.qcb-floating-container {
    position: fixed;
    bottom: 20px;
    right: 20px;
    display: flex;
    flex-direction: column;
    gap: 10px;
    z-index: 9999;
}

.qcb-btn {
    width: 50px;
    height: 50px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    color: #fff;
    text-decoration: none;
    font-weight: bold;
    box-shadow: 0 4px 10px rgba(0,0,0,0.2);
    transition: transform 0.3s ease;
}

.qcb-btn:hover {
    transform: scale(1.1);
    color: #fff;
}

.qcb-phone { background-color: #28a745; }
.qcb-zalo { background-color: #0068ff; font-size: 14px;}
.qcb-mess { background-color: #0084ff; font-size: 14px;}