/* CSS Variables */
:root {
    --primary: #2563eb;
    --primary-dark: #1d4ed8;
    --primary-light: #3b82f6;
    --secondary: #0f172a;
    --accent: #f59e0b;
    --success: #10b981;
    --text: #1e293b;
    --text-light: #64748b;
    --text-lighter: #94a3b8;
    --bg: #ffffff;
    --bg-alt: #f8fafc;
    --bg-dark: #0f172a;
    --border: #e2e8f0;
    --shadow: 0 4px 6px -1px rgba(0, 0, 0, 0.1), 0 2px 4px -2px rgba(0, 0, 0, 0.1);
    --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.1), 0 4px 6px -4px rgba(0, 0, 0, 0.1);
    --shadow-xl: 0 20px 25px -5px rgba(0, 0, 0, 0.1), 0 8px 10px -6px rgba(0, 0, 0, 0.1);
    --radius: 12px;
    --radius-sm: 8px;
    --transition: all 0.3s ease;
}

/* Reset */
*, *::before, *::after {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
}

html {
    scroll-behavior: smooth;
}

body {
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
    font-size: 16px;
    line-height: 1.6;
    color: var(--text);
    background: var(--bg);
    -webkit-font-smoothing: antialiased;
}

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

a {
    text-decoration: none;
    color: inherit;
}

ul {
    list-style: none;
}

/* Container */
.container {
    width: 100%;
    max-width: 1280px;
    margin: 0 auto;
    padding: 0 24px;
}

/* Header */
.header {
    position: sticky;
    top: 0;
    z-index: 1000;
    background: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(10px);
    border-bottom: 1px solid var(--border);
}

.nav {
    display: flex;
    align-items: center;
    justify-content: space-between;
    height: 72px;
}

.logo {
    display: flex;
    align-items: center;
    gap: 8px;
    font-size: 1.5rem;
    font-weight: 800;
}

.logo-icon {
    font-size: 1.75rem;
}

.logo-text {
    color: var(--secondary);
}

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

.nav-links {
    display: flex;
    gap: 32px;
}

.nav-links a {
    font-weight: 500;
    color: var(--text-light);
    transition: var(--transition);
    position: relative;
}

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

.nav-links a::after {
    content: '';
    position: absolute;
    bottom: -4px;
    left: 0;
    width: 0;
    height: 2px;
    background: var(--primary);
    transition: var(--transition);
}

.nav-links a:hover::after {
    width: 100%;
}

.mobile-menu-btn {
    display: none;
    flex-direction: column;
    gap: 5px;
    background: none;
    border: none;
    cursor: pointer;
    padding: 8px;
}

.mobile-menu-btn span {
    display: block;
    width: 24px;
    height: 2px;
    background: var(--text);
    transition: var(--transition);
}

/* Buttons */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: 12px 24px;
    font-size: 1rem;
    font-weight: 600;
    border-radius: var(--radius-sm);
    transition: var(--transition);
    cursor: pointer;
    border: none;
}

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

.btn-primary:hover {
    background: var(--primary-dark);
    transform: translateY(-2px);
    box-shadow: var(--shadow-lg);
}

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

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

.btn-small {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: 8px 16px;
    font-size: 0.875rem;
    font-weight: 600;
    background: var(--primary);
    color: white;
    border-radius: var(--radius-sm);
    transition: var(--transition);
}

.btn-small:hover {
    background: var(--primary-dark);
}

/* Hero Section */
.hero {
    background: linear-gradient(135deg, var(--bg-dark) 0%, #1e3a5f 100%);
    color: white;
    padding: 100px 0 120px;
    text-align: center;
    position: relative;
    overflow: hidden;
}

.hero::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: url("data:image/svg+xml,%3Csvg width='60' height='60' viewBox='0 0 60 60' xmlns='http://www.w3.org/2000/svg'%3E%3Cg fill='none' fill-rule='evenodd'%3E%3Cg fill='%23ffffff' fill-opacity='0.03'%3E%3Cpath d='M36 34v-4h-2v4h-4v2h4v4h2v-4h4v-2h-4zm0-30V0h-2v4h-4v2h4v4h2V6h4V4h-4zM6 34v-4H4v4H0v2h4v4h2v-4h4v-2H6zM6 4V0H4v4H0v2h4v4h2V6h4V4H6z'/%3E%3C/g%3E%3C/g%3E%3C/svg%3E");
    opacity: 0.5;
}

.hero h1 {
    font-size: 3.5rem;
    font-weight: 800;
    margin-bottom: 20px;
    position: relative;
    line-height: 1.2;
}

.hero-subtitle {
    font-size: 1.25rem;
    color: rgba(255, 255, 255, 0.8);
    max-width: 600px;
    margin: 0 auto 40px;
    position: relative;
}

.hero-cta {
    display: flex;
    gap: 16px;
    justify-content: center;
    margin-bottom: 60px;
    position: relative;
}

.hero-stats {
    display: flex;
    justify-content: center;
    gap: 60px;
    position: relative;
}

.stat {
    text-align: center;
}

.stat-number {
    display: block;
    font-size: 2.5rem;
    font-weight: 800;
    color: var(--accent);
}

.stat-label {
    font-size: 0.875rem;
    color: rgba(255, 255, 255, 0.7);
    text-transform: uppercase;
    letter-spacing: 1px;
}

/* Sections */
.section {
    padding: 80px 0;
}

.section-header {
    text-align: center;
    margin-bottom: 50px;
}

.section-header h2 {
    font-size: 2.25rem;
    font-weight: 800;
    color: var(--secondary);
    margin-bottom: 12px;
}

.section-header p {
    font-size: 1.125rem;
    color: var(--text-light);
    max-width: 600px;
    margin: 0 auto;
}

/* Products Grid */
.products-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 30px;
}

/* Product Card */
.product-card {
    background: white;
    border-radius: var(--radius);
    overflow: hidden;
    box-shadow: var(--shadow);
    transition: var(--transition);
    position: relative;
}

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

.badge {
    position: absolute;
    top: 16px;
    left: 16px;
    padding: 6px 12px;
    font-size: 0.75rem;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 0.5px;
    border-radius: 20px;
    z-index: 10;
}

.badge-best {
    background: var(--accent);
    color: white;
}

.badge-value {
    background: var(--success);
    color: white;
}

.badge-premium {
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    color: white;
}

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

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

.product-card:hover .product-image img {
    transform: scale(1.05);
}

.product-content {
    padding: 24px;
}

.product-brand {
    display: inline-block;
    font-size: 0.75rem;
    font-weight: 700;
    color: var(--primary);
    text-transform: uppercase;
    letter-spacing: 1px;
    margin-bottom: 8px;
}

.product-title {
    font-size: 1.25rem;
    font-weight: 700;
    color: var(--secondary);
    margin-bottom: 10px;
    line-height: 1.3;
}

.product-description {
    font-size: 0.9rem;
    color: var(--text-light);
    margin-bottom: 16px;
    line-height: 1.5;
}

.product-features {
    display: flex;
    flex-wrap: wrap;
    gap: 8px;
    margin-bottom: 16px;
}

.product-features span {
    padding: 4px 10px;
    font-size: 0.75rem;
    font-weight: 500;
    background: var(--bg-alt);
    color: var(--text-light);
    border-radius: 20px;
}

.product-rating {
    display: flex;
    align-items: center;
    gap: 8px;
    margin-bottom: 16px;
}

.stars {
    color: var(--accent);
    font-size: 1rem;
}

.rating-text {
    font-size: 0.875rem;
    font-weight: 600;
    color: var(--text);
}

.product-price {
    display: flex;
    align-items: baseline;
    gap: 6px;
    margin-bottom: 20px;
}

.price {
    font-size: 1.5rem;
    font-weight: 800;
    color: var(--secondary);
}

.price-note {
    font-size: 0.875rem;
    color: var(--text-light);
}

.product-card .btn {
    width: 100%;
}

/* Alt section backgrounds */
.oled-section {
    background: var(--bg-alt);
}

.budget-section {
    background: var(--bg-alt);
}

/* Guide Section */
.guide-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 30px;
}

.guide-card {
    background: white;
    padding: 32px;
    border-radius: var(--radius);
    box-shadow: var(--shadow);
    text-align: center;
    transition: var(--transition);
}

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

.guide-icon {
    font-size: 3rem;
    margin-bottom: 16px;
}

.guide-card h3 {
    font-size: 1.25rem;
    font-weight: 700;
    color: var(--secondary);
    margin-bottom: 12px;
}

.guide-card p {
    font-size: 0.95rem;
    color: var(--text-light);
    line-height: 1.6;
}

/* Comparison Table */
.comparison-section {
    background: var(--bg-alt);
}

.comparison-table-wrapper {
    overflow-x: auto;
    border-radius: var(--radius);
    box-shadow: var(--shadow);
}

.comparison-table {
    width: 100%;
    background: white;
    border-collapse: collapse;
    min-width: 700px;
}

.comparison-table th,
.comparison-table td {
    padding: 16px 20px;
    text-align: left;
    border-bottom: 1px solid var(--border);
}

.comparison-table th {
    background: var(--secondary);
    color: white;
    font-weight: 600;
    font-size: 0.875rem;
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

.comparison-table tbody tr:hover {
    background: var(--bg-alt);
}

.comparison-table tbody tr:last-child td {
    border-bottom: none;
}

/* SEO Section */
.seo-section {
    background: white;
    border-top: 1px solid var(--border);
}

.seo-content {
    max-width: 900px;
    margin: 0 auto;
}

.seo-content h2 {
    font-size: 1.75rem;
    font-weight: 700;
    color: var(--secondary);
    margin-bottom: 24px;
    text-align: center;
}

.seo-content p {
    font-size: 1rem;
    color: var(--text-light);
    line-height: 1.8;
    margin-bottom: 20px;
}

.seo-content p:last-child {
    margin-bottom: 0;
}

/* Footer */
.footer {
    background: var(--bg-dark);
    color: white;
    padding: 60px 0 30px;
}

.footer-grid {
    display: grid;
    grid-template-columns: 2fr 1fr 1fr 1fr;
    gap: 40px;
    margin-bottom: 40px;
}

.footer-brand p {
    color: rgba(255, 255, 255, 0.7);
    margin-top: 16px;
    font-size: 0.95rem;
}

.footer-brand .logo {
    color: white;
}

.footer-links h4 {
    font-size: 1rem;
    font-weight: 700;
    margin-bottom: 20px;
    color: white;
}

.footer-links ul {
    display: flex;
    flex-direction: column;
    gap: 12px;
}

.footer-links a {
    color: rgba(255, 255, 255, 0.7);
    font-size: 0.95rem;
    transition: var(--transition);
}

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

.footer-bottom {
    padding-top: 30px;
    border-top: 1px solid rgba(255, 255, 255, 0.1);
    text-align: center;
}

.footer-bottom p {
    font-size: 0.875rem;
    color: rgba(255, 255, 255, 0.6);
    margin-bottom: 8px;
}

.affiliate-disclosure {
    font-size: 0.8rem !important;
    color: rgba(255, 255, 255, 0.4) !important;
}

/* Responsive Design */
@media (max-width: 1024px) {
    .products-grid {
        grid-template-columns: repeat(2, 1fr);
    }

    .guide-grid {
        grid-template-columns: repeat(2, 1fr);
    }

    .footer-grid {
        grid-template-columns: repeat(2, 1fr);
    }
}

@media (max-width: 768px) {
    .nav-links {
        position: fixed;
        top: 72px;
        left: 0;
        right: 0;
        background: white;
        flex-direction: column;
        align-items: center;
        padding: 30px;
        gap: 20px;
        box-shadow: var(--shadow-lg);
        transform: translateY(-100%);
        opacity: 0;
        visibility: hidden;
        transition: var(--transition);
    }

    .nav-links.active {
        transform: translateY(0);
        opacity: 1;
        visibility: visible;
    }

    .mobile-menu-btn {
        display: flex;
    }

    .mobile-menu-btn.active span:nth-child(1) {
        transform: rotate(45deg) translate(5px, 5px);
    }

    .mobile-menu-btn.active span:nth-child(2) {
        opacity: 0;
    }

    .mobile-menu-btn.active span:nth-child(3) {
        transform: rotate(-45deg) translate(5px, -5px);
    }

    .hero {
        padding: 60px 0 80px;
    }

    .hero h1 {
        font-size: 2.25rem;
    }

    .hero-subtitle {
        font-size: 1rem;
    }

    .hero-cta {
        flex-direction: column;
        align-items: center;
    }

    .hero-stats {
        flex-direction: column;
        gap: 30px;
    }

    .section {
        padding: 60px 0;
    }

    .section-header h2 {
        font-size: 1.75rem;
    }

    .products-grid {
        grid-template-columns: 1fr;
    }

    .guide-grid {
        grid-template-columns: 1fr;
    }

    .footer-grid {
        grid-template-columns: 1fr;
        text-align: center;
    }

    .footer-brand .logo {
        justify-content: center;
    }
}

@media (max-width: 480px) {
    .container {
        padding: 0 16px;
    }

    .hero h1 {
        font-size: 1.875rem;
    }

    .product-content {
        padding: 20px;
    }

    .guide-card {
        padding: 24px;
    }

    .comparison-table th,
    .comparison-table td {
        padding: 12px 16px;
        font-size: 0.875rem;
    }
}

/* Print styles */
@media print {
    .header,
    .hero-cta,
    .btn,
    .footer {
        display: none;
    }

    .section {
        padding: 20px 0;
    }

    .product-card {
        break-inside: avoid;
        box-shadow: none;
        border: 1px solid #ddd;
    }
}