.rbn{ width:250px; height:55px; padding:13px; background: radial-gradient(farthest-side at 50% 100%,#bce2e870 96%,blue 98%,transparent 100%) 50% 0/calc(100% - 60px) 30px no-repeat, radial-gradient(farthest-side at 50% 100%,transparent 96%,…