body {
    font-family: Didot, Helvetica, sans-serif;
    font-size: 1.2em;
    background-color: rgb(0, 0, 0);
    color: rgb(255, 255, 255);
  }

article { margin: 0 10%; color:#a0a0a0; }
section { margin: 0 20%; color:#a0a0a0; }

  * { box-sizing: border-box; }

  img { max-width: 60%; height: auto; }

  .iframe__container{ width: 100%; position: relative; }

  .iframe__container::after{
    content:"";
    display: block;
    width: 100%;
    padding-bottom: calc(1080/1920*100%);
  }

  iframe{
    position: absolute;
    width: 100%;
    height: 100%;
    top:0px;
    left: 0px;
  }

  .center-div { margin: 0 auto; width: 60%; }


  .main {
    float: left;
    width: 50%;
    padding: 0 10px;
    overflow: hidden;
  }
  
  .right {
    float: left;
    width: 50%;
    padding: 0 10px;
    margin-top: 0;
  }
  

   /* For tablets: */
  /* @media only screen and (max-width:800px) {
   
    .main {
      width: 50%;
      padding: 0;
    }
    .right {
      width: 50%;
    }
  } */

  @media only screen and (max-width:900px) {
    /* tablettes */
       img {
        max-width: 70%;
        height: auto;
      }
      .center-div { margin: 0 auto; width: 100%; }  
      section { margin: 0 5px; color:#a0a0a0; }
    
  }

  
  @media only screen and (max-width:600px) {
    /* For mobile phones: */
      .main, .right {
      width: 100%;
      padding: 0 10px;
      }
      body {
        font-family:  Helvetica, sans-serif;
        font-size: 1.2em;
        background-color: rgb(255, 255, 255);
        color: rgb(0, 0, 0);
      }
      article { margin: 0 5px O 4px; color:#000000; }
      img { max-width: 90%; height: auto; }
      .center-div { margin: 0 auto; width: 100%; }  
      section { margin: 0 5px; color:#000000; }
  }


  
  .mobile-container {
    max-width: 480px;
    margin: auto;
    background-color: #EEE;
    height: 800px; 
    color: black;
    border-radius: 10px;
  }
  
  .topnav {
    overflow: hidden;
    background-color: #990033;
    position: relative;
  }
  
  .topnav #myLinks {
    display: none;
  }
  
  .topnav a {
    color: white;
    padding: 14px 16px;
    text-decoration: none;
    font-size:1.2em;
    display: block;
  }
  
  .topnav a.icon {
    background: black;
    display: block;
    position: absolute;
    left: 0;
    top: 0;
  }
  
  .topnav a:hover {
    background-color: #505;
    color: black;
  }
  
  .active {
    background-color: #990033;
    color: white;
  }

  .responsive {
    width: 100%;
    max-width: 480px;
    height: auto; 
}

.centre {text-align: center;}
.rouge {color : #ae003a;}
.gris {color : #a0a0a0;}
.blanc {color : #ffffff;}
.noir {color : #000000;}
.gras {font-weight: bold;}
.gros {font-size: 1.2em;}
.soustexte { margin: 0 20%; color:#a0a0a0; }