* {
        box-sizing: border-box;
    }
    
    html {
        position: fixed;
        overflow: hidden;
    }
    
    body {
        margin: 0px;
        position: fixed;
        overflow: hidden;
        width: 100%;
        height: 100%;
    }
    
    body * {
        -ms-user-select: none;
        -webkit-user-select: none;
        -moz-user-select: none;
        user-select: none;
    }
    
    #canvas {
        width: 100%;
        height: 100%;
        outline: 0;
        touch-action: none;
    }
    
    #loader {
        position: fixed;
        top: 50%;
        left: 50%;
    }