.left {
    width: 50%;
    float: left;
    max-width: 190px;
    margin-bottom: 15px;
}

.right {
    width: 50%;
    float: left;
    margin-bottom: 15px;
}

@media (max-width: 480px) {
    .left,
    .right {
        width: 100%;
        float: none;
    }
}