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:496px; width : 295px;}

h3{ font-family: Optima, "Trebuchet MS", serif;text-decoration: none; color:black;margin-left:295px;letter-spacing: 3px;font-size: 11px;margin-bottom: 50px;text-align: center;width :700px;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;margin-top:60px;margin-bottom:25px;font-weight: bold; margin-left:586px;width : 95px;  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:-280px;}
 
 .suivant1{font-family: Optima, "Trebuchet MS", serif;font-size: 26px;width:20px;margin-left:1048px ;margin-top:-50px;}
  
 .precedant2{font-family: Optima, "Trebuchet MS", serif;font-size: 26px;width:20px;margin-left:390px ;margin-top:-320px;}
 
 .suivant2{font-family: Optima, "Trebuchet MS", serif;font-size: 26px;width:20px;margin-left:880px ;margin-top:-57px;}