/* CSS Variables */
:root {
    --primary: #2563eb;
    --primary-dark: #1d4ed8;
    --primary-light: #3b82f6;
    --secondary: #10b981;
    --secondary-dark: #059669;
    --accent: #f59e0b;
    --dark: #1e293b;
    --dark-light: #334155;
    --gray: #64748b;
    --gray-light: #94a3b8;
    --gray-lighter: #e2e8f0;
    --white: #ffffff;
    --background: #f8fafc;
    --card-bg: #ffffff;
    --shadow: 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);
    --radius: 12px;
    --radius-sm: 8px;
    --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;
    font-size: 16px;
    line-height: 1.6;
    color: var(--dark);
    background-color: var(--background);
}

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 20px;
}

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

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

/* Header */
.header {
    background: var(--white);
    box-shadow: var(--shadow);
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 1000;
}

.header-content {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 15px 0;
}

.logo {
    display: flex;
    align-items: center;
    gap: 8px;
    font-size: 1.5rem;
    font-weight: 700;
}

.logo-icon {
    font-size: 1.8rem;
}

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

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

.nav {
    display: flex;
    gap: 30px;
}

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

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

.nav a::after {
    content: '';
    position: absolute;
    bottom: -5px;
    left: 0;
    width: 0;
    height: 2px;
    background: var(--primary);
    transition: var(--transition);
}

.nav a: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 {
    width: 25px;
    height: 3px;
    background: var(--dark);
    border-radius: 3px;
    transition: var(--transition);
}

/* Hero Section */
.hero {
    background: linear-gradient(135deg, var(--primary) 0%, var(--primary-dark) 100%);
    padding: 140px 0 80px;
    color: var(--white);
}

.hero-content {
    max-width: 700px;
}

.hero h1 {
    font-size: 2.75rem;
    font-weight: 700;
    line-height: 1.2;
    margin-bottom: 20px;
}

.hero p {
    font-size: 1.2rem;
    opacity: 0.9;
    margin-bottom: 30px;
}

.hero-buttons {
    display: flex;
    gap: 15px;
    margin-bottom: 40px;
}

.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: 14px 28px;
    font-size: 1rem;
    font-weight: 600;
    border-radius: var(--radius);
    cursor: pointer;
    transition: var(--transition);
    border: none;
}

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

.btn-primary:hover {
    background: var(--gray-lighter);
    transform: translateY(-2px);
}

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

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

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

.btn-accent:hover {
    background: #d97706;
    transform: translateY(-2px);
}

.hero-stats {
    display: flex;
    gap: 40px;
}

.stat {
    display: flex;
    flex-direction: column;
}

.stat-number {
    font-size: 1.75rem;
    font-weight: 700;
}

.stat-label {
    font-size: 0.9rem;
    opacity: 0.8;
}

/* Section Styles */
.section-header {
    text-align: center;
    margin-bottom: 50px;
}

.section-header h2 {
    font-size: 2.25rem;
    font-weight: 700;
    color: var(--dark);
    margin-bottom: 15px;
}

.section-header p {
    font-size: 1.1rem;
    color: var(--gray);
    max-width: 600px;
    margin: 0 auto;
}

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

.filter-bar {
    display: flex;
    justify-content: center;
    gap: 10px;
    margin-bottom: 40px;
    flex-wrap: wrap;
}

.filter-btn {
    padding: 10px 24px;
    background: var(--gray-lighter);
    border: none;
    border-radius: 50px;
    font-size: 0.95rem;
    font-weight: 500;
    color: var(--gray);
    cursor: pointer;
    transition: var(--transition);
}

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

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

.products-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
    gap: 25px;
}

.product-card {
    background: var(--card-bg);
    border-radius: var(--radius);
    overflow: hidden;
    box-shadow: var(--shadow);
    transition: var(--transition);
    border: 1px solid var(--gray-lighter);
}

.product-card:hover {
    transform: translateY(-5px);
    box-shadow: var(--shadow-xl);
}

.product-image {
    height: 200px;
    background: var(--background);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 4rem;
    position: relative;
}

.product-badge {
    position: absolute;
    top: 15px;
    left: 15px;
    padding: 5px 12px;
    background: var(--secondary);
    color: var(--white);
    font-size: 0.75rem;
    font-weight: 600;
    border-radius: 50px;
    text-transform: uppercase;
}

.product-badge.premium {
    background: var(--accent);
}

.product-content {
    padding: 20px;
}

.product-brand {
    font-size: 0.85rem;
    color: var(--gray);
    text-transform: uppercase;
    letter-spacing: 0.5px;
    margin-bottom: 5px;
}

.product-name {
    font-size: 1.1rem;
    font-weight: 600;
    color: var(--dark);
    margin-bottom: 10px;
    line-height: 1.4;
}

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

.stars {
    color: var(--accent);
    font-size: 0.95rem;
}

.rating-text {
    font-size: 0.85rem;
    color: var(--gray);
}

.product-features {
    list-style: none;
    margin-bottom: 15px;
}

.product-features li {
    font-size: 0.9rem;
    color: var(--gray);
    padding: 4px 0;
    display: flex;
    align-items: center;
    gap: 8px;
}

.product-features li::before {
    content: '✓';
    color: var(--secondary);
    font-weight: bold;
}

.product-footer {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding-top: 15px;
    border-top: 1px solid var(--gray-lighter);
}

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

.product-btn {
    padding: 10px 20px;
    background: var(--primary);
    color: var(--white);
    border: none;
    border-radius: var(--radius-sm);
    font-size: 0.9rem;
    font-weight: 600;
    cursor: pointer;
    transition: var(--transition);
}

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

/* Quiz Section */
.quiz-section {
    padding: 80px 0;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
}

.quiz-section .section-header h2,
.quiz-section .section-header p {
    color: var(--white);
}

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

.quiz-progress {
    margin-bottom: 30px;
}

.progress-bar {
    height: 8px;
    background: var(--gray-lighter);
    border-radius: 50px;
    overflow: hidden;
    margin-bottom: 10px;
}

.progress-fill {
    height: 100%;
    background: linear-gradient(90deg, var(--primary), var(--secondary));
    border-radius: 50px;
    transition: width 0.5s ease;
    width: 25%;
}

.progress-text {
    font-size: 0.9rem;
    color: var(--gray);
}

.quiz-question {
    margin-bottom: 25px;
}

.quiz-question h3 {
    font-size: 1.3rem;
    font-weight: 600;
    color: var(--dark);
    margin-bottom: 20px;
}

.quiz-options {
    display: flex;
    flex-direction: column;
    gap: 12px;
}

.quiz-option {
    padding: 16px 20px;
    background: var(--background);
    border: 2px solid var(--gray-lighter);
    border-radius: var(--radius-sm);
    cursor: pointer;
    transition: var(--transition);
    font-size: 1rem;
    text-align: left;
}

.quiz-option:hover {
    border-color: var(--primary);
    background: rgba(37, 99, 235, 0.05);
}

.quiz-option.selected {
    border-color: var(--primary);
    background: rgba(37, 99, 235, 0.1);
}

.quiz-nav {
    display: flex;
    justify-content: space-between;
    margin-top: 30px;
}

.quiz-nav .btn {
    min-width: 120px;
}

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

.result-icon {
    font-size: 4rem;
    margin-bottom: 20px;
}

.result-title {
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--dark);
    margin-bottom: 10px;
}

.result-product {
    background: var(--background);
    border-radius: var(--radius);
    padding: 25px;
    margin: 20px 0;
}

.result-product-name {
    font-size: 1.2rem;
    font-weight: 600;
    color: var(--primary);
    margin-bottom: 10px;
}

.result-product-desc {
    color: var(--gray);
    margin-bottom: 15px;
}

.result-features {
    display: flex;
    flex-wrap: wrap;
    gap: 10px;
    justify-content: center;
    margin-bottom: 20px;
}

.result-feature {
    padding: 6px 14px;
    background: var(--white);
    border-radius: 50px;
    font-size: 0.85rem;
    color: var(--gray);
}

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

.compare-selector {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 20px;
    margin-bottom: 40px;
}

.compare-slot {
    min-height: 200px;
    border: 2px dashed var(--gray-lighter);
    border-radius: var(--radius);
    display: flex;
    align-items: center;
    justify-content: center;
    transition: var(--transition);
}

.compare-slot:hover {
    border-color: var(--primary);
}

.compare-slot.filled {
    border-style: solid;
    border-color: var(--primary);
    padding: 20px;
    flex-direction: column;
    text-align: center;
}

.add-compare-btn {
    padding: 15px 25px;
    background: var(--background);
    border: none;
    border-radius: var(--radius-sm);
    color: var(--gray);
    font-size: 1rem;
    font-weight: 500;
    cursor: pointer;
    transition: var(--transition);
}

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

.compare-product-icon {
    font-size: 3rem;
    margin-bottom: 10px;
}

.compare-product-name {
    font-weight: 600;
    color: var(--dark);
    margin-bottom: 10px;
}

.remove-compare-btn {
    padding: 8px 16px;
    background: #ef4444;
    color: var(--white);
    border: none;
    border-radius: var(--radius-sm);
    font-size: 0.85rem;
    cursor: pointer;
    transition: var(--transition);
}

.remove-compare-btn:hover {
    background: #dc2626;
}

.compare-table-wrapper {
    overflow-x: auto;
    margin-top: 30px;
}

.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: 15px 20px;
    text-align: left;
    border-bottom: 1px solid var(--gray-lighter);
}

.compare-table th {
    background: var(--primary);
    color: var(--white);
    font-weight: 600;
}

.compare-table tr:hover td {
    background: var(--background);
}

.compare-table td:first-child {
    font-weight: 500;
    color: var(--dark);
}

/* Full Table Section */
.table-section {
    padding: 80px 0;
    background: var(--background);
}

.table-wrapper {
    overflow-x: auto;
}

.full-table {
    width: 100%;
    border-collapse: collapse;
    background: var(--white);
    border-radius: var(--radius);
    overflow: hidden;
    box-shadow: var(--shadow);
    min-width: 900px;
}

.full-table th,
.full-table td {
    padding: 15px;
    text-align: left;
    border-bottom: 1px solid var(--gray-lighter);
}

.full-table th {
    background: var(--dark);
    color: var(--white);
    font-weight: 600;
    font-size: 0.9rem;
    white-space: nowrap;
}

.full-table tbody tr:hover {
    background: var(--background);
}

.full-table .product-cell {
    display: flex;
    align-items: center;
    gap: 12px;
}

.full-table .product-icon {
    font-size: 2rem;
}

.full-table .product-info h4 {
    font-size: 0.95rem;
    font-weight: 600;
    color: var(--dark);
    margin-bottom: 3px;
}

.full-table .product-info span {
    font-size: 0.8rem;
    color: var(--gray);
}

.full-table .table-btn {
    padding: 8px 16px;
    background: var(--primary);
    color: var(--white);
    border: none;
    border-radius: var(--radius-sm);
    font-size: 0.85rem;
    font-weight: 500;
    cursor: pointer;
    transition: var(--transition);
    white-space: nowrap;
}

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

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

.guide-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(320px, 1fr));
    gap: 25px;
}

.guide-card {
    background: var(--background);
    padding: 30px;
    border-radius: var(--radius);
    transition: var(--transition);
}

.guide-card:hover {
    transform: translateY(-5px);
    box-shadow: var(--shadow-lg);
}

.guide-icon {
    font-size: 2.5rem;
    margin-bottom: 15px;
}

.guide-card h3 {
    font-size: 1.2rem;
    font-weight: 600;
    color: var(--dark);
    margin-bottom: 10px;
}

.guide-card p {
    color: var(--gray);
    font-size: 0.95rem;
    line-height: 1.7;
}

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

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

.seo-content h2 {
    font-size: 2rem;
    font-weight: 700;
    color: var(--dark);
    margin-bottom: 20px;
}

.seo-content h3 {
    font-size: 1.4rem;
    font-weight: 600;
    color: var(--dark);
    margin: 30px 0 15px;
}

.seo-content p {
    color: var(--gray);
    font-size: 1rem;
    line-height: 1.8;
    margin-bottom: 15px;
}

/* Modal */
.modal {
    display: none;
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: rgba(0, 0, 0, 0.5);
    z-index: 2000;
    align-items: center;
    justify-content: center;
    padding: 20px;
}

.modal.active {
    display: flex;
}

.modal-content {
    background: var(--white);
    border-radius: var(--radius);
    max-width: 500px;
    width: 100%;
    max-height: 80vh;
    overflow: hidden;
    box-shadow: var(--shadow-xl);
}

.modal-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 20px;
    border-bottom: 1px solid var(--gray-lighter);
}

.modal-header h3 {
    font-size: 1.2rem;
    font-weight: 600;
    color: var(--dark);
}

.modal-close {
    background: none;
    border: none;
    font-size: 1.5rem;
    color: var(--gray);
    cursor: pointer;
    transition: var(--transition);
}

.modal-close:hover {
    color: var(--dark);
}

.modal-body {
    padding: 20px;
    max-height: 60vh;
    overflow-y: auto;
}

.modal-product-item {
    display: flex;
    align-items: center;
    gap: 15px;
    padding: 15px;
    border-radius: var(--radius-sm);
    cursor: pointer;
    transition: var(--transition);
    border: 1px solid var(--gray-lighter);
    margin-bottom: 10px;
}

.modal-product-item:hover {
    border-color: var(--primary);
    background: rgba(37, 99, 235, 0.05);
}

.modal-product-icon {
    font-size: 2rem;
}

.modal-product-info h4 {
    font-size: 1rem;
    font-weight: 600;
    color: var(--dark);
}

.modal-product-info span {
    font-size: 0.85rem;
    color: var(--gray);
}

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

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

.footer-brand .logo {
    margin-bottom: 15px;
}

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

.footer-brand p {
    color: var(--gray-light);
    font-size: 0.95rem;
}

.footer-links h4,
.footer-info h4 {
    font-size: 1.1rem;
    font-weight: 600;
    margin-bottom: 20px;
}

.footer-links a {
    display: block;
    color: var(--gray-light);
    padding: 8px 0;
    font-size: 0.95rem;
}

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

.footer-info p {
    color: var(--gray-light);
    font-size: 0.9rem;
    line-height: 1.7;
}

.footer-bottom {
    border-top: 1px solid var(--dark-light);
    padding-top: 30px;
    text-align: center;
}

.footer-bottom p {
    color: var(--gray-light);
    font-size: 0.9rem;
    margin-bottom: 10px;
}

.affiliate-notice {
    font-size: 0.85rem !important;
    opacity: 0.7;
}

/* Responsive Design */
@media (max-width: 992px) {
    .hero h1 {
        font-size: 2.25rem;
    }

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

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

@media (max-width: 768px) {
    .nav {
        display: none;
        position: absolute;
        top: 100%;
        left: 0;
        right: 0;
        background: var(--white);
        flex-direction: column;
        padding: 20px;
        gap: 15px;
        box-shadow: var(--shadow);
    }

    .nav.active {
        display: flex;
    }

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

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

    .hero h1 {
        font-size: 1.9rem;
    }

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

    .hero-buttons {
        flex-direction: column;
    }

    .hero-stats {
        flex-wrap: wrap;
        gap: 20px;
    }

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

    .quiz-container {
        padding: 25px;
    }

    .quiz-question h3 {
        font-size: 1.1rem;
    }

    .filter-bar {
        gap: 8px;
    }

    .filter-btn {
        padding: 8px 16px;
        font-size: 0.85rem;
    }

    .footer-content {
        grid-template-columns: 1fr;
        gap: 30px;
    }

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

@media (max-width: 480px) {
    .container {
        padding: 0 15px;
    }

    .hero h1 {
        font-size: 1.6rem;
    }

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

    .quiz-nav {
        flex-direction: column;
        gap: 10px;
    }

    .quiz-nav .btn {
        width: 100%;
    }
}

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

.product-card {
    animation: fadeIn 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; }
.product-card:nth-child(7) { animation-delay: 0.7s; }
.product-card:nth-child(8) { animation-delay: 0.8s; }