/* ===== CSS Variables ===== */
:root {
    --primary: #2563eb;
    --primary-dark: #1d4ed8;
    --primary-light: #3b82f6;
    --secondary: #0891b2;
    --accent: #06b6d4;
    --success: #10b981;
    --warning: #f59e0b;
    --error: #ef4444;

    --gray-50: #f9fafb;
    --gray-100: #f3f4f6;
    --gray-200: #e5e7eb;
    --gray-300: #d1d5db;
    --gray-400: #9ca3af;
    --gray-500: #6b7280;
    --gray-600: #4b5563;
    --gray-700: #374151;
    --gray-800: #1f2937;
    --gray-900: #111827;

    --white: #ffffff;
    --black: #000000;

    --gradient-primary: linear-gradient(135deg, #2563eb 0%, #0891b2 100%);
    --gradient-hero: linear-gradient(135deg, #1e3a8a 0%, #0c4a6e 50%, #134e4a 100%);
    --gradient-card: linear-gradient(180deg, rgba(255,255,255,0.1) 0%, rgba(255,255,255,0) 100%);

    --shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, 0.05);
    --shadow: 0 1px 3px 0 rgba(0, 0, 0, 0.1), 0 1px 2px -1px rgba(0, 0, 0, 0.1);
    --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.1), 0 2px 4px -2px rgba(0, 0, 0, 0.1);
    --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.1), 0 4px 6px -4px rgba(0, 0, 0, 0.1);
    --shadow-xl: 0 20px 25px -5px rgba(0, 0, 0, 0.1), 0 8px 10px -6px rgba(0, 0, 0, 0.1);

    --radius-sm: 0.375rem;
    --radius: 0.5rem;
    --radius-md: 0.75rem;
    --radius-lg: 1rem;
    --radius-xl: 1.5rem;
    --radius-full: 9999px;

    --transition: all 0.3s ease;
    --transition-fast: all 0.15s ease;
}

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

html {
    scroll-behavior: smooth;
}

body {
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
    font-size: 16px;
    line-height: 1.6;
    color: var(--gray-800);
    background-color: var(--white);
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

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

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

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

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

.hidden {
    display: none !important;
}

/* ===== 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);
    transition: var(--transition);
}

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

.logo {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    font-weight: 700;
    font-size: 1.25rem;
}

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

.logo-text {
    color: var(--gray-800);
}

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

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

.nav-link {
    font-weight: 500;
    color: var(--gray-600);
    padding: 0.5rem 0;
    position: relative;
}

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

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

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

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

.mobile-menu-btn span {
    display: block;
    width: 24px;
    height: 2px;
    background: var(--gray-700);
    transition: var(--transition);
}

.mobile-nav {
    display: none;
    position: fixed;
    top: 72px;
    left: 0;
    right: 0;
    background: var(--white);
    border-bottom: 1px solid var(--gray-200);
    padding: 1rem;
    z-index: 999;
    flex-direction: column;
    gap: 0.5rem;
}

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

.mobile-nav-link {
    padding: 0.75rem 1rem;
    font-weight: 500;
    color: var(--gray-700);
    border-radius: var(--radius);
}

.mobile-nav-link:hover {
    background: var(--gray-100);
    color: var(--primary);
}

/* ===== Hero Section ===== */
.hero {
    background: var(--gradient-hero);
    padding: 8rem 0 4rem;
    min-height: 100vh;
    display: flex;
    align-items: center;
    position: relative;
    overflow: hidden;
}

.hero::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='0.03'%3E%3Cpath d='M36 34v-4h-2v4h-4v2h4v4h2v-4h4v-2h-4zm0-30V0h-2v4h-4v2h4v4h2V6h4V4h-4zM6 34v-4H4v4H0v2h4v4h2v-4h4v-2H6zM6 4V0H4v4H0v2h4v4h2V6h4V4H6z'/%3E%3C/g%3E%3C/g%3E%3C/svg%3E");
}

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

.hero-content {
    color: var(--white);
}

.hero-title {
    font-size: 3.5rem;
    font-weight: 800;
    line-height: 1.1;
    margin-bottom: 1.5rem;
}

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

.hero-subtitle {
    font-size: 1.25rem;
    color: rgba(255, 255, 255, 0.8);
    margin-bottom: 2rem;
    max-width: 500px;
}

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

.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: 0.875rem 1.75rem;
    font-size: 1rem;
    font-weight: 600;
    border-radius: var(--radius-lg);
    transition: var(--transition);
}

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

.btn-primary:hover {
    background: var(--gray-100);
    transform: translateY(-2px);
    box-shadow: var(--shadow-lg);
}

.btn-secondary {
    background: rgba(255, 255, 255, 0.1);
    color: var(--white);
    border: 2px solid rgba(255, 255, 255, 0.3);
}

.btn-secondary:hover {
    background: rgba(255, 255, 255, 0.2);
    border-color: rgba(255, 255, 255, 0.5);
}

.hero-stats {
    display: flex;
    gap: 2.5rem;
}

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

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

.stat-label {
    font-size: 0.875rem;
    color: rgba(255, 255, 255, 0.7);
}

/* Fridge Illustration */
.hero-image {
    display: flex;
    justify-content: center;
    align-items: center;
}

.fridge-illustration {
    position: relative;
    width: 300px;
    height: 400px;
}

.fridge-body {
    position: relative;
    width: 100%;
    height: 100%;
    background: linear-gradient(145deg, #e8e8e8 0%, #c0c0c0 100%);
    border-radius: 20px;
    box-shadow:
        0 30px 60px rgba(0, 0, 0, 0.3),
        inset 0 2px 4px rgba(255, 255, 255, 0.5);
}

.fridge-door {
    position: absolute;
    top: 20px;
    left: 20px;
    right: 20px;
    bottom: 60px;
    background: linear-gradient(180deg, #1a1a2e 0%, #16213e 100%);
    border-radius: 12px;
    overflow: hidden;
}

.fridge-handle {
    position: absolute;
    right: 15px;
    top: 50%;
    transform: translateY(-50%);
    width: 8px;
    height: 80px;
    background: linear-gradient(180deg, #d4d4d4 0%, #a0a0a0 100%);
    border-radius: 4px;
}

.fridge-window {
    position: absolute;
    top: 20px;
    left: 20px;
    right: 40px;
    bottom: 20px;
    background: rgba(6, 182, 212, 0.1);
    border-radius: 8px;
    display: flex;
    flex-wrap: wrap;
    gap: 10px;
    padding: 15px;
    align-content: flex-end;
}

.bottle {
    width: 30px;
    height: 80px;
    background: linear-gradient(180deg, #22c55e 0%, #16a34a 100%);
    border-radius: 4px 4px 8px 8px;
    position: relative;
}

.bottle::before {
    content: '';
    position: absolute;
    top: -10px;
    left: 50%;
    transform: translateX(-50%);
    width: 12px;
    height: 15px;
    background: #16a34a;
    border-radius: 2px;
}

.can {
    width: 28px;
    height: 45px;
    background: linear-gradient(180deg, #f59e0b 0%, #d97706 100%);
    border-radius: 4px;
}

.fridge-glow {
    position: absolute;
    top: 40px;
    left: 40px;
    right: 60px;
    height: 100px;
    background: radial-gradient(ellipse at center, rgba(6, 182, 212, 0.3) 0%, transparent 70%);
    pointer-events: none;
    animation: glow 3s ease-in-out infinite;
}

@keyframes glow {
    0%, 100% { opacity: 0.5; }
    50% { opacity: 1; }
}

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

.section-title {
    font-size: 2.5rem;
    font-weight: 700;
    color: var(--gray-900);
    margin-bottom: 0.75rem;
}

.section-subtitle {
    font-size: 1.125rem;
    color: var(--gray-500);
    max-width: 600px;
    margin: 0 auto;
}

/* ===== View Toggle ===== */
.view-toggle-section {
    padding: 4rem 0 2rem;
    background: var(--gray-50);
}

.view-controls {
    display: flex;
    justify-content: center;
    gap: 0.5rem;
    margin-top: 2rem;
}

.view-btn {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    padding: 0.75rem 1.5rem;
    font-size: 0.875rem;
    font-weight: 500;
    color: var(--gray-600);
    background: var(--white);
    border: 1px solid var(--gray-300);
    border-radius: var(--radius-full);
    transition: var(--transition);
}

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

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

/* ===== Products Section ===== */
.products-section {
    padding: 2rem 0 4rem;
    background: var(--gray-50);
}

.products-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
    gap: 1.5rem;
}

/* Product Card */
.product-card {
    background: var(--white);
    border-radius: var(--radius-xl);
    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: 1rem;
    left: 1rem;
    padding: 0.375rem 0.75rem;
    font-size: 0.75rem;
    font-weight: 600;
    border-radius: var(--radius-full);
    z-index: 10;
}

.product-badge.bestseller {
    background: var(--warning);
    color: var(--white);
}

.product-badge.popular {
    background: var(--success);
    color: var(--white);
}

.product-badge.value {
    background: var(--primary);
    color: var(--white);
}

.product-image {
    width: 100%;
    height: 200px;
    background: var(--gray-100);
    display: flex;
    align-items: center;
    justify-content: center;
    position: relative;
    overflow: hidden;
}

.product-image-placeholder {
    font-size: 4rem;
    color: var(--gray-400);
}

.product-content {
    padding: 1.5rem;
}

.product-brand {
    font-size: 0.75rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    color: var(--primary);
    margin-bottom: 0.25rem;
}

.product-name {
    font-size: 1.125rem;
    font-weight: 600;
    color: var(--gray-900);
    margin-bottom: 0.5rem;
    line-height: 1.3;
}

.product-specs {
    display: flex;
    flex-wrap: wrap;
    gap: 0.5rem;
    margin-bottom: 1rem;
}

.spec-tag {
    display: inline-flex;
    align-items: center;
    gap: 0.25rem;
    padding: 0.25rem 0.5rem;
    font-size: 0.75rem;
    color: var(--gray-600);
    background: var(--gray-100);
    border-radius: var(--radius);
}

.product-features {
    display: flex;
    flex-wrap: wrap;
    gap: 0.375rem;
    margin-bottom: 1rem;
}

.feature-tag {
    padding: 0.25rem 0.5rem;
    font-size: 0.7rem;
    font-weight: 500;
    color: var(--secondary);
    background: rgba(8, 145, 178, 0.1);
    border-radius: var(--radius);
}

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

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

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

.product-price {
    display: flex;
    align-items: center;
    justify-content: space-between;
    margin-bottom: 1rem;
}

.price-range {
    font-size: 1.25rem;
    font-weight: 700;
    color: var(--gray-900);
}

.energy-rating {
    display: flex;
    align-items: center;
    gap: 0.25rem;
    padding: 0.25rem 0.5rem;
    font-size: 0.75rem;
    font-weight: 600;
    background: var(--success);
    color: var(--white);
    border-radius: var(--radius);
}

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

.btn-amazon {
    flex: 1;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 0.5rem;
    padding: 0.75rem 1rem;
    font-size: 0.875rem;
    font-weight: 600;
    color: var(--white);
    background: #ff9900;
    border-radius: var(--radius);
    transition: var(--transition);
}

.btn-amazon:hover {
    background: #e88a00;
    transform: translateY(-1px);
}

.btn-compare {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 44px;
    height: 44px;
    border: 2px solid var(--gray-300);
    border-radius: var(--radius);
    color: var(--gray-500);
    transition: var(--transition);
}

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

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

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

.products-table {
    width: 100%;
    border-collapse: collapse;
    font-size: 0.875rem;
}

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

.products-table th {
    background: var(--gray-50);
    font-weight: 600;
    color: var(--gray-700);
    white-space: nowrap;
}

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

.products-table .product-cell {
    display: flex;
    align-items: center;
    gap: 1rem;
    min-width: 250px;
}

.product-cell-image {
    width: 60px;
    height: 60px;
    background: var(--gray-100);
    border-radius: var(--radius);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.5rem;
    flex-shrink: 0;
}

.product-cell-info h4 {
    font-size: 0.875rem;
    font-weight: 600;
    color: var(--gray-900);
    margin-bottom: 0.25rem;
}

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

/* ===== Quiz Section ===== */
.quiz-section {
    padding: 5rem 0;
    background: linear-gradient(180deg, var(--white) 0%, var(--gray-50) 100%);
}

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

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

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

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

.progress-bar {
    height: 8px;
    background: var(--gray-200);
    border-radius: var(--radius-full);
    overflow: hidden;
    margin-bottom: 0.5rem;
}

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

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

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

.quiz-question h3 {
    font-size: 1.25rem;
    font-weight: 600;
    color: var(--gray-900);
    margin-bottom: 1.5rem;
    text-align: center;
}

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

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

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

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

.quiz-option-icon {
    font-size: 1.5rem;
}

.quiz-option-text {
    flex: 1;
}

.quiz-option-text strong {
    display: block;
    color: var(--gray-900);
    margin-bottom: 0.125rem;
}

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

.quiz-nav {
    display: flex;
    justify-content: space-between;
    gap: 1rem;
    margin-top: 2rem;
}

.btn-quiz {
    padding: 0.875rem 1.5rem;
    font-size: 0.875rem;
    font-weight: 600;
    border-radius: var(--radius-lg);
    transition: var(--transition);
}

.btn-quiz-back {
    color: var(--gray-600);
    background: var(--gray-100);
}

.btn-quiz-back:hover {
    background: var(--gray-200);
}

.btn-quiz-next {
    color: var(--white);
    background: var(--primary);
    margin-left: auto;
}

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

.btn-quiz-next:disabled {
    opacity: 0.5;
    cursor: not-allowed;
}

/* Quiz Results */
.quiz-result {
    text-align: center;
}

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

.result-title {
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--gray-900);
    margin-bottom: 0.5rem;
}

.result-subtitle {
    color: var(--gray-500);
    margin-bottom: 2rem;
}

.result-products {
    display: grid;
    gap: 1rem;
    margin-bottom: 2rem;
}

.result-product {
    display: flex;
    align-items: center;
    gap: 1rem;
    padding: 1rem;
    background: var(--gray-50);
    border-radius: var(--radius-lg);
    text-align: left;
}

.result-product-image {
    width: 80px;
    height: 80px;
    background: var(--white);
    border-radius: var(--radius);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 2rem;
    flex-shrink: 0;
}

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

.result-product-info h4 {
    font-size: 1rem;
    font-weight: 600;
    color: var(--gray-900);
    margin-bottom: 0.25rem;
}

.result-product-info p {
    font-size: 0.875rem;
    color: var(--gray-500);
    margin-bottom: 0.5rem;
}

.result-product .btn-amazon {
    white-space: nowrap;
}

.btn-retake {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    padding: 0.75rem 1.5rem;
    font-size: 0.875rem;
    font-weight: 500;
    color: var(--primary);
    background: transparent;
    border: 2px solid var(--primary);
    border-radius: var(--radius-lg);
    transition: var(--transition);
}

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

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

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

.compare-slot {
    min-height: 200px;
    border: 2px dashed var(--gray-300);
    border-radius: var(--radius-xl);
    display: flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    transition: var(--transition);
    background: var(--gray-50);
}

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

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

.slot-placeholder {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 0.5rem;
    color: var(--gray-400);
}

.plus-icon {
    font-size: 2rem;
    font-weight: 300;
}

.slot-content {
    width: 100%;
    padding: 1.5rem;
}

.slot-product {
    display: flex;
    flex-direction: column;
    align-items: center;
    text-align: center;
    position: relative;
}

.slot-remove {
    position: absolute;
    top: -0.5rem;
    right: -0.5rem;
    width: 24px;
    height: 24px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--error);
    color: var(--white);
    border-radius: var(--radius-full);
    font-size: 1rem;
    transition: var(--transition);
}

.slot-remove:hover {
    transform: scale(1.1);
}

.slot-product-image {
    width: 80px;
    height: 80px;
    background: var(--gray-100);
    border-radius: var(--radius);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 2rem;
    margin-bottom: 0.75rem;
}

.slot-product h4 {
    font-size: 0.875rem;
    font-weight: 600;
    color: var(--gray-900);
    margin-bottom: 0.25rem;
}

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

/* Compare Table */
.compare-table-wrapper {
    overflow-x: auto;
    background: var(--white);
    border-radius: var(--radius-xl);
    box-shadow: var(--shadow-lg);
    margin-top: 2rem;
}

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

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

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

.compare-table th:first-child,
.compare-table td:first-child {
    text-align: left;
    font-weight: 500;
    color: var(--gray-600);
    background: var(--gray-50);
}

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

.compare-check {
    color: var(--success);
    font-size: 1.25rem;
}

.compare-x {
    color: var(--gray-400);
    font-size: 1.25rem;
}

/* ===== Modal ===== */
.modal {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    z-index: 2000;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 1rem;
}

.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;
    width: 100%;
    max-width: 600px;
    max-height: 80vh;
    overflow-y: auto;
    background: var(--white);
    border-radius: var(--radius-xl);
    padding: 2rem;
    box-shadow: var(--shadow-xl);
}

.modal-close {
    position: absolute;
    top: 1rem;
    right: 1rem;
    width: 32px;
    height: 32px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.5rem;
    color: var(--gray-500);
    background: var(--gray-100);
    border-radius: var(--radius-full);
    transition: var(--transition);
}

.modal-close:hover {
    background: var(--gray-200);
    color: var(--gray-700);
}

.modal-title {
    font-size: 1.25rem;
    font-weight: 600;
    color: var(--gray-900);
    margin-bottom: 1.5rem;
}

.modal-products {
    display: grid;
    gap: 0.75rem;
}

.modal-product {
    display: flex;
    align-items: center;
    gap: 1rem;
    padding: 1rem;
    background: var(--gray-50);
    border: 2px solid transparent;
    border-radius: var(--radius-lg);
    cursor: pointer;
    transition: var(--transition);
}

.modal-product:hover {
    background: var(--white);
    border-color: var(--primary);
}

.modal-product-image {
    width: 50px;
    height: 50px;
    background: var(--white);
    border-radius: var(--radius);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.5rem;
    flex-shrink: 0;
}

.modal-product-info h4 {
    font-size: 0.875rem;
    font-weight: 600;
    color: var(--gray-900);
}

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

/* ===== Guide Section ===== */
.guide-section {
    padding: 5rem 0;
    background: var(--gray-50);
}

.guide-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 1.5rem;
}

.guide-card {
    background: var(--white);
    padding: 2rem;
    border-radius: var(--radius-xl);
    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: 1rem;
}

.guide-card h3 {
    font-size: 1.125rem;
    font-weight: 600;
    color: var(--gray-900);
    margin-bottom: 0.75rem;
}

.guide-card p {
    font-size: 0.875rem;
    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;
    color: var(--gray-900);
    margin-bottom: 1.5rem;
}

.seo-content h3 {
    font-size: 1.25rem;
    font-weight: 600;
    color: var(--gray-800);
    margin-top: 2rem;
    margin-bottom: 1rem;
}

.seo-content p {
    color: var(--gray-600);
    margin-bottom: 1rem;
    line-height: 1.8;
}

.seo-content strong {
    color: var(--gray-800);
}

.seo-content em {
    font-size: 0.875rem;
    color: var(--gray-500);
}

/* ===== Footer ===== */
.footer {
    background: var(--gray-900);
    color: var(--white);
    padding: 4rem 0 2rem;
}

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

.footer-brand p {
    color: var(--gray-400);
    margin-top: 1rem;
    max-width: 300px;
}

.footer-brand .logo {
    margin-bottom: 0.5rem;
}

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

.footer-column h4 {
    font-size: 0.875rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    color: var(--gray-400);
    margin-bottom: 1rem;
}

.footer-column a {
    display: block;
    color: var(--gray-300);
    padding: 0.375rem 0;
    transition: var(--transition-fast);
}

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

.footer-bottom {
    padding-top: 2rem;
    border-top: 1px solid var(--gray-800);
    display: flex;
    justify-content: space-between;
    align-items: center;
    flex-wrap: wrap;
    gap: 1rem;
}

.footer-bottom p {
    color: var(--gray-500);
    font-size: 0.875rem;
}

.affiliate-disclosure {
    font-size: 0.75rem !important;
    color: var(--gray-600) !important;
}

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

    .hero-subtitle {
        margin: 0 auto 2rem;
    }

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

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

    .hero-image {
        display: none;
    }

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

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

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

    .footer-brand p {
        max-width: none;
    }

    .footer-bottom {
        flex-direction: column;
        text-align: center;
    }
}

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

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

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

    .hero {
        padding: 6rem 0 3rem;
        min-height: auto;
    }

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

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

    .quiz-container {
        padding: 1.5rem;
    }

    .compare-selector {
        gap: 1rem;
    }

    .compare-slot {
        min-height: 150px;
    }

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

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

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

    .hero-stats {
        flex-direction: column;
        gap: 1rem;
    }

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

    .btn {
        width: 100%;
    }

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

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

    .product-actions {
        flex-direction: column;
    }

    .btn-compare {
        width: 100%;
    }

    .quiz-option {
        padding: 0.75rem 1rem;
    }

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

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