/* CSS Variables */
:root {
    --primary: #6366f1;
    --primary-dark: #4f46e5;
    --primary-light: #818cf8;
    --secondary: #0ea5e9;
    --accent: #f59e0b;
    --success: #22c55e;
    --warning: #f59e0b;
    --danger: #ef4444;
    --dark: #0f172a;
    --dark-light: #1e293b;
    --gray-900: #111827;
    --gray-800: #1f2937;
    --gray-700: #374151;
    --gray-600: #4b5563;
    --gray-500: #6b7280;
    --gray-400: #9ca3af;
    --gray-300: #d1d5db;
    --gray-200: #e5e7eb;
    --gray-100: #f3f4f6;
    --gray-50: #f9fafb;
    --white: #ffffff;
    --gradient-primary: linear-gradient(135deg, var(--primary) 0%, var(--secondary) 100%);
    --gradient-dark: linear-gradient(135deg, var(--dark) 0%, var(--dark-light) 100%);
    --shadow-sm: 0 1px 2px 0 rgb(0 0 0 / 0.05);
    --shadow: 0 1px 3px 0 rgb(0 0 0 / 0.1), 0 1px 2px -1px rgb(0 0 0 / 0.1);
    --shadow-md: 0 4px 6px -1px rgb(0 0 0 / 0.1), 0 2px 4px -2px rgb(0 0 0 / 0.1);
    --shadow-lg: 0 10px 15px -3px rgb(0 0 0 / 0.1), 0 4px 6px -4px rgb(0 0 0 / 0.1);
    --shadow-xl: 0 20px 25px -5px rgb(0 0 0 / 0.1), 0 8px 10px -6px rgb(0 0 0 / 0.1);
    --radius-sm: 0.375rem;
    --radius: 0.5rem;
    --radius-lg: 0.75rem;
    --radius-xl: 1rem;
    --radius-2xl: 1.5rem;
    --transition: all 0.3s ease;
}

/* Reset */
*, *::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;
    line-height: 1.6;
    color: var(--gray-800);
    background: var(--white);
    overflow-x: hidden;
}

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

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

ul {
    list-style: none;
}

/* Container */
.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 1.5rem;
}

/* Buttons */
.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);
    border: none;
    cursor: pointer;
    transition: var(--transition);
    text-decoration: none;
}

.btn-primary {
    background: var(--gradient-primary);
    color: var(--white);
    box-shadow: 0 4px 14px 0 rgba(99, 102, 241, 0.39);
}

.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 6px 20px 0 rgba(99, 102, 241, 0.5);
}

.btn-secondary {
    background: var(--white);
    color: var(--gray-800);
    border: 2px solid var(--gray-200);
}

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

.btn-amazon {
    background: #ff9900;
    color: var(--dark);
    font-weight: 700;
}

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

.btn-sm {
    padding: 0.5rem 1rem;
    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);
    border-bottom: 1px solid var(--gray-200);
    transition: var(--transition);
}

.navbar.scrolled {
    box-shadow: var(--shadow-md);
}

.nav-container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 1rem 1.5rem;
    display: flex;
    align-items: center;
    justify-content: space-between;
}

.logo {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    font-size: 1.5rem;
    font-weight: 800;
}

.logo-icon {
    font-size: 1.75rem;
}

.logo-text {
    color: var(--gray-900);
}

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

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

.nav-links a {
    font-weight: 500;
    color: var(--gray-600);
    transition: var(--transition);
    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;
    background: none;
    border: none;
    cursor: pointer;
    padding: 0.5rem;
}

.mobile-menu-btn span {
    width: 24px;
    height: 2px;
    background: var(--gray-800);
    transition: var(--transition);
}

/* Hero Section */
.hero {
    padding: 8rem 1.5rem 4rem;
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    background: linear-gradient(135deg, var(--gray-50) 0%, var(--white) 50%, #ede9fe 100%);
    position: relative;
    overflow: hidden;
}

.hero::before {
    content: '';
    position: absolute;
    top: -50%;
    right: -20%;
    width: 60%;
    height: 100%;
    background: radial-gradient(circle, rgba(99, 102, 241, 0.1) 0%, transparent 70%);
    border-radius: 50%;
}

.hero-content {
    max-width: 600px;
    z-index: 1;
}

.hero h1 {
    font-size: clamp(2.5rem, 5vw, 4rem);
    font-weight: 800;
    line-height: 1.1;
    color: var(--gray-900);
    margin-bottom: 1.5rem;
}

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

.hero-subtitle {
    font-size: 1.25rem;
    color: var(--gray-600);
    margin-bottom: 2rem;
    line-height: 1.7;
}

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

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

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

.stat-number {
    font-size: 2rem;
    font-weight: 800;
    color: var(--gray-900);
}

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

.hero-visual {
    position: relative;
    z-index: 1;
}

.hero-image-container {
    position: relative;
    width: 300px;
    height: 300px;
    display: flex;
    align-items: center;
    justify-content: center;
}

.pulse-ring {
    position: absolute;
    width: 100%;
    height: 100%;
    border-radius: 50%;
    background: rgba(99, 102, 241, 0.1);
    animation: pulse 2s ease-in-out infinite;
}

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

.hero-icon {
    font-size: 8rem;
    filter: drop-shadow(0 10px 30px rgba(0, 0, 0, 0.1));
}

/* Features Banner */
.features-banner {
    background: var(--gradient-dark);
    padding: 1.5rem 0;
}

.features-banner .container {
    display: flex;
    justify-content: space-around;
    flex-wrap: wrap;
    gap: 1.5rem;
}

.feature-item {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    color: var(--white);
}

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

.feature-text {
    font-weight: 500;
    font-size: 0.9rem;
}

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

.section-header h2 {
    font-size: clamp(1.75rem, 3vw, 2.5rem);
    font-weight: 800;
    color: var(--gray-900);
    margin-bottom: 0.75rem;
}

.section-header p {
    font-size: 1.1rem;
    color: var(--gray-500);
}

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

.filter-tabs {
    display: flex;
    justify-content: center;
    gap: 0.5rem;
    margin-bottom: 2rem;
    flex-wrap: wrap;
}

.filter-tab {
    padding: 0.75rem 1.5rem;
    background: var(--white);
    border: 2px solid var(--gray-200);
    border-radius: var(--radius-lg);
    font-weight: 500;
    color: var(--gray-600);
    cursor: pointer;
    transition: var(--transition);
}

.filter-tab:hover,
.filter-tab.active {
    border-color: var(--primary);
    color: var(--primary);
    background: rgba(99, 102, 241, 0.05);
}

.products-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(320px, 1fr));
    gap: 2rem;
}

/* Product Card */
.product-card {
    background: var(--white);
    border-radius: var(--radius-xl);
    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 0.75rem;
    background: var(--gradient-primary);
    color: var(--white);
    font-size: 0.75rem;
    font-weight: 600;
    border-radius: var(--radius);
    z-index: 10;
}

.product-badge.sale {
    background: var(--danger);
}

.product-image {
    height: 200px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--gray-100);
    font-size: 5rem;
}

.product-content {
    padding: 1.5rem;
}

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

.product-name {
    font-size: 1.25rem;
    font-weight: 700;
    color: var(--gray-900);
    margin-bottom: 0.5rem;
}

.product-rating {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    margin-bottom: 0.75rem;
}

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

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

.product-features {
    margin-bottom: 1rem;
}

.product-features li {
    font-size: 0.875rem;
    color: var(--gray-600);
    padding: 0.25rem 0;
    padding-left: 1.25rem;
    position: relative;
}

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

.product-footer {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding-top: 1rem;
    border-top: 1px solid var(--gray-200);
}

.product-price {
    font-size: 1.5rem;
    font-weight: 800;
    color: var(--gray-900);
}

.product-price .original {
    font-size: 0.875rem;
    color: var(--gray-400);
    text-decoration: line-through;
    margin-left: 0.5rem;
    font-weight: 400;
}

.compare-checkbox {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    font-size: 0.875rem;
    color: var(--gray-600);
    cursor: pointer;
}

.compare-checkbox input {
    width: 18px;
    height: 18px;
    accent-color: var(--primary);
}

/* Quiz Section */
.quiz-section {
    padding: 5rem 0;
    background: var(--white);
}

.quiz-container {
    max-width: 700px;
    margin: 0 auto;
    background: var(--gray-50);
    border-radius: var(--radius-2xl);
    padding: 2.5rem;
    box-shadow: var(--shadow-lg);
}

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

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

.progress-fill {
    height: 100%;
    background: var(--gradient-primary);
    border-radius: var(--radius);
    transition: width 0.4s ease;
    width: 20%;
}

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

.quiz-question {
    margin-bottom: 1.5rem;
}

.quiz-question h3 {
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--gray-900);
    margin-bottom: 1.5rem;
}

.quiz-options {
    display: flex;
    flex-direction: column;
    gap: 0.75rem;
}

.quiz-option {
    padding: 1rem 1.5rem;
    background: var(--white);
    border: 2px solid var(--gray-200);
    border-radius: var(--radius-lg);
    cursor: pointer;
    transition: var(--transition);
    display: flex;
    align-items: center;
    gap: 1rem;
}

.quiz-option:hover {
    border-color: var(--primary);
    background: rgba(99, 102, 241, 0.05);
}

.quiz-option.selected {
    border-color: var(--primary);
    background: rgba(99, 102, 241, 0.1);
}

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

.quiz-option-text {
    font-weight: 500;
    color: var(--gray-700);
}

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

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

.quiz-result.hidden {
    display: none;
}

.quiz-result h3 {
    font-size: 1.75rem;
    font-weight: 700;
    color: var(--gray-900);
    margin-bottom: 1rem;
}

.result-product {
    background: var(--white);
    border-radius: var(--radius-xl);
    padding: 2rem;
    margin: 1.5rem 0;
    box-shadow: var(--shadow-md);
}

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

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

.result-product-price {
    font-size: 1.25rem;
    font-weight: 600;
    color: var(--primary);
    margin-bottom: 1rem;
}

.result-match {
    display: inline-block;
    padding: 0.5rem 1rem;
    background: var(--success);
    color: var(--white);
    border-radius: var(--radius);
    font-weight: 600;
    font-size: 0.875rem;
    margin-bottom: 1rem;
}

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

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

.compare-slot {
    position: relative;
}

.compare-select {
    width: 100%;
    padding: 1rem;
    background: var(--white);
    border: 2px solid var(--gray-200);
    border-radius: var(--radius-lg);
    font-size: 1rem;
    color: var(--gray-700);
    cursor: pointer;
    transition: var(--transition);
    appearance: none;
    background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' fill='none' viewBox='0 0 24 24' stroke='%236b7280'%3E%3Cpath stroke-linecap='round' stroke-linejoin='round' stroke-width='2' d='M19 9l-7 7-7-7'%3E%3C/path%3E%3C/svg%3E");
    background-repeat: no-repeat;
    background-position: right 1rem center;
    background-size: 1.25rem;
}

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

.compare-table-wrapper {
    overflow-x: auto;
    background: var(--white);
    border-radius: var(--radius-xl);
    box-shadow: var(--shadow-lg);
}

.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: 700;
    color: var(--gray-900);
}

.compare-table th:first-child,
.compare-table td:first-child {
    text-align: left;
    font-weight: 600;
    color: var(--gray-700);
    background: var(--gray-50);
}

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

.compare-table .highlight-cell {
    background: rgba(99, 102, 241, 0.1);
    color: var(--primary);
    font-weight: 600;
}

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

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

/* Benefits Section */
.benefits-section {
    padding: 5rem 0;
    background: var(--white);
}

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

.benefit-card {
    text-align: center;
    padding: 2rem;
    background: var(--gray-50);
    border-radius: var(--radius-xl);
    transition: var(--transition);
}

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

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

.benefit-card h3 {
    font-size: 1.25rem;
    font-weight: 700;
    color: var(--gray-900);
    margin-bottom: 0.75rem;
}

.benefit-card p {
    color: var(--gray-600);
    font-size: 0.95rem;
}

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

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

.seo-content h2 {
    font-size: 2rem;
    font-weight: 800;
    color: var(--gray-900);
    margin-bottom: 1.5rem;
}

.seo-content h3 {
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--gray-800);
    margin-top: 2rem;
    margin-bottom: 1rem;
}

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

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

/* Newsletter Section */
.newsletter-section {
    padding: 4rem 0;
    background: var(--gradient-primary);
}

.newsletter-content {
    text-align: center;
    max-width: 500px;
    margin: 0 auto;
}

.newsletter-content h2 {
    font-size: 2rem;
    font-weight: 800;
    color: var(--white);
    margin-bottom: 0.75rem;
}

.newsletter-content p {
    color: rgba(255, 255, 255, 0.9);
    margin-bottom: 1.5rem;
}

.newsletter-form {
    display: flex;
    gap: 0.75rem;
    flex-wrap: wrap;
    justify-content: center;
}

.newsletter-form input {
    flex: 1;
    min-width: 250px;
    padding: 1rem 1.25rem;
    border: none;
    border-radius: var(--radius-lg);
    font-size: 1rem;
}

.newsletter-form input:focus {
    outline: none;
    box-shadow: 0 0 0 3px rgba(255, 255, 255, 0.3);
}

.newsletter-form .btn {
    background: var(--dark);
    color: var(--white);
}

.newsletter-form .btn:hover {
    background: var(--gray-800);
}

/* Footer */
.footer {
    background: var(--dark);
    color: var(--gray-300);
    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;
    font-size: 0.9rem;
    line-height: 1.7;
}

.footer-links h4 {
    font-size: 1rem;
    font-weight: 700;
    color: var(--white);
    margin-bottom: 1.25rem;
}

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

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

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

.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);
    max-width: 700px;
    margin: 0 auto;
}

/* Responsive Styles */
@media (max-width: 1024px) {
    .hero {
        flex-direction: column;
        text-align: center;
        padding-top: 6rem;
    }

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

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

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

@media (max-width: 768px) {
    .nav-links {
        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-links.active {
        display: flex;
    }

    .nav-links li {
        width: 100%;
    }

    .nav-links a {
        display: block;
        padding: 0.75rem;
        border-radius: var(--radius);
    }

    .nav-links a:hover {
        background: var(--gray-100);
    }

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

    .hero-image-container {
        width: 200px;
        height: 200px;
    }

    .hero-icon {
        font-size: 5rem;
    }

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

    .compare-table {
        font-size: 0.875rem;
    }

    .compare-table th,
    .compare-table td {
        padding: 0.75rem;
    }

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

    .footer-brand {
        order: -1;
    }
}

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

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

    .hero-stats {
        gap: 1.5rem;
    }

    .quiz-container {
        padding: 1.5rem;
    }

    .filter-tabs {
        flex-direction: column;
        align-items: stretch;
    }

    .filter-tab {
        text-align: center;
    }
}

/* Animation Classes */
.fade-in {
    animation: fadeIn 0.6s ease forwards;
}

@keyframes fadeIn {
    from {
        opacity: 0;
        transform: translateY(20px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.slide-up {
    animation: slideUp 0.5s ease forwards;
}

@keyframes slideUp {
    from {
        opacity: 0;
        transform: translateY(30px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

/* Utility Classes */
.hidden {
    display: none !important;
}

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

.mt-2 {
    margin-top: 2rem;
}

.mb-2 {
    margin-bottom: 2rem;
}