/* Réinitialisation */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

/* Base */
body {
    font-family: Arial, sans-serif;
    line-height: 1.6;
    color: #333;
    background-color: #f9f9f9;
    max-width: 1000px;
    margin: 0 auto;
    padding: 1rem;
}

/* En-tête */
header {
    background: #4CAF50;
    color: white;
    padding: 1.5rem 1rem;
    text-align: center;
}

header h1 {
    font-size: 1.8rem;
    margin-bottom: 0.5rem;
}

header p {
    font-size: 1rem;
}

/* Navigation */
nav ul {
    list-style: none;
    padding: 1rem;
    background: #333;
    text-align: center;
    display: flex;
    flex-wrap: wrap;
    justify-content: center;
    gap: 0.5rem;
}

nav ul li {
    display: inline;
}

nav ul li a {
    color: white;
    text-decoration: none;
    padding: 0.5rem 1rem;
    border-radius: 5px;
    display: inline-block;
}

nav ul li a:hover {
    background: #555;
}

/* Contenu principal */
main {
    padding: 2rem 1rem;
}

main section {
    margin-bottom: 2.5rem;
    padding: 1rem 1.5rem;
    background: #fff;
    border-radius: 8px;
    box-shadow: 0 2px 5px rgba(0, 0, 0, 0.05);
}

/* Titres */
main h2 {
    color: #4CAF50;
    font-size: 1.5rem;
    margin-bottom: 1rem;
}

/* Formulaire */
form {
    background: #fff;
    padding: 1.5rem;
    border-radius: 5px;
    box-shadow: 0 2px 5px rgba(0, 0, 0, 0.1);
    max-width: 600px;
    margin: 0 auto;
}

form label {
    display: block;
    margin-bottom: 0.5rem;
    font-weight: bold;
}

form input[type="text"],
form input[type="email"],
form textarea {
    width: 100%;
    padding: 0.75rem;
    margin-bottom: 1rem;
    border: 1px solid #ccc;
    border-radius: 4px;
    font-size: 1rem;
    background-color: #fdfdfd;
}

form textarea {
    resize: vertical;
    min-height: 120px;
}

form button {
    background-color: #4CAF50;
    color: white;
    border: none;
    padding: 0.75rem 1.5rem;
    font-size: 1rem;
    border-radius: 4px;
    cursor: pointer;
    transition: background-color 0.3s ease;
    width: 100%;
}

form button:hover {
    background-color: #45a049;
}

/* Messages d'information */
.alert {
    max-width: 800px;
    margin: 1rem auto;
    padding: 1rem;
    border-radius: 5px;
    font-weight: bold;
}

.success {
    background-color: #d4edda;
    color: #155724;
    border: 1px solid #c3e6cb;
}

.error {
    background-color: #f8d7da;
    color: #721c24;
    border: 1px solid #f5c6cb;
}

/* Pied de page */
footer {
    background: #333;
    color: white;
    text-align: center;
    padding: 1rem 0;
    margin-top: 2rem;
    font-size: 0.95rem;
}

/* Responsive */
@media (max-width: 768px) {
    body {
        padding: 0.5rem;
    }

    nav ul {
        flex-direction: column;
        gap: 0.25rem;
    }

    header h1 {
        font-size: 1.5rem;
    }

    header p {
        font-size: 0.95rem;
    }

    main h2 {
        font-size: 1.3rem;
    }

    form button {
        font-size: 1rem;
        padding: 0.75rem;
    }
}

@media (max-width: 480px) {
    form {
        padding: 1rem;
    }

    nav ul li a {
        font-size: 0.95rem;
        padding: 0.5rem 0.75rem;
    }

    footer {
        font-size: 0.85rem;
    }
}