:root {
  --accent: #3B82F6;
  --text: #111827;
  --sub: #4B5563;
  --bg: #FFFFFF;
  --card: #F3F4F6;
  --line: #E5E7EB;
  --mono: "JetBrains Mono", "Fira Code", ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;
}
@media (prefers-color-scheme: dark) {
  :root { --text: #F9FAFB; --sub: #9CA3AF; --bg: #0B1120; --card: #111827; --line: #1F2937; }
}
* { box-sizing: border-box; }
body {
  margin: 0; background: var(--bg); color: var(--text);
  font: 16px/1.65 var(--mono);
}
a { color: var(--accent); }
header, main, footer { max-width: 760px; margin: 0 auto; padding: 0 20px; }
header { display: flex; align-items: center; justify-content: space-between; padding-top: 24px; padding-bottom: 24px; }
header .brand { display: flex; align-items: center; gap: 10px; font-weight: 700; color: var(--text); text-decoration: none; }
header .brand img { width: 32px; height: 32px; border-radius: 8px; }
nav a { margin-left: 16px; font-size: 14px; }
h1 { font-size: 2rem; line-height: 1.25; margin: 32px 0 12px; }
h2 { font-size: 1.2rem; margin: 40px 0 8px; }
p, li { color: var(--sub); }
.lead { font-size: 1.1rem; color: var(--text); }
.card { background: var(--card); border: 1px solid var(--line); border-radius: 14px; padding: 16px 20px; margin: 16px 0; }
.btn { display: inline-block; background: var(--accent); color: #fff; padding: 10px 18px; border-radius: 10px; text-decoration: none; font-weight: 700; }
table { width: 100%; border-collapse: collapse; font-size: 14px; }
th, td { text-align: left; vertical-align: top; padding: 8px 10px; border-bottom: 1px solid var(--line); }
th { color: var(--text); }
td { color: var(--sub); }
footer { padding-top: 32px; padding-bottom: 48px; font-size: 13px; color: var(--sub); border-top: 1px solid var(--line); margin-top: 48px; }
footer a { margin-right: 14px; }
code { background: var(--card); padding: 1px 5px; border-radius: 5px; }