<div class="container">
  <q>The surest sign that intelligent life exists elsewhere in the universe is that it has never tried to contact us.</q>
  <p>—<cite>Bill Watterson</cite></p>
</div>

@layer base, demo;

@layer demo {
  .container {
    border-width: 3rem;
    border-style: solid;
    border-image-source: url("https://assets.codepen.io/9632/esssveegeeee.svg");
    padding: 1.5rem;
    width: 500px;
  }
}

@layer base {
  body {
    display: grid;
    font-size: 1.5rem;
    place-items: center;
    height: 100vh;
  }

  .container {
    display: grid;
    place-items: center;
  }
}