/* ===================================
   CSS Variables for Theming
   =================================== */
:root {
    /* Primary Colors */
    --color-primary: #2563eb;
    --color-primary-dark: #1e40af;
    --color-primary-light: #3b82f6;

    /* Secondary Colors */
    --color-secondary: #64748b;
    --color-secondary-dark: #475569;
    --color-secondary-light: #94a3b8;

    /* Neutral Colors */
    --color-white: #ffffff;
    --color-gray-50: #f8fafc;
    --color-gray-100: #f1f5f9;
    --color-gray-200: #e2e8f0;
    --color-gray-300: #cbd5e1;
    --color-gray-400: #94a3b8;
    --color-gray-500: #64748b;
    --color-gray-600: #475569;
    --color-gray-700: #334155;
    --color-gray-800: #1e293b;
    --color-gray-900: #0f172a;

    /* Accent Colors */
    --color-success: #10b981;
    --color-warning: #f59e0b;
    --color-info: #3b82f6;
    --color-gold: #fbbf24;
    --color-silver: #94a3b8;
    --color-bronze: #d97706;

    /* Typography */
    --font-primary: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen, Ubuntu, Cantarell, sans-serif;
    --font-size-base: 16px;
    --line-height-base: 1.6;

    /* Spacing */
    --spacing-xs: 0.5rem;
    --spacing-sm: 1rem;
    --spacing-md: 1.5rem;
    --spacing-lg: 2rem;
    --spacing-xl: 3rem;
    --spacing-2xl: 4rem;

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

    /* Border Radius */
    --radius-sm: 0.375rem;
    --radius-md: 0.5rem;
    --radius-lg: 0.75rem;
    --radius-xl: 1rem;

    /* Transitions */
    --transition-fast: 150ms ease-in-out;
    --transition-base: 250ms ease-in-out;
    --transition-slow: 350ms ease-in-out;
}

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

html {
    font-size: var(--font-size-base);
    scroll-behavior: smooth;
}

body {
    font-family: var(--font-primary);
    line-height: var(--line-height-base);
    color: var(--color-gray-800);
    background-color: var(--color-gray-50);
}

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

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

a:hover {
    color: var(--color-primary-dark);
}

/* ===================================
   Container & Layout
   =================================== */
.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 var(--spacing-md);
}

section {
    padding: var(--spacing-2xl) 0;
}

/* ===================================
   Header Styles
   =================================== */
.header {
    background: linear-gradient(135deg, var(--color-primary) 0%, var(--color-primary-dark) 100%);
    color: var(--color-white);
    padding: var(--spacing-lg) 0;
    box-shadow: var(--shadow-md);
    position: sticky;
    top: 0;
    z-index: 1000;
}

.header-content {
    display: flex;
    justify-content: space-between;
    align-items: center;
    gap: var(--spacing-lg);
}

.logo h1 {
    font-size: 1.75rem;
    font-weight: 700;
    margin-bottom: 0.25rem;
}

.tagline {
    font-size: 0.875rem;
    opacity: 0.9;
    font-weight: 300;
}

.nav ul {
    display: flex;
    list-style: none;
    gap: var(--spacing-lg);
}

.nav a {
    color: var(--color-white);
    font-weight: 500;
    transition: opacity var(--transition-fast);
}

.nav a:hover {
    opacity: 0.8;
}

/* ===================================
   Featured Section
   =================================== */
.featured-section {
    background: linear-gradient(135deg, var(--color-gray-100) 0%, var(--color-white) 100%);
    padding: var(--spacing-xl) 0;
}

.featured-article {
    background: var(--color-white);
    padding: var(--spacing-xl);
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-lg);
    position: relative;
}

.featured-badge {
    display: inline-block;
    background: var(--color-primary);
    color: var(--color-white);
    padding: var(--spacing-xs) var(--spacing-md);
    border-radius: var(--radius-md);
    font-size: 0.875rem;
    font-weight: 600;
    margin-bottom: var(--spacing-md);
}

.featured-article h2 {
    font-size: 2rem;
    color: var(--color-gray-900);
    margin-bottom: var(--spacing-md);
    line-height: 1.3;
}

.featured-excerpt {
    font-size: 1.125rem;
    color: var(--color-gray-600);
    margin: var(--spacing-md) 0;
}

/* ===================================
   Article Meta Styles
   =================================== */
.article-meta {
    display: flex;
    flex-wrap: wrap;
    gap: var(--spacing-md);
    margin: var(--spacing-md) 0;
    font-size: 0.875rem;
    color: var(--color-gray-600);
}

.meta-item {
    display: flex;
    align-items: center;
    gap: 0.25rem;
}

.meta-label {
    font-weight: 600;
}

/* ===================================
   Star Rating Styles
   =================================== */
.stars {
    color: var(--color-gold);
    font-size: 1.25rem;
    letter-spacing: 2px;
}

.stars-small {
    color: var(--color-gold);
    font-size: 0.875rem;
    letter-spacing: 1px;
}

.rating {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
}

.rating-text {
    font-weight: 600;
    color: var(--color-gray-700);
}

/* ===================================
   Button Styles
   =================================== */
.btn {
    display: inline-block;
    padding: 0.75rem 1.5rem;
    border-radius: var(--radius-md);
    font-weight: 600;
    text-align: center;
    cursor: pointer;
    transition: all var(--transition-base);
    border: none;
    font-size: 1rem;
}

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

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

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

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

.btn-small {
    padding: 0.5rem 1rem;
    font-size: 0.875rem;
}

/* ===================================
   Section Titles
   =================================== */
.section-title {
    font-size: 2rem;
    color: var(--color-gray-900);
    margin-bottom: var(--spacing-xl);
    text-align: center;
    font-weight: 700;
}

/* ===================================
   Reviews Grid
   =================================== */
.reviews-section {
    background: var(--color-white);
}

.reviews-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(350px, 1fr));
    gap: var(--spacing-lg);
}

.review-card {
    background: var(--color-white);
    border: 1px solid var(--color-gray-200);
    border-radius: var(--radius-lg);
    padding: var(--spacing-lg);
    box-shadow: var(--shadow-sm);
    transition: all var(--transition-base);
    position: relative;
}

.review-card:hover {
    box-shadow: var(--shadow-lg);
    transform: translateY(-4px);
    border-color: var(--color-primary);
}

.review-card h3 {
    font-size: 1.25rem;
    color: var(--color-gray-900);
    margin-bottom: var(--spacing-sm);
    line-height: 1.4;
}

.card-excerpt {
    color: var(--color-gray-600);
    margin: var(--spacing-md) 0;
    line-height: 1.6;
}

.card-badge {
    position: absolute;
    top: var(--spacing-md);
    right: var(--spacing-md);
    background: var(--color-success);
    color: var(--color-white);
    padding: 0.25rem 0.75rem;
    border-radius: var(--radius-sm);
    font-size: 0.75rem;
    font-weight: 600;
}

/* ===================================
   Categories Grid
   =================================== */
.categories-section {
    background: var(--color-gray-100);
}

.categories-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: var(--spacing-lg);
}

.category-card {
    background: var(--color-white);
    padding: var(--spacing-xl);
    border-radius: var(--radius-lg);
    text-align: center;
    box-shadow: var(--shadow-md);
    transition: all var(--transition-base);
}

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

.category-icon {
    font-size: 3rem;
    margin-bottom: var(--spacing-md);
}

.category-card h3 {
    font-size: 1.25rem;
    color: var(--color-gray-900);
    margin-bottom: var(--spacing-sm);
}

.category-card p {
    color: var(--color-gray-600);
    margin-bottom: var(--spacing-md);
}

.category-link {
    color: var(--color-primary);
    font-weight: 600;
    display: inline-block;
    transition: transform var(--transition-fast);
}

.category-link:hover {
    transform: translateX(4px);
}

/* ===================================
   Top-Rated Section
   =================================== */
.top-rated-section {
    background: var(--color-white);
}

.top-rated-list {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-lg);
    margin-bottom: var(--spacing-2xl);
}

.top-rated-item {
    display: flex;
    gap: var(--spacing-lg);
    background: var(--color-gray-50);
    padding: var(--spacing-lg);
    border-radius: var(--radius-lg);
    border: 2px solid var(--color-gray-200);
    transition: all var(--transition-base);
}

.top-rated-item:hover {
    border-color: var(--color-primary);
    box-shadow: var(--shadow-lg);
}

.rank-badge {
    flex-shrink: 0;
    width: 60px;
    height: 60px;
    background: var(--color-gray-300);
    color: var(--color-white);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.75rem;
    font-weight: 700;
}

.rank-badge.gold {
    background: linear-gradient(135deg, var(--color-gold) 0%, #f59e0b 100%);
}

.rank-badge.silver {
    background: linear-gradient(135deg, var(--color-silver) 0%, #64748b 100%);
}

.rank-badge.bronze {
    background: linear-gradient(135deg, var(--color-bronze) 0%, #b45309 100%);
}

.top-rated-content {
    flex-grow: 1;
}

.top-rated-content h3 {
    font-size: 1.25rem;
    color: var(--color-gray-900);
    margin-bottom: var(--spacing-sm);
}

.top-rated-content p {
    color: var(--color-gray-600);
    margin: var(--spacing-sm) 0;
}

/* ===================================
   Comparison Table
   =================================== */
.comparison-section {
    margin-top: var(--spacing-2xl);
}

.comparison-section h3 {
    font-size: 1.5rem;
    color: var(--color-gray-900);
    margin-bottom: var(--spacing-lg);
}

.table-wrapper {
    overflow-x: auto;
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-md);
}

.comparison-table {
    width: 100%;
    border-collapse: collapse;
    background: var(--color-white);
}

.comparison-table thead {
    background: var(--color-primary);
    color: var(--color-white);
}

.comparison-table th {
    padding: var(--spacing-md);
    text-align: left;
    font-weight: 600;
}

.comparison-table td {
    padding: var(--spacing-md);
    border-bottom: 1px solid var(--color-gray-200);
}

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

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

/* ===================================
   Info Boxes
   =================================== */
.info-boxes-section {
    background: var(--color-gray-100);
}

.info-box {
    background: var(--color-white);
    padding: var(--spacing-lg);
    border-radius: var(--radius-lg);
    margin-bottom: var(--spacing-lg);
    border-left: 4px solid;
    box-shadow: var(--shadow-sm);
}

.info-box h3 {
    font-size: 1.125rem;
    margin-bottom: var(--spacing-sm);
}

.info-box.info {
    border-color: var(--color-info);
    background: #eff6ff;
}

.info-box.info h3 {
    color: var(--color-info);
}

.info-box.success {
    border-color: var(--color-success);
    background: #f0fdf4;
}

.info-box.success h3 {
    color: var(--color-success);
}

.info-box.warning {
    border-color: var(--color-warning);
    background: #fffbeb;
}

.info-box.warning h3 {
    color: var(--color-warning);
}

.info-box p {
    color: var(--color-gray-700);
    line-height: 1.6;
}

/* ===================================
   Footer Styles
   =================================== */
.footer {
    background: var(--color-gray-900);
    color: var(--color-gray-300);
    padding: var(--spacing-2xl) 0 var(--spacing-lg);
}

.footer-content {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: var(--spacing-xl);
    margin-bottom: var(--spacing-xl);
}

.footer-section h4 {
    color: var(--color-white);
    font-size: 1.125rem;
    margin-bottom: var(--spacing-md);
}

.footer-section ul {
    list-style: none;
}

.footer-section li {
    margin-bottom: var(--spacing-xs);
}

.footer-section a {
    color: var(--color-gray-300);
    transition: color var(--transition-fast);
}

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

.footer-bottom {
    border-top: 1px solid var(--color-gray-700);
    padding-top: var(--spacing-md);
    text-align: center;
    font-size: 0.875rem;
}

.footer-bottom a {
    color: var(--color-gray-300);
}

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

/* ===================================
   Responsive Design
   =================================== */

/* Tablet */
@media (max-width: 768px) {
    .header-content {
        flex-direction: column;
        text-align: center;
    }

    .nav ul {
        flex-wrap: wrap;
        justify-content: center;
        gap: var(--spacing-md);
    }

    .featured-article h2 {
        font-size: 1.5rem;
    }

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

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

    .categories-grid {
        grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    }

    .top-rated-item {
        flex-direction: column;
        text-align: center;
    }

    .rank-badge {
        margin: 0 auto;
    }
}

/* Mobile */
@media (max-width: 480px) {
    :root {
        --font-size-base: 14px;
    }

    .container {
        padding: 0 var(--spacing-sm);
    }

    section {
        padding: var(--spacing-xl) 0;
    }

    .logo h1 {
        font-size: 1.5rem;
    }

    .featured-article {
        padding: var(--spacing-lg);
    }

    .featured-article h2 {
        font-size: 1.25rem;
    }

    .featured-excerpt {
        font-size: 1rem;
    }

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

    .review-card {
        padding: var(--spacing-md);
    }

    .category-card {
        padding: var(--spacing-lg);
    }

    .category-icon {
        font-size: 2rem;
    }

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

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

    .comparison-table th,
    .comparison-table td {
        padding: var(--spacing-sm);
    }
}

/* ===================================
   Utility Classes
   =================================== */
.text-center {
    text-align: center;
}

.mt-lg {
    margin-top: var(--spacing-lg);
}

.mb-lg {
    margin-bottom: var(--spacing-lg);
}

.hidden {
    display: none;
}

/* Smooth scrolling for all links */
html {
    scroll-behavior: smooth;
}

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

/* ===================================
   Article Page Styles
   =================================== */
.article-page {
    background: var(--color-white);
}

.article-hero {
    background: linear-gradient(135deg, var(--color-primary) 0%, var(--color-primary-dark) 100%);
    color: var(--color-white);
    padding: var(--spacing-2xl) 0;
}

.article-hero-content {
    max-width: 900px;
    margin: 0 auto;
    text-align: center;
}

.article-badge {
    display: inline-block;
    background: var(--color-white);
    color: var(--color-primary);
    padding: var(--spacing-xs) var(--spacing-md);
    border-radius: var(--radius-md);
    font-size: 0.875rem;
    font-weight: 600;
    margin-bottom: var(--spacing-md);
}

.article-hero h1 {
    font-size: 2.5rem;
    margin-bottom: var(--spacing-md);
    line-height: 1.2;
}

.article-hero .article-meta {
    justify-content: center;
    color: var(--color-white);
}

.article-hero .article-meta .stars {
    color: var(--color-gold);
}

.article-content {
    padding: var(--spacing-2xl) 0;
}

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

.article-intro {
    margin-bottom: var(--spacing-xl);
}

.lead {
    font-size: 1.25rem;
    line-height: 1.7;
    color: var(--color-gray-700);
    margin-bottom: var(--spacing-lg);
}

.article-content h2 {
    font-size: 2rem;
    color: var(--color-gray-900);
    margin-top: var(--spacing-2xl);
    margin-bottom: var(--spacing-lg);
    padding-bottom: var(--spacing-sm);
    border-bottom: 3px solid var(--color-primary);
}

.article-content h3 {
    font-size: 1.5rem;
    color: var(--color-gray-900);
    margin-top: var(--spacing-xl);
    margin-bottom: var(--spacing-md);
}

.article-content h4 {
    font-size: 1.25rem;
    color: var(--color-gray-800);
    margin-top: var(--spacing-lg);
    margin-bottom: var(--spacing-sm);
}

.article-content p {
    margin-bottom: var(--spacing-md);
    line-height: 1.8;
    color: var(--color-gray-700);
}

.feature-list {
    list-style: none;
    margin: var(--spacing-md) 0;
    padding-left: var(--spacing-lg);
}

.feature-list li {
    position: relative;
    margin-bottom: var(--spacing-sm);
    line-height: 1.7;
}

.feature-list li:before {
    content: "✓";
    position: absolute;
    left: -1.5rem;
    color: var(--color-success);
    font-weight: 700;
}

.numbered-list {
    margin: var(--spacing-md) 0;
    padding-left: var(--spacing-xl);
}

.numbered-list li {
    margin-bottom: var(--spacing-sm);
    line-height: 1.7;
}

/* CTA Section */
.cta-section {
    background: var(--color-gray-100);
    padding: var(--spacing-xl);
    border-radius: var(--radius-lg);
    text-align: center;
    margin: var(--spacing-2xl) 0;
    box-shadow: var(--shadow-md);
}

.cta-content h2 {
    font-size: 2rem;
    color: var(--color-gray-900);
    margin: 0 0 var(--spacing-md) 0;
    border-bottom: none;
    padding-bottom: 0;
}

.cta-content p {
    font-size: 1.125rem;
    color: var(--color-gray-600);
    margin-bottom: var(--spacing-lg);
}

.cta-final {
    background: linear-gradient(135deg, var(--color-primary) 0%, var(--color-primary-dark) 100%);
    color: var(--color-white);
}

.cta-final h2 {
    color: var(--color-white);
}

.cta-final p {
    color: var(--color-white);
}

/* Pricing Section */
.pricing-section {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: var(--spacing-lg);
    margin: var(--spacing-xl) 0;
}

.pricing-card {
    background: var(--color-white);
    border: 2px solid var(--color-gray-200);
    border-radius: var(--radius-lg);
    padding: var(--spacing-xl);
    text-align: center;
    transition: all var(--transition-base);
    position: relative;
}

.pricing-card:hover {
    transform: translateY(-4px);
    box-shadow: var(--shadow-xl);
    border-color: var(--color-primary);
}

.pricing-card.featured-pricing {
    border-color: var(--color-primary);
    border-width: 3px;
    box-shadow: var(--shadow-lg);
}

.popular-badge {
    position: absolute;
    top: -15px;
    left: 50%;
    transform: translateX(-50%);
    background: var(--color-primary);
    color: var(--color-white);
    padding: 0.5rem 1.5rem;
    border-radius: var(--radius-md);
    font-size: 0.875rem;
    font-weight: 600;
}

.pricing-card h4 {
    font-size: 1.5rem;
    color: var(--color-gray-900);
    margin-bottom: var(--spacing-md);
    margin-top: 0;
}

.pricing-card .price {
    font-size: 2.5rem;
    font-weight: 700;
    color: var(--color-primary);
    margin: var(--spacing-md) 0;
}

.pricing-card .feature-list {
    text-align: left;
    margin-top: var(--spacing-lg);
}

/* Highlight Box */
.highlight-box {
    background: linear-gradient(135deg, #fef3c7 0%, #fde68a 100%);
    border-left: 4px solid var(--color-warning);
    padding: var(--spacing-lg);
    border-radius: var(--radius-lg);
    margin: var(--spacing-xl) 0;
    box-shadow: var(--shadow-sm);
}

.highlight-box h3 {
    color: #92400e;
    margin-top: 0;
    margin-bottom: var(--spacing-sm);
}

.highlight-box p {
    color: #78350f;
    margin-bottom: 0;
}

/* FAQ Section */
.faq-section {
    margin: var(--spacing-xl) 0;
}

.faq-item {
    background: var(--color-gray-50);
    padding: var(--spacing-lg);
    border-radius: var(--radius-lg);
    margin-bottom: var(--spacing-md);
    border-left: 4px solid var(--color-primary);
}

.faq-item h3 {
    color: var(--color-primary);
    font-size: 1.25rem;
    margin-top: 0;
    margin-bottom: var(--spacing-sm);
}

.faq-item p {
    color: var(--color-gray-700);
    margin-bottom: 0;
    line-height: 1.7;
}

/* Map Section */
.map-section {
    background: var(--color-white);
    padding: var(--spacing-2xl) 0;
}

.map-container {
    position: relative;
    width: 100%;
    max-width: 1000px;
    margin: 0 auto;
    overflow: hidden;
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-lg);
}

.map-container iframe {
    width: 100%;
    height: 450px;
    display: block;
}

/* Article Responsive Design */
@media (max-width: 768px) {
    .article-hero h1 {
        font-size: 1.75rem;
    }

    .article-content h2 {
        font-size: 1.5rem;
    }

    .article-content h3 {
        font-size: 1.25rem;
    }

    .lead {
        font-size: 1.125rem;
    }

    .pricing-section {
        grid-template-columns: 1fr;
    }

    .cta-content h2 {
        font-size: 1.5rem;
    }

    .map-container iframe {
        height: 350px;
    }
}

@media (max-width: 480px) {
    .article-hero h1 {
        font-size: 1.5rem;
    }

    .article-content h2 {
        font-size: 1.25rem;
    }

    .lead {
        font-size: 1rem;
    }

    .pricing-card .price {
        font-size: 2rem;
    }

    .map-container iframe {
        height: 300px;
    }
}