body{
  margin:0;
  font-family:Arial,sans-serif;
  background:#050505;
  color:white;
}
.app{
  max-width:520px;
  margin:0 auto;
  padding:28px 18px;
}
h1{
  font-size:42px;
  margin:0;
}
.tagline{
  color:#00ff9c;
  font-size:18px;
  margin-bottom:28px;
}
.card{
  border:1px solid rgba(0,255,156,.35);
  border-radius:18px;
  padding:18px;
  margin:14px 0;
  background:rgba(255,255,255,.04);
}
.card h2{
  margin:0 0 8px;
}
.card p{
  color:#cfcfcf;
}
.button{
  display:block;
  text-align:center;
  margin-top:24px;
  padding:16px;
  border-radius:14px;
  background:#00ff9c;
  color:#000;
  text-decoration:none;
  font-weight:bold;
}