*{box-sizing:border-box}body{margin:0;min-height:100vh;font-family:-apple-system,BlinkMacSystemFont,Segoe UI,Roboto,Helvetica Neue,Arial,sans-serif}@keyframes ring{0%{transform:rotate(0)}10%{transform:rotate(15deg)}20%{transform:rotate(-15deg)}30%{transform:rotate(15deg)}40%{transform:rotate(-15deg)}50%{transform:rotate(15deg)}60%{transform:rotate(-15deg)}70%{transform:rotate(0)}to{transform:rotate(0)}}.bell-ringing{animation:ring .5s ease-in-out 3}