body{
  background: #f8f8f8
}

.container{
  text-align: center;
  margin-top: 5vh;
  color: #fff;
}

.footer{
  font-size: 10px;
  position: absolute;
  bottom: 10px;
  right: 10px;
}

#dlarea a {
  display: block;
  color: #fff;
  padding: 5px;
  text-decoration: none;
  border: 1px solid;
  animation: colorchange 3s;
  -webkit-animation: colorchange 3s;
}

#input-area, #dlarea {
  display: inline-block;
  border-radius: 5px;
  padding: 15px;
  margin: 5px;
  box-shadow: 0px 0px 5px black;
}

#input-area{
  background: cornflowerblue;
}

#dlarea{
  background: #4caf50;
}

@keyframes colorchange{
  50%  {background: #c33d3d;}
  100% {background: transparent;}
}

@-webkit-keyframes colorchange{
  50%  {background: #c33d3d;}
  100% {background: transparent;}
}