responsive design - Auto Fit inner div grid to outer column and

I have an image gallery that is overflowing its containing div. I have tried various solutions to no avail. What CSS code approach will fit the grid to the fixed-height outer div, including making

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javascript - Responsive centering in dense grid layout with repeat auto-fit - Stack Overflow

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Responsive layout with CSS grid, part 2: auto-fill & auto-fit - Code & Sundry

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A Very, Very In-Depth Guide on CSS Grid - CoderPad

How to make your HTML responsive by adding a single line of CSS, by Per Harald Borgen, We've moved to freeCodeCamp.org/news

javascript - Responsive centering in dense grid layout with repeat auto-fit - Stack Overflow

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