html, body, .container
{
  font-family: Arial, sans-serif;
  background-color: #f3f6f9;
  margin: 0;
}
section {
  max-width: 500px;
  margin: 60px auto;
  background: white;
  padding: 24px;
  border-radius: 6px;
}
h1 {
  color: #04AA6D;
}
.responsive {
  width: 100%;
  height: auto;
}