:root {
    /* Light mode colors */
    --bg-primary: #ffffff;
    --bg-secondary: #f8fafc;
    --bg-accent: #f1f5f9;
    --text-primary: #1a202c;
    --text-secondary: #4a5568;
    --text-accent: #718096;
    --border-color: #e2e8f0;
    --card-bg: #ffffff;
    --nav-bg: rgba(255, 255, 255, 0.9);
    --accent-color: #3182ce;
    --accent-hover: #2c5aa0;
    --gradient-primary: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    --shadow-sm: 0 1px 3px 0 rgba(0, 0, 0, 0.1), 0 1px 2px 0 rgba(0, 0, 0, 0.06);
    --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);
}

[data-theme="dark"] {
    /* Dark mode colors - GitHub inspired */
    --bg-primary: #0d1117;
    --bg-secondary: #161b22;
    --bg-accent: #21262d;
    --text-primary: #f0f6fc;
    --text-secondary: #8b949e;
    --text-accent: #6e7681;
    --border-color: #30363d;
    --card-bg: #161b22;
    --nav-bg: rgba(13, 17, 23, 0.9);
    --accent-color: #58a6ff;
    --accent-hover: #1f6feb;
    --gradient-primary: linear-gradient(135deg, #58a6ff 0%, #1f6feb 100%);
    --shadow-sm: 0 1px 3px 0 rgba(0, 0, 0, 0.3), 0 1px 2px 0 rgba(0, 0, 0, 0.2);
    --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.3), 0 2px 4px -1px rgba(0, 0, 0, 0.2);
    --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.3), 0 4px 6px -2px rgba(0, 0, 0, 0.2);
}

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

body {
    font-family: 'Inter', sans-serif;
    background-color: var(--bg-primary);
    color: var(--text-primary);
    line-height: 1.6;
    transition: background-color 0.3s ease, color 0.3s ease;
}

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 2rem;
}

/* Navigation */
.navbar {
    position: fixed;
    top: 0;
    width: 100%;
    background: var(--nav-bg);
    backdrop-filter: blur(10px);
    border-bottom: 1px solid var(--border-color);
    z-index: 1000;
    transition: all 0.3s ease;
}

.nav-container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 1rem 2rem;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.nav-brand h2 {
    background: var(--gradient-primary);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    font-weight: 700;
    margin: 0;
}

.nav-profile-container {
    display: flex;
    align-items: center;
    gap: 0.75rem;
}

.nav-profile-img {
    width: 40px;
    height: 40px;
    border-radius: 50%;
    object-fit: cover;
    border: 2px solid var(--accent-color);
    opacity: 0;
    transform: scale(0.8);
    transition: all 0.3s ease;
}

.nav-profile-img.visible {
    opacity: 1;
    transform: scale(1);
}

.nav-links {
    display: flex;
    align-items: center;
    gap: 2rem;
}

.nav-links a {
    color: var(--text-secondary);
    text-decoration: none;
    font-weight: 500;
    transition: color 0.3s ease;
    position: relative;
}

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

.nav-links a::after {
    content: '';
    position: absolute;
    bottom: -5px;
    left: 0;
    width: 0;
    height: 2px;
    background: var(--accent-color);
    transition: width 0.3s ease;
}

.nav-links a:hover::after {
    width: 100%;
}

.theme-toggle {
    background: none;
    border: 2px solid var(--border-color);
    color: var(--text-secondary);
    padding: 0.5rem;
    border-radius: 8px;
    cursor: pointer;
    transition: all 0.3s ease;
}

.theme-toggle:hover {
    color: var(--accent-color);
    border-color: var(--accent-color);
}

/* Hero Section */
.hero {
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 6rem 2rem 2rem;
    background: var(--bg-primary);
}

.hero-content {
    text-align: center;
    max-width: 800px;
}

.hero-profile {
    margin-bottom: 2rem;
    display: flex;
    justify-content: center;
}

.profile-image {
    width: 200px;
    height: 200px;
    border-radius: 50%;
    object-fit: cover;
    border: 4px solid var(--accent-color);
    box-shadow: var(--shadow-lg);
    transition: all 0.3s ease;
}

.profile-image:hover {
    transform: scale(1.05);
    box-shadow: 0 20px 40px rgba(0, 0, 0, 0.2);
}

.hero-title {
    font-size: clamp(2.5rem, 5vw, 4rem);
    font-weight: 700;
    margin-bottom: 1rem;
    color: var(--text-primary);
}

.highlight {
    background: var(--gradient-primary);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.highlight-text {
    color: var(--accent-color);
    font-weight: 600;
    background: var(--gradient-primary);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.hero-subtitle {
    font-size: 1.25rem;
    color: var(--text-secondary);
    margin-bottom: 3rem;
    font-weight: 400;
}

.hero-stats {
    display: flex;
    justify-content: center;
    gap: 3rem;
    margin-bottom: 3rem;
}

.stat-item {
    text-align: center;
}

.stat-number {
    display: inline;
    font-size: 2rem;
    font-weight: 700;
    color: var(--accent-color);
    margin-right: 0.5rem;
}

.stat-label {
    font-size: 0.875rem;
    color: var(--text-accent);
    text-transform: uppercase;
    letter-spacing: 0.05em;
    line-height: 1.4;
    display: inline;
}

.hero-links {
    display: flex;
    justify-content: center;
    gap: 1rem;
    margin-bottom: 2rem;
    flex-wrap: wrap;
}

.btn {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    padding: 0.875rem 1.5rem;
    border-radius: 8px;
    text-decoration: none;
    font-weight: 500;
    transition: all 0.3s ease;
    border: 2px solid transparent;
}

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

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

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

.btn-secondary:hover {
    color: var(--accent-color);
    border-color: var(--accent-color);
    background: var(--bg-accent);
}

/* CodeChef Icon Styling */
.codechef-icon {
    width: 40px;
    height: 40px;
    margin-right: 0.5rem;
}

.coding-profiles {
    display: flex;
    justify-content: center;
    gap: 2rem;
    margin-top: 2rem;
}

.coding-link {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    padding: 0.75rem 1.25rem;
    background: var(--card-bg);
    border: 1px solid var(--border-color);
    border-radius: 8px;
    text-decoration: none;
    color: var(--text-secondary);
    transition: all 0.3s ease;
    box-shadow: var(--shadow-sm);
}

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

.coding-link img {
    width: 20px;
    height: 20px;
}

/* Sections */
.section-title {
    font-size: 2.5rem;
    font-weight: 700;
    text-align: center;
    margin-bottom: 3rem;
    color: var(--text-primary);
    position: relative;
}

.section-title::after {
    content: '';
    position: absolute;
    bottom: -10px;
    left: 50%;
    transform: translateX(-50%);
    width: 60px;
    height: 4px;
    background: var(--gradient-primary);
    border-radius: 2px;
}

section {
    padding: 5rem 0;
}

section:nth-child(even) {
    background: var(--bg-secondary);
}

/* About Section */
.about-content {
    max-width: 1000px;
    margin: 0 auto;
}

.about-text {
    font-size: 1.125rem;
    color: var(--text-secondary);
    margin-bottom: 3rem;
    line-height: 1.8;
}

.education {
    margin-bottom: 3rem;
}

.education h3 {
    font-size: 1.5rem;
    font-weight: 600;
    color: var(--text-primary);
    margin-bottom: 1.5rem;
}

.education-item {
    background: var(--card-bg);
    padding: 1.5rem;
    border-radius: 12px;
    border: 1px solid var(--border-color);
    box-shadow: var(--shadow-sm);
}

.education-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 0.5rem;
}

.education-header h4 {
    color: var(--accent-color);
    font-weight: 600;
}

.duration {
    color: var(--text-accent);
    font-size: 0.875rem;
}

.education-item p {
    color: var(--text-secondary);
    margin-bottom: 0.25rem;
}

.skills-section h3 {
    font-size: 1.5rem;
    font-weight: 600;
    color: var(--text-primary);
    margin-bottom: 1.5rem;
}

.skills-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 2rem;
    justify-items: center;
}

.skills-grid .skill-category:nth-child(4) {
    grid-column: 1 / -1;
    max-width: 400px;
    width: 100%;
}

.skill-category {
    background: var(--card-bg);
    padding: 1.5rem;
    border-radius: 12px;
    border: 1px solid var(--border-color);
    box-shadow: var(--shadow-sm);
}

.skill-category h4 {
    color: var(--text-primary);
    margin-bottom: 1rem;
    font-weight: 600;
}

.tech-stack {
    display: flex;
    flex-wrap: wrap;
    gap: 0.75rem;
}

.tech-item {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    padding: 0.5rem 0.875rem;
    background: var(--bg-accent);
    border-radius: 6px;
    font-size: 0.875rem;
    color: var(--text-secondary);
    border: 1px solid var(--border-color);
    transition: all 0.3s ease;
}

.tech-item:hover {
    color: var(--accent-color);
    border-color: var(--accent-color);
    transform: translateY(-2px);
}

.tech-item img {
    width: 16px;
    height: 16px;
}

/* Experience Section */
.timeline {
    max-width: 800px;
    margin: 0 auto;
    position: relative;
}

.timeline::before {
    content: '';
    position: absolute;
    left: 2rem;
    top: 0;
    bottom: 0;
    width: 2px;
    background: var(--border-color);
}

.timeline-item {
    position: relative;
    margin-bottom: 3rem;
    padding-left: 5rem;
}

.timeline-item::before {
    content: '';
    position: absolute;
    left: 1.25rem;
    top: 0.5rem;
    width: 1.5rem;
    height: 1.5rem;
    background: var(--accent-color);
    border-radius: 50%;
    border: 4px solid var(--bg-primary);
}

.timeline-date {
    font-size: 0.875rem;
    color: var(--accent-color);
    font-weight: 600;
    margin-bottom: 0.5rem;
}

.timeline-content {
    background: var(--card-bg);
    padding: 1.5rem;
    border-radius: 12px;
    border: 1px solid var(--border-color);
    box-shadow: var(--shadow-sm);
}

.company-header {
    display: flex;
    align-items: center;
    gap: 1rem;
    margin-bottom: 1rem;
}

.company-logo {
    width: 40px;
    height: 40px;
    object-fit: contain;
}

.company-header h3 {
    color: var(--text-primary);
    font-weight: 600;
    margin-bottom: 0.25rem;
}

.position {
    color: var(--text-secondary);
    font-size: 0.875rem;
}

.timeline-content ul {
    list-style: none;
    padding-left: 0;
}

.timeline-content li {
    color: var(--text-secondary);
    margin-bottom: 0.5rem;
    position: relative;
    padding-left: 1.5rem;
}

.timeline-content li::before {
    content: '▶';
    position: absolute;
    left: 0;
    color: var(--accent-color);
    font-size: 0.75rem;
}

/* Projects Section */
.projects-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(400px, 1fr));
    gap: 2rem;
    max-width: 1200px;
    margin: 0 auto;
}

.project-card {
    background: var(--card-bg);
    border-radius: 16px;
    border: 1px solid var(--border-color);
    overflow: hidden;
    transition: all 0.3s ease;
    box-shadow: var(--shadow-sm);
}

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

.project-header {
    padding: 1.5rem 1.5rem 0;
    display: flex;
    justify-content: space-between;
    align-items: flex-start;
    gap: 1rem;
}

.project-header h3 {
    color: var(--text-primary);
    font-weight: 600;
    font-size: 1.25rem;
    flex: 1;
}

.project-links {
    display: flex;
    gap: 0.5rem;
    flex-shrink: 0;
}

/* Grid layout for projects with many links */
.project-links-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 0.5rem;
    padding: 0 1.5rem;
    margin-bottom: 1rem;
}

.project-link {
    display: flex;
    align-items: center;
    gap: 0.25rem;
    padding: 0.5rem;
    background: var(--bg-accent);
    border: 1px solid var(--border-color);
    border-radius: 6px;
    text-decoration: none;
    color: var(--text-secondary);
    font-size: 0.875rem;
    transition: all 0.3s ease;
}

.project-link:hover {
    color: var(--accent-color);
    border-color: var(--accent-color);
}

.project-card p {
    padding: 0 1.5rem;
    color: var(--text-secondary);
    line-height: 1.6;
    margin-bottom: 1rem;
}

.project-tech {
    padding: 0 1.5rem;
    display: flex;
    flex-wrap: wrap;
    gap: 0.5rem;
    margin-bottom: 1rem;
}

.tech-tag {
    padding: 0.25rem 0.75rem;
    background: var(--bg-accent);
    border: 1px solid var(--border-color);
    border-radius: 6px;
    font-size: 0.75rem;
    color: var(--text-accent);
}

.project-video {
    padding: 0 1.5rem 1.5rem;
}

.project-video video {
    width: 100%;
    border-radius: 8px;
    border: 1px solid var(--border-color);
}

/* Enhanced Project Styles */
.project-description {
    padding: 0 1.5rem;
}

.project-features {
    margin: 1rem 0;
}

.feature-item {
    display: flex;
    align-items: flex-start;
    gap: 0.75rem;
    margin-bottom: 0.75rem;
    padding: 0.5rem;
    background: var(--bg-accent);
    border-radius: 8px;
    border: 1px solid var(--border-color);
}

.feature-item i {
    color: var(--accent-color);
    margin-top: 0.1rem;
    flex-shrink: 0;
}

.feature-item span {
    color: var(--text-secondary);
    font-size: 0.875rem;
    line-height: 1.4;
}

.project-media {
    padding: 0 1.5rem 1.5rem;
}

.project-images {
    margin-bottom: 1rem;
}

.image-gallery {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 0.75rem;
    margin-bottom: 1rem;
}

.image-gallery img {
    width: 100%;
    height: 150px;
    object-fit: cover;
    border-radius: 8px;
    border: 1px solid var(--border-color);
    cursor: pointer;
    transition: all 0.3s ease;
}

.image-gallery img:hover {
    transform: scale(1.02);
    box-shadow: var(--shadow-md);
}

.project-video iframe {
    width: 100%;
    height: 300px;
    border-radius: 8px;
    border: 1px solid var(--border-color);
}

.linkedin-embed {
    display: flex;
    justify-content: center;
    align-items: center;
    min-height: 200px;
}

.linkedin-embed iframe {
    max-width: 100%;
    height: auto;
}

/* View More Projects Button */
.view-more-projects {
    text-align: center;
    margin-top: 3rem;
}

.btn-view-more {
    display: inline-flex;
    align-items: center;
    gap: 0.75rem;
    padding: 1rem 2rem;
    background: linear-gradient(135deg, var(--accent-color), var(--text-accent));
    color: white;
    text-decoration: none;
    border-radius: 12px;
    font-weight: 600;
    transition: all 0.3s ease;
    box-shadow: var(--shadow-md);
}

.btn-view-more:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow-lg);
    filter: brightness(1.1);
}

.btn-view-more i.fa-arrow-right {
    transition: transform 0.3s ease;
}

.btn-view-more:hover i.fa-arrow-right {
    transform: translateX(4px);
}

/* GitHub Contributions Section */
.github-contributions-section {
    margin: 4rem 0 2rem;
    padding: 2rem;
    background: var(--card-bg);
    border-radius: 16px;
    border: 1px solid var(--border-color);
    box-shadow: var(--shadow-sm);
}

.contributions-title {
    text-align: center;
    color: var(--text-primary);
    font-size: 1.75rem;
    font-weight: 600;
    margin-bottom: 2rem;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 0.75rem;
}

.contributions-title i {
    color: var(--accent-color);
    font-size: 2rem;
}

/* GitHub Stats Overview */
.github-stats-overview {
    margin-bottom: 2rem;
}

.stats-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(400px, 1fr));
    gap: 1.5rem;
    margin-bottom: 2rem;
}

.stat-item {
    display: flex;
    justify-content: center;
    align-items: center;
}

.github-stat-card {
    width: 100%;
    max-width: 500px;
    height: auto;
    border-radius: 12px;
    border: 1px solid var(--border-color);
    transition: transform 0.3s ease, box-shadow 0.3s ease;
}

.github-stat-card:hover {
    transform: translateY(-4px);
    box-shadow: var(--shadow-lg);
}

/* Contributions Calendar */
.github-contributions-calendar {
    margin-bottom: 2rem;
}

.calendar-header {
    text-align: center;
    margin-bottom: 1.5rem;
}

.calendar-header h4 {
    color: var(--text-primary);
    font-size: 1.5rem;
    font-weight: 600;
    margin-bottom: 0.5rem;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 0.5rem;
}

.calendar-header p {
    color: var(--text-secondary);
    font-size: 0.875rem;
}

.contributions-graph {
    display: flex;
    justify-content: center;
    margin-bottom: 2rem;
}

.contributions-chart {
    width: 100%;
    max-width: 800px;
    height: auto;
    border-radius: 8px;
    border: 1px solid var(--border-color);
    background: var(--bg-primary);
    padding: 1rem;
    transition: opacity 0.3s ease;
}

.enhanced-contributions {
    margin-top: 1.5rem;
}

.contributions-summary {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 1.5rem;
}

.summary-item {
    display: flex;
    align-items: flex-start;
    gap: 1rem;
    padding: 1.5rem;
    background: var(--bg-accent);
    border-radius: 12px;
    border: 1px solid var(--border-color);
    transition: all 0.3s ease;
}

.summary-item:hover {
    transform: translateY(-3px);
    box-shadow: var(--shadow-md);
}

.summary-icon {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 50px;
    height: 50px;
    background: linear-gradient(135deg, var(--accent-color), var(--text-accent));
    border-radius: 12px;
    flex-shrink: 0;
}

.summary-icon i {
    color: white;
    font-size: 1.25rem;
}

.summary-content h4 {
    color: var(--text-primary);
    font-weight: 600;
    margin-bottom: 0.5rem;
}

.summary-content p {
    color: var(--text-secondary);
    font-size: 0.875rem;
    margin-bottom: 1rem;
}

.github-profile-link, .github-repos-link {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    padding: 0.5rem 1rem;
    background: var(--card-bg);
    color: var(--accent-color);
    text-decoration: none;
    border-radius: 6px;
    border: 1px solid var(--border-color);
    font-size: 0.875rem;
    transition: all 0.3s ease;
}

.github-profile-link:hover, .github-repos-link:hover {
    background: var(--accent-color);
    color: white;
    transform: translateY(-1px);
    box-shadow: var(--shadow-sm);
}

.detailed-contributions {
    margin-top: 1rem;
    border-radius: 12px;
    overflow: hidden;
    border: 1px solid var(--border-color);
    background: var(--card-bg);
}

/* Recent Activity */
.recent-activity, .language-stats {
    margin-bottom: 2rem;
}

.recent-activity h4, .language-stats h4 {
    color: var(--text-primary);
    font-size: 1.25rem;
    font-weight: 600;
    margin-bottom: 1rem;
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.recent-activity h4 i, .language-stats h4 i {
    color: var(--accent-color);
}

.activity-feed, .language-chart {
    display: flex;
    justify-content: center;
    align-items: center;
}

.activity-graph, .languages-card {
    width: 100%;
    max-width: 900px;
    height: auto;
    border-radius: 12px;
    border: 1px solid var(--border-color);
    transition: transform 0.3s ease;
}

.languages-card {
    max-width: 450px;
}

.activity-graph:hover, .languages-card:hover {
    transform: scale(1.02);
}

/* Project Link Variants */
.project-link.demo-link:hover {
    background: #ff6b6b;
    color: white;
    border-color: #ff6b6b;
}

.project-link.visit-link:hover {
    background: #4ecdc4;
    color: white;
    border-color: #4ecdc4;
}

.project-link.download-link:hover {
    background: #45b7d1;
    color: white;
    border-color: #45b7d1;
}

.project-link.paper-link:hover {
    background: #95a5a6;
    color: white;
    border-color: #95a5a6;
}

/* Disabled Project Links */
.project-link.disabled {
    opacity: 0.6;
    cursor: not-allowed;
    pointer-events: none;
}

.project-link.disabled:hover {
    background: var(--bg-accent);
    color: var(--text-secondary);
    border-color: var(--border-color);
}

/* Contact Links */
.contact-item p a {
    color: var(--accent-color);
    text-decoration: none;
    transition: color 0.3s ease;
}

.contact-item p a:hover {
    color: var(--text-accent);
    text-decoration: underline;
}

/* Conference and Status Styles */
.conference-info {
    margin: 1rem 0;
}

.conference-badge {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    padding: 0.75rem 1rem;
    background: linear-gradient(135deg, #3498db, #2980b9);
    color: white;
    border-radius: 8px;
    font-size: 0.875rem;
    font-weight: 500;
    box-shadow: var(--shadow-sm);
}

.conference-badge i {
    color: #f39c12;
}

.project-status {
    margin-top: 1rem;
    padding: 1rem;
    background: var(--bg-accent);
    border: 1px solid var(--border-color);
    border-radius: 8px;
}

.status-info {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    color: var(--text-secondary);
    font-size: 0.875rem;
}

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

/* GIF Image Styling */
.gif-image {
    border: 2px solid var(--accent-color) !important;
    position: relative;
}

.gif-image::after {
    content: "GIF";
    position: absolute;
    top: 4px;
    right: 4px;
    background: var(--accent-color);
    color: white;
    padding: 2px 6px;
    border-radius: 4px;
    font-size: 0.625rem;
    font-weight: bold;
}

/* Publications Section */
.publications-list {
    max-width: 1000px;
    margin: 0 auto;
}

.publication-item {
    background: var(--card-bg);
    padding: 1.5rem;
    border-radius: 12px;
    border: 1px solid var(--border-color);
    margin-bottom: 1.5rem;
    box-shadow: var(--shadow-sm);
    transition: all 0.3s ease;
}

.publication-item:hover {
    box-shadow: var(--shadow-md);
    transform: translateY(-2px);
}

.publication-content {
    display: block;
}

.publication-header {
    display: flex;
    align-items: flex-start;
    gap: 1rem;
}

.publication-details {
    flex: 1;
}

.conference-logo {
    width: 50px;
    height: 50px;
    object-fit: contain;
    flex-shrink: 0;
}

.publication-header h3 {
    color: var(--text-primary);
    font-weight: 600;
    margin-bottom: 0.5rem;
    line-height: 1.4;
}

.conference {
    color: var(--text-secondary);
    font-size: 0.875rem;
    margin-bottom: 0.25rem;
}

.status {
    color: var(--accent-color);
    font-size: 0.875rem;
    font-weight: 500;
    margin-bottom: 1rem;
}

.publication-actions {
    display: flex;
    gap: 0.5rem;
    flex-wrap: wrap;
}

.btn-paper-preview,
.btn-certificate {
    display: inline-flex;
    align-items: center;
    gap: 0.25rem;
    padding: 0.5rem 0.875rem;
    background: var(--bg-accent);
    border: 1px solid var(--border-color);
    border-radius: 6px;
    text-decoration: none;
    color: var(--text-secondary);
    font-size: 0.875rem;
    transition: all 0.3s ease;
    cursor: pointer;
}

.btn-paper-preview:hover,
.btn-certificate:hover {
    color: var(--accent-color);
    border-color: var(--accent-color);
    background: var(--card-bg);
}

.btn-certificate-small {
    display: inline-flex;
    align-items: center;
    gap: 0.25rem;
    padding: 0.375rem 0.75rem;
    background: var(--bg-accent);
    border: 1px solid var(--border-color);
    border-radius: 6px;
    text-decoration: none;
    color: var(--text-secondary);
    font-size: 0.75rem;
    transition: all 0.3s ease;
    cursor: pointer;
    margin-top: 0.75rem;
}

.btn-certificate-small:hover {
    color: var(--accent-color);
    border-color: var(--accent-color);
    background: var(--card-bg);
    transform: translateY(-1px);
}

.status-badge {
    display: inline-flex;
    align-items: center;
    gap: 0.25rem;
    padding: 0.5rem 0.875rem;
    background: var(--accent-color);
    color: white;
    border-radius: 6px;
    font-size: 0.875rem;
    font-weight: 500;
}

.internship-certificate {
    margin-top: 1rem;
    padding-top: 1rem;
    border-top: 1px solid var(--border-color);
}



/* Certifications Section */
.certifications-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(350px, 1fr));
    gap: 2rem;
    max-width: 1200px;
    margin: 0 auto;
}

.cert-category {
    background: var(--card-bg);
    padding: 1.5rem;
    border-radius: 12px;
    border: 1px solid var(--border-color);
    box-shadow: var(--shadow-sm);
}

.cert-category h3 {
    color: var(--text-primary);
    font-weight: 600;
    margin-bottom: 1rem;
    padding-bottom: 0.5rem;
    border-bottom: 2px solid var(--border-color);
}

.cert-list {
    display: flex;
    flex-direction: column;
    gap: 0.75rem;
}

.cert-item {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    padding: 0.75rem;
    background: var(--bg-accent);
    border-radius: 8px;
    border: 1px solid var(--border-color);
    transition: all 0.3s ease;
    cursor: pointer;
    position: relative;
}

.cert-item:hover {
    transform: translateX(5px);
    border-color: var(--accent-color);
    background: var(--card-bg);
}

.cert-logo {
    width: 30px;
    height: 30px;
    object-fit: contain;
    flex-shrink: 0;
}

.cert-item span {
    color: var(--text-secondary);
    font-size: 0.875rem;
    line-height: 1.4;
    flex: 1;
}

.cert-view-icon {
    color: var(--text-accent);
    font-size: 0.75rem;
    opacity: 0;
    transition: opacity 0.3s ease;
}

.cert-item:hover .cert-view-icon {
    opacity: 1;
    color: var(--accent-color);
}

/* Achievements Section */
.achievements-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 2rem;
    max-width: 1200px;
    margin: 0 auto;
}

.achievement-item {
    background: var(--card-bg);
    padding: 1.5rem;
    border-radius: 12px;
    border: 1px solid var(--border-color);
    text-align: center;
    box-shadow: var(--shadow-sm);
    transition: all 0.3s ease;
}

.achievement-item:hover {
    transform: translateY(-5px);
    box-shadow: var(--shadow-md);
}

.achievement-icon {
    width: 60px;
    height: 60px;
    background: var(--gradient-primary);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    margin: 0 auto 1rem;
    color: white;
    font-size: 1.5rem;
}

.achievement-item h3 {
    color: var(--text-primary);
    font-weight: 600;
    margin-bottom: 0.5rem;
}

.achievement-item p {
    color: var(--text-secondary);
    font-size: 0.875rem;
}

/* Contact Section */
.contact-content {
    max-width: 800px;
    margin: 0 auto;
}

.contact-info {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 2rem;
}

.contact-item {
    display: flex;
    align-items: center;
    gap: 1rem;
    padding: 1.5rem;
    background: var(--card-bg);
    border-radius: 12px;
    border: 1px solid var(--border-color);
    box-shadow: var(--shadow-sm);
    transition: all 0.3s ease;
}

.contact-item:hover {
    transform: translateY(-3px);
    box-shadow: var(--shadow-md);
}

.contact-item i {
    font-size: 1.5rem;
    color: var(--accent-color);
    width: 40px;
    text-align: center;
}

.contact-item h3 {
    color: var(--text-primary);
    font-weight: 600;
    margin-bottom: 0.25rem;
}

.contact-item p {
    color: var(--text-secondary);
    font-size: 0.875rem;
}

/* Footer */
.footer {
    background: var(--bg-accent);
    border-top: 1px solid var(--border-color);
    padding: 2rem 0;
    text-align: center;
}

.footer p {
    color: var(--text-secondary);
}

/* Responsive Design */
@media (max-width: 768px) {
    .nav-container {
        padding: 1rem;
    }
    
    .nav-links {
        gap: 1rem;
    }
    
    .nav-links a {
        font-size: 0.875rem;
    }
    
    .hero {
        padding: 4rem 1rem 2rem;
    }
    
    .hero-stats {
        gap: 2rem;
    }
    
    .hero-links {
        flex-direction: column;
        align-items: center;
    }
    
    .coding-profiles {
        flex-direction: column;
        align-items: center;
        gap: 1rem;
    }
    
    .container {
        padding: 0 1rem;
    }
    
    .projects-grid {
        grid-template-columns: 1fr;
    }
    
    .skills-grid {
        grid-template-columns: 1fr;
    }
    
    .skills-grid .skill-category:nth-child(4) {
        grid-column: 1;
        max-width: none;
    }
    
    .certifications-grid {
        grid-template-columns: 1fr;
    }
    
    .achievements-grid {
        grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    }
    
    .timeline {
        padding-left: 1rem;
    }
    
    .timeline::before {
        left: 1rem;
    }
    
    .timeline-item {
        padding-left: 3rem;
    }
    
    .timeline-item::before {
        left: 0.25rem;
    }
    
    .company-header {
        flex-direction: column;
        align-items: flex-start;
        gap: 0.5rem;
    }
    
    .project-header {
        flex-direction: column;
        align-items: flex-start;
        gap: 1rem;
    }
    
    .project-links {
        flex-wrap: wrap;
        gap: 0.25rem;
    }
    
    .project-links-grid {
        grid-template-columns: 1fr;
        gap: 0.25rem;
        padding: 0 1rem;
    }
    
    .project-link {
        font-size: 0.75rem;
        padding: 0.375rem 0.5rem;
    }
    
    .image-gallery {
        grid-template-columns: 1fr;
    }
    
    .project-video iframe {
        height: 250px;
    }
    
    .linkedin-embed iframe {
        width: 100%;
        height: 350px;
    }
    
    .btn-view-more {
        padding: 0.875rem 1.5rem;
        font-size: 0.875rem;
    }
    
    /* GitHub Contributions Mobile */
    .github-contributions-section {
        margin: 3rem 0 1.5rem;
        padding: 1.5rem;
    }
    
    .contributions-title {
        font-size: 1.5rem;
        flex-direction: column;
        gap: 0.5rem;
    }
    
    .stats-grid {
        grid-template-columns: 1fr;
        gap: 1rem;
    }
    
    .github-stat-card, .contributions-chart, .activity-graph, .languages-card {
        max-width: 100%;
    }
    
    .contributions-summary {
        grid-template-columns: 1fr;
        gap: 1rem;
    }
    
    .summary-item {
        padding: 1rem;
    }
    
    .detailed-contributions iframe {
        height: 300px;
    }
    
    .publication-actions {
        justify-content: center;
    }
}

@media (max-width: 480px) {
    .hero-title {
        font-size: 2.5rem;
    }
    
    .hero-subtitle {
        font-size: 1.125rem;
    }
    
    .section-title {
        font-size: 2rem;
    }
    
    .stat-number {
        font-size: 1.5rem;
    }
    
    .btn {
        padding: 0.75rem 1.25rem;
        font-size: 0.875rem;
    }
    
    .profile-image {
        width: 150px;
        height: 150px;
    }
    
    .nav-profile-img {
        width: 35px;
        height: 35px;
    }
    
    .modal-content {
        width: 95%;
        padding: 1rem;
        max-height: 90vh;
        overflow-y: auto;
    }
    
    .modal-content img {
        max-height: 60vh;
    }
    
    .close-modal {
        top: 0.5rem;
        right: 1rem;
        font-size: 24px;
        width: 35px;
        height: 35px;
    }
    
    .modal-title {
        font-size: 1.25rem;
    }
    
    .modal-caption {
        font-size: 1rem;
        margin-top: 1rem;
    }
    
    .modal-actions {
        flex-direction: column;
        gap: 0.75rem;
    }
    
    .btn-modal-action {
        width: 100%;
        justify-content: center;
    }
}

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

/* Modal Styles */
.modal {
    display: none;
    position: fixed;
    z-index: 2000;
    left: 0;
    top: 0;
    width: 100%;
    height: 100%;
    background-color: rgba(0, 0, 0, 0.95);
    backdrop-filter: blur(10px);
    animation: modalBackdropFadeIn 0.3s ease;
}

.modal-content {
    position: relative;
    margin: auto;
    padding: 2rem;
    width: 95%;
    max-width: 900px;
    top: 50%;
    transform: translateY(-50%);
    text-align: center;
    background: var(--card-bg);
    border-radius: 16px;
    border: 1px solid var(--border-color);
    box-shadow: 0 25px 50px -12px rgba(0, 0, 0, 0.5);
    animation: modalContentSlideIn 0.4s ease;
}

.modal-content img {
    max-width: 100%;
    max-height: 70vh;
    object-fit: contain;
    border-radius: 12px;
    box-shadow: var(--shadow-lg);
    border: 1px solid var(--border-color);
}

.close-modal {
    position: absolute;
    top: 1rem;
    right: 1.5rem;
    color: var(--text-secondary);
    font-size: 28px;
    font-weight: bold;
    cursor: pointer;
    transition: all 0.3s ease;
    width: 40px;
    height: 40px;
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: 50%;
    background: var(--bg-accent);
    border: 1px solid var(--border-color);
}

.close-modal:hover {
    color: var(--accent-color);
    background: var(--accent-color);
    color: white;
    transform: scale(1.1);
}

.modal-caption {
    color: var(--text-primary);
    font-size: 1.25rem;
    margin-top: 1.5rem;
    font-weight: 600;
    padding: 1rem;
    background: var(--bg-accent);
    border-radius: 8px;
    border: 1px solid var(--border-color);
}

.modal-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    margin-bottom: 1.5rem;
    padding-bottom: 1rem;
    border-bottom: 2px solid var(--border-color);
}

.modal-title {
    color: var(--text-primary);
    font-size: 1.5rem;
    font-weight: 700;
    margin: 0;
}

.modal-subtitle {
    color: var(--text-secondary);
    font-size: 0.875rem;
    margin-top: 0.25rem;
}

.modal-actions {
    margin-top: 1.5rem;
    display: flex;
    gap: 1rem;
    justify-content: center;
}

.btn-modal-action {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    padding: 0.75rem 1.5rem;
    background: var(--accent-color);
    color: white;
    border: none;
    border-radius: 8px;
    text-decoration: none;
    font-weight: 500;
    transition: all 0.3s ease;
    cursor: pointer;
}

.btn-modal-action:hover {
    background: var(--accent-hover);
    transform: translateY(-2px);
    box-shadow: var(--shadow-md);
}

.btn-modal-secondary {
    background: var(--bg-accent);
    color: var(--text-primary);
    border: 1px solid var(--border-color);
}

.btn-modal-secondary:hover {
    background: var(--card-bg);
    border-color: var(--accent-color);
    color: var(--accent-color);
}

/* Modal Animation */
@keyframes modalBackdropFadeIn {
    from {
        opacity: 0;
    }
    to {
        opacity: 1;
    }
}

@keyframes modalContentSlideIn {
    from {
        opacity: 0;
        transform: translateY(-60%) scale(0.9);
    }
    to {
        opacity: 1;
        transform: translateY(-50%) scale(1);
    }
}

.modal.show {
    display: block !important;
}

/* Loading animations */
@keyframes fadeInUp {
    from {
        opacity: 0;
        transform: translateY(30px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.hero-content > * {
    animation: fadeInUp 0.8s ease-out;
}

.hero-title {
    animation-delay: 0.1s;
}

.hero-subtitle {
    animation-delay: 0.2s;
}

.hero-stats {
    animation-delay: 0.3s;
}

/* Mobile Optimized Layout */
@media screen and (max-width: 768px) {
    /* Fixed Mobile Navigation */
    .navbar {
        padding: 0.5rem 0;
        height: auto;
        position: fixed;
        top: 0;
        width: 100%;
        z-index: 1000;
    }
    
    .nav-container {
        padding: 0.5rem 1rem;
        display: flex;
        align-items: center;
        gap: 1rem;
        overflow: hidden;
    }
    
    /* Fixed brand section on the left */
    .nav-brand {
        flex-shrink: 0;
        min-width: auto;
    }
    
    .nav-profile-container {
        display: flex;
        align-items: center;
        gap: 0.5rem;
    }
    
    .nav-profile-container h2 {
        font-size: 1rem;
        margin: 0;
        white-space: nowrap;
    }
    
    .nav-profile-img {
        width: 28px;
        height: 28px;
        flex-shrink: 0;
    }
    
    /* Scrollable navigation container */
    .nav-links {
        display: flex;
        align-items: center;
        gap: 0.75rem;
        overflow-x: auto;
        padding: 0.25rem 0;
        flex: 1;
        scrollbar-width: none; /* Firefox */
        -ms-overflow-style: none; /* IE/Edge */
        scroll-behavior: smooth;
        position: relative;
    }
    
    .nav-links::-webkit-scrollbar {
        display: none; /* Chrome/Safari */
    }
    
    /* Theme toggle as first button */
    .theme-toggle {
        order: -1;
        margin: 0;
        padding: 0.4rem;
        font-size: 0.9rem;
        flex-shrink: 0;
        border-radius: 15px;
        background: var(--bg-accent);
        border: 1px solid var(--border-color);
        color: var(--text-primary);
        transition: all 0.3s ease;
    }
    
    .theme-toggle:hover {
        background: var(--accent-color);
        color: white;
        transform: translateY(-1px);
    }
    
    /* Navigation buttons */
    .nav-links a {
        font-size: 0.8rem;
        padding: 0.4rem 0.8rem;
        border-radius: 15px;
        white-space: nowrap;
        flex-shrink: 0;
        background: var(--bg-accent);
        border: 1px solid var(--border-color);
        transition: all 0.3s ease;
        box-shadow: none !important;
        text-decoration: none;
        color: var(--text-primary);
    }
    
    .nav-links a:hover {
        background: var(--accent-color);
        color: white;
        transform: translateY(-1px);
        box-shadow: 0 2px 8px rgba(0,0,0,0.1) !important;
    }
    
    /* Gradient fade effect on right edge */
    .nav-links::after {
        content: '';
        position: absolute;
        top: 0;
        right: -1rem;
        bottom: 0;
        width: 20px;
        background: linear-gradient(to left, var(--nav-bg), transparent);
        pointer-events: none;
        z-index: 1;
    }
    
    /* Hero Section Mobile - Adjusted for fixed header */
    .hero {
        padding: 6rem 0 4rem;
        min-height: 100vh;
    }
    
    .hero-profile {
        margin-bottom: 2rem;
    }
    
    .profile-image {
        width: 120px;
        height: 120px;
    }
    
    .hero-title {
        font-size: 2.5rem;
        margin-bottom: 1rem;
    }
    
    .hero-subtitle {
        font-size: 1.1rem;
        margin-bottom: 2rem;
    }
    
    .hero-stats {
        flex-direction: column;
        gap: 1.5rem;
        margin-bottom: 2rem;
    }
    
    .stat-number {
        font-size: 1.75rem;
    }
    
    .stat-label {
        font-size: 0.8rem;
    }
    
    .hero-links {
        flex-direction: column;
        gap: 0.75rem;
        align-items: center;
    }
    
    .btn {
        width: 100%;
        max-width: 280px;
        justify-content: center;
    }
    
    /* About Section Mobile */
    .about {
        padding: 3rem 0;
    }
    
    .container {
        padding: 0 1rem;
    }
    
    .section-title {
        font-size: 2rem;
        margin-bottom: 2rem;
    }
    
    .skills-grid {
        grid-template-columns: 1fr;
        gap: 2rem;
    }
    
    .tech-stack {
        gap: 0.75rem;
    }
    
    .tech-item {
        font-size: 0.875rem;
        padding: 0.5rem 0.75rem;
    }
    
    /* Experience Section Mobile */
    .timeline-item {
        padding-left: 2rem;
        margin-bottom: 2rem;
    }
    
    .timeline-item::before {
        left: 0.5rem;
        top: 1.5rem;
        width: 1rem;
        height: 1rem;
        border: 2px solid var(--bg-primary);
    }
    
    .timeline-date {
        font-size: 0.875rem;
        margin-bottom: 0.75rem;
        padding-left: 0;
    }
    
    .timeline-content {
        margin-top: 0.5rem;
    }
    
    .company-header {
        flex-direction: column;
        align-items: flex-start;
        gap: 0.5rem;
    }
    
    .company-logo {
        width: 40px;
        height: 40px;
    }
    
    /* Projects Section Mobile */
    .projects {
        padding: 3rem 0;
    }
    
    .projects-grid {
        grid-template-columns: 1fr;
        gap: 2rem;
    }
    
    .project-card {
        padding: 1.5rem;
    }
    
    .project-header {
        flex-direction: column;
        align-items: flex-start;
        gap: 1rem;
    }
    
    .project-header h3 {
        font-size: 1.25rem;
        line-height: 1.4;
    }
    
    .project-links {
        flex-wrap: wrap;
        gap: 0.5rem;
    }
    
    .project-link {
        font-size: 0.875rem;
        padding: 0.5rem 0.75rem;
    }
    
    .project-links-grid {
        grid-template-columns: 1fr 1fr;
        gap: 0.75rem;
    }
    
    .tech-tag {
        font-size: 0.75rem;
        padding: 0.375rem 0.5rem;
    }
    
    .image-gallery {
        grid-template-columns: 1fr;
        gap: 1rem;
    }
    
    .project-video iframe {
        height: 200px;
    }
    
    /* Demo Placeholder for Mobile */
    .demo-placeholder {
        background: var(--bg-accent);
        border: 2px dashed var(--border-color);
        border-radius: 12px;
        padding: 2rem 1rem;
        text-align: center;
        min-height: 200px;
        display: flex;
        align-items: center;
        justify-content: center;
    }
    
    .demo-content i.fas {
        font-size: 3rem;
        color: var(--accent-color);
        margin-bottom: 1rem;
    }
    
    .demo-content h4 {
        font-size: 1.1rem;
        margin-bottom: 0.5rem;
        color: var(--text-primary);
    }
    
    .demo-content p {
        font-size: 0.9rem;
        color: var(--text-secondary);
        margin-bottom: 1rem;
    }
    
    .demo-link {
        display: inline-flex;
        align-items: center;
        gap: 0.5rem;
        padding: 0.75rem 1.5rem;
        background: var(--accent-color);
        color: white;
        text-decoration: none;
        border-radius: 25px;
        font-size: 0.9rem;
        font-weight: 500;
        transition: all 0.3s ease;
    }
    
    .demo-link:hover {
        background: var(--accent-hover);
        transform: translateY(-2px);
    }
    
    /* GitHub Section Mobile */
    .github-contributions-section {
        margin-top: 3rem;
    }
    
    .github-stats-overview .stats-grid {
        grid-template-columns: 1fr;
        gap: 1rem;
    }
    
    .contributions-chart,
    .activity-graph,
    .languages-card {
        max-width: 100%;
        height: auto;
    }
    
    /* Publications Mobile */
    .publications-list {
        gap: 1.5rem;
    }
    
    .publication-item {
        padding: 1.5rem;
    }
    
    /* Certifications Mobile */
    .certifications-grid {
        grid-template-columns: 1fr;
        gap: 2rem;
    }
    
    .cert-list {
        gap: 1rem;
    }
    
    /* Achievements Mobile */
    .achievements-grid {
        grid-template-columns: 1fr;
        gap: 1.5rem;
    }
    
    .achievement-item {
        padding: 1.5rem;
    }
    
    /* Contact Mobile */
    .contact-info {
        grid-template-columns: 1fr;
        gap: 1rem;
    }
    
    /* Modal Mobile */
    .modal-content {
        margin: 2rem 1rem;
        max-height: calc(100vh - 4rem);
        overflow-y: auto;
    }
    
    .modal-header {
        padding: 1rem;
    }
    
    .modal-actions {
        padding: 1rem;
        gap: 0.5rem;
    }
    
    .btn-modal-action {
        flex: 1;
        min-height: 44px;
    }
}

/* Small Mobile Devices */
@media screen and (max-width: 480px) {
    .nav-profile-container h2 {
        font-size: 0.9rem;
    }
    
    .nav-profile-img {
        width: 24px;
        height: 24px;
    }
    
    .theme-toggle {
        padding: 0.35rem;
        font-size: 0.8rem;
    }
    
    .nav-links a {
        font-size: 0.75rem;
        padding: 0.35rem 0.7rem;
    }
    
    .nav-container {
        padding: 0.4rem 0.8rem;
        gap: 0.8rem;
    }
    
    .hero {
        padding: 5.5rem 0 3rem;
    }
    
    .hero-title {
        font-size: 2rem;
    }
    
    .hero-subtitle {
        font-size: 1rem;
    }
    
    .nav-links {
        font-size: 0.8rem;
        gap: 0.5rem;
    }
    
    .project-card {
        padding: 1rem;
    }
    
    .project-header h3 {
        font-size: 1.1rem;
    }
    
    .stat-number {
        font-size: 1.5rem;
    }
    
    .container {
        padding: 0 0.75rem;
    }
}

.hero-links {
    animation-delay: 0.4s;
}

.coding-profiles {
    animation-delay: 0.5s;
}