.block{width:fit-content;padding:20px;background:white;margin-top:10px;margin-bottom:20px;}
.effect6{position:relative;box-shadow:0 1px 4px rgba(0,0,0,0.3),0 0 10px rgba(0,0,0,0.1) inset;}
.effect6:before,.effect6:after{content:"";position:absolute;z-index:-1;box-shadow:0 0 20px rgba(0,0,0,0.8);top:50%;bottom:0;left:20px;right:20px;border-radius:100px/10px;}