/* === Style général du body === */
body {
    font-family: 'Poppins', sans-serif;
    background: linear-gradient(135deg, #667eea, #764ba2);
    display: flex;
    justify-content: center;
    align-items: center;
    min-height: 100vh;
    margin: 0;
    padding: 20px;
    box-sizing: border-box;
}

/* === Conteneur principal === */
.form-container {
    width: 100%;
    max-width: 450px;
    padding: 30px;
    background: white;
    border-radius: 12px;
    box-shadow: 0px 4px 20px rgba(0, 0, 0, 0.2);
    text-align: center;
    animation: fadeIn 0.5s ease-in-out;
}

/* === Effet d'apparition === */
@keyframes fadeIn {
    from {
        opacity: 0;
        transform: translateY(-20px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

/* === Titre === */
.form-container h1 {
    font-size: 24px;
    color: #333;
    margin-bottom: 20px;
    font-weight: 600;
}

/* === Style des labels === */
.form-container label {
    display: block;
    text-align: left;
    font-weight: 500;
    margin: 10px 0 5px;
    color: #555;
}

/* === Champs de formulaire === */
.form-container input {
    width: 100%;
    padding: 12px;
    border: 1px solid #ddd;
    border-radius: 8px;
    font-size: 16px;
    transition: 0.3s ease;
}

/* === Effet focus sur les champs === */
.form-container input:focus {
    border-color: #667eea;
    box-shadow: 0 0 8px rgba(102, 126, 234, 0.3);
    outline: none;
}

/* === Case à cocher === */
.form-container input[type="checkbox"] {
    width: auto;
    margin-right: 5px;
}

/* === Bouton d'inscription === */
.form-container button {
    width: 100%;
    padding: 12px;
    background: linear-gradient(135deg, #667eea, #764ba2);
    color: white;
    border: none;
    border-radius: 8px;
    cursor: pointer;
    font-size: 18px;
    margin-top: 15px;
    transition: 0.3s ease;
}

/* === Effet hover bouton === */
.form-container button:hover {
    background: linear-gradient(135deg, #556cd6, #5a3d91);
}

/* === Lien vers connexion === */
.form-container p {
    text-align: center;
    margin-top: 15px;
    font-size: 14px;
}

.form-container p a {
    color: #667eea;
    text-decoration: none;
    font-weight: 500;
}

.form-container p a:hover {
    text-decoration: underline;
}

/* === Messages d'erreur === */
.alert {
    padding: 10px;
    border-radius: 8px;
    margin-bottom: 15px;
    font-size: 14px;
}

.alert-danger {
    background: #ffdddd;
    color: #d9534f;
    border-left: 4px solid #d9534f;
}

/* === RESPONSIVE DESIGN === */

/* Petits écrans (mobiles) */
@media screen and (max-width: 480px) {
    .form-container {
        padding: 20px;
        border-radius: 8px;
    }

    .form-container h1 {
        font-size: 22px;
    }

    .form-container input {
        font-size: 14px;
        padding: 10px;
    }

    .form-container button {
        font-size: 16px;
        padding: 10px;
    }
}

/* Tablettes (entre 481px et 768px) */
@media screen and (max-width: 768px) {
    body {
        padding: 30px;
    }

    .form-container {
        max-width: 350px;
    }

    .form-container h1 {
        font-size: 24px;
    }
}