:root {
  color-scheme: dark;
  --bg: #111;
  --text: #eee;
  --muted: #9a9a9a;
  --line: #2a2a2a;
  --accent: #c8f542;
}

* { box-sizing: border-box; }
html, body { margin: 0; padding: 0; }
body {
  font: 18px/1.5 ui-sans-serif, system-ui, sans-serif;
  background: var(--bg);
  color: var(--text);
  max-width: 42rem;
  margin: 0 auto;
  padding: 2rem 1.25rem 4rem;
}

header, footer { font-size: 0.95rem; }
nav a { margin-right: 1rem; }
a { color: var(--accent); }
h1, h2 { line-height: 1.2; }
p, li { color: #ddd; }
.muted { color: var(--muted); }
hr { border: 0; border-top: 1px solid var(--line); }

.card {
  border: 1px solid var(--line);
  padding: 1rem 1.1rem;
  margin: 1rem 0;
}