:root {
  --ink: #0f172a;
  --accent: #2563eb;
  --muted: #64748b;
  --line: #e2e8f0;
}

* { box-sizing: border-box; }

body {
  margin: 0;
  font-family: ui-sans-serif, system-ui, -apple-system, 'Segoe UI', Roboto, Arial, sans-serif;
  color: var(--ink);
  background: #f8fafc;
  line-height: 1.65;
}

header {
  background: var(--ink);
  padding: 20px 24px;
}

header a {
  display: flex;
  align-items: center;
  gap: 12px;
  max-width: 760px;
  margin: 0 auto;
  color: #fff;
  font-weight: 700;
  text-decoration: none;
}

header img { width: 34px; height: 34px; }

main {
  max-width: 760px;
  margin: 0 auto;
  padding: 40px 24px 72px;
}

h1 { font-size: 30px; line-height: 1.2; margin: 0 0 6px; }
h2 { font-size: 19px; margin: 36px 0 10px; }
h3 { font-size: 16px; margin: 24px 0 6px; }

.updated { color: var(--muted); font-size: 14px; margin: 0 0 28px; }

p, li { font-size: 15px; }
ul { padding-left: 20px; }
li { margin-bottom: 6px; }

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

table {
  width: 100%;
  border-collapse: collapse;
  margin: 16px 0;
  font-size: 14px;
}

th, td {
  text-align: left;
  padding: 9px 12px;
  border-bottom: 1px solid var(--line);
  vertical-align: top;
}

th { background: #f1f5f9; font-size: 13px; text-transform: uppercase; letter-spacing: 0.03em; color: var(--muted); }

.box {
  background: #fff;
  border: 1px solid var(--line);
  border-radius: 12px;
  padding: 18px 20px;
  margin: 20px 0;
}

.box.warn { background: #fef2f2; border-color: #fecaca; }

footer {
  border-top: 1px solid var(--line);
  margin-top: 48px;
  padding-top: 20px;
  font-size: 13px;
  color: var(--muted);
}

footer a { margin-right: 16px; }

code {
  background: #f1f5f9;
  padding: 1px 5px;
  border-radius: 4px;
  font-size: 13px;
}