.navbar {
    background: rgba(255, 255, 255, 0.98);
    backdrop-filter: blur(20px);
    box-shadow: 0 1px 0 0 rgba(0, 0, 0, 0.05);
    position: sticky;
    top: 0;
    z-index: 1000;
    transition: var(--transition);
}

.navbar.scrolled {
    box-shadow: var(--shadow-lg);
}

.nav-container {
    max-width: 1440px;
    margin: 0 auto;
    padding: 0.875rem 2rem;
    display: flex;
    align-items: center;
    gap: 2.5rem;
}

.nav-left {
    flex-shrink: 0;
}

.logo {
    display: flex;
    align-items: center;
    gap: 0.625rem;
    font-family: var(--font-display);
    font-size: 1.875rem;
    font-weight: 800;
    color: var(--gray-900);
    letter-spacing: -0.02em;
}

.logo-icon {
    width: 48px;
    height: 48px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--gradient-1);
    border-radius: var(--radius-lg);
    color: var(--white);
    font-size: 1.375rem;
    box-shadow: 0 4px 14px 0 rgba(99, 102, 241, 0.35);
    transition: var(--transition);
}

.logo:hover .logo-icon {
    transform: rotate(-10deg) scale(1.05);
}

.logo .accent {
    background: var(--gradient-1);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.nav-center {
    flex: 1;
    max-width: 720px;
}

.search-container {
    display: flex;
    align-items: stretch;
    background: var(--gray-100);
    border-radius: var(--radius-xl);
    overflow: hidden;
    border: 2px solid transparent;
    transition: var(--transition);
}

.search-container:focus-within {
    border-color: var(--primary);
    background: var(--white);
    box-shadow: 0 0 0 4px var(--primary-100), var(--shadow-lg);
}

.category-select {
    padding: 0.875rem 1.25rem;
    border: none;
    background: rgba(0, 0, 0, 0.03);
    color: var(--gray-700);
    font-size: 0.9rem;
    font-weight: 500;
    cursor: pointer;
    min-width: 150px;
    border-right: 1px solid var(--gray-200);
}

.category-select:focus {
    outline: none;
}

.search-input {
    flex: 1;
    padding: 0.875rem 1.25rem;
    border: none;
    background: transparent;
    font-size: 0.95rem;
    color: var(--gray-800);
}

.search-input::placeholder {
    color: var(--gray-400);
}

.search-input:focus {
    outline: none;
}

.search-btn {
    padding: 0.875rem 1.5rem;
    background: var(--gradient-1);
    color: var(--white);
    font-size: 1.125rem;
    transition: var(--transition);
}

.search-btn:hover {
    opacity: 0.9;
}

.nav-right {
    flex-shrink: 0;
}

.nav-icons {
    display: flex;
    align-items: center;
    gap: 0.75rem;
}

.nav-icon-item {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 0.25rem;
    cursor: pointer;
    position: relative;
    padding: 0.5rem 0.75rem;
    border-radius: var(--radius-lg);
    transition: var(--transition);
}

.nav-icon-item:hover {
    background: var(--gray-100);
}

.nav-icon-item:hover i {
    color: var(--primary);
}

.nav-icon-item i {
    font-size: 1.375rem;
    color: var(--gray-600);
    transition: var(--transition);
}

.icon-label {
    font-size: 0.75rem;
    font-weight: 500;
    color: var(--gray-500);
    transition: var(--transition);
}

.nav-icon-item:hover .icon-label {
    color: var(--primary);
}

.cart-count,
.wishlist-count {
    position: absolute;
    top: 0;
    right: 0.25rem;
    width: 20px;
    height: 20px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--gradient-2);
    color: var(--white);
    font-size: 0.7rem;
    font-weight: 700;
    border-radius: var(--radius-full);
    box-shadow: 0 2px 8px rgba(244, 63, 94, 0.4);
    animation: pulse 2s infinite;
}

.mobile-menu-btn {
    display: none;
    font-size: 1.5rem;
    color: var(--gray-700);
    padding: 0.5rem;
    border-radius: var(--radius);
    transition: var(--transition);
}

.mobile-menu-btn:hover {
    background: var(--gray-100);
}

.category-nav {
    background: linear-gradient(135deg, var(--gray-800) 0%, var(--gray-900) 100%);
}

.category-nav-container {
    max-width: 1440px;
    margin: 0 auto;
    padding: 0 2rem;
    display: flex;
    align-items: center;
    gap: 0.25rem;
    overflow-x: auto;
    scrollbar-width: none;
}

.category-nav-container::-webkit-scrollbar {
    display: none;
}

.category-link {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    padding: 1rem 1.125rem;
    color: var(--gray-300);
    font-size: 0.9rem;
    font-weight: 500;
    white-space: nowrap;
    transition: var(--transition);
    position: relative;
    border-radius: var(--radius) var(--radius) 0 0;
}

.category-link::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    right: 0;
    height: 3px;
    background: var(--gradient-1);
    transform: scaleX(0);
    transition: transform 0.3s var(--ease-out-expo);
}

.category-link:hover {
    color: var(--white);
    background: rgba(255, 255, 255, 0.05);
}

.category-link:hover::after {
    transform: scaleX(1);
}

.category-link.active {
    color: var(--white);
    background: rgba(255, 255, 255, 0.1);
}

.category-link.active::after {
    transform: scaleX(1);
}

.category-link i {
    font-size: 1rem;
}

.seller-link {
    color: var(--warning);
}

.seller-link::after {
    background: var(--gradient-5);
}

.seller-link:hover {
    color: var(--white);
}

.mobile-menu {
    position: fixed;
    top: 0;
    left: -100%;
    width: 320px;
    height: 100vh;
    background: var(--white);
    z-index: 2000;
    transition: left 0.4s var(--ease-out-expo);
    overflow-y: auto;
    box-shadow: var(--shadow-2xl);
}

.mobile-menu.active {
    left: 0;
}

.mobile-menu-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 1.75rem 1.5rem;
    background: var(--gradient-1);
    color: var(--white);
}

.mobile-user-greeting {
    font-weight: 600;
    font-size: 1.125rem;
}

.mobile-menu-close {
    width: 36px;
    height: 36px;
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: var(--radius-full);
    background: rgba(255, 255, 255, 0.2);
    color: var(--white);
    font-size: 1.125rem;
    transition: var(--transition);
}

.mobile-menu-close:hover {
    background: rgba(255, 255, 255, 0.3);
}

.mobile-menu-content {
    padding: 1.5rem 0;
}

.mobile-menu-section {
    padding: 0 1.5rem;
    margin-bottom: 2rem;
}

.mobile-menu-section h3 {
    font-size: 0.8rem;
    font-weight: 700;
    color: var(--gray-400);
    text-transform: uppercase;
    letter-spacing: 1px;
    margin-bottom: 1rem;
    padding-bottom: 0.75rem;
    border-bottom: 1px solid var(--gray-100);
}

.mobile-menu-section a {
    display: flex;
    align-items: center;
    gap: 1rem;
    padding: 0.875rem 1rem;
    color: var(--gray-700);
    font-weight: 500;
    border-radius: var(--radius-lg);
    transition: var(--transition);
    margin-bottom: 0.25rem;
}

.mobile-menu-section a:hover {
    background: var(--primary-50);
    color: var(--primary);
}

.mobile-menu-section a i {
    width: 24px;
    text-align: center;
    font-size: 1.1rem;
    color: var(--gray-400);
    transition: var(--transition);
}

.mobile-menu-section a:hover i {
    color: var(--primary);
}

@media (max-width: 1200px) {
    .nav-container {
        gap: 1.5rem;
        padding: 0.875rem 1.5rem;
    }
}

@media (max-width: 1024px) {
    .nav-container {
        gap: 1rem;
    }
    
    .category-select {
        display: none;
    }
    
    .icon-label {
        display: none;
    }
    
    .nav-icon-item {
        padding: 0.5rem;
    }
}

@media (max-width: 768px) {
    .nav-center {
        position: absolute;
        top: 100%;
        left: 0;
        right: 0;
        padding: 0.75rem 1rem;
        background: var(--white);
        border-top: 1px solid var(--gray-100);
        box-shadow: var(--shadow-md);
    }
    
    .nav-container {
        padding: 0.75rem 1rem;
    }
    
    .logo {
        font-size: 1.5rem;
    }
    
    .logo-icon {
        width: 40px;
        height: 40px;
        font-size: 1.125rem;
    }
    
    .nav-icons {
        gap: 0.5rem;
    }
    
    .mobile-menu-btn {
        display: flex;
        align-items: center;
        justify-content: center;
    }
    
    .nav-icon-item:not(#cartBtn) {
        display: none;
    }
    
    #cartBtn {
        display: flex;
    }
    
    .category-nav {
        display: none;
    }
    
    .search-container {
        border-radius: var(--radius-lg);
    }
}