body
{
	background-color:#a1b2c3;
}

header{
  text-align:center;
}

footer{
/*
  color:red;
*/
  position: absolute;
  bottom:1em;
  right:1em;
}

menu{
  background-color:white;
  position:absolute;
  left:5px;
  width:150px;
}
screen{
  position:absolute;
  top:6em;
  left:15em;
}

.button {
  -webkit-appearance: button;
  -moz-appearance: button;
  appearance: button;
  text-decoration: none;
  color: gray;
  background-color: black;
  position:relative;
  left:-39px;
  padding: 15px 32px;
  text-align: center;
  display: inline-block;
  font-size: 16px;
  margin: 4px 2px;
  cursor: crosshair;
  width:120px;
}