.bt {
  background: #223e7d;
  color: white;
  padding: 5px 15px;
  font-size: 1rem;
  text-transform: uppercase;
  display: inline-block;
  border: 2px solid #223e7d;
  letter-spacing: 1px;
  -webkit-transition: all 0.4s ease;
  -moz-transition: all 0.4s ease;
  -o-transition: all 0.4s ease;
  -ms-transition: all 0.4s ease;
  transition: all 0.4s ease;
}
.bt:hover {
    background-color: rgba(68, 96, 159, 1);
    color: white;
}.listIllu {
  margin-bottom: 25px;
  display: inline-block;
  width: 100%;
}   
.listIllu img {
  float: left;
  width: 15%; 
  max-width: 100px;
  margin-right: 4%;
}  
.listIllu .infos {
  float: left;
  width: 80%; 
}