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  <nav>Hello Simple Grid</nav>
    <section class="bigly">
      <p>Lorem ipsum dolor, sit amet consectetur adipisicing elit. Debitis dicta similique quam fuga laborum earum ea adipisci possimus cupiditate atque libero accusamus iusto inventore optio, nisi, modi obcaecati! Eveniet, illum!</p>
      <p>Non maiores placeat officia, quisquam excepturi quam quod cum et dignissimos laudantium, doloremque natus voluptas aperiam similique saepe alias optio corporis accusantium. Sunt earum in esse facere optio veritatis aperiam.</p>
      <p>Et dolores obcaecati cupiditate fuga eum voluptas, dicta ut magni consequuntur ipsa illo? Tempore, amet delectus neque iste earum voluptates veniam, sint excepturi ab soluta facere, qui explicabo temporibus inventore.</p>
      <p>Harum enim quae provident laborum veritatis at libero odit, nostrum sapiente hic pariatur consectetur omnis iste aperiam ullam, officia repudiandae maxime facere voluptates repellendus praesentium esse sit beatae. Ullam, esse.</p>
      <p>Tenetur repellat pariatur aut ad officiis possimus? Nesciunt commodi eum dolore quis distinctio perferendis sequi sapiente odit officia provident, rerum libero et dolores molestias. Quae voluptatum dicta laboriosam maiores qui.</p>
    About | Contact | Etc...


                html, body {
  margin: 0;
  padding: 0;

app {
  height: 100vh;
  display: grid;
  grid-template-rows: auto 1fr auto;
  nav, footer {
    background-color: cornflowerblue;
    padding: 5px 10px;
  main {
    background-color: white;
    padding: 10px;
    overflow-y: auto;
    .bigly {
      //overflow-y Doesn't matter here, has to be on the outer element...
      //overflow-y: auto; 
      padding: 5px;
      height: 1000px; //force overflow
      background-color: silver;
      p {
        margin: 0;
        + p {
          margin-top: 15px;