/* ═══════════════════════════════════════════════════════════════════════════
   NAVIGATION — TopNavBar responsive
   ═══════════════════════════════════════════════════════════════════════════ */

.nav {
    position: sticky;
    top: 0;
    z-index: var(--z-nav);
    background-color: rgba(248, 249, 255, 0.92);
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
    border-bottom: 1px solid rgba(194, 198, 210, 0.3);
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.05);
    transition: padding var(--transition-md), box-shadow var(--transition-md);
}

.nav.scrolled {
    box-shadow: var(--shadow-soft);
}

.nav__inner {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding-block: 18px;
    gap: var(--space-6);
}

/* Logo / Brand */
.nav__brand {
    font-family: var(--font-headline);
    font-size: var(--text-headline-md);
    font-weight: var(--fw-extrabold);
    color: var(--color-primary);
    letter-spacing: var(--ls-snug);
    text-decoration: none;
    flex-shrink: 0;
    transition: opacity var(--transition-fast);
}

.nav__brand:hover { opacity: 0.85; }

/* Liens navigation desktop */
.nav__links {
    display: none;
    align-items: center;
    gap: var(--space-8);
    flex: 1;
    justify-content: center;
}

@media (min-width: 768px) {
    .nav__links { display: flex; }
}

.nav__link {
    font-size: var(--text-label-md);
    font-weight: var(--fw-semibold);
    color: var(--color-on-surface-variant);
    text-decoration: none;
    padding-bottom: 4px;
    position: relative;
    transition: color var(--transition-fast);
    letter-spacing: var(--ls-wide);
}

.nav__link::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    width: 0;
    height: 2px;
    background-color: var(--color-primary);
    transition: width var(--transition-md);
}

.nav__link:hover,
.nav__link.active {
    color: var(--color-primary);
}

.nav__link:hover::after,
.nav__link.active::after {
    width: 100%;
}

/* Actions (boutons) */
.nav__actions {
    display: flex;
    align-items: center;
    gap: var(--space-3);
    flex-shrink: 0;
}

/* Hamburger mobile */
.nav__hamburger {
    display: flex;
    flex-direction: column;
    gap: 5px;
    width: 28px;
    cursor: pointer;
    background: none;
    border: none;
    padding: 4px;
    border-radius: var(--radius-sm);
    transition: background-color var(--transition-fast);
}

.nav__hamburger:hover {
    background-color: var(--color-surface-low);
}

@media (min-width: 768px) {
    .nav__hamburger { display: none; }
}

.nav__hamburger span {
    display: block;
    height: 2px;
    background-color: var(--color-primary);
    border-radius: 2px;
    transition: transform var(--transition-md), opacity var(--transition-fast);
    transform-origin: center;
}

/* Hamburger → X */
.nav__hamburger.open span:nth-child(1) { transform: translateY(7px) rotate(45deg); }
.nav__hamburger.open span:nth-child(2) { opacity: 0; transform: scaleX(0); }
.nav__hamburger.open span:nth-child(3) { transform: translateY(-7px) rotate(-45deg); }

/* Menu mobile drawer */
.nav__mobile-menu {
    display: none;
    flex-direction: column;
    gap: 0;
    border-top: 1px solid rgba(194, 198, 210, 0.3);
    background-color: rgba(248, 249, 255, 0.98);
    padding: var(--space-4) 0;
    overflow: hidden;
    max-height: 0;
    transition: max-height var(--transition-slow) ease;
}

.nav__mobile-menu.open {
    display: flex;
    max-height: 500px;
}

.nav__mobile-link {
    padding: 14px var(--margin-mobile);
    font-size: var(--text-body-md);
    font-weight: var(--fw-medium);
    color: var(--color-on-surface);
    text-decoration: none;
    transition: background-color var(--transition-fast), color var(--transition-fast);
    border-radius: var(--radius-sm);
    margin-inline: var(--space-3);
}

.nav__mobile-link:hover,
.nav__mobile-link.active {
    background-color: var(--color-surface-low);
    color: var(--color-primary);
}

.nav__mobile-sep {
    height: 1px;
    background-color: var(--color-outline-variant);
    opacity: 0.3;
    margin: var(--space-2) var(--space-5);
}

.nav__mobile-cta {
    margin: var(--space-4) var(--space-5) var(--space-2);
}

/* ─── Sélecteur de langue ───────────────────────────────────────────────── */
.nav__lang-switch {
    display: inline-flex;
    align-items: center;
    gap: 4px;
    padding: 6px 12px;
    border-radius: var(--radius-full);
    border: 1.5px solid var(--color-primary);
    font-size: var(--text-label-sm);
    font-weight: var(--fw-semibold);
    color: var(--color-primary);
    text-decoration: none;
    letter-spacing: var(--ls-wide);
    transition: background-color var(--transition-fast), color var(--transition-fast);
    flex-shrink: 0;
}

.nav__lang-switch:hover {
    background-color: var(--color-primary);
    color: var(--color-on-primary);
}

@media (max-width: 767px) {
    .nav__lang-switch { display: none; }
}

.nav__mobile-lang {
    color: var(--color-primary);
    font-weight: var(--fw-medium);
}

/* ═══════════════════════════════════════════════════════════════════════════
   FOOTER
   ═══════════════════════════════════════════════════════════════════════════ */
.footer {
    background-color: var(--color-surface-highest);
    padding-top: var(--space-20);
}

.footer__grid {
    display: grid;
    grid-template-columns: 1fr;
    gap: var(--space-10);
    padding-bottom: var(--space-12);
}

@media (min-width: 640px) {
    .footer__grid { grid-template-columns: repeat(2, 1fr); }
}

@media (min-width: 1024px) {
    .footer__grid { grid-template-columns: 2fr 1fr 1fr 1fr; }
}

.footer__brand {
    font-family: var(--font-headline);
    font-size: var(--text-headline-md);
    font-weight: var(--fw-extrabold);
    color: var(--color-primary);
    margin-bottom: var(--space-4);
    display: block;
    text-decoration: none;
}

.footer__brand-desc {
    font-size: var(--text-body-sm);
    color: var(--color-on-surface-variant);
    line-height: var(--lh-body-md);
    margin-bottom: var(--space-6);
    max-width: 280px;
}

.footer__social {
    display: flex;
    gap: var(--space-3);
}

.footer__social-link {
    width: 40px;
    height: 40px;
    border-radius: var(--radius-full);
    background-color: var(--color-surface-card);
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--color-primary);
    text-decoration: none;
    transition: background-color var(--transition-fast), transform var(--transition-fast);
    box-shadow: var(--shadow-soft);
}

.footer__social-link:hover {
    background-color: var(--color-primary);
    color: var(--color-on-primary);
    transform: translateY(-2px);
}

.footer__col-title {
    font-family: var(--font-headline);
    font-size: var(--text-headline-sm);
    font-weight: var(--fw-semibold);
    color: var(--color-text-heading);
    margin-bottom: var(--space-5);
}

.footer__nav-list {
    display: flex;
    flex-direction: column;
    gap: var(--space-3);
}

.footer__nav-link {
    font-size: var(--text-body-sm);
    color: var(--color-on-surface-variant);
    text-decoration: none;
    transition: color var(--transition-fast);
}

.footer__nav-link:hover {
    color: var(--color-primary);
}

.footer__contact-item {
    display: flex;
    align-items: center;
    gap: var(--space-3);
    font-size: var(--text-body-sm);
    color: var(--color-on-surface-variant);
    margin-bottom: var(--space-3);
    text-decoration: none;
}

.footer__contact-item .material-symbols-outlined {
    color: var(--color-primary);
    font-size: 20px;
    flex-shrink: 0;
}

.footer__contact-item:hover { color: var(--color-primary); }

/* Bas de footer */
.footer__bottom {
    border-top: 1px solid rgba(194, 198, 210, 0.3);
    padding-block: var(--space-6);
}

.footer__bottom-inner {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: var(--space-3);
    text-align: center;
}

@media (min-width: 768px) {
    .footer__bottom-inner {
        flex-direction: row;
        justify-content: space-between;
        text-align: left;
    }
}

.footer__copyright {
    font-size: var(--text-body-sm);
    color: var(--color-on-surface-variant);
}

.footer__legal-links {
    display: flex;
    gap: var(--space-6);
}

.footer__legal-link {
    font-size: var(--text-label-sm);
    color: var(--color-on-surface-variant);
    text-decoration: none;
    transition: color var(--transition-fast);
}

.footer__legal-link:hover {
    color: var(--color-primary);
    text-decoration: underline;
}