/* CSS Variables */
:root {
    --primary: #ff6b35;
    --primary-dark: #e55a2b;
    --secondary: #1a1a2e;
    --accent: #16213e;
    --background: #f8f9fa;
    --white: #ffffff;
    --gray-100: #f1f3f4;
    --gray-200: #e8eaed;
    --gray-300: #dadce0;
    --gray-400: #9aa0a6;
    --gray-500: #5f6368;
    --gray-600: #3c4043;
    --text-primary: #202124;
    --text-secondary: #5f6368;
    --success: #34a853;
    --warning: #fbbc04;
    --shadow-sm: 0 1px 2px 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: 16px;
    --transition: all 0.3s 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;
    background: var(--background);
    color: var(--text-primary);
    line-height: 1.6;
    overflow-x: hidden;
}

.container {
    max-width: 1280px;
    margin: 0 auto;
    padding: 0 24px;
}

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

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

ul {
    list-style: none;
}

/* Buttons */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: 14px 28px;
    font-size: 1rem;
    font-weight: 600;
    border-radius: var(--radius);
    border: none;
    cursor: pointer;
    transition: var(--transition);
    text-decoration: none;
}

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

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

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

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

.btn-amazon {
    background: #ff9900;
    color: #111;
    font-weight: 700;
}

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

/* Header */
.header {
    background: var(--white);
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 1000;
    box-shadow: var(--shadow-sm);
}

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

.logo {
    display: flex;
    align-items: center;
    gap: 10px;
    font-weight: 700;
    font-size: 1.25rem;
}

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

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

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

.nav-links a {
    font-weight: 500;
    color: var(--text-secondary);
    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: 8px;
}

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

/* Hero Section */
.hero {
    padding: 140px 0 80px;
    background: linear-gradient(135deg, var(--secondary) 0%, var(--accent) 100%);
    color: var(--white);
    overflow: hidden;
}

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

.hero-content h1 {
    font-size: 3.5rem;
    font-weight: 800;
    line-height: 1.1;
    margin-bottom: 24px;
}

.hero-content p {
    font-size: 1.25rem;
    opacity: 0.9;
    margin-bottom: 32px;
    max-width: 500px;
}

.hero-buttons {
    display: flex;
    gap: 16px;
    flex-wrap: wrap;
}

.hero-stats {
    display: flex;
    gap: 40px;
    margin-top: 48px;
    padding-top: 32px;
    border-top: 1px solid rgba(255,255,255,0.2);
}

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

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

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

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

.shoe-showcase {
    position: relative;
    width: 400px;
    height: 400px;
    display: flex;
    justify-content: center;
    align-items: center;
}

.floating-shoe {
    font-size: 200px;
    animation: float 3s ease-in-out infinite;
    filter: drop-shadow(0 20px 40px rgba(0,0,0,0.3));
}

@keyframes float {
    0%, 100% { transform: translateY(0) rotate(-5deg); }
    50% { transform: translateY(-20px) rotate(5deg); }
}

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

.section-header h2 {
    font-size: 2.5rem;
    font-weight: 800;
    margin-bottom: 12px;
    color: var(--secondary);
}

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

.section-header.light h2 {
    color: var(--white);
}

.section-header.light p {
    color: rgba(255,255,255,0.8);
}

/* View Controls */
.view-controls {
    padding-top: 80px;
}

.controls {
    display: flex;
    justify-content: space-between;
    align-items: center;
    flex-wrap: wrap;
    gap: 20px;
    margin-bottom: 32px;
}

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

.filter-btn {
    padding: 10px 20px;
    background: var(--white);
    border: 2px solid var(--gray-200);
    border-radius: 100px;
    font-weight: 500;
    cursor: pointer;
    transition: var(--transition);
}

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

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

.view-toggle {
    display: flex;
    background: var(--white);
    border-radius: var(--radius);
    padding: 4px;
    box-shadow: var(--shadow-sm);
}

.view-btn {
    padding: 10px 16px;
    background: transparent;
    border: none;
    border-radius: 8px;
    cursor: pointer;
    color: var(--gray-500);
    transition: var(--transition);
    display: flex;
    align-items: center;
    justify-content: center;
}

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

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

/* Products Grid */
.products-section {
    padding-bottom: 80px;
}

.products-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
    gap: 24px;
}

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

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

.product-badge {
    position: absolute;
    top: 16px;
    left: 16px;
    background: var(--primary);
    color: var(--white);
    padding: 6px 12px;
    border-radius: 100px;
    font-size: 0.75rem;
    font-weight: 600;
    z-index: 1;
}

.product-image {
    height: 200px;
    background: linear-gradient(135deg, var(--gray-100) 0%, var(--gray-200) 100%);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 80px;
    position: relative;
}

.compare-checkbox {
    position: absolute;
    top: 12px;
    right: 12px;
    width: 28px;
    height: 28px;
    background: var(--white);
    border: 2px solid var(--gray-300);
    border-radius: 6px;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: var(--transition);
}

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

.compare-checkbox.checked {
    background: var(--primary);
    border-color: var(--primary);
}

.compare-checkbox.checked::after {
    content: '✓';
    color: var(--white);
    font-weight: 700;
}

.product-info {
    padding: 20px;
}

.product-brand {
    font-size: 0.875rem;
    color: var(--primary);
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.5px;
    margin-bottom: 4px;
}

.product-name {
    font-size: 1.125rem;
    font-weight: 700;
    margin-bottom: 8px;
    color: var(--secondary);
}

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

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

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

.product-features {
    display: flex;
    flex-wrap: wrap;
    gap: 6px;
    margin-bottom: 16px;
}

.feature-tag {
    background: var(--gray-100);
    padding: 4px 10px;
    border-radius: 100px;
    font-size: 0.75rem;
    color: var(--gray-600);
}

.product-price {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding-top: 16px;
    border-top: 1px solid var(--gray-200);
}

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

.price-currency {
    font-size: 1rem;
    font-weight: 600;
}

.btn-buy {
    padding: 10px 20px;
    font-size: 0.875rem;
}

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

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

.products-table th,
.products-table td {
    padding: 16px 20px;
    text-align: left;
    border-bottom: 1px solid var(--gray-200);
}

.products-table th {
    background: var(--gray-100);
    font-weight: 600;
    color: var(--text-secondary);
    font-size: 0.875rem;
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

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

.table-product {
    display: flex;
    align-items: center;
    gap: 16px;
}

.table-product-image {
    width: 60px;
    height: 60px;
    background: var(--gray-100);
    border-radius: var(--radius);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 32px;
}

.table-product-info h4 {
    font-weight: 600;
    margin-bottom: 2px;
}

.table-product-info span {
    font-size: 0.875rem;
    color: var(--primary);
}

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

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

.quiz-progress {
    margin-bottom: 32px;
}

.progress-bar {
    height: 8px;
    background: var(--gray-200);
    border-radius: 100px;
    overflow: hidden;
    margin-bottom: 12px;
}

.progress-fill {
    height: 100%;
    background: linear-gradient(90deg, var(--primary) 0%, #ff9500 100%);
    border-radius: 100px;
    transition: width 0.4s ease;
    width: 20%;
}

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

.quiz-question {
    margin-bottom: 24px;
}

.quiz-question h3 {
    font-size: 1.5rem;
    margin-bottom: 24px;
    color: var(--secondary);
}

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

.quiz-option {
    padding: 16px 20px;
    background: var(--gray-100);
    border: 2px solid transparent;
    border-radius: var(--radius);
    cursor: pointer;
    transition: var(--transition);
    font-size: 1rem;
    text-align: left;
    display: flex;
    align-items: center;
    gap: 12px;
}

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

.quiz-option.selected {
    border-color: var(--primary);
    background: rgba(255, 107, 53, 0.1);
}

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

.quiz-nav {
    display: flex;
    justify-content: space-between;
    margin-top: 32px;
    padding-top: 24px;
    border-top: 1px solid var(--gray-200);
}

.quiz-nav button {
    padding: 12px 24px;
}

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

.quiz-result h3 {
    font-size: 1.75rem;
    margin-bottom: 16px;
    color: var(--secondary);
}

.quiz-result p {
    color: var(--text-secondary);
    margin-bottom: 32px;
}

.recommended-shoes {
    display: grid;
    gap: 20px;
}

.recommended-shoe {
    display: flex;
    align-items: center;
    gap: 20px;
    padding: 20px;
    background: var(--gray-100);
    border-radius: var(--radius);
    text-align: left;
}

.recommended-shoe-image {
    width: 80px;
    height: 80px;
    background: var(--white);
    border-radius: var(--radius);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 40px;
}

.recommended-shoe-info {
    flex: 1;
}

.recommended-shoe-info h4 {
    font-weight: 600;
    margin-bottom: 4px;
}

.recommended-shoe-info p {
    font-size: 0.875rem;
    color: var(--text-secondary);
    margin-bottom: 0;
}

.match-score {
    background: var(--success);
    color: var(--white);
    padding: 6px 12px;
    border-radius: 100px;
    font-size: 0.875rem;
    font-weight: 600;
}

/* Compare Section */
.compare-section {
    padding: 80px 0;
    background: var(--gray-100);
}

.compare-slots {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 24px;
    margin-bottom: 40px;
}

.compare-slot {
    min-height: 300px;
}

.add-compare-btn {
    width: 100%;
    height: 100%;
    min-height: 300px;
    background: var(--white);
    border: 3px dashed var(--gray-300);
    border-radius: var(--radius-lg);
    cursor: pointer;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    gap: 12px;
    color: var(--text-secondary);
    transition: var(--transition);
}

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

.plus-icon {
    width: 60px;
    height: 60px;
    background: var(--gray-100);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 2rem;
    font-weight: 300;
}

.compare-shoe-card {
    background: var(--white);
    border-radius: var(--radius-lg);
    padding: 20px;
    box-shadow: var(--shadow);
    height: 100%;
    position: relative;
}

.remove-compare {
    position: absolute;
    top: 12px;
    right: 12px;
    width: 32px;
    height: 32px;
    background: var(--gray-100);
    border: none;
    border-radius: 50%;
    cursor: pointer;
    font-size: 1.25rem;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: var(--transition);
}

.remove-compare:hover {
    background: #ff4444;
    color: var(--white);
}

.compare-shoe-image {
    height: 120px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 60px;
    margin-bottom: 16px;
}

.compare-shoe-info h4 {
    font-size: 1rem;
    margin-bottom: 4px;
}

.compare-shoe-info .brand {
    color: var(--primary);
    font-size: 0.875rem;
    font-weight: 600;
}

.compare-shoe-info .price {
    font-size: 1.25rem;
    margin-top: 12px;
}

.compare-table-container {
    background: var(--white);
    border-radius: var(--radius-lg);
    overflow: hidden;
    box-shadow: var(--shadow);
}

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

.compare-table th,
.compare-table td {
    padding: 16px 24px;
    text-align: center;
    border-bottom: 1px solid var(--gray-200);
}

.compare-table th:first-child,
.compare-table td:first-child {
    text-align: left;
    background: var(--gray-100);
    font-weight: 600;
}

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

.compare-table th:first-child {
    background: var(--secondary);
    color: var(--white);
}

/* Modal */
.modal {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: rgba(0,0,0,0.5);
    display: none;
    align-items: center;
    justify-content: center;
    z-index: 2000;
    padding: 20px;
}

.modal.active {
    display: flex;
}

.modal-content {
    background: var(--white);
    border-radius: var(--radius-lg);
    width: 100%;
    max-width: 500px;
    max-height: 80vh;
    overflow: hidden;
    display: flex;
    flex-direction: column;
}

.modal-content h3 {
    padding: 24px 24px 0;
    font-size: 1.25rem;
}

.modal-close {
    position: absolute;
    top: 16px;
    right: 16px;
    background: none;
    border: none;
    font-size: 2rem;
    cursor: pointer;
    color: var(--gray-500);
    line-height: 1;
}

.modal-close:hover {
    color: var(--text-primary);
}

.modal-search {
    padding: 16px 24px;
}

.modal-search input {
    width: 100%;
    padding: 12px 16px;
    border: 2px solid var(--gray-200);
    border-radius: var(--radius);
    font-size: 1rem;
    transition: var(--transition);
}

.modal-search input:focus {
    outline: none;
    border-color: var(--primary);
}

.modal-shoes {
    padding: 0 24px 24px;
    overflow-y: auto;
    display: flex;
    flex-direction: column;
    gap: 8px;
}

.modal-shoe-item {
    display: flex;
    align-items: center;
    gap: 16px;
    padding: 12px;
    border-radius: var(--radius);
    cursor: pointer;
    transition: var(--transition);
}

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

.modal-shoe-icon {
    width: 50px;
    height: 50px;
    background: var(--gray-100);
    border-radius: var(--radius);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 28px;
}

.modal-shoe-info h4 {
    font-weight: 600;
    font-size: 0.9rem;
}

.modal-shoe-info span {
    font-size: 0.8rem;
    color: var(--primary);
}

/* SEO Section */
.seo-section {
    padding: 80px 0;
    background: var(--white);
}

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

.seo-content h2 {
    font-size: 2rem;
    color: var(--secondary);
    margin-bottom: 24px;
}

.seo-content h3 {
    font-size: 1.5rem;
    color: var(--secondary);
    margin-top: 32px;
    margin-bottom: 16px;
}

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

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

/* Footer */
.footer {
    background: var(--secondary);
    color: var(--white);
    padding: 60px 0 0;
}

.footer-content {
    display: grid;
    grid-template-columns: 1.5fr 2fr;
    gap: 60px;
    padding-bottom: 40px;
}

.footer-brand p {
    margin-top: 16px;
    opacity: 0.8;
    max-width: 300px;
}

.footer-links {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 40px;
}

.footer-column h4 {
    font-size: 0.875rem;
    text-transform: uppercase;
    letter-spacing: 1px;
    margin-bottom: 20px;
    opacity: 0.6;
}

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

.footer-column a {
    opacity: 0.8;
    transition: var(--transition);
}

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

.footer-bottom {
    border-top: 1px solid rgba(255,255,255,0.1);
    padding: 24px 0;
    display: flex;
    justify-content: space-between;
    align-items: center;
    flex-wrap: wrap;
    gap: 16px;
}

.footer-bottom p {
    opacity: 0.6;
    font-size: 0.875rem;
}

.affiliate-disclosure {
    font-size: 0.75rem !important;
    opacity: 0.5 !important;
}

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

    .hero-content p {
        max-width: 100%;
    }

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

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

    .hero-image {
        display: none;
    }

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

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

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

@media (max-width: 768px) {
    .nav-links {
        position: fixed;
        top: 72px;
        left: 0;
        right: 0;
        background: var(--white);
        flex-direction: column;
        padding: 24px;
        gap: 16px;
        box-shadow: var(--shadow-lg);
        transform: translateY(-100%);
        opacity: 0;
        visibility: hidden;
        transition: var(--transition);
    }

    .nav-links.active {
        transform: translateY(0);
        opacity: 1;
        visibility: visible;
    }

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

    .mobile-menu-btn.active span:nth-child(1) {
        transform: rotate(45deg) translate(5px, 5px);
    }

    .mobile-menu-btn.active span:nth-child(2) {
        opacity: 0;
    }

    .mobile-menu-btn.active span:nth-child(3) {
        transform: rotate(-45deg) translate(5px, -5px);
    }

    .hero {
        padding: 120px 0 60px;
    }

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

    .hero-content p {
        font-size: 1rem;
    }

    .hero-stats {
        flex-direction: column;
        gap: 24px;
        align-items: center;
    }

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

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

    .filter-buttons {
        overflow-x: auto;
        padding-bottom: 8px;
        flex-wrap: nowrap;
    }

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

    .view-toggle {
        align-self: flex-end;
    }

    .quiz-container {
        padding: 24px;
    }

    .quiz-question h3 {
        font-size: 1.25rem;
    }

    .footer-links {
        grid-template-columns: 1fr;
        gap: 32px;
    }

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

    .products-table {
        overflow-x: auto;
    }

    .products-table table {
        min-width: 700px;
    }
}

@media (max-width: 480px) {
    .container {
        padding: 0 16px;
    }

    .btn {
        padding: 12px 20px;
        font-size: 0.9rem;
    }

    .hero-content h1 {
        font-size: 1.875rem;
    }

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

    .product-image {
        height: 180px;
    }

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

    .quiz-nav button {
        width: 100%;
    }
}

/* Animation Classes */
.fade-in {
    animation: fadeIn 0.5s ease forwards;
}

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

/* Accessibility */
:focus-visible {
    outline: 3px solid var(--primary);
    outline-offset: 2px;
}

.sr-only {
    position: absolute;
    width: 1px;
    height: 1px;
    padding: 0;
    margin: -1px;
    overflow: hidden;
    clip: rect(0, 0, 0, 0);
    white-space: nowrap;
    border-width: 0;
}