:root {
  color-scheme: dark;
  --bg: #111419;
  --panel: #1a1f27;
  --text: #f7f8fa;
  --muted: #adb7c6;
  --accent: #71d5b1;
  --line: #303744;
}

* { box-sizing: border-box; }

body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font: 17px/1.65 -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
}

main {
  width: min(760px, calc(100% - 40px));
  margin: 0 auto;
  padding: 64px 0 80px;
}

h1 { font-size: clamp(38px, 8vw, 64px); line-height: 1.05; margin: 0 0 12px; }
h2 { margin: 44px 0 12px; font-size: 25px; }
h3 { margin: 28px 0 8px; font-size: 19px; }
p, li { color: var(--muted); }
a { color: var(--accent); }
.lead { font-size: 21px; }
.card { background: var(--panel); border: 1px solid var(--line); border-radius: 18px; padding: 22px; margin: 18px 0; }
.meta { color: var(--muted); font-size: 14px; }
nav { display: flex; gap: 18px; margin: 28px 0 8px; }
ul { padding-left: 22px; }