:root {
  --bg: #0e1116;
  --panel: #161b22;
  --border: #2a2f3a;
  --text: #e6e9ef;
  --muted: #9aa4b2;
  --accent: #4f8cff;
}
* { box-sizing: border-box; }
body {
  margin: 0;
  font-family: ui-sans-serif, system-ui, -apple-system, Segoe UI, Roboto, sans-serif;
  background: var(--bg);
  color: var(--text);
}
header {
  border-bottom: 1px solid var(--border);
  padding: 18px 32px;
  display: flex;
  align-items: center;
  justify-content: space-between;
}
header .brand { font-weight: 700; font-size: 18px; }
nav { display: flex; gap: 24px; }
nav a {
  color: var(--muted);
  text-decoration: none;
  font-size: 14px;
}
nav a:hover, nav a.active { color: var(--text); }
main {
  max-width: 720px;
  margin: 0 auto;
  padding: 64px 24px;
}
h1 { font-size: 32px; margin: 0 0 12px; }
p.lede { color: var(--muted); font-size: 17px; line-height: 1.6; }
.card {
  background: var(--panel);
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 24px;
  margin-top: 24px;
}
.card h2 { margin-top: 0; font-size: 18px; }
.card p { color: var(--muted); line-height: 1.6; }
footer {
  border-top: 1px solid var(--border);
  padding: 24px 32px;
  color: var(--muted);
  font-size: 13px;
  text-align: center;
}
a.button {
  display: inline-block;
  margin-top: 20px;
  background: var(--accent);
  color: #fff;
  text-decoration: none;
  padding: 10px 18px;
  border-radius: 8px;
  font-size: 14px;
}