body{background:#333333;}

.base{width:100%; max-width:400px; margin-left:auto; margin-right:auto; display:flex; justify-content:center;}

.brilho{background:#ffffff; width:400px; height:400px; border-radius:50%; position:absolute; z-index:0; filter:blur(80px); opacity:0.4;}

img{width:100%; z-index:1;}