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

:root {
    --primary-color: #3b82f6;
    --primary-dark: #2563eb;
    --primary-light: #60a5fa;
    --secondary-color: #10b981;
    --secondary-dark: #059669;
    --danger-color: #ef4444;
    --warning-color: #f59e0b;
    --dark-color: #1e293b;
    --dark-light: #334155;
    --light-color: #f8fafc;
    --light-gray: #f1f5f9;
    --border-color: #e2e8f0;
    --text-color: #1e293b;
    --text-light: #64748b;
    --text-lighter: #94a3b8;
    --shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, 0.05);
    --shadow: 0 4px 6px -1px rgba(0, 0, 0, 0.1), 0 2px 4px -1px rgba(0, 0, 0, 0.06);
    --shadow-md: 0 10px 15px -3px rgba(0, 0, 0, 0.1), 0 4px 6px -2px rgba(0, 0, 0, 0.05);
    --shadow-lg: 0 20px 25px -5px rgba(0, 0, 0, 0.1), 0 10px 10px -5px rgba(0, 0, 0, 0.04);
    --shadow-xl: 0 25px 50px -12px rgba(0, 0, 0, 0.25);
    --gradient-primary: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    --gradient-blue: linear-gradient(135deg, #3b82f6 0%, #2563eb 100%);
    --gradient-green: linear-gradient(135deg, #10b981 0%, #059669 100%);
}

html {
    scroll-behavior: smooth;
}

body {
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
    color: var(--text-color);
    background: linear-gradient(135deg, #f8fafc 0%, #f1f5f9 100%);
    background-attachment: fixed;
    line-height: 1.6;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

.container {
    max-width: 1280px;
    margin: 0 auto;
    padding: 0 24px;
}

/* Header - Modern Glassmorphism */
.main-header {
    background: rgba(59, 130, 246, 0.95);
    backdrop-filter: blur(10px);
    -webkit-backdrop-filter: blur(10px);
    color: white;
    padding: 1.25rem 0;
    box-shadow: var(--shadow-md);
    position: sticky;
    top: 0;
    z-index: 1000;
    border-bottom: 1px solid rgba(255, 255, 255, 0.1);
    transition: all 0.3s ease;
}

.main-header:hover {
    background: rgba(37, 99, 235, 0.98);
    box-shadow: var(--shadow-lg);
}

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

.logo h1 {
    font-size: 1.75rem;
    font-weight: 800;
    display: flex;
    align-items: center;
    gap: 0.75rem;
    background: linear-gradient(135deg, #ffffff 0%, #e0e7ff 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    letter-spacing: -0.5px;
}

.logo i {
    font-size: 2rem;
    background: linear-gradient(135deg, #ffffff 0%, #e0e7ff 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    animation: pulse 2s ease-in-out infinite;
}

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

.main-nav ul {
    display: flex;
    list-style: none;
    gap: 0.5rem;
    flex-wrap: wrap;
}

.main-nav a {
    color: white;
    text-decoration: none;
    font-weight: 600;
    padding: 0.625rem 1.25rem;
    border-radius: 8px;
    transition: all 0.3s ease;
    display: flex;
    align-items: center;
    gap: 0.5rem;
    font-size: 0.95rem;
    position: relative;
    overflow: hidden;
}

.main-nav a::before {
    content: '';
    position: absolute;
    top: 0;
    left: -100%;
    width: 100%;
    height: 100%;
    background: rgba(255, 255, 255, 0.1);
    transition: left 0.3s ease;
}

.main-nav a:hover::before {
    left: 0;
}

.main-nav a:hover {
    background: rgba(255, 255, 255, 0.15);
    transform: translateY(-2px);
}

.mobile-menu-toggle {
    display: none;
    background: rgba(255, 255, 255, 0.2);
    border: none;
    color: white;
    font-size: 1.5rem;
    cursor: pointer;
    padding: 0.75rem;
    border-radius: 8px;
    transition: all 0.3s ease;
}

.mobile-menu-toggle:hover {
    background: rgba(255, 255, 255, 0.3);
    transform: scale(1.1);
}

/* Main Content */
.main-content {
    min-height: calc(100vh - 200px);
    padding: 3rem 0;
    animation: fadeIn 0.6s ease-in;
}

@keyframes fadeIn {
    from {
        opacity: 0;
        transform: translateY(20px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.page-header {
    text-align: center;
    margin-bottom: 3rem;
    padding: 2rem 0;
}

.page-header h2 {
    font-size: 2.5rem;
    font-weight: 800;
    background: var(--gradient-blue);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    margin-bottom: 1rem;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 0.75rem;
    letter-spacing: -1px;
}

.page-header p {
    color: var(--text-light);
    font-size: 1.15rem;
    font-weight: 500;
}

/* Search & Filters - Modern Card */
.search-filters {
    background: rgba(255, 255, 255, 0.9);
    backdrop-filter: blur(10px);
    -webkit-backdrop-filter: blur(10px);
    padding: 2rem;
    border-radius: 16px;
    box-shadow: var(--shadow-lg);
    margin-bottom: 2.5rem;
    border: 1px solid rgba(255, 255, 255, 0.8);
    transition: all 0.3s ease;
}

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

.filter-form {
    width: 100%;
}

.filter-row {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
    gap: 1.25rem;
    align-items: end;
}

.filter-group {
    display: flex;
    flex-direction: column;
    gap: 0.625rem;
}

.filter-group label {
    font-weight: 700;
    color: var(--text-color);
    font-size: 0.9rem;
    display: flex;
    align-items: center;
    gap: 0.5rem;
    text-transform: uppercase;
    letter-spacing: 0.5px;
    font-size: 0.75rem;
}

.filter-group input,
.filter-group select {
    padding: 0.875rem 1rem;
    border: 2px solid var(--border-color);
    border-radius: 10px;
    font-size: 1rem;
    transition: all 0.3s ease;
    background: white;
    font-weight: 500;
}

.filter-group input:focus,
.filter-group select:focus {
    outline: none;
    border-color: var(--primary-color);
    box-shadow: 0 0 0 3px rgba(59, 130, 246, 0.1);
    transform: translateY(-2px);
}

.filter-group button {
    margin-top: 0;
}

/* Buttons - Modern Design */
.btn {
    padding: 0.875rem 1.75rem;
    border: none;
    border-radius: 10px;
    font-size: 1rem;
    font-weight: 700;
    cursor: pointer;
    transition: all 0.3s ease;
    display: inline-flex;
    align-items: center;
    gap: 0.625rem;
    text-decoration: none;
    position: relative;
    overflow: hidden;
    letter-spacing: 0.3px;
    text-transform: uppercase;
    font-size: 0.875rem;
}

.btn::before {
    content: '';
    position: absolute;
    top: 50%;
    left: 50%;
    width: 0;
    height: 0;
    border-radius: 50%;
    background: rgba(255, 255, 255, 0.3);
    transform: translate(-50%, -50%);
    transition: width 0.6s, height 0.6s;
}

.btn:hover::before {
    width: 300px;
    height: 300px;
}

.btn-primary {
    background: var(--gradient-blue);
    color: white;
    box-shadow: var(--shadow-md);
}

.btn-primary:hover {
    transform: translateY(-3px);
    box-shadow: var(--shadow-lg);
}

.btn-secondary {
    background: var(--text-light);
    color: white;
    box-shadow: var(--shadow);
}

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

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

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

/* Products Grid - Modern Cards */
.products-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(320px, 1fr));
    gap: 2rem;
    margin-top: 2rem;
}

.product-card {
    background: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(10px);
    -webkit-backdrop-filter: blur(10px);
    border-radius: 16px;
    padding: 2rem;
    box-shadow: var(--shadow-md);
    transition: all 0.4s cubic-bezier(0.4, 0, 0.2, 1);
    display: flex;
    flex-direction: column;
    gap: 1.25rem;
    border: 1px solid rgba(255, 255, 255, 0.8);
    position: relative;
    overflow: hidden;
}

.product-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 4px;
    background: var(--gradient-blue);
    transform: scaleX(0);
    transition: transform 0.4s ease;
}

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

.product-card:hover {
    transform: translateY(-8px) scale(1.02);
    box-shadow: var(--shadow-xl);
    border-color: var(--primary-light);
}

.product-header {
    border-bottom: 2px solid var(--border-color);
    padding-bottom: 1.25rem;
}

.product-header h3 {
    font-size: 1.35rem;
    font-weight: 700;
    color: var(--dark-color);
    margin-bottom: 0.75rem;
    line-height: 1.4;
}

.product-code {
    display: inline-block;
    background: var(--gradient-blue);
    color: white;
    padding: 0.375rem 1rem;
    border-radius: 20px;
    font-size: 0.8rem;
    font-weight: 700;
    letter-spacing: 0.5px;
    box-shadow: var(--shadow-sm);
}

.product-info {
    display: flex;
    flex-direction: column;
    gap: 0.625rem;
}

.info-item {
    display: flex;
    align-items: center;
    gap: 0.625rem;
    color: var(--text-light);
    font-size: 0.9rem;
    font-weight: 500;
}

.info-item i {
    color: var(--primary-color);
    width: 18px;
}

/* Price Comparison - Beautiful Design */
.price-comparison {
    background: linear-gradient(135deg, #eff6ff 0%, #dbeafe 50%, #bfdbfe 100%);
    padding: 1.5rem;
    border-radius: 12px;
    margin: 1.25rem 0;
    border: 2px solid rgba(59, 130, 246, 0.2);
    position: relative;
    overflow: hidden;
}

.price-comparison::before {
    content: '';
    position: absolute;
    top: -50%;
    right: -50%;
    width: 200%;
    height: 200%;
    background: radial-gradient(circle, rgba(59, 130, 246, 0.1) 0%, transparent 70%);
    animation: rotate 20s linear infinite;
}

@keyframes rotate {
    from { transform: rotate(0deg); }
    to { transform: rotate(360deg); }
}

.price-range {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 1.25rem;
    margin-bottom: 1rem;
    position: relative;
    z-index: 1;
}

.price-item {
    text-align: center;
    padding: 1rem;
    background: rgba(255, 255, 255, 0.7);
    border-radius: 10px;
    backdrop-filter: blur(5px);
}

.price-label {
    display: block;
    font-size: 0.8rem;
    color: var(--text-light);
    margin-bottom: 0.5rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

.price-value {
    display: block;
    font-size: 1.75rem;
    font-weight: 800;
    color: var(--primary-color);
    letter-spacing: -1px;
}

.min-price .price-value {
    color: var(--secondary-color);
    background: var(--gradient-green);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.max-price .price-value {
    color: var(--danger-color);
}

.price-diff {
    text-align: center;
    font-size: 0.95rem;
    color: var(--text-color);
    padding-top: 1rem;
    border-top: 2px solid rgba(59, 130, 246, 0.2);
    font-weight: 600;
    position: relative;
    z-index: 1;
}

.no-price {
    text-align: center;
    color: var(--text-light);
    font-style: italic;
    padding: 1rem;
}

.product-meta {
    display: flex;
    justify-content: space-around;
    padding: 1.25rem 0;
    border-top: 2px solid var(--border-color);
    border-bottom: 2px solid var(--border-color);
    background: var(--light-gray);
    border-radius: 8px;
    margin: 0.5rem 0;
}

.meta-item {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 0.5rem;
    font-size: 0.85rem;
    color: var(--text-light);
    font-weight: 600;
}

.meta-item i {
    font-size: 1.5rem;
    background: var(--gradient-blue);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.product-actions {
    margin-top: auto;
    padding-top: 1rem;
}

/* No Results */
.no-results {
    grid-column: 1 / -1;
    text-align: center;
    padding: 5rem 2rem;
    color: var(--text-light);
    background: rgba(255, 255, 255, 0.7);
    border-radius: 16px;
    backdrop-filter: blur(10px);
}

.no-results i {
    font-size: 5rem;
    margin-bottom: 1.5rem;
    opacity: 0.4;
    background: var(--gradient-blue);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.no-results h3 {
    font-size: 1.75rem;
    margin-bottom: 0.75rem;
    color: var(--text-color);
    font-weight: 700;
}

/* Footer - Modern Design */
.main-footer {
    background: linear-gradient(135deg, var(--dark-color) 0%, var(--dark-light) 100%);
    color: white;
    padding: 4rem 0 1.5rem;
    margin-top: 5rem;
    position: relative;
    overflow: hidden;
}

.main-footer::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 4px;
    background: var(--gradient-blue);
}

.footer-content {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 3rem;
    margin-bottom: 3rem;
    position: relative;
    z-index: 1;
}

.footer-section h4 {
    margin-bottom: 1.5rem;
    font-size: 1.35rem;
    font-weight: 700;
    background: var(--gradient-blue);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

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

.footer-section ul li {
    margin-bottom: 0.75rem;
}

.footer-section a {
    color: rgba(255, 255, 255, 0.8);
    text-decoration: none;
    transition: all 0.3s ease;
    display: inline-block;
    font-weight: 500;
}

.footer-section a:hover {
    color: white;
    transform: translateX(5px);
}

.footer-section p {
    color: rgba(255, 255, 255, 0.7);
    line-height: 1.8;
}

.footer-section i {
    margin-right: 0.5rem;
    color: var(--primary-light);
}

.footer-bottom {
    text-align: center;
    padding-top: 2rem;
    border-top: 1px solid rgba(255, 255, 255, 0.1);
    color: rgba(255, 255, 255, 0.6);
    font-size: 0.9rem;
    position: relative;
    z-index: 1;
}

/* Responsive Design */
@media (max-width: 768px) {
    .mobile-menu-toggle {
        display: block;
    }
    
    .main-nav {
        display: none;
        width: 100%;
        margin-top: 1rem;
        background: rgba(255, 255, 255, 0.1);
        backdrop-filter: blur(10px);
        padding: 1rem;
        border-radius: 12px;
    }
    
    .main-nav.active {
        display: block;
        animation: slideDown 0.3s ease;
    }
    
    @keyframes slideDown {
        from {
            opacity: 0;
            transform: translateY(-10px);
        }
        to {
            opacity: 1;
            transform: translateY(0);
        }
    }
    
    .main-nav ul {
        flex-direction: column;
        gap: 0.5rem;
    }
    
    .filter-row {
        grid-template-columns: 1fr;
    }
    
    .products-grid {
        grid-template-columns: 1fr;
        gap: 1.5rem;
    }
    
    .price-range {
        grid-template-columns: 1fr;
    }
    
    .page-header h2 {
        font-size: 1.75rem;
    }
    
    .main-content {
        padding: 2rem 0;
    }
}

@media (max-width: 480px) {
    .container {
        padding: 0 16px;
    }
    
    .logo h1 {
        font-size: 1.35rem;
    }
    
    .search-filters {
        padding: 1.5rem;
    }
    
    .product-card {
        padding: 1.5rem;
    }
    
    .page-header h2 {
        font-size: 1.5rem;
    }
}

/* Loading Animation */
@keyframes shimmer {
    0% {
        background-position: -1000px 0;
    }
    100% {
        background-position: 1000px 0;
    }
}

.loading {
    animation: shimmer 2s infinite;
    background: linear-gradient(to right, #f0f0f0 0%, #e0e0e0 20%, #f0f0f0 40%, #f0f0f0 100%);
    background-size: 1000px 100%;
}

/* Comparison Table Styles */
.comparison-table-container {
    margin-top: 2rem;
}

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

.comparison-table thead th {
    position: sticky;
    top: 0;
    z-index: 10;
}

.comparison-table tbody tr:hover {
    background: var(--light-gray);
    transition: background 0.3s;
}

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

/* Stock Card Styles */
.stock-card {
    transition: all 0.3s ease;
}

.stock-card:hover {
    transform: translateY(-4px);
    box-shadow: var(--shadow-xl);
}

/* Scrollbar Styling */
::-webkit-scrollbar {
    width: 10px;
}

::-webkit-scrollbar-track {
    background: var(--light-gray);
}

::-webkit-scrollbar-thumb {
    background: var(--gradient-blue);
    border-radius: 5px;
}

::-webkit-scrollbar-thumb:hover {
    background: var(--primary-dark);
}