/* ===== Site Header ===== */
.site-header {
  background: var(--color-primary-dark);
  position: sticky;
  top: 0;
  z-index: var(--z-sticky);
  box-shadow: var(--shadow-md);
}

.site-header .fda-banner ~ & {
  top: auto;
}

.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 70px;
}

/* Logo */
.logo {
  display: flex;
  align-items: center;
  gap: var(--space-3);
  text-decoration: none;
  color: var(--color-white);
  flex-shrink: 0;
}

.logo__icon {
  width: 38px;
  height: 38px;
}

.logo__text {
  font-family: var(--font-heading);
  font-weight: var(--weight-bold);
  font-size: var(--text-lg);
  letter-spacing: 0.05em;
  text-transform: uppercase;
  line-height: 1.1;
}

.logo__tagline {
  font-size: var(--text-xs);
  font-weight: var(--weight-normal);
  letter-spacing: 0.12em;
  opacity: 0.7;
  text-transform: uppercase;
}

/* Main navigation */
.main-nav {
  display: flex;
  align-items: center;
  gap: var(--space-1);
}

.main-nav__link {
  display: block;
  padding: var(--space-2) var(--space-4);
  color: rgba(255, 255, 255, 0.85);
  font-size: var(--text-sm);
  font-weight: var(--weight-medium);
  border-radius: var(--radius-md);
  transition: all var(--transition-fast);
}

.main-nav__link:hover,
.main-nav__link--active {
  color: var(--color-white);
  background: rgba(255, 255, 255, 0.1);
}

/* Header actions (cart) */
.header-actions {
  display: flex;
  align-items: center;
  gap: var(--space-4);
}

.cart-btn {
  position: relative;
  display: flex;
  align-items: center;
  gap: var(--space-2);
  color: var(--color-white);
  padding: var(--space-2) var(--space-3);
  border-radius: var(--radius-md);
  transition: background var(--transition-fast);
}

.cart-btn:hover {
  background: rgba(255, 255, 255, 0.1);
}

.cart-btn__icon {
  width: 22px;
  height: 22px;
}

.cart-btn__count {
  position: absolute;
  top: -2px;
  right: -2px;
  width: 20px;
  height: 20px;
  background: var(--color-accent);
  color: var(--color-white);
  font-size: 11px;
  font-weight: var(--weight-bold);
  border-radius: var(--radius-full);
  display: flex;
  align-items: center;
  justify-content: center;
}

.cart-btn__count:empty,
.cart-btn__count[data-count="0"] {
  display: none;
}

/* Mobile menu toggle */
.mobile-menu-btn {
  display: none;
  flex-direction: column;
  justify-content: center;
  gap: 5px;
  width: 32px;
  height: 32px;
  color: var(--color-white);
}

.mobile-menu-btn span {
  display: block;
  width: 24px;
  height: 2px;
  background: currentColor;
  border-radius: 2px;
  transition: all var(--transition-fast);
}

.mobile-menu-btn--open span:nth-child(1) {
  transform: translateY(7px) rotate(45deg);
}
.mobile-menu-btn--open span:nth-child(2) {
  opacity: 0;
}
.mobile-menu-btn--open span:nth-child(3) {
  transform: translateY(-7px) rotate(-45deg);
}

/* Mobile navigation */
.mobile-nav {
  display: none;
  background: var(--color-primary-dark);
  border-top: 1px solid rgba(255, 255, 255, 0.1);
  padding: var(--space-4);
}

.mobile-nav--open {
  display: block;
}

.mobile-nav__link {
  display: block;
  padding: var(--space-3) var(--space-4);
  color: rgba(255, 255, 255, 0.85);
  font-size: var(--text-base);
  font-weight: var(--weight-medium);
  border-radius: var(--radius-md);
  transition: all var(--transition-fast);
}

.mobile-nav__link:hover,
.mobile-nav__link--active {
  color: var(--color-white);
  background: rgba(255, 255, 255, 0.1);
}

/* Responsive */
@media (max-width: 1024px) {
  .main-nav { display: none; }
  .mobile-menu-btn { display: flex; }
}