/* ==========================================
   Variables CSS pour les thèmes
   ========================================== */
:root {
    /* Thème clair (par défaut) */
    --bg-primary: #ffffff;
    --bg-secondary: #f8f9fa;
    --bg-tertiary: #e9ecef;
    --text-primary: #212529;
    --text-secondary: #6c757d;
    --text-inverse: #ffffff;
    --border-color: #dee2e6;
    --shadow: rgba(0, 0, 0, 0.1);
    --shadow-hover: rgba(0, 0, 0, 0.15);
    
    /* Couleurs d'accent */
    --primary: #007bff;
    --primary-hover: #0056b3;
    --secondary: #6c757d;
    --secondary-hover: #545b62;
    --success: #28a745;
    --danger: #dc3545;
    --warning: #ffc107;
    --info: #17a2b8;
    
    /* Transitions */
    --transition: all 0.3s ease;
}

[data-theme="dark"] {
    /* Thème sombre */
    --bg-primary: #1a1a1a;
    --bg-secondary: #2d2d2d;
    --bg-tertiary: #3a3a3a;
    --text-primary: #f8f9fa;
    --text-secondary: #adb5bd;
    --text-inverse: #212529;
    --border-color: #495057;
    --shadow: rgba(0, 0, 0, 0.3);
    --shadow-hover: rgba(0, 0, 0, 0.5);
    
    --primary: #0d6efd;
    --primary-hover: #0a58ca;
}

/* ==========================================
   Reset et styles de base
   ========================================== */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
    line-height: 1.6;
    color: var(--text-primary);
    background-color: var(--bg-primary);
    transition: var(--transition);
}

a {
    text-decoration: none;
    color: inherit;
    transition: var(--transition);
}

img {
    max-width: 100%;
    height: auto;
    display: block;
}

button {
    cursor: pointer;
    border: none;
    background: none;
    font-family: inherit;
    transition: var(--transition);
}

ul {
    list-style: none;
}

/* ==========================================
   Container
   ========================================== */
.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 20px;
}

/* ==========================================
   Header
   ========================================== */
.header {
    background-color: var(--bg-primary);
    border-bottom: 1px solid var(--border-color);
    position: sticky;
    top: 0;
    z-index: 1000;
    box-shadow: 0 2px 8px var(--shadow);
}

.header-content {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 1rem 0;
}

.logo h1 {
    font-size: 1.8rem;
    color: var(--primary);
    font-weight: 700;
}

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

.main-nav ul {
    display: flex;
    gap: 2rem;
}

.main-nav a {
    color: var(--text-primary);
    font-weight: 500;
    padding: 0.5rem 0;
    position: relative;
}

.main-nav a:hover,
.main-nav a.active {
    color: var(--primary);
}

.main-nav a::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    width: 0;
    height: 2px;
    background-color: var(--primary);
    transition: width 0.3s ease;
}

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

.header-actions {
    display: flex;
    gap: 1rem;
    align-items: center;
}

.icon-btn {
    width: 40px;
    height: 40px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    background-color: var(--bg-secondary);
    color: var(--text-primary);
}

.icon-btn:hover {
    background-color: var(--bg-tertiary);
    transform: scale(1.05);
}

.cart-btn {
    position: relative;
}

.cart-count {
    position: absolute;
    top: -5px;
    right: -5px;
    background-color: var(--danger);
    color: white;
    border-radius: 50%;
    width: 20px;
    height: 20px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 0.75rem;
    font-weight: 700;
}

/* ==========================================
   Hero Section
   ========================================== */
.hero {
    background: linear-gradient(135deg, var(--primary) 0%, #0056b3 100%);
    color: white;
    padding: 6rem 0;
    text-align: center;
}

.hero-content h2 {
    font-size: 3rem;
    margin-bottom: 1rem;
    font-weight: 700;
}

.hero-content p {
    font-size: 1.25rem;
    margin-bottom: 2rem;
    opacity: 0.9;
}

/* ==========================================
   Page Header
   ========================================== */
.page-header {
    background-color: var(--bg-secondary);
    padding: 3rem 0;
    text-align: center;
    border-bottom: 1px solid var(--border-color);
}

.page-header h1 {
    font-size: 2.5rem;
    margin-bottom: 0.5rem;
    color: var(--text-primary);
}

.page-header p {
    font-size: 1.1rem;
    color: var(--text-secondary);
}

/* ==========================================
   Sections
   ========================================== */
.categories,
.products {
    padding: 4rem 0;
}

.section-title {
    font-size: 2rem;
    text-align: center;
    margin-bottom: 3rem;
    color: var(--text-primary);
    font-weight: 700;
}

/* ==========================================
   Categories Grid
   ========================================== */
.categories-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 2rem;
}

.category-card {
    background-color: var(--bg-secondary);
    border-radius: 12px;
    padding: 2rem;
    text-align: center;
    transition: var(--transition);
    border: 2px solid transparent;
    box-shadow: 0 4px 6px var(--shadow);
}

.category-card:hover {
    transform: translateY(-5px);
    border-color: var(--primary);
    box-shadow: 0 8px 16px var(--shadow-hover);
}

.category-icon {
    font-size: 4rem;
    margin-bottom: 1rem;
}

.category-card h3 {
    font-size: 1.5rem;
    margin-bottom: 0.5rem;
    color: var(--text-primary);
}

.category-card p {
    color: var(--text-secondary);
}

/* ==========================================
   Products Grid
   ========================================== */
.products-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
    gap: 2rem;
}

.product-card {
    background-color: var(--bg-secondary);
    border-radius: 12px;
    overflow: hidden;
    transition: var(--transition);
    box-shadow: 0 4px 6px var(--shadow);
    border: 1px solid var(--border-color);
}

.product-card:hover {
    transform: translateY(-5px);
    box-shadow: 0 8px 16px var(--shadow-hover);
}

.product-image {
    width: 100%;
    height: 250px;
    background: linear-gradient(135deg, var(--bg-tertiary) 0%, var(--bg-secondary) 100%);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 5rem;
    border-bottom: 1px solid var(--border-color);
}

.product-info {
    padding: 1.5rem;
}

.product-name {
    font-size: 1.25rem;
    font-weight: 600;
    margin-bottom: 0.5rem;
    color: var(--text-primary);
}

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

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

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

.btn-add-cart {
    background-color: var(--primary);
    color: white;
    padding: 0.6rem 1.2rem;
    border-radius: 6px;
    font-weight: 600;
    font-size: 0.9rem;
}

.btn-add-cart:hover {
    background-color: var(--primary-hover);
    transform: scale(1.05);
}

/* ==========================================
   Buttons
   ========================================== */
.btn {
    padding: 0.75rem 1.5rem;
    border-radius: 6px;
    font-weight: 600;
    font-size: 1rem;
    display: inline-block;
    text-align: center;
    transition: var(--transition);
}

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

.btn-primary:hover {
    background-color: var(--primary-hover);
    transform: translateY(-2px);
    box-shadow: 0 4px 8px var(--shadow);
}

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

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

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

/* ==========================================
   Footer
   ========================================== */
.footer {
    background-color: var(--bg-secondary);
    border-top: 1px solid var(--border-color);
    padding: 3rem 0 1rem;
    margin-top: 4rem;
}

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

.footer-section h3,
.footer-section h4 {
    margin-bottom: 1rem;
    color: var(--text-primary);
}

.footer-section p {
    color: var(--text-secondary);
}

.footer-section ul li {
    margin-bottom: 0.5rem;
}

.footer-section a {
    color: var(--text-secondary);
}

.footer-section a:hover {
    color: var(--primary);
}

.footer-bottom {
    text-align: center;
    padding-top: 2rem;
    border-top: 1px solid var(--border-color);
    color: var(--text-secondary);
}

/* ==========================================
   Modal
   ========================================== */
.modal {
    display: none;
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background-color: rgba(0, 0, 0, 0.6);
    z-index: 2000;
    align-items: center;
    justify-content: center;
    backdrop-filter: blur(4px);
}

.modal.active {
    display: flex;
}

.modal-content {
    background-color: var(--bg-primary);
    border-radius: 12px;
    width: 90%;
    max-width: 600px;
    max-height: 90vh;
    overflow-y: auto;
    box-shadow: 0 10px 40px var(--shadow-hover);
    animation: modalSlideIn 0.3s ease;
}

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

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

.modal-header h2 {
    color: var(--text-primary);
}

.close-btn {
    font-size: 2rem;
    color: var(--text-secondary);
    width: 40px;
    height: 40px;
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: 50%;
}

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

.modal-body {
    padding: 1.5rem;
}

.modal-footer {
    padding: 1.5rem;
    border-top: 1px solid var(--border-color);
    display: flex;
    gap: 1rem;
    justify-content: flex-end;
}

/* ==========================================
   Cart Items
   ========================================== */
.cart-item {
    display: flex;
    gap: 1rem;
    padding: 1rem;
    background-color: var(--bg-secondary);
    border-radius: 8px;
    margin-bottom: 1rem;
    align-items: center;
}

.cart-item-icon {
    font-size: 3rem;
    width: 80px;
    height: 80px;
    background-color: var(--bg-tertiary);
    border-radius: 8px;
    display: flex;
    align-items: center;
    justify-content: center;
}

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

.cart-item-name {
    font-weight: 600;
    margin-bottom: 0.25rem;
    color: var(--text-primary);
}

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

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

.quantity-btn {
    width: 30px;
    height: 30px;
    border-radius: 50%;
    background-color: var(--bg-tertiary);
    color: var(--text-primary);
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: 700;
}

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

.cart-item-quantity {
    min-width: 30px;
    text-align: center;
    font-weight: 600;
    color: var(--text-primary);
}

.remove-btn {
    color: var(--danger);
    padding: 0.5rem;
    margin-left: 0.5rem;
}

.remove-btn:hover {
    background-color: var(--danger);
    color: white;
    border-radius: 4px;
}

.cart-total {
    margin-top: 1.5rem;
    padding-top: 1.5rem;
    border-top: 2px solid var(--border-color);
    text-align: right;
}

.cart-total h3 {
    color: var(--text-primary);
    font-size: 1.5rem;
}

.cart-total span {
    color: var(--primary);
}

.empty-cart {
    text-align: center;
    padding: 2rem;
    color: var(--text-secondary);
}

/* ==========================================
   Forms
   ========================================== */
.form-group {
    margin-bottom: 1.5rem;
}

.form-group label {
    display: block;
    margin-bottom: 0.5rem;
    font-weight: 600;
    color: var(--text-primary);
}

.form-group input,
.form-group textarea {
    width: 100%;
    padding: 0.75rem;
    border: 1px solid var(--border-color);
    border-radius: 6px;
    background-color: var(--bg-secondary);
    color: var(--text-primary);
    font-family: inherit;
    font-size: 1rem;
    transition: var(--transition);
}

.form-group input:focus,
.form-group textarea:focus {
    outline: none;
    border-color: var(--primary);
    box-shadow: 0 0 0 3px rgba(0, 123, 255, 0.1);
}

.form-row {
    display: grid;
    grid-template-columns: 2fr 1fr;
    gap: 1rem;
}

.checkout-total {
    background-color: var(--bg-secondary);
    padding: 1.5rem;
    border-radius: 8px;
    margin-bottom: 1.5rem;
    text-align: center;
}

.checkout-total h3 {
    color: var(--text-primary);
    font-size: 1.5rem;
}

.checkout-total span {
    color: var(--primary);
}

/* ==========================================
   Scroll to Top Button
   ========================================== */
.scroll-to-top {
    position: fixed;
    bottom: 30px;
    right: 30px;
    width: 50px;
    height: 50px;
    border-radius: 50%;
    background-color: var(--primary);
    color: white;
    display: none;
    align-items: center;
    justify-content: center;
    box-shadow: 0 4px 12px var(--shadow-hover);
    z-index: 1000;
    transition: var(--transition);
}

.scroll-to-top.visible {
    display: flex;
}

.scroll-to-top:hover {
    background-color: var(--primary-hover);
    transform: translateY(-5px);
}

/* ==========================================
   Responsive Design
   ========================================== */
@media (max-width: 768px) {
    .header-content {
        flex-direction: column;
        gap: 1rem;
    }
    
    .main-nav ul {
        flex-wrap: wrap;
        gap: 1rem;
        justify-content: center;
    }
    
    .hero-content h2 {
        font-size: 2rem;
    }
    
    .hero-content p {
        font-size: 1rem;
    }
    
    .categories-grid {
        grid-template-columns: 1fr;
    }
    
    .products-grid {
        grid-template-columns: 1fr;
    }
    
    .footer-content {
        grid-template-columns: 1fr;
    }
    
    .modal-content {
        width: 95%;
    }
    
    .form-row {
        grid-template-columns: 1fr;
    }
    
    .cart-item {
        flex-direction: column;
        text-align: center;
    }
}

/* ==========================================
   Animations et transitions
   ========================================== */
@keyframes fadeIn {
    from {
        opacity: 0;
    }
    to {
        opacity: 1;
    }
}

.fade-in {
    animation: fadeIn 0.5s ease;
}