form {
    width: 300px;
    margin: 0 auto;
}
label {
    display: block;
    margin-bottom: 5px;
}
input {
    width: 100%;
    padding: 10px;
    margin-bottom: 15px;
    border: 1px solid #ccc;
    border-radius:   4px;
}
#etat {
    width: 10%;   
}
#souv {
    width: 10%;   
}
button {
    background-color: #4CAF50;
    color: white;
    padding: 10px 20px;
    border: none;
    border-radius: 4px;
    cursor: pointer; 
}