:root {
  color-scheme: dark;
  --bg: #101214;
  --fg: #e8eaed;
  --muted: #9aa0a6;
  --line: #2a2e33;
  --ok: #81c995;
  --card: #181a1d;
}
* { box-sizing: border-box; }
html, body { margin: 0; min-height: 100%; }
body {
  font-family: "Segoe UI", "Helvetica Neue", sans-serif;
  background: var(--bg);
  color: var(--fg);
  line-height: 1.5;
}
header, main, footer { width: min(860px, calc(100% - 40px)); margin: 0 auto; }
header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 28px 0 12px;
  border-bottom: 1px solid var(--line);
}
.brand { font-weight: 650; letter-spacing: 0.04em; }
nav a { color: var(--muted); text-decoration: none; margin-left: 18px; }
.kicker { color: var(--muted); text-transform: uppercase; letter-spacing: 0.12em; font-size: 12px; margin-top: 48px; }
h1 { font-size: 42px; margin: 4px 0 12px; font-weight: 620; }
.lead { color: var(--muted); max-width: 560px; }
.grid { display: grid; grid-template-columns: 1fr 1fr; gap: 16px; margin: 36px 0 64px; }
article { background: var(--card); border: 1px solid var(--line); border-radius: 12px; padding: 20px; }
h2 { margin: 0 0 12px; font-size: 16px; }
.ok { color: var(--ok); font-weight: 650; margin: 0 0 16px; }
dl div { display: flex; justify-content: space-between; gap: 16px; padding: 6px 0; border-top: 1px solid var(--line); }
dt { color: var(--muted); }
ul { margin: 0; padding-left: 18px; color: var(--muted); }
code { color: var(--fg); }
footer { color: var(--muted); padding: 24px 0 40px; font-size: 13px; }
@media (max-width: 700px) { .grid { grid-template-columns: 1fr; } }