:root {
  --bg: #ffffff;
  --fg: #1f2328;
  --muted: #59636e;
  --line: #d8dee4;
  --accent: #0b5cad;
  --code-bg: #f6f8fa;
}
* { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; }
body {
  margin: 0;
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
  color: var(--fg);
  background: var(--bg);
  line-height: 1.55;
  font-size: 16px;
}
header {
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  justify-content: space-between;
  gap: 12px;
  max-width: 52rem;
  margin: 0 auto;
  padding: 20px 20px 14px;
  border-bottom: 1px solid var(--line);
}
.brand { font-weight: 650; font-size: 1.05rem; color: var(--fg); text-decoration: none; letter-spacing: -0.01em; }
.brand span { color: var(--muted); font-weight: 400; }
nav { display: flex; flex-wrap: wrap; gap: 18px; }
nav a { color: var(--muted); text-decoration: none; font-size: 0.95rem; }
nav a:hover { color: var(--accent); }
main { max-width: 52rem; margin: 0 auto; padding: 28px 20px 40px; }
h1 { font-size: 1.7rem; line-height: 1.25; margin: 0 0 14px; letter-spacing: -0.02em; }
h2 { font-size: 1.15rem; margin: 32px 0 10px; }
p { margin: 0 0 14px; }
.lead { font-size: 1.06rem; color: var(--muted); }
a { color: var(--accent); }
code { background: var(--code-bg); padding: 1px 5px; border-radius: 4px; font-size: 0.9em; }
pre { background: var(--code-bg); padding: 14px 16px; border-radius: 6px; overflow-x: auto; }
pre code { background: none; padding: 0; }
table { width: 100%; border-collapse: collapse; margin: 14px 0 18px; font-size: 0.95rem; }
th, td { text-align: left; padding: 9px 10px; border-bottom: 1px solid var(--line); vertical-align: top; }
th { color: var(--muted); font-weight: 600; font-size: 0.85rem; text-transform: uppercase; letter-spacing: 0.04em; }
.ok { color: #17643a; font-weight: 600; }
ul { padding-left: 22px; }
li { margin-bottom: 6px; }
footer { max-width: 52rem; margin: 0 auto; padding: 18px 20px 32px; border-top: 1px solid var(--line); color: var(--muted); font-size: 0.85rem; }
footer p { margin: 4px 0; }
@media (max-width: 480px) {
  h1 { font-size: 1.4rem; }
  header { padding-top: 16px; }
}