/* Reset & Base Styles */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

:root {
    --primary-color: #c41e3a;
    --primary-dark: #9a1629;
    --secondary-color: #2c3e50;
    --accent-color: #e74c3c;
    --success-color: #27ae60;
    --warning-color: #f39c12;
    --danger-color: #e74c3c;
    --dark-color: #1a1a1a;
    --light-color: #f8f9fa;
    --border-color: #dee2e6;
    --text-color: #333;
    --text-light: #666;
    --shadow: 0 2px 10px rgba(0, 0, 0, 0.1);
    --shadow-lg: 0 5px 20px rgba(0, 0, 0, 0.15);
    --transition: all 0.3s ease;
}

body {
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    line-height: 1.6;
    color: var(--text-color);
    background-color: var(--light-color);
    min-height: 100vh;
    display: flex;
    flex-direction: column;
}

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 20px;
    width: 100%;
}

/* Login Page */
.login-page {
    display: flex;
    align-items: center;
    justify-content: center;
    min-height: 100vh;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    padding: 20px;
}

.login-container {
    width: 100%;
    max-width: 450px;
}

.login-box {
    background: white;
    border-radius: 15px;
    padding: 40px;
    box-shadow: var(--shadow-lg);
    animation: slideUp 0.5s ease;
}

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

.login-header {
    text-align: center;
    margin-bottom: 30px;
}

.login-header h1 {
    font-size: 2rem;
    color: var(--primary-color);
    margin-bottom: 10px;
}

.login-header p {
    color: var(--text-light);
}

.login-form {
    margin-top: 20px;
}

.form-group {
    margin-bottom: 20px;
}

.form-group label {
    display: block;
    margin-bottom: 8px;
    font-weight: 600;
    color: var(--text-color);
}

.form-group input,
.form-group textarea,
.form-group select {
    width: 100%;
    padding: 12px 15px;
    border: 2px solid var(--border-color);
    border-radius: 8px;
    font-size: 1rem;
    transition: var(--transition);
    font-family: inherit;
}

.form-group input:focus,
.form-group textarea:focus,
.form-group select:focus {
    outline: none;
    border-color: var(--primary-color);
    box-shadow: 0 0 0 3px rgba(196, 30, 58, 0.1);
}

.form-group small {
    display: block;
    margin-top: 5px;
    color: var(--text-light);
    font-size: 0.875rem;
}

.login-footer {
    margin-top: 25px;
    padding-top: 20px;
    border-top: 1px solid var(--border-color);
    text-align: center;
    font-size: 0.875rem;
    color: var(--text-light);
}

.login-footer p {
    margin: 5px 0;
}

.login-footer a {
    text-decoration: none;
    transition: var(--transition);
}

.login-footer a:hover {
    text-decoration: underline;
}

.login-footer hr {
    margin: 15px 0;
    border: none;
    border-top: 1px solid var(--border-color);
}

/* Buttons */
.btn {
    display: inline-block;
    padding: 12px 24px;
    border: none;
    border-radius: 8px;
    font-size: 1rem;
    font-weight: 600;
    text-decoration: none;
    cursor: pointer;
    transition: var(--transition);
    text-align: center;
    font-family: inherit;
}

.btn-primary {
    background-color: var(--primary-color);
    color: white;
}

.btn-primary:hover {
    background-color: var(--primary-dark);
    transform: translateY(-2px);
    box-shadow: var(--shadow);
}

.btn-outline {
    background-color: transparent;
    color: var(--primary-color);
    border: 2px solid var(--primary-color);
}

.btn-outline:hover {
    background-color: var(--primary-color);
    color: white;
}

.btn-block {
    display: block;
    width: 100%;
}

.btn-large {
    padding: 15px 30px;
    font-size: 1.1rem;
}

.btn-sm {
    padding: 8px 16px;
    font-size: 0.875rem;
}

.btn-disabled {
    background-color: #ccc;
    color: #666;
    cursor: not-allowed;
}

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

.btn-danger:hover {
    background-color: #c0392b;
}

/* Navbar */
.navbar {
    background-color: white;
    box-shadow: var(--shadow);
    position: sticky;
    top: 0;
    z-index: 1000;
    padding: 15px 0;
}

.navbar .container {
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.nav-brand a {
    font-size: 1.5rem;
    font-weight: bold;
    color: var(--primary-color);
    text-decoration: none;
}

.nav-menu {
    display: flex;
    list-style: none;
    gap: 25px;
    align-items: center;
}

.nav-menu a {
    color: var(--text-color);
    text-decoration: none;
    font-weight: 500;
    transition: var(--transition);
    display: flex;
    align-items: center;
    gap: 8px;
}

.nav-menu a:hover {
    color: var(--primary-color);
}

.cart-count {
    background-color: var(--primary-color);
    color: white;
    border-radius: 50%;
    padding: 2px 8px;
    font-size: 0.75rem;
    margin-left: 5px;
}

.nav-toggle {
    display: none;
    flex-direction: column;
    cursor: pointer;
    gap: 5px;
}

.nav-toggle span {
    width: 25px;
    height: 3px;
    background-color: var(--text-color);
    border-radius: 3px;
    transition: var(--transition);
}

/* Main Content */
.main-content {
    flex: 1;
    padding: 40px 0;
}

.page-header {
    margin-bottom: 30px;
    display: flex;
    justify-content: space-between;
    align-items: center;
    flex-wrap: wrap;
    gap: 15px;
}

.page-header h1 {
    font-size: 2rem;
    color: var(--secondary-color);
}

.page-header .btn {
    white-space: nowrap;
}

/* Hero Section */
.hero {
    background: linear-gradient(135deg, var(--primary-color) 0%, var(--primary-dark) 100%);
    color: white;
    padding: 80px 0;
    text-align: center;
    margin-bottom: 50px;
}

.hero-content h1 {
    font-size: 3rem;
    margin-bottom: 20px;
    animation: fadeIn 1s ease;
}

.hero-content p {
    font-size: 1.25rem;
    margin-bottom: 30px;
    opacity: 0.9;
}

@keyframes fadeIn {
    from {
        opacity: 0;
    }
    to {
        opacity: 1;
    }
}

/* Sections */
.section-title {
    font-size: 2rem;
    color: var(--secondary-color);
    margin-bottom: 30px;
    text-align: center;
}

/* Categories Grid */
.categories-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 25px;
    margin-bottom: 50px;
}

.category-card {
    background: white;
    padding: 30px;
    border-radius: 12px;
    box-shadow: var(--shadow);
    text-align: center;
    transition: var(--transition);
}

.category-card:hover {
    transform: translateY(-5px);
    box-shadow: var(--shadow-lg);
}

.category-card h3 {
    color: var(--primary-color);
    margin-bottom: 10px;
    font-size: 1.5rem;
}

.category-card p {
    color: var(--text-light);
    margin-bottom: 20px;
}

/* Products Grid */
.products-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
    gap: 25px;
    margin-bottom: 40px;
}

.product-card {
    background: white;
    border-radius: 12px;
    overflow: hidden;
    box-shadow: var(--shadow);
    transition: var(--transition);
    display: flex;
    flex-direction: column;
}

.product-card:hover {
    transform: translateY(-5px);
    box-shadow: var(--shadow-lg);
}

.product-image {
    position: relative;
    background: linear-gradient(135deg, #f5f7fa 0%, #c3cfe2 100%);
    padding: 40px 20px;
    text-align: center;
    min-height: 200px;
    display: flex;
    align-items: center;
    justify-content: center;
    overflow: hidden;
}

.product-image img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    position: absolute;
    top: 0;
    left: 0;
    z-index: 1;
}

.product-placeholder {
    font-size: 4rem;
    color: var(--primary-color);
    opacity: 0.7;
}

.product-placeholder.large {
    font-size: 8rem;
    min-height: 400px;
}

.product-placeholder.small {
    font-size: 2rem;
}

.product-badge {
    position: absolute;
    top: 10px;
    right: 10px;
    background-color: var(--primary-color);
    color: white;
    padding: 5px 12px;
    border-radius: 20px;
    font-size: 0.75rem;
    font-weight: 600;
}

.product-info {
    padding: 20px;
    flex: 1;
    display: flex;
    flex-direction: column;
}

.product-info h3 {
    color: var(--secondary-color);
    margin-bottom: 10px;
    font-size: 1.25rem;
}

.product-description {
    color: var(--text-light);
    font-size: 0.9rem;
    margin-bottom: 15px;
    flex: 1;
}

.product-specs {
    display: flex;
    flex-wrap: wrap;
    gap: 15px;
    margin-bottom: 15px;
    font-size: 0.875rem;
    color: var(--text-light);
}

.product-specs span {
    display: flex;
    align-items: center;
    gap: 5px;
}

.product-footer {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 15px;
    padding-top: 15px;
    border-top: 1px solid var(--border-color);
}

.product-price {
    font-size: 1.5rem;
    font-weight: bold;
    color: var(--primary-color);
}

.product-stock {
    font-size: 0.875rem;
    padding: 5px 10px;
    border-radius: 5px;
}

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

.product-stock.out-of-stock {
    background-color: #f8d7da;
    color: #721c24;
}

.product-actions {
    display: flex;
    gap: 10px;
}

.product-actions .btn {
    flex: 1;
}

/* Product Detail */
.product-detail {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 40px;
    background: white;
    padding: 40px;
    border-radius: 12px;
    box-shadow: var(--shadow);
    margin-bottom: 40px;
}

.product-detail-image {
    text-align: center;
}

.product-category {
    display: inline-block;
    background-color: var(--primary-color);
    color: white;
    padding: 8px 16px;
    border-radius: 20px;
    font-size: 0.875rem;
    margin-bottom: 15px;
}

.product-detail-info h1 {
    font-size: 2rem;
    color: var(--secondary-color);
    margin-bottom: 20px;
}

.product-description-full {
    color: var(--text-light);
    line-height: 1.8;
    margin-bottom: 30px;
}

.product-specs-detail {
    margin-bottom: 30px;
}

.product-specs-detail h3 {
    margin-bottom: 15px;
    color: var(--secondary-color);
}

.specs-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 20px;
}

.spec-item {
    display: flex;
    align-items: center;
    gap: 15px;
    padding: 15px;
    background-color: var(--light-color);
    border-radius: 8px;
}

.spec-item i {
    font-size: 1.5rem;
    color: var(--primary-color);
}

.spec-item strong {
    display: block;
    margin-bottom: 5px;
}

.product-price-section {
    margin-bottom: 30px;
    padding: 20px;
    background-color: var(--light-color);
    border-radius: 8px;
}

.price-large {
    font-size: 2.5rem;
    font-weight: bold;
    color: var(--primary-color);
    margin-bottom: 10px;
}

.stock-available {
    color: var(--success-color);
    font-weight: 600;
}

.stock-unavailable {
    color: var(--danger-color);
    font-weight: 600;
}

.product-actions-detail {
    display: flex;
    flex-direction: column;
    gap: 15px;
}

/* Cart */
.cart-container {
    display: grid;
    grid-template-columns: 2fr 1fr;
    gap: 30px;
    margin-bottom: 40px;
}

.cart-table {
    width: 100%;
    background: white;
    border-radius: 12px;
    overflow: hidden;
    box-shadow: var(--shadow);
}

.cart-table thead {
    background-color: var(--secondary-color);
    color: white;
}

.cart-table th,
.cart-table td {
    padding: 15px;
    text-align: left;
}

.cart-table tbody tr {
    border-bottom: 1px solid var(--border-color);
}

.cart-table tbody tr:last-child {
    border-bottom: none;
}

.cart-product {
    display: flex;
    align-items: center;
    gap: 15px;
}

.quantity-form {
    display: flex;
    gap: 10px;
    align-items: center;
}

.quantity-input {
    width: 80px;
    padding: 8px;
    border: 2px solid var(--border-color);
    border-radius: 5px;
    text-align: center;
}

.cart-summary {
    background: white;
    padding: 25px;
    border-radius: 12px;
    box-shadow: var(--shadow);
    height: fit-content;
    position: sticky;
    top: 100px;
}

.cart-summary h3 {
    margin-bottom: 20px;
    color: var(--secondary-color);
}

.summary-item {
    display: flex;
    justify-content: space-between;
    margin-bottom: 15px;
    padding-bottom: 15px;
    border-bottom: 1px solid var(--border-color);
}

.summary-total {
    display: flex;
    justify-content: space-between;
    font-size: 1.25rem;
    font-weight: bold;
    color: var(--primary-color);
    margin-top: 20px;
    padding-top: 20px;
    border-top: 2px solid var(--border-color);
}

/* Checkout */
.checkout-container {
    display: grid;
    grid-template-columns: 2fr 1fr;
    gap: 30px;
}

.checkout-form-section,
.checkout-summary {
    background: white;
    padding: 30px;
    border-radius: 12px;
    box-shadow: var(--shadow);
}

.checkout-form-section h2,
.checkout-summary h2 {
    margin-bottom: 25px;
    color: var(--secondary-color);
}

.order-items {
    margin-bottom: 20px;
}

.order-item {
    display: flex;
    justify-content: space-between;
    padding: 15px 0;
    border-bottom: 1px solid var(--border-color);
}

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

.order-summary {
    margin-top: 20px;
    padding-top: 20px;
    border-top: 2px solid var(--border-color);
}

/* Orders */
.orders-list {
    display: flex;
    flex-direction: column;
    gap: 20px;
}

.order-card {
    background: white;
    padding: 25px;
    border-radius: 12px;
    box-shadow: var(--shadow);
    transition: var(--transition);
}

.order-card:hover {
    box-shadow: var(--shadow-lg);
}

.order-header {
    display: flex;
    justify-content: space-between;
    align-items: flex-start;
    margin-bottom: 15px;
    padding-bottom: 15px;
    border-bottom: 1px solid var(--border-color);
}

.order-date {
    color: var(--text-light);
    font-size: 0.875rem;
    margin-top: 5px;
}

.order-status {
    padding: 8px 16px;
    border-radius: 20px;
    font-size: 0.875rem;
    font-weight: 600;
}

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

.status-processing {
    background-color: #cfe2ff;
    color: #084298;
}

.status-shipped {
    background-color: #d1e7dd;
    color: #0f5132;
}

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

.status-cancelled {
    background-color: #f8d7da;
    color: #721c24;
}

.order-details {
    margin-bottom: 15px;
}

.order-details p {
    margin-bottom: 8px;
    color: var(--text-light);
}

.order-footer {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding-top: 15px;
    border-top: 1px solid var(--border-color);
}

.order-total {
    font-size: 1.25rem;
    color: var(--primary-color);
}

.order-detail-container {
    display: flex;
    flex-direction: column;
    gap: 30px;
}

.order-info-card,
.order-items-card {
    background: white;
    padding: 30px;
    border-radius: 12px;
    box-shadow: var(--shadow);
}

.order-info-card h2,
.order-items-card h2 {
    margin-bottom: 20px;
    color: var(--secondary-color);
}

.info-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 20px;
}

.info-grid > div {
    padding: 15px;
    background-color: var(--light-color);
    border-radius: 8px;
}

.info-grid strong {
    display: block;
    margin-bottom: 5px;
    color: var(--secondary-color);
}

.order-items-table {
    width: 100%;
    border-collapse: collapse;
}

.order-items-table th,
.order-items-table td {
    padding: 15px;
    text-align: left;
    border-bottom: 1px solid var(--border-color);
}

.order-items-table thead th {
    background-color: var(--secondary-color);
    color: white;
}

.order-items-table tfoot {
    font-weight: bold;
}

.order-items-table tfoot td {
    border-top: 2px solid var(--border-color);
    padding-top: 20px;
}

/* Profile */
.profile-container {
    display: flex;
    flex-direction: column;
    gap: 30px;
}

.profile-section {
    background: white;
    padding: 30px;
    border-radius: 12px;
    box-shadow: var(--shadow);
}

.profile-section h2 {
    margin-bottom: 25px;
    color: var(--secondary-color);
}

.profile-form {
    max-width: 600px;
}

/* Success Message */
.success-message {
    text-align: center;
    padding: 60px 20px;
    background: white;
    border-radius: 12px;
    box-shadow: var(--shadow);
}

.success-icon {
    font-size: 5rem;
    color: var(--success-color);
    margin-bottom: 20px;
}

.success-message h1 {
    color: var(--secondary-color);
    margin-bottom: 15px;
}

.order-number {
    font-size: 1.25rem;
    margin: 20px 0;
    color: var(--text-light);
}

.success-actions {
    display: flex;
    gap: 15px;
    justify-content: center;
    margin-top: 30px;
}

/* Filter */
.products-filter {
    background: white;
    padding: 25px;
    border-radius: 12px;
    box-shadow: var(--shadow);
    margin-bottom: 30px;
}

.filter-form {
    display: flex;
    gap: 15px;
    flex-wrap: wrap;
    align-items: flex-end;
}

.filter-group {
    flex: 1;
    min-width: 200px;
}

.filter-group input,
.filter-group select {
    width: 100%;
    padding: 12px 15px;
    border: 2px solid var(--border-color);
    border-radius: 8px;
    font-size: 1rem;
}

/* Alerts */
.alert {
    padding: 15px 20px;
    border-radius: 8px;
    margin-bottom: 20px;
    font-weight: 500;
}

.alert-success {
    background-color: #d4edda;
    color: #155724;
    border: 1px solid #c3e6cb;
}

.alert-error {
    background-color: #f8d7da;
    color: #721c24;
    border: 1px solid #f5c6cb;
}

.alert-warning {
    background-color: #fff3cd;
    color: #856404;
    border: 1px solid #ffeaa7;
}

.text-warning {
    color: var(--warning-color);
}

/* Empty State */
.empty-state {
    text-align: center;
    padding: 60px 20px;
    background: white;
    border-radius: 12px;
    box-shadow: var(--shadow);
}

.empty-state i {
    font-size: 4rem;
    color: var(--text-light);
    margin-bottom: 20px;
    opacity: 0.5;
}

.empty-state h3 {
    color: var(--secondary-color);
    margin-bottom: 10px;
}

.empty-state p {
    color: var(--text-light);
    margin-bottom: 25px;
}

/* Footer */
.footer {
    background-color: var(--secondary-color);
    color: white;
    padding: 40px 0 20px;
    margin-top: 50px;
}

.footer-content {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 30px;
    margin-bottom: 30px;
}

.footer-section h3,
.footer-section h4 {
    margin-bottom: 15px;
}

.footer-section ul {
    list-style: none;
}

.footer-section ul li {
    margin-bottom: 10px;
}

.footer-section a {
    color: rgba(255, 255, 255, 0.8);
    text-decoration: none;
    transition: var(--transition);
}

.footer-section a:hover {
    color: white;
}

.footer-section p {
    color: rgba(255, 255, 255, 0.8);
    margin-bottom: 10px;
}

.footer-bottom {
    text-align: center;
    padding-top: 20px;
    border-top: 1px solid rgba(255, 255, 255, 0.1);
    color: rgba(255, 255, 255, 0.6);
}

.text-center {
    text-align: center;
}

/* Responsive */
@media (max-width: 768px) {
    .nav-menu {
        position: fixed;
        left: -100%;
        top: 70px;
        flex-direction: column;
        background-color: white;
        width: 100%;
        text-align: center;
        transition: 0.3s;
        box-shadow: var(--shadow);
        padding: 20px 0;
    }

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

    .nav-toggle {
        display: flex;
    }

    .nav-toggle.active span:nth-child(1) {
        transform: rotate(45deg) translate(5px, 5px);
    }

    .nav-toggle.active span:nth-child(2) {
        opacity: 0;
    }

    .nav-toggle.active span:nth-child(3) {
        transform: rotate(-45deg) translate(7px, -6px);
    }

    .hero-content h1 {
        font-size: 2rem;
    }

    .product-detail {
        grid-template-columns: 1fr;
    }

    .cart-container,
    .checkout-container {
        grid-template-columns: 1fr;
    }

    .cart-summary {
        position: static;
    }

    .specs-grid {
        grid-template-columns: 1fr;
    }

    .products-grid {
        grid-template-columns: 1fr;
    }

    .categories-grid {
        grid-template-columns: 1fr;
    }

    .filter-form {
        flex-direction: column;
    }

    .filter-group {
        width: 100%;
    }

    .success-actions {
        flex-direction: column;
    }
}

/* Loading Spinner */
.loading {
    display: inline-block;
    width: 20px;
    height: 20px;
    border: 3px solid rgba(255, 255, 255, 0.3);
    border-radius: 50%;
    border-top-color: white;
    animation: spin 1s ease-in-out infinite;
}

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