:root {
  color-scheme: dark;
  --bg: #05070b;
  --panel: #0b1018;
  --panel-2: #101824;
  --text: #f5f7fb;
  --muted: #a8b1c2;
  --line: rgba(255, 255, 255, 0.12);
  --accent: #19d6a3;
  --accent-2: #73b7ff;
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font-family: Inter, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  line-height: 1.65;
}

a {
  color: var(--accent);
  text-decoration: none;
}

a:hover {
  text-decoration: underline;
}

.seo-shell {
  width: min(1080px, calc(100% - 32px));
  margin: 0 auto;
}

.seo-header {
  border-bottom: 1px solid var(--line);
  background: rgba(5, 7, 11, 0.88);
  position: sticky;
  top: 0;
  z-index: 10;
  backdrop-filter: blur(14px);
}

.seo-nav {
  min-height: 68px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
}

.seo-brand {
  color: var(--text);
  font-weight: 800;
  letter-spacing: 0;
}

.seo-links {
  display: flex;
  align-items: center;
  gap: 18px;
  flex-wrap: wrap;
}

.seo-links a {
  color: var(--muted);
  font-size: 14px;
}

.seo-hero {
  padding: 72px 0 40px;
}

.seo-kicker {
  color: var(--accent);
  font-weight: 700;
  text-transform: uppercase;
  font-size: 13px;
}

h1 {
  max-width: 860px;
  margin: 12px 0 18px;
  font-size: clamp(34px, 6vw, 64px);
  line-height: 1.05;
  letter-spacing: 0;
}

.seo-lead {
  max-width: 780px;
  color: var(--muted);
  font-size: 19px;
}

.seo-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 16px;
  margin: 34px 0;
}

.seo-card,
.seo-section {
  border: 1px solid var(--line);
  background: linear-gradient(180deg, var(--panel), rgba(11, 16, 24, 0.72));
  border-radius: 8px;
}

.seo-card {
  padding: 20px;
}

.seo-card strong {
  display: block;
  margin-bottom: 6px;
}

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

.seo-section {
  padding: 30px;
  margin: 22px 0;
}

h2 {
  margin: 0 0 14px;
  font-size: 28px;
}

h3 {
  margin: 24px 0 10px;
}

table {
  width: 100%;
  border-collapse: collapse;
  margin-top: 16px;
  overflow: hidden;
  border-radius: 8px;
}

th,
td {
  padding: 13px 14px;
  border-bottom: 1px solid var(--line);
  text-align: left;
  vertical-align: top;
}

th {
  color: var(--text);
  background: var(--panel-2);
}

.seo-cta {
  display: flex;
  gap: 14px;
  flex-wrap: wrap;
  margin-top: 26px;
}

.seo-btn {
  display: inline-flex;
  min-height: 44px;
  align-items: center;
  justify-content: center;
  padding: 0 18px;
  border-radius: 8px;
  border: 1px solid var(--line);
  color: var(--text);
  font-weight: 700;
}

.seo-btn.primary {
  background: var(--accent);
  color: #03110d;
  border-color: transparent;
}

.seo-footer {
  border-top: 1px solid var(--line);
  margin-top: 56px;
  padding: 28px 0 42px;
  color: var(--muted);
}

@media (max-width: 760px) {
  .seo-nav {
    align-items: flex-start;
    flex-direction: column;
    padding: 18px 0;
  }

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

  .seo-section {
    padding: 22px;
  }

  th,
  td {
    padding: 11px 10px;
    font-size: 14px;
  }
}