core/modules/views/css/views-responsive-grid.css
/**
 * CSS for Views responsive grid style.
 */

.views-view-responsive-grid {
  --views-responsive-grid--layout-gap: 10px; /* Will be overridden by an inline style. */
  --views-responsive-grid--column-count: 4; /* Will be overridden by an inline style. */
  --views-responsive-grid--cell-min-width: 100px; /* Will be overridden by an inline style. */
}

.views-view-responsive-grid--horizontal {
  /**
   * Calculated values.
   */
  --views-responsive-grid--gap-count: calc(var(--views-responsive-grid--column-count) - 1);
  --views-responsive-grid--total-gap-width: calc(var(--views-responsive-grid--gap-count) * var(--views-responsive-grid--layout-gap));
  --views-responsive-grid-item--max-width: calc((100% - var(--views-responsive-grid--total-gap-width)) / var(--views-responsive-grid--column-count));
  --views-responsive-grid-item--calculated-min-width: min(100%, var(--views-responsive-grid--cell-min-width)); /* Ensure that cell minimum width does not overflow container. */

  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(max(var(--views-responsive-grid-item--calculated-min-width), var(--views-responsive-grid-item--max-width)), 1fr));
  gap: var(--views-responsive-grid--layout-gap);
}

.views-view-responsive-grid--vertical {
  margin-bottom: calc(var(--views-responsive-grid--layout-gap) * -1); /* Offset the bottom row's padding. */
  column-width: var(--views-responsive-grid--cell-min-width);
  column-count: var(--views-responsive-grid--column-count);
  column-gap: var(--views-responsive-grid--layout-gap);
}

.views-view-responsive-grid--vertical .views-view-responsive-grid__item > * {
  padding-bottom: var(--views-responsive-grid--layout-gap);
  page-break-inside: avoid;
  break-inside: avoid;
}
