/* ========================================
   The Collector's Archive - Stylesheet
   Premium Collector Hub Design
   ======================================== */

/* CSS Variables */
:root {
    /* Colors - Premium, archival palette */
    --color-primary: #1a1a1a;
    --color-secondary: #4a4a4a;
    --color-accent: #8b7355;
    --color-accent-light: #a68b6a;
    --color-background: #faf9f7;
    --color-surface: #ffffff;
    --color-text: #1a1a1a;
    --color-text-muted: #6b6b6b;
    --color-text-light: #9a9a9a;
    --color-border: #e5e3df;
    --color-border-light: #f0eeeb;
    
    /* Typography */
    --font-heading: 'Crimson Text', Georgia, serif;
    --font-body: 'Inter', -apple-system, BlinkMacSystemFont, sans-serif;
    
    /* Spacing */
    --space-xs: 0.5rem;
    --space-sm: 1rem;
    --space-md: 1.5rem;
    --space-lg: 2.5rem;
    --space-xl: 4rem;
    --space-2xl: 6rem;
    
    /* Layout */
    --max-width: 1200px;
    --border-radius: 4px;
    --border-radius-lg: 8px;
    
    /* Shadows */
    --shadow-sm: 0 1px 2px rgba(0,0,0,0.04);
    --shadow-md: 0 4px 12px rgba(0,0,0,0.06);
    --shadow-lg: 0 8px 24px rgba(0,0,0,0.08);
}

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

/* Skip Link for Accessibility */
.skip-link {
    position: absolute;
    top: -100%;
    left: 50%;
    transform: translateX(-50%);
    background-color: var(--color-primary);
    color: var(--color-surface);
    padding: 0.75rem 1.5rem;
    font-weight: 600;
    font-size: 0.9375rem;
    border-radius: 0 0 var(--border-radius) var(--border-radius);
    z-index: 1000;
    transition: top 0.2s ease;
}

.skip-link:focus {
    top: 0;
    outline: 2px solid var(--color-accent);
    outline-offset: 2px;
}

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

/* Remove default focus outline when using focus-visible */
*:focus {
    outline: none;
}

*:focus-visible {
    outline: 2px solid var(--color-accent);
    outline-offset: 2px;
}

html {
    font-size: 16px;
    scroll-behavior: smooth;
}

body {
    font-family: var(--font-body);
    font-size: 1rem;
    line-height: 1.6;
    color: var(--color-text);
    background-color: var(--color-background);
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

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

a {
    color: var(--color-accent);
    text-decoration: none;
    transition: color 0.2s ease;
}

a:hover {
    color: var(--color-accent-light);
}

/* Container */
.container {
    max-width: var(--max-width);
    margin: 0 auto;
    padding: 0 var(--space-md);
}

/* ========================================
   Navigation
   ======================================== */
.site-nav {
    background-color: var(--color-surface);
    border-bottom: 1px solid var(--color-border);
    position: sticky;
    top: 0;
    z-index: 100;
}

.nav-container {
    max-width: var(--max-width);
    margin: 0 auto;
    padding: 0 var(--space-md);
    display: flex;
    align-items: center;
    justify-content: space-between;
    height: 72px;
}

.logo {
    display: flex;
    align-items: center;
    gap: var(--space-xs);
    color: var(--color-primary);
    font-weight: 600;
    font-size: 1.125rem;
}

.logo-icon {
    font-size: 1.5rem;
    color: var(--color-accent);
}

.logo-text {
    font-family: var(--font-heading);
    font-weight: 600;
}

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

.nav-menu a {
    color: var(--color-secondary);
    font-weight: 500;
    font-size: 0.9375rem;
    padding: var(--space-xs) 0;
    border-bottom: 2px solid transparent;
    transition: all 0.2s ease;
}

.nav-menu a:hover,
.nav-menu a.active {
    color: var(--color-primary);
    border-bottom-color: var(--color-accent);
}

.nav-toggle {
    display: none;
    flex-direction: column;
    gap: 5px;
    background: none;
    border: none;
    cursor: pointer;
    padding: var(--space-xs);
}

.nav-toggle span {
    display: block;
    width: 24px;
    height: 2px;
    background-color: var(--color-primary);
    transition: all 0.3s ease;
}

/* ========================================
   Hero Section
   ======================================== */
.hero {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--space-xl);
    align-items: center;
    max-width: var(--max-width);
    margin: 0 auto;
    padding: var(--space-2xl) var(--space-md);
    min-height: 70vh;
}

.hero-content {
    max-width: 560px;
}

.hero-eyebrow {
    font-size: 0.875rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.1em;
    color: var(--color-accent);
    margin-bottom: var(--space-sm);
}

.hero-title {
    font-family: var(--font-heading);
    font-size: 3.5rem;
    font-weight: 700;
    line-height: 1.1;
    color: var(--color-primary);
    margin-bottom: var(--space-md);
}

.hero-subtitle {
    font-size: 1.25rem;
    color: var(--color-text-muted);
    margin-bottom: var(--space-lg);
    line-height: 1.6;
}

.hero-actions {
    display: flex;
    gap: var(--space-sm);
}

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

.hero-image-placeholder {
    width: 100%;
    max-width: 480px;
    aspect-ratio: 4/3;
    background: linear-gradient(135deg, var(--color-border-light) 0%, var(--color-border) 100%);
    border-radius: var(--border-radius-lg);
    display: flex;
    align-items: center;
    justify-content: center;
    font-family: var(--font-heading);
    font-size: 1.5rem;
    color: var(--color-text-light);
    border: 1px solid var(--color-border);
}

/* ========================================
   Buttons
   ======================================== */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: 0.875rem 1.75rem;
    font-size: 0.9375rem;
    font-weight: 600;
    border-radius: var(--border-radius);
    transition: all 0.2s ease;
    cursor: pointer;
    border: none;
}

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

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

.btn-secondary {
    background-color: transparent;
    color: var(--color-primary);
    border: 1px solid var(--color-border);
}

.btn-secondary:hover {
    background-color: var(--color-background);
    border-color: var(--color-text-light);
}

.btn-large {
    padding: 1rem 2.5rem;
    font-size: 1rem;
}

/* ========================================
   Value Section
   ======================================== */
.value-section {
    padding: var(--space-2xl) 0;
    background-color: var(--color-surface);
    border-top: 1px solid var(--color-border);
    border-bottom: 1px solid var(--color-border);
}

.value-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: var(--space-lg);
}

.value-item {
    text-align: center;
    padding: var(--space-md);
}

.value-icon {
    font-size: 2.5rem;
    margin-bottom: var(--space-sm);
}

.value-item h3 {
    font-family: var(--font-heading);
    font-size: 1.25rem;
    font-weight: 600;
    margin-bottom: var(--space-xs);
    color: var(--color-primary);
}

.value-item p {
    font-size: 0.9375rem;
    color: var(--color-text-muted);
    line-height: 1.6;
}

/* ========================================
   Topics Section
   ======================================== */
.topics-section {
    padding: var(--space-2xl) 0;
}

.section-header {
    text-align: center;
    margin-bottom: var(--space-xl);
}

.section-header h2 {
    font-family: var(--font-heading);
    font-size: 2.5rem;
    font-weight: 700;
    color: var(--color-primary);
    margin-bottom: var(--space-xs);
}

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

.topics-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: var(--space-md);
}

.topic-card {
    background-color: var(--color-surface);
    border-radius: var(--border-radius-lg);
    overflow: hidden;
    border: 1px solid var(--color-border);
    transition: all 0.3s ease;
    display: block;
}

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

.topic-image {
    aspect-ratio: 16/10;
    background-color: var(--color-border-light);
    display: flex;
    align-items: center;
    justify-content: center;
}

.topic-content {
    padding: var(--space-md);
}

.topic-content h3 {
    font-family: var(--font-heading);
    font-size: 1.25rem;
    font-weight: 600;
    margin-bottom: var(--space-xs);
    color: var(--color-primary);
}

.topic-content p {
    font-size: 0.9375rem;
    color: var(--color-text-muted);
    margin-bottom: var(--space-sm);
    line-height: 1.5;
}

.topic-count {
    font-size: 0.8125rem;
    font-weight: 600;
    color: var(--color-accent);
    text-transform: uppercase;
    letter-spacing: 0.05em;
}

.topic-card-more {
    display: flex;
    align-items: center;
    justify-content: center;
    background: linear-gradient(135deg, var(--color-primary) 0%, var(--color-secondary) 100%);
    color: var(--color-surface);
    min-height: 100%;
}

.topic-card-more .topic-content {
    text-align: center;
}

.topic-card-more h3 {
    color: var(--color-surface);
    font-size: 1.5rem;
}

.topic-card-more p {
    color: rgba(255,255,255,0.8);
}

.topic-card-more .topic-count {
    color: var(--color-accent-light);
}

/* Placeholder images */
.placeholder-camera,
.placeholder-telephone,
.placeholder-typewriter,
.placeholder-clock,
.placeholder-gaming,
.placeholder-pen,
.placeholder-toy,
.placeholder-tool,
.placeholder-featured {
    width: 100%;
    height: 100%;
    background: linear-gradient(135deg, var(--color-border-light) 0%, var(--color-border) 100%);
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--color-text-light);
    font-family: var(--font-heading);
    font-size: 0.875rem;
}

/* ========================================
   Featured Section
   ======================================== */
.featured-section {
    padding: var(--space-2xl) 0;
    background-color: var(--color-surface);
    border-top: 1px solid var(--color-border);
}

.featured-grid {
    display: grid;
    grid-template-columns: 2fr 1fr;
    gap: var(--space-lg);
}

.featured-article {
    background-color: var(--color-background);
    border-radius: var(--border-radius-lg);
    overflow: hidden;
    border: 1px solid var(--color-border);
}

.featured-large {
    display: flex;
    flex-direction: column;
}

.featured-large .article-image {
    aspect-ratio: 16/9;
}

.featured-large .article-content {
    padding: var(--space-lg);
}

.featured-large h3 {
    font-family: var(--font-heading);
    font-size: 1.75rem;
    font-weight: 700;
    margin-bottom: var(--space-sm);
    color: var(--color-primary);
}

.featured-large p {
    font-size: 1rem;
    color: var(--color-text-muted);
    margin-bottom: var(--space-md);
    line-height: 1.6;
}

.featured-sidebar {
    display: flex;
    flex-direction: column;
    gap: var(--space-md);
}

.featured-small {
    padding: var(--space-md);
    flex: 1;
    display: flex;
    flex-direction: column;
    justify-content: center;
}

.featured-small h4 {
    font-family: var(--font-heading);
    font-size: 1.125rem;
    font-weight: 600;
    margin-bottom: var(--space-sm);
    color: var(--color-primary);
}

.article-category {
    display: inline-block;
    font-size: 0.75rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.1em;
    color: var(--color-accent);
    margin-bottom: var(--space-xs);
}

.article-link {
    font-weight: 600;
    font-size: 0.9375rem;
}

/* ========================================
   Authority Section
   ======================================== */
.authority-section {
    padding: var(--space-2xl) 0;
    background-color: var(--color-primary);
    color: var(--color-surface);
}

.authority-content {
    text-align: center;
    max-width: 700px;
    margin: 0 auto;
}

.authority-content h2 {
    font-family: var(--font-heading);
    font-size: 2.5rem;
    font-weight: 700;
    margin-bottom: var(--space-md);
}

.authority-content p {
    font-size: 1.125rem;
    color: rgba(255,255,255,0.8);
    margin-bottom: var(--space-xl);
    line-height: 1.6;
}

.authority-stats {
    display: flex;
    justify-content: center;
    gap: var(--space-xl);
}

.stat {
    text-align: center;
}

.stat-number {
    display: block;
    font-family: var(--font-heading);
    font-size: 3rem;
    font-weight: 700;
    color: var(--color-accent-light);
    line-height: 1;
}

.stat-label {
    font-size: 0.9375rem;
    color: rgba(255,255,255,0.7);
    margin-top: var(--space-xs);
}

/* ========================================
   Browse CTA
   ======================================== */
.browse-cta {
    padding: var(--space-2xl) 0;
    text-align: center;
}

.cta-content {
    max-width: 600px;
    margin: 0 auto;
}

.cta-content h2 {
    font-family: var(--font-heading);
    font-size: 2rem;
    font-weight: 700;
    margin-bottom: var(--space-sm);
    color: var(--color-primary);
}

.cta-content p {
    font-size: 1.125rem;
    color: var(--color-text-muted);
    margin-bottom: var(--space-lg);
}

/* ========================================
   Footer
   ======================================== */
.site-footer {
    background-color: var(--color-surface);
    border-top: 1px solid var(--color-border);
    padding: var(--space-2xl) 0 var(--space-lg);
}

.footer-grid {
    display: grid;
    grid-template-columns: 2fr 1fr 1fr 1fr;
    gap: var(--space-xl);
    margin-bottom: var(--space-xl);
}

.footer-brand .logo {
    margin-bottom: var(--space-sm);
}

.footer-brand p {
    font-size: 0.9375rem;
    color: var(--color-text-muted);
    max-width: 280px;
}

.footer-nav h4 {
    font-size: 0.875rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    margin-bottom: var(--space-sm);
    color: var(--color-primary);
}

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

.footer-nav li {
    margin-bottom: var(--space-xs);
}

.footer-nav a {
    font-size: 0.9375rem;
    color: var(--color-text-muted);
}

.footer-nav a:hover {
    color: var(--color-accent);
}

.footer-bottom {
    padding-top: var(--space-lg);
    border-top: 1px solid var(--color-border);
    text-align: center;
}

.footer-bottom p {
    font-size: 0.875rem;
    color: var(--color-text-light);
}

/* ========================================
   Articles Page Styles
   ======================================== */

/* Breadcrumb */
.breadcrumb {
    background-color: var(--color-surface);
    border-bottom: 1px solid var(--color-border);
    padding: var(--space-sm) 0;
}

.breadcrumb .container {
    display: flex;
    align-items: center;
    gap: var(--space-xs);
    font-size: 0.875rem;
}

.breadcrumb a {
    color: var(--color-text-muted);
}

.breadcrumb a:hover {
    color: var(--color-accent);
}

.breadcrumb-separator {
    color: var(--color-text-light);
}

.breadcrumb-current {
    color: var(--color-primary);
    font-weight: 500;
}

/* Page Header */
.page-header {
    background-color: var(--color-surface);
    padding: var(--space-xl) 0;
    text-align: center;
    border-bottom: 1px solid var(--color-border);
}

.page-header h1 {
    font-family: var(--font-heading);
    font-size: 2.5rem;
    font-weight: 700;
    color: var(--color-primary);
    margin-bottom: var(--space-sm);
}

.page-subtitle {
    font-size: 1.125rem;
    color: var(--color-text-muted);
    max-width: 600px;
    margin: 0 auto;
}

/* Filters Section */
.filters-section {
    background-color: var(--color-background);
    padding: var(--space-md) 0;
    border-bottom: 1px solid var(--color-border);
    position: sticky;
    top: 72px;
    z-index: 50;
}

.filters-bar {
    display: flex;
    align-items: center;
    gap: var(--space-md);
    flex-wrap: wrap;
}

.search-box {
    flex: 1;
    min-width: 280px;
    position: relative;
}

.search-input {
    width: 100%;
    padding: 0.75rem 2.5rem 0.75rem 1rem;
    font-size: 0.9375rem;
    border: 1px solid var(--color-border);
    border-radius: var(--border-radius);
    background-color: var(--color-surface);
    transition: border-color 0.2s ease;
}

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

.search-btn {
    position: absolute;
    right: 0.75rem;
    top: 50%;
    transform: translateY(-50%);
    background: none;
    border: none;
    cursor: pointer;
    color: var(--color-text-light);
    display: flex;
    align-items: center;
    justify-content: center;
}

.filter-group {
    display: flex;
    gap: var(--space-sm);
}

.filter-select {
    padding: 0.75rem 2rem 0.75rem 1rem;
    font-size: 0.9375rem;
    border: 1px solid var(--color-border);
    border-radius: var(--border-radius);
    background-color: var(--color-surface);
    cursor: pointer;
    appearance: none;
    background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='12' viewBox='0 0 12 12'%3E%3Cpath fill='%236b6b6b' d='M6 8L1 3h10z'/%3E%3C/svg%3E");
    background-repeat: no-repeat;
    background-position: right 0.75rem center;
}

.view-toggle {
    display: flex;
    gap: var(--space-xs);
    margin-left: auto;
}

.view-btn {
    padding: 0.5rem;
    background: var(--color-surface);
    border: 1px solid var(--color-border);
    border-radius: var(--border-radius);
    cursor: pointer;
    color: var(--color-text-muted);
    transition: all 0.2s ease;
}

.view-btn.active,
.view-btn:hover {
    background-color: var(--color-primary);
    border-color: var(--color-primary);
    color: var(--color-surface);
}

.active-filters {
    display: flex;
    gap: var(--space-xs);
    margin-top: var(--space-sm);
    flex-wrap: wrap;
}

/* Articles Section */
.articles-section {
    padding: var(--space-xl) 0;
}

.articles-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: var(--space-md);
}

.articles-grid.list-view {
    grid-template-columns: 1fr;
}

.article-card {
    background-color: var(--color-surface);
    border-radius: var(--border-radius-lg);
    overflow: hidden;
    border: 1px solid var(--color-border);
    transition: all 0.3s ease;
}

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

.article-image {
    position: relative;
    aspect-ratio: 16/10;
    overflow: hidden;
}

.placeholder-img {
    width: 100%;
    height: 100%;
    background: linear-gradient(135deg, var(--color-border-light) 0%, var(--color-border) 100%);
}

.article-category {
    position: absolute;
    top: var(--space-sm);
    left: var(--space-sm);
    background-color: var(--color-surface);
    padding: 0.25rem 0.75rem;
    border-radius: var(--border-radius);
    font-size: 0.6875rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    color: var(--color-accent);
}

.article-content {
    padding: var(--space-md);
}

.article-card h3 {
    font-family: var(--font-heading);
    font-size: 1.125rem;
    font-weight: 600;
    margin-bottom: var(--space-xs);
    color: var(--color-primary);
    line-height: 1.3;
}

.article-card p {
    font-size: 0.9375rem;
    color: var(--color-text-muted);
    margin-bottom: var(--space-sm);
    line-height: 1.5;
    display: -webkit-box;
    -webkit-line-clamp: 3;
    -webkit-box-orient: vertical;
    overflow: hidden;
}

.article-meta {
    display: flex;
    gap: var(--space-sm);
    margin-bottom: var(--space-sm);
    font-size: 0.8125rem;
    color: var(--color-text-light);
}

/* Pagination */
.pagination {
    display: flex;
    justify-content: center;
    align-items: center;
    gap: var(--space-sm);
    margin-top: var(--space-xl);
    padding-top: var(--space-xl);
    border-top: 1px solid var(--color-border);
}

.pagination-btn {
    padding: 0.625rem 1.25rem;
    font-size: 0.9375rem;
    font-weight: 500;
    border: 1px solid var(--color-border);
    border-radius: var(--border-radius);
    background-color: var(--color-surface);
    cursor: pointer;
    transition: all 0.2s ease;
}

.pagination-btn:hover:not(:disabled) {
    background-color: var(--color-primary);
    border-color: var(--color-primary);
    color: var(--color-surface);
}

.pagination-btn:disabled {
    opacity: 0.5;
    cursor: not-allowed;
}

.pagination-numbers {
    display: flex;
    gap: var(--space-xs);
}

.pagination-number {
    width: 40px;
    height: 40px;
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: var(--border-radius);
    font-size: 0.9375rem;
    font-weight: 500;
    cursor: pointer;
    transition: all 0.2s ease;
}

.pagination-number:hover {
    background-color: var(--color-border-light);
}

.pagination-number.active {
    background-color: var(--color-primary);
    color: var(--color-surface);
}

.pagination-dots {
    display: flex;
    align-items: center;
    color: var(--color-text-light);
}

/* Topics Quick Nav */
.topics-quick-nav {
    background-color: var(--color-surface);
    padding: var(--space-xl) 0;
    border-top: 1px solid var(--color-border);
}

.topics-quick-nav h3 {
    font-family: var(--font-heading);
    font-size: 1.25rem;
    font-weight: 600;
    margin-bottom: var(--space-md);
    color: var(--color-primary);
    text-align: center;
}

.topic-tags {
    display: flex;
    flex-wrap: wrap;
    justify-content: center;
    gap: var(--space-sm);
}

.topic-tag {
    padding: 0.625rem 1.25rem;
    background-color: var(--color-background);
    border: 1px solid var(--color-border);
    border-radius: 100px;
    font-size: 0.9375rem;
    font-weight: 500;
    color: var(--color-secondary);
    transition: all 0.2s ease;
}

.topic-tag:hover {
    background-color: var(--color-primary);
    border-color: var(--color-primary);
    color: var(--color-surface);
}

/* ========================================
   Responsive Design
   ======================================== */
@media (max-width: 1024px) {
    .hero {
        grid-template-columns: 1fr;
        text-align: center;
        gap: var(--space-lg);
    }
    
    .hero-content {
        max-width: 100%;
        order: 1;
    }
    
    .hero-actions {
        justify-content: center;
    }
    
    .hero-visual {
        order: 0;
    }
    
    .hero-image-placeholder {
        max-width: 400px;
    }
    
    .value-grid {
        grid-template-columns: repeat(2, 1fr);
    }
    
    .topics-grid {
        grid-template-columns: repeat(2, 1fr);
    }
    
    .featured-grid {
        grid-template-columns: 1fr;
    }
    
    .articles-grid {
        grid-template-columns: repeat(2, 1fr);
    }
    
    .footer-grid {
        grid-template-columns: repeat(2, 1fr);
    }
}

@media (max-width: 768px) {
    .hero {
        min-height: auto;
        padding: var(--space-xl) var(--space-md);
    }
    
    .nav-menu {
        display: none;
        position: absolute;
        top: 72px;
        left: 0;
        right: 0;
        background-color: var(--color-surface);
        flex-direction: column;
        padding: var(--space-md);
        border-bottom: 1px solid var(--color-border);
        gap: var(--space-sm);
    }
    
    .nav-menu.active {
        display: flex;
    }
    
    .nav-toggle {
        display: flex;
    }
    
    .hero-title {
        font-size: 2.5rem;
    }
    
    .hero-subtitle {
        font-size: 1.125rem;
    }
    
    .hero-actions {
        flex-direction: column;
    }
    
    .value-grid {
        grid-template-columns: 1fr;
    }
    
    .topics-grid {
        grid-template-columns: 1fr;
    }
    
    .authority-stats {
        flex-direction: column;
        gap: var(--space-lg);
    }
    
    .articles-grid {
        grid-template-columns: 1fr;
    }
    
    .filters-bar {
        flex-direction: column;
        align-items: stretch;
    }
    
    .search-box {
        min-width: 100%;
    }
    
    .filter-group {
        flex-direction: column;
    }
    
    .view-toggle {
        margin-left: 0;
    }
    
    .footer-grid {
        grid-template-columns: 1fr;
        gap: var(--space-lg);
    }
    
    .pagination {
        flex-wrap: wrap;
    }
}

@media (max-width: 480px) {
    .hero-title {
        font-size: 2rem;
    }
    
    .section-header h2 {
        font-size: 1.75rem;
    }
    
    .authority-content h2 {
        font-size: 1.75rem;
    }
    
    .stat-number {
        font-size: 2rem;
    }
}