h1{font-family: Optima, "Trebuchet MS", serif; font-style: normal;font-weight: normal; margin-top:0px; letter-spacing: 3px;font-size: 20px;margin-bottom : 20px;text-align:center;margin-left:498px; width : 300px;}

h3{ font-family: Optima, "Trebuchet MS", serif;text-decoration: none; color:black;margin-left:250px;letter-spacing: 3px;font-size: 11px;margin-bottom: 50px;text-align: center;width : 800px;text-align:center;}


 a{ text-decoration: none; color:grey;}
 a:hover { color: black;}
 
 .retour { font-family: Optima, "Trebuchet MS", serif;text-align:center;font-size: 11px;letter-spacing: 1.5px;margin-bottom:25px;font-weight: bold;margin-left:596px;width : 100px; margin-top:30px;}

 img { margin-left:294px ;}
 
 .vertical { margin-left:443px ;}
 
 
 .precedant1{font-family: Optima, "Trebuchet MS", serif;font-size: 26px;width:20px;margin-left:238px ;margin-top:-300px;}
 
 .suivant1{font-family: Optima, "Trebuchet MS", serif;font-size: 26px;width:20px;margin-left:1048px ;margin-top:-53px;}
  
 
 .precedant2{font-family: Optima, "Trebuchet MS", serif;font-size: 26px;width:20px;margin-left:390px ;margin-top:-58px;}
 
 .precedant3{font-family: Optima, "Trebuchet MS", serif;font-size: 26px;width:20px;margin-left:238px ;margin-top:-299px;}

 
 .suivant2{font-family: Optima, "Trebuchet MS", serif;font-size: 26px;width:20px;margin-left:880px ;margin-top:-53px;}
 
 .suivant3{font-family: Optima, "Trebuchet MS", serif;font-size: 26px;width:20px;margin-left:1048px ;margin-top:-57px;}