.snow2021{ -webkit-box-sizing:border-box; 
    -moz-box-sizing:border-box; 
    box-sizing:border-box; 
    width: 100%; height: 100%; float: left; position: relative;} 
    .snow2021:before{ content:" ";display:block;position:absolute;
        top:0;
        /* left:-50%; */
        /* width:200%; */
        width:100%;
        height:100%;
        z-index:1; 
        -webkit-background-size:15rem 15rem; 
        -moz-background-size:15rem 15rem; 
        background-size:15rem 15rem; 
        background-image:url("../wap_images/falling-snow2.png"); 
        -webkit-animation:snow 28s linear infinite; 
        -moz-animation:snow 28s linear infinite; 
        -o-animation:snow 28s linear infinite; 
        -ms-animation:snow 28s linear infinite; 
        animation:snow 28s linear infinite;opacity:0; 
        -ms-filter:"progid:DXImageTransform.Microsoft.Alpha(Opacity=0)";
         filter:alpha(opacity=0); -webkit-transition:opacity 10s; 
         -moz-transition:opacity 10s; 
         -o-transition:opacity 10s; -ms-transition:opacity 10s; transition:opacity 10s } 
    .snow2021:after{ content:" ";display:block;position:absolute;
            top:0;
            /* left:-50%; */
            /* width:200%; */
            width:100%;