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                <h1>Un titre de niveau 1</h1>

<div class="conteneur" id="cp">
  <p>Un premier paragraphe</p>
  <p>Un autre paragraphe</p>

    <li>Un élément de liste</li>
    <li>Un <span class="gras">autre élément</span> de liste</li>

<p>Un <span class="gras fondjaune">troisième</span> paragraphe</p>

  <p class="gras">Un dernier paragraphe</p>


                /*Couleur de fond du body (donc de la partie visible de la page) : bleu clair*/
    background-color: lightBlue;

    background-color: purple; /*Les div auront un fond violet*/
    color: white; /*Textes des éléments dans les div blancs par héritage*/
  width: 80%; /*La largeur de l'élément sera égale à 80% de son parent*/
  margin: 0 auto; /*Permet de centrer le div dans son élément parent (body ici)*/

    font-weight: bold; /*Les textes seront en gras*/
    background-color: yellow; /*Fond des span jaune*/