body{
  font-family:Arial;
  background:#f7f7f7;
  margin:0;
  color:#111;
}
.hero{
  text-align:center;
  padding:100px 20px;
}
.btn{
  background:#111;
  color:#fff;
  padding:14px 28px;
  border-radius:10px;
  text-decoration:none;
  display:inline-block;
  margin-top:20px;
}
.card{
  background:#fff;
  border-radius:14px;
  padding:20px;
  box-shadow:0 10px 30px rgba(0,0,0,.08);
}