CSS Multi-column Layout

#example-element {
  width: 100%;
  text-align: left;
}

<section id="default-example">
  <p id="example-element">
    London. Michaelmas term lately over, and the Lord Chancellor sitting in
    Lincoln's Inn Hall. Implacable November weather. As much mud in the streets
    as if the waters had but newly retired from the face of the earth, and it
    would not be wonderful to meet a Megalosaurus, forty feet long or so,
    waddling like an elephantine lizard up Holborn Hill.
  </p>
</section>

#example-element {
  width: 100%;
  height: 90%;
  columns: 3;
  text-align: left;
}

<section id="default-example">
  <p id="example-element">
    London. Michaelmas term lately over, and the Lord Chancellor sitting in
    Lincoln's Inn Hall. Implacable November weather.
  </p>
</section>

ol {
  column-width: 150px;
  gap: 2em;
  column-height: 3em;
}

<ol>
  <li>One fish</li>
  <li>Two fish</li>
  <li>Red fish</li>
  <li>Blue fish</li>
  ...
</ol>
<p>-- Dr. Seuss</p>

<ol>
  <li>One fish</li>
  <li>Two fish</li>
  <li>Red fish</li>
  <li>Blue fish</li>
  <li>Black fish</li>
  <li>Blue fish</li>
  <li>Old fish</li>
  <li>New fish.</li>
  <li>This one has a little star.</li>
  <li>This one has a little car.</li>
  <li>Say! What a lot</li>
  <li>Of fish there are.</li>
  <li>Yes. Some are red. And some are blue.</li>
  <li>Some are old. And some are new.</li>
  <li>Some are sad.</li>
  <li>And some are glad.</li>
  <li>And some are very, very bad.</li>
  <li>Why are they</li>
  <li>Sad and glad and bad?</li>
  <li>I do not know.</li>
  <li>Go ask your dad.</li>
  <li>Some are thin.</li>
  <li>And some are fat.</li>
  <li>The fat one has</li>
  <li>A yellow hat.</li>
  <li>From there to here, from here to there,</li>
  <li>Funny things</li>
  <li>Are everywhere.</li>
</ol>
<p>--Dr. Seuss</p>

.multicol-element {
  width: 100%;
  text-align: left;
  column-count: 3;
}

.multicol-element p {
  margin: 0;
}

#example-element {
  background-color: rebeccapurple;
  padding: 10px;
  color: white;
}

<section id="default-example">
  <div class="multicol-element">
    <p>
      London. Michaelmas term lately over, and the Lord Chancellor sitting in
      Lincoln's Inn Hall.
    </p>
    <div id="example-element">Spanner?</div>
    <p>
      Implacable November weather. As much mud in the streets as if the waters
      had but newly retired from the face of the earth, and it would not be
      wonderful to meet a Megalosaurus, forty feet long or so, waddling like an
      elephantine lizard up Holborn Hill.
    </p>
  </div>
</section>

ol {
  column-width: 150px;
  gap: 2em;
  column-height: 3em;
}

<ol>
  <li>One fish</li>
  <li>Two fish</li>
  <li>Red fish</li>
  <li>Blue fish</li>
  ...
</ol>
<p>-- Dr. Seuss</p>

<ol>
  <li>One fish</li>
  <li>Two fish</li>
  <li>Red fish</li>
  <li>Blue fish</li>
  <li>Black fish</li>
  <li>Blue fish</li>
  <li>Old fish</li>
  <li>New fish.</li>
  <li>This one has a little star.</li>
  <li>This one has a little car.</li>
  <li>Say! What a lot</li>
  <li>Of fish there are.</li>
  <li>Yes. Some are red. And some are blue.</li>
  <li>Some are old. And some are new.</li>
  <li>Some are sad.</li>
  <li>And some are glad.</li>
  <li>And some are very, very bad.</li>
  <li>Why are they</li>
  <li>Sad and glad and bad?</li>
  <li>I do not know.</li>
  <li>Go ask your dad.</li>
  <li>Some are thin.</li>
  <li>And some are fat.</li>
  <li>The fat one has</li>
  <li>A yellow hat.</li>
  <li>From there to here, from here to there,</li>
  <li>Funny things</li>
  <li>Are everywhere.</li>
</ol>
<p>--Dr. Seuss</p>

#example-element {
  min-width: 21rem;
  text-align: left;
}

<section id="default-example">
  <p id="example-element">
    London. Michaelmas term lately over, and the Lord Chancellor sitting in
    Lincoln's Inn Hall. Implacable November weather. As much mud in the streets
    as if the waters had but newly retired from the face of the earth, and it
    would not be wonderful to meet a Megalosaurus, forty feet long or so,
    waddling like an elephantine lizard up Holborn Hill.
  </p>
</section>

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  font-family: "Helvetica", "Arial", sans-serif;
}

ul {
  width: 100vw;
  height: 300px;
  padding: 10px;

  overflow-x: scroll;
  scroll-snap-type: x mandatory;

  columns: 1;
  text-align: center;
}

li {
  list-style-type: none;

  display: inline-block;
  height: 100%;
  width: 200px;
  text-align: left;

  background-color: #eeeeee;
  outline: 1px solid #dddddd;
  padding: 0 20px;
  margin: 0 10px;
}

li:nth-child(even) {
  background-color: cyan;
}

ul::column {
  scroll-snap-align: center;
}

<ul>
...
  <li>
    <h2>Item 1</h2>
  </li>
...
</ul>

<ul>
  <li>
    <h2>Item 1</h2>
  </li>
  <li>
    <h2>Item 2</h2>
  </li>
  <li>
    <h2>Item 3</h2>
  </li>
  <li>
    <h2>Item 4</h2>
  </li>
  <li>
    <h2>Item 5</h2>
  </li>
  <li>
    <h2>Item 6</h2>
  </li>
  <li>
    <h2>Item 7</h2>
  </li>
  <li>
    <h2>Item 8</h2>
  </li>
  <li>
    <h2>Item 9</h2>
  </li>
  <li>
    <h2>Item 10</h2>
  </li>
  <li>
    <h2>Item 11</h2>
  </li>
  <li>
    <h2>Item 12</h2>
  </li>
  <li>
    <h2>Item 13</h2>
  </li>
  <li>
    <h2>Item 14</h2>
  </li>
  <li>
    <h2>Item 15</h2>
  </li>
</ul>