:root {
    /* Cores Principais */
    --primary-color: #FF6B35;
    --secondary-color: #F7931E;
    --accent-color: #C9184A;
    --success-color: #06D6A0;
    --warning-color: #FFD60A;
    --error-color: #EF476F;
    --info-color: #118AB2;
    
    /* Cores de Fundo */
    --bg-primary: #FFFFFF;
    --bg-secondary: #F8F9FA;
    --bg-tertiary: #E9ECEF;
    
    /* Cores de Texto */
    --text-primary: #212529;
    --text-secondary: #6C757D;
    --text-light: #ADB5BD;
    
    /* Bordas e Sombras */
    --border-color: #DEE2E6;
    --shadow-sm: 0 2px 4px rgba(0,0,0,0.08);
    --shadow-md: 0 4px 12px rgba(0,0,0,0.1);
    --shadow-lg: 0 8px 24px rgba(0,0,0,0.15);
    
    /* Espaçamentos */
    --spacing-xs: 0.25rem;
    --spacing-sm: 0.5rem;
    --spacing-md: 1rem;
    --spacing-lg: 1.5rem;
    --spacing-xl: 2rem;
    
    /* Border Radius */
    --radius-sm: 0.375rem;
    --radius-md: 0.5rem;
    --radius-lg: 1rem;
    --radius-xl: 1.5rem;
    
    /* Transições */
    --transition: all 0.3s ease;
}

/* Dark Theme */
[data-theme="dark"] {
    --bg-primary: #1A1A2E;
    --bg-secondary: #16213E;
    --bg-tertiary: #0F3460;
    --text-primary: #EAEAEA;
    --text-secondary: #B8B8B8;
    --text-light: #858585;
    --border-color: #2D3748;
    --shadow-sm: 0 2px 4px rgba(0,0,0,0.3);
    --shadow-md: 0 4px 12px rgba(0,0,0,0.4);
    --shadow-lg: 0 8px 24px rgba(0,0,0,0.5);
}

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

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

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 var(--spacing-md);
}

/* Header */
.header {
    background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
    color: white;
    padding: var(--spacing-lg) 0;
    position: sticky;
    top: 0;
    z-index: 100;
    box-shadow: var(--shadow-md);
}

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

.header h1 {
    font-size: 1.5rem;
    font-weight: 700;
}

.header-actions {
    display: flex;
    gap: var(--spacing-md);
}

.btn-icon {
    position: relative;
    background: rgba(255,255,255,0.2);
    border: none;
    color: white;
    width: 45px;
    height: 45px;
    border-radius: 50%;
    cursor: pointer;
    transition: var(--transition);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.2rem;
}

.btn-icon:hover {
    background: rgba(255,255,255,0.3);
    transform: scale(1.05);
}

.badge {
    position: absolute;
    top: -5px;
    right: -5px;
    background: var(--error-color);
    color: white;
    font-size: 0.75rem;
    font-weight: bold;
    padding: 2px 6px;
    border-radius: 10px;
    min-width: 20px;
    text-align: center;
}

/* Categorias */
.categories {
    background: var(--bg-primary);
    padding: var(--spacing-md) 0;
    border-bottom: 1px solid var(--border-color);
    position: sticky;
    top: 77px;
    z-index: 99;
}

.categories-scroll {
    display: flex;
    gap: var(--spacing-sm);
    overflow-x: auto;
    padding-bottom: var(--spacing-sm);
    scrollbar-width: thin;
}

.categories-scroll::-webkit-scrollbar {
    height: 4px;
}

.categories-scroll::-webkit-scrollbar-track {
    background: var(--bg-secondary);
}

.categories-scroll::-webkit-scrollbar-thumb {
    background: var(--primary-color);
    border-radius: 2px;
}

.category-btn {
    flex-shrink: 0;
    background: var(--bg-secondary);
    border: 2px solid var(--border-color);
    color: var(--text-primary);
    padding: var(--spacing-sm) var(--spacing-lg);
    border-radius: var(--radius-lg);
    cursor: pointer;
    transition: var(--transition);
    font-weight: 500;
    white-space: nowrap;
}

.category-btn:hover,
.category-btn.active {
    background: var(--primary-color);
    border-color: var(--primary-color);
    color: white;
}

/* Main Content */
.main-content {
    padding: var(--spacing-xl) 0;
    min-height: calc(100vh - 200px);
}

/* Search Box */
.search-box {
    position: relative;
    margin-bottom: var(--spacing-xl);
}

.search-box i {
    position: absolute;
    left: var(--spacing-md);
    top: 50%;
    transform: translateY(-50%);
    color: var(--text-secondary);
}

.search-box input {
    width: 100%;
    padding: var(--spacing-md) var(--spacing-md) var(--spacing-md) 45px;
    border: 2px solid var(--border-color);
    border-radius: var(--radius-lg);
    background: var(--bg-primary);
    color: var(--text-primary);
    font-size: 1rem;
    transition: var(--transition);
}

.search-box input:focus {
    outline: none;
    border-color: var(--primary-color);
    box-shadow: 0 0 0 3px rgba(255, 107, 53, 0.1);
}

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

.product-card {
    background: var(--bg-primary);
    border-radius: var(--radius-lg);
    overflow: hidden;
    box-shadow: var(--shadow-sm);
    transition: var(--transition);
    cursor: pointer;
}

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

.product-image {
    position: relative;
    width: 100%;
    height: 200px;
    overflow: hidden;
    background: var(--bg-tertiary);
}

.product-image img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: var(--transition);
}

.product-card:hover .product-image img {
    transform: scale(1.1);
}

.badge-discount,
.badge-featured {
    position: absolute;
    top: var(--spacing-sm);
    padding: var(--spacing-xs) var(--spacing-sm);
    border-radius: var(--radius-sm);
    font-size: 0.75rem;
    font-weight: bold;
    color: white;
}

.badge-discount {
    right: var(--spacing-sm);
    background: var(--error-color);
}

.badge-featured {
    left: var(--spacing-sm);
    background: var(--accent-color);
}

.product-info {
    padding: var(--spacing-md);
}

.product-info h3 {
    font-size: 1.1rem;
    margin-bottom: var(--spacing-sm);
    color: var(--text-primary);
}

.product-description {
    font-size: 0.9rem;
    color: var(--text-secondary);
    margin-bottom: var(--spacing-md);
    display: -webkit-box;
    -webkit-line-clamp: 2;
    -webkit-box-orient: vertical;
    overflow: hidden;
}

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

.product-price {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-xs);
}

.old-price {
    font-size: 0.85rem;
    color: var(--text-secondary);
    text-decoration: line-through;
}

.current-price {
    font-size: 1.25rem;
    font-weight: bold;
    color: var(--primary-color);
}

/* Buttons */
.btn {
    padding: var(--spacing-sm) var(--spacing-lg);
    border: none;
    border-radius: var(--radius-md);
    cursor: pointer;
    font-weight: 600;
    transition: var(--transition);
    display: inline-flex;
    align-items: center;
    gap: var(--spacing-sm);
    text-decoration: none;
}

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

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

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

.btn-add {
    background: var(--success-color);
    color: white;
    font-size: 0.9rem;
    padding: var(--spacing-sm) var(--spacing-md);
}

.btn-add:hover {
    background: #05b889;
}

.btn-block {
    width: 100%;
    justify-content: center;
}

.btn-close {
    background: transparent;
    border: none;
    color: var(--text-primary);
    font-size: 1.5rem;
    cursor: pointer;
    width: 35px;
    height: 35px;
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: 50%;
    transition: var(--transition);
}

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

/* Cart Sidebar */
.cart-sidebar {
    position: fixed;
    right: -400px;
    top: 0;
    width: 100%;
    max-width: 400px;
    height: 100vh;
    background: var(--bg-primary);
    box-shadow: var(--shadow-lg);
    transition: var(--transition);
    z-index: 1000;
    display: flex;
    flex-direction: column;
}

.cart-sidebar.active {
    right: 0;
}

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

.cart-header h2 {
    font-size: 1.3rem;
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
}

.cart-items {
    flex: 1;
    overflow-y: auto;
    padding: var(--spacing-md);
}

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

.empty-cart i {
    font-size: 4rem;
    margin-bottom: var(--spacing-md);
    opacity: 0.3;
}

.cart-item {
    display: flex;
    gap: var(--spacing-md);
    padding: var(--spacing-md);
    border-bottom: 1px solid var(--border-color);
}

.cart-item img {
    width: 60px;
    height: 60px;
    object-fit: cover;
    border-radius: var(--radius-sm);
}

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

.cart-item-info h4 {
    font-size: 0.95rem;
    margin-bottom: var(--spacing-xs);
}

.cart-item-price {
    color: var(--primary-color);
    font-weight: 600;
    font-size: 0.9rem;
}

.quantity-controls {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    margin-top: var(--spacing-sm);
}

.quantity-controls button {
    width: 28px;
    height: 28px;
    border: 1px solid var(--border-color);
    background: var(--bg-secondary);
    border-radius: var(--radius-sm);
    cursor: pointer;
    transition: var(--transition);
    display: flex;
    align-items: center;
    justify-content: center;
}

.quantity-controls button:hover {
    background: var(--primary-color);
    border-color: var(--primary-color);
    color: white;
}

.quantity-controls span {
    min-width: 30px;
    text-align: center;
    font-weight: 600;
}

.cart-item-actions {
    display: flex;
    flex-direction: column;
    align-items: flex-end;
    justify-content: space-between;
}

.cart-item-subtotal {
    font-weight: bold;
    color: var(--text-primary);
}

.btn-remove {
    background: transparent;
    border: none;
    color: var(--error-color);
    cursor: pointer;
    padding: var(--spacing-xs);
    transition: var(--transition);
    font-size: 1.1rem;
}

.btn-remove:hover {
    transform: scale(1.2);
}

.cart-footer {
    padding: var(--spacing-lg);
    border-top: 2px solid var(--border-color);
    background: var(--bg-secondary);
}

.cart-total {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: var(--spacing-md);
    font-size: 1.2rem;
}

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

/* Modal */
.modal {
    display: none;
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(0,0,0,0.7);
    z-index: 2000;
    align-items: center;
    justify-content: center;
    padding: var(--spacing-md);
}

.modal.active {
    display: flex;
}

.modal-content {
    background: var(--bg-primary);
    border-radius: var(--radius-lg);
    width: 100%;
    max-width: 500px;
    max-height: 90vh;
    overflow-y: auto;
    box-shadow: var(--shadow-lg);
}

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

.modal-body {
    padding: var(--spacing-lg);
}

/* Form */
.form-group {
    margin-bottom: var(--spacing-lg);
}

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

.form-group input,
.form-group select,
.form-group textarea {
    width: 100%;
    padding: var(--spacing-md);
    border: 2px solid var(--border-color);
    border-radius: var(--radius-md);
    background: var(--bg-primary);
    color: var(--text-primary);
    font-size: 1rem;
    transition: var(--transition);
}

.form-group input:focus,
.form-group select:focus,
.form-group textarea:focus {
    outline: none;
    border-color: var(--primary-color);
    box-shadow: 0 0 0 3px rgba(255, 107, 53, 0.1);
}

/* Floating Actions */
.floating-actions {
    position: fixed;
    right: var(--spacing-lg);
    bottom: var(--spacing-lg);
    display: flex;
    flex-direction: column;
    gap: var(--spacing-md);
    z-index: 900;
}

.fab {
    width: 56px;
    height: 56px;
    border-radius: 50%;
    background: var(--primary-color);
    color: white;
    border: none;
    cursor: pointer;
    box-shadow: var(--shadow-md);
    transition: var(--transition);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.3rem;
}

.fab:hover {
    background: var(--secondary-color);
    transform: scale(1.1);
    box-shadow: var(--shadow-lg);
}

/* Loading */
.loading {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(0,0,0,0.5);
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 9999;
}

.loading.hidden {
    display: none;
}

.spinner {
    width: 50px;
    height: 50px;
    border: 4px solid rgba(255,255,255,0.3);
    border-top-color: white;
    border-radius: 50%;
    animation: spin 1s linear infinite;
}

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

/* Notification */
.notification {
    position: fixed;
    bottom: -100px;
    left: 50%;
    transform: translateX(-50%);
    background: var(--bg-primary);
    padding: var(--spacing-md) var(--spacing-lg);
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-lg);
    z-index: 9999;
    transition: var(--transition);
    max-width: 90%;
}

.notification.show {
    bottom: var(--spacing-lg);
}

.notification-success {
    border-left: 4px solid var(--success-color);
}

.notification-error {
    border-left: 4px solid var(--error-color);
}

.notification-info {
    border-left: 4px solid var(--info-color);
}

/* Utilities */
.hidden {
    display: none !important;
}

.no-scroll {
    overflow: hidden;
}

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

/* Responsive */
@media (max-width: 768px) {
    .header h1 {
        font-size: 1.2rem;
    }
    
    .products-grid {
        grid-template-columns: repeat(auto-fill, minmax(150px, 1fr));
        gap: var(--spacing-md);
    }
    
    .cart-sidebar {
        max-width: 100%;
    }
    
    .floating-actions {
        right: var(--spacing-md);
        bottom: var(--spacing-md);
    }
    
    .fab {
        width: 48px;
        height: 48px;
        font-size: 1.1rem;
    }
}

@media (max-width: 480px) {
    .product-card {
        font-size: 0.9rem;
    }
    
    .product-image {
        height: 140px;
    }
}