.join_btn a {
    color: #ffa000;
    font-size: 18px;
    text-decoration: none !important;
    display: block;
    width: 150px;
    height: 50px;
    line-height: 50px;
    margin: 350px auto;
    text-align: center;
    background: #fbe9cd;
    border-radius: 8px;
    cursor: pointer;
}

.join_btn a:hover {
    color: #ffa000;
    background: #fff;
}