/* CSS Reset & Variables */
:root {
    --primary: #6366f1;
    --primary-dark: #4f46e5;
    --primary-light: #818cf8;
    --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-lg: 16px;
    --transition: all 0.3s ease;
}

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

html {
    scroll-behavior: smooth;
}

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

/* Container */
.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 24px;
}

/* Header */
.header {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 1000;
    background: rgba(255, 255, 255, 0.9);
    backdrop-filter: blur(10px);
    border-bottom: 1px solid transparent;
    transition: var(--transition);
}

.header.scrolled {
    border-bottom-color: var(--border);
    box-shadow: var(--shadow);
}

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

.logo {
    display: flex;
    align-items: center;
    gap: 8px;
    text-decoration: none;
    color: var(--text);
}

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

.logo-text {
    font-size: 20px;
    font-weight: 700;
}

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

.nav-links {
    display: flex;
    list-style: none;
    gap: 32px;
}

.nav-links a {
    text-decoration: none;
    color: var(--text-light);
    font-weight: 500;
    font-size: 15px;
    transition: var(--transition);
}

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

/* Mobile Menu */
.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);
}

.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 Section */
.hero {
    padding: 140px 0 80px;
    background: linear-gradient(135deg, var(--bg) 0%, var(--bg-alt) 100%);
}

.hero-content {
    text-align: center;
    max-width: 720px;
    margin: 0 auto 48px;
}

.hero h1 {
    font-size: clamp(2.5rem, 5vw, 3.5rem);
    font-weight: 800;
    line-height: 1.1;
    margin-bottom: 20px;
    color: var(--secondary);
}

.hero .highlight {
    background: linear-gradient(135deg, var(--primary) 0%, var(--primary-light) 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.hero-subtitle {
    font-size: 1.25rem;
    color: var(--text-light);
    margin-bottom: 32px;
    line-height: 1.7;
}

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

.stat {
    text-align: center;
}

.stat-number {
    display: block;
    font-size: 2rem;
    font-weight: 800;
    color: var(--primary);
}

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

/* Buttons */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: 14px 28px;
    font-size: 15px;
    font-weight: 600;
    text-decoration: none;
    border-radius: var(--radius);
    transition: var(--transition);
    cursor: pointer;
    border: none;
}

.btn-primary {
    background: linear-gradient(135deg, var(--primary) 0%, var(--primary-dark) 100%);
    color: white;
    box-shadow: 0 4px 14px rgba(99, 102, 241, 0.4);
}

.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 6px 20px rgba(99, 102, 241, 0.5);
}

.btn-secondary {
    background: var(--secondary);
    color: white;
    padding: 12px 20px;
    font-size: 14px;
}

.btn-secondary:hover {
    background: #1e293b;
    transform: translateY(-1px);
}

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

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

.section-header {
    text-align: center;
    max-width: 600px;
    margin: 0 auto 48px;
}

.section-header h2 {
    font-size: 2rem;
    font-weight: 700;
    margin-bottom: 12px;
    color: var(--secondary);
}

.section-header p {
    color: var(--text-light);
    font-size: 1.1rem;
}

/* Products Grid */
.products-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(320px, 1fr));
    gap: 24px;
}

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

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

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

.featured-card {
    border: 2px solid var(--border);
}

.featured-card:hover {
    border-color: var(--primary-light);
}

.product-badge {
    position: absolute;
    top: 16px;
    left: 16px;
    background: var(--primary);
    color: white;
    padding: 6px 12px;
    border-radius: 20px;
    font-size: 12px;
    font-weight: 600;
    z-index: 10;
}

.product-badge.premium {
    background: linear-gradient(135deg, #f59e0b 0%, #d97706 100%);
}

.product-badge.comfort {
    background: linear-gradient(135deg, #10b981 0%, #059669 100%);
}

.product-badge.value {
    background: linear-gradient(135deg, #06b6d4 0%, #0891b2 100%);
}

.product-badge.gaming {
    background: linear-gradient(135deg, #ef4444 0%, #dc2626 100%);
}

.product-badge.budget {
    background: linear-gradient(135deg, #8b5cf6 0%, #7c3aed 100%);
}

.product-image {
    background: linear-gradient(135deg, var(--bg-alt) 0%, #e2e8f0 100%);
    padding: 40px;
    display: flex;
    align-items: center;
    justify-content: center;
}

.product-placeholder {
    width: 160px;
    height: 160px;
    background: white;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 64px;
    box-shadow: var(--shadow-lg);
}

.product-content {
    padding: 24px;
}

.product-content h3 {
    font-size: 1.25rem;
    font-weight: 700;
    margin-bottom: 8px;
    color: var(--secondary);
}

.product-rating {
    display: flex;
    align-items: center;
    gap: 8px;
    margin-bottom: 12px;
}

.stars {
    color: var(--accent);
    font-size: 14px;
    letter-spacing: 2px;
}

.rating-text {
    font-size: 13px;
    color: var(--text-light);
    font-weight: 500;
}

.product-description {
    color: var(--text-light);
    font-size: 14px;
    line-height: 1.6;
    margin-bottom: 16px;
}

.product-features {
    list-style: none;
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 8px;
    margin-bottom: 20px;
}

.product-features li {
    font-size: 13px;
    color: var(--text-light);
    display: flex;
    align-items: center;
    gap: 6px;
}

.product-features li::before {
    content: "✓";
    color: var(--success);
    font-weight: 700;
    font-size: 12px;
}

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

.product-price {
    font-size: 1.25rem;
    font-weight: 700;
    color: var(--secondary);
}

/* Buying Guide */
.buying-guide {
    background: linear-gradient(135deg, var(--secondary) 0%, #1e293b 100%);
    color: white;
}

.buying-guide .section-header h2 {
    color: white;
}

.buying-guide .section-header p {
    color: var(--text-lighter);
}

.guide-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(260px, 1fr));
    gap: 24px;
}

.guide-card {
    background: rgba(255, 255, 255, 0.05);
    border: 1px solid rgba(255, 255, 255, 0.1);
    border-radius: var(--radius-lg);
    padding: 28px;
    transition: var(--transition);
}

.guide-card:hover {
    background: rgba(255, 255, 255, 0.08);
    transform: translateY(-4px);
}

.guide-icon {
    font-size: 40px;
    margin-bottom: 16px;
}

.guide-card h3 {
    font-size: 1.1rem;
    font-weight: 600;
    margin-bottom: 12px;
}

.guide-card p {
    font-size: 14px;
    color: var(--text-lighter);
    line-height: 1.7;
}

/* Comparison Table */
.comparison-table-wrapper {
    overflow-x: auto;
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-lg);
}

.comparison-table {
    width: 100%;
    border-collapse: collapse;
    background: var(--bg);
    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: 14px;
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

.comparison-table th:first-child {
    border-radius: var(--radius-lg) 0 0 0;
}

.comparison-table th:last-child {
    border-radius: 0 var(--radius-lg) 0 0;
}

.comparison-table td {
    font-size: 14px;
    color: var(--text);
}

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

.comparison-table tbody tr:last-child td:first-child {
    border-radius: 0 0 0 var(--radius-lg);
}

.comparison-table tbody tr:last-child td:last-child {
    border-radius: 0 0 var(--radius-lg) 0;
}

.comparison-table .stars {
    color: var(--accent);
    letter-spacing: 1px;
}

.btn-sm {
    padding: 8px 16px;
    font-size: 12px;
}

/* SEO Content Section */
.seo-content {
    background: var(--bg-alt);
    padding: 60px 0;
}

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

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

.seo-text p {
    color: var(--text-light);
    font-size: 15px;
    line-height: 1.8;
    margin-bottom: 20px;
}

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

/* Footer */
.footer {
    background: var(--bg-dark);
    color: white;
    padding: 60px 0 24px;
}

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

.footer-brand p {
    color: var(--text-lighter);
    font-size: 14px;
    margin-top: 16px;
    line-height: 1.7;
}

.footer-links {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 32px;
}

.footer-column h4 {
    font-size: 14px;
    font-weight: 600;
    margin-bottom: 16px;
    color: white;
}

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

.footer-column li {
    margin-bottom: 10px;
}

.footer-column a {
    color: var(--text-lighter);
    text-decoration: none;
    font-size: 14px;
    transition: var(--transition);
}

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

.footer-bottom {
    padding-top: 24px;
    border-top: 1px solid rgba(255, 255, 255, 0.1);
    text-align: center;
}

.footer-bottom p {
    font-size: 13px;
    color: var(--text-lighter);
    margin-bottom: 8px;
}

.affiliate-disclosure {
    font-size: 12px !important;
    color: var(--text-light) !important;
    opacity: 0.7;
}

/* Responsive Design */
@media (max-width: 768px) {
    .nav-links {
        position: absolute;
        top: 72px;
        left: 0;
        right: 0;
        background: white;
        flex-direction: column;
        padding: 24px;
        gap: 16px;
        border-bottom: 1px solid var(--border);
        display: none;
        box-shadow: var(--shadow-lg);
    }

    .nav-links.active {
        display: flex;
    }

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

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

    .hero h1 {
        font-size: 2rem;
    }

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

    .hero-stats {
        gap: 24px;
    }

    .stat-number {
        font-size: 1.5rem;
    }

    .section {
        padding: 60px 0;
    }

    .section-header h2 {
        font-size: 1.5rem;
    }

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

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

    .product-features {
        grid-template-columns: 1fr;
    }

    .product-footer {
        flex-direction: column;
        gap: 16px;
        align-items: stretch;
    }

    .product-footer .btn {
        text-align: center;
    }

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

    .comparison-table {
        min-width: 100%;
    }

    .comparison-table thead {
        display: none;
    }

    .comparison-table tbody tr {
        display: block;
        padding: 16px;
        margin-bottom: 16px;
        border: 1px solid var(--border);
        border-radius: var(--radius);
    }

    .comparison-table td {
        display: flex;
        justify-content: space-between;
        padding: 8px 0;
        border-bottom: 1px solid var(--border);
    }

    .comparison-table td:last-child {
        border-bottom: none;
        justify-content: center;
        padding-top: 16px;
    }

    .comparison-table td::before {
        content: attr(data-label);
        font-weight: 600;
        color: var(--text-light);
    }

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

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

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

    .hero h1 {
        font-size: 1.75rem;
    }

    .product-placeholder {
        width: 120px;
        height: 120px;
        font-size: 48px;
    }

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

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

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

/* Accessibility */
@media (prefers-reduced-motion: reduce) {
    *, *::before, *::after {
        animation-duration: 0.01ms !important;
        animation-iteration-count: 1 !important;
        transition-duration: 0.01ms !important;
    }

    html {
        scroll-behavior: auto;
    }
}

/* Focus styles */
a:focus-visible,
button:focus-visible {
    outline: 2px solid var(--primary);
    outline-offset: 2px;
}

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