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HTML

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Adding Classes

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Insecure Resource

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CSS

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CSS preprocessors help make authoring CSS easier. All of them offer things like variables and mixins to provide convenient abstractions.

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CSS Base

About CSS Base

It's a common practice to apply CSS to a page that styles elements such that they are consistent across all browsers. We offer two of the most popular choices: normalize.css and a reset. Or, choose Neither and nothing will be applied.

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About Vendor Prefixing

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JavaScript

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JavaScript preprocessors can help make authoring JavaScript easier and more convenient.

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Babel includes JSX processing.

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HTML 

              
                <nav>
      <a href="/">
        <svg width="65px" height="45px" viewBox="0 0 13 9" version="1.1" xmlns="http://www.w3.org/2000/svg" xmlns:xlink="http://www.w3.org/1999/xlink">
        <g id="Page-1" stroke="none" stroke-width="1" fill="none" fill-rule="evenodd">
            <path d="M0.67578125,8.97265704 L0.67578125,2.22266348 C0.67578125,2.22266348 1.51953045,0.957039684 3.73827833,0.957039684 C5.9726512,0.957039684 6.67577553,2.16016354 6.67577553,2.16016354 C6.67577553,2.16016354 7.37889986,0.957039684 9.61327273,0.957039684 C11.8320206,0.957039684 12.6757698,2.22266348 12.6757698,2.22266348 L12.6757698,8.97265704 C12.6757698,8.97265704 11.1913962,7.87890808 9.58202276,7.87890808 C7.98827428,7.87890808 6.67577553,9.05078197 6.67577553,9.05078197 C6.67577553,9.05078197 5.36327678,7.87890808 3.7695283,7.87890808 C2.16015483,7.87890808 0.67578125,8.97265704 0.67578125,8.97265704 Z M1.69140528,2.48828822 L1.69140528,7.39453354 C1.69140528,7.39453354 2.33202967,6.91015901 3.86327821,6.91015901 C5.37890176,6.91015901 6.175776,7.81640814 6.175776,7.81640814 L6.175776,2.70703802 C6.175776,2.70703802 5.09765203,1.92578876 3.73827833,1.92578876 C2.39452961,1.92578876 1.69140528,2.48828822 1.69140528,2.48828822 Z M7.17577505,2.70703802 L7.17577505,7.81640814 C7.17577505,7.81640814 7.92577434,6.91015901 9.48827285,6.91015901 C11.0351464,6.91015901 11.6601458,7.39453354 11.6601458,7.39453354 L11.6601458,2.48828822 C11.6601458,2.48828822 10.9570214,1.92578876 9.61327273,1.92578876 C8.25389902,1.92578876 7.17577505,2.70703802 7.17577505,2.70703802 Z" id="book" fill="#B71C1C"></path>
        </g>
    </svg>
      <i>B</i><i>o</i><i>o</i><i>o</i><i>o</i><i>o</i><i>o</i><i>k</i><i>s</i>
       <span>_</span></a>      
      <a href="pinocchio.html">Pinocchio <span>Winscluss</span></a>
      <a href="internet.html">Internet. Au-delà du virtuel <span>Jean&#8209;Noël&nbsp;Lafargue, Mathieu&nbsp;Burniat</span></a>
      <a href="jean-doux.html">Jean Doux et le mystère de&nbsp;la&nbsp;disquette&nbsp;molle <span>Philippe&nbsp;Valette</span></a>
      <a href="carnet.html">Carnet de santé foireuse <span>Pozla</span></a>
      <a href="moins.html">Moins qu’hier <span>Fabcaro</span></a>
      <a href="de-rien.html">De rien <span>Geoffroy Monde</span></a>
      <a href="blaise.html">Blaise <span>Dimitri Planchon</span></a>
      <a href="quartier.html">Quartier lointain <span>Jirō Taniguchi</span></a>
      <a href="pyongyang.html">Pyongyang <span>Guy Delisle</span></a>
 </nav>
!

CSS 

              
                @import url('https://fonts.googleapis.com/css?family=Muli:400,700');

body{
  background:#fff;
  margin:0;
  font-family:Georgia, 'Times New Roman', Times, serif;
  line-height: 1.5;
}

nav a{
  display:block;
  font-family: 'Muli', sans-serif;
  font-size:calc(20px + (100vw - 320px) / 48);
  text-decoration: none;
  color:#333;
  padding:8px;
  margin:0;
  font-weight: 400;
  background: #fff;
  transition: background-color .4s, font-size .4s;
}

nav a:hover{
  background:#f6f6f6;
}


nav a span{
  font-size:calc(16px + (100vw - 320px) / 256);
  font-family:Georgia, 'Times New Roman', Times, serif;
  opacity: 0.8;

}

nav>a>svg{
  height:auto;
  width:1em;
  display: inline-block;
}

i{
  font-style: normal;
}

i:nth-child(1) {color: #B71C1C;}
i:nth-child(2) {color: #880E4F;}
i:nth-child(3) {color: #4A148C;}
i:nth-child(4) {color: #311B92;}
i:nth-child(5) {color: #1A237E;}
i:nth-child(6) {color: #0D47A1;}
i:nth-child(7) {color: #01579B;}
i:nth-child(8) {color: #006064;}
i:nth-child(9) {color: #004D40;}
i:nth-child(10){color: #1B5E20;}

nav:first-child>a:nth-child(1) {color: #B71C1C;}
nav:first-child>a:nth-child(2) {color: #880E4F;}
nav:first-child>a:nth-child(3) {color: #4A148C;}
nav:first-child>a:nth-child(4) {color: #311B92;}
nav:first-child>a:nth-child(5) {color: #1A237E;}
nav:first-child>a:nth-child(6) {color: #0D47A1;}
nav:first-child>a:nth-child(7) {color: #01579B;}
nav:first-child>a:nth-child(8) {color: #006064;}
nav:first-child>a:nth-child(9) {color: #004D40;}
nav:first-child>a:nth-child(10){color: #1B5E20;}
!

JS
!
999px

Console