<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8" />
<meta name="viewport" content="width=device-width, initial-scale=1.0" />
<title>Three Column Responsive Layout</title>

<style>
  body {
    margin: 0;
    padding: 0;
    font-family: sans-serif;
  }

  /* Outer wrapper with left & right borders */
  .container {
    border-left: 6px solid #333;
    border-right: 6px solid #333;
    padding: 20px;
  }

  /* Three columns */
  .columns {
    display: flex;
    gap: 20px;
    justify-content: space-between;
    flex-wrap: wrap;
  }

  .column {
    flex: 1;
    min-width: 250px;
    display: flex;
    flex-direction: column;
    gap: 15px;
  }

  .column img {
    width: 100%;
    height: auto;
    border-radius: 8px;
    display: block;
  }
</style>
</head>

<body>
  <div class="container">
    <div class="columns">
      <!-- Column 1 -->
      <div class="column">
        <img src="https://via.placeholder.com/300x200" alt="Pic 1">
        <img src="https://via.placeholder.com/300x200" alt="Pic 2">
      </div>

      <!-- Column 2 -->
      <div class="column">
        <img src="https://via.placeholder.com/300x200" alt="Pic 3">
        <img src="https://via.placeholder.com/300x200" alt="Pic 4">
      </div>

      <!-- Column 3 -->
      <div class="column">
        <img src="https://via.placeholder.com/300x200" alt="Pic 5">
        <img src="https://via.placeholder.com/300x200" alt="Pic 6">
      </div>
    </div>
  </div>
</body>
</html>