<main class="canvas-container">
  <h1>This sorta looks like a standard document already, right?</h1>
</main>
body {
  background: lightgray;
}

.canvas-container {
    margin: 0 auto; /* for centering, feel free to use flexbox or some other method*/
  box-sizing: border-box;
  padding: 0.5in; /* controls margins */
  width: 8.5in;
  height: 11in;
  background-color: white;
  box-shadow: 0 3px 8px -3px rgba(0, 0, 0, 0.7);
}

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