:root {
  --bg: #0c1117;
  --card: #1a2332;
  --text: #e6edf3;
  --muted: #9ca7b3;
  --accent: #00a7e1;
  --border: #233040;
}

* { box-sizing: border-box; }

html, body {
  margin: 0;
  padding: 0;
  background: var(--bg);
  color: var(--text);
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
}

main {
  max-width: 720px;
  margin: 0 auto;
  padding: 48px 24px 96px;
}

header {
  border-bottom: 1px solid var(--border);
  padding-bottom: 24px;
  margin-bottom: 32px;
}

header a.brand {
  color: var(--text);
  text-decoration: none;
  font-weight: 700;
  font-size: 18px;
  letter-spacing: -0.01em;
}

header nav {
  margin-top: 12px;
  font-size: 14px;
}

header nav a {
  color: var(--muted);
  text-decoration: none;
  margin-right: 16px;
}

header nav a:hover { color: var(--accent); }

h1 {
  font-size: 32px;
  letter-spacing: -0.02em;
  margin: 0 0 8px;
}

h2 {
  font-size: 20px;
  margin-top: 32px;
  margin-bottom: 8px;
  letter-spacing: -0.01em;
}

p, li { color: var(--text); }

a { color: var(--accent); }

.muted { color: var(--muted); font-size: 14px; }

ul { padding-left: 22px; }

li { margin-bottom: 6px; }

footer {
  margin-top: 64px;
  padding-top: 24px;
  border-top: 1px solid var(--border);
  color: var(--muted);
  font-size: 13px;
}

footer a { color: var(--muted); margin-right: 16px; }