body,html{background-color:#000}body{min-height:100vh}.bubble{position:relative;background:#fff;color:#000;text-align:center;width:auto;height:auto;border-radius:.5rem;padding:2rem;margin:20px auto}.bubble:after{content:"";position:absolute;display:block;width:0;z-index:1;border-color:#fff transparent;border-style:solid;border-width:1rem 1rem 0;bottom:-1rem;left:50%;margin-left:-1rem}