body {
  background:#0a0a0f;
  color:white;
  font-family:Arial;
  display:flex;
  justify-content:center;
  align-items:center;
  height:100vh;
  margin:0;
}

.box {
  background:#12121a;
  padding:25px;
  border-radius:18px;
  width:360px;
  text-align:center;
  box-shadow:0 0 25px rgba(0,0,0,0.4);
}

input {
  width:100%;
  padding:12px;
  margin-top:15px;
  border-radius:12px;
  border:none;
  background:#1e1e28;
  color:white;
  font-size:17px;
}

button, .btn-download {
  margin-top:20px;
  padding:12px;
  width:100%;
  background:#6366f1;
  border:none;
  color:white;
  font-size:18px;
  border-radius:12px;
  text-decoration:none;
  cursor:pointer;
  display:block;
}