:root { --ink: #16181d; --muted: #5b6070; --line: #e3e5ea; --accent: #1a56db; --bg: #f7f8fa; }
* { box-sizing: border-box; }
body { margin: 0; background: var(--bg); color: var(--ink); font: 16px/1.6 -apple-system, BlinkMacSystemFont, "Helvetica Neue", Helvetica, Arial, sans-serif; }
main { max-width: 680px; margin: 0 auto; padding: 56px 24px 80px; }
.brand { font-weight: 700; letter-spacing: .04em; text-transform: uppercase; font-size: 13px; color: var(--muted); margin: 0 0 8px; }
h1 { font-size: 30px; line-height: 1.25; margin: 0 0 16px; }
h2 { font-size: 19px; margin: 32px 0 8px; }
p, li { color: var(--ink); }
.lead { font-size: 18px; color: var(--muted); }
a { color: var(--accent); }
.button { display: inline-block; background: var(--accent); color: #fff; border: 0; border-radius: 8px; padding: 12px 20px; font: inherit; font-weight: 600; text-decoration: none; cursor: pointer; }
.card { background: #fff; border: 1px solid var(--line); border-radius: 12px; padding: 20px 24px; margin: 24px 0; }
pre { background: #fff; border: 1px solid var(--line); border-radius: 8px; padding: 16px; overflow-x: auto; font-size: 13px; white-space: pre; }
code { font-size: 14px; overflow-wrap: anywhere; }
footer { margin-top: 48px; padding-top: 16px; border-top: 1px solid var(--line); font-size: 14px; color: var(--muted); }