

.seo-button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 48px;
  padding: 12px 20px;
  border: 1px solid var(--seo-line);
  border-radius: 999px;
  color: #ffffff;
  font-weight: 800;
  text-decoration: none;
}

.seo-button--primary {
  border-color: transparent;
  background: linear-gradient(135deg, var(--seo-blue), var(--seo-blue-strong));
  box-shadow: 0 18px 34px rgba(37, 99, 235, 0.34);
}

.seo-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 16px;
  margin: 18px 0 46px;
}

.seo-card {
  min-height: 100%;
  padding: 22px;
  border: 1px solid var(--seo-line);
  border-radius: 8px;
  background: var(--seo-card);
}

.seo-card h2,
.seo-card h3 {
  margin: 0 0 10px;
  color: #ffffff;
  font-size: 1.08rem;
  line-height: 1.25;
}

.seo-card p,
.seo-card li {
  color: var(--seo-muted);
}

.seo-card p {
  margin: 0;
}

.seo-section {
  margin: 48px 0;
}

.seo-section h2 {
  margin: 0 0 14px;
  color: #ffffff;
  font-size: clamp(1.6rem, 3vw, 2.2rem);
  line-height: 1.12;
}

.seo-section p {
  max-width: 780px;
  color: var(--seo-muted);
}

.seo-list {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 10px 18px;
  padding: 0;
  list-style: none;
}

.seo-list li {
  padding: 13px 14px;
  border: 1px solid var(--seo-line);
  border-radius: 8px;
  background: rgba(15, 23, 42, 0.48);
  color: #dbeafe;
}

.seo-related {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin-top: 18px;
}

.seo-related a {
  padding: 9px 12px;
  border: 1px solid var(--seo-line);
  border-radius: 999px;
  color: #dbeafe;
  text-decoration: none;
}

.seo-footer {
  padding-top: 32px;
  border-top: 1px solid var(--seo-line);
}

@media (max-width: 760px) {
  .seo-page {
    padding-inline: 18px;
  }

  .seo-nav,
  .seo-footer {
    align-items: flex-start;
    flex-direction: column;
  }

  .seo-hero {
    padding-top: 54px;
  }

  .seo-grid,
  .seo-list {
    grid-template-columns: 1fr;
  }
}