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

:root {
    --color-primary: #2C1810;
    --color-secondary: #8B4513;
    --color-accent: #D4A574;
    --color-light: #F5F0EB;
    --color-white: #FFFFFF;
    --color-text: #333333;
    --color-text-light: #666666;
    --color-border: #E5E5E5;
    --color-success: #28A745;
    --color-badge-premium: #9B59B6;
    --color-badge-value: #27AE60;

    --font-primary: 'Inter', -apple-system, BlinkMacSystemFont, sans-serif;
    --font-heading: 'Playfair Display', Georgia, serif;

    --shadow-sm: 0 2px 4px rgba(0,0,0,0.08);
    --shadow-md: 0 4px 12px rgba(0,0,0,0.1);
    --shadow-lg: 0 8px 24px rgba(0,0,0,0.12);
    --shadow-hover: 0 12px 32px rgba(0,0,0,0.15);

    --radius-sm: 8px;
    --radius-md: 12px;
    --radius-lg: 16px;
    --radius-xl: 24px;

    --transition: all 0.3s ease;
}

html {
    scroll-behavior: smooth;
}

body {
    font-family: var(--font-primary);
    font-size: 16px;
    line-height: 1.6;
    color: var(--color-text);
    background-color: var(--color-white);
}

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

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

ul {
    list-style: none;
}

.container {
    width: 100%;
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 20px;
}

/* Header */
.header {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 1000;
    background: rgba(255, 255, 255, 0.98);
    backdrop-filter: blur(10px);
    border-bottom: 1px solid transparent;
    transition: var(--transition);
}

.header.scrolled {
    border-bottom-color: var(--color-border);
    box-shadow: var(--shadow-sm);
}

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

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

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

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

.nav-list {
    display: flex;
    align-items: center;
    gap: 32px;
}

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

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

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

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

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

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

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

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

.btn-buy {
    width: 100%;
    background: linear-gradient(135deg, #FF9900 0%, #FF6600 100%);
    color: var(--color-white);
    padding: 12px 24px;
}

.btn-buy:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow-md);
    filter: brightness(1.05);
}

/* Hero Section */
.hero {
    padding: 140px 0 80px;
    background: linear-gradient(135deg, var(--color-light) 0%, var(--color-white) 100%);
    text-align: center;
}

.hero-content {
    max-width: 700px;
    margin: 0 auto;
}

.hero h1 {
    font-family: var(--font-heading);
    font-size: clamp(2.5rem, 5vw, 3.5rem);
    font-weight: 700;
    color: var(--color-primary);
    margin-bottom: 20px;
    line-height: 1.2;
}

.hero p {
    font-size: 1.2rem;
    color: var(--color-text-light);
    margin-bottom: 32px;
}

/* Section Styles */
.section-title {
    font-family: var(--font-heading);
    font-size: clamp(1.75rem, 4vw, 2.5rem);
    font-weight: 700;
    color: var(--color-primary);
    text-align: center;
    margin-bottom: 16px;
}

.section-subtitle {
    text-align: center;
    color: var(--color-text-light);
    font-size: 1.1rem;
    margin-bottom: 48px;
}

/* Categories Section */
.categories {
    padding: 80px 0;
    background: var(--color-white);
}

.category-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
    gap: 24px;
    margin-top: 40px;
}

.category-card {
    background: var(--color-light);
    padding: 32px 24px;
    border-radius: var(--radius-lg);
    text-align: center;
    transition: var(--transition);
}

.category-card:hover {
    background: var(--color-white);
    box-shadow: var(--shadow-lg);
    transform: translateY(-4px);
}

.category-icon {
    font-size: 3rem;
    margin-bottom: 16px;
}

.category-card h3 {
    font-size: 1.25rem;
    font-weight: 600;
    color: var(--color-primary);
    margin-bottom: 8px;
}

.category-card p {
    color: var(--color-text-light);
    font-size: 0.95rem;
}

/* Products Section */
.products {
    padding: 80px 0;
    background: var(--color-light);
}

.product-category {
    margin-bottom: 64px;
}

.product-category:last-child {
    margin-bottom: 0;
}

.category-title {
    font-family: var(--font-heading);
    font-size: 1.5rem;
    font-weight: 600;
    color: var(--color-primary);
    margin-bottom: 32px;
    padding-bottom: 12px;
    border-bottom: 2px solid var(--color-accent);
}

.product-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
    gap: 32px;
}

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

.product-card:hover {
    box-shadow: var(--shadow-hover);
    transform: translateY(-6px);
}

.product-badge {
    position: absolute;
    top: 16px;
    left: 16px;
    background: var(--color-secondary);
    color: var(--color-white);
    padding: 6px 14px;
    font-size: 0.8rem;
    font-weight: 600;
    border-radius: 20px;
    z-index: 10;
}

.product-badge.premium {
    background: var(--color-badge-premium);
}

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

.product-image {
    position: relative;
    height: 220px;
    overflow: hidden;
    background: var(--color-light);
}

.product-image img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: var(--transition);
}

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

.product-content {
    padding: 24px;
}

.product-content h4 {
    font-size: 1.2rem;
    font-weight: 600;
    color: var(--color-primary);
    margin-bottom: 8px;
}

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

.stars {
    color: #FFC107;
    letter-spacing: 2px;
}

.rating-count {
    font-size: 0.85rem;
    color: var(--color-text-light);
}

.product-description {
    color: var(--color-text-light);
    font-size: 0.95rem;
    margin-bottom: 16px;
    line-height: 1.5;
}

.product-features {
    margin-bottom: 20px;
}

.product-features li {
    position: relative;
    padding-left: 20px;
    margin-bottom: 6px;
    font-size: 0.9rem;
    color: var(--color-text);
}

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

.product-price {
    display: flex;
    align-items: baseline;
    gap: 8px;
    margin-bottom: 16px;
}

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

.price-note {
    font-size: 0.85rem;
    color: var(--color-text-light);
}

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

.guide-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
    gap: 32px;
    margin-top: 40px;
}

.guide-card {
    background: var(--color-light);
    padding: 32px;
    border-radius: var(--radius-lg);
    text-align: center;
    transition: var(--transition);
}

.guide-card:hover {
    background: var(--color-white);
    box-shadow: var(--shadow-md);
}

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

.guide-card h3 {
    font-size: 1.2rem;
    font-weight: 600;
    color: var(--color-primary);
    margin-bottom: 12px;
}

.guide-card p {
    color: var(--color-text-light);
    font-size: 0.95rem;
    line-height: 1.6;
}

/* SEO Content Section */
.seo-content {
    padding: 80px 0;
    background: linear-gradient(135deg, var(--color-primary) 0%, #1a0f0a 100%);
    color: var(--color-white);
}

.seo-content h2 {
    font-family: var(--font-heading);
    font-size: clamp(1.5rem, 3vw, 2rem);
    font-weight: 600;
    margin-bottom: 32px;
    text-align: center;
    color: var(--color-accent);
}

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

.seo-text p {
    margin-bottom: 20px;
    line-height: 1.8;
    color: rgba(255, 255, 255, 0.9);
    font-size: 1rem;
}

.seo-text p:last-child {
    margin-bottom: 0;
}

/* Footer */
.footer {
    background: var(--color-primary);
    color: var(--color-white);
    padding: 64px 0 32px;
}

.footer-grid {
    display: grid;
    grid-template-columns: 2fr 1fr 1fr 1.5fr;
    gap: 48px;
    margin-bottom: 48px;
}

.footer-brand .logo {
    margin-bottom: 16px;
    color: var(--color-white);
}

.footer-brand p {
    color: rgba(255, 255, 255, 0.7);
    font-size: 0.95rem;
    line-height: 1.6;
}

.footer-links h4,
.footer-contact h4 {
    font-size: 1rem;
    font-weight: 600;
    margin-bottom: 20px;
    color: var(--color-accent);
}

.footer-links ul li {
    margin-bottom: 12px;
}

.footer-links a {
    color: rgba(255, 255, 255, 0.7);
    font-size: 0.95rem;
}

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

.footer-contact p {
    color: rgba(255, 255, 255, 0.7);
    font-size: 0.95rem;
    line-height: 1.6;
}

.footer-bottom {
    padding-top: 32px;
    border-top: 1px solid rgba(255, 255, 255, 0.1);
    text-align: center;
}

.footer-bottom p {
    color: rgba(255, 255, 255, 0.6);
    font-size: 0.9rem;
    margin-bottom: 8px;
}

.affiliate-disclosure {
    font-size: 0.85rem !important;
    max-width: 700px;
    margin: 0 auto;
    line-height: 1.5;
}

/* Mobile Responsive */
@media (max-width: 992px) {
    .footer-grid {
        grid-template-columns: 1fr 1fr;
        gap: 40px;
    }
}

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

    .nav-list.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 h1 {
        font-size: 2rem;
    }

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

    .categories,
    .products,
    .buying-guide,
    .seo-content {
        padding: 60px 0;
    }

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

    .footer-grid {
        grid-template-columns: 1fr;
        gap: 32px;
        text-align: center;
    }

    .footer-brand .logo {
        justify-content: center;
    }
}

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

    .hero h1 {
        font-size: 1.75rem;
    }

    .section-title {
        font-size: 1.5rem;
    }

    .btn {
        padding: 12px 24px;
        font-size: 0.95rem;
    }

    .category-grid {
        grid-template-columns: 1fr 1fr;
        gap: 16px;
    }

    .category-card {
        padding: 24px 16px;
    }

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

/* Accessibility */
@media (prefers-reduced-motion: reduce) {
    *,
    *::before,
    *::after {
        animation-duration: 0.01ms !important;
        animation-iteration-count: 1 !important;
        transition-duration: 0.01ms !important;
    }

    html {
        scroll-behavior: auto;
    }
}

/* Focus states for accessibility */
a:focus,
button:focus {
    outline: 2px solid var(--color-secondary);
    outline-offset: 2px;
}

/* Print styles */
@media print {
    .header,
    .mobile-menu-btn,
    .btn-buy {
        display: none;
    }

    .hero {
        padding-top: 20px;
    }

    .product-card {
        break-inside: avoid;
    }
}