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

* {
  -ms-user-select: none; 
  -moz-user-select: -moz-none;
  -khtml-user-select: none;
  -webkit-user-select: none;
  user-select: none;
}

html {
  background-color: #333;
}

body {
  overflow: hidden;
}