body {
  text-align: center;  
  line-height: 100px;
  margin-top: 10%;
  font-family: 'Comfortaa', cursive;
  background-image: url('/static/background.jpg');
  background-size: auto 100vh;
  background-repeat: no-repeat;
}

h1 {
  font-size: 40px;  
  color: white;
}

input[name="original_url"] {
  border: none;
  font-size: 30px;
  padding: 20px 30px;
  width: 500px;
  border-radius: 10px 0 0 10px;
  height: 75px;
  font-family: 'Comfortaa', cursive;
  box-sizing: border-box;
}

#shorten-url-button {
  padding: 15px;
  height: 75px;
  box-sizing: border-box;
  font-size: 30px;
  width: auto;
  margin-left: -5px;
  border: none;
  background-color: #f23f2b;
  color: white;
  border-radius: 0 10px 10px 0;
  font-family: 'Comfortaa', cursive;
}

#shorten-url-button:active {
  background-color: #ff8d23;
}

#message {
  color: white;
  font-size: 20px;
  line-height: initial;
}

#shortened-url {
  visibility: hidden;
  display: inline-block;
  border-bottom: 5px solid #f23f2b;
  padding: 0 20px;
  margin: 10px;
  min-height: 60px;
  box-sizing: border-box;
  line-height: 55px;
  font-size: 25px;
  color: white;
  cursor: pointer;
}

#shortened-url:hover {
  color: #ff8d23;
}

#shortened-url:active {
  color: #f23f2b;
}

footer {
  color: white;
  position: absolute;
  left: 0;
  right: 0;
  bottom: 0;
}

/* Responsive design */
@media only screen and (min-width: calc(100vh * 0.625)) { /*doesn't work*/
  body {
    background-size: cover;
  }  
}