Resizing Tiled / Mosiac Galleries?

I’ve tried working with their official support but have not gotten an answer in a few days.

I’m trying to get my mosaic gallery to be larger than it’s defaulting to but cannot seem to get it to behave?

The theme seems to auto-shrink mosaic galleries to 400~ pixels but I want it to be larger (and ideally responsive).

Example of a “page” allows the text to go full-width but not the gallery: https://www.isapagani.com/index.php/isa-pagani-design/

A portfolio-type that I have extended the content area to 775px and hidden the side bar (display:none) but the gallery still won’t get bigger? https://www.isapagani.com/index.php/portfolio/desigh-edit-ads/

As a regular blog post: https://www.isapagani.com/index.php/2014/05/isa-pagani-design/

The class I see is tiled-galleries and I have tried to manipulate that but it won’t respond.

Any ideas?