body {
    font-family: Arial, sans-serif;
    margin: 0;
    padding: 0;
    background-color: #f4f4f4;
    height: 100vh;
    display : flex;
    justify-content : center;
}

#btnacc {
    margin-top: 20px;
    padding: 10px 20px;
    background-color: #333;
    color: white;
    border: none;
    cursor: pointer;
    font-size: 16px;
}

#bouton-submit {
    margin-top: 20px;
    padding: 10px 20px;
    background-color: #333;
    color: white;
    border: none;
    cursor: pointer;
    font-size: 16px;
}