.leftside, .rightside {
    height:100%;
    width:100%;
}

.centered {
    position: fixed; /* or absolute */
    top: 50%;
    left: 50%;
    /* bring your own prefixes */
    transform: translate(-50%, -50%);
  }


 .prevent-select {
    -webkit-user-select: none; /* Safari */
    -ms-user-select: none; /* IE 10 and IE 11 */
    user-select: none; /* Standard syntax */
}

.cursor-hide {
    cursor: none;
}