:root { --ink: #0f1b2d; --muted: #4a5568; --brand: #0b3d91; --accent: #0e9f8e; --bg: #fff; --card: #f4f7fb; }
@media (prefers-color-scheme: dark) {
  :root { --ink: #e8eef7; --muted: #a9b4c4; --brand: #7fb0ff; --accent: #3fd1bf; --bg: #0c1420; --card: #152131; }
}
* { box-sizing: border-box; }
body { margin: 0; background: var(--bg); color: var(--ink); font: 17px/1.6 system-ui, -apple-system, sans-serif; }
main, header, footer { max-width: 760px; margin: 0 auto; padding: 0 16px; }
header { display: flex; align-items: center; gap: 12px; padding-top: 28px; }
header img { width: 44px; height: 44px; }
header a { color: inherit; text-decoration: none; font-weight: 700; font-size: 19px; }
h1 { font-size: clamp(30px, 6vw, 44px); line-height: 1.15; margin: 48px 0 12px; }
h2 { margin-top: 40px; }
p.lead { font-size: 20px; color: var(--muted); }
a { color: var(--brand); }
.steps { display: grid; gap: 12px; padding: 0; list-style: none; counter-reset: s; }
.steps li { background: var(--card); padding: 16px 18px 16px 56px; border-radius: 12px; position: relative; counter-increment: s; }
.steps li::before { content: counter(s); position: absolute; left: 18px; top: 16px; width: 26px; height: 26px; border-radius: 50%; background: var(--accent); color: #fff; font-weight: 700; text-align: center; line-height: 26px; font-size: 14px; }
.btn { display: inline-block; background: var(--brand); color: #fff; padding: 12px 22px; border-radius: 10px; font-weight: 700; text-decoration: none; }
@media (prefers-color-scheme: dark) { .btn { color: #0c1420; } }
code { background: var(--card); padding: 2px 6px; border-radius: 5px; }
footer { margin-top: 64px; padding-bottom: 32px; color: var(--muted); font-size: 14px; }
footer a { color: inherit; margin-right: 16px; }