* {outline: none;
    user-select: none;
    cursor: default;}
body {font-family: Arial;
    font-size: 15px;}
#container {display: block;
    position: absolute;
    left: 0;
    top: 0;
    right: 0;
    bottom: 0;
    overflow: hidden;
    background: #f1f1f1;}