/* ============================================================
   NAVIGATION
   ============================================================ */

.site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  background: var(--color-surface);
  border-bottom: 1px solid var(--color-border);
  box-shadow: var(--shadow-sm);
}

.nav-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 68px;
}

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

.nav-logo-wordmark {
  display: flex;
  flex-direction: column;
  line-height: 1.1;
}

.nav-logo-wordmark .brand-name {
  font-family: var(--font-display);
  font-size: 1.05rem;
  font-weight: 700;
  color: var(--color-text);
  white-space: nowrap;
}

.nav-logo-wordmark .brand-sub {
  font-size: var(--text-xs);
  color: var(--color-text-muted);
  letter-spacing: 0.06em;
  font-weight: 500;
}

/* Nav links */
.nav-links {
  display: flex;
  align-items: center;
  gap: var(--space-1);
  list-style: none;
}

.nav-links a {
  font-size: var(--text-sm);
  font-weight: 500;
  color: var(--color-text-muted);
  padding: var(--space-2) var(--space-3);
  border-radius: var(--radius-md);
  text-decoration: none;
  transition: color var(--transition-interactive), background var(--transition-interactive);
}

.nav-links a:hover,
.nav-links a.active {
  color: var(--color-text);
  background: var(--color-surface-offset);
}

/* Dropdown */
.nav-dropdown {
  position: relative;
}

.nav-dropdown-toggle {
  display: flex;
  align-items: center;
  gap: var(--space-1);
  font-size: var(--text-sm);
  font-weight: 500;
  color: var(--color-text-muted);
  padding: var(--space-2) var(--space-3);
  border-radius: var(--radius-md);
  cursor: pointer;
  transition: color var(--transition-interactive), background var(--transition-interactive);
  background: none;
  border: none;
}

.nav-dropdown-toggle:hover {
  color: var(--color-text);
  background: var(--color-surface-offset);
}

.nav-dropdown-toggle svg {
  transition: transform var(--transition-interactive);
}

.nav-dropdown:hover .nav-dropdown-toggle svg {
  transform: rotate(180deg);
}

.nav-dropdown-menu {
  position: absolute;
  top: calc(100% + var(--space-2));
  left: 50%;
  transform: translateX(-50%);
  min-width: 200px;
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-lg);
  padding: var(--space-2);
  opacity: 0;
  pointer-events: none;
  transition: opacity var(--transition-fast);
  z-index: 200;
}

.nav-dropdown:hover .nav-dropdown-menu,
.nav-dropdown:focus-within .nav-dropdown-menu {
  opacity: 1;
  pointer-events: all;
}

.nav-dropdown-menu a {
  display: block;
  padding: var(--space-3) var(--space-4);
  font-size: var(--text-sm);
  color: var(--color-text-muted);
  border-radius: var(--radius-md);
}

.nav-dropdown-menu a:hover {
  color: var(--color-text);
  background: var(--color-surface-offset);
}

/* Right side */
.nav-actions {
  display: flex;
  align-items: center;
  gap: var(--space-3);
}

.theme-toggle {
  width: 36px;
  height: 36px;
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: var(--radius-md);
  color: var(--color-text-muted);
  transition: color var(--transition-interactive), background var(--transition-interactive);
  border: none;
  background: none;
  cursor: pointer;
}

.theme-toggle:hover {
  color: var(--color-text);
  background: var(--color-surface-offset);
}

/* Cart icon */
.cart-icon {
  position: relative;
  width: 36px;
  height: 36px;
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: var(--radius-md);
  color: var(--color-text-muted);
  text-decoration: none;
  transition: color var(--transition-interactive), background var(--transition-interactive);
}

.cart-icon:hover {
  color: var(--color-text);
  background: var(--color-surface-offset);
}

.cart-count {
  position: absolute;
  top: 2px;
  right: 2px;
  width: 16px;
  height: 16px;
  background: var(--color-primary);
  color: #fff;
  font-size: 10px;
  font-weight: 700;
  border-radius: var(--radius-full);
  display: flex;
  align-items: center;
  justify-content: center;
  display: none;
}

.cart-count.visible { display: flex; }

/* Hamburger */
.nav-hamburger {
  display: none;
  flex-direction: column;
  gap: 5px;
  width: 36px;
  height: 36px;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  border: none;
  background: none;
}

.nav-hamburger span {
  width: 22px;
  height: 2px;
  background: var(--color-text);
  border-radius: 2px;
  transition: transform var(--transition-interactive), opacity var(--transition-interactive);
}

/* Mobile nav */
.nav-mobile {
  display: none;
  flex-direction: column;
  background: var(--color-surface);
  border-top: 1px solid var(--color-border);
  padding: var(--space-4);
  gap: var(--space-2);
}

.nav-mobile a {
  display: block;
  padding: var(--space-3) var(--space-4);
  font-size: var(--text-base);
  color: var(--color-text-muted);
  border-radius: var(--radius-md);
  text-decoration: none;
  font-weight: 500;
}

.nav-mobile a:hover {
  color: var(--color-text);
  background: var(--color-surface-offset);
}

.nav-mobile .mobile-section-label {
  font-size: var(--text-xs);
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  color: var(--color-text-faint);
  padding: var(--space-3) var(--space-4) var(--space-1);
}

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

@media (max-width: 900px) {
  .nav-links,
  .nav-desktop-only { display: none; }
  .nav-hamburger { display: flex; }
}