:root{
  --bg1:#0f172a;
  --bg2:#07103a;
  --card:#0b1230;
  --accent1:#6a11cb;
  --accent2:#2575fc;
  --muted:#9aa4bf;
}
*{box-sizing:border-box}
html,body{height:100%}
body{
  margin:0;
  font-family:Inter,system-ui,-apple-system,"Segoe UI",Roboto,"Helvetica Neue",Arial;
  background:linear-gradient(135deg,var(--bg1),var(--bg2));
  color:#e6eef8;
  -webkit-font-smoothing:antialiased;
  -moz-osx-font-smoothing:grayscale;
}
.center{min-height:100%;display:flex;flex-direction:column;align-items:center;justify-content:center;padding:32px}
.card{background:linear-gradient(180deg,rgba(255,255,255,0.02),rgba(255,255,255,0.01));border:1px solid rgba(255,255,255,0.04);padding:36px;border-radius:12px;box-shadow:0 10px 30px rgba(2,6,23,0.6);max-width:720px;text-align:center}
.brand{display:flex;align-items:center;gap:16px;justify-content:center}
.brand h1{margin:0;font-size:20px;letter-spacing:0.6px}
h2{font-size:38px;margin:18px 0 6px}
.lead{color:var(--muted);margin:0 0 18px}
.meta a{color:linear-gradient(90deg,var(--accent1),var(--accent2));color:#cfe1ff;text-decoration:none;border-bottom:1px dashed rgba(207,225,255,0.12);padding-bottom:2px}
.footer{color:var(--muted);font-size:13px;margin-top:18px}

@media (max-width:520px){
  .card{padding:24px;border-radius:10px}
  h2{font-size:28px}
}