.heartbeat-btn{background-color:#d4af37;color:white;padding:12px 24px;border:none;border-radius:8px;cursor:pointer;font-size:16px;animation:heartbeat 1.5s infinite}@keyframes heartbeat{0%{transform:scale(1)}25%{transform:scale(1.1)}40%{transform:scale(1)}60%{transform:scale(1.1)}100%{transform:scale(1)}}