/* Style Général */
body {
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    line-height: 1.6;
    margin: 0;
    color: #333;
    background-color: #f4f4f9;
}

/* Navigation */
nav {
    background: #2c3e50;
    padding: 1rem;
    position: sticky;
    top: 0;
}

nav ul {
    list-style: none;
    display: flex;
    justify-content: center;
    margin: 0;
    padding: 0;
}

nav ul li {
    margin: 0 15px;
}

nav ul li a {
    color: white;
    text-decoration: none;
    font-weight: bold;
    transition: color 0.3s;
}

nav ul li a:hover {
    color: #3498db;
}

/* Contenu */
header, section, footer {
    max-width: 900px;
    margin: 20px auto;
    padding: 20px;
    background: white;
    border-radius: 8px;
    box-shadow: 0 2px 5px rgba(0,0,0,0.1);
}

h1, h2 {
    color: #2c3e50;
    border-bottom: 2px solid #3498db;
    padding-bottom: 10px;
}

footer {
    text-align: center;
    font-size: 0.9em;
    background: none;
    box-shadow: none;
}