:root { color-scheme: light dark; }
* { box-sizing: border-box; }
body {
  margin: 0; padding: 48px 24px 80px;
  font: 16px/1.65 -apple-system, BlinkMacSystemFont, "Segoe UI", system-ui, sans-serif;
  background: #0c0e13; color: #d9dce3;
}
main { max-width: 680px; margin: 0 auto; }
h1 { font-size: 30px; line-height: 1.2; margin: 0 0 6px; color: #f5f6f8; letter-spacing: -0.01em; }
h2 { font-size: 18px; margin: 36px 0 10px; color: #f5f6f8; }
.sub { color: #8b91a0; margin: 0 0 36px; }
a { color: #6ba4ff; }
ul { padding-left: 20px; }
li { margin: 6px 0; }
.card { background: #141821; border: 1px solid rgba(255,255,255,.08); border-radius: 14px; padding: 20px 22px; margin: 20px 0; }
footer { margin-top: 48px; padding-top: 20px; border-top: 1px solid rgba(255,255,255,.08); color: #6d7382; font-size: 14px; }
code { background: rgba(255,255,255,.07); padding: 1px 6px; border-radius: 5px; font-size: 14px; }