:root { --ink: #111318; --muted: #5b6070; --line: #e4e6ec; --accent: #3C42F0; --bg: #ffffff; }
@media (prefers-color-scheme: dark) { :root { --ink: #eceef3; --muted: #a2a8b8; --line: #2a2d36; --bg: #0d0e12; } }
* { box-sizing: border-box; }
body { margin: 0; background: var(--bg); color: var(--ink); font: 17px/1.6 system-ui, -apple-system, "Segoe UI", Inter, sans-serif; }
main { max-width: 680px; margin: 0 auto; padding: 48px 20px 80px; }
header { display: flex; align-items: center; gap: 10px; margin-bottom: 40px; }
.mark { width: 34px; height: 34px; border-radius: 9px; background: var(--accent); color: #fff; display: grid; place-items: center; font-weight: 700; }
header a { color: var(--ink); text-decoration: none; font-weight: 600; }
h1 { font-size: 32px; line-height: 1.2; margin: 0 0 8px; letter-spacing: -0.01em; }
h2 { font-size: 20px; margin: 36px 0 8px; }
p, li { color: var(--ink); }
.muted { color: var(--muted); font-size: 15px; }
a { color: var(--accent); }
ul { padding-left: 22px; }
.cta { display: inline-block; margin-top: 20px; padding: 12px 20px; border-radius: 10px; background: var(--accent); color: #fff; text-decoration: none; font-weight: 600; }
footer { margin-top: 56px; padding-top: 20px; border-top: 1px solid var(--line); font-size: 14px; color: var(--muted); }
footer a { color: var(--muted); margin-right: 14px; }