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

.float-btn {
    display: inline-block;
    background-color: #0073aa;
    color: #fff;
    border-radius: 50%;
    text-align: center;
    text-decoration: none;
    font-weight: bold;
    box-shadow: 0 4px 6px rgba(0,0,0,0.2);
    transition: transform 0.2s;
}

.float-btn:hover {
    transform: scale(1.1);
}

/* Mỗi nút 1 màu riêng */
.float-btn.zalo { background-color: #8F0202; }
.float-btn.call { background-color: #8F0202; }