.overlay{background:rgba(0,0,0,.5);height:100%;left:0;opacity:0;position:fixed;top:0;transition:opacity .3s ease;visibility:hidden;width:100%;z-index:10}.overlay.active{opacity:1;visibility:visible}.floating-btn-container{bottom:20px;position:fixed;right:20px;z-index:20}.floating-btn{align-items:center;background:#007bff;box-shadow:0 5px 10px rgba(0,0,0,.3);display:flex;font-size:24px;height:60px;justify-content:center;transition:transform .3s ease;width:60px}.extra-btn,.floating-btn{border:none;border-radius:50%;color:#fff;cursor:pointer}.extra-btn{background:#28a745;height:50px;opacity:0;position:absolute;right:5px;transform:translateY(0);transition:all .3s ease;width:50px}.extra-btn,.extra-btn:nth-child(2){bottom:70px}.extra-btn:nth-child(3){bottom:130px}.extra-btn.show{opacity:1;transform:translateY(-10px)}