.post-img-shadow {
    box-shadow: 1px 3px 15px 4px #DBDBDB;
    margin: 30px;
}

.btn-dark {
    color: #fff;
    background-color: #343a40;
    border-color: #343a40;
}

.btn-dark:hover {
    color: #fff;
    background-color: #23272b;
    border-color: #1d2124;
}