/**
 * BioAge Insider - Main Stylesheet
 *
 * Modern editorial design inspired by The Verge
 * Dark theme by default, bold typography, vibrant accents
 */

/* ========================================
   CSS Variables
   ======================================== */

:root {
    /* Colors - Dark Theme (Default) */
    --color-primary: #6366f1;
    --color-secondary: #8b5cf6;
    --color-accent: #06b6d4;

    /* Backgrounds */
    --bg-primary: #0a0a0b;
    --bg-secondary: #141416;
    --bg-tertiary: #1c1c1f;
    --bg-card: #18181b;

    /* Text */
    --text-primary: #fafafa;
    --text-secondary: #a1a1aa;
    --text-muted: #71717a;

    /* Borders */
    --border: #27272a;
    --border-light: #3f3f46;

    /* Category Colors */
    --cat-gene-editing: #ef4444;
    --cat-epigenetic: #a855f7;
    --cat-senolytics: #ec4899;
    --cat-mitochondria: #f97316;
    --cat-regenerative: #10b981;
    --cat-drug-delivery: #06b6d4;
    --cat-ai-computational: #6366f1;
    --cat-clinical: #f59e0b;
    --cat-biotech-business: #3b82f6;
    --cat-longevity-lifestyle: #14b8a6;
    --cat-other: #71717a;

    /* Spacing */
    --space-xs: 0.25rem;
    --space-sm: 0.5rem;
    --space-md: 1rem;
    --space-lg: 1.5rem;
    --space-xl: 2rem;
    --space-2xl: 3rem;
    --space-3xl: 4rem;

    /* Typography */
    --font-sans: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
    --font-display: 'Space Grotesk', var(--font-sans);

    /* Transitions */
    --transition-fast: 150ms ease;
    --transition-base: 200ms ease;

    /* Layout */
    --container-max: 1280px;
    --header-height: 64px;

    /* Border Radius */
    --radius-sm: 4px;
    --radius-md: 8px;
    --radius-lg: 12px;
}

/* Light Theme */
[data-theme="light"] {
    --bg-primary: #ffffff;
    --bg-secondary: #f4f4f5;
    --bg-tertiary: #e4e4e7;
    --bg-card: #ffffff;
    --text-primary: #18181b;
    --text-secondary: #52525b;
    --text-muted: #71717a;
    --border: #e4e4e7;
    --border-light: #d4d4d8;
}

/* ========================================
   Reset & Base
   ======================================== */

*, *::before, *::after {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
}

html {
    font-size: 16px;
    -webkit-text-size-adjust: 100%;
    scroll-behavior: smooth;
}

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

/* ========================================
   Typography
   ======================================== */

h1, h2, h3, h4, h5, h6 {
    font-family: var(--font-display);
    font-weight: 700;
    line-height: 1.2;
    color: var(--text-primary);
}

h1 { font-size: clamp(2rem, 5vw, 3.5rem); }
h2 { font-size: clamp(1.5rem, 3vw, 2rem); }
h3 { font-size: clamp(1.25rem, 2vw, 1.5rem); }

p {
    margin-bottom: 1rem;
    color: var(--text-secondary);
}

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

a:hover {
    color: var(--color-secondary);
}

/* ========================================
   Layout
   ======================================== */

.container {
    width: 100%;
    max-width: var(--container-max);
    margin: 0 auto;
    padding: 0 var(--space-lg);
}

.section {
    padding: var(--space-3xl) 0;
}

.section + .section {
    border-top: 1px solid var(--border);
}

/* ========================================
   Skip Link
   ======================================== */

.skip-link {
    position: absolute;
    top: -100%;
    left: 0;
    padding: var(--space-md) var(--space-lg);
    background: var(--color-primary);
    color: white;
    z-index: 10000;
    transition: top var(--transition-fast);
}

.skip-link:focus {
    top: 0;
}

/* ========================================
   Header
   ======================================== */

.site-header {
    position: sticky;
    top: 0;
    z-index: 1000;
    background: var(--bg-primary);
    border-bottom: 1px solid var(--border);
    height: var(--header-height);
}

.header-container {
    display: flex;
    align-items: center;
    justify-content: space-between;
    height: 100%;
    max-width: var(--container-max);
    margin: 0 auto;
    padding: 0 var(--space-lg);
}

.site-logo {
    font-family: var(--font-display);
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--text-primary);
    text-decoration: none;
}

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

/* Main Navigation */
.main-nav {
    display: none;
}

@media (min-width: 768px) {
    .main-nav {
        display: block;
    }
}

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

.nav-link {
    display: flex;
    align-items: center;
    gap: var(--space-xs);
    padding: var(--space-sm) 0;
    font-size: 0.9375rem;
    font-weight: 500;
    color: var(--text-secondary);
    background: none;
    border: none;
    cursor: pointer;
    transition: color var(--transition-fast);
}

.nav-link:hover,
.nav-link.active {
    color: var(--text-primary);
}

.dropdown-trigger {
    font-family: inherit;
}

.dropdown-icon {
    transition: transform var(--transition-fast);
}

.has-dropdown:hover .dropdown-icon {
    transform: rotate(180deg);
}

/* Dropdown Menu */
.dropdown-menu {
    position: absolute;
    top: 100%;
    left: 50%;
    transform: translateX(-50%);
    min-width: 220px;
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: var(--radius-md);
    box-shadow: 0 10px 40px rgba(0, 0, 0, 0.3);
    opacity: 0;
    visibility: hidden;
    transition: opacity var(--transition-fast), visibility var(--transition-fast);
    padding: var(--space-sm) 0;
    list-style: none;
}

.has-dropdown {
    position: relative;
}

.has-dropdown:hover .dropdown-menu {
    opacity: 1;
    visibility: visible;
}

.dropdown-link {
    display: flex;
    align-items: center;
    gap: var(--space-sm);
    padding: var(--space-sm) var(--space-md);
    color: var(--text-secondary);
    font-size: 0.875rem;
    transition: background var(--transition-fast), color var(--transition-fast);
}

.dropdown-link:hover {
    background: var(--bg-tertiary);
    color: var(--text-primary);
}

.category-dot {
    width: 8px;
    height: 8px;
    border-radius: 50%;
    flex-shrink: 0;
}

/* Header Actions */
.header-actions {
    display: flex;
    align-items: center;
    gap: var(--space-sm);
}

.header-btn {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 40px;
    height: 40px;
    background: transparent;
    border: none;
    border-radius: var(--radius-md);
    color: var(--text-secondary);
    cursor: pointer;
    transition: background var(--transition-fast), color var(--transition-fast);
}

.header-btn:hover {
    background: var(--bg-tertiary);
    color: var(--text-primary);
}

.header-btn-primary {
    display: none;
    padding: var(--space-sm) var(--space-md);
    background: var(--color-primary);
    color: white;
    font-size: 0.875rem;
    font-weight: 600;
    border-radius: var(--radius-md);
    transition: background var(--transition-fast);
}

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

@media (min-width: 768px) {
    .header-btn-primary {
        display: block;
    }

    .mobile-menu-btn {
        display: none;
    }
}

/* Theme Toggle Icons */
.theme-toggle .icon-moon {
    display: none;
}

[data-theme="light"] .theme-toggle .icon-sun {
    display: none;
}

[data-theme="light"] .theme-toggle .icon-moon {
    display: block;
}

/* ========================================
   Hero Section
   ======================================== */

.hero-section {
    padding: var(--space-xl) 0 var(--space-3xl);
}

.hero-grid {
    display: grid;
    gap: var(--space-lg);
}

@media (min-width: 1024px) {
    .hero-grid {
        grid-template-columns: 2fr 1fr;
    }
}

/* Featured Article Main */
.featured-article-main {
    position: relative;
}

.featured-link {
    display: block;
    position: relative;
    border-radius: var(--radius-md);
    overflow: hidden;
}

.featured-image {
    aspect-ratio: 16/9;
    overflow: hidden;
}

.featured-image img {
    width: 100%;
    height: 100%;
    object-fit: cover;
}

.featured-content {
    padding: var(--space-lg) 0;
}

@media (min-width: 768px) {
    .featured-link {
        height: 100%;
        min-height: 500px;
    }

    .featured-image {
        position: absolute;
        inset: 0;
        aspect-ratio: auto;
    }

    .featured-image::after {
        content: '';
        position: absolute;
        inset: 0;
        background: linear-gradient(to top, rgba(0, 0, 0, 0.9) 0%, transparent 60%);
    }

    .featured-content {
        position: absolute;
        bottom: 0;
        left: 0;
        right: 0;
        padding: var(--space-xl);
    }
}

.featured-category {
    display: inline-block;
    padding: var(--space-xs) var(--space-sm);
    font-size: 0.75rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    color: white;
    border-radius: var(--radius-sm);
    margin-bottom: var(--space-md);
}

.featured-title {
    font-size: clamp(1.75rem, 4vw, 2.5rem);
    font-weight: 700;
    color: var(--text-primary);
    margin-bottom: var(--space-md);
    line-height: 1.2;
}

@media (min-width: 768px) {
    .featured-title {
        color: white;
    }
}

.featured-excerpt {
    font-size: 1.0625rem;
    color: var(--text-secondary);
    margin-bottom: var(--space-md);
    line-height: 1.6;
}

@media (min-width: 768px) {
    .featured-excerpt {
        color: rgba(255, 255, 255, 0.8);
    }
}

.featured-meta {
    display: flex;
    align-items: center;
    gap: var(--space-sm);
    font-size: 0.875rem;
    color: var(--text-muted);
}

@media (min-width: 768px) {
    .featured-meta {
        color: rgba(255, 255, 255, 0.6);
    }
}

.meta-separator {
    width: 4px;
    height: 4px;
    border-radius: 50%;
    background: currentColor;
    opacity: 0.5;
}

/* Featured Secondary */
.featured-secondary {
    display: flex;
    flex-direction: column;
    gap: var(--space-md);
}

.featured-article-small {
    background: var(--bg-card);
    border-radius: var(--radius-md);
    overflow: hidden;
    border: 1px solid var(--border);
}

.featured-small-link {
    display: grid;
    grid-template-columns: 120px 1fr;
    gap: var(--space-md);
    padding: var(--space-md);
}

@media (min-width: 1024px) {
    .featured-small-link {
        grid-template-columns: 140px 1fr;
    }
}

.featured-small-image {
    aspect-ratio: 4/3;
    border-radius: var(--radius-sm);
    overflow: hidden;
}

.featured-small-image img {
    width: 100%;
    height: 100%;
    object-fit: cover;
}

.featured-small-content {
    display: flex;
    flex-direction: column;
    justify-content: center;
}

.featured-small-category {
    font-size: 0.6875rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    margin-bottom: var(--space-xs);
}

.featured-small-title {
    font-size: 1rem;
    font-weight: 600;
    color: var(--text-primary);
    line-height: 1.4;
    margin-bottom: var(--space-sm);
    display: -webkit-box;
    -webkit-line-clamp: 2;
    -webkit-box-orient: vertical;
    overflow: hidden;
}

.featured-small-link:hover .featured-small-title {
    color: var(--color-primary);
}

.featured-small-date {
    font-size: 0.75rem;
    color: var(--text-muted);
}

/* ========================================
   Section Headers
   ======================================== */

.section-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    margin-bottom: var(--space-xl);
}

.section-title {
    display: flex;
    align-items: center;
    gap: var(--space-sm);
    font-size: 1.25rem;
    font-weight: 700;
    color: var(--text-primary);
}

.section-title-accent {
    width: 4px;
    height: 24px;
    background: var(--color-primary);
    border-radius: 2px;
}

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

.section-link:hover {
    color: var(--color-primary);
}

/* ========================================
   Article Cards Grid
   ======================================== */

.articles-grid {
    display: grid;
    gap: var(--space-lg);
}

.articles-grid-3 {
    grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
}

@media (min-width: 768px) {
    .articles-grid-3 {
        grid-template-columns: repeat(3, 1fr);
    }
}

.articles-grid-4 {
    grid-template-columns: repeat(auto-fill, minmax(260px, 1fr));
}

@media (min-width: 1024px) {
    .articles-grid-4 {
        grid-template-columns: repeat(4, 1fr);
    }
}

/* Article Card */
.article-card {
    background: var(--bg-card);
    border-radius: var(--radius-md);
    overflow: hidden;
    border: 1px solid var(--border);
    transition: border-color var(--transition-fast);
}

.article-card:hover {
    border-color: var(--border-light);
}

.article-card-link {
    display: block;
}

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

.article-card-image img {
    width: 100%;
    height: 100%;
    object-fit: cover;
}

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

.article-card-category {
    display: block;
    font-size: 0.6875rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    margin-bottom: var(--space-sm);
}

.article-card-title {
    font-size: 1rem;
    font-weight: 600;
    color: var(--text-primary);
    line-height: 1.4;
    margin-bottom: var(--space-sm);
    display: -webkit-box;
    -webkit-line-clamp: 2;
    -webkit-box-orient: vertical;
    overflow: hidden;
}

.article-card-link:hover .article-card-title {
    color: var(--color-primary);
}

.article-card-excerpt {
    font-size: 0.875rem;
    color: var(--text-secondary);
    line-height: 1.5;
    margin-bottom: var(--space-sm);
    display: -webkit-box;
    -webkit-line-clamp: 2;
    -webkit-box-orient: vertical;
    overflow: hidden;
}

.article-card-meta {
    display: flex;
    align-items: center;
    gap: var(--space-sm);
    font-size: 0.75rem;
    color: var(--text-muted);
}

.meta-dot {
    width: 3px;
    height: 3px;
    border-radius: 50%;
    background: currentColor;
}

/* ========================================
   Tags Cloud
   ======================================== */

.tags-cloud {
    display: flex;
    flex-wrap: wrap;
    gap: var(--space-sm);
}

.tag-link {
    display: inline-flex;
    align-items: center;
    gap: var(--space-xs);
    padding: var(--space-sm) var(--space-md);
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: 9999px;
    font-size: 0.875rem;
    color: var(--text-secondary);
    transition: background var(--transition-fast), border-color var(--transition-fast), color var(--transition-fast);
}

.tag-link:hover {
    background: var(--bg-tertiary);
    border-color: var(--color-primary);
    color: var(--color-primary);
}

.tag-count {
    font-size: 0.75rem;
    color: var(--text-muted);
}

/* ========================================
   Newsletter Section
   ======================================== */

.newsletter-section {
    background: var(--bg-secondary);
    padding: var(--space-3xl) 0;
}

.newsletter-content {
    max-width: 600px;
    margin: 0 auto;
    text-align: center;
}

.newsletter-title {
    font-size: clamp(1.5rem, 4vw, 2rem);
    font-weight: 700;
    margin-bottom: var(--space-md);
}

.newsletter-description {
    color: var(--text-secondary);
    margin-bottom: var(--space-xl);
}

.newsletter-form {
    width: 100%;
}

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

.newsletter-input {
    flex: 1;
    padding: var(--space-md) var(--space-lg);
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: var(--radius-md);
    color: var(--text-primary);
    font-size: 1rem;
}

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

.newsletter-submit {
    padding: var(--space-md) var(--space-xl);
    background: var(--color-primary);
    color: white;
    font-size: 1rem;
    font-weight: 600;
    border: none;
    border-radius: var(--radius-md);
    cursor: pointer;
    transition: background var(--transition-fast);
}

.newsletter-submit:hover {
    background: var(--color-secondary);
}

.newsletter-message {
    margin-top: var(--space-md);
    font-size: 0.875rem;
}

/* ========================================
   Footer
   ======================================== */

.site-footer {
    background: var(--bg-secondary);
    border-top: 1px solid var(--border);
    padding: var(--space-3xl) 0 var(--space-xl);
}

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

@media (min-width: 768px) {
    .footer-grid {
        grid-template-columns: 2fr 1fr 1fr 1fr;
    }
}

.footer-logo {
    font-family: var(--font-display);
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--text-primary);
    display: block;
    margin-bottom: var(--space-sm);
}

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

.footer-tagline {
    color: var(--text-secondary);
    font-size: 0.875rem;
    margin-bottom: var(--space-lg);
}

.footer-social {
    display: flex;
    gap: var(--space-sm);
}

.social-link {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 40px;
    height: 40px;
    background: var(--bg-tertiary);
    border-radius: var(--radius-md);
    color: var(--text-secondary);
    transition: background var(--transition-fast), color var(--transition-fast);
}

.social-link:hover {
    background: var(--color-primary);
    color: white;
}

.footer-nav-title {
    font-size: 0.875rem;
    font-weight: 600;
    color: var(--text-primary);
    margin-bottom: var(--space-md);
}

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

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

.footer-nav-list a {
    color: var(--text-secondary);
    font-size: 0.875rem;
}

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

.footer-bottom {
    padding-top: var(--space-xl);
    border-top: 1px solid var(--border);
}

.footer-copyright {
    text-align: center;
    color: var(--text-muted);
    font-size: 0.875rem;
}

/* ========================================
   Search Modal
   ======================================== */

.search-modal {
    position: fixed;
    inset: 0;
    z-index: 2000;
    background: rgba(0, 0, 0, 0.8);
    display: flex;
    align-items: flex-start;
    justify-content: center;
    padding-top: 20vh;
    opacity: 0;
    visibility: hidden;
    transition: opacity var(--transition-base), visibility var(--transition-base);
}

.search-modal[aria-hidden="false"] {
    opacity: 1;
    visibility: visible;
}

.search-modal-content {
    width: 100%;
    max-width: 600px;
    padding: 0 var(--space-lg);
    position: relative;
}

.search-form {
    display: flex;
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: var(--radius-lg);
    overflow: hidden;
}

.search-input {
    flex: 1;
    padding: var(--space-lg);
    background: transparent;
    border: none;
    color: var(--text-primary);
    font-size: 1.125rem;
}

.search-input:focus {
    outline: none;
}

.search-submit {
    padding: var(--space-lg);
    background: transparent;
    border: none;
    color: var(--text-secondary);
    cursor: pointer;
    transition: color var(--transition-fast);
}

.search-submit:hover {
    color: var(--text-primary);
}

.search-close {
    position: absolute;
    top: -48px;
    right: var(--space-lg);
    background: transparent;
    border: none;
    color: var(--text-secondary);
    cursor: pointer;
}

/* ========================================
   Mobile Navigation
   ======================================== */

.mobile-nav {
    position: fixed;
    inset: 0;
    z-index: 1500;
    background: rgba(0, 0, 0, 0.8);
    opacity: 0;
    visibility: hidden;
    transition: opacity var(--transition-base), visibility var(--transition-base);
}

.mobile-nav[aria-hidden="false"] {
    opacity: 1;
    visibility: visible;
}

.mobile-nav-content {
    position: absolute;
    right: 0;
    top: 0;
    bottom: 0;
    width: 300px;
    max-width: 100%;
    background: var(--bg-card);
    transform: translateX(100%);
    transition: transform var(--transition-base);
}

.mobile-nav[aria-hidden="false"] .mobile-nav-content {
    transform: translateX(0);
}

.mobile-nav-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: var(--space-lg);
    border-bottom: 1px solid var(--border);
}

.mobile-nav-title {
    font-weight: 600;
    color: var(--text-primary);
}

.mobile-nav-close {
    background: transparent;
    border: none;
    color: var(--text-secondary);
    cursor: pointer;
}

.mobile-nav-list {
    list-style: none;
    padding: var(--space-md);
}

.mobile-nav-link {
    display: flex;
    align-items: center;
    gap: var(--space-sm);
    padding: var(--space-md);
    color: var(--text-secondary);
    font-size: 0.9375rem;
    border-radius: var(--radius-sm);
    transition: background var(--transition-fast), color var(--transition-fast);
}

.mobile-nav-link:hover {
    background: var(--bg-tertiary);
    color: var(--text-primary);
}

.mobile-nav-section {
    padding: var(--space-md);
    font-size: 0.75rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    color: var(--text-muted);
}

.mobile-nav-divider {
    height: 1px;
    background: var(--border);
    margin: var(--space-sm) var(--space-md);
}

/* ========================================
   Buttons
   ======================================== */

.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: var(--space-md) var(--space-xl);
    font-size: 0.9375rem;
    font-weight: 600;
    border-radius: var(--radius-md);
    border: none;
    cursor: pointer;
    transition: background var(--transition-fast), color var(--transition-fast);
}

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

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

.btn-secondary {
    background: var(--bg-tertiary);
    color: var(--text-primary);
}

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

/* ========================================
   Utilities
   ======================================== */

.text-center { text-align: center; }
.text-muted { color: var(--text-muted); }

/* Spinner Animation */
@keyframes spin {
    to { transform: rotate(360deg); }
}

.spinner {
    animation: spin 1s linear infinite;
}

/* ========================================
   Container Narrow
   ======================================== */

.container-narrow {
    max-width: 800px;
}

/* ========================================
   Breadcrumbs
   ======================================== */

.breadcrumbs {
    display: flex;
    align-items: center;
    flex-wrap: wrap;
    gap: var(--space-sm);
    font-size: 0.8125rem;
    color: var(--text-muted);
    margin-bottom: var(--space-lg);
}

.breadcrumbs a {
    color: var(--text-secondary);
}

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

.breadcrumb-sep {
    opacity: 0.5;
}

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

/* ========================================
   Reading Progress Bar
   ======================================== */

.reading-progress {
    position: fixed;
    top: 0;
    left: 0;
    width: 0;
    height: 3px;
    background: linear-gradient(90deg, var(--color-primary), var(--color-secondary));
    z-index: 1001;
    transition: width 50ms linear;
}

/* ========================================
   Article Page
   ======================================== */

.article-page {
    padding-bottom: var(--space-3xl);
}

.article-header {
    padding: var(--space-2xl) 0 var(--space-xl);
}

.article-category-badge {
    display: inline-block;
    padding: var(--space-xs) var(--space-md);
    font-size: 0.6875rem;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    color: white;
    border-radius: var(--radius-sm);
    margin-bottom: var(--space-md);
}

.article-title {
    font-size: clamp(2rem, 5vw, 3rem);
    font-weight: 800;
    line-height: 1.15;
    margin-bottom: var(--space-lg);
    letter-spacing: -0.02em;
}

.article-excerpt {
    font-size: 1.25rem;
    color: var(--text-secondary);
    line-height: 1.6;
    margin-bottom: var(--space-xl);
}

.article-meta {
    display: flex;
    align-items: center;
    gap: var(--space-md);
}

.article-author-avatar {
    width: 48px;
    height: 48px;
    border-radius: 50%;
    overflow: hidden;
    flex-shrink: 0;
}

.article-author-avatar img {
    width: 100%;
    height: 100%;
    object-fit: cover;
}

.article-meta-text {
    display: flex;
    flex-direction: column;
    gap: var(--space-xs);
}

.article-author-name {
    font-weight: 600;
    color: var(--text-primary);
}

.article-author-name:hover {
    color: var(--color-primary);
}

.article-meta-details {
    display: flex;
    align-items: center;
    gap: var(--space-sm);
    font-size: 0.875rem;
    color: var(--text-muted);
}

/* Featured Image */
.article-featured-image {
    margin: 0 auto var(--space-2xl);
    max-width: 1000px;
}

.article-featured-image img {
    width: 100%;
    height: auto;
    border-radius: var(--radius-md);
}

.article-featured-image figcaption {
    margin-top: var(--space-sm);
    font-size: 0.8125rem;
    color: var(--text-muted);
    text-align: center;
}

/* Article Content Wrapper */
.article-content-wrapper {
    display: flex;
    gap: var(--space-xl);
    max-width: 1000px;
    margin: 0 auto;
    padding: 0 var(--space-lg);
}

/* Share Sidebar */
.share-sidebar {
    display: none;
    flex-shrink: 0;
    width: 48px;
}

@media (min-width: 1024px) {
    .share-sidebar {
        display: block;
    }
}

.share-sidebar-inner {
    position: sticky;
    top: calc(var(--header-height) + var(--space-xl));
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: var(--space-sm);
}

.share-label {
    font-size: 0.6875rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    color: var(--text-muted);
    margin-bottom: var(--space-xs);
}

.share-btn {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 40px;
    height: 40px;
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: var(--radius-md);
    color: var(--text-secondary);
    cursor: pointer;
    transition: all var(--transition-fast);
}

.share-btn:hover {
    background: var(--bg-tertiary);
    color: var(--text-primary);
    border-color: var(--border-light);
}

.share-twitter:hover { color: #1DA1F2; border-color: #1DA1F2; }
.share-linkedin:hover { color: #0A66C2; border-color: #0A66C2; }
.share-copy:hover { color: var(--color-primary); border-color: var(--color-primary); }

/* Article Content */
.article-content {
    flex: 1;
    min-width: 0;
}

/* Prose Styling */
.prose {
    font-size: 1.125rem;
    line-height: 1.8;
    color: var(--text-secondary);
}

.prose h2 {
    font-size: 1.75rem;
    margin: var(--space-2xl) 0 var(--space-lg);
    color: var(--text-primary);
}

.prose h3 {
    font-size: 1.375rem;
    margin: var(--space-xl) 0 var(--space-md);
    color: var(--text-primary);
}

.prose h4 {
    font-size: 1.125rem;
    margin: var(--space-lg) 0 var(--space-md);
    color: var(--text-primary);
}

.prose p {
    margin-bottom: var(--space-lg);
    color: var(--text-secondary);
}

.prose a {
    color: var(--color-primary);
    text-decoration: underline;
    text-underline-offset: 2px;
}

.prose a:hover {
    color: var(--color-secondary);
}

.prose ul, .prose ol {
    margin-bottom: var(--space-lg);
    padding-left: var(--space-xl);
}

.prose li {
    margin-bottom: var(--space-sm);
}

.prose blockquote {
    margin: var(--space-xl) 0;
    padding: var(--space-lg);
    padding-left: var(--space-xl);
    background: var(--bg-secondary);
    border-left: 4px solid var(--color-primary);
    border-radius: 0 var(--radius-md) var(--radius-md) 0;
    font-style: italic;
}

.prose blockquote p:last-child {
    margin-bottom: 0;
}

.prose img {
    max-width: 100%;
    height: auto;
    border-radius: var(--radius-md);
    margin: var(--space-xl) 0;
}

.prose pre {
    margin: var(--space-xl) 0;
    padding: var(--space-lg);
    background: var(--bg-secondary);
    border-radius: var(--radius-md);
    overflow-x: auto;
    font-size: 0.875rem;
}

.prose code {
    background: var(--bg-tertiary);
    padding: 0.125rem 0.375rem;
    border-radius: var(--radius-sm);
    font-size: 0.875em;
}

.prose pre code {
    background: transparent;
    padding: 0;
}

.prose table {
    width: 100%;
    margin: var(--space-xl) 0;
    border-collapse: collapse;
}

.prose th, .prose td {
    padding: var(--space-md);
    text-align: left;
    border-bottom: 1px solid var(--border);
}

.prose th {
    font-weight: 600;
    color: var(--text-primary);
    background: var(--bg-secondary);
}

/* Article Source */
.article-source {
    margin-top: var(--space-xl);
    padding: var(--space-md);
    background: var(--bg-secondary);
    border-radius: var(--radius-md);
    font-size: 0.875rem;
    color: var(--text-secondary);
}

.article-source a {
    color: var(--color-primary);
}

/* Article Tags */
.article-tags {
    display: flex;
    flex-wrap: wrap;
    gap: var(--space-sm);
    margin-top: var(--space-2xl);
    padding-top: var(--space-xl);
    border-top: 1px solid var(--border);
}

/* Author Box */
.author-box {
    display: flex;
    gap: var(--space-lg);
    margin-top: var(--space-2xl);
    padding: var(--space-xl);
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: var(--radius-lg);
}

.author-box-photo {
    flex-shrink: 0;
    width: 80px;
    height: 80px;
    border-radius: 50%;
    overflow: hidden;
}

.author-box-photo img {
    width: 100%;
    height: 100%;
    object-fit: cover;
}

.author-box-content {
    flex: 1;
    min-width: 0;
}

.author-box-header {
    display: flex;
    justify-content: space-between;
    align-items: flex-start;
    margin-bottom: var(--space-sm);
}

.author-box-name {
    font-size: 1.125rem;
    font-weight: 700;
    color: var(--text-primary);
}

.author-box-name:hover {
    color: var(--color-primary);
}

.author-box-title {
    font-size: 0.875rem;
    color: var(--text-muted);
    margin-top: var(--space-xs);
}

.author-box-social {
    display: flex;
    gap: var(--space-sm);
}

.author-box-social a {
    color: var(--text-muted);
    transition: color var(--transition-fast);
}

.author-box-social a:hover {
    color: var(--color-primary);
}

.author-box-bio {
    font-size: 0.9375rem;
    color: var(--text-secondary);
    line-height: 1.6;
    margin-bottom: var(--space-md);
}

.author-box-link {
    font-size: 0.875rem;
    font-weight: 500;
    color: var(--color-primary);
}

/* Related Articles Section */
.section-related {
    margin-top: var(--space-3xl);
}

/* ========================================
   Category Page
   ======================================== */

.category-header {
    background: var(--bg-secondary);
    padding: var(--space-2xl) 0;
    border-bottom: 4px solid var(--category-color, var(--color-primary));
}

.category-header-content {
    display: flex;
    flex-direction: column;
    gap: var(--space-sm);
}

.category-icon {
    font-size: 2.5rem;
}

.category-title {
    font-size: clamp(2rem, 5vw, 3rem);
    color: var(--text-primary);
}

.category-description {
    font-size: 1.125rem;
    color: var(--text-secondary);
    max-width: 600px;
}

.category-stats {
    font-size: 0.875rem;
    color: var(--text-muted);
}

/* Category Layout */
.category-layout {
    display: grid;
    gap: var(--space-2xl);
}

@media (min-width: 1024px) {
    .category-layout {
        grid-template-columns: 1fr 300px;
    }
}

.category-main {
    min-width: 0;
}

.category-sidebar {
    display: none;
}

@media (min-width: 1024px) {
    .category-sidebar {
        display: block;
    }
}

/* Featured Card Horizontal */
.featured-card {
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: var(--radius-lg);
    overflow: hidden;
}

.featured-card-horizontal .featured-card-link {
    display: grid;
}

@media (min-width: 768px) {
    .featured-card-horizontal .featured-card-link {
        grid-template-columns: 1fr 1fr;
    }
}

.featured-card-image {
    aspect-ratio: 16/10;
    overflow: hidden;
}

.featured-card-image img {
    width: 100%;
    height: 100%;
    object-fit: cover;
}

.featured-card-content {
    padding: var(--space-xl);
    display: flex;
    flex-direction: column;
    justify-content: center;
}

.featured-badge {
    display: inline-block;
    padding: var(--space-xs) var(--space-sm);
    background: var(--color-primary);
    color: white;
    font-size: 0.6875rem;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    border-radius: var(--radius-sm);
    margin-bottom: var(--space-md);
    width: fit-content;
}

.featured-card-title {
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--text-primary);
    line-height: 1.3;
    margin-bottom: var(--space-md);
}

.featured-card-link:hover .featured-card-title {
    color: var(--color-primary);
}

.featured-card-excerpt {
    font-size: 1rem;
    color: var(--text-secondary);
    line-height: 1.6;
    margin-bottom: var(--space-md);
}

.featured-card-category {
    font-size: 0.75rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    margin-bottom: var(--space-sm);
}

.featured-card-meta {
    display: flex;
    align-items: center;
    flex-wrap: wrap;
    gap: var(--space-sm);
    font-size: 0.875rem;
    color: var(--text-muted);
}

.featured-author-avatar {
    width: 24px;
    height: 24px;
    border-radius: 50%;
    object-fit: cover;
}

/* Sidebar Widgets */
.sidebar-widget {
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: var(--radius-lg);
    padding: var(--space-lg);
    margin-bottom: var(--space-lg);
}

.sidebar-widget-title {
    font-size: 1rem;
    font-weight: 700;
    color: var(--text-primary);
    margin-bottom: var(--space-md);
}

.sidebar-newsletter p {
    font-size: 0.875rem;
    color: var(--text-secondary);
    margin-bottom: var(--space-md);
}

.newsletter-form-mini {
    display: flex;
    flex-direction: column;
    gap: var(--space-sm);
}

.newsletter-form-mini input {
    padding: var(--space-md);
    background: var(--bg-primary);
    border: 1px solid var(--border);
    border-radius: var(--radius-md);
    color: var(--text-primary);
    font-size: 0.875rem;
}

.newsletter-form-mini input:focus {
    outline: none;
    border-color: var(--color-primary);
}

/* Tag Cloud in Sidebar */
.tag-cloud {
    display: flex;
    flex-wrap: wrap;
    gap: var(--space-sm);
}

.tag-cloud-large .tag-link {
    font-size: 1rem;
    padding: var(--space-sm) var(--space-lg);
}

/* Pagination */
.pagination {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: var(--space-sm);
    margin-top: var(--space-2xl);
    flex-wrap: wrap;
}

.pagination-prev,
.pagination-next {
    padding: var(--space-sm) var(--space-md);
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: var(--radius-md);
    font-size: 0.875rem;
    color: var(--text-secondary);
}

.pagination-prev:hover,
.pagination-next:hover {
    background: var(--bg-tertiary);
    color: var(--text-primary);
}

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

.pagination-number {
    display: flex;
    align-items: center;
    justify-content: center;
    min-width: 40px;
    height: 40px;
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: var(--radius-md);
    font-size: 0.875rem;
    color: var(--text-secondary);
}

.pagination-number:hover {
    background: var(--bg-tertiary);
    color: var(--text-primary);
}

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

.pagination-ellipsis {
    color: var(--text-muted);
    padding: 0 var(--space-sm);
}

/* Empty State */
.empty-state {
    text-align: center;
    padding: var(--space-3xl);
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: var(--radius-lg);
}

.empty-state p {
    margin-bottom: var(--space-lg);
}

/* ========================================
   Tag Page
   ======================================== */

.tag-header {
    background: var(--bg-secondary);
    padding: var(--space-2xl) 0;
    text-align: center;
}

.tag-title {
    font-size: clamp(2rem, 5vw, 3rem);
    color: var(--color-primary);
}

.tag-meta {
    font-size: 1rem;
    color: var(--text-muted);
    margin-top: var(--space-sm);
}

/* Related Tags */
.section-related-tags {
    padding: var(--space-lg) 0;
    background: var(--bg-secondary);
    border-bottom: 1px solid var(--border);
}

.related-tags-wrapper {
    display: flex;
    align-items: center;
    flex-wrap: wrap;
    gap: var(--space-md);
}

.related-tags-label {
    font-size: 0.875rem;
    font-weight: 600;
    color: var(--text-muted);
}

.related-tags-list {
    display: flex;
    flex-wrap: wrap;
    gap: var(--space-sm);
}

/* ========================================
   Author Page
   ======================================== */

.author-header {
    background: var(--bg-secondary);
    padding: var(--space-3xl) 0;
}

.author-profile {
    display: flex;
    flex-direction: column;
    gap: var(--space-xl);
    align-items: center;
    text-align: center;
}

@media (min-width: 768px) {
    .author-profile {
        flex-direction: row;
        text-align: left;
        align-items: flex-start;
    }
}

.author-profile-photo {
    flex-shrink: 0;
    width: 160px;
    height: 160px;
    border-radius: 50%;
    overflow: hidden;
    border: 4px solid var(--border);
}

.author-profile-photo img {
    width: 100%;
    height: 100%;
    object-fit: cover;
}

.author-profile-placeholder {
    width: 100%;
    height: 100%;
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--bg-tertiary);
    font-size: 4rem;
    font-weight: 700;
    color: var(--text-muted);
}

.author-profile-info {
    flex: 1;
}

.author-profile-name {
    font-size: clamp(1.75rem, 4vw, 2.5rem);
    color: var(--text-primary);
    margin-bottom: var(--space-xs);
}

.author-profile-title {
    font-size: 1.125rem;
    color: var(--color-primary);
    margin-bottom: var(--space-md);
}

.author-credentials {
    display: flex;
    flex-wrap: wrap;
    gap: var(--space-md);
    font-size: 0.875rem;
    color: var(--text-secondary);
    margin-bottom: var(--space-md);
}

.author-credentials .credential,
.author-credentials .affiliation {
    display: flex;
    align-items: center;
    gap: var(--space-xs);
}

.author-profile-bio {
    font-size: 1rem;
    color: var(--text-secondary);
    line-height: 1.7;
    margin-bottom: var(--space-lg);
    max-width: 600px;
}

.author-social {
    display: flex;
    gap: var(--space-sm);
    margin-bottom: var(--space-lg);
}

@media (min-width: 768px) {
    .author-social {
        justify-content: flex-start;
    }
}

.author-social-link {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 40px;
    height: 40px;
    background: var(--bg-tertiary);
    border-radius: var(--radius-md);
    color: var(--text-secondary);
    transition: all var(--transition-fast);
}

.author-social-link:hover {
    background: var(--color-primary);
    color: white;
}

.author-stats {
    display: flex;
    gap: var(--space-xl);
}

@media (min-width: 768px) {
    .author-stats {
        justify-content: flex-start;
    }
}

.author-stat {
    display: flex;
    flex-direction: column;
    align-items: center;
}

@media (min-width: 768px) {
    .author-stat {
        align-items: flex-start;
    }
}

.author-stat-value {
    font-size: 2rem;
    font-weight: 700;
    color: var(--text-primary);
}

.author-stat-label {
    font-size: 0.75rem;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    color: var(--text-muted);
}

/* Expertise Section */
.expertise-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(250px, 1fr));
    gap: var(--space-md);
}

.expertise-item {
    display: flex;
    align-items: center;
    gap: var(--space-sm);
    padding: var(--space-md);
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: var(--radius-md);
    font-size: 0.9375rem;
    color: var(--text-secondary);
}

.expertise-icon {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 24px;
    height: 24px;
    background: rgba(99, 102, 241, 0.2);
    border-radius: 50%;
    color: var(--color-primary);
    flex-shrink: 0;
}

/* Author Full Bio */
.author-full-bio {
    max-width: none;
}

/* Author Category Chips */
.author-categories {
    display: flex;
    flex-wrap: wrap;
    gap: var(--space-sm);
}

.author-category-chip {
    display: inline-flex;
    align-items: center;
    gap: var(--space-sm);
    padding: var(--space-sm) var(--space-md);
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: 9999px;
    font-size: 0.8125rem;
    color: var(--text-secondary);
    transition: all var(--transition-fast);
}

.author-category-chip:hover {
    border-color: var(--cat-color);
    color: var(--cat-color);
}

.author-category-chip span {
    font-size: 0.6875rem;
    color: var(--text-muted);
}

/* ========================================
   Search Page
   ======================================== */

.search-header {
    background: var(--bg-secondary);
    padding: var(--space-2xl) 0;
}

.search-page-title {
    font-size: clamp(2rem, 5vw, 3rem);
    text-align: center;
    margin-bottom: var(--space-xl);
}

.search-form-main {
    max-width: 700px;
    margin: 0 auto;
}

.search-input-wrapper {
    display: flex;
    gap: var(--space-sm);
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: var(--radius-lg);
    padding: var(--space-sm);
    align-items: center;
}

.search-input-wrapper .search-icon {
    margin-left: var(--space-md);
    color: var(--text-muted);
    flex-shrink: 0;
}

.search-input-main {
    flex: 1;
    padding: var(--space-md);
    background: transparent;
    border: none;
    color: var(--text-primary);
    font-size: 1.125rem;
}

.search-input-main:focus {
    outline: none;
}

.search-input-wrapper .btn {
    flex-shrink: 0;
}

.search-filters {
    display: flex;
    gap: var(--space-md);
    margin-top: var(--space-md);
    justify-content: center;
}

.search-filter-select {
    padding: var(--space-sm) var(--space-md);
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: var(--radius-md);
    color: var(--text-secondary);
    font-size: 0.875rem;
    cursor: pointer;
}

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

/* Search Results */
.search-results-header {
    margin-bottom: var(--space-xl);
}

.search-results-count {
    font-size: 1rem;
    color: var(--text-secondary);
}

.search-results-list {
    display: flex;
    flex-direction: column;
    gap: var(--space-lg);
}

.search-result-item {
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: var(--radius-lg);
    overflow: hidden;
    transition: border-color var(--transition-fast);
}

.search-result-item:hover {
    border-color: var(--border-light);
}

.search-result-link {
    display: grid;
    gap: var(--space-lg);
}

@media (min-width: 768px) {
    .search-result-link {
        grid-template-columns: 200px 1fr;
    }
}

.search-result-image {
    aspect-ratio: 16/10;
    overflow: hidden;
}

.search-result-image img {
    width: 100%;
    height: 100%;
    object-fit: cover;
}

.search-result-content {
    padding: var(--space-lg);
}

@media (min-width: 768px) {
    .search-result-content {
        padding: var(--space-lg) var(--space-lg) var(--space-lg) 0;
    }
}

.search-result-category {
    display: block;
    font-size: 0.6875rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    margin-bottom: var(--space-sm);
}

.search-result-title {
    font-size: 1.25rem;
    font-weight: 700;
    color: var(--text-primary);
    line-height: 1.3;
    margin-bottom: var(--space-sm);
}

.search-result-link:hover .search-result-title {
    color: var(--color-primary);
}

.search-result-excerpt {
    font-size: 0.9375rem;
    color: var(--text-secondary);
    line-height: 1.6;
    margin-bottom: var(--space-md);
}

.search-result-meta {
    display: flex;
    align-items: center;
    flex-wrap: wrap;
    gap: var(--space-sm);
    font-size: 0.8125rem;
    color: var(--text-muted);
}

/* Search Empty/No Results */
.search-empty,
.search-no-results {
    text-align: center;
    padding: var(--space-3xl);
}

.search-no-results h2 {
    margin-bottom: var(--space-md);
}

.search-suggestions {
    margin-top: var(--space-xl);
}

.search-suggestions h3 {
    font-size: 1rem;
    color: var(--text-primary);
    margin-bottom: var(--space-md);
}

.search-suggestions ul {
    list-style: none;
    color: var(--text-secondary);
}

.search-suggestions li {
    margin-bottom: var(--space-sm);
}

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

.suggestion-tag {
    padding: var(--space-sm) var(--space-md);
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: 9999px;
    font-size: 0.875rem;
    color: var(--text-secondary);
}

.suggestion-tag:hover {
    border-color: var(--color-primary);
    color: var(--color-primary);
}

/* ========================================
   Latest / Archive Page
   ======================================== */

.page-header {
    background: var(--bg-secondary);
    padding: var(--space-2xl) 0;
}

.page-title {
    font-size: clamp(2rem, 5vw, 3rem);
    margin-bottom: var(--space-sm);
}

.page-subtitle {
    font-size: 1rem;
    color: var(--text-muted);
}

/* Latest Layout */
.latest-layout {
    display: grid;
    gap: var(--space-2xl);
}

@media (min-width: 1024px) {
    .latest-layout {
        grid-template-columns: 1fr 280px;
    }
}

.latest-main {
    min-width: 0;
}

.latest-sidebar {
    display: none;
}

@media (min-width: 1024px) {
    .latest-sidebar {
        display: block;
    }
}

/* Date Separator */
.date-separator {
    padding: var(--space-md) 0;
    margin-bottom: var(--space-md);
    border-bottom: 1px solid var(--border);
}

.date-separator span {
    font-size: 0.8125rem;
    font-weight: 600;
    color: var(--text-muted);
    text-transform: uppercase;
    letter-spacing: 0.05em;
}

/* Article List Item */
.articles-list {
    display: flex;
    flex-direction: column;
}

.article-list-item {
    border-bottom: 1px solid var(--border);
}

.article-list-item:last-child {
    border-bottom: none;
}

.article-list-link {
    display: grid;
    gap: var(--space-lg);
    padding: var(--space-lg) 0;
}

@media (min-width: 640px) {
    .article-list-link {
        grid-template-columns: 180px 1fr;
    }
}

.article-list-image {
    aspect-ratio: 16/10;
    border-radius: var(--radius-md);
    overflow: hidden;
}

.article-list-image img {
    width: 100%;
    height: 100%;
    object-fit: cover;
}

.article-list-content {
    display: flex;
    flex-direction: column;
    justify-content: center;
}

.article-list-category {
    display: block;
    font-size: 0.6875rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    margin-bottom: var(--space-sm);
}

.article-list-title {
    font-size: 1.25rem;
    font-weight: 700;
    color: var(--text-primary);
    line-height: 1.3;
    margin-bottom: var(--space-sm);
}

.article-list-link:hover .article-list-title {
    color: var(--color-primary);
}

.article-list-excerpt {
    font-size: 0.9375rem;
    color: var(--text-secondary);
    line-height: 1.6;
    margin-bottom: var(--space-md);
    display: -webkit-box;
    -webkit-line-clamp: 2;
    -webkit-box-orient: vertical;
    overflow: hidden;
}

.article-list-meta {
    display: flex;
    align-items: center;
    gap: var(--space-sm);
    font-size: 0.8125rem;
    color: var(--text-muted);
}

.article-list-author-avatar {
    width: 20px;
    height: 20px;
    border-radius: 50%;
    object-fit: cover;
}

/* Archive List */
.archive-list {
    list-style: none;
}

.archive-year {
    margin-bottom: var(--space-md);
}

.archive-year-link {
    display: block;
    font-weight: 600;
    color: var(--text-primary);
    padding: var(--space-sm) 0;
}

.archive-year-link:hover,
.archive-year-link.active {
    color: var(--color-primary);
}

.archive-months {
    list-style: none;
    margin-left: var(--space-md);
}

.archive-month-link {
    display: flex;
    justify-content: space-between;
    padding: var(--space-xs) 0;
    font-size: 0.875rem;
    color: var(--text-secondary);
}

.archive-month-link:hover,
.archive-month-link.active {
    color: var(--color-primary);
}

.archive-count {
    font-size: 0.75rem;
    color: var(--text-muted);
}

/* ========================================
   About Page
   ======================================== */

.about-hero {
    background: var(--bg-secondary);
    padding: var(--space-3xl) 0;
    text-align: center;
}

.about-title {
    font-size: clamp(2.5rem, 6vw, 4rem);
    margin-bottom: var(--space-lg);
}

.about-subtitle {
    font-size: 1.25rem;
    color: var(--text-secondary);
    max-width: 600px;
    margin: 0 auto;
}

/* Mission Section */
.section-mission {
    padding: var(--space-3xl) 0;
}

.section-mission .prose {
    font-size: 1.0625rem;
}

.section-mission .prose h2 {
    font-size: 1.5rem;
    margin-top: var(--space-2xl);
}

/* Stats Grid Large */
.stats-grid-large {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(150px, 1fr));
    gap: var(--space-xl);
    text-align: center;
}

.stat-item {
    padding: var(--space-xl);
}

.stat-number {
    display: block;
    font-size: clamp(2.5rem, 5vw, 4rem);
    font-weight: 700;
    color: var(--color-primary);
    line-height: 1;
    margin-bottom: var(--space-sm);
}

.stat-label {
    font-size: 0.875rem;
    color: var(--text-muted);
    text-transform: uppercase;
    letter-spacing: 0.05em;
}

/* Section Title Center */
.section-title-center {
    justify-content: center;
    text-align: center;
}

.section-subtitle {
    text-align: center;
    color: var(--text-secondary);
    max-width: 600px;
    margin: calc(-1 * var(--space-md)) auto var(--space-2xl);
}

/* Team Grid */
.team-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(200px, 1fr));
    gap: var(--space-xl);
}

.team-member {
    display: flex;
    flex-direction: column;
    align-items: center;
    text-align: center;
    padding: var(--space-xl);
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: var(--radius-lg);
    transition: all var(--transition-fast);
}

.team-member:hover {
    border-color: var(--color-primary);
}

.team-member-photo {
    width: 100px;
    height: 100px;
    border-radius: 50%;
    overflow: hidden;
    margin-bottom: var(--space-md);
}

.team-member-photo img {
    width: 100%;
    height: 100%;
    object-fit: cover;
}

.team-member-placeholder {
    width: 100%;
    height: 100%;
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--bg-tertiary);
    font-size: 2.5rem;
    font-weight: 700;
    color: var(--text-muted);
}

.team-member-name {
    font-size: 1.125rem;
    font-weight: 700;
    color: var(--text-primary);
    margin-bottom: var(--space-xs);
}

.team-member-title {
    font-size: 0.8125rem;
    color: var(--color-primary);
    margin-bottom: var(--space-sm);
}

.team-member-bio {
    font-size: 0.8125rem;
    color: var(--text-secondary);
    line-height: 1.5;
    margin-bottom: var(--space-md);
}

.team-member-social {
    display: flex;
    gap: var(--space-sm);
    color: var(--text-muted);
}

.team-member:hover .team-member-social {
    color: var(--color-primary);
}

/* Contact Section */
.contact-info {
    text-align: center;
}

.contact-info p {
    margin-bottom: var(--space-xl);
}

.contact-methods {
    display: flex;
    justify-content: center;
    gap: var(--space-lg);
    flex-wrap: wrap;
}

.contact-method {
    display: flex;
    align-items: center;
    gap: var(--space-sm);
    padding: var(--space-md) var(--space-xl);
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: var(--radius-lg);
    color: var(--text-secondary);
    transition: all var(--transition-fast);
}

.contact-method:hover {
    border-color: var(--color-primary);
    color: var(--color-primary);
}

/* Newsletter CTA */
.newsletter-cta-box {
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: var(--radius-lg);
    padding: var(--space-2xl);
    text-align: center;
}

.newsletter-cta-box h2 {
    margin-bottom: var(--space-sm);
}

.newsletter-cta-box > p {
    color: var(--text-secondary);
    margin-bottom: var(--space-xl);
}

.newsletter-form-inline {
    display: flex;
    gap: var(--space-sm);
    max-width: 500px;
    margin: 0 auto var(--space-md);
}

.newsletter-form-inline input {
    flex: 1;
    padding: var(--space-md) var(--space-lg);
    background: var(--bg-primary);
    border: 1px solid var(--border);
    border-radius: var(--radius-md);
    color: var(--text-primary);
}

.newsletter-form-inline input:focus {
    outline: none;
    border-color: var(--color-primary);
}

.newsletter-privacy {
    font-size: 0.75rem;
    color: var(--text-muted);
}

/* ========================================
   Legal Pages (Privacy, Terms, Cookies)
   ======================================== */

.legal-page {
    padding-bottom: var(--space-3xl);
}

.legal-header {
    background: var(--bg-secondary);
    padding: var(--space-3xl) 0;
    text-align: center;
}

.legal-header h1 {
    font-size: clamp(2rem, 5vw, 3rem);
    margin-bottom: var(--space-sm);
}

.legal-updated {
    font-size: 0.875rem;
    color: var(--text-muted);
}

.section-legal .prose {
    font-size: 1rem;
}

.section-legal .prose h2 {
    font-size: 1.5rem;
    margin-top: var(--space-2xl);
    padding-top: var(--space-lg);
    border-top: 1px solid var(--border);
}

.section-legal .prose h2:first-child {
    margin-top: 0;
    padding-top: 0;
    border-top: none;
}

.section-legal .prose h3 {
    font-size: 1.125rem;
    margin-top: var(--space-xl);
}

/* ========================================
   Responsive Adjustments
   ======================================== */

@media (max-width: 767px) {
    /* Mobile navigation */
    .mobile-menu-btn {
        display: flex;
    }

    /* Hero adjustments */
    .hero-grid {
        grid-template-columns: 1fr;
    }

    .featured-secondary {
        display: grid;
        grid-template-columns: 1fr 1fr;
    }

    /* Article page */
    .article-content-wrapper {
        flex-direction: column;
    }

    .author-box {
        flex-direction: column;
        text-align: center;
    }

    .author-box-header {
        flex-direction: column;
        align-items: center;
        gap: var(--space-md);
    }

    /* Search */
    .search-filters {
        flex-direction: column;
    }

    .search-filter-select {
        width: 100%;
    }

    /* Pagination */
    .pagination-prev,
    .pagination-next {
        display: none;
    }

    /* Featured card horizontal */
    .featured-card-horizontal .featured-card-link {
        grid-template-columns: 1fr;
    }

    /* Newsletter form */
    .newsletter-input-group {
        flex-direction: column;
    }

    .newsletter-form-inline {
        flex-direction: column;
    }
}

@media (max-width: 480px) {
    .featured-secondary {
        grid-template-columns: 1fr;
    }

    .articles-grid-3,
    .articles-grid-4 {
        grid-template-columns: 1fr;
    }

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

    .stats-grid-large {
        grid-template-columns: 1fr;
    }
}

/* ========================================
   Interactive Components (JS Features)
   ======================================== */

/* Toast Notifications */
.toast {
    position: fixed;
    bottom: 2rem;
    left: 50%;
    transform: translateX(-50%) translateY(100%);
    background: var(--bg-tertiary);
    color: var(--text-primary);
    padding: 0.875rem 1.5rem;
    border-radius: var(--radius-md);
    font-size: 0.875rem;
    font-weight: 500;
    box-shadow: var(--shadow-lg);
    z-index: 9999;
    opacity: 0;
    transition: transform 0.3s ease, opacity 0.3s ease;
}

.toast.show {
    transform: translateX(-50%) translateY(0);
    opacity: 1;
}

/* Lightbox */
.lightbox-overlay {
    position: fixed;
    inset: 0;
    background: rgba(0, 0, 0, 0.95);
    z-index: 9999;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 2rem;
    opacity: 0;
    transition: opacity 0.3s ease;
}

.lightbox-overlay.is-open {
    opacity: 1;
}

.lightbox-image {
    max-width: 100%;
    max-height: 90vh;
    object-fit: contain;
    border-radius: var(--radius-sm);
}

.lightbox-close {
    position: absolute;
    top: 1rem;
    right: 1rem;
    width: 3rem;
    height: 3rem;
    background: rgba(255, 255, 255, 0.1);
    border: none;
    border-radius: 50%;
    color: white;
    font-size: 1.5rem;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: background 0.2s;
}

.lightbox-close:hover {
    background: rgba(255, 255, 255, 0.2);
}

.lightbox-caption {
    position: absolute;
    bottom: 1rem;
    left: 50%;
    transform: translateX(-50%);
    color: rgba(255, 255, 255, 0.8);
    font-size: 0.875rem;
    text-align: center;
    max-width: 80%;
}

/* Table of Contents */
.toc {
    background: var(--bg-secondary);
    border: 1px solid var(--border);
    border-radius: var(--radius-lg);
    padding: var(--space-lg);
    margin-bottom: var(--space-xl);
}

.toc-title {
    font-size: 0.875rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    color: var(--text-muted);
    margin-bottom: var(--space-md);
}

.toc-list {
    list-style: none;
    padding: 0;
    margin: 0;
}

.toc-item {
    margin-bottom: 0.5rem;
}

.toc-h3 {
    padding-left: 1rem;
}

.toc-link {
    color: var(--text-secondary);
    text-decoration: none;
    font-size: 0.9375rem;
    transition: color 0.2s;
    display: block;
    padding: 0.25rem 0;
}

.toc-link:hover,
.toc-link.is-active {
    color: var(--accent);
}

/* Bookmark Button States */
.btn-bookmark.is-saved {
    color: var(--accent);
    background: rgba(99, 102, 241, 0.1);
    border-color: var(--accent);
}

/* Share Buttons */
.share-buttons {
    display: flex;
    gap: 0.5rem;
    flex-wrap: wrap;
}

.share-btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 2.5rem;
    height: 2.5rem;
    border-radius: var(--radius-md);
    background: var(--bg-secondary);
    border: 1px solid var(--border);
    color: var(--text-secondary);
    transition: all 0.2s;
    cursor: pointer;
}

.share-btn:hover {
    background: var(--bg-tertiary);
    color: var(--text-primary);
}

.share-btn.twitter:hover { background: #1DA1F2; color: white; border-color: #1DA1F2; }
.share-btn.facebook:hover { background: #4267B2; color: white; border-color: #4267B2; }
.share-btn.linkedin:hover { background: #0A66C2; color: white; border-color: #0A66C2; }
.share-btn.reddit:hover { background: #FF4500; color: white; border-color: #FF4500; }

/* Scroll Progress Bar */
.scroll-progress {
    position: fixed;
    top: 0;
    left: 0;
    height: 3px;
    background: var(--accent);
    z-index: 9998;
    width: 0%;
    transition: width 0.1s linear;
}

/* Theme Toggle */
.theme-toggle {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 2.5rem;
    height: 2.5rem;
    border-radius: var(--radius-md);
    background: var(--bg-secondary);
    border: 1px solid var(--border);
    color: var(--text-secondary);
    cursor: pointer;
    transition: all 0.2s;
}

.theme-toggle:hover {
    background: var(--bg-tertiary);
    color: var(--text-primary);
}

/* Search Modal */
.search-modal {
    position: fixed;
    inset: 0;
    background: rgba(0, 0, 0, 0.8);
    z-index: 9999;
    display: flex;
    align-items: flex-start;
    justify-content: center;
    padding: 10vh 1rem;
    opacity: 0;
    visibility: hidden;
    transition: opacity 0.2s, visibility 0.2s;
}

.search-modal.is-open {
    opacity: 1;
    visibility: visible;
}

.search-modal-content {
    width: 100%;
    max-width: 600px;
    background: var(--bg-primary);
    border-radius: var(--radius-lg);
    overflow: hidden;
    box-shadow: var(--shadow-xl);
}

.search-modal-input {
    width: 100%;
    padding: 1.25rem;
    font-size: 1.125rem;
    border: none;
    background: transparent;
    color: var(--text-primary);
    outline: none;
}

.search-modal-input::placeholder {
    color: var(--text-muted);
}

/* Reading List Page */
.reading-list-empty {
    text-align: center;
    padding: var(--space-3xl);
}

.reading-list-empty-icon {
    font-size: 4rem;
    color: var(--text-muted);
    margin-bottom: var(--space-lg);
}

.reading-list-item {
    background: var(--bg-secondary);
    border: 1px solid var(--border);
    border-radius: var(--radius-lg);
    padding: var(--space-lg);
    display: flex;
    gap: var(--space-lg);
    margin-bottom: var(--space-md);
    transition: border-color 0.2s;
}

.reading-list-item:hover {
    border-color: var(--accent);
}

.reading-list-item-content {
    flex: 1;
}

.reading-list-item-title {
    font-size: 1.125rem;
    font-weight: 600;
    margin-bottom: 0.5rem;
}

.reading-list-item-title a {
    color: var(--text-primary);
    text-decoration: none;
}

.reading-list-item-title a:hover {
    color: var(--accent);
}

.reading-list-item-meta {
    font-size: 0.875rem;
    color: var(--text-muted);
}

.reading-list-item-remove {
    color: var(--text-muted);
    cursor: pointer;
    transition: color 0.2s;
}

.reading-list-item-remove:hover {
    color: var(--danger);
}

/* ========================================
   Keyboard Shortcuts
   ======================================== */

/* Keyboard focus on article cards */
.article-card.keyboard-focus,
.article-grid-item.keyboard-focus,
.latest-item.keyboard-focus {
    outline: 2px solid var(--accent);
    outline-offset: 4px;
}

/* Shortcuts modal */
.shortcuts-modal {
    position: fixed;
    inset: 0;
    background: rgba(0, 0, 0, 0.8);
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 9999;
    opacity: 0;
    transition: opacity 0.2s;
}

.shortcuts-modal.is-open {
    opacity: 1;
}

.shortcuts-content {
    background: var(--bg-primary);
    border: 1px solid var(--border);
    border-radius: var(--radius-lg);
    padding: var(--space-xl);
    max-width: 400px;
    width: 90%;
    position: relative;
}

.shortcuts-content h3 {
    margin: 0 0 var(--space-lg);
    font-size: 1.25rem;
}

.shortcuts-grid {
    display: grid;
    gap: var(--space-sm);
}

.shortcut {
    display: flex;
    align-items: center;
    gap: var(--space-md);
    font-size: 0.9rem;
    color: var(--text-secondary);
}

.shortcut kbd {
    background: var(--bg-tertiary);
    border: 1px solid var(--border);
    border-radius: var(--radius-sm);
    padding: 0.25rem 0.5rem;
    font-family: var(--font-mono);
    font-size: 0.8rem;
    min-width: 1.5rem;
    text-align: center;
}

.shortcuts-close {
    position: absolute;
    top: var(--space-md);
    right: var(--space-md);
    background: none;
    border: none;
    font-size: 1.5rem;
    color: var(--text-muted);
    cursor: pointer;
    line-height: 1;
}

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

/* ========================================
   Reading Position Memory
   ======================================== */

.reading-position-prompt {
    position: fixed;
    bottom: var(--space-lg);
    left: 50%;
    transform: translateX(-50%) translateY(100px);
    background: var(--bg-primary);
    border: 1px solid var(--border);
    border-radius: var(--radius-lg);
    padding: var(--space-md) var(--space-lg);
    display: flex;
    align-items: center;
    gap: var(--space-md);
    box-shadow: 0 4px 20px rgba(0, 0, 0, 0.3);
    z-index: 1000;
    opacity: 0;
    transition: transform 0.3s, opacity 0.3s;
}

.reading-position-prompt.is-visible {
    transform: translateX(-50%) translateY(0);
    opacity: 1;
}

.reading-position-prompt span {
    font-size: 0.9rem;
    color: var(--text-secondary);
}

.reading-position-prompt .btn-continue {
    background: var(--accent);
    color: white;
    border: none;
    padding: 0.5rem 1rem;
    border-radius: var(--radius-md);
    font-size: 0.875rem;
    cursor: pointer;
    transition: background 0.2s;
}

.reading-position-prompt .btn-continue:hover {
    background: var(--accent-hover);
}

.reading-position-prompt .btn-dismiss {
    background: none;
    border: none;
    color: var(--text-muted);
    font-size: 1.25rem;
    cursor: pointer;
    line-height: 1;
    padding: 0.25rem;
}

.reading-position-prompt .btn-dismiss:hover {
    color: var(--text-primary);
}

/* ========================================
   Print Stylesheet
   ======================================== */

@media print {
    /* Hide non-essential elements */
    .site-header,
    .site-footer,
    .mobile-nav,
    .search-modal,
    .lightbox-overlay,
    .shortcuts-modal,
    .reading-position-prompt,
    .toast,
    .reading-progress,
    .share-buttons,
    .article-actions,
    .related-articles,
    .newsletter-section,
    .toc,
    .breadcrumbs,
    .category-badge,
    nav,
    aside,
    button,
    .btn {
        display: none !important;
    }

    /* Reset colors for print */
    body {
        background: white !important;
        color: black !important;
        font-size: 12pt;
        line-height: 1.5;
    }

    .article-page,
    .article-content {
        max-width: 100% !important;
        padding: 0 !important;
        margin: 0 !important;
    }

    .article-title {
        font-size: 24pt;
        margin-bottom: 12pt;
        color: black !important;
    }

    .article-meta {
        margin-bottom: 24pt;
        padding-bottom: 12pt;
        border-bottom: 1px solid #ccc;
    }

    .article-content h2 {
        font-size: 18pt;
        margin-top: 24pt;
        page-break-after: avoid;
    }

    .article-content h3 {
        font-size: 14pt;
        margin-top: 18pt;
        page-break-after: avoid;
    }

    .article-content p {
        orphans: 3;
        widows: 3;
    }

    .article-content img {
        max-width: 100%;
        page-break-inside: avoid;
    }

    .article-content a {
        color: black;
        text-decoration: underline;
    }

    .article-content a[href^="http"]:after {
        content: " (" attr(href) ")";
        font-size: 0.8em;
        color: #666;
    }

    /* Author box for print */
    .author-box {
        border: 1px solid #ccc;
        padding: 12pt;
        margin-top: 24pt;
        page-break-inside: avoid;
    }

    /* Page breaks */
    h2, h3 {
        page-break-after: avoid;
    }

    .article-content > *:first-child {
        page-break-before: avoid;
    }
}

/* ========================================
   Accessibility (a11y)
   ======================================== */

/* Focus-visible: Show focus only for keyboard navigation, not mouse clicks */
*:focus {
    outline: none;
}

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

/* Skip link improvements */
.skip-link {
    position: absolute;
    top: -100px;
    left: 50%;
    transform: translateX(-50%);
    background: var(--accent);
    color: var(--bg-primary);
    padding: 0.75rem 1.5rem;
    border-radius: var(--radius);
    z-index: 10000;
    font-weight: 600;
    text-decoration: none;
    transition: top 0.2s;
}

.skip-link:focus {
    top: var(--space-md);
}

/* Ensure links in content have visible underlines */
.article-content a:not(.btn) {
    text-decoration: underline;
    text-decoration-color: var(--accent);
    text-underline-offset: 2px;
}

.article-content a:not(.btn):hover {
    text-decoration-thickness: 2px;
}

/* High contrast mode support */
@media (prefers-contrast: high) {
    :root {
        --border: #666;
        --text-secondary: #ccc;
        --text-muted: #aaa;
    }

    .article-card,
    .btn,
    input,
    select,
    textarea {
        border-width: 2px;
    }
}

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

    .reading-progress {
        display: none;
    }
}

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

/* Ensure buttons and links have minimum touch target (44x44px) */
@media (pointer: coarse) {
    .btn,
    .nav-link,
    .header-btn,
    .pagination-number,
    .tag-link,
    .share-btn {
        min-height: 44px;
        min-width: 44px;
    }
}

/* Visible focus for form elements */
input:focus-visible,
select:focus-visible,
textarea:focus-visible {
    outline: 2px solid var(--accent);
    outline-offset: 2px;
    border-color: var(--accent);
}

/* Button focus states */
.btn:focus-visible,
.header-btn:focus-visible,
.share-btn:focus-visible {
    outline: 2px solid var(--accent);
    outline-offset: 2px;
}

/* Navigation focus */
.nav-link:focus-visible,
.mobile-nav-link:focus-visible,
.dropdown-link:focus-visible {
    outline: 2px solid var(--accent);
    outline-offset: 2px;
    background: var(--bg-tertiary);
}

/* Card focus states */
.article-card:focus-within,
.article-card-link:focus-visible {
    outline: 2px solid var(--accent);
    outline-offset: 4px;
}

/* Pagination focus */
.pagination-number:focus-visible,
.pagination-prev:focus-visible,
.pagination-next:focus-visible {
    outline: 2px solid var(--accent);
    outline-offset: 2px;
}

/* Error/warning states for form validation */
input:invalid:not(:placeholder-shown),
select:invalid:not(:placeholder-shown),
textarea:invalid:not(:placeholder-shown) {
    border-color: var(--danger);
}

/* Loading state indicator */
[aria-busy="true"] {
    cursor: wait;
}

/* Disabled state */
[aria-disabled="true"],
[disabled] {
    opacity: 0.5;
    cursor: not-allowed;
    pointer-events: none;
}