.box{position:relative;color:white;padding:20px;overflow:hidden;z-index:1}@property --angle{syntax:"<angle>";inherits:false;initial-value:0deg}.box:before{top:0;left:0;right:0;bottom:0;background:conic-gradient(from var(--angle),transparent 60%,blue);animation:spin 4s linear infinite}.box:after,.box:before{content:"";position:absolute;z-index:-1}.box:after{top:2px;left:2px;right:2px;bottom:2px;filter:blur(2px);background:#0F0F0F;border-radius:10px}@keyframes spin{0%{--angle:0deg}to{--angle:360deg}}