<pre><code>code {
  -webkit-user-select: all;
  user-select: all;
  display: block;
  padding: 20px;
  border: 1px dashed #999;
  color: #31808c;
  background-color: #fff;
  text-align: left;
  overflow: auto;
}</code></pre>
*, *::before, *::after {
  box-sizing: border-box;
}

html, body {
  height: 100%;
}

body {
  display: grid;
  align-items: center;
  justify-items: center;
  margin: 0;
  color: #333;
  background-color: #ddd;
  text-align: center;
}

pre {
  margin: 0;
  width:600px;
}

code {
  -webkit-user-select: all;
  user-select: all;
  display: block;
  font-size:16px;
  padding: 20px;
  border: 1px dashed #999;
  color: #31808c;
  background-color: #fff;
  text-align: left;
  overflow: auto;
}

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