:root {
  --bg: #0f1115;
  --card: #171a21;
  --text: #e8eaed;
  --muted: #9aa0a6;
  --accent: #4f8cff;
  --border: #2a2e37;
}

* { box-sizing: border-box; }

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

header {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 24px 20px;
  border-bottom: 1px solid var(--border);
  max-width: 760px;
  margin: 0 auto;
}

header img { width: 40px; height: 40px; border-radius: 10px; }
header h1 { font-size: 20px; margin: 0; }

nav {
  max-width: 760px;
  margin: 0 auto;
  padding: 12px 20px 0;
  display: flex;
  gap: 18px;
}

nav a {
  color: var(--muted);
  text-decoration: none;
  font-size: 14px;
}
nav a:hover, nav a.active { color: var(--accent); }

main {
  max-width: 760px;
  margin: 0 auto;
  padding: 24px 20px 60px;
}

h1, h2 { color: var(--text); }
h2 { margin-top: 32px; font-size: 18px; border-top: 1px solid var(--border); padding-top: 24px; }

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

.card {
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 20px;
  margin: 16px 0;
}

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

footer {
  max-width: 760px;
  margin: 0 auto;
  padding: 20px;
  color: var(--muted);
  font-size: 13px;
  border-top: 1px solid var(--border);
}

ul { padding-left: 20px; }
code { background: #20242d; padding: 2px 6px; border-radius: 4px; font-size: 13px; }