.hero-image{position:relative;overflow:hidden}.hero-image:after{content:"";position:absolute;top:0;left:0;right:0;bottom:0;background:radial-gradient(circle at center,transparent 0,rgba(0,0,0,.2) 100%);pointer-events:none}.dust-sprite{position:absolute;width:10px;height:10px;background-color:rgba(255,255,255,.6);border-radius:50%;filter:blur(1px);opacity:0;animation:float-dust 15s linear infinite}@keyframes float-dust{0%{transform:translateY(0) translateX(0);opacity:0}10%{opacity:.8}90%{opacity:.8}to{transform:translateY(-100px) translateX(50px);opacity:0}}