.boitadefinition {
   background-attachment: fixed;
   background-position: center;
   text-align: center;
}


/* Style for <a> in heared */
.btn {
   background-color: #400670;
   margin-top: 70px;
   padding: 6px 40px;
   color: white;
   display: inline-block;
   margin-bottom: 10px;
}

.btn-link {  
   list-style-type: none;
   border-right: 2px solid #400670;
   padding-right: 20px;
   padding-left: 20px;
   font-size: 20px; 
   background: none;
   text-decoration: none !important;
   width: 150px;
   border-bottom: 2px solid transparent;
}

/* take away last border from <a> in header */
.btn-link:last-child {
   border-right: none;
}

.petitsLiens {
   text-decoration: none;
   color: lightgreen;
   font-size: 18px;
   
}




.col { 
text-align: center;
background: rgb(223,79,142);
background: radial-gradient(circle, rgb(26, 26, 26) 0%, rgb(34, 63, 97) 100%);
margin: 20px auto;
border-radius: 5px;
border-bottom: 5px solid #400670;
padding: 10px;
margin: 10px 0;
  margin-right: 0px;
  margin-left: 0px;
color: #fff;
font-size: 20px;
}

.boiterunes {
   margin-left: 30px;
   margin-right: 30px;
    margin: 10px 0;
color: #fff;
font-size: 20px;
}