#lop,#err{
    position: fixed;
    display: flex;
    justify-content: center;
    align-items: center;
    height: 90vh;
    width: 100%;
 
  
    z-index: 1000;
}

#kol{
    width: 40%;
    height: 20%;
    background-color: white;
    text-align: center;
    padding: 3vh;
}

.byu{
    background-image: url('../images/fondé.jpg');
    background-size: cover;
    height: 100%;
    width: 100%;
}
/* .ly{
    position: fixed;
    display: flex;
    justify-content: center;
    align-items: center;
    height: 100%;
    width: 100%;
    background-color: rgba(0,0,0,0.4);
    background-color:  rgba(0,0,0,0.6);
    z-index: 1000;
} */