.texte { font-size: 15px; 
 text-align: center;
padding :  5px;
margin-bottom :10px;
}

.cadre { font-size: 20px;
  font-weight:bold;
padding :  5px;
text-align: center;
border: 2px solid black;
border-radius :  30px;
margin-bottom :30px;
background-color: #778889;
}

.image_centree{
  width : 50%;
  height : 100%;
  text-align: center;
   margin-left: auto;
   margin-right: auto;
   } 

a:hover {
color: red;
}

a:visited {
color: brown;
}

a:focus {
color: red;
}