.hook_paymethods ul div.row {
    width: 19%;
    margin: 5px;
}

.hook_paymethods ul div.row .col-md-12 {
    margin: 0;
    padding:0;
}

#mercanet_payment_button a:after {
    content:" ";
}
.hook_paymethods ul div.row .col-md-12 #mercanet_payment_button img {
    display:block;
}

#mercanet_payment_button a {
    background-color: #FFF;
}

#mercanet_payment_button a:hover {
    background-color: #FFF;
}