.vira-contact-button {
    position: fixed;
    bottom: 30px;
    left: 20px;
    z-index: 9999;
    display: flex;
    flex-direction: column;
    gap: 10px;
    font-family: Arial, sans-serif;
}

.vira-contact-button a {
    display: flex;
    align-items: center;
    gap: 8px;
    padding: 8px 14px;
    border-radius: 50px;
    color: #fff;
    text-decoration: none;
    font-size: 14px;
    font-weight: 600;
    box-shadow: 0 4px 10px rgba(0,0,0,.2);
    transition: transform .2s ease;
}

.vira-contact-button a:hover {
    transform: scale(1.05);
}

.vira-zalo { background:#0068ff; }
.vira-call { background:#d9534f; }
.vira-messenger { background:#0a7cff; }
.vira-email { background:#555; }
.vira-map { background:#2e7d32; }

.vira-contact-button img {
    width: 28px;
    height: 28px;
}

@media (max-width:768px){
    .vira-contact-button{
        flex-direction: row;
        left:0;
        right:0;
        bottom:0;
        justify-content: space-around;
        background:#1f2a44;
        padding:6px 0;
    }
    .vira-contact-button a{
        flex-direction: column;
        border-radius:0;
        background:transparent;
        box-shadow:none;
        font-size:11px;
    }
}