/* ===== CSS Variables ===== */
:root {
    --primary: #667eea;
    --primary-dark: #5a67d8;
    --secondary: #764ba2;
    --accent: #48bb78;
    --dark: #1a202c;
    --dark-light: #2d3748;
    --gray-100: #f7fafc;
    --gray-200: #edf2f7;
    --gray-300: #e2e8f0;
    --gray-400: #cbd5e0;
    --gray-500: #a0aec0;
    --gray-600: #718096;
    --gray-700: #4a5568;
    --gray-800: #2d3748;
    --white: #ffffff;
    --gradient: linear-gradient(135deg, var(--primary) 0%, var(--secondary) 100%);
    --shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, 0.05);
    --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-lg: 20px;
    --transition: all 0.3s ease;
}

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

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

body {
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
    background: var(--gray-100);
    color: var(--dark);
    line-height: 1.6;
    overflow-x: hidden;
}

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

a {
    color: inherit;
    text-decoration: none;
}

ul {
    list-style: none;
}

/* ===== Utilities ===== */
.container {
    width: 100%;
    max-width: 1280px;
    margin: 0 auto;
    padding: 0 1.5rem;
}

.hidden {
    display: none !important;
}

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

/* ===== Buttons ===== */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 0.5rem;
    padding: 0.875rem 1.75rem;
    font-size: 0.9375rem;
    font-weight: 600;
    border-radius: var(--radius);
    border: none;
    cursor: pointer;
    transition: var(--transition);
    text-decoration: none;
}

.btn-primary {
    background: var(--gradient);
    color: var(--white);
    box-shadow: 0 4px 14px 0 rgba(102, 126, 234, 0.4);
}

.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 6px 20px 0 rgba(102, 126, 234, 0.5);
}

.btn-secondary {
    background: var(--white);
    color: var(--dark);
    border: 2px solid var(--gray-300);
}

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

.btn-sm {
    padding: 0.5rem 1rem;
    font-size: 0.8125rem;
    border-radius: 8px;
    background: var(--gradient);
    color: var(--white);
}

.btn-sm:hover {
    opacity: 0.9;
}

/* ===== Header ===== */
.header {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 1000;
    background: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(10px);
    border-bottom: 1px solid var(--gray-200);
}

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

.logo {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    font-size: 1.25rem;
    font-weight: 600;
    color: var(--dark);
}

.logo-icon {
    width: 32px;
    height: 32px;
    color: var(--primary);
}

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

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

.nav a {
    font-weight: 500;
    color: var(--gray-700);
    transition: var(--transition);
}

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

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

.mobile-menu-btn span {
    display: block;
    width: 24px;
    height: 2px;
    background: var(--dark);
    transition: var(--transition);
}

/* ===== Hero Section ===== */
.hero {
    padding: 8rem 0 5rem;
    background: linear-gradient(180deg, var(--white) 0%, var(--gray-100) 100%);
    overflow: hidden;
}

.hero .container {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 4rem;
    align-items: center;
}

.hero-badge {
    display: inline-block;
    padding: 0.5rem 1rem;
    background: rgba(102, 126, 234, 0.1);
    color: var(--primary);
    font-size: 0.875rem;
    font-weight: 600;
    border-radius: 50px;
    margin-bottom: 1.5rem;
}

.hero h1 {
    font-size: 3.5rem;
    font-weight: 800;
    line-height: 1.1;
    margin-bottom: 1.5rem;
    color: var(--dark);
}

.hero p {
    font-size: 1.125rem;
    color: var(--gray-600);
    margin-bottom: 2rem;
    max-width: 500px;
}

.hero-buttons {
    display: flex;
    gap: 1rem;
    margin-bottom: 3rem;
}

.hero-stats {
    display: flex;
    gap: 3rem;
}

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

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

.stat-label {
    font-size: 0.875rem;
    color: var(--gray-500);
}

.hero-visual {
    display: flex;
    justify-content: center;
    align-items: center;
}

.vacuum-showcase {
    position: relative;
    width: 300px;
    height: 400px;
}

.vacuum-showcase .glow {
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    width: 250px;
    height: 250px;
    background: var(--gradient);
    filter: blur(80px);
    opacity: 0.4;
    border-radius: 50%;
    animation: pulse 3s ease-in-out infinite;
}

@keyframes pulse {
    0%, 100% { transform: translate(-50%, -50%) scale(1); opacity: 0.4; }
    50% { transform: translate(-50%, -50%) scale(1.1); opacity: 0.5; }
}

.vacuum-illustration {
    position: relative;
    z-index: 1;
    width: 100%;
    height: 100%;
    animation: float 4s ease-in-out infinite;
}

@keyframes float {
    0%, 100% { transform: translateY(0); }
    50% { transform: translateY(-15px); }
}

/* ===== Section Header ===== */
.section-header {
    text-align: center;
    margin-bottom: 3rem;
}

.section-header h2 {
    font-size: 2.5rem;
    font-weight: 700;
    margin-bottom: 1rem;
    color: var(--dark);
}

.section-header p {
    font-size: 1.125rem;
    color: var(--gray-600);
    max-width: 600px;
    margin: 0 auto;
}

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

.view-toggle {
    display: flex;
    justify-content: center;
    gap: 0.5rem;
    margin-top: 1.5rem;
}

.toggle-btn {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 44px;
    height: 44px;
    background: var(--white);
    border: 2px solid var(--gray-300);
    border-radius: 10px;
    cursor: pointer;
    transition: var(--transition);
}

.toggle-btn svg {
    width: 20px;
    height: 20px;
    color: var(--gray-500);
}

.toggle-btn.active {
    border-color: var(--primary);
    background: rgba(102, 126, 234, 0.1);
}

.toggle-btn.active svg {
    color: var(--primary);
}

.toggle-btn:hover {
    border-color: var(--primary);
}

/* ===== Filter Bar ===== */
.filter-bar {
    display: flex;
    justify-content: center;
    flex-wrap: wrap;
    gap: 0.75rem;
    margin-bottom: 2.5rem;
}

.filter-chip {
    padding: 0.625rem 1.25rem;
    background: var(--white);
    border: 2px solid var(--gray-300);
    border-radius: 50px;
    font-size: 0.875rem;
    font-weight: 500;
    color: var(--gray-700);
    cursor: pointer;
    transition: var(--transition);
}

.filter-chip:hover {
    border-color: var(--primary);
    color: var(--primary);
}

.filter-chip.active {
    background: var(--gradient);
    border-color: transparent;
    color: var(--white);
}

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

.product-card {
    position: relative;
    background: var(--white);
    border-radius: var(--radius-lg);
    padding: 1.5rem;
    box-shadow: var(--shadow);
    transition: var(--transition);
}

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

.product-badge {
    position: absolute;
    top: 1rem;
    left: 1rem;
    padding: 0.375rem 0.75rem;
    font-size: 0.75rem;
    font-weight: 600;
    border-radius: 6px;
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

.product-badge.bestseller {
    background: #fef3c7;
    color: #92400e;
}

.product-badge.new {
    background: #dbeafe;
    color: #1e40af;
}

.product-badge.editor {
    background: #ede9fe;
    color: #5b21b6;
}

.product-badge.value {
    background: #d1fae5;
    color: #065f46;
}

.product-badge.budget-pick {
    background: #ffedd5;
    color: #c2410c;
}

.product-image {
    display: flex;
    justify-content: center;
    align-items: center;
    height: 180px;
    margin-bottom: 1rem;
}

.product-svg {
    width: 120px;
    height: 160px;
    transition: var(--transition);
}

.product-card:hover .product-svg {
    transform: scale(1.05);
}

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

.product-brand {
    font-size: 0.75rem;
    font-weight: 600;
    color: var(--gray-500);
    text-transform: uppercase;
    letter-spacing: 1px;
}

.product-name {
    font-size: 1.125rem;
    font-weight: 700;
    margin: 0.5rem 0;
    color: var(--dark);
}

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

.stars {
    color: #fbbf24;
    font-size: 0.875rem;
}

.product-rating span {
    font-size: 0.75rem;
    color: var(--gray-500);
}

.product-features {
    text-align: left;
    margin-bottom: 1.25rem;
    padding: 0 0.5rem;
}

.product-features li {
    position: relative;
    padding-left: 1.25rem;
    font-size: 0.875rem;
    color: var(--gray-600);
    margin-bottom: 0.375rem;
}

.product-features li::before {
    content: '✓';
    position: absolute;
    left: 0;
    color: var(--accent);
    font-weight: 600;
}

.product-price {
    margin-bottom: 1.25rem;
}

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

.price-note {
    font-size: 0.75rem;
    color: var(--gray-500);
    margin-left: 0.25rem;
}

.product-actions {
    display: flex;
    gap: 0.75rem;
    justify-content: center;
}

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

.btn-compare {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 44px;
    height: 44px;
    background: var(--gray-100);
    border: 2px solid var(--gray-300);
    border-radius: var(--radius);
    cursor: pointer;
    transition: var(--transition);
    flex-shrink: 0;
}

.btn-compare svg {
    width: 20px;
    height: 20px;
    color: var(--gray-600);
}

.btn-compare:hover {
    border-color: var(--primary);
    background: rgba(102, 126, 234, 0.1);
}

.btn-compare:hover svg {
    color: var(--primary);
}

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

.btn-compare.active svg {
    color: var(--white);
}

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

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

.products-table th,
.products-table td {
    padding: 1rem 1.5rem;
    text-align: left;
    border-bottom: 1px solid var(--gray-200);
}

.products-table th {
    background: var(--gray-50);
    font-weight: 600;
    color: var(--gray-700);
    font-size: 0.875rem;
    cursor: pointer;
    user-select: none;
    white-space: nowrap;
}

.products-table th:hover {
    background: var(--gray-100);
}

.sort-icon {
    margin-left: 0.5rem;
    opacity: 0.5;
}

.products-table tbody tr {
    transition: var(--transition);
}

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

.tag {
    display: inline-block;
    padding: 0.25rem 0.75rem;
    font-size: 0.75rem;
    font-weight: 600;
    border-radius: 50px;
}

.tag.premium {
    background: #ede9fe;
    color: #5b21b6;
}

.tag.mid-range {
    background: #dbeafe;
    color: #1e40af;
}

.tag.budget {
    background: #d1fae5;
    color: #065f46;
}

/* ===== Compare Section ===== */
.compare-section {
    padding: 5rem 0;
    background: var(--white);
}

.compare-slots {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 1.5rem;
    margin-bottom: 2rem;
}

.compare-slot {
    min-height: 200px;
    background: var(--gray-100);
    border: 2px dashed var(--gray-300);
    border-radius: var(--radius-lg);
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    padding: 1.5rem;
    transition: var(--transition);
}

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

.add-compare-btn {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 0.75rem;
    background: none;
    border: none;
    cursor: pointer;
    color: var(--gray-500);
    transition: var(--transition);
}

.add-compare-btn svg {
    width: 48px;
    height: 48px;
}

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

.compare-slot-content {
    text-align: center;
}

.compare-slot-content h4 {
    font-size: 0.875rem;
    font-weight: 600;
    margin-bottom: 0.25rem;
}

.compare-slot-content p {
    font-size: 0.75rem;
    color: var(--gray-500);
}

.remove-compare {
    margin-top: 0.75rem;
    padding: 0.375rem 0.75rem;
    font-size: 0.75rem;
    background: var(--gray-100);
    border: 1px solid var(--gray-300);
    border-radius: 6px;
    cursor: pointer;
    transition: var(--transition);
}

.remove-compare:hover {
    border-color: #ef4444;
    color: #ef4444;
}

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

.specs-table th,
.specs-table td {
    padding: 1rem 1.5rem;
    text-align: center;
    border-bottom: 1px solid var(--gray-200);
}

.specs-table th {
    background: var(--gray-50);
    font-weight: 600;
    color: var(--gray-700);
}

.specs-table td:first-child {
    text-align: left;
    font-weight: 500;
    color: var(--gray-700);
    background: var(--gray-50);
}

.specs-table .highlight {
    background: rgba(72, 187, 120, 0.1);
    color: #065f46;
    font-weight: 600;
}

/* ===== Quiz Section ===== */
.quiz-section {
    padding: 5rem 0;
    background: linear-gradient(135deg, var(--primary) 0%, var(--secondary) 100%);
}

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

.quiz-header {
    text-align: center;
    margin-bottom: 2rem;
}

.quiz-badge {
    display: inline-block;
    padding: 0.5rem 1rem;
    background: rgba(102, 126, 234, 0.1);
    color: var(--primary);
    font-size: 0.75rem;
    font-weight: 600;
    border-radius: 50px;
    text-transform: uppercase;
    letter-spacing: 1px;
    margin-bottom: 1rem;
}

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

.quiz-header p {
    color: var(--gray-600);
}

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

.progress-bar {
    height: 8px;
    background: var(--gray-200);
    border-radius: 50px;
    overflow: hidden;
    margin-bottom: 0.75rem;
}

.progress-fill {
    height: 100%;
    background: var(--gradient);
    border-radius: 50px;
    transition: width 0.3s ease;
    width: 25%;
}

.progress-text {
    font-size: 0.875rem;
    color: var(--gray-500);
    text-align: center;
    display: block;
}

.quiz-question {
    display: none;
}

.quiz-question.active {
    display: block;
    animation: fadeIn 0.3s ease;
}

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

.quiz-question h3 {
    font-size: 1.25rem;
    font-weight: 600;
    margin-bottom: 1.5rem;
    text-align: center;
}

.quiz-options {
    display: flex;
    flex-direction: column;
    gap: 1rem;
}

.quiz-option {
    display: flex;
    align-items: center;
    gap: 1rem;
    padding: 1.25rem;
    background: var(--gray-50);
    border: 2px solid var(--gray-200);
    border-radius: var(--radius);
    cursor: pointer;
    transition: var(--transition);
    text-align: left;
}

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

.quiz-option.selected {
    border-color: var(--primary);
    background: rgba(102, 126, 234, 0.1);
}

.option-icon {
    font-size: 1.5rem;
    width: 48px;
    height: 48px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--white);
    border-radius: 12px;
    flex-shrink: 0;
}

.option-text {
    font-weight: 600;
    color: var(--dark);
    display: block;
}

.option-desc {
    font-size: 0.875rem;
    color: var(--gray-500);
}

.quiz-result {
    text-align: center;
    animation: fadeIn 0.5s ease;
}

.result-icon {
    font-size: 4rem;
    margin-bottom: 1rem;
}

.quiz-result h3 {
    font-size: 1.5rem;
    margin-bottom: 1.5rem;
}

.result-product {
    background: var(--gray-50);
    border-radius: var(--radius-lg);
    padding: 2rem;
    margin-bottom: 1.5rem;
}

.result-product h4 {
    font-size: 1.25rem;
    margin-bottom: 0.5rem;
}

.result-product p {
    color: var(--gray-600);
    margin-bottom: 1rem;
}

.result-product .price {
    font-size: 1.25rem;
    color: var(--primary);
    margin-bottom: 1rem;
    display: block;
}

/* ===== Guide Section ===== */
.guide-section {
    padding: 5rem 0;
}

.guide-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 2rem;
}

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

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

.guide-icon {
    width: 56px;
    height: 56px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--gradient);
    border-radius: 14px;
    margin-bottom: 1.25rem;
}

.guide-icon svg {
    width: 28px;
    height: 28px;
    color: var(--white);
}

.guide-card h3 {
    font-size: 1.125rem;
    font-weight: 600;
    margin-bottom: 0.75rem;
}

.guide-card p {
    font-size: 0.9375rem;
    color: var(--gray-600);
    line-height: 1.7;
}

/* ===== SEO Section ===== */
.seo-section {
    padding: 5rem 0;
    background: var(--white);
}

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

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

.seo-content h3 {
    font-size: 1.25rem;
    font-weight: 600;
    margin-top: 2rem;
    margin-bottom: 1rem;
    color: var(--dark);
}

.seo-content p {
    font-size: 1rem;
    color: var(--gray-700);
    line-height: 1.8;
    margin-bottom: 1rem;
}

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

/* ===== Footer ===== */
.footer {
    background: var(--dark);
    color: var(--gray-400);
    padding: 4rem 0 2rem;
}

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

.footer-brand .logo {
    color: var(--white);
    margin-bottom: 1rem;
}

.footer-brand p {
    font-size: 0.9375rem;
    line-height: 1.7;
}

.footer-links h4 {
    color: var(--white);
    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;
    transition: var(--transition);
}

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

.footer-bottom {
    padding-top: 2rem;
    border-top: 1px solid var(--gray-700);
    text-align: center;
}

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

.affiliate-disclosure {
    font-size: 0.75rem;
    color: var(--gray-500);
}

/* ===== Modal ===== */
.modal {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    z-index: 2000;
    display: none;
    align-items: center;
    justify-content: center;
}

.modal.active {
    display: flex;
}

.modal-overlay {
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: rgba(0, 0, 0, 0.5);
    backdrop-filter: blur(4px);
}

.modal-content {
    position: relative;
    background: var(--white);
    border-radius: var(--radius-lg);
    padding: 2rem;
    max-width: 600px;
    width: 90%;
    max-height: 80vh;
    overflow-y: auto;
    animation: modalIn 0.3s ease;
}

@keyframes modalIn {
    from { opacity: 0; transform: scale(0.95); }
    to { opacity: 1; transform: scale(1); }
}

.modal-close {
    position: absolute;
    top: 1rem;
    right: 1rem;
    width: 36px;
    height: 36px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--gray-100);
    border: none;
    border-radius: 50%;
    font-size: 1.25rem;
    cursor: pointer;
    transition: var(--transition);
}

.modal-close:hover {
    background: var(--gray-200);
}

.modal-content h3 {
    font-size: 1.25rem;
    margin-bottom: 1.5rem;
}

.modal-products {
    display: flex;
    flex-direction: column;
    gap: 0.75rem;
}

.modal-product-item {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 1rem;
    background: var(--gray-50);
    border-radius: var(--radius);
    cursor: pointer;
    transition: var(--transition);
}

.modal-product-item:hover {
    background: var(--gray-100);
}

.modal-product-item span {
    font-weight: 500;
}

/* ===== Responsive Design ===== */
@media (max-width: 1024px) {
    .hero .container {
        grid-template-columns: 1fr;
        text-align: center;
    }

    .hero-content {
        order: 1;
    }

    .hero-visual {
        order: 0;
        margin-bottom: 2rem;
    }

    .vacuum-showcase {
        width: 200px;
        height: 280px;
    }

    .hero p {
        margin: 0 auto 2rem;
    }

    .hero-buttons {
        justify-content: center;
    }

    .hero-stats {
        justify-content: center;
    }

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

@media (max-width: 768px) {
    .nav {
        display: none;
        position: absolute;
        top: 100%;
        left: 0;
        right: 0;
        background: var(--white);
        flex-direction: column;
        padding: 1.5rem;
        gap: 1rem;
        border-bottom: 1px solid var(--gray-200);
        box-shadow: var(--shadow-lg);
    }

    .nav.active {
        display: flex;
    }

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

    .hero {
        padding: 6rem 0 3rem;
    }

    .hero h1 {
        font-size: 2.25rem;
    }

    .hero-stats {
        flex-wrap: wrap;
        gap: 2rem;
    }

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

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

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

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

    .footer-brand {
        margin-bottom: 1rem;
    }

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

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

    .btn {
        width: 100%;
    }

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

    .filter-chip {
        flex-shrink: 0;
    }
}