/* ========================================
   CSS Variables
   ======================================== */
:root {
    --primary-bg: #ffffff;
    --secondary-bg: #f7f7f7;
    --accent-yellow: #f5a623;
    --accent-yellow-light: #ffd93d;
    --accent-yellow-dark: #e59510;
    --accent-dark: #1a1a1a;
    --text-primary: #1a1a1a;
    --text-secondary: #555555;
    --text-muted: #888888;
    --card-bg: #ffffff;
    --border-color: #e5e5e5;
    --border-light: #f0f0f0;
    --success: #22c55e;
    --error: #ef4444;
    --space-xs: 0.5rem;
    --space-sm: 1rem;
    --space-md: 1.5rem;
    --space-lg: 2rem;
    --space-xl: 3rem;
    --space-2xl: 4rem;
    --transition: 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    --transition-fast: 0.2s ease;
    --shadow-sm: 0 1px 2px rgba(0, 0, 0, 0.05);
    --shadow: 0 4px 12px rgba(0, 0, 0, 0.08);
    --shadow-md: 0 6px 20px rgba(0, 0, 0, 0.1);
    --shadow-lg: 0 12px 40px rgba(0, 0, 0, 0.15);
    --radius-sm: 4px;
    --radius: 8px;
    --radius-lg: 12px;
    --radius-xl: 16px;
}

/* ========================================
   Header - Premium Design
   ======================================== */
.header {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 1000;
    background: var(--primary-bg);
    border-bottom: 1px solid var(--border-light);
    transition: var(--transition);
}

.header.scrolled {
    background: rgba(255, 255, 255, 0.98);
    box-shadow: var(--shadow-sm);
}

.header-inner {
    display: flex;
    align-items: center;
    justify-content: space-between;
    height: 72px;
}

.logo {
    display: flex;
    align-items: center;
    gap: var(--space-sm);
}

.logo-mark {
    width: 40px;
    height: 40px;
    color: var(--accent-yellow);
}

.logo-mark svg {
    width: 100%;
    height: 100%;
}

.logo-text-group {
    display: flex;
    flex-direction: column;
    gap: 2px;
}

.logo-text {
    font-family: 'Bebas Neue', Impact, sans-serif;
    font-size: 1.4rem;
    letter-spacing: 3px;
    color: var(--text-primary);
    line-height: 1;
}

.logo-sub {
    font-size: 0.65rem;
    font-weight: 500;
    color: var(--text-muted);
    letter-spacing: 2px;
}

.nav {
    display: flex;
    align-items: center;
    gap: var(--space-xl);
}

.nav-link {
    font-size: 0.9rem;
    font-weight: 500;
    color: var(--text-secondary);
    position: relative;
    padding: var(--space-xs) 0;
    display: flex;
    align-items: center;
    gap: 4px;
}

.nav-link::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    width: 0;
    height: 2px;
    background: var(--accent-yellow);
    transition: var(--transition);
}

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

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

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

.nav-dropdown-trigger {
    cursor: pointer;
}

.nav-dropdown-icon {
    width: 14px;
    height: 14px;
    transition: transform 0.3s ease;
}

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

.nav-dropdown-menu {
    position: absolute;
    top: 100%;
    left: 50%;
    transform: translateX(-50%) translateY(10px);
    background: var(--primary-bg);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-lg);
    padding: var(--space-md);
    min-width: 320px;
    opacity: 0;
    visibility: hidden;
    transition: all 0.3s ease;
    box-shadow: var(--shadow-lg);
    z-index: 100;
}

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

.nav-dropdown-grid {
    display: grid;
    grid-template-columns: 1fr;
    gap: var(--space-xs);
}

.nav-dropdown-item {
    display: flex;
    align-items: center;
    gap: var(--space-sm);
    padding: var(--space-sm);
    border-radius: var(--radius);
    transition: var(--transition);
}

.nav-dropdown-item:hover {
    background: var(--secondary-bg);
}

.nav-dropdown-icon-wrap {
    font-size: 1.5rem;
    width: 40px;
    height: 40px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: linear-gradient(135deg, var(--accent-yellow) 0%, var(--accent-yellow-light) 100%);
    border-radius: var(--radius);
    flex-shrink: 0;
}

.nav-dropdown-content h4 {
    font-size: 0.9rem;
    font-weight: 600;
    color: var(--text-primary);
    margin-bottom: 2px;
}

.nav-dropdown-content p {
    font-size: 0.75rem;
    color: var(--text-muted);
}

/* Submenu Arrow */
.nav-submenu-arrow {
    width: 16px;
    height: 16px;
    color: var(--text-muted);
    margin-left: auto;
    flex-shrink: 0;
}

/* Third Level Menu */
.nav-submenu {
    position: absolute;
    left: 100%;
    top: 0;
    background: var(--primary-bg);
    border: 1px solid var(--border-color);
    border-radius: var(--radius);
    padding: var(--space-sm);
    min-width: 200px;
    opacity: 0;
    visibility: hidden;
    transform: translateX(10px);
    transition: all 0.3s ease;
    box-shadow: var(--shadow-lg);
    margin-left: var(--space-xs);
}

.nav-dropdown-item.has-submenu:hover .nav-submenu {
    opacity: 1;
    visibility: visible;
    transform: translateX(0);
}

.nav-submenu-item {
    display: block;
    padding: var(--space-xs) var(--space-sm);
    font-size: 0.85rem;
    color: var(--text-secondary);
    border-radius: var(--radius-sm);
    transition: var(--transition);
    white-space: nowrap;
}

.nav-submenu-item:hover {
    background: var(--secondary-bg);
    color: var(--accent-yellow);
}

/* ========================================
   Mega Menu - Ebikes Dropdown
   ======================================== */
.nav-dropdown-mega .nav-dropdown-menu {
    min-width: 700px;
}

.nav-mega-menu {
    display: flex;
    gap: 0;
}

.nav-mega-left {
    width: 280px;
    background: var(--secondary-bg);
    padding: var(--space-sm);
    border-right: 1px solid var(--border-color);
}

.nav-mega-category {
    display: flex;
    align-items: center;
    gap: var(--space-sm);
    padding: var(--space-sm);
    border-radius: var(--radius);
    cursor: pointer;
    transition: var(--transition);
    position: relative;
}

.nav-mega-category:hover,
.nav-mega-category.active {
    background: var(--primary-bg);
}

.nav-mega-category.active {
    border-left: 3px solid var(--accent-yellow);
}

.nav-mega-category-icon {
    font-size: 1.5rem;
    width: 40px;
    height: 40px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: linear-gradient(135deg, var(--accent-yellow) 0%, var(--accent-yellow-light) 100%);
    border-radius: var(--radius);
    flex-shrink: 0;
}

.nav-mega-category-content h4 {
    font-size: 0.9rem;
    font-weight: 600;
    color: var(--text-primary);
    margin-bottom: 2px;
}

.nav-mega-category-content p {
    font-size: 0.75rem;
    color: var(--text-muted);
}

.nav-mega-arrow {
    width: 16px;
    height: 16px;
    color: var(--text-muted);
    margin-left: auto;
    opacity: 0;
    transition: var(--transition);
}

.nav-mega-category:hover .nav-mega-arrow,
.nav-mega-category.active .nav-mega-arrow {
    opacity: 1;
    color: var(--accent-yellow);
}

.nav-mega-right {
    flex: 1;
    padding: var(--space-md);
    background: var(--primary-bg);
    min-height: 300px;
}

.nav-mega-products {
    display: none;
    grid-template-columns: repeat(3, 1fr);
    gap: var(--space-md);
}

.nav-mega-products.active {
    display: grid;
}

.nav-mega-product {
    text-align: center;
    cursor: pointer;
    transition: var(--transition);
    border-radius: var(--radius);
    padding: var(--space-sm);
}

.nav-mega-product:hover {
    background: var(--secondary-bg);
    transform: translateY(-4px);
}

.nav-mega-product-image {
    width: 120px;
    height: 120px;
    margin: 0 auto var(--space-sm);
    border-radius: var(--radius);
    overflow: hidden;
    background: var(--secondary-bg);
}

.nav-mega-product-image img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: transform 0.5s ease;
}

.nav-mega-product:hover .nav-mega-product-image img {
    transform: scale(1.1);
}

.nav-mega-product-info h5 {
    font-size: 0.85rem;
    font-weight: 600;
    color: var(--text-primary);
    margin-bottom: 4px;
}

.nav-mega-product-price {
    font-size: 0.9rem;
    font-weight: 700;
    color: var(--accent-yellow);
}

/* Parts Menu - Wider */
.nav-dropdown-parts .nav-dropdown-menu {
    min-width: 950px;
}

.nav-dropdown-parts .nav-mega-left {
    width: 280px;
}

.nav-dropdown-parts .nav-mega-category {
    padding: var(--space-sm) var(--space-md);
}

.nav-dropdown-parts .nav-mega-category-icon {
    width: 48px;
    height: 48px;
    font-size: 1.5rem;
}

.nav-dropdown-parts .nav-mega-category-content h4 {
    font-size: 1rem;
}

.nav-dropdown-parts .nav-mega-category-content p {
    font-size: 0.8rem;
}

.nav-dropdown-parts .nav-mega-products {
    grid-template-columns: repeat(4, 1fr);
    gap: var(--space-md);
    padding: var(--space-md);
}

.nav-dropdown-parts .nav-mega-product {
    padding: var(--space-sm);
}

.nav-dropdown-parts .nav-mega-product-image {
    width: 140px;
    height: 140px;
    margin-bottom: var(--space-sm);
}

.nav-dropdown-parts .nav-mega-product-info h5 {
    font-size: 0.9rem;
    margin-bottom: 4px;
}

.nav-dropdown-parts .nav-mega-product-price {
    font-size: 1rem;
}

.header-actions {
    display: flex;
    align-items: center;
    gap: var(--space-sm);
}

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

.lang-btn {
    display: flex;
    align-items: center;
    gap: 4px;
    padding: 8px 12px;
    border-radius: var(--radius);
    background: transparent;
    border: 2px solid var(--accent-yellow);
    color: var(--accent-yellow);
    cursor: pointer;
    font-weight: 600;
    font-size: 0.85rem;
    transition: var(--transition);
}

.lang-btn:hover {
    background: var(--accent-yellow);
    color: var(--primary-bg);
}

.lang-current {
    font-size: 0.85rem;
}

.lang-arrow {
    width: 14px;
    height: 14px;
    transition: transform 0.3s ease;
}

.lang-dropdown:hover .lang-arrow {
    transform: rotate(180deg);
}

.lang-menu {
    position: absolute;
    top: 100%;
    right: 0;
    margin-top: 4px;
    background: var(--primary-bg);
    border: 1px solid var(--border-color);
    border-radius: var(--radius);
    padding: var(--space-xs);
    min-width: 120px;
    opacity: 0;
    visibility: hidden;
    transform: translateY(-10px);
    transition: all 0.3s ease;
    box-shadow: var(--shadow-lg);
    z-index: 1000;
}

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

.lang-option {
    display: flex;
    align-items: center;
    gap: 8px;
    padding: var(--space-xs) var(--space-sm);
    border-radius: var(--radius-sm);
    color: var(--text-primary);
    font-size: 0.85rem;
    transition: var(--transition);
}

.lang-option:hover {
    background: var(--secondary-bg);
}

.lang-option.active {
    background: var(--accent-yellow);
    color: var(--primary-bg);
}

.lang-flag {
    font-size: 1rem;
}

.lang-name {
    font-size: 0.85rem;
}

.search-btn {
    width: 40px;
    height: 40px;
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--text-secondary);
    border-radius: var(--radius);
    transition: var(--transition);
}

.search-btn:hover {
    background: var(--secondary-bg);
    color: var(--text-primary);
}

.search-btn svg {
    width: 20px;
    height: 20px;
}

.member-btn {
    width: 40px;
    height: 40px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: none;
    border: none;
    border-radius: var(--radius);
    cursor: pointer;
    transition: var(--transition);
}

.member-btn:hover {
    background: var(--secondary-bg);
}

.member-btn svg {
    width: 20px;
    height: 20px;
    stroke: var(--text-primary);
}

.cart-btn {
    position: relative;
    width: 36px;
    height: 36px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--accent-yellow);
    border-radius: var(--radius);
    transition: var(--transition);
}

.cart-btn:hover {
    background: var(--accent-yellow-dark);
    transform: scale(1.05);
}

.cart-icon {
    width: 20px;
    height: 20px;
    color: var(--text-primary);
}

.cart-badge {
    position: absolute;
    top: -4px;
    right: -4px;
    min-width: 18px;
    height: 18px;
    padding: 0 5px;
    background: var(--accent-dark);
    color: var(--accent-yellow);
    font-size: 0.7rem;
    font-weight: 700;
    border-radius: 9px;
    display: flex;
    align-items: center;
    justify-content: center;
    transform: scale(0);
    transition: transform 0.3s cubic-bezier(0.68, -0.55, 0.265, 1.55);
}

.cart-badge.show {
    transform: scale(1);
}

/* ========================================
   Mobile Menu Button
   ======================================== */
.mobile-menu-btn {
    display: none;
    flex-direction: column;
    gap: 4px;
    padding: 8px;
    background: var(--accent-yellow);
    border: 2px solid var(--accent-yellow);
    border-radius: var(--radius);
    cursor: pointer;
    z-index: 1001;
    position: relative;
    transition: var(--transition);
}

.mobile-menu-btn span {
    width: 20px;
    height: 2px;
    background: var(--primary-bg);
    transition: var(--transition);
    border-radius: 2px;
}

.mobile-menu-btn:hover {
    background: var(--accent-yellow-dark);
    border-color: var(--accent-yellow-dark);
}

.mobile-menu-btn.active span:nth-child(1) {
    transform: rotate(45deg) translate(6px, 6px);
}

.mobile-menu-btn.active span:nth-child(2) {
    opacity: 0;
}

.mobile-menu-btn.active span:nth-child(3) {
    transform: rotate(-45deg) translate(6px, -6px);
}

.mobile-menu {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: var(--primary-bg);
    transform: translateX(-100%);
    opacity: 0;
    visibility: hidden;
    transition: all 0.3s ease;
    z-index: 9998;
    display: flex;
    flex-direction: column;
}

.mobile-menu.open {
    transform: translateX(0);
    opacity: 1;
    visibility: visible;
}

.mobile-menu-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: var(--space-md) var(--space-lg);
    border-bottom: 1px solid var(--border-color);
    background: var(--secondary-bg);
}

.mobile-lang-switch {
    display: flex;
    gap: var(--space-xs);
}

.mobile-lang-btn {
    padding: 6px 12px;
    background: transparent;
    border: 1px solid var(--border-color);
    border-radius: var(--radius);
    font-size: 0.85rem;
    cursor: pointer;
    transition: var(--transition);
}

.mobile-lang-btn.active {
    background: var(--accent-yellow);
    border-color: var(--accent-yellow);
    color: var(--primary-bg);
}

.mobile-menu-close {
    width: 40px;
    height: 40px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: transparent;
    border: 2px solid var(--border-color);
    border-radius: var(--radius);
    cursor: pointer;
    color: var(--text-secondary);
    transition: var(--transition);
}

.mobile-menu-close:hover {
    background: var(--accent-yellow);
    border-color: var(--accent-yellow);
    color: var(--primary-bg);
}

.mobile-menu-close svg {
    width: 20px;
    height: 20px;
}

.mobile-nav {
    flex: 1;
    overflow-y: auto;
    padding: var(--space-md);
}

.mobile-nav-link {
    display: block;
    padding: var(--space-md) var(--space-lg);
    font-size: 1.1rem;
    font-weight: 600;
    color: var(--text-primary);
    border-radius: var(--radius);
    transition: var(--transition);
}

.mobile-nav-link:hover,
.mobile-nav-link.active {
    background: var(--accent-yellow);
    color: var(--primary-bg);
}

.mobile-nav-group {
    margin-bottom: var(--space-xs);
}

.mobile-nav-group > .mobile-nav-link {
    position: relative;
}

.mobile-nav-group > .mobile-nav-link::after {
    content: '+';
    position: absolute;
    right: var(--space-lg);
    font-size: 1.2rem;
    color: var(--text-muted);
}

.mobile-nav-group.open > .mobile-nav-link::after {
    content: '-';
}

.mobile-nav-submenu {
    display: none;
    padding-left: var(--space-lg);
    background: var(--secondary-bg);
    border-radius: var(--radius);
    margin-top: var(--space-xs);
}

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

.mobile-nav-sublink {
    display: block;
    padding: var(--space-sm) var(--space-md);
    font-size: 0.95rem;
    color: var(--text-secondary);
    border-radius: var(--radius-sm);
    transition: var(--transition);
}

.mobile-nav-sublink:hover {
    color: var(--accent-yellow);
    background: var(--border-light);
}

.mobile-menu-footer {
    padding: var(--space-md) var(--space-lg);
    border-top: 1px solid var(--border-color);
    background: var(--secondary-bg);
}

.mobile-menu-cart {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: var(--space-sm);
    padding: var(--space-md);
    background: var(--accent-yellow);
    color: var(--primary-bg);
    border-radius: var(--radius);
    font-weight: 600;
    transition: var(--transition);
}

.mobile-menu-cart:hover {
    background: var(--accent-yellow-dark);
}

.mobile-menu-cart svg {
    width: 24px;
    height: 24px;
}

.mobile-cart-badge {
    background: var(--primary-bg);
    color: var(--accent-yellow);
    padding: 2px 8px;
    border-radius: var(--radius-sm);
    font-size: 0.85rem;
}

.mobile-menu-member {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: var(--space-sm);
    padding: var(--space-md);
    background: var(--primary-bg);
    color: var(--text-primary);
    border: 1px solid var(--border-color);
    border-radius: var(--radius);
    font-weight: 600;
    transition: var(--transition);
}

.mobile-menu-member:hover {
    background: var(--secondary-bg);
}

.mobile-menu-member svg {
    width: 24px;
    height: 24px;
    stroke: var(--text-primary);
}

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

    .nav-dropdown {
        display: none;
    }

    .nav-dropdown-mega {
        display: none;
    }

    .nav-submenu {
        display: none;
    }

    .nav-mega-menu {
        display: none;
    }

    .mobile-menu-btn {
        display: flex;
    }
}