/* CSS Variables */
:root {
    --primary-color: #2563eb;
    --primary-dark: #1d4ed8;
    --primary-light: #3b82f6;
    --secondary-color: #10b981;
    --accent-color: #f59e0b;
    --dark-color: #1e293b;
    --text-color: #334155;
    --text-light: #64748b;
    --bg-color: #f8fafc;
    --white: #ffffff;
    --border-color: #e2e8f0;
    --shadow-sm: 0 1px 2px rgba(0, 0, 0, 0.05);
    --shadow-md: 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-sm: 0.375rem;
    --radius-md: 0.5rem;
    --radius-lg: 1rem;
    --radius-xl: 1.5rem;
    --transition: all 0.3s ease;
}

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

html {
    scroll-behavior: smooth;
    font-size: 16px;
}

body {
    font-family: 'Segoe UI', -apple-system, BlinkMacSystemFont, Roboto, Oxygen, Ubuntu, sans-serif;
    color: var(--text-color);
    background-color: var(--bg-color);
    line-height: 1.6;
    overflow-x: hidden;
}

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

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

ul {
    list-style: none;
}

.container {
    max-width: 1280px;
    margin: 0 auto;
    padding: 0 1.5rem;
}

/* Buttons */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 0.5rem;
    padding: 0.875rem 1.75rem;
    font-size: 1rem;
    font-weight: 600;
    border-radius: var(--radius-md);
    border: none;
    cursor: pointer;
    transition: var(--transition);
    text-align: center;
}

.btn-primary {
    background: linear-gradient(135deg, var(--primary-color), var(--primary-dark));
    color: var(--white);
    box-shadow: var(--shadow-md);
}

.btn-primary:hover {
    background: linear-gradient(135deg, var(--primary-dark), var(--primary-color));
    transform: translateY(-2px);
    box-shadow: var(--shadow-lg);
}

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

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

.btn-outline {
    background: transparent;
    color: var(--primary-color);
    border: 2px solid var(--primary-color);
    padding: 0.75rem 2rem;
}

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

.btn-buy {
    background: linear-gradient(135deg, var(--secondary-color), #059669);
    color: var(--white);
    width: 100%;
    padding: 1rem;
    font-size: 1rem;
    box-shadow: var(--shadow-md);
}

.btn-buy:hover {
    background: linear-gradient(135deg, #059669, var(--secondary-color));
    transform: translateY(-2px);
    box-shadow: var(--shadow-lg);
}

.btn-sm {
    padding: 0.5rem 1rem;
    font-size: 0.875rem;
    background: var(--primary-color);
    color: var(--white);
    border-radius: var(--radius-sm);
}

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

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

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

.logo {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--dark-color);
}

.logo-icon {
    font-size: 2rem;
}

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

.nav-list {
    display: flex;
    align-items: center;
    gap: 2rem;
}

.nav-link {
    font-weight: 500;
    color: var(--text-color);
    padding: 0.5rem;
    position: relative;
}

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

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

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

.mobile-menu-btn {
    display: none;
    flex-direction: column;
    gap: 5px;
    background: none;
    border: none;
    cursor: pointer;
    padding: 0.5rem;
}

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

/* Hero Section */
.hero {
    position: relative;
    min-height: 100vh;
    display: flex;
    align-items: center;
    padding-top: 80px;
    overflow: hidden;
}

.hero-bg {
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: linear-gradient(135deg, #1e3a5f 0%, #2563eb 50%, #3b82f6 100%);
    z-index: -1;
}

.hero-bg::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='0.05'%3E%3Ccircle cx='30' cy='30' r='2'/%3E%3C/g%3E%3C/g%3E%3C/svg%3E");
}

.hero-content {
    text-align: center;
    color: var(--white);
    max-width: 800px;
    margin: 0 auto;
    padding: 2rem 1rem;
}

.hero-title {
    font-size: clamp(2.5rem, 5vw, 4rem);
    font-weight: 800;
    line-height: 1.2;
    margin-bottom: 1.5rem;
}

.hero-title .highlight {
    background: linear-gradient(135deg, #fbbf24, #f59e0b);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.hero-subtitle {
    font-size: 1.25rem;
    opacity: 0.9;
    margin-bottom: 2rem;
    max-width: 600px;
    margin-left: auto;
    margin-right: auto;
}

.hero-cta {
    display: flex;
    gap: 1rem;
    justify-content: center;
    flex-wrap: wrap;
    margin-bottom: 3rem;
}

.hero-stats {
    display: flex;
    justify-content: center;
    gap: 3rem;
    flex-wrap: wrap;
}

.stat {
    text-align: center;
}

.stat-number {
    display: block;
    font-size: 2.5rem;
    font-weight: 700;
}

.stat-label {
    font-size: 0.875rem;
    opacity: 0.8;
}

/* Categories */
.categories {
    background: var(--white);
    padding: 2rem 0;
    border-bottom: 1px solid var(--border-color);
    position: sticky;
    top: 70px;
    z-index: 100;
}

.category-filters {
    display: flex;
    gap: 0.75rem;
    justify-content: center;
    flex-wrap: wrap;
}

.filter-btn {
    padding: 0.75rem 1.5rem;
    font-size: 0.9375rem;
    font-weight: 500;
    background: var(--bg-color);
    border: 1px solid var(--border-color);
    border-radius: 50px;
    cursor: pointer;
    transition: var(--transition);
}

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

/* Products Section */
.products {
    padding: 5rem 0;
}

.section-header {
    text-align: center;
    margin-bottom: 3rem;
}

.section-title {
    font-size: 2.5rem;
    font-weight: 700;
    color: var(--dark-color);
    margin-bottom: 0.75rem;
}

.section-subtitle {
    font-size: 1.125rem;
    color: var(--text-light);
}

.products-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
    gap: 2rem;
}

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

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

.product-badge {
    position: absolute;
    top: 1rem;
    left: 1rem;
    padding: 0.375rem 0.875rem;
    font-size: 0.75rem;
    font-weight: 600;
    text-transform: uppercase;
    background: var(--primary-color);
    color: var(--white);
    border-radius: 50px;
    z-index: 10;
}

.product-badge.bestseller {
    background: linear-gradient(135deg, #f59e0b, #d97706);
}

.product-badge.editors-choice {
    background: linear-gradient(135deg, #8b5cf6, #7c3aed);
}

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

.product-image {
    height: 200px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: linear-gradient(135deg, #f1f5f9, #e2e8f0);
}

.product-placeholder {
    width: 120px;
    height: 120px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 3rem;
}

.product-placeholder.dyson-v15 { background: linear-gradient(135deg, #6366f1, #4f46e5); }
.product-placeholder.roborock { background: linear-gradient(135deg, #f43f5e, #e11d48); }
.product-placeholder.miele { background: linear-gradient(135deg, #ef4444, #dc2626); }
.product-placeholder.shark { background: linear-gradient(135deg, #14b8a6, #0d9488); }
.product-placeholder.roomba { background: linear-gradient(135deg, #22c55e, #16a34a); }
.product-placeholder.dyson-handheld { background: linear-gradient(135deg, #a855f7, #9333ea); }
.product-placeholder.samsung { background: linear-gradient(135deg, #3b82f6, #2563eb); }
.product-placeholder.ecovacs { background: linear-gradient(135deg, #06b6d4, #0891b2); }

.product-content {
    padding: 1.5rem;
}

.product-category {
    font-size: 0.75rem;
    font-weight: 600;
    text-transform: uppercase;
    color: var(--primary-color);
    letter-spacing: 0.05em;
}

.product-title {
    font-size: 1.25rem;
    font-weight: 700;
    color: var(--dark-color);
    margin: 0.5rem 0;
}

.product-rating {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    margin-bottom: 1rem;
}

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

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

.product-features {
    margin-bottom: 1.25rem;
    padding-left: 1.25rem;
}

.product-features li {
    font-size: 0.875rem;
    color: var(--text-color);
    margin-bottom: 0.375rem;
    position: relative;
}

.product-features li::before {
    content: '✓';
    position: absolute;
    left: -1.25rem;
    color: var(--secondary-color);
    font-weight: bold;
}

.product-price {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    margin-bottom: 1rem;
}

.price-current {
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--dark-color);
}

.price-original {
    font-size: 1rem;
    color: var(--text-light);
    text-decoration: line-through;
}

.icon-external {
    flex-shrink: 0;
}

.load-more {
    text-align: center;
    margin-top: 3rem;
}

/* Comparison Section */
.comparison {
    background: var(--white);
    padding: 5rem 0;
}

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

.comparison-table {
    width: 100%;
    min-width: 600px;
    border-collapse: collapse;
    background: var(--white);
}

.comparison-table th,
.comparison-table td {
    padding: 1rem 1.25rem;
    text-align: left;
    border-bottom: 1px solid var(--border-color);
}

.comparison-table th {
    background: var(--dark-color);
    color: var(--white);
    font-weight: 600;
    font-size: 0.9375rem;
}

.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:first-child {
    font-weight: 600;
    color: var(--dark-color);
    background: var(--bg-color);
}

.comparison-table tr:hover td {
    background: #f1f5f9;
}

.comparison-table tr:hover td:first-child {
    background: #e2e8f0;
}

.comparison-table .check {
    color: var(--secondary-color);
    font-weight: 600;
}

.comparison-table .action-row td {
    background: var(--bg-color);
    text-align: center;
    padding: 1.25rem;
}

/* Guides Section */
.guides {
    padding: 5rem 0;
}

.guides-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
    gap: 1.5rem;
}

.guide-card {
    background: var(--white);
    padding: 2rem;
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-md);
    transition: var(--transition);
    text-align: center;
}

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

.guide-icon {
    font-size: 3rem;
    margin-bottom: 1rem;
}

.guide-card h3 {
    font-size: 1.25rem;
    font-weight: 700;
    color: var(--dark-color);
    margin-bottom: 0.75rem;
}

.guide-card p {
    font-size: 0.9375rem;
    color: var(--text-light);
    line-height: 1.7;
}

/* Quiz Section */
.quiz-section {
    background: linear-gradient(135deg, var(--primary-color), var(--primary-dark));
    padding: 5rem 0;
}

.quiz-card {
    background: var(--white);
    border-radius: var(--radius-xl);
    padding: 3rem;
    max-width: 700px;
    margin: 0 auto;
    box-shadow: var(--shadow-xl);
    text-align: center;
}

.quiz-card h2 {
    font-size: 2rem;
    font-weight: 700;
    color: var(--dark-color);
    margin-bottom: 0.5rem;
}

.quiz-card > p {
    color: var(--text-light);
    margin-bottom: 2rem;
}

.quiz-container {
    min-height: 280px;
}

.quiz-step {
    display: none;
    animation: fadeIn 0.3s ease;
}

.quiz-step.active {
    display: block;
}

@keyframes fadeIn {
    from { opacity: 0; transform: translateY(10px); }
    to { opacity: 1; transform: translateY(0); }
}

.quiz-step h3 {
    font-size: 1.5rem;
    color: var(--dark-color);
    margin-bottom: 1.5rem;
}

.quiz-options {
    display: grid;
    gap: 0.75rem;
}

.quiz-option {
    padding: 1rem 1.5rem;
    font-size: 1rem;
    background: var(--bg-color);
    border: 2px solid var(--border-color);
    border-radius: var(--radius-md);
    cursor: pointer;
    transition: var(--transition);
}

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

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

.quiz-progress {
    margin-top: 2rem;
}

.progress-bar {
    height: 8px;
    background: var(--border-color);
    border-radius: 50px;
    overflow: hidden;
    margin-bottom: 0.75rem;
}

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

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

.quiz-result {
    padding: 2rem 0;
}

.quiz-result h3 {
    font-size: 1.75rem;
    color: var(--dark-color);
    margin-bottom: 1.5rem;
}

.result-content {
    background: var(--bg-color);
    padding: 2rem;
    border-radius: var(--radius-lg);
}

.result-product {
    display: flex;
    align-items: center;
    gap: 1.5rem;
    text-align: left;
}

.result-product-image {
    width: 100px;
    height: 100px;
    border-radius: var(--radius-md);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 2.5rem;
    flex-shrink: 0;
}

.result-product-info h4 {
    font-size: 1.25rem;
    color: var(--dark-color);
    margin-bottom: 0.5rem;
}

.result-product-info p {
    font-size: 0.9375rem;
    color: var(--text-light);
    margin-bottom: 1rem;
}

/* Newsletter */
.newsletter {
    background: var(--dark-color);
    padding: 5rem 0;
}

.newsletter-content {
    text-align: center;
    max-width: 600px;
    margin: 0 auto;
    color: var(--white);
}

.newsletter-content h2 {
    font-size: 2rem;
    font-weight: 700;
    margin-bottom: 0.75rem;
}

.newsletter-content > p {
    opacity: 0.9;
    margin-bottom: 2rem;
}

.newsletter-form {
    display: flex;
    gap: 0.75rem;
    max-width: 450px;
    margin: 0 auto;
}

.newsletter-form input {
    flex: 1;
    padding: 1rem 1.25rem;
    font-size: 1rem;
    border: none;
    border-radius: var(--radius-md);
    outline: none;
}

.newsletter-form input:focus {
    box-shadow: 0 0 0 3px rgba(59, 130, 246, 0.5);
}

.newsletter-note {
    font-size: 0.875rem;
    opacity: 0.7;
    margin-top: 1rem;
}

/* SEO Content Section */
.seo-content {
    background: var(--bg-color);
    padding: 5rem 0;
}

.seo-wrapper {
    max-width: 900px;
    margin: 0 auto;
    background: var(--white);
    padding: 3rem;
    border-radius: var(--radius-xl);
    box-shadow: var(--shadow-md);
}

.seo-wrapper h2 {
    font-size: 2rem;
    font-weight: 700;
    color: var(--dark-color);
    margin-bottom: 1.5rem;
    text-align: center;
}

.seo-wrapper h3 {
    font-size: 1.375rem;
    font-weight: 700;
    color: var(--dark-color);
    margin: 2rem 0 1rem;
}

.seo-wrapper p {
    color: var(--text-color);
    line-height: 1.8;
    margin-bottom: 1rem;
}

.seo-wrapper strong {
    color: var(--dark-color);
}

/* Footer */
.footer {
    background: var(--dark-color);
    color: var(--white);
    padding: 4rem 0 2rem;
}

.footer-grid {
    display: grid;
    grid-template-columns: 2fr 1fr 1fr 1fr;
    gap: 3rem;
    margin-bottom: 3rem;
}

.footer-brand p {
    margin-top: 1rem;
    opacity: 0.8;
    font-size: 0.9375rem;
    line-height: 1.7;
}

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

.footer-links h4 {
    font-size: 1rem;
    font-weight: 600;
    margin-bottom: 1.25rem;
}

.footer-links ul {
    display: flex;
    flex-direction: column;
    gap: 0.75rem;
}

.footer-links a {
    font-size: 0.9375rem;
    opacity: 0.8;
    transition: var(--transition);
}

.footer-links a:hover {
    opacity: 1;
    color: var(--primary-light);
}

.footer-bottom {
    padding-top: 2rem;
    border-top: 1px solid rgba(255, 255, 255, 0.1);
    text-align: center;
}

.footer-bottom p {
    font-size: 0.875rem;
    opacity: 0.7;
    margin-bottom: 0.5rem;
}

.affiliate-disclosure {
    font-size: 0.8125rem !important;
    max-width: 700px;
    margin: 0 auto;
    line-height: 1.6;
}

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

@media (max-width: 768px) {
    .mobile-menu-btn {
        display: flex;
    }

    .nav-list {
        display: none;
        position: absolute;
        top: 100%;
        left: 0;
        right: 0;
        background: var(--white);
        flex-direction: column;
        padding: 1rem;
        gap: 0;
        box-shadow: var(--shadow-lg);
    }

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

    .nav-link {
        padding: 1rem;
        border-bottom: 1px solid var(--border-color);
        width: 100%;
    }

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

    .hero-stats {
        gap: 1.5rem;
    }

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

    .categories {
        top: 64px;
    }

    .category-filters {
        justify-content: flex-start;
        overflow-x: auto;
        padding-bottom: 0.5rem;
        flex-wrap: nowrap;
    }

    .filter-btn {
        white-space: nowrap;
    }

    .section-title {
        font-size: 1.75rem;
    }

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

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

    .quiz-card {
        padding: 2rem 1.5rem;
    }

    .newsletter-form {
        flex-direction: column;
    }

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

    .footer-brand {
        display: flex;
        flex-direction: column;
        align-items: center;
    }

    .result-product {
        flex-direction: column;
        text-align: center;
    }

    .seo-wrapper {
        padding: 2rem 1.5rem;
    }
}

@media (max-width: 480px) {
    .hero-cta {
        flex-direction: column;
        width: 100%;
    }

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

    .comparison-table th,
    .comparison-table td {
        padding: 0.75rem;
        font-size: 0.875rem;
    }
}

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

.product-card {
    animation: slideIn 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; }

/* Scroll reveal */
.product-card,
.guide-card {
    opacity: 0;
    transform: translateY(20px);
}

.product-card.visible,
.guide-card.visible {
    animation: slideIn 0.5s ease forwards;
}

/* Custom scrollbar */
::-webkit-scrollbar {
    width: 8px;
    height: 8px;
}

::-webkit-scrollbar-track {
    background: var(--bg-color);
}

::-webkit-scrollbar-thumb {
    background: var(--border-color);
    border-radius: 50px;
}

::-webkit-scrollbar-thumb:hover {
    background: var(--text-light);
}