:root{
  --bg:#0f1724;
  --card:#0b1220;
  --muted:#9aa4b2;
  --accent:#4f46e5;
  --accent-2:#06b6d4;
  --text:#e6eef8;
}
*{box-sizing:border-box}
body{
  margin:0;
  font-family:Inter,Segoe UI,Roboto,Arial,Helvetica,sans-serif;
  background:linear-gradient(180deg,var(--bg),#071029);
  color:var(--text);
  -webkit-font-smoothing:antialiased;
}
.container{
  max-width:880px;
  margin:48px auto;
  padding:20px;
}
header h1{margin:0;font-size:2rem}
.lead{color:var(--muted);margin-top:6px}
.card{
  background:linear-gradient(180deg, rgba(255,255,255,0.02), rgba(255,255,255,0.01));
  border:1px solid rgba(255,255,255,0.03);
  padding:18px;
  border-radius:10px;
  margin-top:18px;
}
button{
  background:linear-gradient(90deg,var(--accent),var(--accent-2));
  border:0;color:white;padding:10px 14px;border-radius:8px;cursor:pointer;font-weight:600
}
.msg{margin-top:12px;color:var(--accent-2)}
footer{margin-top:22px;color:var(--muted);font-size:0.9rem}

@media (max-width:600px){
  .container{margin:20px;padding:14px}
  header h1{font-size:1.4rem}
}