<div class="site">
  <div class="header">
    <h1>Title</h1>
  </div>
  <div class="menu">
    <span>Menu</span>
    <ul>
      <li>item1</li>
      <li>item2</li>
    </ul>
  </div>
  <div class="body">
    <p>Lorem ipsum dolor sit amet, consectetur adipiscing elit, sed do eiusmod tempor incididunt ut labore et dolore magna aliqua. Ut enim ad minim veniam, quis nostrud exercitation ullamco laboris nisi ut aliquip ex ea commodo consequat. 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.</p>
  </div>
  <div class="image">
    <img src="http://corneaflorin.ro/demo-images/background_img_01b.jpg" alt="">
  </div>
  <div class="tags">
    <span>tag1</span>
    <span>tag2</span>
    <span>tag3</span>
  </div>
  <div class="footer">
    <p>
      <h5>Footer text1</h5>
      <h5>Footer text2</h5>
    </p>
  </div>
</div>

.site {
  display: grid;
  grid-template-areas:
    'menu body header'
    'menu image tags'
    'menu image footer';
  grid-gap: 10px;
  grid-template-columns: 25% 50% 25%;
}
.header {
  grid-area: header;
  background-color: #333
}
.menu {
  grid-area: menu;
  background-color: #555
}
.body {
  grid-area: body;
  background-color: #e1e1e1;
}
.image {
  grid-area: image;
}
.tags {
  grid-area: tags;
  background-color: #999
}
.footer {
  grid-area: footer;
  background-color: #777;
}
@media only screen and (max-width: 800px) {
  .site {
    grid-template-areas:
      'menu'
      'header'
      'tags'
      'image'
      'body'
      'footer';
    grid-gap: 10px;
    grid-template-columns: 100%;
  }
  .menu ul li {
    display: inline;
  }
}




div {
  padding: 10px;
}
.image img {
  max-width: 100%;
}