html,body{
  width: 100%;
  height: 100%;
  overflow: hidden;
  touch-action: manipulation;
  -ms-touch-action: manipulation; 
  -ms-scroll-chaining: none; 
      overscroll-behavior: none;
  user-select: none;
  -webkit-user-select: none;
  -moz-user-select: none;
  -ms-user-select: none;
  -webkit-tap-highlight-color: transparent;
}
#app {
  -webkit-box-sizing: border-box;
          box-sizing: border-box;
  height: 100%;
  background-color: rgb(139, 145, 145);
}