/* CSS Variables */
:root {
    --primary: #2e7d32;
    --primary-light: #60ad5e;
    --primary-dark: #005005;
    --secondary: #ff6f00;
    --secondary-light: #ffa040;
    --accent: #1565c0;
    --background: #fafafa;
    --surface: #ffffff;
    --text-primary: #212121;
    --text-secondary: #757575;
    --text-light: #9e9e9e;
    --border: #e0e0e0;
    --shadow-sm: 0 1px 3px rgba(0,0,0,0.12), 0 1px 2px rgba(0,0,0,0.08);
    --shadow-md: 0 4px 6px rgba(0,0,0,0.1), 0 2px 4px rgba(0,0,0,0.06);
    --shadow-lg: 0 10px 25px rgba(0,0,0,0.1), 0 5px 10px rgba(0,0,0,0.05);
    --radius-sm: 4px;
    --radius-md: 8px;
    --radius-lg: 16px;
    --radius-xl: 24px;
    --transition: all 0.3s ease;
    --max-width: 1280px;
}

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

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

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

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

ul {
    list-style: none;
}

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

button {
    font-family: inherit;
    cursor: pointer;
    border: none;
    background: none;
}

/* Container */
.container {
    width: 100%;
    max-width: var(--max-width);
    margin: 0 auto;
    padding: 0 24px;
}

/* Typography */
h1, h2, h3, h4, h5, h6 {
    line-height: 1.3;
    font-weight: 600;
}

h1 { font-size: 2.75rem; }
h2 { font-size: 2rem; }
h3 { font-size: 1.5rem; }
h4 { font-size: 1.25rem; }

/* Buttons */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: 12px 24px;
    font-size: 1rem;
    font-weight: 500;
    border-radius: var(--radius-md);
    transition: var(--transition);
    gap: 8px;
}

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

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

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

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

.btn-amazon {
    background: #ff9900;
    color: #111;
    font-weight: 600;
}

.btn-amazon:hover {
    background: #e68a00;
    transform: translateY(-2px);
}

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

/* Navigation */
.navbar {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 1000;
    background: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(10px);
    box-shadow: var(--shadow-sm);
    padding: 12px 0;
}

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

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

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

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

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

.nav-links {
    display: flex;
    gap: 32px;
}

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

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

.nav-links a::after {
    content: '';
    position: absolute;
    bottom: -4px;
    left: 0;
    width: 0;
    height: 2px;
    background: var(--primary);
    transition: var(--transition);
}

.nav-links a:hover::after {
    width: 100%;
}

.mobile-menu-btn {
    display: none;
    flex-direction: column;
    gap: 5px;
    padding: 8px;
}

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

/* Hero Section */
.hero {
    padding: 140px 0 80px;
    background: linear-gradient(135deg, #e8f5e9 0%, #fff 50%, #e3f2fd 100%);
    overflow: hidden;
}

.hero .container {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 60px;
    align-items: center;
}

.hero-content h1 {
    margin-bottom: 20px;
}

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

.hero-subtitle {
    font-size: 1.25rem;
    color: var(--text-secondary);
    margin-bottom: 32px;
    max-width: 500px;
}

.hero-buttons {
    display: flex;
    gap: 16px;
    margin-bottom: 48px;
}

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

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

.stat-number {
    font-size: 1.75rem;
    font-weight: 700;
    color: var(--primary);
}

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

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

.hero-image-placeholder {
    width: 100%;
    max-width: 400px;
    animation: float 3s ease-in-out infinite;
}

@keyframes float {
    0%, 100% { transform: translateY(0); }
    50% { transform: translateY(-20px); }
}

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

.section-header h2 {
    margin-bottom: 12px;
}

.section-header p {
    color: var(--text-secondary);
    font-size: 1.125rem;
}

/* Filters Section */
.filters-section {
    padding: 60px 0 20px;
    background: var(--surface);
}

.filters-bar {
    display: flex;
    justify-content: space-between;
    align-items: center;
    flex-wrap: wrap;
    gap: 20px;
    padding: 16px 24px;
    background: var(--background);
    border-radius: var(--radius-lg);
}

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

.view-btn {
    padding: 10px 12px;
    border-radius: var(--radius-md);
    color: var(--text-secondary);
    transition: var(--transition);
}

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

.filter-controls {
    display: flex;
    gap: 12px;
    flex-wrap: wrap;
}

.filter-select {
    padding: 10px 16px;
    border: 2px solid var(--border);
    border-radius: var(--radius-md);
    background: var(--surface);
    font-size: 0.9375rem;
    cursor: pointer;
    transition: var(--transition);
}

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

/* Products Section */
.products-section {
    padding: 40px 0 80px;
    background: var(--surface);
}

.products-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
    gap: 24px;
}

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

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

.product-badge {
    position: absolute;
    top: 16px;
    left: 16px;
    padding: 6px 12px;
    background: var(--secondary);
    color: white;
    font-size: 0.75rem;
    font-weight: 600;
    border-radius: var(--radius-sm);
    z-index: 10;
}

.product-image {
    position: relative;
    height: 200px;
    background: linear-gradient(135deg, #f5f5f5 0%, #e0e0e0 100%);
    display: flex;
    align-items: center;
    justify-content: center;
    overflow: hidden;
}

.product-image-placeholder {
    width: 120px;
    height: 120px;
    background: var(--primary-light);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 3rem;
    color: white;
}

.product-compare-btn {
    position: absolute;
    top: 12px;
    right: 12px;
    width: 36px;
    height: 36px;
    border-radius: 50%;
    background: white;
    box-shadow: var(--shadow-sm);
    display: flex;
    align-items: center;
    justify-content: center;
    transition: var(--transition);
    z-index: 10;
}

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

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

.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: 8px;
}

.product-name {
    font-size: 1.125rem;
    font-weight: 600;
    margin-bottom: 8px;
    line-height: 1.4;
}

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

.stars {
    color: #ffc107;
    font-size: 0.875rem;
}

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

.product-specs {
    display: flex;
    gap: 16px;
    margin-bottom: 16px;
    flex-wrap: wrap;
}

.spec {
    display: flex;
    align-items: center;
    gap: 4px;
    font-size: 0.8125rem;
    color: var(--text-secondary);
}

.spec-icon {
    font-size: 1rem;
}

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

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

.product-price span {
    font-size: 1rem;
    font-weight: 400;
    color: var(--text-secondary);
}

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

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

.products-table {
    width: 100%;
    border-collapse: collapse;
    background: var(--surface);
    min-width: 800px;
}

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

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

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

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

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

.table-product-image {
    width: 50px;
    height: 50px;
    border-radius: var(--radius-md);
    background: linear-gradient(135deg, #f5f5f5, #e0e0e0);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.5rem;
}

.table-product-name {
    font-weight: 500;
}

.table-rating {
    display: flex;
    align-items: center;
    gap: 4px;
}

.table-compare-btn {
    width: 32px;
    height: 32px;
    border-radius: 50%;
    border: 2px solid var(--border);
    display: flex;
    align-items: center;
    justify-content: center;
    transition: var(--transition);
}

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

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

.compare-slots {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 24px;
    margin-bottom: 32px;
}

.compare-slot {
    background: var(--surface);
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-sm);
    min-height: 300px;
    overflow: hidden;
}

.compare-slot-empty {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    height: 100%;
    min-height: 300px;
    border: 2px dashed var(--border);
    border-radius: var(--radius-lg);
    cursor: pointer;
    transition: var(--transition);
}

.compare-slot-empty:hover {
    border-color: var(--primary);
    background: rgba(46, 125, 50, 0.05);
}

.plus-icon {
    font-size: 3rem;
    color: var(--text-light);
    margin-bottom: 12px;
}

.compare-slot-empty p {
    color: var(--text-secondary);
}

.compare-slot-content {
    position: relative;
}

.compare-slot-header {
    padding: 16px;
    background: var(--background);
    position: relative;
}

.compare-remove-btn {
    position: absolute;
    top: 8px;
    right: 8px;
    width: 28px;
    height: 28px;
    border-radius: 50%;
    background: var(--surface);
    box-shadow: var(--shadow-sm);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.25rem;
    color: var(--text-secondary);
    transition: var(--transition);
}

.compare-remove-btn:hover {
    background: #f44336;
    color: white;
}

.compare-slot-image {
    width: 80px;
    height: 80px;
    margin: 0 auto 12px;
    background: linear-gradient(135deg, #f5f5f5, #e0e0e0);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 2rem;
}

.compare-slot-name {
    text-align: center;
    font-weight: 600;
    font-size: 0.9375rem;
}

.compare-slot-price {
    text-align: center;
    font-size: 1.25rem;
    font-weight: 700;
    color: var(--primary);
    margin-top: 8px;
}

.compare-slot-body {
    padding: 16px;
}

.compare-slot-specs {
    display: flex;
    flex-direction: column;
    gap: 12px;
}

.compare-spec-item {
    display: flex;
    justify-content: space-between;
    font-size: 0.875rem;
    padding-bottom: 8px;
    border-bottom: 1px solid var(--border);
}

.compare-spec-label {
    color: var(--text-secondary);
}

.compare-spec-value {
    font-weight: 500;
}

.compare-slot-footer {
    padding: 16px;
    border-top: 1px solid var(--border);
}

/* Compare Table */
.compare-table-container {
    margin-top: 40px;
    overflow-x: auto;
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-sm);
}

.compare-table {
    width: 100%;
    border-collapse: collapse;
    background: var(--surface);
}

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

.compare-table th:first-child,
.compare-table td:first-child {
    text-align: left;
    font-weight: 500;
    background: var(--background);
}

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

.compare-table thead th:first-child {
    background: var(--primary-dark);
}

.compare-actions {
    text-align: center;
    margin-top: 24px;
}

/* Quiz Section */
.quiz-section {
    padding: 80px 0;
    background: linear-gradient(135deg, #e8f5e9 0%, #e3f2fd 100%);
}

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

.quiz-progress {
    height: 8px;
    background: var(--border);
    border-radius: 4px;
    margin-bottom: 32px;
    overflow: hidden;
}

.quiz-progress-bar {
    height: 100%;
    background: var(--primary);
    border-radius: 4px;
    transition: width 0.3s ease;
    width: 20%;
}

.quiz-question {
    font-size: 1.25rem;
    font-weight: 600;
    margin-bottom: 24px;
    text-align: center;
}

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

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

.quiz-option:hover {
    border-color: var(--primary);
    background: rgba(46, 125, 50, 0.05);
}

.quiz-option.selected {
    border-color: var(--primary);
    background: rgba(46, 125, 50, 0.1);
}

.quiz-option-radio {
    width: 20px;
    height: 20px;
    border: 2px solid var(--border);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    flex-shrink: 0;
}

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

.quiz-option.selected .quiz-option-radio::after {
    content: '';
    width: 8px;
    height: 8px;
    background: white;
    border-radius: 50%;
}

.quiz-navigation {
    display: flex;
    justify-content: space-between;
    margin-top: 32px;
}

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

.quiz-result h3 {
    font-size: 1.5rem;
    margin-bottom: 16px;
    color: var(--primary);
}

.quiz-result-products {
    display: flex;
    flex-direction: column;
    gap: 16px;
    margin-top: 24px;
}

.quiz-result-product {
    display: flex;
    align-items: center;
    gap: 16px;
    padding: 16px;
    background: var(--background);
    border-radius: var(--radius-md);
    text-align: left;
}

.quiz-result-product-image {
    width: 60px;
    height: 60px;
    background: linear-gradient(135deg, #f5f5f5, #e0e0e0);
    border-radius: var(--radius-md);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.5rem;
    flex-shrink: 0;
}

.quiz-result-product-info {
    flex-grow: 1;
}

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

.quiz-result-product-match {
    font-size: 0.875rem;
    color: var(--primary);
    font-weight: 500;
}

.quiz-restart {
    margin-top: 24px;
}

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

.guide-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 24px;
}

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

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

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

.guide-card h3 {
    margin-bottom: 12px;
    color: var(--text-primary);
}

.guide-card p {
    color: var(--text-secondary);
    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 {
    color: var(--primary);
    margin-bottom: 24px;
    text-align: center;
}

.seo-content h3 {
    margin-top: 32px;
    margin-bottom: 16px;
    color: var(--text-primary);
}

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

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

/* Footer */
.footer {
    background: #1a1a1a;
    color: #fff;
    padding: 60px 0 0;
}

.footer-grid {
    display: grid;
    grid-template-columns: 2fr repeat(3, 1fr);
    gap: 40px;
    padding-bottom: 40px;
    border-bottom: 1px solid rgba(255,255,255,0.1);
}

.footer-brand p {
    margin-top: 16px;
    color: rgba(255,255,255,0.7);
    max-width: 280px;
}

.footer-links h4 {
    margin-bottom: 20px;
    font-size: 1rem;
    color: white;
}

.footer-links ul {
    display: flex;
    flex-direction: column;
    gap: 12px;
}

.footer-links a {
    color: rgba(255,255,255,0.7);
    font-size: 0.9375rem;
    transition: var(--transition);
}

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

.footer-bottom {
    padding: 24px 0;
    text-align: center;
}

.footer-bottom p {
    color: rgba(255,255,255,0.5);
    font-size: 0.875rem;
}

.affiliate-disclosure {
    margin-top: 12px;
    font-size: 0.8125rem !important;
}

/* Modal */
.modal {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: rgba(0,0,0,0.5);
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 2000;
    opacity: 0;
    visibility: hidden;
    transition: var(--transition);
}

.modal.active {
    opacity: 1;
    visibility: visible;
}

.modal-content {
    background: var(--surface);
    border-radius: var(--radius-lg);
    max-width: 600px;
    max-height: 80vh;
    width: 90%;
    overflow-y: auto;
    position: relative;
    padding: 32px;
    transform: translateY(-20px);
    transition: var(--transition);
}

.modal.active .modal-content {
    transform: translateY(0);
}

.modal-large {
    max-width: 800px;
}

.modal-close {
    position: absolute;
    top: 16px;
    right: 16px;
    width: 36px;
    height: 36px;
    border-radius: 50%;
    background: var(--background);
    font-size: 1.5rem;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: var(--transition);
}

.modal-close:hover {
    background: #f44336;
    color: white;
}

.modal-body h2 {
    margin-bottom: 16px;
    color: var(--text-primary);
}

.modal-body h3 {
    margin-top: 24px;
    margin-bottom: 12px;
}

.modal-body p {
    color: var(--text-secondary);
    margin-bottom: 12px;
}

/* Compare Product List in Modal */
.compare-product-list {
    display: flex;
    flex-direction: column;
    gap: 12px;
    margin-top: 20px;
    max-height: 400px;
    overflow-y: auto;
}

.compare-product-option {
    display: flex;
    align-items: center;
    gap: 16px;
    padding: 12px;
    border: 2px solid var(--border);
    border-radius: var(--radius-md);
    cursor: pointer;
    transition: var(--transition);
}

.compare-product-option:hover {
    border-color: var(--primary);
    background: rgba(46, 125, 50, 0.05);
}

.compare-product-option-image {
    width: 50px;
    height: 50px;
    background: linear-gradient(135deg, #f5f5f5, #e0e0e0);
    border-radius: var(--radius-md);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.5rem;
}

.compare-product-option-info {
    flex-grow: 1;
}

.compare-product-option-name {
    font-weight: 500;
    margin-bottom: 4px;
}

.compare-product-option-price {
    font-size: 0.875rem;
    color: var(--primary);
    font-weight: 600;
}

/* Product Modal Styles */
.product-modal-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 32px;
}

.product-modal-image {
    background: linear-gradient(135deg, #f5f5f5, #e0e0e0);
    border-radius: var(--radius-lg);
    height: 300px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 5rem;
}

.product-modal-info h2 {
    margin-bottom: 8px;
}

.product-modal-brand {
    color: var(--primary);
    font-weight: 600;
    font-size: 0.875rem;
    text-transform: uppercase;
    letter-spacing: 0.5px;
    margin-bottom: 12px;
}

.product-modal-price {
    font-size: 2rem;
    font-weight: 700;
    margin-bottom: 16px;
}

.product-modal-features {
    margin-bottom: 24px;
}

.product-modal-features h4 {
    margin-bottom: 12px;
}

.product-modal-features ul {
    display: flex;
    flex-direction: column;
    gap: 8px;
}

.product-modal-features li {
    display: flex;
    align-items: flex-start;
    gap: 8px;
    color: var(--text-secondary);
}

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

.product-modal-actions {
    display: flex;
    gap: 12px;
}

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

    .hero-content {
        max-width: 600px;
        margin: 0 auto;
    }

    .hero-subtitle {
        max-width: 100%;
    }

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

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

    .hero-image {
        display: none;
    }

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

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

@media (max-width: 768px) {
    h1 { font-size: 2rem; }
    h2 { font-size: 1.5rem; }
    h3 { font-size: 1.25rem; }

    .nav-links {
        display: none;
        position: absolute;
        top: 100%;
        left: 0;
        right: 0;
        flex-direction: column;
        background: var(--surface);
        padding: 20px;
        gap: 16px;
        box-shadow: var(--shadow-md);
    }

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

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

    .filters-bar {
        flex-direction: column;
        align-items: stretch;
    }

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

    .filter-controls {
        flex-direction: column;
    }

    .filter-select {
        width: 100%;
    }

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

    .quiz-container {
        padding: 24px;
    }

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

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

    .footer-brand {
        margin-bottom: 20px;
    }

    .footer-brand p {
        max-width: 100%;
    }
}

/* Utility Classes */
.text-center { text-align: center; }
.mb-0 { margin-bottom: 0; }
.mb-1 { margin-bottom: 8px; }
.mb-2 { margin-bottom: 16px; }
.mb-3 { margin-bottom: 24px; }
.mb-4 { margin-bottom: 32px; }

/* No Results */
.no-results {
    text-align: center;
    padding: 60px 20px;
    color: var(--text-secondary);
}

.no-results-icon {
    font-size: 4rem;
    margin-bottom: 16px;
}

/* Loading Animation */
@keyframes pulse {
    0%, 100% { opacity: 1; }
    50% { opacity: 0.5; }
}

.loading {
    animation: pulse 1.5s ease-in-out infinite;
}

/* Scroll to top button */
.scroll-top {
    position: fixed;
    bottom: 24px;
    right: 24px;
    width: 48px;
    height: 48px;
    background: var(--primary);
    color: white;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.25rem;
    box-shadow: var(--shadow-lg);
    opacity: 0;
    visibility: hidden;
    transition: var(--transition);
    z-index: 1000;
}

.scroll-top.visible {
    opacity: 1;
    visibility: visible;
}

.scroll-top:hover {
    background: var(--primary-dark);
    transform: translateY(-4px);
}