:root { color-scheme: light; --ink: #1d1d1f; --muted: #5a5a60; --line: #e3e3e8; --accent: #6b2fd6; }
* { box-sizing: border-box; }
body { margin: 0; font: 17px/1.6 -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif; color: var(--ink); background: #fff; }
header, main, footer { max-width: 760px; margin: 0 auto; padding: 0 20px; }
header { display: flex; align-items: center; justify-content: space-between; padding-top: 22px; padding-bottom: 22px; border-bottom: 1px solid var(--line); }
header a.brand { font-weight: 700; color: var(--ink); text-decoration: none; }
header nav a { margin-left: 18px; color: var(--muted); text-decoration: none; font-size: 15px; }
header nav a:hover { color: var(--ink); }
main { padding-top: 36px; padding-bottom: 48px; }
h1 { font-size: 34px; line-height: 1.2; margin: 0 0 14px; }
h2 { font-size: 22px; margin: 36px 0 10px; }
h3 { font-size: 18px; margin: 24px 0 6px; }
p.lead { font-size: 19px; color: var(--muted); margin-top: 0; }
a { color: var(--accent); }
code { font: 15px/1.4 ui-monospace, SFMono-Regular, Menlo, Consolas, monospace; background: #f4f4f7; padding: 1px 5px; border-radius: 4px; }
ul, ol { padding-left: 22px; }
li { margin: 4px 0; }
table { border-collapse: collapse; width: 100%; font-size: 15px; margin: 10px 0; }
th, td { text-align: left; vertical-align: top; padding: 8px 10px; border-bottom: 1px solid var(--line); }
th { color: var(--muted); font-weight: 600; }
.box { border: 1px solid var(--line); border-radius: 10px; padding: 16px 20px; margin: 18px 0; background: #fafafc; }
footer { border-top: 1px solid var(--line); padding-top: 18px; padding-bottom: 36px; color: var(--muted); font-size: 14px; }
footer a { color: var(--muted); margin-right: 14px; }
@media (max-width: 560px) { h1 { font-size: 28px; } header nav a { margin-left: 12px; } }