* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

body {
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    line-height: 1.6;
    color: #333;
    background-color: #f8f9fa;
}

.header {
    background: linear-gradient(135deg, #1e3a8a 0%, #3b82f6 100%);
    box-shadow: 0 2px 10px rgba(0,0,0,0.1);
    position: sticky;
    top: 0;
    z-index: 100;
}

.navbar {
    padding: 1rem 0;
}

.nav-container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 2rem;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.nav-logo h1 {
    color: white;
    font-size: 2rem;
    font-weight: bold;
}

.nav-menu {
    display: flex;
    align-items: center;
    gap: 1rem;
}

.search-bar {
    padding: 0.75rem 1rem;
    border: none;
    border-radius: 25px;
    width: 300px;
    font-size: 1rem;
    outline: none;
    background: rgba(255,255,255,0.9);
}

.cart-btn {
    background: rgba(255,255,255,0.2);
    border: 2px solid white;
    color: white;
    padding: 0.75rem 1.25rem;
    border-radius: 25px;
    cursor: pointer;
    font-size: 1rem;
    position: relative;
    transition: all 0.3s ease;
}

.cart-btn:hover {
    background: white;
    color: #667eea;
    transform: translateY(-2px);
}

.cart-count {
    position: absolute;
    top: -8px;
    right: -8px;
    background: #ff4757;
    color: white;
    border-radius: 50%;
    width: 20px;
    height: 20px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 0.75rem;
    font-weight: bold;
}

.hero {
    background: linear-gradient(135deg, #1e3a8a 0%, #3b82f6 100%);
    color: white;
    padding: 4rem 2rem;
    text-align: center;
    margin-bottom: 2rem;
}

.hero-content h2 {
    font-size: 3rem;
    margin-bottom: 1rem;
    animation: fadeInUp 0.8s ease;
}

.hero-content p {
    font-size: 1.25rem;
    opacity: 0.9;
    animation: fadeInUp 0.8s ease 0.2s both;
}

@keyframes fadeInUp {
    from {
        opacity: 0;
        transform: translateY(30px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.filters {
    max-width: 1200px;
    margin: 0 auto 2rem;
    padding: 0 2rem;
}

.filter-container {
    display: flex;
    gap: 1rem;
    justify-content: center;
    flex-wrap: wrap;
}

.filter-select {
    padding: 0.75rem 1rem;
    border: 2px solid #e1e8ed;
    border-radius: 8px;
    font-size: 1rem;
    background: white;
    cursor: pointer;
    transition: all 0.3s ease;
    min-width: 150px;
}

.filter-select:hover {
    border-color: #3b82f6;
}

.filter-select:focus {
    outline: none;
    border-color: #3b82f6;
    box-shadow: 0 0 0 3px rgba(59, 130, 246, 0.1);
}

.products {
    max-width: 800px;
    margin: 0 auto;
    padding: 0 2rem 2rem;
    display: flex;
    flex-direction: column;
    gap: 1.5rem;
}

.product-card {
    background: white;
    border-radius: 12px;
    overflow: hidden;
    box-shadow: 0 4px 20px rgba(0,0,0,0.1);
    transition: all 0.3s ease;
    animation: fadeIn 0.6s ease;
    padding: 1.5rem;
}

.product-card:hover {
    transform: translateY(-5px);
    box-shadow: 0 8px 30px rgba(0,0,0,0.15);
}

@keyframes fadeIn {
    from {
        opacity: 0;
        transform: scale(0.9);
    }
    to {
        opacity: 1;
        transform: scale(1);
    }
}

.product-info {
    display: flex;
    flex-direction: column;
    justify-content: space-between;
}

.product-category {
    color: #3b82f6;
    font-size: 0.875rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 1px;
    margin-bottom: 0.5rem;
}

.product-name {
    font-size: 1.25rem;
    font-weight: 600;
    margin-bottom: 0.5rem;
    color: #2c3e50;
}

.product-footer {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-top: auto;
}

.product-price {
    font-size: 1.5rem;
    font-weight: bold;
    color: #27ae60;
}

.add-to-cart {
    background: linear-gradient(135deg, #059669 0%, #10b981 100%);
    color: white;
    border: none;
    padding: 0.75rem 1.5rem;
    border-radius: 8px;
    font-size: 1rem;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.3s ease;
    white-space: nowrap;
}

.add-to-cart:hover {
    transform: translateY(-2px);
    box-shadow: 0 4px 15px rgba(16, 185, 129, 0.3);
}

.add-to-cart:active {
    transform: translateY(0);
}

.admin-btn {
    background: rgba(255,255,255,0.2);
    border: 2px solid white;
    color: white;
    padding: 0.75rem 1rem;
    border-radius: 25px;
    cursor: pointer;
    font-size: 1rem;
    transition: all 0.3s ease;
}

.admin-btn:hover {
    background: white;
    color: #1e3a8a;
    transform: translateY(-2px);
}

.cart-modal {
    display: none;
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(0,0,0,0.5);
    z-index: 1000;
    animation: fadeIn 0.3s ease;
}

.cart-modal.active {
    display: flex;
    align-items: center;
    justify-content: center;
}

.cart-content {
    background: white;
    border-radius: 12px;
    width: 90%;
    max-width: 500px;
    max-height: 80vh;
    overflow: hidden;
    animation: slideIn 0.3s ease;
}

@keyframes slideIn {
    from {
        transform: translateY(-50px);
        opacity: 0;
    }
    to {
        transform: translateY(0);
        opacity: 1;
    }
}

.cart-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 1.5rem;
    border-bottom: 1px solid #e1e8ed;
}

.cart-header h3 {
    font-size: 1.5rem;
    color: #2c3e50;
}

.close-btn {
    background: none;
    border: none;
    font-size: 1.5rem;
    cursor: pointer;
    color: #6c757d;
    transition: color 0.3s ease;
}

.close-btn:hover {
    color: #ff4757;
}

.cart-items {
    padding: 1.5rem;
    max-height: 400px;
    overflow-y: auto;
}

.cart-item {
    display: flex;
    align-items: center;
    padding: 1rem;
    border-bottom: 1px solid #f8f9fa;
    animation: fadeIn 0.3s ease;
}

.cart-item-image {
    width: 60px;
    height: 60px;
    object-fit: cover;
    border-radius: 8px;
    margin-right: 1rem;
}

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

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

.cart-item-price {
    color: #27ae60;
    font-weight: bold;
}

.cart-item-quantity {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    margin-top: 0.5rem;
}

.quantity-btn {
    background: #f8f9fa;
    border: 1px solid #e1e8ed;
    width: 24px;
    height: 24px;
    border-radius: 4px;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: all 0.3s ease;
}

.quantity-btn:hover {
    background: #e1e8ed;
}

.remove-item {
    background: #ff4757;
    color: white;
    border: none;
    padding: 0.5rem;
    border-radius: 4px;
    cursor: pointer;
    font-size: 0.875rem;
    transition: all 0.3s ease;
}

.remove-item:hover {
    background: #ff3838;
}

.cart-footer {
    padding: 1.5rem;
    border-top: 1px solid #e1e8ed;
}

.cart-total {
    text-align: center;
    margin-bottom: 1rem;
    font-size: 1.25rem;
}

.checkout-btn {
    width: 100%;
    background: linear-gradient(135deg, #27ae60 0%, #2ecc71 100%);
    color: white;
    border: none;
    padding: 1rem;
    border-radius: 8px;
    font-size: 1rem;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.3s ease;
}

.checkout-btn:hover {
    transform: translateY(-2px);
    box-shadow: 0 4px 15px rgba(39, 174, 96, 0.3);
}

.empty-cart {
    text-align: center;
    padding: 3rem;
    color: #6c757d;
}

.empty-cart i {
    font-size: 3rem;
    margin-bottom: 1rem;
    opacity: 0.5;
}

.footer {
    background: #2c3e50;
    color: white;
    text-align: center;
    padding: 2rem;
    margin-top: 4rem;
}

/* Payment Modal Styles */
.payment-modal {
    display: none;
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(0,0,0,0.5);
    z-index: 1000;
    animation: fadeIn 0.3s ease;
}

.payment-modal.active {
    display: flex;
    align-items: center;
    justify-content: center;
}

.payment-content {
    background: white;
    border-radius: 12px;
    width: 90%;
    max-width: 600px;
    max-height: 90vh;
    overflow-y: auto;
    animation: slideIn 0.3s ease;
}

.payment-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 1.5rem;
    border-bottom: 1px solid #e1e8ed;
}

.payment-header h3 {
    font-size: 1.5rem;
    color: #2c3e50;
}

.customer-info {
    padding: 1.5rem;
}

.form-row {
    display: flex;
    gap: 1rem;
    margin-bottom: 1rem;
}

.form-group {
    flex: 1;
}

.form-group label {
    display: block;
    margin-bottom: 0.5rem;
    font-weight: 600;
    color: #2c3e50;
}

.form-group input {
    width: 100%;
    padding: 0.75rem;
    border: 2px solid #e1e8ed;
    border-radius: 8px;
    font-size: 1rem;
    transition: border-color 0.3s ease;
}

.form-group input:focus {
    outline: none;
    border-color: #3498db;
}

.payment-section {
    padding: 1.5rem;
    border-top: 1px solid #f8f9fa;
}

.payment-section h4 {
    margin-bottom: 1rem;
    color: #2c3e50;
}

#card-element {
    padding: 0.75rem;
    border: 2px solid #e1e8ed;
    border-radius: 8px;
    background: white;
}

#card-errors {
    color: #e74c3c;
    margin-top: 0.5rem;
    font-size: 0.875rem;
}

.order-summary {
    padding: 1.5rem;
    border-top: 1px solid #f8f9fa;
    background: #f8f9fa;
}

.order-summary h4 {
    margin: 0 0 0.5rem 0;
    font-size: 1rem;
    color: #2c3e50;
}

.order-total {
    text-align: right;
    font-size: 1.25rem;
    margin-top: 1rem;
    padding-top: 1rem;
    border-top: 2px solid #e1e8ed;
}

.pay-btn {
    width: 100%;
    background: linear-gradient(135deg, #27ae60 0%, #2ecc71 100%);
    color: white;
    border: none;
    padding: 1rem;
    border-radius: 8px;
    font-size: 1rem;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.3s ease;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 0.5rem;
}

.pay-btn:hover:not(:disabled) {
    transform: translateY(-2px);
    box-shadow: 0 4px 15px rgba(39, 174, 96, 0.3);
}

.pay-btn:disabled {
    opacity: 0.7;
    cursor: not-allowed;
}

.spinner {
    width: 20px;
    height: 20px;
    border: 2px solid white;
    border-top: 2px solid transparent;
    border-radius: 50%;
    animation: spin 1s linear infinite;
}

@keyframes spin {
    0% { transform: rotate(0deg); }
    100% { transform: rotate(360deg); }
}

/* Admin Dashboard Styles */
.admin-modal {
    display: none;
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(0,0,0,0.5);
    z-index: 1000;
    animation: fadeIn 0.3s ease;
}

.admin-modal.active {
    display: flex;
    align-items: center;
    justify-content: center;
}

.admin-content {
    background: white;
    border-radius: 12px;
    width: 90%;
    max-width: 900px;
    max-height: 90vh;
    overflow: hidden;
    animation: slideIn 0.3s ease;
}

.admin-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 1.5rem;
    border-bottom: 1px solid #e1e8ed;
    background: #1e3a8a;
    color: white;
}

.admin-header h3 {
    font-size: 1.5rem;
}

.admin-tabs {
    display: flex;
    background: #f8f9fa;
    border-bottom: 1px solid #e1e8ed;
}

.tab-btn {
    flex: 1;
    padding: 1rem;
    background: none;
    border: none;
    cursor: pointer;
    font-size: 1rem;
    font-weight: 600;
    color: #6c757d;
    transition: all 0.3s ease;
}

.tab-btn.active {
    background: white;
    color: #3b82f6;
    border-bottom: 3px solid #3b82f6;
}

.tab-btn:hover {
    background: #e1e8ed;
}

.admin-content-area {
    max-height: 60vh;
    overflow-y: auto;
}

.tab-content {
    display: none;
    padding: 1.5rem;
}

.tab-content.active {
    display: block;
}

.order-item {
    background: white;
    border: 1px solid #e1e8ed;
    border-radius: 8px;
    padding: 1rem;
    margin-bottom: 1rem;
}

.order-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 0.5rem;
}

.order-id {
    font-weight: bold;
    color: #3b82f6;
}

.order-status {
    padding: 0.25rem 0.75rem;
    border-radius: 12px;
    font-size: 0.875rem;
    font-weight: 600;
}

.status-pending {
    background: #fff3cd;
    color: #856404;
}

.status-paid {
    background: #d4edda;
    color: #155724;
}

.status-shipped {
    background: #cce5ff;
    color: #004085;
}

.order-details {
    margin-top: 0.5rem;
    color: #6c757d;
}

.inventory-item {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 1rem;
    border-bottom: 1px solid #f8f9fa;
}

.inventory-info {
    flex: 1;
}

.inventory-title {
    font-weight: 600;
    margin-bottom: 0.25rem;
}

.inventory-stock {
    color: #6c757d;
    font-size: 0.875rem;
}

.stock-badge {
    padding: 0.25rem 0.5rem;
    border-radius: 4px;
    font-size: 0.75rem;
    font-weight: 600;
}

.stock-low {
    background: #f8d7da;
    color: #721c24;
}

.stock-good {
    background: #d4edda;
    color: #155724;
}

.analytics-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 1rem;
    margin-bottom: 2rem;
}

.stat-card {
    background: linear-gradient(135deg, #3b82f6 0%, #1e3a8a 100%);
    color: white;
    padding: 1.5rem;
    border-radius: 8px;
    text-align: center;
}

.stat-value {
    font-size: 2rem;
    font-weight: bold;
    margin-bottom: 0.5rem;
}

.stat-label {
    opacity: 0.9;
}

/* Loading and Error States */
.loading {
    text-align: center;
    padding: 3rem;
    color: #6c757d;
    font-size: 1.2rem;
}

.loading::before {
    content: "";
    display: inline-block;
    width: 20px;
    height: 20px;
    border: 3px solid #f3f3f3;
    border-top: 3px solid #3b82f6;
    border-radius: 50%;
    animation: spin 1s linear infinite;
    margin-right: 10px;
}

@keyframes spin {
    0% { transform: rotate(0deg); }
    100% { transform: rotate(360deg); }
}

.error {
    text-align: center;
    padding: 3rem;
    color: #dc2626;
    font-size: 1.2rem;
    background: #fef2f2;
    border: 1px solid #fecaca;
    border-radius: 8px;
    margin: 1rem;
}

/* Responsive Design */
@media (max-width: 768px) {
    .nav-container {
        flex-direction: column;
        gap: 1rem;
    }
    
    .search-bar {
        width: 250px;
    }
    
    .hero-content h2 {
        font-size: 2rem;
    }
    
    .products {
        grid-template-columns: repeat(auto-fill, minmax(250px, 1fr));
        gap: 1.5rem;
    }
    
    .filter-container {
        flex-direction: column;
        align-items: center;
    }
    
    .filter-select {
        width: 100%;
        max-width: 300px;
    }
    
    .search-bar {
        width: 250px;
    }
    
    .products {
        padding: 0 1rem 2rem;
    }
    
    .product-card {
        flex-direction: column;
        text-align: center;
        min-height: auto;
    }
    
    .product-image {
        width: 100%;
        height: 200px;
    }
    
    .product-info {
        padding: 1rem;
    }
    
    .product-footer {
        flex-direction: column;
        gap: 1rem;
    }
    
    .add-to-cart {
        width: 100%;
    }
    
    .cart-modal-content {
        margin: 1rem;
        max-width: 95%;
    }
    
    .hero-content h2 {
        font-size: 2rem;
    }
    
    .filter-container {
        flex-direction: column;
        gap: 0.5rem;
    }
    
    .filter-select {
        width: 100%;
    }
}

@media (max-width: 480px) {
    .nav-container {
        padding: 0 1rem;
    }
    
    .products {
        padding: 0 1rem 1rem;
        grid-template-columns: 1fr;
    }
    
    .hero {
        padding: 2rem 1rem;
    }
    
    .cart-content {
        width: 95%;
        margin: 1rem;
    }
}