:root {
  --bg: #fafafa;
  --text: #18181b;
  --muted: #71717a;
  --line: rgba(24, 24, 27, 0.1);
  --primary: #245cff;
  --max: 720px;
}
* {
  box-sizing: border-box;
}
body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font-family: Inter, ui-sans-serif, system-ui, sans-serif;
  line-height: 1.6;
}
a {
  color: var(--primary);
}
header {
  border-bottom: 1px solid var(--line);
  background: #fff;
  padding: 20px 24px;
}
header a {
  color: inherit;
  text-decoration: none;
}
header img {
  height: 160px;
  width: auto;
  max-width: min(100%, 520px);
  object-fit: contain;
  display: block;
}
main {
  max-width: var(--max);
  margin: 0 auto;
  padding: 32px 24px 64px;
}
h1 {
  font-size: 2rem;
  margin: 0 0 8px;
}
h2 {
  font-size: 1.15rem;
  margin: 28px 0 10px;
}
p,
ul {
  margin: 0 0 14px;
  color: var(--text);
}
.updated {
  color: var(--muted);
  font-size: 0.95rem;
  margin-bottom: 24px;
}
.back-link {
  display: inline-block;
  margin-bottom: 20px;
  text-decoration: none;
  color: var(--muted);
  font-size: 0.9rem;
}
.back-link:hover {
  color: var(--primary);
}
footer {
  border-top: 1px solid var(--line);
  padding: 24px;
  text-align: center;
  color: var(--muted);
  font-size: 0.85rem;
}