:root {
  --fg: #1c1c1e;
  --muted: #6e6e73;
  --bg: #ffffff;
  --card: #f5f5f7;
  --link: #0a84ff;
  --maxw: 760px;
}

* { box-sizing: border-box; }
html, body { margin: 0; padding: 0; background: var(--bg); color: var(--fg); }
body {
  font: 16px/1.6 -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Inter, Arial, sans-serif;
  padding: 24px;
}
.container { max-width: var(--maxw); margin: 0 auto; }
header, footer {
  margin: 0 auto 24px;
  padding: 16px 0;
}
nav a {
  color: var(--link);
  text-decoration: none;
  margin-right: 16px;
  font-weight: 500;
}
nav a:hover { text-decoration: underline; }

.card {
  background: var(--card);
  border-radius: 16px;
  padding: 20px;
  margin-bottom: 16px;
}

h1 { font-size: 28px; margin: 0 0 8px; }
h2 { font-size: 20px; margin: 24px 0 8px; }
p { margin: 0 0 12px; }
small, .muted { color: var(--muted); }

ul { padding-left: 18px; margin: 0 0 12px; }
li { margin: 6px 0; }

footer { font-size: 14px; color: var(--muted); }
hr { border: 0; border-top: 1px solid #e5e5ea; margin: 24px 0; }

.badge {
  display: inline-block;
  padding: 2px 8px;
  font-size: 12px;
  border-radius: 999px;
  background: #e5f2ff;
  color: #005bbb;
  margin-left: 8px;
}