body{
  margin:0;
  font-family:Arial, sans-serif;
  text-align:center;
  background:#f5f5f5;
}
.hero{
  background:#0b2c5d;
  color:#fff;
  padding:30px 15px;
}
.hero img{
  max-width:100%;
  border-radius:10px;
}
.btn{
  display:inline-block;
  margin:15px;
  padding:15px 30px;
  background:#25D366;
  color:#fff;
  text-decoration:none;
  font-size:18px;
  border-radius:50px;
}
.section{
  padding:30px 15px;
  background:#fff;
}
.section.dark{
  background:#eaf0ff;
}
ul{
  list-style:none;
  padding:0;
}
ul li{
  margin:10px 0;
  font-size:16px;
}
.cta{
  background:#0b2c5d;
  color:#fff;
  padding:30px 15px;
}
footer{
  background:#000;
  color:#aaa;
  padding:10px;
  font-size:14px;
}
footer a{
  color:#aaa;
  text-decoration:none;
}