:root {
  --void: #0a0514;
  --deep: #12081f;
  --panel: rgba(26, 13, 41, 0.92);
  --panel-soft: rgba(28, 15, 44, 0.74);
  --border: rgba(64, 250, 236, 0.18);
  --border-soft: rgba(255, 255, 255, 0.07);
  --text: #ebf0fa;
  --text-primary: #ebf0fa;
  --text-muted: #8c85ad;
  --muted: var(--text-muted);
  --dim: #615a7a;
  --cyan: #40faec;
  --neon-cyan: var(--cyan);
  --magenta: #ff389e;
  --neon-magenta: var(--magenta);
  --violet: #9e61ff;
  --neon-violet: var(--violet);
  --amber: #ffc71f;
  --neon-amber: var(--amber);
  --up: #33ffb8;
  --down: #ff4773;
  --shadow: none;
  --r-md: 14px;
  --r-lg: 18px;
  --r-pill: 999px;
  --btn-radius: 6px;
  --control-height: 36px;
  --font-ui: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
  --font-mono: "SF Mono", "Menlo", "Consolas", monospace;
}

*,
*::before,
*::after {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  font-family: var(--font-ui);
  color: var(--text);
  background:
    radial-gradient(circle at top right, rgba(255, 56, 158, 0.1), transparent 28%),
    radial-gradient(circle at left center, rgba(64, 250, 236, 0.08), transparent 32%),
    linear-gradient(145deg, var(--void), var(--deep) 45%, #0d0619 100%);
  min-height: 100vh;
}

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

a:hover {
  text-decoration: underline;
}

.seo-page {
  width: min(1180px, calc(100vw - 32px));
  margin: 0 auto;
  padding: 28px 0 72px;
}

.seo-header {
  display: flex;
  flex-wrap: wrap;
  justify-content: space-between;
  align-items: center;
  gap: 16px;
  padding: 14px 18px;
  margin-bottom: 26px;
  border: 1px solid var(--border-soft);
  border-radius: var(--r-lg);
  background: rgba(19, 11, 31, 0.9);
  backdrop-filter: blur(16px) saturate(130%);
  box-shadow: none;
}

.seo-brand {
  display: flex;
  align-items: center;
  gap: 12px;
  min-width: 0;
}

.seo-brand img {
  width: 38px;
  height: 38px;
}

.seo-brand strong {
  display: block;
  font-size: 1.15rem;
}

.seo-brand span {
  color: var(--dim);
  font-size: 0.9rem;
}

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

.seo-nav a {
  padding: 8px 12px;
  min-height: var(--control-height);
  display: inline-flex;
  align-items: center;
  border: 1px solid var(--border-soft);
  border-radius: var(--btn-radius);
  background: rgba(255, 255, 255, 0.03);
  font-family: var(--font-mono);
  font-size: 0.78rem;
  font-weight: 800;
  letter-spacing: 0.02em;
  text-transform: none;
}

.seo-hero,
.seo-panel,
.seo-grid article,
.seo-faq details {
  border: 1px solid var(--border-soft);
  border-radius: var(--r-lg);
  background: var(--panel-soft);
  box-shadow: none;
  backdrop-filter: blur(20px) saturate(140%);
}

.seo-hero {
  position: relative;
  overflow: hidden;
  padding: clamp(28px, 5vw, 56px);
  margin-bottom: 24px;
}

.seo-hero::before {
  content: "";
  position: absolute;
  inset: 0;
  background:
    radial-gradient(circle at 12% 20%, rgba(64, 250, 236, 0.12), transparent 22%),
    radial-gradient(circle at 84% 18%, rgba(255, 56, 158, 0.13), transparent 24%),
    linear-gradient(135deg, rgba(255, 255, 255, 0.02), transparent 40%);
  pointer-events: none;
}

.seo-kicker {
  position: relative;
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 6px 10px;
  border-radius: var(--btn-radius);
  background: rgba(64, 250, 236, 0.09);
  border: 1px solid rgba(64, 250, 236, 0.2);
  color: var(--cyan);
  font-family: var(--font-mono);
  font-size: 0.78rem;
  font-weight: 900;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

.seo-hero h1 {
  position: relative;
  margin: 18px 0 12px;
  max-width: 11ch;
  font-size: clamp(2.6rem, 7vw, 4.9rem);
  line-height: 0.94;
}

.seo-hero p {
  position: relative;
  max-width: 68ch;
  margin: 0;
  color: var(--muted);
  font-size: clamp(1rem, 2vw, 1.18rem);
  line-height: 1.7;
}

.seo-hero__actions {
  position: relative;
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 22px;
}

.seo-btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: var(--control-height);
  padding: 0 16px;
  border-radius: var(--btn-radius);
  border: 1px solid rgba(64, 250, 236, 0.45);
  background: rgba(64, 250, 236, 0.12);
  color: var(--cyan);
  font-weight: 700;
  text-transform: none;
}

.seo-btn--ghost {
  border-color: var(--border-soft);
  background: transparent;
  color: var(--cyan);
}

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

.seo-grid {
  display: grid;
  grid-template-columns: repeat(12, minmax(0, 1fr));
  gap: 18px;
  margin: 22px 0;
}

.seo-grid article {
  grid-column: span 4;
  padding: 24px;
}

.seo-grid article h2,
.seo-panel h2,
.seo-faq h2 {
  margin: 0 0 12px;
  font-size: clamp(1.25rem, 2vw, 1.75rem);
}

.seo-grid article p,
.seo-panel p,
.seo-panel li,
.seo-faq p,
.seo-faq li {
  color: var(--muted);
  line-height: 1.72;
}

.seo-panel {
  padding: 28px;
  margin: 22px 0;
}

.seo-panel h3 {
  margin: 0 0 10px;
  color: var(--text);
  font-size: 1.02rem;
}

.seo-columns {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 22px;
}

.seo-list,
.seo-tags {
  margin: 16px 0 0;
  padding: 0;
  list-style: none;
}

.seo-list li {
  position: relative;
  padding-left: 18px;
  margin: 0 0 12px;
}

.seo-list li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0.72em;
  width: 8px;
  height: 8px;
  border-radius: 999px;
  background: linear-gradient(135deg, var(--magenta), var(--cyan));
}

.seo-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
}

.seo-tags li {
  padding: 10px 14px;
  border-radius: 999px;
  border: 1px solid rgba(158, 97, 255, 0.16);
  background: rgba(158, 97, 255, 0.08);
  color: var(--text);
  font-family: var(--font-mono);
  font-size: 0.82rem;
  font-weight: 800;
}

.seo-faq {
  margin: 24px 0;
}

.seo-faq details {
  margin: 0 0 14px;
  padding: 18px 20px;
}

.seo-faq summary {
  cursor: pointer;
  font-weight: 700;
  list-style: none;
}

.seo-faq summary::-webkit-details-marker {
  display: none;
}

.seo-faq details p,
.seo-faq details ul {
  margin: 12px 0 0;
}

.seo-footer {
  margin-top: 28px;
  color: var(--dim);
  text-align: center;
  font-size: 0.92rem;
}

@media (max-width: 980px) {
  .seo-grid article {
    grid-column: span 6;
  }

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

@media (max-width: 680px) {
  .seo-page {
    width: min(100vw - 20px, 1180px);
    padding-top: 18px;
  }

  .seo-header {
    padding: 14px;
  }

  .seo-grid article {
    grid-column: 1 / -1;
  }

  .seo-panel,
  .seo-grid article,
  .seo-faq details {
    padding: 20px;
  }
}