Creating Equal Height Columns with Flexbox

.flex-container {
  display: flex;
  gap: 20px; /* Space between columns */
  align-items: stretch; /* Default, but explicit for clarity */
  padding: 20px;
  background-color: #eee;
  font-family: sans-serif;
}

.flex-item {
  flex: 1; /* Each item takes equal available space */
  padding: 15px;
  background-color: white;
  border: 1px solid #ddd;
  box-shadow: 0 2px 4px rgba(0,0,0,0.05);
}

.flex-item:nth-child(even) {
  /* Example of different content height for demonstration */
  min-height: 150px;
}

How it works: This snippet demonstrates how Flexbox effortlessly creates equal-height columns. By applying `display: flex` to the parent container, all its direct children become flex items. The `align-items: stretch` property (which is the default behavior for flex containers) ensures that all flex items stretch vertically to match the height of the tallest item, creating a visually consistent layout regardless of individual content length. `flex: 1` on the items allows them to grow and shrink equally to fill available horizontal space.