body {
  background-color: black;
  margin: 2%;
  font-family: 'Verdana', sans-serif;
  color: white;
}

@media (max-resolution: 1.5dppx){
  body {
    font-size: 1vw;
  }
  button {
    font-size: 1vw;
  }
  #username {
    font-size: 1vw;
  }
}

@media (min-resolution: 2dppx){
  body {
    font-size: 4vw;
  }
  button {
    font-size: 4vw;
  }
  #username {
    font-size: 4vw;
  }
}

#buzzerbtn {
  width : 80vw;
  height: 40vh;
  color :black;
  background-color: red;
  font-weight: bold;
  border-radius: 50%;
}

#startrndbtn {
  width : 20vw;
  height: 20vh;
  color : black;
  background-color: greenyellow;
  font-weight: bold;
}

#endgamebtn {
  width: 20vw;
  height:20vh;
  color: black;
  background-color: red;
  font-weight: bold;
}