/* CSS Variables */
:root {
    --primary-color: #2563eb;
    --primary-hover: #1d4ed8;
    --secondary-color: #10b981;
    --text-primary: #1f2937;
    --text-secondary: #6b7280;
    --text-light: #9ca3af;
    --bg-primary: #ffffff;
    --bg-secondary: #f9fafb;
    --bg-tertiary: #f3f4f6;
    --border-color: #e5e7eb;
    --shadow-sm: 0 1px 2px rgba(0, 0, 0, 0.05);
    --shadow-md: 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-sm: 6px;
    --radius-md: 8px;
    --radius-lg: 12px;
    --radius-xl: 16px;
    --transition: all 0.2s 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;
    color: var(--text-primary);
    background-color: var(--bg-primary);
    line-height: 1.6;
    -webkit-font-smoothing: antialiased;
}

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

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

ul {
    list-style: none;
}

/* Container */
.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 20px;
}

/* Header */
.header {
    background: var(--bg-primary);
    border-bottom: 1px solid var(--border-color);
    position: sticky;
    top: 0;
    z-index: 100;
    box-shadow: var(--shadow-sm);
}

.header-content {
    display: flex;
    align-items: center;
    justify-content: space-between;
    height: 70px;
}

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

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

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

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

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

.nav-list a {
    font-weight: 500;
    color: var(--text-secondary);
    transition: var(--transition);
    padding: 8px 0;
    position: relative;
}

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

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

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

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

.mobile-menu-btn span {
    display: block;
    width: 25px;
    height: 2px;
    background: var(--text-primary);
    transition: var(--transition);
}

/* Buttons */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: 12px 24px;
    font-weight: 600;
    font-size: 0.95rem;
    border-radius: var(--radius-md);
    transition: var(--transition);
    border: none;
    cursor: pointer;
}

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

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

.btn-buy {
    background: #ff9900;
    color: #111;
    width: 100%;
    font-weight: 700;
}

.btn-buy:hover {
    background: #e88b00;
    transform: translateY(-2px);
    box-shadow: var(--shadow-md);
}

/* Hero Section */
.hero {
    background: linear-gradient(135deg, #1e3a8a 0%, #3b82f6 100%);
    color: white;
    padding: 80px 0;
    text-align: center;
}

.hero h1 {
    font-size: clamp(2rem, 5vw, 3rem);
    font-weight: 800;
    margin-bottom: 16px;
    line-height: 1.2;
}

.hero p {
    font-size: 1.2rem;
    opacity: 0.9;
    margin-bottom: 32px;
    max-width: 600px;
    margin-left: auto;
    margin-right: auto;
}

/* Features Section */
.features {
    padding: 60px 0;
    background: var(--bg-secondary);
}

.features-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 24px;
}

.feature-card {
    text-align: center;
    padding: 32px 20px;
    background: var(--bg-primary);
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-sm);
    transition: var(--transition);
}

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

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

.feature-card h3 {
    font-size: 1.1rem;
    font-weight: 700;
    margin-bottom: 8px;
}

.feature-card p {
    color: var(--text-secondary);
    font-size: 0.9rem;
}

/* Laptops Section */
.laptops-section {
    padding: 80px 0;
}

.section-title {
    text-align: center;
    font-size: 2rem;
    font-weight: 800;
    margin-bottom: 48px;
    color: var(--text-primary);
}

.category {
    margin-bottom: 64px;
}

.category-title {
    font-size: 1.5rem;
    font-weight: 700;
    margin-bottom: 24px;
    padding-bottom: 12px;
    border-bottom: 2px solid var(--border-color);
}

.products-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 24px;
}

/* Product Card */
.product-card {
    background: var(--bg-primary);
    border-radius: var(--radius-xl);
    overflow: hidden;
    box-shadow: var(--shadow-md);
    transition: var(--transition);
    position: relative;
    display: flex;
    flex-direction: column;
}

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

.product-badge {
    position: absolute;
    top: 16px;
    left: 16px;
    background: var(--primary-color);
    color: white;
    padding: 6px 12px;
    border-radius: var(--radius-sm);
    font-size: 0.75rem;
    font-weight: 700;
    text-transform: uppercase;
    z-index: 10;
}

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

.product-image {
    position: relative;
    padding-top: 66.67%;
    overflow: hidden;
    background: var(--bg-tertiary);
}

.product-image img {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: var(--transition);
}

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

.product-content {
    padding: 24px;
    display: flex;
    flex-direction: column;
    flex-grow: 1;
}

.product-title {
    font-size: 1.2rem;
    font-weight: 700;
    margin-bottom: 8px;
    color: var(--text-primary);
}

.product-specs {
    color: var(--text-secondary);
    font-size: 0.85rem;
    margin-bottom: 12px;
    line-height: 1.5;
}

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

.stars {
    color: #f59e0b;
    font-size: 1rem;
    letter-spacing: 2px;
}

.rating-text {
    color: var(--text-secondary);
    font-size: 0.85rem;
    font-weight: 500;
}

.product-description {
    color: var(--text-secondary);
    font-size: 0.9rem;
    margin-bottom: 16px;
    flex-grow: 1;
}

.product-price {
    margin-bottom: 16px;
}

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

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

.guide-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 24px;
}

.guide-card {
    background: var(--bg-primary);
    padding: 32px;
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-sm);
}

.guide-card h3 {
    font-size: 1.1rem;
    margin-bottom: 12px;
}

.guide-card p {
    color: var(--text-secondary);
    font-size: 0.9rem;
}

/* SEO Content Section */
.seo-content {
    padding: 80px 0;
    background: var(--bg-primary);
    border-top: 1px solid var(--border-color);
}

.seo-content h2 {
    text-align: center;
    font-size: 1.75rem;
    font-weight: 800;
    margin-bottom: 32px;
    color: var(--text-primary);
}

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

.seo-text p {
    color: var(--text-secondary);
    margin-bottom: 20px;
    font-size: 1rem;
    line-height: 1.8;
}

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

/* Footer */
.footer {
    background: #111827;
    color: white;
    padding: 60px 0 30px;
}

.footer-content {
    display: flex;
    justify-content: space-between;
    gap: 60px;
    margin-bottom: 40px;
}

.footer-brand {
    max-width: 300px;
}

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

.footer-brand .logo-text {
    color: white;
    font-weight: 700;
    font-size: 1.25rem;
}

.footer-brand .logo-au {
    color: #60a5fa;
}

.footer-brand p {
    color: var(--text-light);
    margin-top: 16px;
    font-size: 0.9rem;
}

.footer-links {
    display: flex;
    gap: 80px;
}

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

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

.footer-column a {
    color: var(--text-light);
    font-size: 0.9rem;
    transition: var(--transition);
}

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

.footer-bottom {
    border-top: 1px solid #374151;
    padding-top: 30px;
    text-align: center;
}

.footer-bottom p {
    color: var(--text-light);
    font-size: 0.85rem;
    margin-bottom: 12px;
}

.affiliate-disclosure {
    font-size: 0.8rem !important;
    max-width: 800px;
    margin: 0 auto;
    line-height: 1.6;
}

/* Responsive Design */
@media (max-width: 1024px) {
    .features-grid,
    .guide-grid {
        grid-template-columns: repeat(2, 1fr);
    }

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

@media (max-width: 768px) {
    .mobile-menu-btn {
        display: flex;
    }

    .nav-list {
        position: absolute;
        top: 70px;
        left: 0;
        right: 0;
        background: var(--bg-primary);
        flex-direction: column;
        padding: 20px;
        gap: 16px;
        border-bottom: 1px solid var(--border-color);
        box-shadow: var(--shadow-md);
        display: none;
    }

    .nav-list.active {
        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: 60px 0;
    }

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

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

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

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

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

    .category-title {
        font-size: 1.25rem;
    }

    .footer-content {
        flex-direction: column;
        gap: 40px;
    }

    .footer-links {
        flex-direction: column;
        gap: 30px;
    }
}

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

    .btn {
        padding: 10px 20px;
        font-size: 0.9rem;
    }

    .product-content {
        padding: 20px;
    }

    .price {
        font-size: 1.25rem;
    }
}

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

/* Focus styles */
a:focus-visible,
button:focus-visible {
    outline: 2px solid var(--primary-color);
    outline-offset: 2px;
}

/* Print styles */
@media print {
    .header,
    .hero,
    .features,
    .footer {
        display: none;
    }

    .product-card {
        break-inside: avoid;
        box-shadow: none;
        border: 1px solid #ccc;
    }
}