body {
    font-family: Arial, sans-serif;
    margin: 0;
    padding: 0;
    background-color: #f4f4f4;
    color: #333;
}

header {
    background-color: #0066cc; /* Bleu */
    color: #fff;
    padding: 20px 0;
    text-align: center;
}

nav ul {
    list-style-type: none;
    padding: 0;
    margin: 0;
    text-align: center;
}

nav ul li {
    display: inline-block;
    margin: 0 15px;
}

nav ul li a {
    color: #fff;
    text-decoration: none;
    font-weight: bold;
    padding: 10px 15px;
    border-radius: 15px;
    background-color: #00cc66; /* Vert */
}

nav ul li a:hover {
    background-color: #009944; /* Darker green */
}

main {
    padding: 20px;
}

.large-image {
    width: 100%;
    height: auto;
}

.content {
    padding: 20px;
    text-align: left;
}

footer {
    background-color: #333;
    color: #fff;
    text-align: center;
    padding: 10px 0;
    position: relative;
    width: 100%;
    bottom: 0;
}

/* Responsive Design */
@media (max-width: 768px) {
    nav ul {
        display: flex;
        flex-direction: column;
        align-items: center;
    }

    nav ul li {
        margin: 10px 0;
    }

    .content {
        padding: 10px;
    }
}

@media (max-width: 480px) {
    nav ul li {
        margin: 5px 0;
    }

    header, footer {
        padding: 10px 0;
    }
}