:root {
  --xf-bg: #0b1220;
  --xf-surface: #121a2b;
  --xf-muted: #8b98b8;
  --xf-text: #eef2ff;
  --xf-brand: #6366f1;
  --xf-brand-2: #22d3ee;
  --xf-border: rgba(255, 255, 255, 0.08);
}

* { box-sizing: border-box; }
body {
  margin: 0;
  font-family: Inter, system-ui, -apple-system, Segoe UI, sans-serif;
  background: linear-gradient(180deg, #0b1220 0%, #101827 100%);
  color: var(--xf-text);
  line-height: 1.6;
}
a { color: var(--xf-brand-2); }
.xf-container { width: min(1120px, calc(100% - 2rem)); margin: 0 auto; }
.xf-narrow { width: min(760px, calc(100% - 2rem)); margin: 0 auto; }
.xf-header { border-bottom: 1px solid var(--xf-border); background: rgba(11, 18, 32, 0.9); position: sticky; top: 0; backdrop-filter: blur(8px); z-index: 10; }
.xf-header-inner { display: flex; align-items: center; justify-content: space-between; gap: 1rem; padding: 1rem 0; flex-wrap: wrap; }
.xf-logo { color: var(--xf-text); text-decoration: none; font-weight: 700; font-size: 1.05rem; }
.xf-logo span { color: var(--xf-brand-2); font-weight: 600; }
.xf-nav { display: flex; gap: 1rem; flex-wrap: wrap; }
.xf-nav a { color: var(--xf-muted); text-decoration: none; }
.xf-nav a:hover { color: var(--xf-text); }
.xf-main { min-height: 60vh; }
.xf-hero { padding: 4.5rem 0 3rem; }
.xf-badge { display: inline-block; padding: 0.25rem 0.65rem; border-radius: 999px; background: rgba(99, 102, 241, 0.15); color: #c7d2fe; font-size: 0.85rem; margin-bottom: 1rem; }
.xf-hero h1, .xf-section h1 { font-size: clamp(2rem, 4vw, 3rem); line-height: 1.15; margin: 0 0 1rem; }
.xf-lead { font-size: 1.125rem; color: var(--xf-muted); max-width: 52rem; }
.xf-section { padding: 3rem 0; }
.xf-section-muted { background: rgba(255, 255, 255, 0.02); border-block: 1px solid var(--xf-border); }
.xf-grid-3 { display: grid; gap: 1rem; grid-template-columns: repeat(auto-fit, minmax(220px, 1fr)); }
.xf-grid-2 { display: grid; gap: 1rem; grid-template-columns: repeat(auto-fit, minmax(280px, 1fr)); }
.xf-split { display: grid; gap: 1.5rem; grid-template-columns: 1.2fr 0.8fr; }
.xf-card { background: var(--xf-surface); border: 1px solid var(--xf-border); border-radius: 16px; padding: 1.25rem 1.35rem; }
.xf-card h2, .xf-card h3 { margin-top: 0; }
.xf-list { margin: 0; padding-left: 1.1rem; color: var(--xf-muted); }
.xf-steps { padding-left: 1.2rem; }
.xf-steps li { margin-bottom: 1.25rem; }
.xf-actions { display: flex; flex-wrap: wrap; gap: 0.75rem; margin-top: 1.5rem; }
.xf-mt { margin-top: 1.5rem; }
.xf-btn { display: inline-flex; align-items: center; justify-content: center; padding: 0.7rem 1rem; border-radius: 10px; text-decoration: none; font-weight: 600; }
.xf-btn-primary { background: linear-gradient(135deg, var(--xf-brand), #4f46e5); color: white; }
.xf-btn-secondary { background: transparent; border: 1px solid var(--xf-border); color: var(--xf-text); }
.xf-footer { border-top: 1px solid var(--xf-border); padding: 2rem 0; color: var(--xf-muted); font-size: 0.95rem; }
.xf-footer-inner { display: flex; justify-content: space-between; gap: 1rem; flex-wrap: wrap; }
code { background: rgba(255,255,255,0.06); padding: 0.1rem 0.35rem; border-radius: 6px; font-size: 0.9em; }
.xf-section-title { font-size: 1.35rem; margin: 0 0 1.25rem; }
.xf-muted { color: var(--xf-muted); font-size: 0.95rem; }
.xf-checklist { list-style: none; padding-left: 0; }
.xf-checklist li { padding-left: 1.5rem; position: relative; margin-bottom: 0.5rem; }
.xf-checklist li::before { content: "✓"; position: absolute; left: 0; color: var(--xf-brand-2); font-weight: 700; }
.xf-steps-inline { max-width: 52rem; }
.xf-card-highlight { border-color: rgba(99, 102, 241, 0.35); }
.xf-cta-banner { padding: 2.5rem 0; background: linear-gradient(135deg, rgba(99,102,241,0.2), rgba(34,211,238,0.08)); border-top: 1px solid var(--xf-border); }
.xf-cta-banner-inner { display: flex; align-items: center; justify-content: space-between; gap: 1.5rem; flex-wrap: wrap; }
.xf-cta-banner h2 { margin: 0 0 0.35rem; font-size: 1.5rem; }
.xf-cta-banner p { margin: 0; color: var(--xf-muted); max-width: 36rem; }
@media (max-width: 768px) {
  .xf-split { grid-template-columns: 1fr; }
}