.floating-buttons {
    position: fixed;
    right: 20px;
    bottom: 80px;
    display: flex;
    flex-direction: column;
    gap: 12px;
    z-index: 999;
}

.floating-buttons .btn {
    width: 50px;
    height: 50px;
    border-radius: 50%;
    background: #fff;
    display: flex;
    align-items: center;
    justify-content: center;
    box-shadow: 0 4px 10px rgba(0,0,0,0.2);
    cursor: pointer;
    color: black;
    transition: 0.3s;
}

.floating-buttons .btn img {
    width: 26px;
    height: 26px;
}

/* Màu riêng */
.zalo { background: #008fe5; }
.fb { background: #1877f2; }
.tiktok { background: #000; color: #fff; }
.top { background: #ff4d4f; color: #fff; font-size: 20px; }

/* Hover */
.floating-buttons .btn:hover {
    transform: scale(1.1);
}