:root { --ink: #1c2430; --muted: #5b6676; --line: #e3e7ee; --brand: #2f6fc4; --bg: #ffffff; --soft: #f5f7fa; }
@media (prefers-color-scheme: dark) {
  :root { --ink: #e8ecf2; --muted: #a3adbb; --line: #2a3240; --brand: #6ea6ee; --bg: #12161d; --soft: #1a2029; }
}
* { box-sizing: border-box; }
body { margin: 0; background: var(--bg); color: var(--ink);
  font: 17px/1.55 -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif; }
header { background: var(--brand); color: #fff; }
header .wrap { display: flex; align-items: center; justify-content: space-between; gap: 16px; flex-wrap: wrap; padding-block: 16px; }
header a { color: #fff; text-decoration: none; }
header .name { font-weight: 700; font-size: 20px; }
nav a { margin-left: 18px; opacity: .9; }
nav a:hover { opacity: 1; text-decoration: underline; }
.wrap { max-width: 760px; margin: 0 auto; padding-inline: 20px; }
main { padding-block: 36px 56px; }
h1 { font-size: 30px; line-height: 1.2; margin: 0 0 12px; }
h2 { font-size: 21px; margin: 32px 0 8px; }
p, li { color: var(--ink); }
.lead { font-size: 19px; color: var(--muted); margin-top: 0; }
ul { padding-left: 22px; }
li { margin: 6px 0; }
a { color: var(--brand); }
.card { background: var(--soft); border: 1px solid var(--line); border-radius: 12px; padding: 16px 20px; margin: 20px 0; }
code { background: var(--soft); border: 1px solid var(--line); border-radius: 5px; padding: 1px 5px; font-size: 15px; }
footer { border-top: 1px solid var(--line); color: var(--muted); font-size: 14px; }
footer .wrap { padding-block: 20px; }