:root {
  --bg: #ffffff;
  --fg: #16181d;
  --muted: #5f6570;
  --accent: #2f5bea;
  --accent-fg: #ffffff;
  --card: #f4f6fa;
  --line: #e2e5ec;
}
@media (prefers-color-scheme: dark) {
  :root {
    --bg: #111318;
    --fg: #eceef2;
    --muted: #9aa1ad;
    --accent: #6d8dff;
    --accent-fg: #0b0d12;
    --card: #1a1d24;
    --line: #2a2e37;
  }
}
* { box-sizing: border-box; }
body {
  margin: 0;
  background: var(--bg);
  color: var(--fg);
  font: 16px/1.6 system-ui, -apple-system, "Segoe UI", Roboto, sans-serif;
}
a { color: var(--accent); }
.wrap { max-width: 960px; margin: 0 auto; padding: 0 16px; }
.top { display: flex; justify-content: space-between; align-items: center; flex-wrap: wrap; gap: 8px; padding-top: 20px; padding-bottom: 20px; }
.logo { font-weight: 700; font-size: 20px; color: var(--fg); text-decoration: none; }
nav a { margin-left: 16px; color: var(--muted); text-decoration: none; }
nav a:first-child { margin-left: 0; }
.hero { padding: 48px 0 32px; }
h1 { font-size: clamp(28px, 5vw, 40px); line-height: 1.2; margin: 0 0 16px; }
.lead { font-size: 18px; color: var(--muted); max-width: 680px; }
.btn { display: inline-block; margin: 16px 0 8px; padding: 12px 22px; border-radius: 10px; background: var(--accent); color: var(--accent-fg); text-decoration: none; font-weight: 600; }
.muted { color: var(--muted); }
.small { font-size: 14px; }
.grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(210px, 1fr)); gap: 16px; margin: 16px 0 40px; }
.card { background: var(--card); border-radius: 12px; padding: 18px; }
.card h3 { margin: 0 0 8px; font-size: 17px; }
.card p { margin: 0; color: var(--muted); }
.steps li { margin-bottom: 8px; }
.doc { max-width: 760px; padding: 32px 0; }
.doc h2 { font-size: 20px; margin-top: 28px; }
.foot { border-top: 1px solid var(--line); margin-top: 48px; padding-top: 16px; padding-bottom: 32px; color: var(--muted); font-size: 14px; }
.foot p { margin: 4px 0; }