/* CSS Custom Properties */
:root {
    /* Modern Color Palette */
    --color-background: #fafafa;
    --color-surface: #ffffff;
    --color-surface-elevated: #ffffff;
    --color-border-light: #e2e8f0;
    --color-border: #cbd5e1;

    /* Text Colors */
    --color-text-primary: #0f172a;
    --color-text-secondary: #475569;
    --color-text-tertiary: #94a3b8;
    --color-text-inverse: #ffffff;

    /* Brand Colors */
    --color-primary: #3b82f6;
    --color-primary-hover: #2563eb;
    --color-accent: #d97706;
    --color-accent-light: #fed7aa;
    --color-success: #10b981;

    /* Typography - Modern System Font Stacks */
    --font-heading: -apple-system, BlinkMacSystemFont, "Segoe UI Variable Display", "Segoe UI", Roboto, "Helvetica Neue", "Arial Nova", "Noto Sans", Arial, sans-serif, "Apple Color Emoji", "Segoe UI Emoji";
    --font-body: ui-serif, -apple-system-ui-serif, "New York", "Iowan Old Style", "Apple Garamond", Baskerville, "Times New Roman", "Droid Serif", "Source Serif Pro", serif, "Apple Color Emoji", "Segoe UI Emoji";
    --font-mono: ui-monospace, "SF Mono", "Cascadia Code", "Segoe UI Mono", "Roboto Mono", Menlo, Monaco, Consolas, "Liberation Mono", "Courier New", monospace;
    
    /* Spacing */
    --space-xs: 0.5rem;
    --space-sm: 1rem;
    --space-md: 1.5rem;
    --space-lg: 2rem;
    --space-xl: 3rem;
    --space-2xl: 4rem;
    
    /* Border Radius */
    --radius-sm: 0.375rem;
    --radius-md: 0.5rem;
    --radius-lg: 0.75rem;
    --radius-xl: 1rem;
    
    /* Shadows */
    --shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, 0.05);
    --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.1), 0 2px 4px -1px rgba(0, 0, 0, 0.06);
    --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.1), 0 4px 6px -2px rgba(0, 0, 0, 0.05);
    --shadow-xl: 0 20px 25px -5px rgba(0, 0, 0, 0.1), 0 10px 10px -5px rgba(0, 0, 0, 0.04);
}

/* Reset and base styles */
*,
*::before,
*::after {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

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

body {
    font-family: var(--font-body);
    font-size: 1.125rem;
    line-height: 1.7;
    color: var(--color-text-primary);
    background-color: var(--color-background);
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

/* Modern Navigation */
.site-header {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    background: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(10px);
    -webkit-backdrop-filter: blur(10px);
    border-bottom: 1px solid var(--color-border-light);
    z-index: 1000;
    transition: all 0.3s ease;
}

.navbar {
    max-width: 1400px;
    margin: 0 auto;
    padding: var(--space-sm) var(--space-lg);
}

.nav-container {
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.nav-brand {
    font-family: var(--font-heading);
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--color-text-primary);
    text-decoration: none;
    letter-spacing: -0.025em;
}

.nav-menu {
    display: flex;
    gap: var(--space-lg);
    align-items: center;
}

.nav-link {
    font-family: var(--font-heading);
    color: var(--color-text-secondary);
    text-decoration: none;
    font-weight: 500;
    font-size: 0.95rem;
    transition: all 0.2s ease;
    padding: var(--space-xs) var(--space-sm);
    border-radius: var(--radius-md);
    position: relative;
}

.nav-link:hover {
    color: var(--color-primary);
    background-color: rgba(59, 130, 246, 0.1);
}

/* Add space for fixed header */
.site-main {
    padding-top: 6rem;
}

/* Main content container */
.site-main {
    max-width: 1400px;
    margin: 0 auto;
    padding: 0 var(--space-lg);
}

/* Homepage Layout */
.home-container {
    display: grid;
    grid-template-columns: 400px 1fr;
    gap: var(--space-2xl);
    align-items: start;
    margin-top: var(--space-lg);
}

/* Profile Info in Sidebar */
.profile-info {
    margin-bottom: var(--space-lg);
    text-align: center;
    padding-bottom: var(--space-md);
    border-bottom: 1px solid rgba(203, 213, 225, 0.3);
}

.profile-name {
    font-family: var(--font-heading);
    font-size: 1.75rem;
    font-weight: 700;
    color: var(--color-text-primary);
    margin-bottom: var(--space-xs);
    letter-spacing: -0.025em;
    line-height: 1.1;
}

.profile-title {
    font-family: var(--font-heading);
    font-size: 0.875rem;
    font-weight: 600;
    color: var(--color-primary);
    text-transform: uppercase;
    letter-spacing: 0.025em;
    margin-bottom: var(--space-xs);
}

.profile-affiliation {
    color: var(--color-text-secondary);
    font-size: 0.875rem;
    line-height: 1.3;
}

/* Modern Sidebar */
.sidebar {
    background: var(--color-surface);
    padding: var(--space-lg);
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-sm);
    border: none;
    height: fit-content;
    position: sticky;
    top: calc(6rem + var(--space-lg));
}

.profile-image {
    width: 100%;
    max-width: 280px;
    aspect-ratio: 1;
    object-fit: cover;
    border-radius: var(--radius-lg);
    margin-bottom: var(--space-lg);
    box-shadow: var(--shadow-sm);
    transition: transform 0.3s ease, box-shadow 0.3s ease;
}

.profile-image:hover {
    transform: translateY(-1px);
    box-shadow: var(--shadow-md);
}

.contact-section h3 {
    font-family: var(--font-heading);
    color: var(--color-text-primary);
    font-size: 1rem;
    font-weight: 600;
    margin-bottom: var(--space-sm);
    letter-spacing: -0.025em;
}

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

.contact-item {
    margin-bottom: var(--space-sm);
    padding-bottom: var(--space-sm);
    border-bottom: 1px solid rgba(203, 213, 225, 0.3);
}

.contact-item:last-child {
    border-bottom: none;
    margin-bottom: 0;
    padding-bottom: 0;
}

.contact-label {
    font-family: var(--font-heading);
    font-weight: 600;
    color: var(--color-text-secondary);
    display: block;
    margin-bottom: 0.25rem;
    font-size: 0.8rem;
    text-transform: uppercase;
    letter-spacing: 0.05em;
}

.contact-value {
    color: var(--color-text-primary);
    line-height: 1.4;
    font-size: 0.9rem;
}

.contact-value a,
.contact-value a:visited,
.contact-value a:link {
    color: var(--color-text-primary) !important;
    text-decoration: none !important;
    border-bottom: 1px solid transparent;
    transition: all 0.2s ease;
}

.contact-value a:hover,
.contact-value a:visited:hover,
.contact-value a:link:hover {
    color: var(--color-primary) !important;
    border-bottom-color: var(--color-primary) !important;
}

/* Modern Main Content */
.main-content {
    background: var(--color-surface);
    padding: var(--space-2xl);
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-sm);
    border: none;
}

.section {
    margin-bottom: var(--space-2xl);
    position: relative;
}

.section:last-child {
    margin-bottom: 0;
}

.section h2 {
    font-family: var(--font-heading);
    color: var(--color-text-primary);
    font-size: clamp(1.5rem, 3vw, 2rem);
    font-weight: 700;
    margin-bottom: var(--space-md);
    letter-spacing: -0.025em;
}

.section h3 {
    font-family: var(--font-heading);
    color: var(--color-text-primary);
    font-size: 1.25rem;
    font-weight: 600;
    margin-bottom: var(--space-md);
    letter-spacing: -0.025em;
}

.section p {
    margin-bottom: var(--space-md);
    line-height: 1.7;
}

/* Research Highlight Card */
.research-highlight,
.teaching-highlight {
    background: var(--color-surface);
    color: var(--color-text-primary);
    padding: 0;
    border-radius: 0;
    margin-top: var(--space-xl);
    margin-bottom: var(--space-xl);
    border: none;
    box-shadow: none;
}

.research-highlight h3,
.teaching-highlight h3 {
    font-family: var(--font-heading);
    color: var(--color-text-primary);
    font-size: clamp(1.25rem, 2.5vw, 1.5rem);
    font-weight: 700;
    margin-bottom: var(--space-md);
    letter-spacing: -0.025em;
}

.research-areas-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: var(--space-md);
    margin-bottom: var(--space-md);
}

@media (max-width: 768px) {
    .research-areas-grid {
        grid-template-columns: 1fr;
    }
}

.research-area {
    display: flex;
    align-items: flex-start;
    gap: var(--space-sm);
    padding: var(--space-lg);
    background: rgba(59, 130, 246, 0.02);
    border: none;
    border-radius: var(--radius-md);
    transition: all 0.2s ease;
    border-left: 3px solid transparent;
}

.research-area:hover {
    background: rgba(59, 130, 246, 0.05);
    border-left-color: var(--color-primary);
}

.research-area i {
    color: var(--color-primary);
    font-size: 1.25rem;
    margin-top: 2px;
    flex-shrink: 0;
    transition: color 0.2s ease;
}

.research-area:hover i {
    color: var(--color-accent);
}

.area-content {
    display: flex;
    flex-direction: column;
    gap: var(--space-xs);
}

.area-content strong {
    font-family: var(--font-heading);
    font-weight: 600;
    color: var(--color-text-primary);
    font-size: 1rem;
}

.area-content span {
    color: var(--color-text-secondary);
    font-size: 0.9rem;
    line-height: 1.4;
}

/* Teaching Classes Grid */
.teaching-classes-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: var(--space-md);
    margin-bottom: var(--space-md);
}

@media (max-width: 768px) {
    .teaching-classes-grid {
        grid-template-columns: 1fr;
    }
}

.teaching-class {
    display: flex;
    align-items: flex-start;
    gap: var(--space-sm);
    padding: var(--space-lg);
    background: rgba(59, 130, 246, 0.02);
    border: none;
    border-radius: var(--radius-md);
    transition: all 0.2s ease;
    border-left: 3px solid transparent;
}

.teaching-class:hover {
    background: rgba(59, 130, 246, 0.05);
    border-left-color: var(--color-primary);
}

.teaching-class i {
    color: var(--color-primary);
    font-size: 1.25rem;
    margin-top: 2px;
    flex-shrink: 0;
    transition: color 0.2s ease;
}

.teaching-class:hover i {
    color: var(--color-accent);
}

.class-content {
    display: flex;
    flex-direction: column;
    gap: var(--space-xs);
}

.class-content strong {
    font-family: var(--font-heading);
    font-weight: 600;
    color: var(--color-text-primary);
    font-size: 1rem;
}

.class-content strong a {
    color: inherit;
    text-decoration: none;
}

.class-content strong a:hover {
    color: var(--color-accent);
    text-decoration: underline;
}

.class-content span {
    color: var(--color-text-secondary);
    font-size: 0.9rem;
    line-height: 1.4;
}

.group-membership {
    color: var(--color-text-secondary);
    font-size: 0.95rem;
    text-align: center;
    margin: 0;
    font-style: italic;
}

/* Funding Grid */
.funding-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: var(--space-md);
    margin-top: var(--space-lg);
}

@media (max-width: 768px) {
    .funding-grid {
        grid-template-columns: 1fr;
    }
}

.funding-item {
    display: flex;
    align-items: flex-start;
    gap: var(--space-sm);
    padding: var(--space-lg);
    background: rgba(59, 130, 246, 0.02);
    border: none;
    border-radius: var(--radius-md);
    transition: all 0.2s ease;
    border-left: 3px solid transparent;
}

.funding-item:hover {
    background: rgba(59, 130, 246, 0.05);
    border-left-color: var(--color-primary);
}

.funding-item i {
    color: var(--color-primary);
    font-size: 1.25rem;
    margin-top: 2px;
    flex-shrink: 0;
    transition: color 0.2s ease;
}

.funding-item:hover i {
    color: var(--color-accent);
}

.funding-content {
    display: flex;
    flex-direction: column;
    gap: var(--space-xs);
}

.funding-content strong {
    font-family: var(--font-heading);
    font-weight: 600;
    color: var(--color-text-primary);
    font-size: 1rem;
}

.funding-content span {
    color: var(--color-text-secondary);
    font-size: 0.9rem;
    line-height: 1.4;
}

.funding-meta {
    margin-top: var(--space-xs);
    display: flex;
    flex-direction: column;
    gap: 4px;
}

.funding-status {
    color: var(--color-text-secondary);
    font-size: 0.85rem;
    line-height: 1.3;
}

.funding-period {
    color: var(--color-text-tertiary);
    font-size: 0.85rem;
    font-style: italic;
}

/* Modern Lists */
.interests-list {
    list-style: none;
    padding: 0;
    display: grid;
    gap: var(--space-sm);
}

.interests-list li {
    padding: var(--space-md) var(--space-lg);
    background: rgba(59, 130, 246, 0.02);
    border-radius: var(--radius-md);
    border: none;
    position: relative;
    transition: all 0.2s ease;
    display: flex;
    align-items: center;
    gap: var(--space-md);
}

.interests-list li:hover {
    background: rgba(59, 130, 246, 0.05);
}

.interests-list li::before {
    content: "▶";
    color: var(--color-primary);
    font-weight: 600;
    font-size: 0.875rem;
    transition: color 0.2s ease;
}

.interests-list li:hover::before {
    color: var(--color-accent);
}

/* Simple List - compact styling for service items */
.simple-list {
    list-style: disc;
    padding-left: var(--space-lg);
    margin: 0;
}

.simple-list li {
    margin-bottom: var(--space-xs);
    line-height: 1.5;
}

/* Education/Course Items */
.education-item {
    margin-bottom: var(--space-md);
    padding: var(--space-lg);
    background: rgba(59, 130, 246, 0.02);
    border-radius: var(--radius-md);
    border: none;
    border-left: 3px solid transparent;
    transition: all 0.2s ease;
}

.education-item:hover {
    background: rgba(59, 130, 246, 0.05);
    border-left-color: var(--color-primary);
}

.education-degree {
    font-family: var(--font-heading);
    font-weight: 600;
    color: var(--color-text-primary);
    font-size: 1.125rem;
    margin-bottom: var(--space-xs);
}

.education-degree a,
.education-degree a:visited,
.education-degree a:link {
    color: var(--color-text-primary) !important;
    text-decoration: none !important;
    border-bottom: 1px solid transparent;
    transition: all 0.2s ease;
}

.education-degree a:hover,
.education-degree a:visited:hover,
.education-degree a:link:hover {
    color: var(--color-primary) !important;
    border-bottom-color: var(--color-primary) !important;
}

.education-institution {
    color: var(--color-text-secondary);
    font-size: 0.95rem;
    line-height: 1.6;
}

/* Modern Social Links */
.social-links {
    display: flex;
    gap: var(--space-xs);
    margin-top: var(--space-lg);
    justify-content: center;
    flex-wrap: nowrap;
}

.social-links a {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 44px;
    height: 44px;
    background: rgba(59, 130, 246, 0.05);
    color: var(--color-text-secondary);
    border: none;
    border-radius: var(--radius-md);
    text-decoration: none;
    transition: all 0.2s ease;
    font-size: 1.125rem;
}

.social-links a:hover {
    background: var(--color-primary);
    color: var(--color-text-inverse);
    transform: translateY(-1px);
}

/* Modern Publications */
.publication {
    margin-bottom: var(--space-lg);
    padding: var(--space-xl);
    background: rgba(59, 130, 246, 0.02);
    border-radius: var(--radius-md);
    border: none;
    border-left: 3px solid transparent;
    transition: all 0.2s ease;
}

.publication:hover {
    background: rgba(59, 130, 246, 0.05);
    border-left-color: var(--color-primary);
}

.publication h3 {
    font-family: var(--font-heading);
    color: var(--color-text-primary);
    font-size: 1.25rem;
    font-weight: 600;
    margin-bottom: var(--space-sm);
    line-height: 1.4;
    letter-spacing: -0.025em;
}

.publication .authors {
    color: var(--color-text-secondary);
    margin-bottom: var(--space-sm);
    font-style: italic;
    font-size: 0.95rem;
}

.publication .venue {
    color: var(--color-accent);
    font-family: var(--font-heading);
    font-weight: 600;
    font-size: 0.9rem;
    margin-bottom: var(--space-md);
    text-transform: uppercase;
    letter-spacing: 0.025em;
}

.publication .links {
    display: flex;
    gap: var(--space-sm);
    flex-wrap: wrap;
}

.publication .links a {
    display: inline-flex;
    align-items: center;
    gap: var(--space-xs);
    padding: var(--space-xs) var(--space-md);
    background: var(--color-surface);
    color: var(--color-text-primary);
    text-decoration: none;
    border: 1px solid var(--color-border);
    border-radius: var(--radius-md);
    font-size: 0.875rem;
    font-weight: 500;
    transition: all 0.2s ease;
}

.publication .links a:hover {
    color: var(--color-primary);
    border-color: var(--color-primary);
    background: rgba(59, 130, 246, 0.05);
}

/* Modern Footer */
.site-footer {
    background: transparent;
    color: var(--color-text-secondary);
    padding: var(--space-lg) 0;
    margin-top: var(--space-2xl);
    border-top: 1px solid var(--color-border-light);
}

.footer-container {
    max-width: 1400px;
    margin: 0 auto;
    padding: 0 var(--space-lg);
    display: flex;
    justify-content: space-between;
    align-items: center;
    flex-wrap: wrap;
    gap: var(--space-lg);
}

.footer-container p {
    margin: 0;
    opacity: 0.7;
    font-size: 0.85rem;
    text-align: center;
}

/* Modern Responsive Design */
@media (max-width: 1400px) {
    .home-container {
        grid-template-columns: 360px 1fr;
        gap: var(--space-xl);
    }
}

@media (max-width: 1200px) {
    .home-container {
        grid-template-columns: 320px 1fr;
        gap: var(--space-lg);
    }
    
    .sidebar {
        position: static;
    }
    
    .profile-name {
        font-size: 2rem;
    }
}

@media (max-width: 768px) {
    .site-main {
        padding-top: 5rem;
        padding-left: var(--space-md);
        padding-right: var(--space-md);
    }
    
    .navbar {
        padding: var(--space-sm) var(--space-md);
    }
    
    .nav-container {
        flex-direction: column;
        gap: var(--space-sm);
    }
    
    .nav-menu {
        flex-wrap: wrap;
        justify-content: center;
        gap: var(--space-md);
    }
    
    .home-container {
        grid-template-columns: 1fr;
        gap: var(--space-xl);
    }
    
    .home-header {
        padding: var(--space-xl) var(--space-md);
    }
    
    .sidebar {
        padding: var(--space-lg);
    }
    
    .main-content {
        padding: var(--space-xl) var(--space-lg);
    }
    
    .footer-container {
        flex-direction: column;
        gap: var(--space-md);
        text-align: center;
    }
    
    .social-links {
        justify-content: center;
        gap: var(--space-sm);
    }
    
    .profile-name {
        font-size: 1.75rem;
    }
    
    .profile-title {
        font-size: 0.9rem;
    }
}

@media (max-width: 480px) {
    .sidebar {
        padding: var(--space-md);
    }
    
    .main-content {
        padding: var(--space-lg) var(--space-sm);
    }
    
    .interests-list li {
        padding: var(--space-sm) var(--space-md);
    }
    
    .publication {
        padding: var(--space-lg) var(--space-md);
    }
    
    .profile-name {
        font-size: 1.5rem;
    }
    
    .profile-title {
        font-size: 0.85rem;
    }
    
    .social-links a {
        width: 40px;
        height: 40px;
        font-size: 1rem;
    }
}

/* Modern Content Templates */
.content-list {
    display: grid;
    gap: var(--space-lg);
}

.content-item {
    background: rgba(59, 130, 246, 0.02);
    padding: var(--space-xl);
    border-radius: var(--radius-md);
    box-shadow: none;
    border: none;
    border-left: 3px solid transparent;
    transition: all 0.2s ease;
}

.content-item:hover {
    background: rgba(59, 130, 246, 0.05);
    border-left-color: var(--color-primary);
}

.content-item h3 {
    font-family: var(--font-heading);
    margin-bottom: var(--space-md);
    color: var(--color-text-primary);
    font-size: 1.5rem;
    font-weight: 600;
    letter-spacing: -0.025em;
}

.content-meta {
    color: var(--color-text-secondary);
    font-size: 0.9rem;
    margin-bottom: var(--space-md);
    font-family: var(--font-heading);
}

.content-summary {
    color: var(--color-text-secondary);
    margin: var(--space-md) 0;
    line-height: 1.6;
}

.read-more {
    display: inline-flex;
    align-items: center;
    gap: var(--space-xs);
    margin-top: var(--space-md);
    padding: var(--space-sm) var(--space-lg);
    background: var(--color-surface);
    color: var(--color-text-primary);
    text-decoration: none;
    border: 1px solid var(--color-border);
    border-radius: var(--radius-md);
    font-weight: 500;
    transition: all 0.2s ease;
}

.read-more:hover {
    color: var(--color-primary);
    border-color: var(--color-primary);
    background: rgba(59, 130, 246, 0.05);
}

/* Modern Single Page Content */
.single-content {
    max-width: 1400px;
    margin: 0 auto;
    background: var(--color-surface);
    padding: var(--space-2xl);
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-sm);
    border: none;
}

.content-header {
    margin-bottom: var(--space-2xl);
    padding-bottom: var(--space-xl);
}

.content-header h1 {
    font-family: var(--font-heading);
    color: var(--color-text-primary);
    font-size: clamp(2rem, 4vw, 3rem);
    font-weight: 700;
    margin-bottom: var(--space-md);
    line-height: 1.2;
    letter-spacing: -0.025em;
}

.content-subtitle {
    color: var(--color-text-secondary);
    font-size: 1.25rem;
    font-weight: 400;
    margin-bottom: var(--space-lg);
    line-height: 1.5;
}

.meta-item {
    margin-bottom: var(--space-sm);
    color: var(--color-text-secondary);
    font-size: 0.95rem;
}

.meta-item strong {
    color: var(--color-text-primary);
    font-family: var(--font-heading);
    font-weight: 600;
}

.content-links {
    display: flex;
    flex-wrap: wrap;
    gap: var(--space-sm);
    margin-top: var(--space-xl);
}

.link-button {
    display: inline-flex;
    align-items: center;
    gap: var(--space-sm);
    padding: var(--space-sm) var(--space-lg);
    background: var(--color-surface);
    color: var(--color-text-primary);
    text-decoration: none;
    border: 1px solid var(--color-border);
    border-radius: var(--radius-md);
    font-weight: 500;
    font-family: var(--font-heading);
    transition: all 0.2s ease;
}

.link-button:hover {
    color: var(--color-primary);
    border-color: var(--color-primary);
    background: rgba(59, 130, 246, 0.05);
}

/* Modern Content Elements */
.featured-image {
    margin: var(--space-xl) 0;
    text-align: center;
}

.featured-image img {
    max-width: 100%;
    height: auto;
    border-radius: var(--radius-xl);
    box-shadow: var(--shadow-lg);
    transition: transform 0.3s ease;
}

.featured-image img:hover {
    transform: scale(1.02);
}

.featured-image figcaption {
    margin-top: var(--space-md);
    color: var(--color-text-secondary);
    font-style: italic;
    font-size: 0.95rem;
}

.content-body {
    font-size: 1.125rem;
    line-height: 1.8;
    margin: var(--space-2xl) 0;
}

.content-body h2 {
    font-family: var(--font-heading);
    color: var(--color-text-primary);
    margin: var(--space-xl) 0 var(--space-md) 0;
    font-size: 1.75rem;
    font-weight: 700;
    letter-spacing: -0.025em;
}

.content-body h3 {
    font-family: var(--font-heading);
    color: var(--color-primary);
    margin: var(--space-lg) 0 var(--space-md) 0;
    font-size: 1.4rem;
    font-weight: 600;
}

.content-body p {
    margin-bottom: var(--space-md);
}

.content-body a:not(.link-button):not(.read-more),
.content-body a:visited:not(.link-button):not(.read-more),
.content-body a:link:not(.link-button):not(.read-more) {
    color: var(--color-text-primary) !important;
    text-decoration: none !important;
    border-bottom: 1px solid transparent;
    transition: all 0.2s ease;
    cursor: pointer;
}

.content-body a:not(.link-button):not(.read-more):hover,
.content-body a:visited:not(.link-button):not(.read-more):hover,
.content-body a:link:not(.link-button):not(.read-more):hover {
    color: var(--color-primary) !important;
    border-bottom-color: var(--color-primary) !important;
}

.main-content a:not(.link-button):not(.read-more),
.main-content a:visited:not(.link-button):not(.read-more),
.main-content a:link:not(.link-button):not(.read-more),
.section a:not(.link-button):not(.read-more),
.section a:visited:not(.link-button):not(.read-more),
.section a:link:not(.link-button):not(.read-more) {
    color: var(--color-text-primary) !important;
    text-decoration: none !important;
    border-bottom: 1px solid transparent;
    transition: all 0.2s ease;
    cursor: pointer;
}

.main-content a:not(.link-button):not(.read-more):hover,
.main-content a:visited:not(.link-button):not(.read-more):hover,
.main-content a:link:not(.link-button):not(.read-more):hover,
.section a:not(.link-button):not(.read-more):hover,
.section a:visited:not(.link-button):not(.read-more):hover,
.section a:link:not(.link-button):not(.read-more):hover {
    color: var(--color-primary) !important;
    border-bottom-color: var(--color-primary) !important;
}

/* Modern Abstract Section */
.abstract {
    background: linear-gradient(135deg, #f8fafc 0%, #f1f5f9 100%);
    padding: var(--space-xl);
    border-radius: var(--radius-md);
    border: none;
    border-left: 3px solid var(--color-primary);
    margin: var(--space-2xl) 0;
}

.abstract h3 {
    font-family: var(--font-heading);
    color: var(--color-text-primary);
    margin-bottom: var(--space-md);
    font-size: 1.4rem;
    font-weight: 600;
}

/* Content Navigation */
.content-nav {
    display: flex;
    justify-content: space-between;
    margin-top: var(--space-2xl);
    padding-top: var(--space-xl);
    border-top: 1px solid var(--color-border-light);
}

.nav-prev,
.nav-next,
.nav-prev:visited,
.nav-next:visited,
.nav-prev:link,
.nav-next:link {
    display: flex;
    align-items: center;
    gap: var(--space-sm);
    color: var(--color-text-primary);
    text-decoration: none;
    font-weight: 500;
    font-family: var(--font-heading);
    max-width: 45%;
    border-bottom: 1px solid transparent;
    transition: all 0.2s ease;
}

.nav-prev:hover,
.nav-next:hover,
.nav-prev:visited:hover,
.nav-next:visited:hover,
.nav-prev:link:hover,
.nav-next:link:hover {
    color: var(--color-primary);
    border-bottom-color: var(--color-primary);
}

/* Content Description */
.content-description {
    background: linear-gradient(135deg, #f8fafc 0%, #f1f5f9 100%);
    padding: var(--space-xl);
    border-radius: var(--radius-md);
    margin-bottom: var(--space-2xl);
    border: none;
    border-left: 3px solid var(--color-primary);
}

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

.pagination a,
.pagination span {
    padding: var(--space-sm) var(--space-md);
    border: 1px solid var(--color-border);
    text-decoration: none;
    color: var(--color-text-secondary);
    border-radius: var(--radius-md);
    font-family: var(--font-heading);
    font-weight: 500;
    transition: all 0.2s ease;
    min-width: 44px;
    text-align: center;
}

.pagination a:hover {
    background: var(--color-primary);
    color: var(--color-text-inverse);
    border-color: var(--color-primary);
    transform: translateY(-1px);
}

.pagination .active {
    background: var(--color-primary);
    color: var(--color-text-inverse);
    border-color: var(--color-primary);
}

/* Modern Accessibility & Enhancement */
.profile-placeholder {
    text-align: center;
    padding: var(--space-lg) 0;
    margin-bottom: var(--space-lg);
    color: var(--color-text-secondary);
}

/* Focus States for Accessibility */
.nav-link:focus,
.link-button:focus,
.read-more:focus,
.social-links a:focus {
    outline: 2px solid var(--color-accent);
    outline-offset: 2px;
    border-radius: var(--radius-md);
}

/* Modern Loading States */
.content-item,
.publication,
.education-item {
    will-change: transform;
}

/* Print Styles */
@media print {
    .site-header,
    .site-footer,
    .social-links,
    .content-links {
        display: none;
    }
    
    .home-container {
        grid-template-columns: 1fr;
    }
    
    .sidebar {
        display: none;
    }
    
    .main-content {
        box-shadow: none;
        border: none;
    }
}

/* High Contrast Support */
@media (prefers-contrast: high) {
    :root {
        --color-text-primary: #000000;
        --color-text-secondary: #333333;
        --color-border: #666666;
    }
    
    .nav-link:hover {
        background-color: rgba(0, 0, 0, 0.1);
    }
    
    .content-item {
        border: 2px solid var(--color-border);
    }
}

/* 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;
    }
}

/* Dark Mode Support (Optional) */
@media (prefers-color-scheme: dark) {
    :root {
        --color-background: #0f172a;
        --color-surface: #1e293b;
        --color-surface-elevated: #334155;
        --color-border-light: #475569;
        --color-border: #64748b;
        --color-text-primary: #f8fafc;
        --color-text-secondary: #cbd5e1;
        --color-text-tertiary: #94a3b8;
        --color-text-inverse: #0f172a;
    }
    
    .site-header {
        background: rgba(15, 23, 42, 0.95);
        border-bottom-color: var(--color-border-light);
    }
    
    .research-highlight,
    .teaching-highlight {
        background: var(--color-surface);
        border-color: #334155;
    }
    
    .research-highlight h3 {
        color: #fbbf24;
    }
    
    .research-highlight p {
        color: #e2e8f0;
    }
}