/* Main CSS File - Dark Theme */

/* CSS Variables for Dark Theme */
:root {
    --bg-color: #0d1117;
    --bg-secondary: #161b22;
    --bg-tertiary: #21262d;
    --text-primary: #f0f6fc;
    --text-secondary: #7d8590;
    --text-muted: #6e7681;
    --accent-color: #58a6ff;
    --accent-hover: #388bfd;
    --border-color: #30363d;
    --border-muted: #21262d;
    --success-color: #238636;
    --warning-color: #d29922;
    --error-color: #f85149;
    
    /* Typography */
    --font-family-sans: -apple-system, BlinkMacSystemFont, 'Segoe UI', 'Noto Sans', Helvetica, Arial, sans-serif;
    --font-family-mono: 'SFMono-Regular', Consolas, 'Liberation Mono', Menlo, monospace;
    
    /* Spacing */
    --spacing-xs: 0.25rem;
    --spacing-sm: 0.5rem;
    --spacing-md: 1rem;
    --spacing-lg: 1.5rem;
    --spacing-xl: 2rem;
    --spacing-xxl: 3rem;
    
    /* Border radius */
    --border-radius: 6px;
    --border-radius-lg: 12px;
    
    /* Shadows */
    --shadow-sm: 0 1px 0 rgba(255, 255, 255, 0.03);
    --shadow-md: 0 8px 24px rgba(0, 0, 0, 0.4);
    --shadow-lg: 0 16px 32px rgba(0, 0, 0, 0.5);
    
    /* Transitions */
    --transition-fast: 0.1s ease-in-out;
    --transition-normal: 0.2s ease-in-out;
    --transition-slow: 0.3s ease-in-out;
}

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

html {
    scroll-behavior: smooth;
}

body {
    font-family: var(--font-family-sans);
    line-height: 1.6;
    color: var(--text-primary);
    background-color: var(--bg-color);
    min-height: 100vh;
    font-size: 16px;
}

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

@media (max-width: 768px) {
    .container {
        padding: 0 var(--spacing-md);
    }
}

/* Typography */
h1, h2, h3, h4, h5, h6 {
    color: var(--text-primary);
    font-weight: 600;
    line-height: 1.25;
}

h1 {
    font-size: 2.5rem;
    margin-bottom: var(--spacing-lg);
}

h2 {
    font-size: 2rem;
    margin-bottom: var(--spacing-md);
    border-bottom: 1px solid var(--border-color);
    padding-bottom: var(--spacing-sm);
}

h3 {
    font-size: 1.5rem;
    margin-bottom: var(--spacing-sm);
}

p {
    margin-bottom: var(--spacing-md);
    color: var(--text-secondary);
    line-height: 1.7;
}

/* Links */
a {
    color: var(--accent-color);
    text-decoration: none;
    transition: color var(--transition-fast);
}

a:hover {
    color: var(--accent-hover);
    text-decoration: underline;
}

/* Main Content */
.main-content {
    padding-top: 80px; /* Account for fixed navbar */
    min-height: 100vh;
}

/* Profile Section */
.profile-section {
    padding: var(--spacing-xxl) 0;
    background-color: var(--bg-color);
}

.profile-content {
    position: relative;
}

.profile-image {
    float: right;
    margin-left: var(--spacing-xl);
    margin-bottom: var(--spacing-lg);
    width: 280px;
    flex-shrink: 0;
}

.profile-content h1 {
    font-size: 3rem;
    font-weight: 700;
    margin-bottom: var(--spacing-md);
    color: var(--text-primary);
    clear: none;
}

.profile-content .bio p {
    text-align: justify;
    line-height: 1.7;
    margin-bottom: var(--spacing-lg);
}

@media (max-width: 968px) {
    .profile-image {
        float: none;
        margin: 0 auto var(--spacing-xl) auto;
        display: block;
        width: 240px;
    }
    
    .profile-content {
        text-align: center;
    }
    
    .profile-content .bio p {
        text-align: left;
    }
    
    .profile-content h1 {
        font-size: 2.5rem;
        text-align: center;
    }
}

.profile-location {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    margin-bottom: var(--spacing-xl);
    color: var(--text-secondary);
    font-size: 1.1rem;
}

@media (max-width: 968px) {
    .profile-location {
        justify-content: center;
    }
}

.profile-location i {
    color: var(--accent-color);
}

.bio p {
    font-size: 1.1rem;
    line-height: 1.8;
    margin-bottom: var(--spacing-lg);
}

.profile-image {
    display: flex;
    justify-content: center;
    align-items: center;
}

.profile-pic {
    width: 300px;
    height: 300px;
    border-radius: 50%;
    object-fit: cover;
    border: 4px solid var(--border-color);
    box-shadow: var(--shadow-lg);
    transition: transform var(--transition-normal);
}

.profile-pic:hover {
    transform: scale(1.05);
}

@media (max-width: 768px) {
    .profile-pic {
        width: 250px;
        height: 250px;
    }
}

/* News Section */
.news-section {
    padding: var(--spacing-xxl) 0;
    background-color: var(--bg-secondary);
}

.news-list {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-lg);
}

.news-item {
    background-color: var(--bg-tertiary);
    border-radius: var(--border-radius);
    border: 1px solid var(--border-color);
    transition: all var(--transition-normal);
    overflow: hidden;
}

.news-item:hover {
    border-color: var(--accent-color);
    box-shadow: var(--shadow-md);
}

.news-content {
    padding: var(--spacing-lg);
    color: var(--text-secondary);
    line-height: 1.7;
}

/* Publications Section */
.publications-section {
    padding: var(--spacing-xxl) 0;
    background-color: var(--bg-color);
}

.publications-list {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-xxl);
}

.publication-item {
    display: grid;
    grid-template-columns: 200px 1fr;
    gap: var(--spacing-xl);
    padding: var(--spacing-xl);
    background-color: var(--bg-secondary);
    border-radius: var(--border-radius-lg);
    border: 1px solid var(--border-color);
    transition: all var(--transition-normal);
}

.publication-item:hover {
    border-color: var(--accent-color);
    box-shadow: var(--shadow-md);
}

@media (max-width: 768px) {
    .publication-item {
        grid-template-columns: 1fr;
        gap: var(--spacing-lg);
        padding: var(--spacing-lg);
    }
}

.publication-image {
    display: flex;
    justify-content: center;
    align-items: flex-start;
}

.publication-image img {
    width: 100%;
    height: auto;
    max-width: 200px;
    border-radius: var(--border-radius);
    border: 1px solid var(--border-color);
}

.publication-content h3 {
    font-size: 1.3rem;
    color: var(--text-primary);
    margin-bottom: var(--spacing-sm);
    line-height: 1.4;
}

.publication-authors {
    margin-bottom: var(--spacing-sm);
    color: var(--text-secondary);
    line-height: 1.5;
}

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

.publication-venue {
    margin-bottom: var(--spacing-md);
    color: var(--text-muted);
    font-style: italic;
}

.publication-links {
    display: flex;
    gap: var(--spacing-md);
    margin-bottom: var(--spacing-lg);
    flex-wrap: wrap;
}

.pub-link {
    padding: var(--spacing-xs) var(--spacing-sm);
    background-color: var(--bg-tertiary);
    border: 1px solid var(--border-color);
    border-radius: var(--border-radius);
    color: var(--accent-color);
    font-size: 0.85rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.5px;
    transition: all var(--transition-fast);
}

.pub-link:hover {
    background-color: var(--accent-color);
    color: var(--bg-color);
    text-decoration: none;
}

.publication-abstract p {
    color: var(--text-secondary);
    line-height: 1.7;
}

/* Footer */
.footer {
    background-color: var(--bg-secondary);
    padding: var(--spacing-xxl) 0;
    border-top: 1px solid var(--border-color);
    text-align: center;
}

.social-links {
    display: flex;
    justify-content: center;
    gap: var(--spacing-lg);
    margin-bottom: var(--spacing-xl);
}

.social-links a {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 50px;
    height: 50px;
    background-color: var(--bg-tertiary);
    border: 1px solid var(--border-color);
    border-radius: 50%;
    color: var(--text-secondary);
    font-size: 1.25rem;
    transition: all var(--transition-normal);
}

.social-links a:hover {
    background-color: var(--accent-color);
    border-color: var(--accent-color);
    color: var(--bg-color);
    transform: translateY(-2px);
    text-decoration: none;
}

.footer-text p {
    color: var(--text-muted);
    margin-bottom: var(--spacing-sm);
}

/* Responsive Design */
@media (max-width: 480px) {
    .social-links {
        gap: var(--spacing-md);
    }
    
    .social-links a {
        width: 40px;
        height: 40px;
        font-size: 1rem;
    }
    
    .publication-links {
        gap: var(--spacing-sm);
    }
    
    .pub-link {
        font-size: 0.8rem;
    }
}

/* Scrollbar Styling */
::-webkit-scrollbar {
    width: 8px;
}

::-webkit-scrollbar-track {
    background: var(--bg-secondary);
}

::-webkit-scrollbar-thumb {
    background: var(--border-color);
    border-radius: 4px;
}

::-webkit-scrollbar-thumb:hover {
    background: var(--text-muted);
}

/* Gallery Grid */
.gallery-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: var(--spacing-lg);
    margin-bottom: var(--spacing-xxl);
}

.gallery-item {
    position: relative;
    aspect-ratio: 4/3;
    border-radius: var(--border-radius-lg);
    overflow: hidden;
    cursor: pointer;
    transition: all var(--transition-normal);
    border: 1px solid var(--border-color);
}

.gallery-item:hover {
    transform: translateY(-5px);
    box-shadow: var(--shadow-lg);
    border-color: var(--accent-color);
}

.gallery-item img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: transform var(--transition-normal);
}

.gallery-item:hover img {
    transform: scale(1.05);
}

.gallery-overlay {
    position: absolute;
    bottom: 0;
    left: 0;
    right: 0;
    background: linear-gradient(transparent, rgba(0, 0, 0, 0.9));
    color: white;
    padding: var(--spacing-xl) var(--spacing-lg) var(--spacing-lg);
    transform: translateY(100%);
    transition: transform var(--transition-normal);
}

.gallery-item:hover .gallery-overlay {
    transform: translateY(0);
}

.gallery-overlay h3 {
    color: white;
    font-size: 1.2rem;
    margin-bottom: var(--spacing-sm);
}

.gallery-overlay p {
    color: rgba(255, 255, 255, 0.8);
    font-size: 0.9rem;
    margin-bottom: 0;
}

/* News List Page */
.news-list-page {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-xl);
    margin-bottom: var(--spacing-xxl);
}

.news-item-page {
    background-color: var(--bg-secondary);
    border: 1px solid var(--border-color);
    border-radius: var(--border-radius-lg);
    padding: var(--spacing-xl);
    transition: all var(--transition-normal);
    position: relative;
}

.news-item-page::before {
    content: '';
    position: absolute;
    left: 0;
    top: 0;
    bottom: 0;
    width: 4px;
    background: linear-gradient(to bottom, var(--accent-color), var(--accent-hover));
    border-radius: 0 var(--border-radius) var(--border-radius) 0;
}

.news-item-page:hover {
    border-color: var(--accent-color);
    box-shadow: var(--shadow-md);
    transform: translateY(-2px);
}

.news-date {
    color: var(--text-muted);
    font-size: 0.9rem;
    font-weight: 600;
    margin-bottom: var(--spacing-sm);
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

.news-item-page h3 {
    color: var(--text-primary);
    font-size: 1.4rem;
    margin-bottom: var(--spacing-md);
    line-height: 1.3;
}

.news-item-page p {
    color: var(--text-secondary);
    line-height: 1.7;
    margin-bottom: var(--spacing-lg);
}

.news-tags {
    display: flex;
    flex-wrap: wrap;
    gap: var(--spacing-sm);
}

@media (max-width: 768px) {
    .gallery-grid {
        grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
        gap: var(--spacing-md);
    }
    
    .gallery-overlay {
        padding: var(--spacing-lg);
    }
    
    .news-item-page {
        padding: var(--spacing-lg);
    }
    
    .news-item-page h3 {
        font-size: 1.2rem;
    }
}

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

/* Certifications Grid */
.certifications-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(400px, 1fr));
    gap: var(--spacing-xl);
    margin-bottom: var(--spacing-xxl);
}

.certification-card {
    background-color: var(--bg-secondary);
    border: 1px solid var(--border-color);
    border-radius: var(--border-radius-lg);
    padding: var(--spacing-xl);
    transition: all var(--transition-normal);
    text-align: center;
    position: relative;
    overflow: hidden;
}

.certification-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 4px;
    background: linear-gradient(90deg, var(--accent-color), var(--accent-hover));
}

.certification-card:hover {
    border-color: var(--accent-color);
    box-shadow: var(--shadow-lg);
    transform: translateY(-5px);
}

.cert-icon {
    width: 80px;
    height: 80px;
    margin: 0 auto var(--spacing-lg);
    background: linear-gradient(135deg, var(--accent-color), var(--accent-hover));
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 2.5rem;
    color: white;
}

.certification-card h3 {
    color: var(--text-primary);
    font-size: 1.3rem;
    margin-bottom: var(--spacing-sm);
    line-height: 1.3;
}

.cert-issuer {
    color: var(--accent-color);
    font-weight: 600;
    font-size: 1.1rem;
    margin-bottom: var(--spacing-sm);
}

.cert-date {
    color: var(--text-muted);
    font-size: 0.9rem;
    margin-bottom: var(--spacing-md);
    font-style: italic;
}

.cert-description {
    color: var(--text-secondary);
    line-height: 1.6;
    margin-bottom: var(--spacing-lg);
    text-align: left;
}

.cert-skills {
    display: flex;
    flex-wrap: wrap;
    gap: var(--spacing-sm);
    justify-content: center;
    margin-bottom: var(--spacing-lg);
}

.skill-tag {
    padding: var(--spacing-xs) var(--spacing-sm);
    background-color: var(--bg-tertiary);
    color: var(--text-secondary);
    border: 1px solid var(--border-color);
    border-radius: calc(var(--border-radius) * 2);
    font-size: 0.8rem;
    font-weight: 500;
}

.cert-link {
    display: inline-flex;
    align-items: center;
    gap: var(--spacing-xs);
    padding: var(--spacing-sm) var(--spacing-lg);
    background-color: var(--accent-color);
    color: white;
    text-decoration: none;
    border-radius: var(--border-radius);
    font-weight: 600;
    transition: all var(--transition-fast);
}

.cert-link:hover {
    background-color: var(--accent-hover);
    text-decoration: none;
    color: white;
    transform: translateY(-1px);
}

/* Skills Overview */
.skills-overview {
    margin-bottom: var(--spacing-xxl);
}

.skills-overview h2 {
    font-size: 2rem;
    margin-bottom: var(--spacing-xl);
    color: var(--text-primary);
    text-align: center;
    border-bottom: 1px solid var(--border-color);
    padding-bottom: var(--spacing-sm);
}

.skills-categories {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: var(--spacing-lg);
}

.skill-category {
    background-color: var(--bg-secondary);
    border: 1px solid var(--border-color);
    border-radius: var(--border-radius-lg);
    padding: var(--spacing-xl);
    transition: all var(--transition-normal);
}

.skill-category:hover {
    border-color: var(--accent-color);
    box-shadow: var(--shadow-md);
}

.skill-category h3 {
    color: var(--text-primary);
    font-size: 1.2rem;
    margin-bottom: var(--spacing-lg);
    text-align: center;
    position: relative;
    padding-bottom: var(--spacing-sm);
}

.skill-category h3::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 50%;
    transform: translateX(-50%);
    width: 30px;
    height: 2px;
    background-color: var(--accent-color);
}

.skill-list {
    display: flex;
    flex-wrap: wrap;
    gap: var(--spacing-sm);
    justify-content: center;
}

.skill-item {
    padding: var(--spacing-sm) var(--spacing-md);
    background-color: var(--bg-tertiary);
    color: var(--text-secondary);
    border: 1px solid var(--border-color);
    border-radius: var(--border-radius);
    font-size: 0.9rem;
    transition: all var(--transition-fast);
}

.skill-item:hover {
    background-color: var(--accent-color);
    color: white;
    border-color: var(--accent-color);
}

@media (max-width: 768px) {
    .certifications-grid {
        grid-template-columns: 1fr;
    }
    
    .skills-categories {
        grid-template-columns: 1fr;
    }
    
    .certification-card {
        padding: var(--spacing-lg);
    }
    
    .cert-icon {
        width: 60px;
        height: 60px;
        font-size: 2rem;
    }
}

/* Awards Timeline */
.awards-timeline {
    position: relative;
    margin-bottom: var(--spacing-xxl);
}

.awards-timeline::before {
    content: '';
    position: absolute;
    left: 30px;
    top: 0;
    bottom: 0;
    width: 2px;
    background: linear-gradient(to bottom, var(--accent-color), var(--accent-hover));
}

.timeline-item {
    display: flex;
    margin-bottom: var(--spacing-xl);
    position: relative;
}

.timeline-year {
    flex-shrink: 0;
    width: 80px;
    font-size: 1.1rem;
    font-weight: 700;
    color: var(--accent-color);
    position: relative;
}

.timeline-year::after {
    content: '';
    position: absolute;
    right: -16px;
    top: 50%;
    transform: translateY(-50%);
    width: 12px;
    height: 12px;
    background-color: var(--accent-color);
    border: 3px solid var(--bg-color);
    border-radius: 50%;
    box-shadow: 0 0 0 3px var(--accent-color);
}

.timeline-content {
    flex: 1;
    background-color: var(--bg-secondary);
    border: 1px solid var(--border-color);
    border-radius: var(--border-radius-lg);
    padding: var(--spacing-xl);
    margin-left: var(--spacing-lg);
    transition: all var(--transition-normal);
    position: relative;
}

.timeline-content::before {
    content: '';
    position: absolute;
    left: -8px;
    top: 20px;
    border: 8px solid transparent;
    border-right-color: var(--border-color);
}

.timeline-content::after {
    content: '';
    position: absolute;
    left: -6px;
    top: 22px;
    border: 6px solid transparent;
    border-right-color: var(--bg-secondary);
}

.timeline-content:hover {
    border-color: var(--accent-color);
    box-shadow: var(--shadow-md);
    transform: translateY(-2px);
}

.timeline-content h3 {
    color: var(--text-primary);
    font-size: 1.4rem;
    margin-bottom: var(--spacing-sm);
}

.award-organization {
    color: var(--accent-color);
    font-weight: 600;
    margin-bottom: var(--spacing-md);
    font-size: 1.1rem;
}

.award-description {
    color: var(--text-secondary);
    line-height: 1.6;
    margin-bottom: var(--spacing-lg);
}

.award-badge {
    display: inline-flex;
    align-items: center;
    gap: var(--spacing-sm);
    padding: var(--spacing-sm) var(--spacing-md);
    background: linear-gradient(135deg, var(--accent-color), var(--accent-hover));
    color: var(--bg-color);
    border-radius: calc(var(--border-radius) * 2);
    font-weight: 600;
    font-size: 0.9rem;
}

/* Awards Statistics */
.awards-stats {
    margin-bottom: var(--spacing-xxl);
}

.awards-stats h2 {
    font-size: 2rem;
    margin-bottom: var(--spacing-xl);
    color: var(--text-primary);
    text-align: center;
}

.stats-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: var(--spacing-lg);
}

.stat-card {
    background-color: var(--bg-secondary);
    border: 1px solid var(--border-color);
    border-radius: var(--border-radius-lg);
    padding: var(--spacing-xl);
    text-align: center;
    transition: all var(--transition-normal);
    position: relative;
    overflow: hidden;
}

.stat-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 4px;
    background: linear-gradient(90deg, var(--accent-color), var(--accent-hover));
}

.stat-card:hover {
    border-color: var(--accent-color);
    box-shadow: var(--shadow-lg);
    transform: translateY(-5px);
}

.stat-number {
    font-size: 3rem;
    font-weight: 700;
    color: var(--accent-color);
    margin-bottom: var(--spacing-sm);
}

.stat-label {
    color: var(--text-primary);
    font-weight: 600;
    margin-bottom: var(--spacing-md);
}

.stat-icon {
    color: var(--text-secondary);
    font-size: 1.5rem;
}

@media (max-width: 768px) {
    .awards-timeline::before {
        left: 15px;
    }
    
    .timeline-year {
        width: 60px;
        font-size: 1rem;
    }
    
    .timeline-year::after {
        right: -12px;
        width: 8px;
        height: 8px;
    }
    
    .timeline-content {
        margin-left: var(--spacing-md);
        padding: var(--spacing-lg);
    }
    
    .stats-grid {
        grid-template-columns: repeat(2, 1fr);
        gap: var(--spacing-md);
    }
    
    .stat-card {
        padding: var(--spacing-lg);
    }
    
    .stat-number {
        font-size: 2.5rem;
    }
}

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

/* Projects Grid */
.projects-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(350px, 1fr));
    gap: var(--spacing-xl);
    margin-bottom: var(--spacing-xxl);
}

.project-card {
    background-color: var(--bg-secondary);
    border: 1px solid var(--border-color);
    border-radius: var(--border-radius-lg);
    overflow: hidden;
    transition: all var(--transition-normal);
    height: fit-content;
}

.project-card:hover {
    border-color: var(--accent-color);
    box-shadow: var(--shadow-lg);
    transform: translateY(-5px);
}

.project-image {
    position: relative;
    height: 200px;
    overflow: hidden;
}

.project-image img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: transform var(--transition-normal);
}

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

.project-overlay {
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: rgba(0, 0, 0, 0.8);
    display: flex;
    align-items: center;
    justify-content: center;
    opacity: 0;
    transition: opacity var(--transition-normal);
}

.project-card:hover .project-overlay {
    opacity: 1;
}

.project-links {
    display: flex;
    gap: var(--spacing-md);
}

.project-link {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 50px;
    height: 50px;
    background-color: rgba(255, 255, 255, 0.1);
    border: 2px solid rgba(255, 255, 255, 0.3);
    border-radius: 50%;
    color: white;
    font-size: 1.2rem;
    transition: all var(--transition-fast);
    backdrop-filter: blur(10px);
}

.project-link:hover {
    background-color: var(--accent-color);
    border-color: var(--accent-color);
    transform: scale(1.1);
    text-decoration: none;
}

.project-content {
    padding: var(--spacing-xl);
}

.project-content h3 {
    color: var(--text-primary);
    font-size: 1.4rem;
    margin-bottom: var(--spacing-md);
    line-height: 1.3;
}

.project-tags {
    display: flex;
    flex-wrap: wrap;
    gap: var(--spacing-sm);
    margin-bottom: var(--spacing-md);
}

.project-content p {
    color: var(--text-secondary);
    line-height: 1.6;
    margin-bottom: var(--spacing-lg);
}

.project-tech {
    display: flex;
    flex-wrap: wrap;
    gap: var(--spacing-sm);
}

.tech-item {
    padding: var(--spacing-xs) var(--spacing-sm);
    background-color: var(--bg-tertiary);
    color: var(--text-secondary);
    border: 1px solid var(--border-color);
    border-radius: var(--border-radius);
    font-size: 0.85rem;
    font-family: var(--font-family-mono);
}

/* Open Source Contributions */
.open-source-section {
    margin-bottom: var(--spacing-xxl);
}

.open-source-section h2 {
    font-size: 2rem;
    margin-bottom: var(--spacing-xl);
    color: var(--text-primary);
    border-bottom: 1px solid var(--border-color);
    padding-bottom: var(--spacing-sm);
}

.contributions-grid {
    display: grid;
    gap: var(--spacing-lg);
}

.contribution-item {
    background-color: var(--bg-secondary);
    border: 1px solid var(--border-color);
    border-radius: var(--border-radius-lg);
    padding: var(--spacing-xl);
    transition: all var(--transition-normal);
}

.contribution-item:hover {
    border-color: var(--accent-color);
    box-shadow: var(--shadow-md);
}

.contribution-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    margin-bottom: var(--spacing-md);
    flex-wrap: wrap;
    gap: var(--spacing-sm);
}

.contribution-header h3 {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    margin: 0;
    color: var(--text-primary);
}

.contribution-header h3 i {
    color: var(--text-secondary);
}

.contribution-type {
    padding: var(--spacing-xs) var(--spacing-sm);
    background-color: var(--bg-tertiary);
    color: var(--accent-color);
    border: 1px solid var(--border-color);
    border-radius: var(--border-radius);
    font-size: 0.85rem;
    font-weight: 500;
}

.contribution-stats {
    display: flex;
    gap: var(--spacing-lg);
    margin-top: var(--spacing-md);
}

.stat {
    display: flex;
    align-items: center;
    gap: var(--spacing-xs);
    color: var(--text-secondary);
    font-size: 0.9rem;
}

.stat i {
    color: var(--accent-color);
}

@media (max-width: 768px) {
    .projects-grid {
        grid-template-columns: 1fr;
    }
    
    .contribution-header {
        flex-direction: column;
        align-items: flex-start;
    }
    
    .contribution-stats {
        flex-direction: column;
        gap: var(--spacing-sm);
    }
}

/* Page Header */
.page-header {
    padding: var(--spacing-xxl) 0;
    text-align: center;
    border-bottom: 1px solid var(--border-color);
    margin-bottom: var(--spacing-xxl);
}

.page-header h1 {
    font-size: 3rem;
    font-weight: 700;
    margin-bottom: var(--spacing-md);
    color: var(--text-primary);
}

.page-header p {
    font-size: 1.2rem;
    color: var(--text-secondary);
    margin-bottom: 0;
}

@media (max-width: 768px) {
    .page-header h1 {
        font-size: 2.5rem;
    }
    
    .page-header p {
        font-size: 1.1rem;
    }
}

/* Publications Year Section */
.publications-year {
    margin-bottom: var(--spacing-xxl);
}

.publications-year h2 {
    font-size: 2.5rem;
    font-weight: 700;
    color: var(--accent-color);
    margin-bottom: var(--spacing-xl);
    padding-bottom: var(--spacing-md);
    border-bottom: 2px solid var(--accent-color);
}

/* Selection */
::selection {
    background: var(--accent-color);
    color: var(--bg-color);
}

::-moz-selection {
    background: var(--accent-color);
    color: var(--bg-color);
}