html
{
    height: 100%;
    margin: 0;
    padding: 0;
    overflow: hidden;
}

body
{
    height: 100%;
    margin: 0;
    padding: 0;
    overflow: auto;
    overscroll-behavior-y: none;
}

div.menu
{
  width: 30%;
  margin: 15px;
  float: left;
  display: block;
}

#drawing
{
  top: 0;
  float: right;
  width: 65%;
  height: 100%;
  display: block;
  margin: 0;
  padding: 0;
}

#canvas
{
  width: 100%;
  height: 100%;
  background: #fff;
  display: block;
}