:root{
  --bg:#f6f7f9;
  --card:#ffffff;
  --text:#171717;
  --muted:#60646c;
  --line:#e5e7eb;
  --accent:#5b3cc4;
}
*{box-sizing:border-box}
body{
  margin:0;
  font-family:Inter,system-ui,-apple-system,BlinkMacSystemFont,"Segoe UI",sans-serif;
  background:var(--bg);
  color:var(--text);
  line-height:1.6;
}
header{
  background:#fff;
  border-bottom:1px solid var(--line);
}
.wrap{max-width:900px;margin:0 auto;padding:0 24px}
nav{
  min-height:72px;
  display:flex;
  align-items:center;
  justify-content:space-between;
  gap:20px;
}
.brand{font-weight:750;font-size:20px;text-decoration:none;color:var(--text)}
.links{display:flex;gap:18px;flex-wrap:wrap}
.links a{color:var(--muted);text-decoration:none;font-size:14px}
.links a:hover{color:var(--accent)}
main{padding:56px 0 72px}
.card{
  background:var(--card);
  border:1px solid var(--line);
  border-radius:16px;
  padding:32px;
  box-shadow:0 8px 30px rgba(0,0,0,.035);
}
h1{font-size:38px;line-height:1.15;margin:0 0 14px}
h2{font-size:22px;margin-top:34px;margin-bottom:8px}
p,li{color:#30343b}
.lead{font-size:19px;color:var(--muted);max-width:720px}
.notice{
  margin:24px 0;
  padding:16px 18px;
  border:1px solid var(--line);
  border-radius:12px;
  background:#fafafa;
}
.button{
  display:inline-block;
  margin-top:8px;
  padding:11px 16px;
  border-radius:10px;
  background:var(--accent);
  color:#fff;
  text-decoration:none;
  font-weight:650;
}
footer{
  border-top:1px solid var(--line);
  background:#fff;
  color:var(--muted);
  padding:24px 0;
  font-size:13px;
}
code{background:#f1f3f5;padding:2px 5px;border-radius:5px}
@media(max-width:640px){
  nav{align-items:flex-start;flex-direction:column;padding:18px 0}
  .links{gap:12px}
  main{padding-top:28px}
  .card{padding:22px}
  h1{font-size:31px}
}
a{overflow-wrap:anywhere}
a:focus-visible{outline:3px solid var(--accent);outline-offset:4px}