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

body {
    font-family: Arial, sans-serif;
    line-height: 1.6;
    margin: 0;
    padding: 0;
}

header {
    background-color: #ff6600;
    color: #fff;
    padding: 1em;
    text-align: center;
}

header h1 {
    margin-bottom: 0.5em;
}

header p {
    font-size: 1.1em;
}

nav ul {
    list-style-type: none;
    padding: 0;
}

nav ul li {
    display: inline;
    margin-right: 10px;
}

nav ul li a {
    color: #fff;
    text-decoration: none;
    font-weight: bold;
}

section {
    padding: 2em;
    text-align: center;
}

section h2 {
    color: #d94711;
    margin-bottom: 1em;
}

.image-longue {
    width: 100%;
    height: auto;
    margin-top: 20px;
    border: 2px solid #ff6600;
}

footer {
    background-color: #d94711;
    color: #fff;
    text-align: center;
    padding: 1em 0;
    position: fixed;
    bottom: 0;
    width: 100%;
}

@media (max-width: 768px) {
    nav ul li {
        display: block;
        margin: 10px 0;
    }

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