@keyframes float{0%{transform:translateY(0)}50%{transform:translateY(-2px)}to{transform:translateY(0)}}.button{position:fixed;bottom:20px;right:20px;background-color:#25d366;color:#fff;border-radius:50%;padding:15px;box-shadow:0 8px 15px rgba(0,0,0,.3);display:flex;justify-content:center;align-items:center;text-decoration:none;z-index:1000;animation:float 1s ease-in-out infinite}