Goal: remove the gray border/box-shadow from a single multicolumn content container on the home page (Dawn 9.0.0) and make images appear larger.
Proposed solutions:
Sitewide CSS overrides: remove border and the pseudo-element shadow on multicolumn cards by targeting .multicolumn-card.content-container and .content-container:after.
Section-specific override: target the exact section ID (e.g., #shopify-section-…__multicolumn) to disable only that section’s box-shadow, avoiding global impact.
Spacing/size tweaks: adjust .multicolumn-card-spacing margins; increase container width in theme settings to enlarge images. A later tip suggested zeroing margins/padding for the multicolumn spacing in a color-background section.
Outcome: the author confirmed the CSS fixes worked and marked the issue as resolved. No further action required.
Notes:
The section-specific selector is preferable if changes should apply only to that one section.
Image size increase was addressed via theme settings rather than CSS in the thread.