body{
    height: 100vh;
    text-align: center;
}

.flex-center{
    height: 100%;
    display: flex;
    flex-direction: column;
    align-content: center;
    justify-content: center;
    align-items: center;
}

h2{
    font-size: 35px;
    margin: 20px 10px 10px 10px;
    color: #3b3b3b;
}

p{
    color: #3b3b3b;
}

h1{
    font-size: 50px;
}

form{
    margin-top: 20px;
}

.margin-top-20{
    margin-top: 20px;
}

.input-text{
    width: 300px;
    padding: 10px;
    font-size: 15px;
    border-radius: 10px;
    outline: none;
    border: 1px solid #999999;
}

.input-valid {
    width: 100px;
    padding: 10px;
    font-size: 15px;
    border-radius: 10px;
    outline: none;
    border: 1px solid #3b3b3b;
    background: #3b3b3b;
    color: white;
    cursor: pointer;
    transition: 300ms;
}

.input-valid:hover {
    border: 1px solid #00096E;
    background: #00096E;
    transition: 300ms;
}

p.retour-erreur {
    margin-top: 10px;
    color: #a10000;
}

p.retour-valid {
    margin-top: 10px;
    color: #006104;
}

@media (max-width: 428px) {
    .input-text{
        width: 200px;
    }
}