*:before,
*:after,
* {
   margin: 0;
   padding: 0;
   box-sizing: border-box;
}
body {
   width: 100vw;
   height: 100vh;
   overflow: hidden;
   user-select: none;
   -moz-user-select: none;
   -webkit-user-select: none;
   scroll-behavior: unset;
   background-color: #ffcab7;
}

.unselectable {
   user-select: none;
   -moz-user-select: none;
   -webkit-user-select: none;
   cursor: default;
}

canvas {
   background-color: aqua;
   border: 1px solid black;
}