:root {
  --header-h: 68px;
  --container-max: 1180px;
  --container-px: clamp(18px, 4vw, 32px);
  --surface-canvas: #f5f3ee;
  --surface-base: #ffffff;
  --surface-muted: #faf8f4;
  --surface-code: #fbfaf7;
  --surface-header: rgba(255, 255, 255, 0.9);
  --surface-header-scrolled: rgba(255, 255, 255, 0.96);
  --color-text-primary: #1a1714;
  --color-text-secondary: #5a564e;
  --color-text-muted: #9a9590;
  --color-accent-primary: #c9a84c;
  --color-accent-primary-hover: #8a7330;
  --color-accent-primary-active: #765f25;
  --color-accent-primary-subtle: #faf5e8;
  --color-border-default: #e0dcd4;
  --color-border-subtle: #ece8e0;
  --shadow-sm: 0 1px 2px rgba(26, 23, 20, 0.04);
  --shadow-md: 0 4px 20px rgba(26, 23, 20, 0.08);
  --font: 'IBM Plex Sans', 'Rubik', -apple-system, BlinkMacSystemFont, sans-serif;
}

html {
  overflow-x: hidden;
  scroll-padding-top: calc(var(--header-h) + 20px);
}

body {
  margin: 0;
  font-family: var(--font);
  color: var(--color-text-primary);
  background: var(--surface-canvas);
  line-height: 1.65;
  -webkit-font-smoothing: antialiased;
  overflow-x: hidden;
}

.seo-main {
  background: var(--surface-base);
}

.seo-hero {
  max-width: var(--container-max);
  margin: 0 auto;
  padding: clamp(56px, 9vw, 94px) var(--container-px) clamp(36px, 7vw, 68px);
}

.seo-kicker {
  margin: 0 0 12px;
  color: var(--color-accent-primary-active);
  font-size: 12px;
  font-weight: 700;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

.seo-hero h1 {
  max-width: 820px;
  margin: 0;
  font-size: clamp(2rem, 5vw, 4rem);
  line-height: 1.05;
  font-weight: 560;
  letter-spacing: 0;
  text-wrap: balance;
}

.seo-lead {
  max-width: 780px;
  margin: 20px 0 0;
  color: var(--color-text-secondary);
  font-size: clamp(17px, 2vw, 20px);
  line-height: 1.7;
}

.seo-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 28px;
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 44px;
  padding: 0 18px;
  border-radius: 999px;
  font-weight: 600;
  font-size: 14px;
  text-decoration: none;
}

.btn:hover {
  text-decoration: none;
}

.btn-primary {
  color: #fff;
  background: var(--color-accent-primary);
  border: 1px solid var(--color-accent-primary);
}

.btn-outline {
  color: var(--color-text-primary);
  background: var(--surface-base);
  border: 1px solid var(--color-border-default);
}

.seo-grid {
  max-width: var(--container-max);
  margin: 0 auto;
  padding: 0 var(--container-px) clamp(56px, 8vw, 88px);
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 16px;
}

.seo-card {
  min-width: 0;
  padding: clamp(20px, 3vw, 28px);
  border: 1px solid var(--color-border-subtle);
  border-radius: 12px;
  background: var(--surface-muted);
}

.seo-card h2 {
  margin: 0 0 12px;
  font-size: clamp(1.2rem, 2vw, 1.55rem);
  line-height: 1.2;
  font-weight: 560;
}

.seo-card p {
  margin: 0;
  color: var(--color-text-secondary);
}

.seo-card p + p,
.seo-card ul + p,
.seo-card p + .text-link {
  margin-top: 12px;
}

.seo-card ul {
  margin: 0;
  padding-left: 1.1em;
  color: var(--color-text-secondary);
}

.seo-card li + li {
  margin-top: 8px;
}

.seo-muted {
  color: var(--color-text-muted);
  font-size: 13px;
}

code {
  padding: 2px 6px;
  border-radius: 6px;
  background: var(--surface-code);
  border: 1px solid var(--color-border-subtle);
  color: var(--color-text-primary);
  font: 600 0.92em/1.4 'JetBrains Mono', 'SF Mono', Menlo, monospace;
}

.text-link {
  display: inline-flex;
  color: var(--color-accent-primary-hover);
  font-weight: 600;
}

.lang-switcher a {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-width: 40px;
  min-height: 32px;
  border-radius: 999px;
  color: var(--color-text-muted);
  font-size: 11px;
  font-weight: 700;
  text-decoration: none;
}

.lang-switcher a:hover {
  color: var(--color-text-primary);
  background: var(--color-accent-primary-subtle);
  text-decoration: none;
}

@media (max-width: 820px) {
  .seo-grid {
    grid-template-columns: 1fr;
  }
}

@media (max-width: 640px) {
  .seo-hero {
    padding-top: 42px;
  }

  .seo-actions .btn {
    width: 100%;
  }
}