body {
  text-align: center;
  background-color: #071C21;
}

#game-title {
  font-family: 'VT323', monospace;
  font-size: 3rem;
  margin: 5%;
  color: #C6DE41;
  line-height: 5rem;
  text-align: center;
}

.container {
  display: block;
  width: 50%;
  margin: auto;

}

.btn {
  margin: 25px;
  display: inline-block;
  height: 5rem;
  width: 5rem;
  border-radius: 20%;
}  


.game-over {
  background-color: red;
  opacity: 0.8;
}

.red {
  background-color: red;
}

.green {
  background-color: green;
}

.blue {
  background-color: blue;
}

.yellow {
  background-color: yellow;
}

.pressed {
  box-shadow: 0 0 20px white;
  background-color: grey;
}

footer{
  color: #C6DE41;
  font-family: 'VT323', monospace;
  font-size: 1.25rem;
}

a{
  color: #C6DE41;
}

a:hover{
  color: white;
}

.start {
  background-color: #C6DE41;
  width: 5rem;
  height: 5rem;
  font-family: 'VT323', monospace;
  font-size: 2rem;
}