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HTML

              
                <main>
  <article>
    <h1>H1 Heading</h1>
    <p>Lorem ipsum dolor sit amet, consectetur adipiscing elit. Donec eleifend semper ligula et rhoncus. Nunc tristique, mi nec facilisis malesuada, leo leo elementum est, id consectetur ex metus non risus. Aliquam sit amet nulla mauris. Fusce vel vestibulum urna. Cras sit amet posuere dui. Morbi nunc quam, dapibus in lectus faucibus, posuere ullamcorper nulla. Nunc id dictum est. Sed et est non diam posuere dictum eget sit amet felis. Nam interdum, metus quis porttitor porta, sem lacus consectetur enim, a vulputate urna nibh id sem.</p>
    <p>Fusce a metus tortor. Curabitur tincidunt venenatis dolor, at molestie orci auctor sed. Curabitur pretium nulla arcu, sed vehicula enim dignissim nec. Vestibulum ante ipsum primis in faucibus orci luctus et ultrices posuere cubilia curae; Nunc lobortis feugiat mollis. Nullam eleifend, nisi faucibus viverra egestas, dui ex iaculis dui, nec tempor enim elit non nibh. Aliquam et tellus eget dolor tincidunt accumsan at at tellus.</p>
 </article>

  <img src="https://images.unsplash.com/photo-1596295927468-f6404594bfbb?ixlib=rb-1.2.1&q=85&fm=jpg&crop=entropy&cs=srgb&ixid=eyJhcHBfaWQiOjE0NTg5fQ&auto=format&fit=crop&w=1960&q=80" alt="black & white image">

  <article>
    <p>Vivamus euismod ipsum massa, sed consequat sapien accumsan et. Donec vitae elementum est, quis pharetra sem. Lorem ipsum dolor sit amet, consectetur adipiscing elit. Lorem ipsum dolor sit amet, consectetur adipiscing elit. Pellentesque habitant morbi tristique senectus et netus et malesuada fames ac turpis egestas.</p>
    <p>Pellentesque porta ut ipsum et rhoncus. Ut augue elit, porta vel metus eu, mattis dignissim purus. Suspendisse potenti. Donec a porta tellus, eu hendrerit dolor. Phasellus interdum rhoncus mauris et consectetur. Vivamus pretium magna eu turpis vulputate mattis at in nibh. Interdum et malesuada fames ac ante ipsum primis in faucibus.</p>
    <p>Proin consequat nibh ex, sit amet commodo lacus porta eu. Phasellus quis enim et quam ornare fringilla. Aliquam vestibulum pretium ultrices. In cursus feugiat sagittis. Donec posuere dui non lorem bibendum ultrices. Suspendisse in felis nec sem sodales sodales sed non magna. Pellentesque sit amet eleifend erat. Nullam sed commodo lacus. </p>
  </article>

    <div class="auto--grid">
    <img src="https://images.unsplash.com/photo-1596295927468-f6404594bfbb?ixlib=rb-1.2.1&q=85&fm=jpg&crop=entropy&cs=srgb&ixid=eyJhcHBfaWQiOjE0NTg5fQ&auto=format&fit=crop&w=768&q=80" alt="black & white image">
    <img src="https://images.unsplash.com/photo-1596295927468-f6404594bfbb?ixlib=rb-1.2.1&q=85&fm=jpg&crop=entropy&cs=srgb&ixid=eyJhcHBfaWQiOjE0NTg5fQ&auto=format&fit=crop&w=768&q=80" alt="black & white image">
    <img src="https://images.unsplash.com/photo-1596295927468-f6404594bfbb?ixlib=rb-1.2.1&q=85&fm=jpg&crop=entropy&cs=srgb&ixid=eyJhcHBfaWQiOjE0NTg5fQ&auto=format&fit=crop&w=768&q=80" alt="black & white image">
    <img src="https://images.unsplash.com/photo-1596295927468-f6404594bfbb?ixlib=rb-1.2.1&q=85&fm=jpg&crop=entropy&cs=srgb&ixid=eyJhcHBfaWQiOjE0NTg5fQ&auto=format&fit=crop&w=768&q=80" alt="black & white image">
          <img src="https://images.unsplash.com/photo-1596295927468-f6404594bfbb?ixlib=rb-1.2.1&q=85&fm=jpg&crop=entropy&cs=srgb&ixid=eyJhcHBfaWQiOjE0NTg5fQ&auto=format&fit=crop&w=768&q=80" alt="black & white image">
    <img src="https://images.unsplash.com/photo-1596295927468-f6404594bfbb?ixlib=rb-1.2.1&q=85&fm=jpg&crop=entropy&cs=srgb&ixid=eyJhcHBfaWQiOjE0NTg5fQ&auto=format&fit=crop&w=768&q=80" alt="black & white image">
    </div>

  <section>
    <h2>H2 Heading</h2>
    <p>Pellentesque porta ut ipsum et rhoncus. Ut augue elit, porta vel metus eu, mattis dignissim purus. Suspendisse potenti. Donec a porta tellus, eu hendrerit dolor. Phasellus interdum rhoncus mauris et consectetur. Vivamus pretium magna eu turpis vulputate mattis at in nibh. Interdum et malesuada fames ac ante ipsum primis in faucibus. Vivamus luctus, massa eget lacinia consequat, orci ante suscipit felis, eget eleifend enim felis in lacus. Sed hendrerit vel sem sed volutpat.</p>
    <p>Proin consequat nibh ex, sit amet commodo lacus porta eu. Phasellus quis enim et quam ornare fringilla. Aliquam vestibulum pretium ultrices. In cursus feugiat sagittis. Donec posuere dui non lorem bibendum ultrices. Suspendisse in felis nec sem sodales sodales sed non magna. Pellentesque sit amet eleifend erat. Nullam sed commodo lacus. </p>
  </section>
</main>
              
            
!

CSS

              
                :root {
  --gap-unit: 1rem;
}

main *:not(img):not(div) {
  max-width: 65ch;
  margin: 2rem auto;
}

main img {
  display: block;
  max-width: 100%;
}

/* General */
body {
  margin: 0;
  font-family: Arial, sans-serif;
  font-size: 18px;
  line-height: 1.5;
  letter-spacing: 0.06em;
  word-spacing: 0.04em;
}

.centered {
    display: grid;
  place-content: center;
}

article,
section {
  padding: 0 1rem;
}

.auto--grid {
  display: grid;
  grid-template-columns: repeat(
    auto-fill,
    minmax(var(--auto-grid-min-size, 18rem), 1fr)
  );
  grid-gap: var(--gap-unit);
}

@media only screen and (min-width: 768px) {
  .auto--grid {
    --gap-unit: 1.5rem;
  }
}

@media only screen and (min-width: 1220px) {
  .auto--grid {
    --gap-unit: 2rem;
  }
}

              
            
!

JS

              
                
              
            
!
999px

Console