html {
  color: #646464;
  font-family: "Source Sans Pro", sans-serif;
}

body {
  background-image: url('/image.jpg');
  background-position: center center;
  background-repeat: no-repeat;
  background-size: cover;
  display: flex;
  height: 100vh;
  margin: 0;
  padding: 0;
}

.content {
  background-color: #E3E3E3;
  margin: auto;
  padding: 20px;
  text-align: center;
}

h1 {
  font-weight: 300;
  font-size: 64px;
}

.blocks {
  width: 100%;
}

a.block {
  width: 240px;
  height: 100px;
  text-align: center;
  vertical-align: middle;
  line-height: 100px;
  margin: 5px;

  background-color: #F6F6F6;
  color: #646464;
  display: inline-block;
  font-size: 32px;
  font-weight: 300;
  text-decoration: none;
}
a.block:hover {
  background-color: white;
}

@media screen and (max-width: 500px), screen and (max-height: 400px) {
  h1 { font-size: 48px; }
  .content {
    width: calc(100% - 40px);
    margin: auto 20px;
    padding: 10px;
  }
  a.block {
    font-size: 24px;
    height: 60px;
    line-height: 60px;
  }
}