:root {
  color-scheme: dark;
  font-family: Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  background: #000c1a;
  color: #e8eef5;
}
* { box-sizing: border-box; }
body { margin: 0; background: radial-gradient(900px 520px at 50% -10%, rgba(12,228,255,.11), transparent 70%), #000c1a; }
header, main, footer { width: min(780px, calc(100% - 40px)); margin: 0 auto; }
header { padding: 28px 0; }
main { padding: 48px 0 72px; }
footer { padding: 28px 0 48px; border-top: 1px solid rgba(255,255,255,.1); color: #8ba0b4; }
a { color: #0ce4ff; }
.back { text-decoration: none; color: #a9bac9; }
h1 { margin: 0 0 24px; font-size: clamp(2.4rem, 8vw, 4.8rem); line-height: 1.04; letter-spacing: -.045em; }
h2 { margin: 42px 0 12px; font-size: 1.35rem; }
p, li { color: #a9bac9; line-height: 1.75; }
.lede { font-size: 1.15rem; color: #c8d5df; }
.card { margin: 24px 0; padding: 24px; border: 1px solid rgba(255,255,255,.12); border-radius: 16px; background: rgba(255,255,255,.03); }
.links { display: flex; flex-wrap: wrap; gap: 12px 20px; }