/* ============================================
   BYA — Institut de beauté
   HEADER — barre de navigation, méga-menu, menu mobile
   ============================================ */

.site-header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 60;
  height: var(--header-h);
  transition: background 0.45s var(--ease), box-shadow 0.45s var(--ease), backdrop-filter 0.45s;
}

.site-header.is-scrolled,
.site-header.is-solid {
  background: rgba(251, 246, 240, 0.92);
  backdrop-filter: blur(16px);
  box-shadow: 0 1px 0 var(--line);
}

.header-inner {
  height: 100%;
  width: min(1360px, calc(100% - 36px));
  margin-inline: auto;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
}

.brand {
  display: flex;
  align-items: center;
  gap: 12px;
  z-index: 62;
}

.brand .logo-badge {
  width: 50px;
  height: 50px;
  transition: transform 0.4s var(--ease);
}

.brand:hover .logo-badge {
  transform: scale(1.05);
}

.nav-desktop {
  display: none;
  align-items: stretch;
  height: 100%;
  gap: 8px;
}

.nav-link {
  display: flex;
  align-items: center;
  height: 100%;
  padding: 10px 14px;
  font-family: var(--font-label);
  font-size: 0.62rem;
  letter-spacing: 0.22em;
  text-transform: uppercase;
  color: var(--ink);
  position: relative;
  z-index: 1;
}

.nav-link::after {
  content: "";
  position: absolute;
  left: 14px;
  right: 14px;
  bottom: 6px;
  height: 1px;
  background: var(--bronze);
  transform: scaleX(0);
  transform-origin: left;
  transition: transform 0.4s var(--ease);
}

.nav-link:hover::after,
.nav-link.is-active::after {
  transform: scaleX(1);
}

.nav-cta {
  align-self: center;
  margin-left: 10px;
  min-height: 42px;
  padding: 0 18px;
}

.has-mega {
  position: static;
  display: flex;
  align-items: center;
  height: 100%;
}

.mega {
  position: absolute;
  top: 100%;
  left: 50%;
  transform: translateX(-50%) translateY(10px);
  width: min(1180px, calc(100vw - 48px));
  background: rgba(251, 246, 240, 0.98);
  border: 1px solid var(--line);
  border-top: none;
  box-shadow: var(--shadow);
  padding: 32px;
  display: grid;
  grid-template-columns: 280px 1fr;
  gap: 28px;
  opacity: 0;
  visibility: hidden;
  pointer-events: none;
  /* Only animate opacity/transform — visibility & pointer-events must flip
     instantly so the panel never blocks (or fails to receive) clicks
     during the fade, and there's no dead zone under the trigger. */
  transition: opacity 0.32s var(--ease), transform 0.32s var(--ease);
  z-index: 70;
  backdrop-filter: blur(16px);
}

.has-mega:hover .mega,
.has-mega:focus-within .mega,
.has-mega.is-open .mega {
  opacity: 1;
  visibility: visible;
  pointer-events: auto;
  transform: translateX(-50%) translateY(0);
}

.site-header.is-transparent {
  background: transparent;
  box-shadow: none;
}

.site-header.is-transparent .nav-link {
  color: var(--ivory);
}

.site-header.is-transparent .nav-link::after {
  background: var(--gold-bright);
}

.site-header:has(.has-mega:hover),
.site-header:has(.has-mega.is-open) {
  background: rgba(251, 246, 240, 0.96);
  backdrop-filter: blur(16px);
}

.site-header:has(.has-mega:hover).is-transparent .nav-link,
.site-header:has(.has-mega.is-open).is-transparent .nav-link {
  color: var(--ink);
}

.mega-feature {
  position: relative;
  min-height: 280px;
  overflow: hidden;
}

.mega-feature img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform 1.1s var(--ease);
}

.mega-feature:hover img {
  transform: scale(1.08);
}

.mega-feature span {
  position: absolute;
  inset: auto 16px 16px 16px;
  color: var(--ivory);
  font-family: var(--font-serif);
  font-size: 1.5rem;
}

.mega-cols {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 8px 28px;
}

.mega-col h3 {
  font-family: var(--font-label);
  font-size: 0.62rem;
  letter-spacing: 0.24em;
  text-transform: uppercase;
  color: var(--bronze);
  margin-bottom: 12px;
  padding-bottom: 8px;
  border-bottom: 1px solid var(--line);
}

.mega-col a {
  display: flex;
  justify-content: space-between;
  gap: 12px;
  padding: 8px 0;
  font-size: 0.92rem;
  color: var(--ink);
  border-bottom: 1px solid transparent;
  transition: 0.3s;
}

.mega-col a:hover {
  color: var(--bronze);
  padding-left: 6px;
}

.mega-col a em {
  font-style: normal;
  color: var(--muted);
  font-family: var(--font-label);
  font-size: 0.62rem;
  letter-spacing: 0.08em;
}

.nav-toggle {
  width: 44px;
  height: 44px;
  position: relative;
  z-index: 62;
  display: grid;
  place-items: center;
}

.nav-toggle span,
.nav-toggle span::before,
.nav-toggle span::after {
  display: block;
  width: 22px;
  height: 1px;
  background: var(--espresso);
  position: relative;
  transition: 0.35s var(--ease);
}

.nav-toggle span::before,
.nav-toggle span::after {
  content: "";
  position: absolute;
  left: 0;
}

.nav-toggle span::before { top: -7px; }
.nav-toggle span::after { top: 7px; }

.nav-toggle.is-open span {
  background: transparent;
}

.nav-toggle.is-open span::before {
  top: 0;
  transform: rotate(45deg);
}

.nav-toggle.is-open span::after {
  top: 0;
  transform: rotate(-45deg);
}

.site-header.is-transparent .nav-toggle span,
.site-header.is-transparent .nav-toggle span::before,
.site-header.is-transparent .nav-toggle span::after {
  background: var(--ivory);
}

.site-header.is-transparent .nav-toggle.is-open span::before,
.site-header.is-transparent .nav-toggle.is-open span::after {
  background: var(--ivory);
}

/* Mobile menu */
.nav-mobile {
  position: fixed;
  inset: 0;
  z-index: 61;
  background: linear-gradient(160deg, var(--espresso) 0%, #34231a 100%);
  color: var(--ivory);
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  padding: 110px 28px 36px;
  clip-path: inset(0 0 100% 0);
  transition: clip-path 0.8s var(--ease);
}

.nav-mobile.is-open {
  clip-path: inset(0 0 0 0);
}

.nav-mobile a,
.nav-mobile button.mobile-link {
  display: flex;
  align-items: baseline;
  gap: 16px;
  width: 100%;
  text-align: left;
  color: var(--ivory);
  font-family: var(--font-serif);
  font-size: clamp(2rem, 8vw, 3.1rem);
  line-height: 1.05;
  padding: 8px 0;
  border-bottom: 1px solid rgba(232, 220, 200, 0.18);
  transform: translateY(24px);
  opacity: 0;
}

.nav-mobile.is-open a,
.nav-mobile.is-open button.mobile-link {
  animation: rise 0.7s var(--ease) forwards;
}

.nav-mobile.is-open li:nth-child(1) a { animation-delay: 0.12s; }
.nav-mobile.is-open li:nth-child(2) button,
.nav-mobile.is-open li:nth-child(2) a { animation-delay: 0.2s; }
.nav-mobile.is-open li:nth-child(3) a { animation-delay: 0.28s; }
.nav-mobile.is-open li:nth-child(4) a { animation-delay: 0.36s; }
.nav-mobile.is-open li:nth-child(5) a { animation-delay: 0.44s; }

.nav-mobile .num {
  font-family: var(--font-label);
  font-size: 0.62rem;
  letter-spacing: 0.2em;
  color: var(--gold);
}

.mobile-sub {
  display: none;
  padding: 8px 0 16px 42px;
}

.mobile-sub.is-open {
  display: grid;
  gap: 8px;
}

.mobile-sub a {
  font-size: 1.05rem !important;
  font-family: var(--font-sans) !important;
  letter-spacing: 0.04em;
  border: none !important;
  opacity: 0.85;
  padding: 4px 0 !important;
}

.nav-mobile-foot {
  display: flex;
  justify-content: space-between;
  align-items: end;
  gap: 16px;
  font-size: 0.85rem;
  color: var(--sand);
}

@media (min-width: 980px) {
  .nav-desktop { display: flex; }
  .nav-toggle { display: none; }
  .nav-mobile { display: none; }

  .mega-cols {
    grid-template-columns: repeat(2, 1fr);
  }
}

@media (min-width: 1200px) {
  .mega {
    grid-template-columns: 300px 1fr;
  }

  .mega-cols {
    grid-template-columns: repeat(2, 1fr);
  }
}