.card{overflow:hidden;background-color:#58a6ac}.card:before{content:"";position:absolute;top:0;right:0;bottom:0;left:0;pointer-events:none;background:radial-gradient(200px circle at var(--x) var(--y),#120e50,transparent);opacity:0;transition:opacity .3s ease}.card:hover:before{opacity:1}