Flexbox: Equal Height Columns with Item Wrapping

.container {
  display: flex;
  flex-wrap: wrap;
  align-items: stretch; /* Ensures all items in the same row have equal height */
  gap: 20px; /* Space between items */
  padding: 20px;
  background-color: #f9f9f9;
}

.item {
  flex: 1 1 calc(33% - 20px); /* Approx 3 items per row with gap */
  background-color: #ffffff;
  border: 1px solid #ddd;
  padding: 15px;
  box-sizing: border-box;
  display: flex; /* Can use flex inside for internal content alignment */
  flex-direction: column;
}

How it works: This Flexbox snippet demonstrates how to create a responsive layout where items maintain equal height, even when they wrap onto multiple rows. `display: flex` combined with `flex-wrap: wrap` allows items to move to a new line when space is insufficient. The key here is `align-items: stretch` on the container, which stretches all flex items along the cross-axis to fill the container, effectively making them all the same height within their respective rows. `gap` provides consistent spacing between items.