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CSS Base

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    <div class="container">
      <h1>CSS Quickies</h1>
      <p class="p1">
        col 1 Lorem ipsum dolor sit, amet consectetur adipisicing elit. Eveniet at voluptas quo reprehenderit iusto labore rem architecto itaque placeat laboriosam aliquid inventore temporibus facere, aperiam odio eius earum illum dolorum.
      <p class="p2">
        col 2 Lorem ipsum dolor sit amet consectetur adipisicing elit. Ullam ducimus nostrum possimus id, similique reiciendis amet quo. Possimus enim sequi natus sint minus autem non laudantium cumque, ab nobis ipsam!
      <h2>I'm a sub header that spans the complete length</h2>
      <p class="p3">
        Lorem ipsum dolor sit amet consectetur, adipisicing elit. Libero blanditiis, facilis animi iusto eveniet corporis veniam aliquid excepturi voluptates totam, sed tenetur omnis, impedit id voluptas veritatis delectus similique vitae.


                .container {
  column-count: 3;
  column-width: 280px;
  column-rule: 3px dashed #ccc;
  column-gap: 20px;
  margin: 0;

h2 {
  column-span: all;
  background-color: #666;
  color: white;

  background-color: #f5f5f5;