<header id="wrapper">
  <h1 id="logo">Resources</h1>
  <nav>
    <ul id="flex-container">
      <li class="flex-item"><a href="https://coolors.co/" target="_blank">Coolers</a></li>
      <li class="flex-item"><a href="https://colours.neilorangepeel.com/" target="#">CSS Colours</a></li>
      <li class="flex-item"><a href="https://css-tricks.com/" target="_blank">CSS Tricks</a></li>
      <li class="flex-item"><a href="https://caniuse.com/" target="_blank">CSS Browser Compatibility</a></li>
    </ul>
  </nav>
</header>

<main id="main-flex">
  <section>
    <div>
      <iframe 
         width="460" 
         height="315" 
         src="https://www.youtube.com/embed/f02mOEt11OQ" 
         frameborder="0" 
         allow="accelerometer; autoplay; encrypted-media; gyroscope; picture-in-picture" 
         allowfullscreen>
      </iframe>
    </div>
  </section>
  
  <section>
    <div>
      <iframe 
        width="460" 
        height="315" src="https://www.youtube.com/embed/zFhfksjf_mY"
        frameborder="0" 
        allow="accelerometer; autoplay; encrypted-media; gyroscope; picture-in-picture" 
        allowfullscreen>
      </iframe>
    </div>
  </section>
  
  <section>
    <div>
      <iframe 
      width="460" 
      height="315" 
      src="https://www.youtube.com/embed/dLmyp3xMsAo" 
      frameborder="0" 
      allow="accelerometer; autoplay; encrypted-media; gyroscope; picture-in-picture" 
      allowfullscreen>
     </iframe>
    </div>
  </section>
  
  <section>
    <div>
      <iframe 
         width="460" 
         height="315" 
         src="https://www.youtube.com/embed/HoCAUlmc6lk" 
         frameborder="0" 
         allow="accelerometer; autoplay; encrypted-media; gyroscope; picture-in-picture" 
         allowfullscreen>
     </iframe>
    </div>
  </section>
  
  <section>
    <div>
      <iframe 
         width="460" 
         height="315" 
         src="https://www.youtube.com/embed/zPyg4N7bcHM" 
         frameborder="0" 
         allow="accelerometer; autoplay; encrypted-media; gyroscope; picture-in-picture" 
         allowfullscreen>
      </iframe>
    </div>
  </section>
  
  <section>
    <div>
      <iframe 
         width="460" 
         height="315" 
         src="https://www.youtube.com/embed/hBkcwy-iWt8"                    
         frameborder="0" 
         allow="accelerometer; autoplay; encrypted-media; gyroscope; picture-in-picture" 
         allowfullscreen>
     </iframe>
    </div>
  </section>
  
  <section>
    <div>
      <iframe 
         width="460" 
         height="315" 
         src="https://www.youtube.com/embed/NhK8Ehv6aPI" 
         frameborder="0" 
         allow="accelerometer; autoplay; encrypted-media; gyroscope; picture-in-picture" 
         allowfullscreen>
      </iframe>
    </div>
  </section>
  
  <section>
    <div>
      <iframe 
         width="460" 
         height="315" 
         src="https://www.youtube.com/embed/bJu3BtVl3Hc" 
         frameborder="0" 
         allow="accelerometer; autoplay; encrypted-media; gyroscope; picture-in-picture" 
         allowfullscreen>
     </iframe>
    </div>
  </section>
  
  <section>
    <div>
      <iframe 
         width="460" 
         height="315" 
         src="https://www.youtube.com/embed/dAz8Wu9sgDk" 
         frameborder="0" 
         allow="accelerometer; autoplay; encrypted-media; gyroscope; picture-in-picture" 
         allowfullscreen>
      </iframe>
    </div>
  </section>
  
  <section>
    <div>
      <iframe 
         width="460" 
         height="315" 
         src="https://www.youtube.com/embed/TrlqZfnHMho" 
         frameborder="0" 
         allow="accelerometer; autoplay; encrypted-media; gyroscope; picture-in-picture" 
         allowfullscreen>
      </iframe>
    </div>
  </section>
  
    <section>
    <div>
      <iframe 
         width="460" 
         height="315" 
         src="https://www.youtube.com/embed/hBi9wavp2w4" 
         frameborder="0" 
         allow="accelerometer; autoplay; encrypted-media; gyroscope; picture-in-picture" 
         allowfullscreen>
      </iframe>
    </div>
  </section>
  
    <section>
    <div>
      <iframe 
         width="460" 
         height="315" 
         src="https://www.youtube.com/embed/rwCJvSKzQkc" 
         frameborder="0" 
         allow="accelerometer; autoplay; encrypted-media; gyroscope; picture-in-picture" 
         allowfullscreen>
     </iframe>
    </div>
  </section>
</main>

/*
Color Palette used: 

#003049 ~> Prussian Blue 
#D62828 ~> Maximum Red 
#F77F00 ~> Orange
#EAE2B7 ~> Lemon Meringue

*/

* {
  box-sizing: border-box;
  padding: 0;
  margin: 0;
  line-height: 1.5;
}

#wrapper{
  background-color: #003049;
  overflow: hidden;
  text-align: center;
  border: solid black 4px;
  border-radius: 0 0 10px 10px;
}

#logo{
  background-color: black;
  border-radius: 0 0 10px 10px;
  color: #D62828;
  padding: 10px;
}

#flex-container{
  display: flex;
  flex-wrap: wrap;
  width: 100%;
  padding: 10px;
  align-items: center;
  justify-content: center;
/*   comment padding out to see what happens to the elements */
}

.flex-item{
  flex: 1 1 25%;
  list-style-type: none;
  padding: 10px;
}

a {
  color: #D62828;
  text-shadow: 1px 1px 1px black;
  font-weight: bold;
}

a:hover{
  color: #FCBF49;
  transition-duration: 0.4s
}

body{
  background-color: #EAE2B7;
}

#main-flex{
  display: flex;
  flex-wrap: wrap;
}

#main-flex section{
  flex: 1 1 33%;
  margin: 2px;
}

section div{
  overflow: hidden;
  padding-bottom: 56.25%;
  position: relative;
  border: solid black 2px;
  border-radius: 10px;
}
    
section div iframe{
  left: 0;
  top: 0;
  height: 100%;
  width: 100%;
  position: absolute;
}