How to remove side padding from Promotional Grid Impulse Theme

Good day,

When including a third Advanced Block at the Promotional Grid the side padding appeared again. How can I remove it?

Note: Only the side padding, not the padding in between each advanced block.

Kind regards,
Els

Hello @lagentilestore
Please provide screenshot of grid.

My excuse! Forgot to include it. I am talking about the white line left from the purple image.

Hello @lagentilestore
Go to online store ----> themes ----> actions ----> edit code ---->base.css
add this code at the end of the file and save.

.flex-grid--template--23623613415757__promo_grid_WejeYc .flex-grid__item {
padding-left: 0px !important;
}

Thanks

Thank you! Is it possible that I don’t have the bace.css? Please see attached.
I do have theme.css.liquid.