/* CSS Variables */
:root {
    --primary: #3b82f6;
    --primary-dark: #2563eb;
    --primary-light: #60a5fa;
    --secondary: #10b981;
    --accent: #f59e0b;
    --dark: #0f172a;
    --dark-light: #1e293b;
    --gray-900: #111827;
    --gray-800: #1f2937;
    --gray-700: #374151;
    --gray-600: #4b5563;
    --gray-500: #6b7280;
    --gray-400: #9ca3af;
    --gray-300: #d1d5db;
    --gray-200: #e5e7eb;
    --gray-100: #f3f4f6;
    --white: #ffffff;
    --gradient: linear-gradient(135deg, var(--primary) 0%, var(--primary-dark) 100%);
    --shadow-sm: 0 1px 2px 0 rgb(0 0 0 / 0.05);
    --shadow: 0 4px 6px -1px rgb(0 0 0 / 0.1), 0 2px 4px -2px rgb(0 0 0 / 0.1);
    --shadow-md: 0 10px 15px -3px rgb(0 0 0 / 0.1), 0 4px 6px -4px rgb(0 0 0 / 0.1);
    --shadow-lg: 0 20px 25px -5px rgb(0 0 0 / 0.1), 0 8px 10px -6px rgb(0 0 0 / 0.1);
    --radius: 12px;
    --radius-sm: 8px;
    --radius-lg: 16px;
    --transition: all 0.3s ease;
}

/* Reset & Base */
*, *::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;
    background: var(--gray-100);
    color: var(--gray-800);
    line-height: 1.6;
    overflow-x: hidden;
}

.container {
    max-width: 1280px;
    margin: 0 auto;
    padding: 0 20px;
}

h1, h2, h3, h4, h5, h6 {
    font-weight: 700;
    line-height: 1.2;
    color: var(--dark);
}

a {
    text-decoration: none;
    color: inherit;
    transition: var(--transition);
}

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

/* Buttons */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    padding: 14px 28px;
    font-size: 16px;
    font-weight: 600;
    border-radius: var(--radius);
    border: none;
    cursor: pointer;
    transition: var(--transition);
}

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

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

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

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

.btn-amazon {
    background: #ff9900;
    color: var(--dark);
    font-weight: 700;
}

.btn-amazon:hover {
    background: #e68a00;
    transform: translateY(-2px);
}

.btn-small {
    padding: 10px 20px;
    font-size: 14px;
}

/* Header */
.header {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    background: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(10px);
    z-index: 1000;
    box-shadow: var(--shadow-sm);
}

.header-content {
    display: flex;
    align-items: center;
    justify-content: space-between;
    height: 70px;
}

.logo {
    display: flex;
    align-items: center;
    gap: 8px;
    font-size: 24px;
    font-weight: 800;
}

.logo-icon {
    font-size: 28px;
}

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

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

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

.nav-link {
    font-weight: 500;
    color: var(--gray-600);
    position: relative;
}

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

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

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

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

.mobile-menu-btn span {
    display: block;
    width: 25px;
    height: 3px;
    background: var(--dark);
    border-radius: 2px;
    transition: var(--transition);
}

/* Hero Section */
.hero {
    padding: 140px 0 80px;
    background: linear-gradient(135deg, var(--dark) 0%, var(--dark-light) 100%);
    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='%233b82f6' fill-opacity='0.05'%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-content {
    position: relative;
    text-align: center;
    max-width: 800px;
    margin: 0 auto;
}

.hero h1 {
    font-size: 56px;
    color: var(--white);
    margin-bottom: 20px;
}

.hero .highlight {
    background: var(--gradient);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.hero-subtitle {
    font-size: 20px;
    color: var(--gray-400);
    margin-bottom: 32px;
    max-width: 600px;
    margin-left: auto;
    margin-right: auto;
}

.hero-cta {
    display: flex;
    gap: 16px;
    justify-content: center;
    margin-bottom: 48px;
}

.hero-stats {
    display: flex;
    justify-content: center;
    gap: 48px;
}

.stat {
    text-align: center;
}

.stat-number {
    display: block;
    font-size: 36px;
    font-weight: 800;
    color: var(--primary-light);
}

.stat-label {
    font-size: 14px;
    color: var(--gray-400);
}

/* Section Styles */
.section-header {
    text-align: center;
    margin-bottom: 48px;
}

.section-header h2 {
    font-size: 36px;
    margin-bottom: 12px;
}

.section-header p {
    font-size: 18px;
    color: var(--gray-600);
}

/* Quiz Section */
.quiz-section {
    padding: 80px 0;
    background: var(--white);
}

.quiz-container {
    max-width: 700px;
    margin: 0 auto;
    background: var(--gray-100);
    border-radius: var(--radius-lg);
    padding: 40px;
    box-shadow: var(--shadow);
}

.quiz-progress {
    margin-bottom: 32px;
}

.progress-bar {
    height: 8px;
    background: var(--gray-300);
    border-radius: 4px;
    overflow: hidden;
    margin-bottom: 12px;
}

.progress-fill {
    height: 100%;
    background: var(--gradient);
    border-radius: 4px;
    transition: width 0.5s ease;
    width: 25%;
}

.progress-text {
    font-size: 14px;
    color: var(--gray-600);
}

.quiz-question {
    margin-bottom: 24px;
}

.quiz-question h3 {
    font-size: 24px;
    margin-bottom: 24px;
    text-align: center;
}

.quiz-options {
    display: grid;
    gap: 12px;
}

.quiz-option {
    padding: 16px 20px;
    background: var(--white);
    border: 2px solid var(--gray-300);
    border-radius: var(--radius);
    cursor: pointer;
    transition: var(--transition);
    font-size: 16px;
    text-align: left;
}

.quiz-option:hover {
    border-color: var(--primary);
    background: rgba(59, 130, 246, 0.05);
}

.quiz-option.selected {
    border-color: var(--primary);
    background: rgba(59, 130, 246, 0.1);
}

.quiz-nav {
    display: flex;
    justify-content: space-between;
    margin-top: 24px;
}

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

.quiz-result h3 {
    font-size: 28px;
    margin-bottom: 16px;
}

.quiz-result p {
    color: var(--gray-600);
    margin-bottom: 24px;
}

.recommended-tv {
    background: var(--white);
    border-radius: var(--radius);
    padding: 24px;
    margin-top: 24px;
    box-shadow: var(--shadow);
}

.recommended-tv h4 {
    font-size: 20px;
    margin-bottom: 8px;
    color: var(--primary);
}

.recommended-tv .price {
    font-size: 24px;
    font-weight: 700;
    color: var(--secondary);
    margin-bottom: 16px;
}

/* Products Section */
.products-section {
    padding: 80px 0;
    background: var(--gray-100);
}

.filters {
    display: flex;
    flex-wrap: wrap;
    gap: 16px;
    margin-bottom: 32px;
    padding: 24px;
    background: var(--white);
    border-radius: var(--radius);
    box-shadow: var(--shadow-sm);
    align-items: center;
}

.filter-group {
    display: flex;
    align-items: center;
    gap: 8px;
}

.filter-group label {
    font-weight: 500;
    color: var(--gray-600);
    font-size: 14px;
}

.filter-group select {
    padding: 10px 16px;
    border: 2px solid var(--gray-300);
    border-radius: var(--radius-sm);
    font-size: 14px;
    background: var(--white);
    cursor: pointer;
    transition: var(--transition);
}

.filter-group select:hover,
.filter-group select:focus {
    border-color: var(--primary);
    outline: none;
}

.view-toggle {
    display: flex;
    gap: 8px;
    margin-left: auto;
}

.view-btn {
    padding: 10px;
    background: var(--gray-200);
    border: none;
    border-radius: var(--radius-sm);
    cursor: pointer;
    transition: var(--transition);
    color: var(--gray-600);
}

.view-btn:hover {
    background: var(--gray-300);
}

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

/* Products Grid */
.products-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
    gap: 24px;
}

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

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

.product-badge {
    position: absolute;
    top: 16px;
    left: 16px;
    padding: 6px 12px;
    border-radius: 20px;
    font-size: 12px;
    font-weight: 600;
    z-index: 1;
}

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

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

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

.product-image {
    position: relative;
    padding: 24px;
    background: linear-gradient(135deg, var(--gray-100) 0%, var(--gray-200) 100%);
    display: flex;
    align-items: center;
    justify-content: center;
    min-height: 200px;
}

.product-image .tv-icon {
    font-size: 100px;
    opacity: 0.8;
}

.product-content {
    padding: 24px;
}

.product-brand {
    font-size: 12px;
    font-weight: 600;
    text-transform: uppercase;
    color: var(--gray-500);
    letter-spacing: 1px;
    margin-bottom: 8px;
}

.product-title {
    font-size: 18px;
    font-weight: 700;
    margin-bottom: 12px;
    color: var(--dark);
    line-height: 1.3;
}

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

.spec-tag {
    padding: 4px 10px;
    background: var(--gray-100);
    border-radius: 20px;
    font-size: 12px;
    color: var(--gray-600);
}

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

.stars {
    color: var(--accent);
    font-size: 14px;
}

.rating-value {
    font-weight: 600;
    color: var(--gray-700);
}

.rating-count {
    color: var(--gray-500);
    font-size: 13px;
}

.product-footer {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding-top: 16px;
    border-top: 1px solid var(--gray-200);
}

.product-price {
    font-size: 24px;
    font-weight: 800;
    color: var(--dark);
}

.product-price .currency {
    font-size: 16px;
    font-weight: 600;
}

.compare-checkbox {
    display: flex;
    align-items: center;
    gap: 6px;
    font-size: 13px;
    color: var(--gray-600);
    cursor: pointer;
}

.compare-checkbox input {
    width: 18px;
    height: 18px;
    cursor: pointer;
}

/* Products Table */
.products-table-container {
    overflow-x: auto;
    background: var(--white);
    border-radius: var(--radius);
    box-shadow: var(--shadow);
}

.products-table {
    width: 100%;
    border-collapse: collapse;
    font-size: 14px;
}

.products-table th,
.products-table td {
    padding: 16px;
    text-align: left;
    border-bottom: 1px solid var(--gray-200);
}

.products-table th {
    background: var(--gray-100);
    font-weight: 600;
    color: var(--gray-700);
    position: sticky;
    top: 0;
}

.products-table tr:hover {
    background: var(--gray-50);
}

.products-table .price {
    font-weight: 700;
    color: var(--dark);
}

.table-rating {
    display: flex;
    align-items: center;
    gap: 4px;
}

/* Compare Section */
.compare-section {
    padding: 80px 0;
    background: var(--white);
}

.compare-selector {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 16px;
    margin-bottom: 32px;
}

.compare-slot {
    position: relative;
}

.compare-select {
    width: 100%;
    padding: 16px;
    border: 2px solid var(--gray-300);
    border-radius: var(--radius);
    font-size: 16px;
    background: var(--white);
    cursor: pointer;
    transition: var(--transition);
}

.compare-select:hover,
.compare-select:focus {
    border-color: var(--primary);
    outline: none;
}

.compare-clear {
    position: absolute;
    right: 40px;
    top: 50%;
    transform: translateY(-50%);
    background: var(--gray-300);
    border: none;
    width: 24px;
    height: 24px;
    border-radius: 50%;
    cursor: pointer;
    font-size: 14px;
    display: flex;
    align-items: center;
    justify-content: center;
}

.compare-clear:hover {
    background: var(--gray-400);
}

.compare-table-container {
    overflow-x: auto;
}

.compare-table {
    width: 100%;
    border-collapse: collapse;
    background: var(--white);
    border-radius: var(--radius);
    overflow: hidden;
    box-shadow: var(--shadow);
}

.compare-table th,
.compare-table td {
    padding: 16px 20px;
    text-align: center;
    border-bottom: 1px solid var(--gray-200);
}

.compare-table th {
    background: var(--gray-100);
    font-weight: 600;
}

.compare-table th:first-child,
.compare-table td:first-child {
    text-align: left;
    font-weight: 600;
    background: var(--gray-50);
    min-width: 150px;
}

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

.compare-winner {
    background: rgba(16, 185, 129, 0.1);
    color: var(--secondary);
    font-weight: 600;
}

/* Guide Section */
.guide-section {
    padding: 80px 0;
    background: var(--gray-100);
}

.guide-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(350px, 1fr));
    gap: 24px;
}

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

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

.guide-icon {
    font-size: 48px;
    margin-bottom: 16px;
}

.guide-card h3 {
    font-size: 20px;
    margin-bottom: 12px;
}

.guide-card p {
    color: var(--gray-600);
    line-height: 1.7;
}

/* SEO Section */
.seo-section {
    padding: 80px 0;
    background: var(--white);
}

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

.seo-content h2 {
    font-size: 32px;
    margin-bottom: 24px;
    color: var(--dark);
}

.seo-content h3 {
    font-size: 22px;
    margin-top: 32px;
    margin-bottom: 16px;
    color: var(--dark);
}

.seo-content p {
    color: var(--gray-700);
    line-height: 1.8;
    margin-bottom: 16px;
}

/* Footer */
.footer {
    background: var(--dark);
    color: var(--gray-400);
    padding: 64px 0 32px;
}

.footer-content {
    display: grid;
    grid-template-columns: 2fr 1fr 1fr 1fr;
    gap: 48px;
    margin-bottom: 48px;
}

.footer-brand p {
    margin-top: 16px;
    line-height: 1.7;
}

.footer-brand .logo {
    color: var(--white);
}

.footer-links h4 {
    color: var(--white);
    font-size: 16px;
    margin-bottom: 20px;
}

.footer-links a {
    display: block;
    color: var(--gray-400);
    padding: 6px 0;
    transition: var(--transition);
}

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

.footer-bottom {
    padding-top: 32px;
    border-top: 1px solid var(--gray-800);
    text-align: center;
}

.footer-bottom p {
    margin-bottom: 8px;
}

.affiliate-disclosure {
    font-size: 13px;
    opacity: 0.7;
}

/* Mobile Menu */
.mobile-menu {
    position: fixed;
    top: 70px;
    left: 0;
    right: 0;
    background: var(--white);
    padding: 20px;
    box-shadow: var(--shadow-lg);
    z-index: 999;
    transform: translateY(-100%);
    opacity: 0;
    visibility: hidden;
    transition: var(--transition);
}

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

.mobile-nav {
    display: flex;
    flex-direction: column;
    gap: 16px;
}

.mobile-nav-link {
    font-size: 18px;
    font-weight: 500;
    color: var(--gray-700);
    padding: 12px 0;
    border-bottom: 1px solid var(--gray-200);
}

/* Responsive */
@media (max-width: 1024px) {
    .hero h1 {
        font-size: 42px;
    }

    .footer-content {
        grid-template-columns: 1fr 1fr;
    }

    .compare-selector {
        grid-template-columns: 1fr;
    }
}

@media (max-width: 768px) {
    .nav {
        display: none;
    }

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

    .hero {
        padding: 120px 0 60px;
    }

    .hero h1 {
        font-size: 32px;
    }

    .hero-subtitle {
        font-size: 16px;
    }

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

    .hero-stats {
        flex-direction: column;
        gap: 24px;
    }

    .section-header h2 {
        font-size: 28px;
    }

    .filters {
        flex-direction: column;
        align-items: stretch;
    }

    .filter-group {
        flex-direction: column;
        align-items: stretch;
    }

    .filter-group select {
        width: 100%;
    }

    .view-toggle {
        margin-left: 0;
        justify-content: center;
    }

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

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

    .footer-content {
        grid-template-columns: 1fr;
        gap: 32px;
    }

    .quiz-container {
        padding: 24px;
    }
}

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

.product-card {
    animation: fadeInUp 0.5s ease forwards;
}

.product-card:nth-child(1) { animation-delay: 0.1s; }
.product-card:nth-child(2) { animation-delay: 0.2s; }
.product-card:nth-child(3) { animation-delay: 0.3s; }
.product-card:nth-child(4) { animation-delay: 0.4s; }
.product-card:nth-child(5) { animation-delay: 0.5s; }
.product-card:nth-child(6) { animation-delay: 0.6s; }

/* Utility Classes */
.text-center { text-align: center; }
.mt-4 { margin-top: 16px; }
.mt-8 { margin-top: 32px; }
.mb-4 { margin-bottom: 16px; }
.mb-8 { margin-bottom: 32px; }

/* No results */
.no-results {
    text-align: center;
    padding: 60px 20px;
    color: var(--gray-500);
}

.no-results h3 {
    color: var(--gray-600);
    margin-bottom: 8px;
}