:root {
  --bg: #0b0d10;
  --card: #11151a;
  --text: #f4f7fb;
  --muted: #a8b1bd;
  --line: #252b33;
  --max: 860px;
}
* { box-sizing: border-box; }
html { color-scheme: dark; }
body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font-family: Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  line-height: 1.65;
}
a { color: var(--text); }
.container { width: min(calc(100% - 32px), var(--max)); margin: 0 auto; }
header {
  border-bottom: 1px solid var(--line);
  position: sticky;
  top: 0;
  background: rgba(11,13,16,.94);
  backdrop-filter: blur(12px);
}
nav {
  min-height: 68px;
  display: flex;
  gap: 22px;
  align-items: center;
  justify-content: space-between;
}
.brand { font-weight: 750; letter-spacing: .2px; text-decoration: none; }
.links { display: flex; gap: 16px; flex-wrap: wrap; }
.links a { color: var(--muted); text-decoration: none; font-size: 14px; }
.links a:hover { color: var(--text); }
main { padding: 64px 0 88px; }
.hero { padding: 20px 0 12px; }
h1 { font-size: clamp(34px, 6vw, 58px); line-height: 1.06; margin: 0 0 16px; }
h2 { margin-top: 42px; font-size: 24px; line-height: 1.25; }
p, li { color: #d7dde5; }
.lead { font-size: 19px; color: var(--muted); max-width: 720px; }
.meta { color: var(--muted); font-size: 14px; }
.card {
  margin-top: 28px;
  background: var(--card);
  border: 1px solid var(--line);
  border-radius: 16px;
  padding: 24px;
}
ul { padding-left: 22px; }
code {
  background: #171b21;
  border: 1px solid var(--line);
  border-radius: 7px;
  padding: 2px 6px;
}
footer {
  border-top: 1px solid var(--line);
  padding: 28px 0 40px;
  color: var(--muted);
  font-size: 14px;
}
.notice {
  border-left: 3px solid #69717c;
  padding-left: 16px;
  color: var(--muted);
}
@media (max-width: 680px) {
  nav { align-items: flex-start; padding: 18px 0; flex-direction: column; }
  main { padding-top: 40px; }
}