:root { --ink: #1a1a1a; --muted: #5b6270; --brand: #1f3864; --line: #e3e6eb; --bg: #ffffff; }
@media (prefers-color-scheme: dark) {
  :root { --ink: #e8eaed; --muted: #a3a9b4; --brand: #8fb0e8; --line: #2f3440; --bg: #15181e; }
}
* { box-sizing: border-box; }
body { margin: 0; background: var(--bg); color: var(--ink);
       font: 16px/1.6 -apple-system, "Segoe UI", Calibri, Arial, sans-serif; }
header { display: flex; align-items: center; gap: 12px; padding: 16px;
         max-width: 760px; margin: 0 auto; border-bottom: 1px solid var(--line); }
header img { border-radius: 10px; }
header span { font-weight: 700; font-size: 18px; color: var(--brand); }
main { max-width: 760px; margin: 0 auto; padding: 8px 16px 32px; }
h1 { font-size: 28px; margin: 24px 0 4px; }
h2 { font-size: 19px; margin: 28px 0 6px; color: var(--brand); }
.meta { color: var(--muted); margin-top: 0; }
.lead { font-size: 18px; color: var(--muted); }
a { color: var(--brand); }
code { font-size: 13px; word-break: break-all; }
li { margin: 4px 0; }
footer { max-width: 760px; margin: 0 auto; padding: 16px; border-top: 1px solid var(--line);
         color: var(--muted); font-size: 14px; }