.wp-pagenavi {
    clear: both;
    text-align: center;
    border-top: 1px solid #aaa;
    border-bottom: 1px solid #aaa;
    padding: 20px 0;
    margin-top: 50px;
}
.wp-pagenavi a, .wp-pagenavi span {
    text-decoration: none;
    border: 1px solid #BFBFBF;
    padding: 5px 9px;
    margin: 2px;
}