/* CSS Reset and Variables */
*, *::before, *::after {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
}

:root {
    --primary: #ff6b35;
    --primary-dark: #e55a28;
    --secondary: #4ecdc4;
    --accent: #ffe66d;
    --dark: #2c3e50;
    --light: #f8f9fa;
    --gray: #6c757d;
    --gray-light: #e9ecef;
    --success: #28a745;
    --danger: #dc3545;
    --white: #ffffff;
    --shadow: 0 2px 8px rgba(0,0,0,0.1);
    --shadow-lg: 0 4px 16px rgba(0,0,0,0.15);
    --radius: 12px;
    --radius-sm: 8px;
    --transition: all 0.2s ease;
}

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen, Ubuntu, sans-serif;
    background: linear-gradient(135deg, #f5f7fa 0%, #c3cfe2 100%);
    min-height: 100vh;
    color: var(--dark);
    line-height: 1.6;
}

/* Header */
.header {
    background: var(--white);
    box-shadow: var(--shadow);
    position: sticky;
    top: 0;
    z-index: 100;
}

.header-content {
    max-width: 1400px;
    margin: 0 auto;
    padding: 1rem 2rem;
    display: flex;
    align-items: center;
    gap: 2rem;
}

.logo {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    text-decoration: none;
    color: var(--dark);
    font-weight: 700;
    font-size: 1.5rem;
}

.logo-icon {
    font-size: 2rem;
}

.logo:hover {
    color: var(--primary);
}

/* Search Bar */
.search-bar {
    flex: 1;
    max-width: 500px;
    display: flex;
    gap: 0;
    background: var(--light);
    border-radius: var(--radius);
    overflow: hidden;
    border: 2px solid transparent;
    transition: var(--transition);
}

.search-bar:focus-within {
    border-color: var(--primary);
}

.search-bar input {
    flex: 1;
    padding: 0.75rem 1rem;
    border: none;
    background: transparent;
    font-size: 1rem;
    outline: none;
}

.search-btn {
    padding: 0.75rem 1.25rem;
    background: var(--primary);
    border: none;
    color: var(--white);
    cursor: pointer;
    font-size: 1rem;
    transition: var(--transition);
}

.search-btn:hover {
    background: var(--primary-dark);
}

/* Navigation */
.nav-actions {
    display: flex;
    align-items: center;
    gap: 1rem;
}

.nav-btn {
    display: flex;
    flex-direction: column;
    align-items: center;
    text-decoration: none;
    color: var(--gray);
    padding: 0.5rem;
    border-radius: var(--radius-sm);
    transition: var(--transition);
    position: relative;
}

.nav-btn:hover {
    color: var(--primary);
    background: var(--light);
}

.nav-icon {
    font-size: 1.5rem;
}

.nav-label {
    font-size: 0.75rem;
    font-weight: 500;
}

.cart-badge {
    position: absolute;
    top: 0;
    right: 0;
    background: var(--danger);
    color: var(--white);
    font-size: 0.65rem;
    font-weight: 700;
    padding: 0.15rem 0.4rem;
    border-radius: 10px;
    min-width: 18px;
    text-align: center;
}

/* Auth Section */
.auth-btn {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    padding: 0.5rem 1rem;
    background: var(--primary);
    color: var(--white);
    text-decoration: none;
    border-radius: var(--radius-sm);
    font-weight: 500;
    transition: var(--transition);
}

.auth-btn:hover {
    background: var(--primary-dark);
}

/* User Auth Section - Inline Layout */
#auth-section {
    display: flex;
    align-items: center;
    gap: 0.75rem;
}

.user-menu {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    padding: 0.25rem 0.5rem;
    border-radius: var(--radius-sm);
    transition: var(--transition);
}

.user-menu:hover {
    background: var(--light);
}

.user-avatar {
    width: 32px;
    height: 32px;
    border-radius: 50%;
    object-fit: cover;
    background: var(--gray-light);
}

.user-name {
    font-weight: 500;
    font-size: 0.875rem;
    color: var(--dark);
    max-width: 120px;
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
}

.logout-btn {
    padding: 0.4rem 0.75rem;
    background: none;
    border: 1px solid var(--gray-light);
    border-radius: var(--radius-sm);
    color: var(--gray);
    cursor: pointer;
    font-size: 0.75rem;
    transition: var(--transition);
    text-decoration: none;
    white-space: nowrap;
}

.logout-btn:hover {
    background: var(--danger);
    color: var(--white);
    border-color: var(--danger);
}

/* Main Content */
.main-content {
    max-width: 1400px;
    margin: 0 auto;
    padding: 2rem;
}

/* Auth Screen */
.auth-screen {
    display: flex;
    justify-content: center;
    align-items: center;
    min-height: 50vh;
}

.auth-card {
    background: var(--white);
    padding: 3rem;
    border-radius: var(--radius);
    box-shadow: var(--shadow-lg);
    text-align: center;
    max-width: 400px;
}

.auth-card h2 {
    margin-bottom: 0.5rem;
    color: var(--dark);
}

.auth-card p {
    color: var(--gray);
    margin-bottom: 2rem;
}

.google-btn {
    display: inline-flex;
    align-items: center;
    gap: 0.75rem;
    padding: 1rem 2rem;
    background: var(--white);
    border: 2px solid var(--gray-light);
    border-radius: var(--radius-sm);
    color: var(--dark);
    text-decoration: none;
    font-weight: 500;
    font-size: 1rem;
    transition: var(--transition);
}

.google-btn:hover {
    border-color: var(--primary);
    background: var(--light);
}

/* Shop Page Layout */
#shop-page {
    display: flex;
    gap: 2rem;
}

/* Filters Sidebar */
.filters-sidebar {
    width: 280px;
    flex-shrink: 0;
    background: var(--white);
    padding: 1.5rem;
    border-radius: var(--radius);
    box-shadow: var(--shadow);
    height: fit-content;
    position: sticky;
    top: 100px;
}

.filters-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 1.5rem;
    padding-bottom: 1rem;
    border-bottom: 1px solid var(--gray-light);
}

.filters-header h3 {
    font-size: 1.25rem;
    color: var(--dark);
}

.clear-filters-btn {
    background: none;
    border: none;
    color: var(--primary);
    cursor: pointer;
    font-size: 0.875rem;
    font-weight: 500;
}

.clear-filters-btn:hover {
    text-decoration: underline;
}

.filter-group {
    margin-bottom: 1.5rem;
}

.filter-group h4 {
    font-size: 0.875rem;
    color: var(--gray);
    text-transform: uppercase;
    letter-spacing: 0.5px;
    margin-bottom: 0.75rem;
}

.filter-options {
    display: flex;
    flex-direction: column;
    gap: 0.5rem;
}

.filter-option {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    cursor: pointer;
    padding: 0.5rem;
    border-radius: var(--radius-sm);
    transition: var(--transition);
}

.filter-option:hover {
    background: var(--light);
}

.filter-option input[type="checkbox"] {
    width: 18px;
    height: 18px;
    accent-color: var(--primary);
}

.filter-option label {
    cursor: pointer;
    flex: 1;
}

.price-range {
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.price-range input {
    width: 80px;
    padding: 0.5rem;
    border: 1px solid var(--gray-light);
    border-radius: var(--radius-sm);
    font-size: 0.875rem;
}

.price-range span {
    color: var(--gray);
}

#sort-select {
    width: 100%;
    padding: 0.75rem;
    border: 1px solid var(--gray-light);
    border-radius: var(--radius-sm);
    font-size: 0.875rem;
    background: var(--white);
    cursor: pointer;
}

/* Products Section */
.products-section {
    flex: 1;
}

.products-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 1.5rem;
}

.products-header h2 {
    font-size: 1.5rem;
    color: var(--dark);
}

.products-count {
    color: var(--gray);
    font-size: 0.875rem;
}

/* Products Grid */
.products-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(260px, 1fr));
    gap: 1.5rem;
}

/* Product Card */
.product-card {
    background: var(--white);
    border-radius: var(--radius);
    overflow: hidden;
    box-shadow: var(--shadow);
    transition: var(--transition);
    position: relative;
}

.product-card:hover {
    transform: translateY(-4px);
    box-shadow: var(--shadow-lg);
}

.product-image {
    height: 180px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: linear-gradient(135deg, #f8f9fa 0%, #e9ecef 100%);
    font-size: 4rem;
}

.favorite-btn {
    position: absolute;
    top: 0.75rem;
    right: 0.75rem;
    width: 36px;
    height: 36px;
    border-radius: 50%;
    background: var(--white);
    border: none;
    cursor: pointer;
    font-size: 1.25rem;
    display: flex;
    align-items: center;
    justify-content: center;
    box-shadow: var(--shadow);
    transition: var(--transition);
}

.favorite-btn:hover {
    transform: scale(1.1);
}

.favorite-btn.active {
    background: var(--danger);
    color: var(--white);
}

.product-info {
    padding: 1rem;
}

.product-category {
    font-size: 0.75rem;
    color: var(--primary);
    text-transform: uppercase;
    letter-spacing: 0.5px;
    margin-bottom: 0.25rem;
}

.product-name {
    font-size: 1rem;
    font-weight: 600;
    color: var(--dark);
    margin-bottom: 0.5rem;
    display: -webkit-box;
    -webkit-line-clamp: 2;
    -webkit-box-orient: vertical;
    overflow: hidden;
}

.product-rating {
    display: flex;
    align-items: center;
    gap: 0.25rem;
    margin-bottom: 0.5rem;
    font-size: 0.875rem;
}

.stars {
    color: #ffc107;
}

.review-count {
    color: var(--gray);
}

.product-price {
    font-size: 1.25rem;
    font-weight: 700;
    color: var(--primary);
    margin-bottom: 0.75rem;
}

.add-to-cart-btn {
    width: 100%;
    padding: 0.75rem;
    background: var(--primary);
    color: var(--white);
    border: none;
    border-radius: var(--radius-sm);
    font-weight: 600;
    cursor: pointer;
    transition: var(--transition);
}

.add-to-cart-btn:hover {
    background: var(--primary-dark);
}

.add-to-cart-btn:disabled {
    background: var(--gray-light);
    color: var(--gray);
    cursor: not-allowed;
}

/* Loading Indicator */
.loading-indicator {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 1rem;
    padding: 2rem;
    color: var(--gray);
}

.spinner {
    width: 40px;
    height: 40px;
    border: 3px solid var(--gray-light);
    border-top-color: var(--primary);
    border-radius: 50%;
    animation: spin 1s linear infinite;
}

@keyframes spin {
    to { transform: rotate(360deg); }
}

/* Product Detail Page */
.product-detail {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 3rem;
    background: var(--white);
    padding: 2rem;
    border-radius: var(--radius);
    box-shadow: var(--shadow);
}

.product-detail-image {
    height: 400px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: linear-gradient(135deg, #f8f9fa 0%, #e9ecef 100%);
    border-radius: var(--radius);
    font-size: 8rem;
}

.product-detail-info h1 {
    font-size: 2rem;
    margin-bottom: 0.5rem;
    color: var(--dark);
}

.product-detail-category {
    color: var(--primary);
    font-weight: 500;
    margin-bottom: 1rem;
}

.product-detail-rating {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    margin-bottom: 1rem;
    font-size: 1.125rem;
}

.product-detail-price {
    font-size: 2.5rem;
    font-weight: 700;
    color: var(--primary);
    margin-bottom: 1.5rem;
}

.product-detail-description {
    color: var(--gray);
    line-height: 1.8;
    margin-bottom: 2rem;
}

.quantity-selector {
    display: flex;
    align-items: center;
    gap: 1rem;
    margin-bottom: 1.5rem;
}

.quantity-selector label {
    font-weight: 500;
}

.quantity-controls {
    display: flex;
    align-items: center;
    gap: 0;
    border: 1px solid var(--gray-light);
    border-radius: var(--radius-sm);
    overflow: hidden;
}

.quantity-btn {
    width: 40px;
    height: 40px;
    background: var(--light);
    border: none;
    font-size: 1.25rem;
    cursor: pointer;
    transition: var(--transition);
}

.quantity-btn:hover {
    background: var(--gray-light);
}

.quantity-value {
    width: 50px;
    text-align: center;
    font-weight: 600;
    font-size: 1.125rem;
}

.detail-actions {
    display: flex;
    gap: 1rem;
}

.detail-add-btn {
    flex: 1;
    padding: 1rem 2rem;
    background: var(--primary);
    color: var(--white);
    border: none;
    border-radius: var(--radius-sm);
    font-size: 1.125rem;
    font-weight: 600;
    cursor: pointer;
    transition: var(--transition);
}

.detail-add-btn:hover {
    background: var(--primary-dark);
}

.detail-favorite-btn {
    width: 54px;
    height: 54px;
    background: var(--white);
    border: 2px solid var(--gray-light);
    border-radius: var(--radius-sm);
    font-size: 1.5rem;
    cursor: pointer;
    transition: var(--transition);
}

.detail-favorite-btn:hover {
    border-color: var(--danger);
}

.detail-favorite-btn.active {
    background: var(--danger);
    border-color: var(--danger);
    color: var(--white);
}

.back-btn {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    margin-bottom: 1.5rem;
    color: var(--gray);
    text-decoration: none;
    font-weight: 500;
    cursor: pointer;
}

.back-btn:hover {
    color: var(--primary);
}

/* Cart Page */
.cart-container {
    background: var(--white);
    padding: 2rem;
    border-radius: var(--radius);
    box-shadow: var(--shadow);
}

.cart-container h2 {
    margin-bottom: 1.5rem;
    color: var(--dark);
}

.cart-item {
    display: flex;
    align-items: center;
    gap: 1.5rem;
    padding: 1.5rem 0;
    border-bottom: 1px solid var(--gray-light);
}

.cart-item:last-child {
    border-bottom: none;
}

.cart-item-image {
    width: 100px;
    height: 100px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--light);
    border-radius: var(--radius-sm);
    font-size: 2.5rem;
}

.cart-item-info {
    flex: 1;
}

.cart-item-name {
    font-weight: 600;
    margin-bottom: 0.25rem;
}

.cart-item-price {
    color: var(--primary);
    font-weight: 600;
}

.cart-item-quantity {
    display: flex;
    align-items: center;
    gap: 0;
    border: 1px solid var(--gray-light);
    border-radius: var(--radius-sm);
    overflow: hidden;
}

.cart-qty-btn {
    width: 36px;
    height: 36px;
    background: var(--light);
    border: none;
    font-size: 1rem;
    cursor: pointer;
}

.cart-qty-btn:hover {
    background: var(--gray-light);
}

.cart-qty-value {
    width: 40px;
    text-align: center;
    font-weight: 600;
}

.cart-item-subtotal {
    font-size: 1.125rem;
    font-weight: 700;
    color: var(--dark);
    min-width: 100px;
    text-align: right;
}

.cart-item-remove {
    background: none;
    border: none;
    color: var(--gray);
    cursor: pointer;
    font-size: 1.25rem;
    padding: 0.5rem;
}

.cart-item-remove:hover {
    color: var(--danger);
}

.cart-summary {
    margin-top: 2rem;
    padding-top: 2rem;
    border-top: 2px solid var(--gray-light);
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.cart-total {
    font-size: 1.5rem;
}

.cart-total span {
    font-weight: 700;
    color: var(--primary);
    font-size: 2rem;
}

.checkout-btn {
    padding: 1rem 3rem;
    background: var(--success);
    color: var(--white);
    border: none;
    border-radius: var(--radius-sm);
    font-size: 1.125rem;
    font-weight: 600;
    cursor: pointer;
    transition: var(--transition);
}

.checkout-btn:hover {
    background: #218838;
}

.empty-cart, .empty-favorites {
    text-align: center;
    padding: 3rem;
    color: var(--gray);
}

.empty-cart h3, .empty-favorites h3 {
    font-size: 1.25rem;
    margin-bottom: 0.5rem;
    color: var(--dark);
}

.empty-cart p, .empty-favorites p {
    margin-bottom: 1.5rem;
}

.shop-now-btn {
    display: inline-block;
    padding: 0.75rem 2rem;
    background: var(--primary);
    color: var(--white);
    text-decoration: none;
    border-radius: var(--radius-sm);
    font-weight: 500;
}

.shop-now-btn:hover {
    background: var(--primary-dark);
}

/* Favorites Page */
.favorites-container {
    background: var(--white);
    padding: 2rem;
    border-radius: var(--radius);
    box-shadow: var(--shadow);
}

.favorites-container h2 {
    margin-bottom: 1.5rem;
    color: var(--dark);
}

/* Toast Notifications */
.toast-container {
    position: fixed;
    bottom: 2rem;
    right: 2rem;
    z-index: 1000;
    display: flex;
    flex-direction: column;
    gap: 0.75rem;
}

.toast {
    padding: 1rem 1.5rem;
    background: var(--dark);
    color: var(--white);
    border-radius: var(--radius-sm);
    box-shadow: var(--shadow-lg);
    animation: slideIn 0.3s ease;
    display: flex;
    align-items: center;
    gap: 0.75rem;
}

.toast.success {
    background: var(--success);
}

.toast.error {
    background: var(--danger);
}

@keyframes slideIn {
    from {
        transform: translateX(100%);
        opacity: 0;
    }
    to {
        transform: translateX(0);
        opacity: 1;
    }
}

/* Responsive */
@media (max-width: 1024px) {
    .filters-sidebar {
        display: none;
    }
    
    #shop-page {
        flex-direction: column;
    }
    
    .product-detail {
        grid-template-columns: 1fr;
    }
}

@media (max-width: 768px) {
    .header-content {
        flex-wrap: wrap;
        gap: 1rem;
        padding: 1rem;
    }
    
    .search-bar {
        order: 3;
        max-width: 100%;
        width: 100%;
    }
    
    .nav-label {
        display: none;
    }
    
    .main-content {
        padding: 1rem;
    }
    
    .products-grid {
        grid-template-columns: repeat(auto-fill, minmax(160px, 1fr));
        gap: 1rem;
    }
    
    .product-image {
        height: 140px;
        font-size: 3rem;
    }
    
    .cart-item {
        flex-wrap: wrap;
    }
    
    .cart-item-subtotal {
        width: 100%;
        text-align: left;
        margin-top: 0.5rem;
    }
}