/* Variables */
:root {
    /* Colors */
    --primary-color: #2563eb;
    --primary-dark: #1d4ed8;
    --primary-light: #60a5fa;
    --secondary-color: #10b981;
    --secondary-dark: #059669;
    --secondary-light: #34d399;
    --accent-color: #f59e0b;
    --accent-dark: #d97706;
    --accent-light: #fbbf24;
    --success-color: #22c55e;
    --error-color: #ef4444;
    --warning-color: #f59e0b;
    --info-color: #3b82f6;
    
    /* Text Colors */
    --text-primary: #1f2937;
    --text-secondary: #4b5563;
    --text-light: #9ca3af;
    --text-white: #ffffff;
    
    /* Background Colors */
    --bg-primary: #ffffff;
    --bg-secondary: #f3f4f6;
    --bg-dark: #1f2937;
    --bg-light: #f9fafb;
    
    /* Border Colors */
    --border-color: #e5e7eb;
    --border-dark: #d1d5db;
    
    /* Spacing */
    --spacing-xs: 0.25rem;
    --spacing-sm: 0.5rem;
    --spacing-md: 1rem;
    --spacing-lg: 1.5rem;
    --spacing-xl: 2rem;
    
    /* Border Radius */
    --radius-sm: 0.25rem;
    --radius-md: 0.5rem;
    --radius-lg: 1rem;
    --radius-full: 9999px;
    
    /* Shadows */
    --shadow-sm: 0 1px 2px 0 rgb(0 0 0 / 0.05);
    --shadow-md: 0 4px 6px -1px rgb(0 0 0 / 0.1);
    --shadow-lg: 0 10px 15px -3px rgb(0 0 0 / 0.1);
    
    /* Transitions */
    --transition-fast: 150ms ease;
    --transition-normal: 300ms ease;
    --transition-slow: 500ms ease;
}

/* Dark Theme */
.dark-theme {
    --primary-color: #60a5fa;
    --primary-dark: #3b82f6;
    --primary-light: #93c5fd;
    --text-primary: #f9fafb;
    --text-secondary: #e5e7eb;
    --text-light: #9ca3af;
    --bg-primary: #111827;
    --bg-secondary: #1f2937;
    --bg-dark: #374151;
    --bg-light: #1f2937;
    --border-color: #374151;
    --border-dark: #4b5563;
}

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

body {
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
    line-height: 1.5;
    color: var(--text-primary);
    background-color: var(--bg-primary);
    transition: background-color var(--transition-normal), color var(--transition-normal);
}

/* Theme Toggle */
.theme-toggle {
    position: fixed;
    bottom: var(--spacing-xl);
    right: var(--spacing-xl);
    width: 3rem;
    height: 3rem;
    border-radius: var(--radius-full);
    background-color: var(--primary-color);
    color: var(--text-white);
    display: flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    border: none;
    box-shadow: var(--shadow-lg);
    transition: transform var(--transition-fast);
    z-index: 1000;
}

.theme-toggle:hover {
    transform: scale(1.1);
}

.theme-toggle i {
    font-size: 1.25rem;
}

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

/* Header */
.site-header {
    background-color: var(--bg-primary);
    border-bottom: 1px solid var(--border-color);
    position: sticky;
    top: 0;
    z-index: 100;
    box-shadow: var(--shadow-sm);
}

.header-top {
    background-color: var(--bg-dark);
    color: var(--text-white);
    padding: var(--spacing-sm) 0;
    font-size: 0.875rem;
}

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

.contact-info {
    display: flex;
    gap: var(--spacing-lg);
    list-style: none;
}

.social-links {
    display: flex;
    gap: var(--spacing-md);
    list-style: none;
}

.header-main {
    padding: var(--spacing-md) 0;
}

.header-main .container {
    display: grid;
    grid-template-columns: auto 1fr auto;
    gap: var(--spacing-lg);
    align-items: center;
}

.logo a {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    text-decoration: none;
    color: var(--primary-color);
    font-size: 1.5rem;
    font-weight: bold;
}

.search-bar {
    max-width: 600px;
    width: 100%;
}

.search-bar form {
    display: flex;
    gap: var(--spacing-sm);
}

.search-bar input {
    flex: 1;
    padding: var(--spacing-sm) var(--spacing-md);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md);
    font-size: 1rem;
}

.search-bar button {
    padding: var(--spacing-sm) var(--spacing-md);
    background-color: var(--primary-color);
    color: var(--text-white);
    border: none;
    border-radius: var(--radius-md);
    cursor: pointer;
    transition: background-color var(--transition-fast);
}

.search-bar button:hover {
    background-color: var(--primary-dark);
}

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

.auth-buttons {
    display: flex;
    gap: var(--spacing-sm);
}

.header-action-link {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    text-decoration: none;
    color: var(--text-primary);
    font-weight: 500;
    padding: var(--spacing-sm);
    border-radius: var(--radius-md);
    transition: color var(--transition-fast);
}

.header-action-link:hover {
    color: var(--primary-color);
}

.cart-link {
    position: relative;
}

.cart-count {
    position: absolute;
    top: -8px;
    right: -8px;
    background-color: var(--accent-color);
    color: var(--text-white);
    font-size: 0.75rem;
    font-weight: bold;
    padding: 2px 6px;
    border-radius: var(--radius-full);
    min-width: 20px;
    text-align: center;
}

/* Navigation */
.header-nav {
    background-color: var(--bg-secondary);
    padding: var(--spacing-sm) 0;
}

.nav-menu {
    display: flex;
    gap: var(--spacing-lg);
    list-style: none;
}

.nav-menu a {
    color: var(--text-primary);
    text-decoration: none;
    font-weight: 500;
    padding: var(--spacing-sm);
    border-radius: var(--radius-md);
    transition: color var(--transition-fast);
}

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

/* Hero Section */
.hero {
    position: relative;
    height: 600px;
    background-size: cover;
    background-position: center;
    color: var(--text-white);
    display: flex;
    align-items: center;
    justify-content: center;
    text-align: center;
    overflow: hidden;
}

.hero-overlay {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: linear-gradient(rgba(0, 0, 0, 0.5), rgba(0, 0, 0, 0.7));
}

.hero-content {
    position: relative;
    z-index: 1;
    max-width: 800px;
    padding: var(--spacing-xl);
}

.hero-title {
    font-size: 3.5rem;
    font-weight: bold;
    margin-bottom: var(--spacing-md);
    animation: fadeInUp 1s ease;
}

.hero-subtitle {
    font-size: 1.5rem;
    margin-bottom: var(--spacing-lg);
    animation: fadeInUp 1s ease 0.2s;
    opacity: 0;
    animation-fill-mode: forwards;
}

.hero-buttons {
    display: flex;
    gap: var(--spacing-md);
    justify-content: center;
    animation: fadeInUp 1s ease 0.4s;
    opacity: 0;
    animation-fill-mode: forwards;
}

/* Categories */
.categories {
    padding: var(--spacing-xl) 0;
}

.category-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: var(--spacing-lg);
    padding: var(--spacing-md);
}

.category-card {
    position: relative;
    height: 300px;
    border-radius: var(--radius-lg);
    overflow: hidden;
    text-decoration: none;
    color: var(--text-white);
    background-size: cover;
    background-position: center;
    transition: transform var(--transition-fast);
}

.category-card:hover {
    transform: translateY(-5px);
}

.category-overlay {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: linear-gradient(rgba(0, 0, 0, 0.3), rgba(0, 0, 0, 0.7));
    transition: background var(--transition-fast);
}

.category-card:hover .category-overlay {
    background: linear-gradient(rgba(0, 0, 0, 0.5), rgba(0, 0, 0, 0.8));
}

.category-content {
    position: absolute;
    bottom: 0;
    left: 0;
    width: 100%;
    padding: var(--spacing-lg);
    text-align: center;
}

.category-icon {
    font-size: 2.5rem;
    margin-bottom: var(--spacing-sm);
}

.category-card h3 {
    font-size: 1.5rem;
    margin-bottom: var(--spacing-sm);
}

.category-count {
    font-size: 0.875rem;
    opacity: 0.8;
}

/* Products */
.product-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(250px, 1fr));
    gap: var(--spacing-lg);
    padding: var(--spacing-md);
}

.product-card {
    background-color: var(--bg-primary);
    border-radius: var(--radius-lg);
    overflow: hidden;
    box-shadow: var(--shadow-md);
    transition: transform var(--transition-fast);
}

.product-card:hover {
    transform: translateY(-5px);
}

.product-image {
    position: relative;
    aspect-ratio: 1;
    overflow: hidden;
}

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

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

.product-badge {
    position: absolute;
    top: var(--spacing-sm);
    left: var(--spacing-sm);
    padding: var(--spacing-xs) var(--spacing-sm);
    border-radius: var(--radius-full);
    font-size: 0.75rem;
    font-weight: bold;
    z-index: 1;
}

.product-badge.new {
    background-color: var(--success-color);
    color: var(--text-white);
}

.product-badge.low-stock {
    background-color: var(--warning-color);
    color: var(--text-white);
}

.product-actions {
    position: absolute;
    right: var(--spacing-sm);
    top: 50%;
    transform: translateY(-50%);
    display: flex;
    flex-direction: column;
    gap: var(--spacing-sm);
    opacity: 0;
    transition: opacity var(--transition-fast);
}

.product-card:hover .product-actions {
    opacity: 1;
}

.btn-icon {
    width: 2.5rem;
    height: 2.5rem;
    border-radius: var(--radius-full);
    background-color: var(--bg-primary);
    color: var(--text-primary);
    border: none;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: all var(--transition-fast);
}

.btn-icon:hover {
    background-color: var(--primary-color);
    color: var(--text-white);
    transform: scale(1.1);
}

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

.product-name {
    font-size: 1.125rem;
    margin-bottom: var(--spacing-sm);
    color: var(--text-primary);
}

.product-price {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    margin-bottom: var(--spacing-sm);
}

.old-price {
    color: var(--text-light);
    text-decoration: line-through;
    font-size: 0.875rem;
}

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

.product-rating {
    display: flex;
    align-items: center;
    gap: var(--spacing-xs);
    color: var(--accent-color);
}

.product-rating span {
    color: var(--text-light);
    font-size: 0.875rem;
}

/* Features */
.features {
    padding: var(--spacing-xl) 0;
    background-color: var(--bg-secondary);
}

.features-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: var(--spacing-lg);
    padding: var(--spacing-md);
}

.feature-card {
    text-align: center;
    padding: var(--spacing-lg);
    background-color: var(--bg-primary);
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-md);
    transition: transform var(--transition-fast);
}

.feature-card:hover {
    transform: translateY(-5px);
}

.feature-icon {
    font-size: 2.5rem;
    color: var(--primary-color);
    margin-bottom: var(--spacing-md);
}

.feature-card h3 {
    margin-bottom: var(--spacing-sm);
    color: var(--text-primary);
}

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

/* Newsletter */
.newsletter {
    padding: var(--spacing-xl) 0;
    background-color: var(--primary-color);
    color: var(--text-white);
}

.newsletter-content {
    text-align: center;
    max-width: 600px;
    margin: 0 auto;
    padding: var(--spacing-md);
}

.newsletter-form {
    margin-top: var(--spacing-lg);
}

.newsletter-form .form-group {
    display: flex;
    gap: var(--spacing-sm);
}

.newsletter-form input {
    flex: 1;
    padding: var(--spacing-md);
    border: none;
    border-radius: var(--radius-md);
    font-size: 1rem;
}

.newsletter-form button {
    padding: var(--spacing-md) var(--spacing-lg);
    background-color: var(--accent-color);
    color: var(--text-white);
    border: none;
    border-radius: var(--radius-md);
    font-weight: bold;
    cursor: pointer;
    transition: background-color var(--transition-fast);
}

.newsletter-form button:hover {
    background-color: var(--accent-dark);
}

/* Animations */
@keyframes fadeInUp {
    from {
        opacity: 0;
        transform: translateY(20px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

@keyframes scroll {
    from {
        transform: translateX(0);
    }
    to {
        transform: translateX(-50%);
    }
}

/* Responsive Design */
@media (max-width: 768px) {
    .hero-title {
        font-size: 2.5rem;
    }
    
    .hero-subtitle {
        font-size: 1.25rem;
    }
    
    .header-main .container {
        grid-template-columns: auto 1fr;
    }
    
    .search-bar {
        grid-column: 1 / -1;
        order: 3;
    }
    
    .nav-menu {
        flex-direction: column;
        position: fixed;
        top: 0;
        right: -100%;
        width: 80%;
        max-width: 300px;
        height: 100vh;
        background-color: var(--bg-primary);
        padding: var(--spacing-xl);
        transition: right var(--transition-normal);
    }
    
    .nav-menu.active {
        right: 0;
    }
    
    .menu-toggle {
        display: block;
    }
}

@media (max-width: 480px) {
    .hero-buttons {
        flex-direction: column;
    }
    
    .newsletter-form .form-group {
        flex-direction: column;
    }
    
    .feature-card {
        padding: var(--spacing-md);
    }
}