.wp-block-my-plugin-category-filter-block,.wp-block-my-plugin-title-input-block {
    padding: 10px;
}
.category-filter-block label,.wp-block-my-plugin-category-filter-block label,.wp-block-my-plugin-title-input-block label {
    font-weight: bold;
    display: block;
    margin-bottom: 5px;
}

.category-filter-block select,.wp-block-my-plugin-category-filter-block select,.wp-block-my-plugin-title-input-block input{
    width: 100%!important;
    padding: 7px;
    margin:6px 0px;
}