/* override */

.wp-block-file:not(.wp-element-button) {
    font-size: 100%;
}

.wp-block-file *+.wp-block-file__button {
    margin-left: 0.75em;
    
    display: inline-block;
    color: #fff;
    background-color: #1954dc;
    padding: 5px 20px;
    margin-bottom: -5px;
    
    border-radius: 5px;
    text-decoration: none;
}


/* add */

.wp-block-file .wp-block-file__button.single {

    display: inline-block;
    color: #fff;
    background-color: #1954dc;
    padding: 5px 20px;
    margin-bottom: -5px;
    
    border-radius: 5px;
    text-decoration: none;
}