.texte { font-size: 30px; 
  color:red;
 text-align: center;
padding :  5px;
margin-bottom :20px;
}

.cadre { font-size: 25px;
  font-weight:bold;
padding :  5px;
text-align: center;
border: 2px solid black;
border-radius :  10px;
margin-bottom :10px;
background-color: red;
}

.image_centree{
  width : 50%;
  height : 100%;
  border: 1px #23282d solid; 
  text-align: center;
   margin-left: auto;
   margin-right: auto;
   } 

a:hover {
color: purple;
}

a:visited {
color: white;
}

a:focus {
color: yellow;
  background: gray;
}