/* --- EN-TÊTE (Foncé et distinct) --- */
header {
    position: fixed;
    width: 100%;
    top: 0;
    z-index: 100;
    background-color: var(--header-footer-bg);
    color: var(--text-light);
    border-bottom: 3px solid var(--accent-color); /* Ligne cuivrée */
    box-shadow: 0 2px 10px rgba(0,0,0,0.2);
}

nav {
    display: flex;
    justify-content: space-between;
    align-items: center;
    max-width: 1200px;
    margin: 0 auto;
    padding: 1rem 2rem;
}

.menu-toggle {
    display: none;
    cursor: pointer;
    background: none;
    border: 0;
    padding: 0.5rem;
}

.menu-toggle .bar {
    display: block;
    width: 25px;
    height: 3px;
    margin: 5px auto;
    background-color: var(--text-light);
    transition: transform 0.3s ease, opacity 0.3s ease;
}

nav h1 {
    font-size: 1.8rem;
    font-weight: 700;
    color: var(--text-light);
}

nav ul {
    display: flex;
    list-style: none;
    gap: 2rem;
}

nav a {
    color: var(--text-light);
    text-decoration: none;
    font-size: 1rem;
    font-weight: 600;
    transition: color 0.2s ease;
}

nav a:hover {
    color: var(--accent-color);
}

.lang-switcher {
    margin-left: 1rem;
}

.lang-switcher select {
    background: var(--card-bg);
    color: var(--header-footer-bg);
    border: 1px solid var(--border-color);
    border-radius: 4px;
    padding: 0.45rem 0.75rem;
    font-weight: 700;
    cursor: pointer;
}

.sr-only {
    position: absolute;
    width: 1px;
    height: 1px;
    padding: 0;
    margin: -1px;
    overflow: hidden;
    clip: rect(0, 0, 0, 0);
    white-space: nowrap;
    border: 0;
}

/* --- PIED DE PAGE (Foncé et distinct) --- */
footer {
    background-color: var(--header-footer-bg);
    color: var(--text-light);
    text-align: center;
    padding: 2.5rem;
    border-top: 3px solid var(--accent-color);
}