:root {
  --text: #1f2328;
  --muted: #59636e;
  --accent: #0b57d0;
  --line: #d8dee4;
  --bg: #ffffff;
  --panel: #f6f8fa;
}

* { box-sizing: border-box; }

body {
  margin: 0;
  font-family: -apple-system, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
  font-size: 17px;
  line-height: 1.6;
  color: var(--text);
  background: var(--bg);
}

header, main, footer {
  max-width: 820px;
  margin: 0 auto;
  padding: 0 24px;
}

header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 12px;
  padding-top: 20px;
  padding-bottom: 16px;
  border-bottom: 1px solid var(--line);
}

.brand {
  font-size: 22px;
  font-weight: 700;
  color: var(--text);
  text-decoration: none;
}

nav a {
  margin-left: 18px;
  color: var(--accent);
  text-decoration: none;
  font-weight: 500;
}

nav a:first-child { margin-left: 0; }
nav a:hover, a:hover { text-decoration: underline; }

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

h1 { font-size: 32px; line-height: 1.25; margin: 32px 0 8px; }
h2 { font-size: 22px; margin: 32px 0 8px; }
h3 { font-size: 18px; margin: 20px 0 4px; }

.lead { font-size: 19px; color: var(--muted); }
.meta { color: var(--muted); font-size: 15px; }

.panel {
  background: var(--panel);
  border: 1px solid var(--line);
  border-radius: 8px;
  padding: 16px 20px;
  margin: 20px 0;
}

table { border-collapse: collapse; width: 100%; margin: 12px 0; font-size: 15px; }
th, td { border: 1px solid var(--line); padding: 8px 10px; text-align: left; vertical-align: top; }
th { background: var(--panel); }

code { background: var(--panel); padding: 1px 5px; border-radius: 4px; font-size: 15px; }

.badge img { width: 210px; height: auto; display: block; }

footer {
  margin-top: 48px;
  padding-top: 16px;
  padding-bottom: 32px;
  border-top: 1px solid var(--line);
  color: var(--muted);
  font-size: 15px;
}

footer a { margin-right: 16px; }