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                <base href="">
    <img src="toubana-diver.jpg" srcset="toubana-diver.jpg 750w, toubana-diver-2x.jpg 1500w" alt="Photograph of a tattooed, shirtless dreadlocked man facing the ocean">
  <div class="mainContent">
  <h1>Lorem ipsum dolor sit amet</h1>
  <p>Consectetur adipisicing elit. Accusantium rem nisi dolores unde molestiae temporibus voluptatibus reiciendis illum tempora sequi omnis laborum, impedit repudiandae excepturi aliquam perspiciatis quidem consequuntur. Adipisci!
  <p>Duis aute irure dolor in reprehenderit in voluptate velit esse cillum dolore eu fugiat nulla pariatur. Excepteur sint occaecat cupidatat non proident, sunt in culpa qui officia deserunt mollit anim id est laborum.


                body {
  margin: 0;
  font-family: Avenir, Helvetica, san-serif;
article {
  max-width: 750px;
  width: 80%;
  margin: 0 auto;
article header img {
  width: 100%; height: auto;
@media all and (max-width: 750px) {
  article { width: 100%; }
  .mainContent {   
  padding-left: 2rem; 
  padding-right: 2rem;