Brine Gallery Padding

Do you want to remove the padding on every gallery on the template or just the one you posted?

Btw please provide the password to access the page

I created a demo brine template with a gallery-page, if it similar to your set up ,try this snippet

https://bulldog-garlic-e68s.squarespace.com/fluid-gallery/ pass: 1234

To add CSS, go to Design -> Custom CSS

.sqs-system-gallery {
  margin: -80px;
}
.sqs-system-gallery img {
  width: 100% !important;
  height: auto !important;
  left: 0 !important;
}