/* ================================================================
   Header Styles
   ================================================================ */

/* ── Base ────────────────────────────────────────────────────────── */
.site-header {
  position: relative;
  top: 0;
  left: 0;
  right: 0;
  z-index: var(--z-sticky);
  background: rgba(250,250,248,.88);
  backdrop-filter: saturate(180%) blur(20px);
  -webkit-backdrop-filter: saturate(180%) blur(20px);
  border-bottom: 1px solid var(--color-border);
  transition: box-shadow var(--duration-base) var(--ease);
}
.site-header--sticky {
  position: sticky;
}
.site-header.is-scrolled {
  box-shadow: var(--shadow-sm);
}

.site-header__inner {
  display: flex;
  align-items: center;
  gap: var(--space-8);
  height: 64px;
}

/* ── Logo ────────────────────────────────────────────────────────── */
.site-header__logo {
  flex-shrink: 0;
  text-decoration: none;
}
.site-header__logo-text {
  font-size: var(--text-lg);
  font-weight: var(--weight-semibold);
  letter-spacing: -.04em;
  color: var(--color-text);
}

/* ── Nav ─────────────────────────────────────────────────────────── */
.site-header__nav {
  flex: 1;
  display: flex;
  justify-content: center;
}
.site-header__nav-list {
  display: flex;
  align-items: center;
  gap: var(--space-1);
  list-style: none;
}
.site-header__nav-link {
  display: block;
  padding: var(--space-2) var(--space-4);
  font-size: var(--text-sm);
  font-weight: var(--weight-medium);
  color: var(--color-text);
  border-radius: var(--radius-full);
  transition: background var(--duration-fast) var(--ease);
}
.site-header__nav-link:hover {
  background: var(--color-accent-light);
}

/* ── Mega Menu ───────────────────────────────────────────────────── */
.has-dropdown { position: relative; }
.mega-menu {
  position: absolute;
  top: calc(100% + var(--space-3));
  left: 50%;
  transform: translateX(-50%);
  width: 680px;
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-xl);
  box-shadow: var(--shadow-xl);
  padding: var(--space-8);
  opacity: 0;
  visibility: hidden;
  transform: translateX(-50%) translateY(-8px);
  transition: opacity var(--duration-base) var(--ease),
              transform var(--duration-base) var(--ease),
              visibility var(--duration-base);
  pointer-events: none;
}
.has-dropdown:hover .mega-menu,
.has-dropdown:focus-within .mega-menu {
  opacity: 1;
  visibility: visible;
  transform: translateX(-50%) translateY(0);
  pointer-events: auto;
}
.mega-menu__inner {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: var(--space-6);
  padding: 0;
}
.mega-menu__label {
  display: block;
  font-size: var(--text-xs);
  font-weight: var(--weight-semibold);
  letter-spacing: .1em;
  text-transform: uppercase;
  color: var(--color-text-3);
  margin-bottom: var(--space-3);
}
.mega-menu__col ul { list-style: none; }
.mega-menu__col ul li { margin-bottom: var(--space-2); }
.mega-menu__col ul a {
  font-size: var(--text-sm);
  color: var(--color-text-2);
  transition: color var(--duration-fast) var(--ease);
}
.mega-menu__col ul a:hover { color: var(--color-text); }

/* ── Actions ─────────────────────────────────────────────────────── */
.site-header__actions {
  display: flex;
  align-items: center;
  gap: var(--space-1);
  flex-shrink: 0;
}
.site-header__action-btn {
  color: var(--color-text);
}
.site-header__action-btn:hover {
  background: var(--color-accent-light);
}
.site-header__cart {
  position: relative;
  display: flex;
  align-items: center;
  justify-content: center;
  width: 44px;
  height: 44px;
  border-radius: var(--radius-full);
  color: var(--color-text);
  transition: background var(--duration-fast) var(--ease);
}
.site-header__cart:hover { background: var(--color-accent-light); }
.site-header__cart-count {
  position: absolute;
  top: 6px; right: 6px;
  min-width: 16px; height: 16px;
  padding: 0 3px;
  background: var(--color-accent);
  color: #fff;
  font-size: 10px;
  font-weight: var(--weight-semibold);
  line-height: 16px;
  text-align: center;
  border-radius: var(--radius-full);
  display: none;
}
.site-header__cart-count.visible { display: block; }
.site-header__hamburger { display: none; }

/* ── Mobile Nav ──────────────────────────────────────────────────── */
.mobile-nav {
    display:none;
  position: fixed;
  inset: 0;
  background: var(--color-surface);
  z-index: var(--z-modal);
  transform: translateX(100%);
  transition: transform var(--duration-slow) var(--ease);
}
.mobile-nav.is-open {
  transform: translateX(0);
}
.mobile-nav__inner {
  padding: 100px var(--space-8) var(--space-8);
  display: flex;
  flex-direction: column;
}
.mobile-nav__link {
  padding: var(--space-4) 0;
  font-size: var(--text-xl);
  font-weight: var(--weight-semibold);
  letter-spacing: -.02em;
  color: var(--color-text);
  border-bottom: 1px solid var(--color-border);
}
.mobile-nav__link:last-child { border-bottom: none; }

/* ── Search Overlay ──────────────────────────────────────────────── */
.search-overlay {
  position: fixed;
  inset: 0;
  background: rgba(250,250,248,.95);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  z-index: var(--z-overlay);
  display: flex;
  align-items: flex-start;
  padding-top: 120px;
  opacity: 0;
  visibility: hidden;
  transition: opacity var(--duration-base) var(--ease),
              visibility var(--duration-base);
}
.search-overlay.is-open {
  opacity: 1;
  visibility: visible;
}
.search-overlay__box {
  width: 100%;
  max-width: 640px;
  margin-inline: auto;
  padding-inline: var(--container-pad);
  position: relative;
}
.search-overlay__input {
  width: 100%;
  height: 60px;
  padding: 0 56px 0 var(--space-6);
  font-size: var(--text-xl);
  font-weight: var(--weight-light);
  background: transparent;
  border: none;
  border-bottom: 1.5px solid var(--color-text);
  outline: none;
  color: var(--color-text);
  letter-spacing: -.02em;
}
.search-overlay__input::placeholder { color: var(--color-text-3); }
.search-overlay__close {
  position: absolute;
  right: var(--container-pad);
  top: 50%;
  transform: translateY(-50%);
  color: var(--color-text-2);
  padding: var(--space-2);
  border-radius: var(--radius-full);
  transition: color var(--duration-fast);
}
.search-overlay__close:hover { color: var(--color-text); }

/* ── Responsive ──────────────────────────────────────────────────── */
@media (max-width: 1024px) {
  .site-header__nav { display: none; }
  .site-header__hamburger { display: flex; }
}
@media (max-width: 768px) {
  .site-header__inner { gap: var(--space-4); }
  .site-header__action-btn:not(.site-header__hamburger) { display: none; }
  .site-header__cart { display: flex; }
}