html, body {
    height: 100%;
   	width: 100%;
    margin: 0;
  	overflow-y: hidden; /* Hide vertical scrollbar */
  	overflow-x: hidden; /* Hide horizontal scrollbar */
}

button {
    height: 100%;
    width: 100%;
}

canvas {
  	position: absolute;
   	height: 100%;
  	margin: 0;
    width: 100%;
}

input {
 position: absolute; 
}