:root {
  color-scheme: light dark;
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  background: #080808;
  color: #f5f5f7;
}
* { box-sizing: border-box; }
body { margin: 0; background: radial-gradient(circle at 50% 0, #272727 0, #0b0b0b 45%, #050505 100%); }
main { width: min(760px, calc(100% - 32px)); margin: 0 auto; padding: 72px 0 40px; }
header { padding: 28px 0 40px; }
.eyebrow { color: #aaa; letter-spacing: .08em; }
h1 { margin: 12px 0; font-size: clamp(2.2rem, 7vw, 4.4rem); line-height: 1.05; letter-spacing: -.04em; }
.lead { max-width: 620px; color: #c7c7cc; font-size: 1.15rem; line-height: 1.65; }
section { margin: 18px 0; padding: 26px; border: 1px solid #333; border-radius: 22px; background: rgba(255,255,255,.055); backdrop-filter: blur(18px); }
h2 { margin-top: 0; }
h3 { margin: 24px 0 8px; color: #dedee3; }
p, li { color: #c7c7cc; line-height: 1.7; }
a { color: #fff; text-underline-offset: 4px; }
footer { padding: 24px 4px; color: #aaa; }
@media (prefers-color-scheme: light) {
  :root { background: #f4f4f6; color: #111; }
  body { background: radial-gradient(circle at 50% 0, #fff 0, #f1f1f3 70%); }
  section { border-color: #ddd; background: rgba(255,255,255,.78); }
  .lead, p, li, h3 { color: #444; }
  a { color: #111; }
}