.responsive {
  padding: 5px;
  float: left;
  width: 50%;
}

.clearfix:after {
  content: "";
  display: table;
  clear: both;
}

* {
  text-align: center;
  margin: auto;
  box-sizing: border-box;
}

img {
  max-width: 100%;
}

.navbar a {
  display: inline;
  padding: 5px;
  }

.section {
  padding: 20px;
  max-width: 1200px;
  }

@media screen and (max-width: 400px) {
  .navbar a {
    display: block;
    width: 100%;
    }
}

@media only screen and (max-width: 500px) {
  .responsive {
    width: 100%;
  }
}