html, body {
  margin: 0;
  padding: 0;

}

canvas {
  display: block;
  position: absolute;

}

input {
  font-size: 20;
  position: absolute; 
  font-size: 20px;
  color: #000;
  background-color: #fff;
  border: 2px solid #000;
  padding: 2px 5px;
  outline: none;
  z-index: 10;
}