.container {
    position: absolute;
    top: 50%;
    left: 50%;
    -moz-transform: translateX(-50%) translateY(-50%);
    -webkit-transform: translateX(-50%) translateY(-50%);
    transform: translateX(-50%) translateY(-50%);
}
.container h1{
    text-align: center;
}
.container h3{
    text-align: center;
}
.buttons {
    text-align: center;
}
.tutorial {
  background-color: rgba(255, 0, 0, 0.5);
  border: none;
  color: rgba(0, 255, 0, 1);
  padding: 15px 32px;
  text-align: center;
  text-decoration: none;
  display: inline-block;
  font-size: 16px;
  margin: 4px 2px;
  cursor: pointer;
}
.start {
  background-color:  rgba(255, 255, 0, 0.5);
  border: none;
  color: rgba(0, 0, 255, 1);
  padding: 15px 40px;
  text-align: center;
  text-decoration: none;
  display: inline-block;
  font-size: 16px;
  margin: 4px 2px;
  cursor: pointer;
}
body {
  font-family: 'Courier New', monospace;
}
.center {
  display: block;
  margin-left: auto;
  margin-right: auto;
  width: 50%;
}