.etailer-box {
    flex-wrap: wrap;
}

.etailer-btn {
    margin: 0 0.5em 0.5em 0 !important;
    color: #fff;
    font-size: 20px;
    padding: 8px 15px !important;
    background: #a50d0d; 
    text-align: center;
}

@media screen and ( max-width: 480px ) {
    .etailer-box {
        flex-direction: initial !important;
    }

    .etailer-btn {
        width: 100%;
        margin: 0 0 0.5em 0 !important;
    }
}