.content-pagination span {
    padding: 5px 14px;
    border-width:1px;
    border-style:solid;
    max-width:45%;
}
.content-pagination .content-archivep {
    float:left;
}
.content-pagination .content-archiven {
    float:right;
}

@media (max-width:768px) {
    .content-pagination .content-archivep,
    .content-pagination .content-archiven {
        float:none;
        clear: both;
        display:block;
        width:100%;
        border-radius: 0px;
        max-width:100%;
        margin-bottom:10px;
    }
}