/* ============================================================
   HEADER.CSS — Les Sondeurs
   Navigation principale : fixe, responsive, mega menu
   ============================================================ */

/* ──────────────────────────────────────────
   HEADER — Base
────────────────────────────────────────── */
.header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: var(--z-sticky);
  background-color: var(--color-surface);
  border-bottom: 1px solid var(--color-border);
  transition: box-shadow 0.3s ease, border-color 0.3s ease;
}

/* État scrollé */
.header--scrolled {
  box-shadow: var(--shadow-md);
  border-bottom-color: transparent;
}

.header__container {
  display: flex;
  align-items: center;
  height: var(--header-height);
  gap: var(--space-6);
  max-width: var(--container-max);
  margin: 0 auto;
  padding: 0 var(--space-6);
}

/* ──────────────────────────────────────────
   HEADER — Logo
────────────────────────────────────────── */
.header__logo {
  display: flex;
  align-items: center;
  flex-shrink: 0;
  text-decoration: none;
}

.header__logo-img {
  height: 40px;
  width: auto;
  object-fit: contain;
  display: block;
  transition: var(--transition-fast);
}

.header__logo:hover .header__logo-img {
  opacity: 0.85;
}

/* Fallback logo SVG si image absente */
.header__logo-text {
  font-family: var(--font-body);
  font-weight: var(--font-black);
  font-size: 1.25rem;
  color: var(--color-text-primary);
  letter-spacing: -0.01em;
  display: none;
}

.header__logo-text .logo-accent {
  color: var(--color-primary);
}

/* ──────────────────────────────────────────
   HEADER — Navigation principale
────────────────────────────────────────── */
.header__nav {
  flex: 1;
  display: flex;
  justify-content: center;
}

.header__nav-list {
  display: flex;
  align-items: center;
  list-style: none;
  gap: 0;
}

.header__nav-item {
  position: relative;
}

.header__nav-link {
  display: flex;
  align-items: center;
  gap: var(--space-1);
  padding: 0 var(--space-4);
  height: var(--header-height);
  font-family: var(--font-body);
  font-size: var(--text-sm);
  font-weight: var(--font-medium);
  color: var(--color-text-secondary);
  text-decoration: none;
  white-space: nowrap;
  transition: color 0.2s ease;
  position: relative;
}

/* Barre active sous le lien */
.header__nav-link::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: var(--space-4);
  right: var(--space-4);
  height: 2px;
  background: var(--color-primary);
  transform: scaleX(0);
  transform-origin: center;
  transition: transform 0.2s ease;
  border-radius: var(--radius-full);
}

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

.header__nav-link:hover::after {
  transform: scaleX(1);
}

/* Lien actif */
.header__nav-link--active {
  color: var(--color-primary) !important;
  font-weight: var(--font-semibold);
}

.header__nav-link--active::after {
  transform: scaleX(1) !important;
}

/* Flèche menu déroulant */
.header__nav-arrow {
  font-size: 10px;
  transition: transform 0.2s ease;
  display: inline-block;
  margin-left: 2px;
}

.header__nav-item--has-mega:hover .header__nav-arrow {
  transform: rotate(180deg);
}

/* ──────────────────────────────────────────
   MEGA MENU — Services
────────────────────────────────────────── */
.header__mega {
  position: absolute;
  top: calc(100% + 1px);
  left: 50%;
  transform: translateX(-50%);
  width: 720px;
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-top: 3px solid var(--color-primary);
  border-radius: 0 0 var(--radius-xl) var(--radius-xl);
  box-shadow: var(--shadow-xl);
  padding: var(--space-6);
  opacity: 0;
  visibility: hidden;
  transform: translateX(-50%) translateY(-8px);
  transition: opacity 0.2s ease, visibility 0.2s ease, transform 0.2s ease;
  z-index: var(--z-dropdown);
}

.header__nav-item--has-mega:hover .header__mega {
  opacity: 1;
  visibility: visible;
  transform: translateX(-50%) translateY(0);
}

.header__mega-title {
  font-size: var(--text-xs);
  font-weight: var(--font-bold);
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--color-text-muted);
  padding-bottom: var(--space-4);
  border-bottom: 1px solid var(--color-border);
  margin-bottom: var(--space-4);
}

.header__mega-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: var(--space-3);
}

.header__mega-item {
  display: flex;
  align-items: flex-start;
  gap: var(--space-3);
  padding: var(--space-4);
  border-radius: var(--radius-lg);
  text-decoration: none;
  transition: var(--transition-fast);
  color: var(--color-text-primary);
}

.header__mega-item:hover {
  background: var(--color-surface-alt);
}

.header__mega-icon {
  width: 40px;
  height: 40px;
  border-radius: var(--radius-md);
  background: var(--color-primary-light);
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
  font-size: 18px;
  color: var(--color-primary);
  transition: var(--transition-fast);
}

.header__mega-item:hover .header__mega-icon {
  background: var(--color-primary);
  color: white;
}

.header__mega-content {}

.header__mega-name {
  font-size: var(--text-sm);
  font-weight: var(--font-semibold);
  color: var(--color-text-primary);
  margin-bottom: var(--space-1);
  display: block;
}

.header__mega-desc {
  font-size: var(--text-xs);
  color: var(--color-text-muted);
  line-height: var(--leading-relaxed);
}

/* Footer du mega menu */
.header__mega-footer {
  margin-top: var(--space-4);
  padding-top: var(--space-4);
  border-top: 1px solid var(--color-border);
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.header__mega-footer-text {
  font-size: var(--text-xs);
  color: var(--color-text-muted);
}

/* ──────────────────────────────────────────
   HEADER — Actions (CTA)
────────────────────────────────────────── */
.header__actions {
  display: flex;
  align-items: center;
  gap: var(--space-3);
  flex-shrink: 0;
}

/* ──────────────────────────────────────────
   HEADER — Hamburger (Mobile)
────────────────────────────────────────── */
.header__hamburger {
  display: none;
  flex-direction: column;
  justify-content: center;
  align-items: center;
  width: 40px;
  height: 40px;
  border-radius: var(--radius-md);
  background: none;
  border: 1.5px solid var(--color-border);
  cursor: pointer;
  padding: 0;
  gap: 5px;
  transition: var(--transition-fast);
  flex-shrink: 0;
}

.header__hamburger:hover {
  border-color: var(--color-primary);
  background: var(--color-primary-light);
}

.header__hamburger-line {
  display: block;
  height: 1.5px;
  background: var(--color-text-primary);
  border-radius: var(--radius-full);
  transition: var(--transition);
}

.header__hamburger-line:nth-child(1) { width: 20px; }
.header__hamburger-line:nth-child(2) { width: 14px; }
.header__hamburger-line:nth-child(3) { width: 20px; }

/* État ouvert hamburger */
.header__hamburger[aria-expanded="true"] .header__hamburger-line:nth-child(1) {
  transform: rotate(45deg) translate(5px, 5px);
  width: 20px;
}

.header__hamburger[aria-expanded="true"] .header__hamburger-line:nth-child(2) {
  opacity: 0;
  transform: translateX(-8px);
}

.header__hamburger[aria-expanded="true"] .header__hamburger-line:nth-child(3) {
  transform: rotate(-45deg) translate(5px, -5px);
  width: 20px;
}

/* ──────────────────────────────────────────
   MOBILE MENU
────────────────────────────────────────── */
.header__mobile {
  display: none;
  position: fixed;
  top: var(--header-height-sm);
  left: 0;
  right: 0;
  bottom: 0;
  background: var(--color-surface);
  overflow-y: auto;
  z-index: calc(var(--z-sticky) - 1);
  padding: var(--space-4) var(--space-4) var(--space-8);
  transform: translateX(100%);
  transition: transform 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

.header__mobile.is-open {
  display: block;
  transform: translateX(0);
}

.header__mobile-nav {
  display: flex;
  flex-direction: column;
  border-top: 1px solid var(--color-border);
  margin-top: var(--space-2);
}

.header__mobile-link {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: var(--space-4) var(--space-2);
  font-family: var(--font-body);
  font-size: var(--text-base);
  font-weight: var(--font-medium);
  color: var(--color-text-primary);
  text-decoration: none;
  border-bottom: 1px solid var(--color-border);
  transition: color 0.2s;
}

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

/* Sous-menu mobile (services) */
.header__mobile-sub {
  display: none;
  background: var(--color-bg);
  padding: var(--space-2) 0;
}

.header__mobile-sub.is-open {
  display: block;
}

.header__mobile-sub-link {
  display: flex;
  align-items: center;
  gap: var(--space-3);
  padding: var(--space-3) var(--space-6);
  font-size: var(--text-sm);
  color: var(--color-text-secondary);
  text-decoration: none;
  transition: color 0.2s;
}

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

.header__mobile-sub-icon {
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--color-primary);
  flex-shrink: 0;
}

.header__mobile-cta {
  margin-top: var(--space-6);
  padding: var(--space-4) var(--space-2);
}

/* ──────────────────────────────────────────
   RESPONSIVE
────────────────────────────────────────── */
@media (max-width: 1024px) {
  .header__nav {
    display: none;
  }

  .header__hamburger {
    display: flex;
  }

  .header__container {
    height: var(--header-height-sm);
    padding: 0 var(--space-4);
  }
}

@media (max-width: 480px) {
  .header__logo-img {
    height: 32px;
  }
}