:root {
  color-scheme: dark;
  font-family: Inter, Arial, sans-serif;
  background: #070a0f;
  color: #f7fafc;
}

* { box-sizing: border-box; }
body { margin: 0; background: #070a0f; color: #f7fafc; }
a { color: #5eead4; }
.site-header, .article, .guide-nav, .site-footer { width: min(100% - 36px, 920px); margin-inline: auto; }
.site-header { display: flex; align-items: center; justify-content: space-between; gap: 20px; padding: 22px 0; border-bottom: 1px solid #263445; }
.brand { display: inline-flex; align-items: center; gap: 11px; color: #f7fafc; text-decoration: none; font-weight: 800; font-size: 22px; }
.brand img { width: 46px; height: 46px; object-fit: contain; }
.app-link { padding: 10px 14px; border: 1px solid #2dd4bf; color: #2dd4bf; text-decoration: none; font-weight: 700; }
.article { padding: 64px 0 44px; }
.eyebrow { color: #2dd4bf; font-weight: 800; text-transform: uppercase; font-size: 13px; }
h1 { max-width: 820px; margin: 14px 0 20px; font-size: clamp(38px, 7vw, 70px); line-height: 1.02; }
h2 { margin: 42px 0 12px; font-size: 30px; }
p, li { color: #c4ced8; font-size: 18px; line-height: 1.7; }
.lead { max-width: 760px; color: #dce5ec; font-size: 22px; }
.hero-image { display: block; width: 100%; margin: 34px 0; border: 1px solid #263445; }
.guide-nav { display: grid; grid-template-columns: repeat(3, 1fr); gap: 12px; padding-bottom: 54px; }
.guide-nav a { padding: 18px; border: 1px solid #263445; background: #101722; color: #f7fafc; text-decoration: none; font-weight: 700; }
.guide-nav a:hover { border-color: #2dd4bf; }
.note { padding: 18px; border-left: 4px solid #facc15; background: #101722; color: #dce5ec; }
.site-footer { padding: 26px 0 40px; border-top: 1px solid #263445; color: #9cacbd; }
@media (max-width: 700px) { .guide-nav { grid-template-columns: 1fr; } .article { padding-top: 40px; } }