.site-header {
  position: sticky;
  top: 0;
  z-index: 40;
  background: var(--color-surface);
  border-bottom: 1px solid var(--color-border);
}

.site-header__inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-6);
  padding-top: var(--space-4);
  padding-bottom: var(--space-4);
}

.site-header__logo img { display: block; }

.site-header__nav {
  display: flex;
  align-items: center;
  gap: var(--space-6);
  font-weight: 500;
  font-size: var(--fs-md);
}

.site-header__nav > a {
  color: var(--color-forest-900);
  padding: var(--space-2) 0;
  border-bottom: 2px solid transparent;
  transition: color var(--transition-fast), border-color var(--transition-fast);
}

.site-header__nav > a:hover {
  color: var(--color-forest-500);
  border-color: var(--color-lime-500);
}

/* Mega menu */
.nav-item { position: relative; }

.nav-item__trigger {
  display: flex;
  align-items: center;
  gap: var(--space-1);
  background: none;
  border: none;
  padding: var(--space-2) 0;
  font: inherit;
  font-weight: 500;
  color: var(--color-forest-900);
  border-bottom: 2px solid transparent;
  transition: color var(--transition-fast), border-color var(--transition-fast);
}

.nav-item__trigger svg { transition: transform var(--transition-fast); }

.nav-item--mega:hover .nav-item__trigger,
.nav-item--open .nav-item__trigger {
  color: var(--color-forest-500);
  border-color: var(--color-lime-500);
}

.nav-item--mega:hover .nav-item__trigger svg,
.nav-item--open .nav-item__trigger svg {
  transform: rotate(180deg);
}

.mega-menu {
  position: absolute;
  top: calc(100% + 14px);
  left: 50%;
  transform: translateX(-50%);
  width: 640px;
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-lg);
  padding: var(--space-6);
  opacity: 0;
  visibility: hidden;
  transform: translateX(-50%) translateY(6px);
  transition: opacity var(--transition-base), transform var(--transition-base), visibility var(--transition-base);
}

.nav-item--mega:hover .mega-menu,
.nav-item--open .mega-menu {
  opacity: 1;
  visibility: visible;
  transform: translateX(-50%) translateY(0);
}

.mega-menu__grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: var(--space-4);
}

.mega-menu__item {
  display: flex;
  align-items: center;
  gap: var(--space-3);
  padding: var(--space-2);
  border-radius: var(--radius-md);
  font-weight: 600;
  font-size: var(--fs-sm);
  color: var(--color-forest-900);
  transition: background var(--transition-fast);
}

.mega-menu__item:hover { background: var(--color-forest-100); }

.mega-menu__thumb {
  display: block;
  width: 44px;
  height: 44px;
  border-radius: var(--radius-sm);
  overflow: hidden;
  flex-shrink: 0;
}

.mega-menu__thumb img { width: 100%; height: 100%; object-fit: cover; }

.mega-menu__all {
  display: block;
  margin-top: var(--space-5);
  padding-top: var(--space-4);
  border-top: 1px solid var(--color-border);
  font-size: var(--fs-sm);
  font-weight: 600;
  color: var(--color-forest-700);
}

/* Store info */
.site-header__actions {
  display: flex;
  align-items: center;
  gap: var(--space-4);
}

.store-info {
  display: flex;
  align-items: center;
  gap: var(--space-2);
  padding-right: var(--space-4);
  border-right: 1px solid var(--color-border);
  color: var(--color-forest-700);
}

.store-info__text {
  display: flex;
  flex-direction: column;
  font-size: var(--fs-xs);
  line-height: 1.4;
  white-space: nowrap;
}

.store-info__text span:first-child {
  font-weight: 700;
  color: var(--color-forest-900);
  font-size: var(--fs-sm);
}

.store-info__text span:last-child {
  color: var(--color-text-muted);
}

.icon-btn {
  position: relative;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 40px;
  height: 40px;
  border-radius: var(--radius-pill);
  background: transparent;
  border: none;
  color: var(--color-forest-900);
  transition: background var(--transition-fast);
}

.icon-btn:hover { background: var(--color-forest-100); }

.icon-btn--active::after {
  content: '';
  position: absolute;
  top: 6px;
  right: 6px;
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--color-lime-500);
  border: 2px solid var(--color-surface);
}

.icon-btn--cart {
  width: auto;
  padding: 0 var(--space-3);
  gap: var(--space-2);
}

.icon-btn--cart .cart-count {
  font-size: var(--fs-sm);
  font-weight: 700;
}

.mobile-nav-toggle { display: none; }

@media (max-width: 980px) {
  .store-info__text { display: none; }
}

@media (max-width: 860px) {
  .site-header__nav { display: none; }
  .mobile-nav-toggle { display: inline-flex; order: -1; }
}