/**
 * Modern Store Design
 * Advanced CSS with animations, gradients, and modern effects
 */

/* ==================== CSS Variables ==================== */
:root {
    /* Light Mode Colors */
    --bg-primary: #ffffff;
    --bg-secondary: #f8f9fa;
    --bg-card: #ffffff;
    --text-primary: #1a1a1a;
    --text-secondary: #6c757d;
    --text-muted: #9ca3af;
    --border-color: #e5e7eb;
    --shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, 0.05);
    --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.1), 0 2px 4px -1px rgba(0, 0, 0, 0.06);
    --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.1), 0 4px 6px -2px rgba(0, 0, 0, 0.05);
    --shadow-xl: 0 20px 25px -5px rgba(0, 0, 0, 0.1), 0 10px 10px -5px rgba(0, 0, 0, 0.04);
    --shadow-2xl: 0 25px 50px -12px rgba(0, 0, 0, 0.25);

    /* Theme Colors - Dynamic based on selected theme */
    --theme-primary: #667eea;
    --theme-secondary: #764ba2;
    --theme-gradient: linear-gradient(135deg, #667eea 0%, #764ba2 100%);

    /* Semantic Colors */
    --success: #10b981;
    --warning: #f59e0b;
    --danger: #ef4444;
    --info: #3b82f6;

    /* Spacing */
    --spacing-xs: 0.25rem;
    --spacing-sm: 0.5rem;
    --spacing-md: 1rem;
    --spacing-lg: 1.5rem;
    --spacing-xl: 2rem;
    --spacing-2xl: 3rem;

    /* Border Radius */
    --radius-sm: 0.375rem;
    --radius-md: 0.5rem;
    --radius-lg: 0.75rem;
    --radius-xl: 1rem;
    --radius-2xl: 1.5rem;
    --radius-full: 9999px;

    /* Transitions */
    --transition-fast: 150ms cubic-bezier(0.4, 0, 0.2, 1);
    --transition-base: 300ms cubic-bezier(0.4, 0, 0.2, 1);
    --transition-slow: 500ms cubic-bezier(0.4, 0, 0.2, 1);

    /* Z-index layers */
    --z-dropdown: 1000;
    --z-sticky: 1020;
    --z-fixed: 1030;
    --z-modal-backdrop: 1040;
    --z-modal: 1050;
    --z-popover: 1060;
    --z-tooltip: 1070;
}

/* Dark Mode Colors */
[data-theme="dark"] {
    --bg-primary: #0f172a;
    --bg-secondary: #1e293b;
    --bg-card: #1e293b;
    --text-primary: #f1f5f9;
    --text-secondary: #cbd5e1;
    --text-muted: #64748b;
    --border-color: #334155;
    --shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, 0.3);
    --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.4), 0 2px 4px -1px rgba(0, 0, 0, 0.3);
    --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.5), 0 4px 6px -2px rgba(0, 0, 0, 0.4);
    --shadow-xl: 0 20px 25px -5px rgba(0, 0, 0, 0.6), 0 10px 10px -5px rgba(0, 0, 0, 0.5);
    --shadow-2xl: 0 25px 50px -12px rgba(0, 0, 0, 0.7);
}

/* ==================== Theme Colors ==================== */
.theme-blue {
    --theme-primary: #667eea;
    --theme-secondary: #764ba2;
    --theme-gradient: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
}

.theme-purple {
    --theme-primary: #9d50bb;
    --theme-secondary: #6e48aa;
    --theme-gradient: linear-gradient(135deg, #9d50bb 0%, #6e48aa 100%);
}

.theme-green {
    --theme-primary: #11998e;
    --theme-secondary: #38ef7d;
    --theme-gradient: linear-gradient(135deg, #11998e 0%, #38ef7d 100%);
}

.theme-red {
    --theme-primary: #ee0979;
    --theme-secondary: #ff6a00;
    --theme-gradient: linear-gradient(135deg, #ee0979 0%, #ff6a00 100%);
}

.theme-orange {
    --theme-primary: #f46b45;
    --theme-secondary: #eea849;
    --theme-gradient: linear-gradient(135deg, #f46b45 0%, #eea849 100%);
}

.theme-teal {
    --theme-primary: #00d2ff;
    --theme-secondary: #3a7bd5;
    --theme-gradient: linear-gradient(135deg, #00d2ff 0%, #3a7bd5 100%);
}

.theme-indigo {
    --theme-primary: #4776e6;
    --theme-secondary: #8e54e9;
    --theme-gradient: linear-gradient(135deg, #4776e6 0%, #8e54e9 100%);
}

.theme-sunset {
    --theme-primary: #fa709a;
    --theme-secondary: #fee140;
    --theme-gradient: linear-gradient(135deg, #fa709a 0%, #fee140 100%);
}

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

body {
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
    background-color: var(--bg-primary);
    color: var(--text-primary);
    line-height: 1.6;
    transition: background-color var(--transition-base), color var(--transition-base);
    min-height: 100vh;
}

/* Smooth scrolling */
html {
    scroll-behavior: smooth;
}

/* Selection color */
::selection {
    background-color: var(--theme-primary);
    color: white;
}

/* ==================== Header & Navigation ==================== */
.store-header {
    background: var(--bg-card);
    border-bottom: 1px solid var(--border-color);
    box-shadow: var(--shadow-sm);
    position: sticky;
    top: 0;
    z-index: var(--z-sticky);
    backdrop-filter: blur(10px);
    transition: all var(--transition-base);
}

.store-header.scrolled {
    box-shadow: var(--shadow-md);
}

.header-content {
    max-width: 1400px;
    margin: 0 auto;
    padding: var(--spacing-lg) var(--spacing-xl);
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: var(--spacing-lg);
}

.store-logo {
    display: flex;
    align-items: center;
    gap: var(--spacing-md);
    text-decoration: none;
    transition: transform var(--transition-fast);
}

.store-logo:hover {
    transform: translateY(-2px);
}

.logo-image {
    height: 50px;
    width: auto;
    object-fit: contain;
    transition: transform var(--transition-base);
}

.store-logo:hover .logo-image {
    transform: scale(1.05);
}

.logo-text {
    font-size: 1.5rem;
    font-weight: 700;
    background: var(--theme-gradient);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

/* Theme Toggle Button */
.theme-toggle {
    background: var(--bg-secondary);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-full);
    padding: var(--spacing-sm) var(--spacing-md);
    cursor: pointer;
    transition: all var(--transition-fast);
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    font-size: 0.875rem;
    color: var(--text-primary);
}

.theme-toggle:hover {
    background: var(--theme-primary);
    color: white;
    border-color: var(--theme-primary);
    transform: translateY(-2px);
    box-shadow: var(--shadow-md);
}

/* ==================== Search Bar ==================== */
.search-section {
    background: var(--bg-secondary);
    padding: var(--spacing-2xl) var(--spacing-xl);
    border-bottom: 1px solid var(--border-color);
}

.search-container {
    max-width: 1400px;
    margin: 0 auto;
}

.search-form {
    display: flex;
    gap: var(--spacing-md);
    flex-wrap: wrap;
}

.search-input-wrapper {
    flex: 1;
    min-width: 300px;
    position: relative;
}

.search-input {
    width: 100%;
    padding: var(--spacing-md) var(--spacing-lg);
    padding-left: 3rem;
    border: 2px solid var(--border-color);
    border-radius: var(--radius-xl);
    background: var(--bg-card);
    color: var(--text-primary);
    font-size: 1rem;
    transition: all var(--transition-fast);
}

.search-input:focus {
    outline: none;
    border-color: var(--theme-primary);
    box-shadow: 0 0 0 3px rgba(102, 126, 234, 0.1);
}

.search-icon {
    position: absolute;
    left: 1rem;
    top: 50%;
    transform: translateY(-50%);
    color: var(--text-muted);
    pointer-events: none;
}

.search-select {
    padding: var(--spacing-md) var(--spacing-lg);
    border: 2px solid var(--border-color);
    border-radius: var(--radius-xl);
    background: var(--bg-card);
    color: var(--text-primary);
    font-size: 1rem;
    cursor: pointer;
    transition: all var(--transition-fast);
    min-width: 200px;
}

.search-select:focus {
    outline: none;
    border-color: var(--theme-primary);
}

.search-button {
    padding: var(--spacing-md) var(--spacing-2xl);
    background: var(--theme-gradient);
    color: white;
    border: none;
    border-radius: var(--radius-xl);
    font-size: 1rem;
    font-weight: 600;
    cursor: pointer;
    transition: all var(--transition-fast);
    box-shadow: var(--shadow-md);
}

.search-button:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow-lg);
}

.search-button:active {
    transform: translateY(0);
}

/* ==================== Product Grid ==================== */
.products-section {
    max-width: 1400px;
    margin: 0 auto;
    padding: var(--spacing-2xl) var(--spacing-xl);
}

.section-header {
    margin-bottom: var(--spacing-2xl);
}

.section-title {
    font-size: 2rem;
    font-weight: 700;
    margin-bottom: var(--spacing-sm);
    background: var(--theme-gradient);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.section-subtitle {
    color: var(--text-secondary);
    font-size: 1.125rem;
}

.products-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
    gap: var(--spacing-xl);
    margin-bottom: var(--spacing-2xl);
}

/* ==================== Product Cards ==================== */
.product-card {
    background: var(--bg-card);
    border-radius: var(--radius-2xl);
    overflow: hidden;
    box-shadow: var(--shadow-md);
    transition: all var(--transition-base);
    cursor: pointer;
    border: 1px solid var(--border-color);
    position: relative;
}

.product-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 4px;
    background: var(--theme-gradient);
    transform: scaleX(0);
    transition: transform var(--transition-base);
}

.product-card:hover::before {
    transform: scaleX(1);
}

.product-card:hover {
    transform: translateY(-8px);
    box-shadow: var(--shadow-2xl);
    border-color: transparent;
}

.product-image-wrapper {
    position: relative;
    width: 100%;
    height: 220px;
    overflow: hidden;
    background: linear-gradient(135deg, #667eea15 0%, #764ba215 100%);
}

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

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

.product-badge {
    position: absolute;
    top: var(--spacing-md);
    right: var(--spacing-md);
    padding: var(--spacing-sm) var(--spacing-md);
    background: rgba(255, 215, 0, 0.95);
    color: #000;
    border-radius: var(--radius-full);
    font-size: 0.875rem;
    font-weight: 600;
    display: flex;
    align-items: center;
    gap: var(--spacing-xs);
    backdrop-filter: blur(10px);
    box-shadow: var(--shadow-lg);
    animation: pulse 2s infinite;
}

@keyframes pulse {
    0%, 100% { transform: scale(1); }
    50% { transform: scale(1.05); }
}

.product-content {
    padding: var(--spacing-lg);
}

.product-title {
    font-size: 1.25rem;
    font-weight: 600;
    margin-bottom: var(--spacing-sm);
    color: var(--text-primary);
    line-height: 1.4;
}

.product-description {
    color: var(--text-secondary);
    font-size: 0.938rem;
    line-height: 1.6;
    margin-bottom: var(--spacing-md);
    display: -webkit-box;
    -webkit-line-clamp: 3;
    -webkit-box-orient: vertical;
    overflow: hidden;
}

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

.product-meta {
    display: flex;
    align-items: center;
    gap: var(--spacing-md);
    font-size: 0.875rem;
    color: var(--text-muted);
}

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

.view-more-btn {
    padding: var(--spacing-sm) var(--spacing-lg);
    background: var(--theme-gradient);
    color: white;
    border: none;
    border-radius: var(--radius-lg);
    font-size: 0.875rem;
    font-weight: 600;
    cursor: pointer;
    transition: all var(--transition-fast);
    box-shadow: var(--shadow-sm);
}

.view-more-btn:hover {
    box-shadow: var(--shadow-md);
    transform: translateX(2px);
}

/* ==================== Empty State ==================== */
.empty-state {
    text-align: center;
    padding: var(--spacing-2xl) var(--spacing-xl);
    color: var(--text-secondary);
}

.empty-state-icon {
    font-size: 4rem;
    margin-bottom: var(--spacing-lg);
    opacity: 0.5;
}

.empty-state-title {
    font-size: 1.5rem;
    font-weight: 600;
    margin-bottom: var(--spacing-sm);
    color: var(--text-primary);
}

.empty-state-text {
    font-size: 1.125rem;
    color: var(--text-secondary);
}

/* ==================== Pagination ==================== */
.pagination-wrapper {
    display: flex;
    justify-content: center;
    margin-top: var(--spacing-2xl);
}

.pagination {
    display: flex;
    gap: var(--spacing-sm);
    list-style: none;
    padding: 0;
    margin: 0;
}

.page-item {
    display: inline-block;
}

.page-link {
    display: flex;
    align-items: center;
    justify-content: center;
    min-width: 40px;
    height: 40px;
    padding: var(--spacing-sm) var(--spacing-md);
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-lg);
    color: var(--text-primary);
    text-decoration: none;
    font-weight: 500;
    transition: all var(--transition-fast);
}

.page-link:hover {
    background: var(--theme-primary);
    color: white;
    border-color: var(--theme-primary);
    transform: translateY(-2px);
    box-shadow: var(--shadow-md);
}

.page-item.active .page-link {
    background: var(--theme-gradient);
    color: white;
    border-color: transparent;
    box-shadow: var(--shadow-md);
}

.page-item.disabled .page-link {
    opacity: 0.5;
    cursor: not-allowed;
    pointer-events: none;
}

/* ==================== Footer ==================== */
.store-footer {
    background: var(--bg-secondary);
    border-top: 1px solid var(--border-color);
    padding: var(--spacing-2xl) var(--spacing-xl);
    margin-top: var(--spacing-2xl);
}

.footer-content {
    max-width: 1400px;
    margin: 0 auto;
    text-align: center;
    color: var(--text-secondary);
}

.footer-text {
    margin-bottom: var(--spacing-sm);
}

.footer-links {
    display: flex;
    justify-content: center;
    gap: var(--spacing-lg);
    flex-wrap: wrap;
}

.footer-link {
    color: var(--text-secondary);
    text-decoration: none;
    transition: color var(--transition-fast);
}

.footer-link:hover {
    color: var(--theme-primary);
}

/* ==================== Responsive Design ==================== */
@media (max-width: 768px) {
    .header-content {
        flex-direction: column;
        gap: var(--spacing-md);
    }

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

    .search-input-wrapper,
    .search-select,
    .search-button {
        width: 100%;
    }

    .products-grid {
        grid-template-columns: 1fr;
        gap: var(--spacing-lg);
    }

    .section-title {
        font-size: 1.5rem;
    }
}

@media (min-width: 769px) and (max-width: 1024px) {
    .products-grid {
        grid-template-columns: repeat(2, 1fr);
    }
}

@media (min-width: 1025px) {
    .products-grid {
        grid-template-columns: repeat(auto-fill, minmax(320px, 1fr));
    }
}

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

.product-card {
    animation: fadeInUp var(--transition-base) ease-out;
    animation-fill-mode: both;
}

.product-card:nth-child(1) { animation-delay: 0ms; }
.product-card:nth-child(2) { animation-delay: 50ms; }
.product-card:nth-child(3) { animation-delay: 100ms; }
.product-card:nth-child(4) { animation-delay: 150ms; }
.product-card:nth-child(5) { animation-delay: 200ms; }
.product-card:nth-child(6) { animation-delay: 250ms; }

/* ==================== Loading States ==================== */
.skeleton {
    background: linear-gradient(
        90deg,
        var(--bg-secondary) 25%,
        var(--bg-card) 50%,
        var(--bg-secondary) 75%
    );
    background-size: 200% 100%;
    animation: loading 1.5s infinite;
}

@keyframes loading {
    0% { background-position: 200% 0; }
    100% { background-position: -200% 0; }
}