* {
  box-sizing: border-box;
}

body {
  margin: 0;
  color: #e5edf8;
  background:
    radial-gradient(circle at 12% 10%, rgba(0, 212, 170, 0.2), transparent 32%),
    radial-gradient(circle at 82% 18%, rgba(22, 93, 255, 0.16), transparent 30%),
    linear-gradient(135deg, #07111d 0%, #111827 60%, #08111d 100%);
  font-family: system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  line-height: 1.75;
}

a {
  color: inherit;
}

.seo-page {
  min-height: 100vh;
}

.seo-nav {
  position: sticky;
  top: 0;
  z-index: 10;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 20px;
  padding: 18px clamp(20px, 5vw, 72px);
  border-bottom: 1px solid rgba(148, 163, 184, 0.16);
  background: rgba(7, 17, 29, 0.86);
  backdrop-filter: blur(18px);
}

.seo-brand {
  color: #fff;
  font-size: 18px;
  font-weight: 900;
  text-decoration: none;
}

.seo-nav-links {
  display: flex;
  flex-wrap: wrap;
  gap: 10px 18px;
}

.seo-nav-links a {
  color: #cbd5e1;
  font-size: 14px;
  font-weight: 700;
  text-decoration: none;
}

.seo-nav-links a:hover {
  color: #5eead4;
}

.seo-hero,
.seo-section,
.seo-footer {
  width: min(1120px, calc(100% - 40px));
  margin: 0 auto;
}

.seo-hero {
  padding: 86px 0 58px;
}

.seo-kicker {
  display: inline-flex;
  min-height: 30px;
  align-items: center;
  padding: 0 12px;
  border: 1px solid rgba(94, 234, 212, 0.28);
  border-radius: 999px;
  color: #5eead4;
  background: rgba(94, 234, 212, 0.1);
  font-size: 12px;
  font-weight: 900;
  letter-spacing: 0.12em;
}

.seo-hero h1 {
  max-width: 860px;
  margin: 24px 0 0;
  color: #fff;
  font-size: clamp(38px, 7vw, 72px);
  line-height: 1.05;
  letter-spacing: 0;
}

.seo-lead {
  max-width: 860px;
  margin: 24px 0 0;
  color: #cbd5e1;
  font-size: 19px;
}

.seo-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 30px;
}

.seo-btn {
  min-height: 46px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 0 18px;
  border-radius: 8px;
  color: #07111d;
  background: linear-gradient(135deg, #00d4aa, #5eead4 55%, #fbbf24);
  font-size: 15px;
  font-weight: 900;
  text-decoration: none;
}

.seo-btn.secondary {
  border: 1px solid rgba(203, 213, 225, 0.26);
  color: #e5edf8;
  background: rgba(15, 23, 42, 0.7);
}

.seo-section {
  padding: 42px 0;
}

.seo-section h2 {
  margin: 0;
  color: #f8fafc;
  font-size: clamp(26px, 4vw, 40px);
  line-height: 1.25;
}

.seo-section p {
  max-width: 860px;
  color: #bfccdc;
}

.seo-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 16px;
  margin-top: 22px;
}

.seo-card {
  min-height: 168px;
  padding: 20px;
  border: 1px solid rgba(148, 163, 184, 0.18);
  border-radius: 8px;
  background:
    linear-gradient(140deg, rgba(15, 23, 42, 0.9), rgba(17, 24, 39, 0.7)),
    linear-gradient(180deg, rgba(94, 234, 212, 0.08), transparent);
}

.seo-card h3 {
  margin: 0;
  color: #fff;
  font-size: 20px;
}

.seo-card p,
.seo-card li {
  color: #aab7c7;
  font-size: 15px;
}

.seo-card ul,
.seo-list {
  margin: 12px 0 0;
  padding-left: 20px;
}

.seo-note {
  margin-top: 22px;
  padding: 18px 20px;
  border: 1px solid rgba(251, 191, 36, 0.32);
  border-radius: 8px;
  color: #fde68a;
  background: rgba(251, 191, 36, 0.08);
}

.seo-footer {
  padding: 42px 0 64px;
  color: #94a3b8;
  font-size: 14px;
}

@media (max-width: 820px) {
  .seo-nav {
    align-items: flex-start;
    flex-direction: column;
  }

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

  .seo-hero {
    padding-top: 56px;
  }
}