:root{
  --bg:#f6f7fb;
  --card:#ffffff;
  --text:#111827;
  --muted:#6b7280;
  --border:#e5e7eb;
  --primary:#8b5cf6;
  --primary2:#7c3aed;
  --radius:14px;
  --shadow:0 8px 24px rgba(17,24,39,.08);
  --max: 980px;
  --pad: 18px;
  --pad-sm: 12px;
  --font: system-ui, -apple-system, Segoe UI, Roboto, Helvetica, Arial, "Apple Color Emoji","Segoe UI Emoji";
}

*{box-sizing:border-box}
html,body{height:100%}
body{
  margin:0;
  font-family:var(--font);
  color:var(--text);
  background:var(--bg);
  line-height:1.55;
}
a{color:var(--primary2); text-decoration:none}
a:hover{text-decoration:underline}
.header{
  position:sticky; top:0; z-index:5;
  background:rgba(246,247,251,.9);
  backdrop-filter: blur(8px);
  border-bottom:1px solid var(--border);
}
.header-inner{
  max-width:var(--max);
  margin:0 auto;
  padding:10px var(--pad);
  display:flex;
  align-items:center;
  justify-content:space-between;
  gap:12px;
}
.brand{
  display:flex; align-items:center; gap:10px;
  font-weight:800;
  letter-spacing:.2px;
}
.badge{
  font-size:12px;
  color:#fff;
  background:linear-gradient(135deg,var(--primary),var(--primary2));
  padding:4px 10px;
  border-radius:999px;
}
.nav{
  display:flex; gap:14px; flex-wrap:wrap;
  font-size:13px;
}
.container{
  max-width:var(--max);
  margin:16px auto 30px;
  padding:0 var(--pad);
}
.card{
  background:var(--card);
  border:1px solid var(--border);
  border-radius:var(--radius);
  box-shadow:var(--shadow);
  padding:24px;
}
h1{
  margin:0 0 8px;
  font-size:28px;
  letter-spacing:-.3px;
}
.subtitle{
  margin:0 0 18px;
  color:var(--muted);
  font-size:14px;
}
h2{
  margin:22px 0 10px;
  font-size:18px;
}
p{margin:10px 0}
ul{margin:8px 0 10px 20px}
li{margin:6px 0}
hr{
  border:none;
  border-top:1px solid var(--border);
  margin:18px 0;
}
.note{
  padding:12px 14px;
  border:1px dashed var(--border);
  border-radius:12px;
  color:var(--muted);
  background:#fbfbff;
  font-size:13px;
}
.footer{
  max-width:var(--max);
  margin:18px auto 40px;
  padding:0 var(--pad);
  color:var(--muted);
  font-size:13px;
  display:flex;
  justify-content:space-between;
  flex-wrap:wrap;
  gap:10px;
}
.footer-links{
  display:flex; gap:12px; flex-wrap:wrap;
}
.small{font-size:12px;color:var(--muted)}
.kv{
  display:grid;
  grid-template-columns: 200px 1fr;
  gap:8px 14px;
  padding:12px 14px;
  border:1px solid var(--border);
  border-radius:12px;
  background:#fff;
}
.kv div:nth-child(odd){color:var(--muted)}
.btn{
  border:0;
  border-radius:12px;
  padding:10px 14px;
  font-weight:700;
  cursor:pointer;
  color:#fff;
  background:linear-gradient(135deg,var(--primary),var(--primary2));
}
.btn.secondary{
  color:var(--text);
  background:#f1f5f9;
  border:1px solid var(--border);
}
.form{
  display:grid;
  gap:12px;
  margin-top:12px;
}
.input, select, textarea{
  width:100%;
  border:1px solid var(--border);
  border-radius:12px;
  padding:10px 12px;
  font:inherit;
  background:#fff;
}
textarea{min-height:120px; resize:vertical}
.row{
  display:grid;
  grid-template-columns: 1fr 1fr;
  gap:12px;
}
@media (max-width:720px){
  .row{grid-template-columns: 1fr}
  .kv{grid-template-columns: 1fr}
  .header-inner{padding:10px var(--pad-sm)}
  .container{padding:0 var(--pad-sm)}
  .footer{padding:0 var(--pad-sm)}
  .card{padding:18px}
  h1{font-size:24px}
}