:root {
  --seo-bg: #050509;
  --seo-panel: rgba(15, 19, 32, 0.78);
  --seo-panel-strong: rgba(18, 23, 39, 0.94);
  --seo-border: rgba(255, 255, 255, 0.12);
  --seo-text: #f4f7fb;
  --seo-muted: #b5c0d6;
  --seo-accent: #7dd3fc;
  --seo-accent-2: #f59e0b;
  --seo-shadow: 0 24px 80px rgba(0, 0, 0, 0.34);
}

* {
  box-sizing: border-box;
}

html {
  background:
    radial-gradient(circle at top left, rgba(125, 211, 252, 0.12), transparent 34%),
    radial-gradient(circle at top right, rgba(245, 158, 11, 0.1), transparent 26%),
    linear-gradient(180deg, #050509 0%, #090d16 48%, #06080f 100%);
  color: var(--seo-text);
  font-family: Inter, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  line-height: 1.6;
}

body {
  margin: 0;
  min-height: 100vh;
}

a {
  color: inherit;
  text-decoration: none;
}

img {
  display: block;
  max-width: 100%;
}

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

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

.seo-site-header {
  position: sticky;
  top: 0;
  z-index: 20;
  backdrop-filter: blur(18px);
  background: rgba(5, 5, 9, 0.72);
  border-bottom: 1px solid var(--seo-border);
}

.seo-site-header__inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  min-height: 72px;
}

.seo-brand {
  display: inline-flex;
  align-items: center;
  gap: 0.75rem;
  font-weight: 700;
  letter-spacing: 0.03em;
}

.seo-brand img {
  border-radius: 12px;
}

.seo-site-nav {
  display: inline-flex;
  align-items: center;
  gap: 1rem;
  color: var(--seo-muted);
}

.seo-site-nav a:hover,
.seo-footer__links a:hover,
.seo-link-list a:hover {
  color: var(--seo-accent);
}

.seo-hero {
  padding: 4.5rem 0 2.25rem;
}

.seo-breadcrumbs {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
  margin-bottom: 1.25rem;
  color: var(--seo-muted);
  font-size: 0.95rem;
}

.seo-breadcrumbs__sep {
  opacity: 0.5;
}

.seo-eyebrow {
  margin: 0 0 0.75rem;
  color: var(--seo-accent);
  font-size: 0.9rem;
  font-weight: 700;
  letter-spacing: 0.18em;
  text-transform: uppercase;
}

.seo-hero h1 {
  margin: 0;
  max-width: 12ch;
  font-size: clamp(2.4rem, 5vw, 4.8rem);
  line-height: 0.98;
  letter-spacing: -0.04em;
}

.seo-summary {
  max-width: 62rem;
  margin: 1.1rem 0 0;
  color: var(--seo-muted);
  font-size: clamp(1.05rem, 1.8vw, 1.22rem);
}

.seo-key-points {
  max-width: 44rem;
  margin-top: 1.35rem;
}

.seo-key-points .seo-list {
  margin: 0;
}

.seo-list {
  padding-left: 1.2rem;
  margin: 1rem 0 0;
}

.seo-list li + li {
  margin-top: 0.5rem;
}

.seo-cta-row {
  display: flex;
  flex-wrap: wrap;
  gap: 0.9rem;
  margin-top: 1.6rem;
}

.seo-button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 48px;
  padding: 0.85rem 1.15rem;
  border-radius: 999px;
  border: 1px solid var(--seo-border);
  font-weight: 700;
}

.seo-button--primary {
  background: linear-gradient(135deg, var(--seo-accent) 0%, #60a5fa 100%);
  color: #06111c;
}

.seo-button--secondary {
  background: rgba(255, 255, 255, 0.04);
  color: var(--seo-text);
}

.seo-content {
  padding: 0 0 4rem;
}

.seo-content__grid {
  display: grid;
  grid-template-columns: minmax(0, 1.7fr) minmax(300px, 0.9fr);
  gap: 1.4rem;
}

.seo-article,
.seo-sidebar,
.seo-card,
.seo-note {
  background: var(--seo-panel);
  border: 1px solid var(--seo-border);
  border-radius: 24px;
  box-shadow: var(--seo-shadow);
}

.seo-article {
  padding: 1.5rem;
}

.seo-article--wide {
  padding: 1.5rem;
}

.seo-section + .seo-section {
  margin-top: 1.75rem;
  padding-top: 1.75rem;
  border-top: 1px solid rgba(255, 255, 255, 0.08);
}

.seo-section h2,
.seo-note h2,
.seo-faq__item h3 {
  margin: 0 0 0.7rem;
  line-height: 1.15;
}

.seo-section p,
.seo-note p,
.seo-card span {
  margin: 0.8rem 0 0;
  color: var(--seo-muted);
}

.seo-sidebar {
  display: grid;
  gap: 1rem;
  background: transparent;
  border: 0;
  box-shadow: none;
}

.seo-note {
  padding: 1.2rem;
  background: var(--seo-panel-strong);
}

.seo-link-list {
  padding-left: 1.1rem;
  margin: 0.75rem 0 0;
  color: var(--seo-muted);
}

.seo-link-list li + li {
  margin-top: 0.45rem;
}

.seo-card-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1rem;
}

.seo-card-grid--compact {
  margin-top: 1rem;
}

.seo-card {
  display: block;
  padding: 1.15rem;
  transition: transform 140ms ease, border-color 140ms ease, background 140ms ease;
}

.seo-card:hover {
  transform: translateY(-2px);
  border-color: rgba(125, 211, 252, 0.45);
  background: rgba(18, 23, 39, 0.96);
}

.seo-card__eyebrow {
  display: inline-block;
  color: var(--seo-accent-2);
  font-size: 0.82rem;
  font-weight: 700;
  letter-spacing: 0.12em;
  text-transform: uppercase;
}

.seo-card strong {
  display: block;
  margin-top: 0.5rem;
  font-size: 1.05rem;
  line-height: 1.25;
}

.seo-faq {
  display: grid;
  gap: 1rem;
}

.seo-faq__item {
  padding: 1rem 1.05rem;
  border-radius: 18px;
  border: 1px solid rgba(255, 255, 255, 0.08);
  background: rgba(255, 255, 255, 0.03);
}

.seo-footer {
  padding: 0 0 3rem;
}

.seo-footer__lead {
  margin: 0;
  font-weight: 700;
}

.seo-footer__copy {
  margin: 0.7rem 0 0;
  color: var(--seo-muted);
}

.seo-footer__links {
  display: flex;
  flex-wrap: wrap;
  gap: 1rem;
  margin-top: 1rem;
  color: var(--seo-muted);
}

@media (max-width: 920px) {
  .seo-content__grid {
    grid-template-columns: 1fr;
  }

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

@media (max-width: 640px) {
  .seo-site-header__inner {
    min-height: auto;
    padding: 0.9rem 0;
    align-items: flex-start;
    flex-direction: column;
  }

  .seo-site-nav {
    flex-wrap: wrap;
  }

  .seo-hero {
    padding-top: 3.1rem;
  }

  .seo-article {
    padding: 1.1rem;
  }
}