/* CSS Variables */
:root {
    --primary: #10b981;
    --primary-dark: #059669;
    --primary-light: #34d399;
    --secondary: #1e293b;
    --secondary-light: #334155;
    --accent: #f59e0b;
    --accent-dark: #d97706;
    --background: #f8fafc;
    --surface: #ffffff;
    --surface-alt: #f1f5f9;
    --text: #1e293b;
    --text-muted: #64748b;
    --text-light: #94a3b8;
    --border: #e2e8f0;
    --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;
    --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: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen, Ubuntu, sans-serif;
    background: var(--background);
    color: var(--text);
    line-height: 1.6;
    font-size: 16px;
}

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

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

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

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

/* Buttons */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    padding: 12px 24px;
    font-size: 1rem;
    font-weight: 600;
    border-radius: var(--radius);
    border: 2px solid transparent;
    cursor: pointer;
    transition: var(--transition);
    text-decoration: none;
}

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

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

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

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

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

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

.btn-amazon {
    background: #ff9900;
    color: #111;
    border-color: #ff9900;
    font-weight: 700;
}

.btn-amazon:hover {
    background: #e88b00;
    border-color: #e88b00;
    color: #111;
    transform: translateY(-2px);
    box-shadow: var(--shadow-lg);
}

.btn:disabled {
    opacity: 0.5;
    cursor: not-allowed;
    transform: none !important;
}

.btn-sm {
    padding: 8px 16px;
    font-size: 0.875rem;
}

/* Header */
.header {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    background: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(10px);
    border-bottom: 1px solid var(--border);
    z-index: 1000;
    padding: 16px 0;
}

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

.logo {
    display: flex;
    align-items: center;
    gap: 8px;
    font-size: 1.25rem;
    font-weight: 700;
    color: var(--text);
}

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

.logo-icon {
    font-size: 1.5rem;
}

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

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

.nav-link {
    color: var(--text);
    font-weight: 500;
    padding: 8px 0;
    position: relative;
}

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

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

.nav-link: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 {
    width: 24px;
    height: 2px;
    background: var(--text);
    transition: var(--transition);
}

.mobile-nav {
    display: none;
    position: fixed;
    top: 70px;
    left: 0;
    right: 0;
    background: var(--surface);
    border-bottom: 1px solid var(--border);
    padding: 20px;
    z-index: 999;
}

.mobile-nav.active {
    display: block;
}

.mobile-nav-list {
    list-style: none;
    display: flex;
    flex-direction: column;
    gap: 16px;
}

.mobile-nav-link {
    color: var(--text);
    font-weight: 500;
    font-size: 1.1rem;
}

/* Hero Section */
.hero {
    position: relative;
    padding: 140px 0 80px;
    overflow: hidden;
    background: linear-gradient(135deg, #f0fdf4 0%, #ecfeff 50%, #f0f9ff 100%);
}

.hero-bg {
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background-image:
        radial-gradient(circle at 20% 50%, rgba(16, 185, 129, 0.1) 0%, transparent 50%),
        radial-gradient(circle at 80% 20%, rgba(6, 182, 212, 0.1) 0%, transparent 50%),
        radial-gradient(circle at 40% 80%, rgba(245, 158, 11, 0.05) 0%, transparent 50%);
    pointer-events: none;
}

.hero-content {
    position: relative;
    max-width: 700px;
    text-align: center;
    margin: 0 auto;
}

.hero-badge {
    display: inline-block;
    background: white;
    color: var(--primary);
    padding: 8px 16px;
    border-radius: 50px;
    font-size: 0.875rem;
    font-weight: 600;
    margin-bottom: 24px;
    box-shadow: var(--shadow);
}

.hero h1 {
    font-size: 3.5rem;
    font-weight: 800;
    line-height: 1.1;
    margin-bottom: 24px;
    color: var(--text);
}

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

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

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

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

.stat {
    text-align: center;
}

.stat-number {
    display: block;
    font-size: 2rem;
    font-weight: 700;
    color: var(--primary);
}

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

/* Info Bar */
.info-bar {
    background: var(--secondary);
    padding: 16px 0;
}

.info-items {
    display: flex;
    justify-content: center;
    flex-wrap: wrap;
    gap: 24px 48px;
}

.info-item {
    display: flex;
    align-items: center;
    gap: 8px;
    color: white;
    font-size: 0.9rem;
}

.info-icon {
    color: var(--primary-light);
    font-weight: bold;
}

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

.section-header h2 {
    font-size: 2.5rem;
    font-weight: 700;
    margin-bottom: 12px;
    color: var(--text);
}

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

/* Products Section */
.products-section {
    padding: 80px 0;
}

.view-controls {
    display: flex;
    justify-content: space-between;
    align-items: center;
    flex-wrap: wrap;
    gap: 16px;
    margin-bottom: 32px;
    padding: 16px 24px;
    background: var(--surface);
    border-radius: var(--radius);
    box-shadow: var(--shadow);
}

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

.filter-group label {
    font-weight: 500;
    color: var(--text-muted);
    font-size: 0.9rem;
}

.filter-select {
    padding: 8px 16px;
    border: 1px solid var(--border);
    border-radius: var(--radius-sm);
    font-size: 0.9rem;
    background: white;
    cursor: pointer;
}

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

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

.view-btn {
    padding: 8px 12px;
    background: var(--surface-alt);
    border: 1px solid var(--border);
    border-radius: var(--radius-sm);
    cursor: pointer;
    color: var(--text-muted);
    transition: var(--transition);
}

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

/* Products Grid */
.products-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
    gap: 24px;
}

.product-card {
    background: var(--surface);
    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);
}

.product-badge {
    position: absolute;
    top: 16px;
    left: 16px;
    background: var(--accent);
    color: white;
    padding: 4px 12px;
    border-radius: 50px;
    font-size: 0.75rem;
    font-weight: 600;
    z-index: 1;
}

.product-compare {
    position: absolute;
    top: 16px;
    right: 16px;
    z-index: 1;
}

.compare-checkbox {
    width: 20px;
    height: 20px;
    cursor: pointer;
    accent-color: var(--primary);
}

.product-image {
    height: 180px;
    background: linear-gradient(135deg, var(--surface-alt) 0%, #e2e8f0 100%);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 4rem;
}

.product-content {
    padding: 20px;
}

.product-brand {
    font-size: 0.75rem;
    font-weight: 600;
    color: var(--primary);
    text-transform: uppercase;
    letter-spacing: 0.5px;
    margin-bottom: 4px;
}

.product-name {
    font-size: 1.1rem;
    font-weight: 600;
    margin-bottom: 8px;
    color: var(--text);
}

.product-meta {
    display: flex;
    gap: 12px;
    margin-bottom: 12px;
    flex-wrap: wrap;
}

.product-tag {
    display: inline-flex;
    align-items: center;
    gap: 4px;
    padding: 4px 8px;
    background: var(--surface-alt);
    border-radius: 50px;
    font-size: 0.75rem;
    color: var(--text-muted);
}

.product-rating {
    display: flex;
    align-items: center;
    gap: 4px;
    margin-bottom: 16px;
}

.stars {
    color: var(--accent);
    font-size: 0.875rem;
}

.rating-count {
    font-size: 0.8rem;
    color: var(--text-muted);
}

.product-footer {
    display: flex;
    gap: 8px;
}

.product-footer .btn {
    flex: 1;
}

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

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

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

.products-table th {
    background: var(--surface-alt);
    font-weight: 600;
    font-size: 0.875rem;
    color: var(--text-muted);
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

.products-table tr:hover {
    background: var(--surface-alt);
}

.products-table .brand-cell {
    font-weight: 600;
    color: var(--primary);
}

.hidden {
    display: none !important;
}

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

.compare-selection {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 24px;
}

.compare-slots {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 16px;
    width: 100%;
    max-width: 800px;
}

.compare-slot {
    background: var(--surface);
    border: 2px dashed var(--border);
    border-radius: var(--radius);
    padding: 24px;
    min-height: 120px;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    transition: var(--transition);
}

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

.compare-slot.filled {
    border-style: solid;
    border-color: var(--primary);
}

.slot-placeholder {
    color: var(--text-muted);
    font-size: 0.9rem;
}

.slot-product {
    text-align: center;
}

.slot-product-name {
    font-weight: 600;
    font-size: 0.9rem;
    margin-bottom: 4px;
}

.slot-product-brand {
    font-size: 0.75rem;
    color: var(--primary);
}

.slot-remove {
    margin-top: 8px;
    font-size: 0.75rem;
    color: var(--text-muted);
    cursor: pointer;
}

.slot-remove:hover {
    color: #ef4444;
}

.comparison-result {
    margin-top: 48px;
    overflow-x: auto;
}

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

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

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

.comparison-table th:first-child {
    background: var(--secondary);
    text-align: left;
}

.comparison-table td:first-child {
    background: var(--surface-alt);
    font-weight: 500;
    text-align: left;
}

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

/* Quiz Section */
.quiz-section {
    padding: 80px 0;
}

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

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

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

.progress-fill {
    height: 100%;
    background: linear-gradient(90deg, var(--primary), var(--primary-light));
    border-radius: 50px;
    transition: width 0.3s ease;
    width: 20%;
}

.progress-text {
    font-size: 0.875rem;
    color: var(--text-muted);
}

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

.quiz-question {
    font-size: 1.5rem;
    font-weight: 600;
    margin-bottom: 24px;
    color: var(--text);
}

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

.quiz-option {
    display: flex;
    align-items: center;
    gap: 12px;
    padding: 16px 20px;
    background: var(--surface-alt);
    border: 2px solid transparent;
    border-radius: var(--radius);
    cursor: pointer;
    transition: var(--transition);
}

.quiz-option:hover {
    border-color: var(--primary-light);
    background: white;
}

.quiz-option.selected {
    border-color: var(--primary);
    background: #f0fdf4;
}

.quiz-option input {
    display: none;
}

.quiz-option-radio {
    width: 20px;
    height: 20px;
    border: 2px solid var(--border);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: var(--transition);
}

.quiz-option.selected .quiz-option-radio {
    border-color: var(--primary);
}

.quiz-option.selected .quiz-option-radio::after {
    content: '';
    width: 10px;
    height: 10px;
    background: var(--primary);
    border-radius: 50%;
}

.quiz-option-text {
    flex: 1;
    font-weight: 500;
}

.quiz-navigation {
    display: flex;
    gap: 16px;
    justify-content: center;
}

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

.quiz-result h3 {
    font-size: 1.75rem;
    margin-bottom: 16px;
    color: var(--text);
}

.quiz-result p {
    color: var(--text-muted);
    margin-bottom: 32px;
}

.quiz-recommendations {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 16px;
    margin-bottom: 24px;
}

.quiz-recommendation {
    background: var(--surface-alt);
    border-radius: var(--radius);
    padding: 20px;
    text-align: center;
}

.quiz-recommendation-icon {
    font-size: 2.5rem;
    margin-bottom: 12px;
}

.quiz-recommendation-name {
    font-weight: 600;
    margin-bottom: 4px;
}

.quiz-recommendation-brand {
    font-size: 0.875rem;
    color: var(--primary);
    margin-bottom: 12px;
}

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

.guide-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
    gap: 24px;
}

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

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

.guide-icon {
    font-size: 2.5rem;
    margin-bottom: 16px;
}

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

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

/* FAQ Section */
.faq-section {
    padding: 80px 0;
}

.faq-list {
    max-width: 800px;
    margin: 0 auto;
}

.faq-item {
    background: var(--surface);
    border-radius: var(--radius);
    margin-bottom: 16px;
    box-shadow: var(--shadow);
    overflow: hidden;
}

.faq-question {
    padding: 20px 24px;
    font-weight: 600;
    cursor: pointer;
    display: flex;
    justify-content: space-between;
    align-items: center;
    list-style: none;
}

.faq-question::-webkit-details-marker {
    display: none;
}

.faq-question::after {
    content: '+';
    font-size: 1.5rem;
    color: var(--primary);
    transition: var(--transition);
}

.faq-item[open] .faq-question::after {
    transform: rotate(45deg);
}

.faq-answer {
    padding: 0 24px 20px;
    color: var(--text-muted);
    line-height: 1.7;
}

/* SEO Section */
.seo-section {
    padding: 80px 0;
    background: linear-gradient(to bottom, var(--surface-alt), var(--surface));
}

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

.seo-content h2 {
    font-size: 2rem;
    margin-bottom: 24px;
    color: var(--text);
}

.seo-content h3 {
    font-size: 1.4rem;
    margin: 32px 0 16px;
    color: var(--text);
}

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

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

.seo-content strong {
    color: var(--text);
}

.seo-content em {
    font-size: 0.9rem;
}

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

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

.footer-brand .logo {
    margin-bottom: 16px;
}

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

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

.footer-links h4 {
    font-size: 1rem;
    margin-bottom: 16px;
    color: white;
}

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

.footer-links li {
    margin-bottom: 8px;
}

.footer-links a {
    color: var(--text-light);
    font-size: 0.9rem;
    transition: var(--transition);
}

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

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

.footer-bottom p {
    color: var(--text-light);
    font-size: 0.875rem;
    margin-bottom: 8px;
}

.disclaimer,
.affiliate-disclosure {
    font-size: 0.8rem !important;
    opacity: 0.8;
}

/* Compare Toast */
.compare-toast {
    position: fixed;
    bottom: 24px;
    left: 50%;
    transform: translateX(-50%);
    background: var(--secondary);
    color: white;
    padding: 16px 24px;
    border-radius: var(--radius);
    display: flex;
    align-items: center;
    gap: 16px;
    box-shadow: var(--shadow-xl);
    z-index: 1000;
    animation: slideUp 0.3s ease;
}

@keyframes slideUp {
    from {
        transform: translateX(-50%) translateY(100%);
        opacity: 0;
    }
    to {
        transform: translateX(-50%) translateY(0);
        opacity: 1;
    }
}

.toast-message {
    font-size: 0.9rem;
}

.toast-link {
    color: var(--primary-light);
    font-weight: 600;
}

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

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

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

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

    .hero h1 {
        font-size: 2.5rem;
    }

    .hero-subtitle {
        font-size: 1.1rem;
    }

    .hero-stats {
        gap: 24px;
    }

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

    .section-header h2 {
        font-size: 2rem;
    }

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

    .quiz-container {
        padding: 24px;
    }

    .quiz-question {
        font-size: 1.25rem;
    }

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

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

    .filter-group {
        width: 100%;
    }

    .filter-select {
        flex: 1;
    }

    .view-toggle {
        justify-content: center;
    }
}

@media (max-width: 480px) {
    .hero h1 {
        font-size: 2rem;
    }

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

    .hero-cta .btn {
        width: 100%;
    }

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

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

    .quiz-navigation {
        flex-direction: column;
    }

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

/* Utility Classes */
.text-center {
    text-align: center;
}

.mt-4 {
    margin-top: 16px;
}

.mb-4 {
    margin-bottom: 16px;
}

/* Strength Indicator */
.strength-indicator {
    display: flex;
    gap: 4px;
    align-items: center;
}

.strength-bar {
    width: 8px;
    height: 16px;
    background: var(--border);
    border-radius: 2px;
}

.strength-bar.active {
    background: var(--primary);
}

.strength-bar.strong {
    background: var(--accent);
}

.strength-bar.extra {
    background: #ef4444;
}

/* Add to Compare animation */
@keyframes pulse {
    0% { transform: scale(1); }
    50% { transform: scale(1.1); }
    100% { transform: scale(1); }
}

.pulse {
    animation: pulse 0.3s ease;
}