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HTML

CSS

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+ add another resource

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HTML

              
                <header>
  <h1>This is my awesome title</h1>
</header>
<div id="main">
  <article>
    <h1>Main</h1>
    <p>Leave dead animals as gifts unwrap toilet paper<p>
    
    <p>Use lap as chair eat grass, throw it back up yet destroy the blinds but wake up human for food at 4am so meow my left donut is missing, as is my right, favor packaging over toy. The dog smells bad caticus cuteicus for claw drapes meow for human give me attention meow sit in box stare at ceiling. Find something else more interesting human give me attention meow. Eat from dog's food refuse to leave cardboard box. Scratch the furniture hide head under blanket so no one can see and sleep in the bathroom sink destroy couch as revenge scratch the furniture sweet beast, for have secret plans. Eat grass, throw it back up get video posted to internet for chasing red dot but eat and than sleep on your face. Sweet beast i like big cats and i can not lie, or loves cheeseburgers get video posted to internet for chasing red dot swat at dog, for cat slap dog in face but burrow under covers. Instantly break out into full speed gallop across the house for no reason the dog smells bad lick arm hair. Chase red laser dot lounge in doorway or under the bed. Kitty loves pigs hide head under blanket so no one can see. Swat at dog chase laser hiss at vacuum cleaner lounge in doorway behind the couch, or lick arm hair stretch. Sleep in the bathroom sink hopped up on catnip then cats take over the world for have secret plans vommit food and eat it again.</p>


  </article>
  <nav>
    <h1>Nav</h1>
  </nav>
  <aside>
    <h1>Sidebar</h1>
  </aside>
</div>
<footer>
  <h1>Footer content</h1>
</footer>
              
            
!

CSS

              
                body {
  padding: 2vw;
}

#main { 
  display: flex;
}

header, 
footer,
#main > article,
#main > nav,
#main > aside {
  border: 1px solid red;
  padding: 2vw;
}

#main > article { 
  order: 2; 
  min-width: 12em; 
  flex:1;
}
#main > nav { 
  order: 1; 
  width: 200px; 
}

#main > aside {
  order: 3; 
  width: 200px;
}

article p:first-of-type {
  font-size: 1.25em;
  font-style: italic;
}

@media all and (max-width: 800px) {
  /* 
    Too narrow to support three columns 
  */
  #main {
    flex-flow: column;
  }
  
  #main > article, 
  #main > nav, 
  #main > aside {
    /* Return them to document order */
    order: 0;
    padding: 5vw;
    width: auto;
  }
}
              
            
!

JS

              
                
              
            
!
999px

Console