/* ============================================
   HEADER & NAVIGATION
   ============================================ */

#header-root {
    min-height: var(--header-height);
}

header {
    position: fixed;
    top: 0;
    width: 100%;
    height: var(--header-height);
    background-color: rgba(255, 255, 255, 0.92);
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 0 var(--page-padding);
    z-index: 1000;
    transition: transform var(--transition-base);
    border-bottom: 1px solid var(--color-gray-200);
}

header.nav-up {
    transform: translateY(-100%);
}

/* Logo */
.logo {
    display: flex;
    align-items: center;
    gap: var(--space-2);
}

.logo-text {
    font-size: 1.35rem;
    font-weight: 800;
    letter-spacing: -0.5px;
    color: var(--color-black);
}

/* Nav Links */
.nav-links {
    display: flex;
    gap: var(--space-8);
    align-items: center;
}

.nav-link {
    font-weight: 500;
    font-size: 0.95rem;
    color: var(--color-gray-600);
    position: relative;
    padding: var(--space-2) 0;
    transition: color var(--transition-fast);
}

.nav-link:hover,
.nav-link.active {
    color: var(--color-black);
}

.nav-link::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 50%;
    width: 0;
    height: 2px;
    background-color: var(--color-black);
    transition: width var(--transition-base), left var(--transition-base);
}

.nav-link:hover::after,
.nav-link.active::after {
    width: 100%;
    left: 0;
}

/* Dropdown - kept for non-mega dropdowns */
.dropdown {
    position: static;
}

.dropdown-content {
    display: none;
    position: absolute;
    top: 100%;
    left: 50%;
    transform: translateX(-50%);
    background-color: var(--color-white);
    min-width: 200px;
    box-shadow: var(--shadow-lg);
    border-radius: var(--radius-sm);
    overflow: hidden;
    border: 1px solid var(--color-gray-200);
    padding: var(--space-1) 0;
    margin-top: var(--space-2);
}

.dropdown-content a {
    padding: var(--space-3) var(--space-4);
    display: block;
    font-weight: 400;
    font-size: 0.9rem;
    color: var(--color-gray-600);
    transition: background-color var(--transition-fast), color var(--transition-fast);
}

.dropdown-content a:hover {
    background-color: var(--color-gray-50);
    color: var(--color-black);
}

.dropdown:hover .dropdown-content {
    display: block;
}

/* Mega Menu */
.mega-menu {
    position: absolute;
    top: 100%;
    left: 0;
    width: 100%;
    background-color: var(--color-white);
    border-top: 1px solid var(--color-gray-200);
    box-shadow: 0 12px 32px rgba(0, 0, 0, 0.08);
    opacity: 0;
    visibility: hidden;
    transform: translateY(-4px);
    transition: opacity var(--transition-base), transform var(--transition-base), visibility var(--transition-base);
    z-index: 999;
}

.dropdown:hover .mega-menu {
    opacity: 1;
    visibility: visible;
    transform: translateY(0);
}

.mega-menu-inner {
    max-width: var(--max-width);
    margin: 0 auto;
    padding: var(--space-8) var(--page-padding);
}

.mega-menu-sections {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: var(--space-8);
}

.mega-section-title {
    font-size: 0.7rem;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 1px;
    color: var(--color-gray-400);
    margin-bottom: var(--space-3);
    padding-bottom: var(--space-2);
    border-bottom: 1px solid var(--color-gray-100);
}

.mega-section-links {
    display: flex;
    flex-direction: column;
    gap: 0;
}

.mega-menu-link {
    display: block;
    padding: var(--space-2) var(--space-3);
    border-radius: var(--radius-sm);
    font-size: 0.9rem;
    font-weight: 500;
    color: var(--color-gray-700);
    transition: background-color var(--transition-fast), color var(--transition-fast);
}

.mega-menu-link:hover {
    background-color: var(--color-gray-50);
    color: var(--color-black);
}

.mega-menu-coming-soon {
    padding: var(--space-2) var(--space-3);
    font-size: 0.85rem;
    color: var(--color-gray-400);
    font-style: italic;
}

/* Nav Actions */
.nav-actions {
    display: flex;
    align-items: center;
    gap: var(--space-5);
}

.cart-link {
    position: relative;
    display: flex;
    align-items: center;
    color: var(--color-gray-600);
    transition: color var(--transition-fast);
}

.cart-link:hover {
    color: var(--color-black);
}

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

.cart-badge {
    position: absolute;
    top: -6px;
    right: -8px;
    background-color: var(--color-black);
    color: var(--color-white);
    font-size: 0.65rem;
    font-weight: 700;
    width: 18px;
    height: 18px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    line-height: 1;
}

.cart-badge.hidden {
    display: none;
}

.cart-badge.bounce {
    animation: badgeBounce 0.3s ease;
}

@keyframes badgeBounce {
    0%, 100% { transform: scale(1); }
    50% { transform: scale(1.3); }
}

.header-cta {
    font-size: 0.85rem;
    padding: var(--space-2) var(--space-5);
}

/* Hamburger */
.hamburger {
    display: none;
    flex-direction: column;
    gap: 5px;
    padding: var(--space-2);
    cursor: pointer;
}

.hamburger span {
    width: 22px;
    height: 2px;
    background-color: var(--color-black);
    border-radius: 2px;
    transition: var(--transition-fast);
}

/* Mobile Menu Overlay */
.mobile-menu {
    position: fixed;
    top: 0;
    right: 0;
    width: 100%;
    height: 100vh;
    background-color: var(--color-white);
    z-index: 1001;
    transform: translateX(100%);
    transition: transform var(--transition-base);
    display: flex;
    flex-direction: column;
    overflow-y: auto;
    -webkit-overflow-scrolling: touch;
}

.mobile-menu.open {
    transform: translateX(0);
}

.mobile-menu-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: var(--space-5) var(--page-padding);
    border-bottom: 1px solid var(--color-gray-200);
    min-height: var(--header-height);
    flex-shrink: 0;
}

.mobile-close {
    padding: var(--space-2);
    color: var(--color-black);
    background: none;
    border: none;
    cursor: pointer;
}

.mobile-nav {
    display: flex;
    flex-direction: column;
    padding: var(--space-4) var(--page-padding) var(--space-8);
}

.mobile-nav-link {
    display: flex;
    align-items: center;
    gap: var(--space-3);
    padding: var(--space-4) var(--space-3);
    font-size: 1.1rem;
    font-weight: 600;
    color: var(--color-black);
    border-radius: var(--radius-sm);
    transition: background-color var(--transition-fast);
}

.mobile-nav-link:active {
    background-color: var(--color-gray-50);
}

.mobile-nav-sub {
    font-weight: 500;
    font-size: 1rem;
    color: var(--color-gray-600);
    padding: var(--space-3) var(--space-3) var(--space-3) var(--space-6);
}

.mobile-nav-section {
    margin-top: var(--space-2);
    padding-bottom: var(--space-1);
    border-bottom: 1px solid var(--color-gray-100);
    margin-bottom: var(--space-1);
}

.mobile-nav-label {
    display: block;
    padding: var(--space-2) var(--space-3);
    font-size: 0.7rem;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 1px;
    color: var(--color-gray-400);
}

.mobile-nav-cart {
    margin-top: var(--space-4);
    padding-top: var(--space-4);
    border-top: 1px solid var(--color-gray-200);
}

.mobile-cart-count {
    color: var(--color-gray-500);
    font-weight: 500;
}

/* Responsive */
@media (max-width: 768px) {
    .nav-links {
        display: none;
    }

    .header-cta {
        display: none;
    }

    .hamburger {
        display: flex;
    }
}