body {
    font-family: 'Raleway', sans-serif;
  
    background-image: url(img/Photo_maregraphe_sans_logo-min.png);
    background-size: contain;
    background-repeat: no-repeat;
  
    width: 100%;
    margin: auto;
  
    display: grid;
    grid-template-rows: 60px 1.7fr 1fr auto;
	
  }

  #bandeau {
    position: fixed;
    z-index: 100;
    top:0%;
    padding: -10px;
    
    width: 100%;
    height: 60px;

    background-color: white;
    box-shadow: 0px 1px 10px gray;
  }


  #bandeau #titre {
    display: inline;
    float: left;

    padding-top: 15px;
    padding-left: 10px;

    width: 700px;
    height: 100%;

    font-size: 1.7em;
  }

  #bandeau #logos {
    display: inline;
    float: right;

    padding-top: 3px;
    padding-bottom: 3px;

    max-width: auto;
    height: 54px;
  }

  #boutton a {
    position: relative;
    z-index: 10;

    top: 40%;
    left: 10%;

    padding: 1%;
	  
    background: rgb(128, 204, 41);
    box-shadow: 0px 0px 3px gray;
    
    text-align: center;
    
    text-decoration: none;
    color: white;
    font-size: 1.5em;
    font-weight: bold;
  }

  #text_explicatif {
    padding-top: 50px;
    padding-left: 80px;
    padding-right: 80px;
    padding-bottom: 50px;
    grid-row: 3;

    background-color: whitesmoke;
  }

  footer {
    padding-top: 20px;
    padding-bottom: 20px;
    grid-row: 4;

    background: rgb(128, 204, 41);

    color: white;
    text-align: center;
    font-size: 0.8em;
    line-height: 1.6em;
  }

 #photo {
    position: absolute;
    margin: auto;
	  
  }

img {
	max-width: 100%;
	height: auto;
}