:root {
  color-scheme: light;
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Arial, sans-serif;
  font-synthesis: none;
  text-rendering: optimizeLegibility;
  --bg: #f6f8fb;
  --fg: #182231;
  --muted: #5e6c7b;
  --line: #dce3eb;
  --accent: #2858cc;
  --surface: #ffffff;
}
* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body { margin: 0; background: var(--bg); color: var(--fg); line-height: 1.65; }
.wrap { max-width: 810px; margin: 0 auto; padding: 0 26px; }
header { padding: 24px 0; border-bottom: 1px solid var(--line); background: var(--surface); }
nav { display: flex; justify-content: space-between; align-items: center; gap: 16px; flex-wrap: wrap; }
.brand { font-size: 17px; font-weight: 700; letter-spacing: -.03em; color: var(--fg); text-decoration: none; }
nav .links { display: flex; gap: 22px; }
a { color: var(--accent); }
nav .links a { text-decoration: none; font-size: 14px; }
main { padding: 68px 0 88px; }
h1 { font-size: clamp(34px, 5vw, 49px); line-height: 1.15; letter-spacing: -.045em; margin: 10px 0 24px; }
h2 { font-size: 22px; letter-spacing: -.025em; margin: 38px 0 12px; }
p { margin: 0 0 18px; }
.eyebrow { font-size: 12px; text-transform: uppercase; letter-spacing: .13em; color: var(--accent); font-weight: 700; }
.lead { color: var(--muted); font-size: 19px; line-height: 1.7; max-width: 690px; }
.card { background: var(--surface); border: 1px solid var(--line); border-radius: 16px; padding: 28px 30px; margin: 30px 0; }
.card h2 { margin-top: 0; }
ul { padding-left: 22px; }
li { margin-bottom: 10px; }
.note { border-left: 3px solid var(--accent); padding: 12px 18px; background: #eef3ff; border-radius: 0 8px 8px 0; }
footer { padding: 22px 0; border-top: 1px solid var(--line); color: var(--muted); font-size: 13px; }
footer .wrap { display: flex; gap: 14px; justify-content: space-between; flex-wrap: wrap; }
@media (max-width: 520px) { main { padding: 44px 0 64px; } .card { padding: 20px; } }