/* can't remember if this is needed, but it doesn't hurt */
* { box-sizing: border-box; }

/* adjust vmin value for space between columns */
#img-container { display: grid; grid-gap: 0 2.75vmin; }

/* change vmin for border under images/title */
.column .asset-holder { line-height: 0; margin-bottom: 2.75vmin; }
.column a { line-height: 0; display: block; width: 100%; height: 100%; }
.column img { width: 100%; line-height: 0; }

/* text settings - as you wish */
.column .texts .captioning { line-height: 1.4em; }
.column .texts .captioning h3 { text-align: center; margin: 1vmin 10% 0 10%; font-weight: normal; }
.column .texts .captioning p { text-align: center; padding: 0 10%; margin-bottom: 0 !important; }