header {
    background-color: #CF4528;
    color: white;
    position: sticky;
    top: 0;
    z-index: 1000;
    box-shadow: 0 2px 10px rgba(0,0,0,0.2);
}

.navbar {
    display: flex;
    justify-content: space-between;
    align-items: center;
    max-width: 1000px;
    margin: 0 auto;
    padding: 15px 20px;
}

.navbar h1 {
    margin: 0;
    font-size: 1.5rem;
}

.nav-links a {
    color: white;
    text-decoration: none;
    margin-left: 20px;
    font-weight: bold;
    padding: 8px 12px;
    border-radius: 4px;
    transition: background-color 0.3s;
}

.nav-links a:hover {
    background-color: rgba(255, 255, 255, 0.2); /* Effet au survol */
}