.modal_update_block_cat {
    position: fixed;
    top: calc(50vh - 150px);
    left: calc(50% - 170px);
    width: 340px;
    padding: 15px;
    background: white;
    box-shadow: 0 0 8px 0 rgba(0,0,0,.52);
    border-radius: 12px;
    overflow-y: scroll;
    flex-direction: column;
}