:root {
            --primary-color: #2c3e50;
            --secondary-color: #3498db;
            --accent-color: #e74c3c;
            --success-color: #27ae60;
            --warning-color: #f39c12;
            --planning-color: #9b59b6;
            --light-bg: #f8f9fa;
            --white: #ffffff;
            --text-dark: #2c3e50;
            --text-muted: #6c757d;
            --border-color: #e9ecef;
            --shadow: 0 2px 10px rgba(0,0,0,0.1);
            --shadow-hover: 0 5px 25px rgba(0,0,0,0.15);
            --transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
        }

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

        body {
            font-family: 'Inter', sans-serif;
            line-height: 1.6;
            color: var(--text-dark);
            background-color: var(--white);
            scroll-behavior: smooth;
        }

        .container {
            max-width: 1200px;
            margin: 0 auto;
            padding: 0 20px;
        }

        /* Header Styles */
        .header {
            background: var(--white);
            padding: 1rem 0;
            position: fixed;
            top: 0;
            left: 0;
            right: 0;
            z-index: 1000;
            box-shadow: var(--shadow);
            transition: var(--transition);
        }

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

        .logo {
            font-family: 'Playfair Display', serif;
            font-size: 1.8rem;
            font-weight: 700;
            color: var(--primary-color);
            text-decoration: none;
        }

        .nav-menu {
            display: flex;
            list-style: none;
            gap: 2rem;
        }

        .nav-link {
            text-decoration: none;
            color: var(--text-dark);
            font-weight: 500;
            position: relative;
            transition: var(--transition);
        }

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

        .nav-link::after {
            content: '';
            position: absolute;
            bottom: -5px;
            left: 0;
            width: 0;
            height: 2px;
            background: var(--secondary-color);
            transition: var(--transition);
        }

        .nav-link:hover::after, .nav-link.active::after {
            width: 100%;
        }

        .mobile-menu-toggle {
            display: none;
            background: none;
            border: none;
            font-size: 1.5rem;
            color: var(--primary-color);
            cursor: pointer;
        }

        /* Hero Section */
        .hero {
            background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
            color: var(--white);
            padding: 120px 0 80px;
            text-align: center;
            position: relative;
            overflow: hidden;
        }

        .hero::before {
            content: '';
            position: absolute;
            top: 0;
            left: 0;
            right: 0;
            bottom: 0;
            background: rgba(0,0,0,0.3);
            z-index: 1;
        }

        .hero-content {
            position: relative;
            z-index: 2;
        }

        .hero-title {
            font-family: 'Playfair Display', serif;
            font-size: 3.5rem;
            font-weight: 700;
            margin-bottom: 1rem;
            line-height: 1.2;
        }

        .hero-subtitle {
            font-size: 1.3rem;
            margin-bottom: 1.5rem;
            opacity: 0.9;
        }

        .hero-description {
            font-size: 1.1rem;
            max-width: 600px;
            margin: 0 auto 2rem;
            opacity: 0.8;
        }

        .cta-button {
            display: inline-block;
            background: var(--accent-color);
            color: var(--white);
            padding: 12px 30px;
            text-decoration: none;
            border-radius: 5px;
            font-weight: 600;
            transition: var(--transition);
            margin: 0 10px;
        }

        .cta-button:hover {
            background: #c0392b;
            transform: translateY(-2px);
        }

        .cta-button.secondary {
            background: transparent;
            border: 2px solid var(--white);
        }

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

        /* Section Styles */
        .section {
            padding: 80px 0;
            opacity: 0;
            transform: translateY(30px);
            transition: opacity 0.6s ease, transform 0.6s ease;
        }

        .section.visible {
            opacity: 1;
            transform: translateY(0);
        }

        .section-alt {
            background: var(--light-bg);
        }

        .section-title {
            font-family: 'Playfair Display', serif;
            font-size: 2.5rem;
            text-align: center;
            margin-bottom: 3rem;
            color: var(--primary-color);
            position: relative;
        }

        .section-title::after {
            content: '';
            position: absolute;
            bottom: -10px;
            left: 50%;
            transform: translateX(-50%);
            width: 60px;
            height: 3px;
            background: var(--secondary-color);
        }

        /* About Section */
        .about-grid {
            display: grid;
            grid-template-columns: 1fr 2fr;
            gap: 4rem;
            align-items: center;
        }

        .profile-image {
            width: 100%;
            max-width: 400px;
            border-radius: 10px;
            box-shadow: var(--shadow);
        }

        .about-content p {
            margin-bottom: 1.5rem;
            font-size: 1.1rem;
            line-height: 1.8;
        }

        .skills-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
            gap: 2rem;
            margin-top: 3rem;
        }

        .skill-card {
            background: var(--white);
            padding: 2rem;
            border-radius: 10px;
            box-shadow: var(--shadow);
            text-align: center;
            transition: var(--transition);
        }

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

        .skill-icon {
            font-size: 3rem;
            color: var(--secondary-color);
            margin-bottom: 1rem;
        }

        .skill-card h3 {
            margin-bottom: 1rem;
            color: var(--primary-color);
        }

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

        .timeline::before {
            content: '';
            position: absolute;
            left: 50%;
            transform: translateX(-50%);
            top: 0;
            bottom: 0;
            width: 2px;
            background: var(--secondary-color);
        }

        .timeline-item {
            position: relative;
            margin-bottom: 2rem;
        }

        .timeline-content {
            background: var(--white);
            padding: 2rem;
            border-radius: 10px;
            box-shadow: var(--shadow);
            width: 45%;
            position: relative;
        }

        .timeline-item:nth-child(odd) .timeline-content {
            margin-left: 55%;
        }

        .timeline-item:nth-child(even) .timeline-content {
            margin-right: 55%;
        }

        .timeline-date {
            background: var(--secondary-color);
            color: var(--white);
            padding: 0.5rem 1rem;
            border-radius: 20px;
            font-weight: 600;
            position: absolute;
            left: 50%;
            transform: translateX(-50%);
            top: 2rem;
            z-index: 10;
        }

        .timeline-content h3 {
            color: var(--primary-color);
            margin-bottom: 0.5rem;
        }

        /* Research & Experience */
        .experience-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(350px, 1fr));
            gap: 2rem;
        }

        .experience-card {
            background: var(--white);
            padding: 2rem;
            border-radius: 10px;
            box-shadow: var(--shadow);
            transition: var(--transition);
            border-left: 4px solid var(--secondary-color);
            position: relative;
        }

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

        .experience-header {
            display: flex;
            justify-content: space-between;
            align-items: flex-start;
            margin-bottom: 1rem;
        }

        .experience-title {
            color: var(--primary-color);
            margin-bottom: 0.5rem;
        }

        .experience-organization {
            color: var(--secondary-color);
            font-weight: 600;
        }

        .experience-badge {
            background: var(--success-color);
            color: var(--white);
            padding: 0.3rem 0.8rem;
            border-radius: 15px;
            font-size: 0.8rem;
            font-weight: 600;
        }

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

        .project-card {
            background: var(--white);
            border-radius: 15px;
            box-shadow: var(--shadow);
            overflow: hidden;
            transition: var(--transition);
            position: relative;
        }

        .project-card:hover {
            transform: translateY(-8px);
            box-shadow: var(--shadow-hover);
        }

        .project-header {
            background: linear-gradient(135deg, var(--secondary-color), var(--primary-color));
            color: var(--white);
            padding: 1.5rem;
        }

        .project-title {
            font-size: 1.3rem;
            font-weight: 600;
            margin-bottom: 0.5rem;
        }

        .project-subtitle {
            font-size: 0.9rem;
            opacity: 0.9;
        }

        .project-body {
            padding: 2rem;
        }

        .project-description {
            margin-bottom: 1.5rem;
            line-height: 1.6;
        }

        .project-tags {
            display: flex;
            flex-wrap: wrap;
            gap: 0.5rem;
            margin-bottom: 1.5rem;
        }

        .project-tag {
            background: var(--light-bg);
            color: var(--text-dark);
            padding: 0.3rem 0.8rem;
            border-radius: 15px;
            font-size: 0.8rem;
            font-weight: 500;
        }

        .project-status {
            display: inline-block;
            padding: 0.4rem 1rem;
            border-radius: 20px;
            font-size: 0.8rem;
            font-weight: 600;
        }

        /* Enhanced project status colors - auto-change based on status */
        .status-ongoing {
            background: var(--warning-color);
            color: var(--white);
        }

        .status-completed {
            background: var(--success-color);
            color: var(--white);
        }

        .status-planning {
            background: var(--planning-color);
            color: var(--white);
        }

        /* Certifications Section */
        .certifications-container {
            background: var(--white);
            border-radius: 15px;
            padding: 2rem;
            box-shadow: var(--shadow);
            margin-bottom: 2rem;
        }

        .cert-tabs {
            display: flex;
            gap: 1rem;
            margin-bottom: 2rem;
            flex-wrap: wrap;
        }

        .cert-tab {
            background: var(--light-bg);
            border: none;
            padding: 0.8rem 1.5rem;
            border-radius: 25px;
            cursor: pointer;
            font-weight: 600;
            transition: var(--transition);
            color: var(--text-dark);
        }

        .cert-tab.active {
            background: var(--secondary-color);
            color: var(--white);
        }

        .cert-content {
            display: none;
        }

        .cert-content.active {
            display: block;
        }

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

        .cert-item {
            background: var(--light-bg);
            padding: 1.5rem;
            border-radius: 10px;
            border-left: 4px solid var(--warning-color);
            transition: var(--transition);
            position: relative;
        }

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

        .cert-item h4 {
            color: var(--primary-color);
            margin-bottom: 0.5rem;
        }

        .cert-date {
            color: var(--text-muted);
            font-size: 0.9rem;
            margin-bottom: 0.5rem;
        }

        .cert-organization {
            color: var(--secondary-color);
            font-weight: 600;
            margin-bottom: 1rem;
        }

        /* Certificate badge styles */
        .cert-badge {
            position: absolute;
            top: 1rem;
            right: 1rem;
            width: 40px;
            height: 40px;
            background: var(--accent-color);
            border-radius: 50%;
            display: flex;
            align-items: center;
            justify-content: center;
            color: var(--white);
            font-weight: bold;
            font-size: 1.2rem;
            box-shadow: 0 2px 5px rgba(0,0,0,0.2);
        }

        .cert-badge i {
            font-size: 1.2rem;
        }

        /* Blog Styles */
        .blog-post {
            background: var(--white);
            padding: 2rem;
            border-radius: 10px;
            box-shadow: var(--shadow);
            margin-bottom: 1.5rem;
            border-left: 4px solid var(--secondary-color);
            transition: var(--transition);
        }
        
        .blog-post:hover {
            transform: translateY(-5px);
            box-shadow: var(--shadow-hover);
        }
        
        .blog-title {
            color: var(--primary-color);
            margin-bottom: 0.5rem;
            font-weight: 600;
        }
        
        .blog-meta {
            color: var(--text-muted);
            font-size: 0.9rem;
            margin-bottom: 1rem;
            display: flex;
            align-items: center;
        }
        
        .blog-date {
            margin-right: 1rem;
        }
        
        .blog-author {
            font-weight: 600;
            display: flex;
            align-items: center;
        }
        
        /* Badge for Swetha P in blog section */
        .author-badge {
            width: 20px;
            height: 20px;
            margin-left: 5px;
            vertical-align: middle;
        }
        
        .blog-labels {
            display: flex;
            flex-wrap: wrap;
            gap: 0.5rem;
            margin-bottom: 1rem;
        }
        
        .blog-label {
            padding: 0.2rem 0.6rem;
            border-radius: 15px;
            font-size: 0.8rem;
            color: white;
        }
        
        .blog-excerpt {
            margin-bottom: 1rem;
            line-height: 1.6;
        }
        
        .blog-read-more {
            background: var(--secondary-color);
            color: var(--white);
            border: none;
            padding: 0.5rem 1rem;
            border-radius: 5px;
            cursor: pointer;
            font-weight: 600;
            transition: var(--transition);
        }
        
        .blog-read-more:hover {
            background: var(--primary-color);
        }
        
        .blog-loading, .blog-no-posts {
            text-align: center;
            padding: 2rem;
            color: var(--text-muted);
        }
        
        /* Modal styles */
        .blog-modal-container {
            position: fixed;
            top: 0;
            left: 0;
            right: 0;
            bottom: 0;
            background: rgba(0,0,0,0.7);
            display: flex;
            justify-content: center;
            align-items: center;
            z-index: 2000;
            padding: 20px;
            overflow-y: auto;
        }
        
        .blog-modal-content {
            background: var(--white);
            width: 100%;
            max-width: 800px;
            max-height: 90vh;
            border-radius: 10px;
            padding: 2rem;
            overflow-y: auto;
            position: relative;
        }
        
        .blog-modal-close {
            position: absolute;
            top: 1rem;
            right: 1rem;
            background: var(--primary-color);
            color: var(--white);
            border: none;
            width: 30px;
            height: 30px;
            border-radius: 50%;
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 1.5rem;
            cursor: pointer;
            transition: var(--transition);
        }
        
        .blog-modal-close:hover {
            background: var(--accent-color);
        }
        
        .blog-modal-title {
            color: var(--primary-color);
            margin-bottom: 1rem;
        }
        
        .blog-modal-meta {
            color: var(--text-muted);
            font-size: 0.9rem;
            margin-bottom: 2rem;
        }
        
        .blog-modal-content-body {
            line-height: 1.8;
        }
        
        /* GitHub markdown styles */
        .blog-modal-content-body h1,
        .blog-modal-content-body h2,
        .blog-modal-content-body h3,
        .blog-modal-content-body h4,
        .blog-modal-content-body h5,
        .blog-modal-content-body h6 {
            margin-top: 24px;
            margin-bottom: 16px;
            font-weight: 600;
            line-height: 1.25;
        }
        
        .blog-modal-content-body h1 {
            font-size: 2em;
            border-bottom: 1px solid #eaecef;
            padding-bottom: 0.3em;
        }
        
        .blog-modal-content-body h2 {
            font-size: 1.5em;
            border-bottom: 1px solid #eaecef;
            padding-bottom: 0.3em;
        }
        
        .blog-modal-content-body h3 {
            font-size: 1.25em;
        }
        
        .blog-modal-content-body p {
            margin-top: 0;
            margin-bottom: 16px;
        }
        
        .blog-modal-content-body code {
            padding: 0.2em 0.4em;
            margin: 0;
            font-size: 85%;
            background-color: rgba(27,31,35,0.05);
            border-radius: 3px;
        }
        
        .blog-modal-content-body pre {
            word-wrap: normal;
            padding: 16px;
            overflow: auto;
            font-size: 85%;
            line-height: 1.45;
            background-color: #f6f8fa;
            border-radius: 3px;
        }
        
        .blog-modal-content-body pre code {
            display: inline;
            max-width: auto;
            padding: 0;
            margin: 0;
            overflow: visible;
            line-height: inherit;
            word-wrap: normal;
            background-color: transparent;
            border: 0;
        }
        
        .blog-modal-content-body blockquote {
            padding: 0 1em;
            color: #6a737d;
            border-left: 0.25em solid #dfe2e5;
            margin: 0 0 16px 0;
        }
        
        .blog-modal-content-body ul,
        .blog-modal-content-body ol {
            padding-left: 2em;
            margin-top: 0;
            margin-bottom: 16px;
        }
        
        .blog-modal-content-body img {
            max-width: 100%;
            box-sizing: content-box;
            background-color: #fff;
        }

        /* Contact Section */
        .contact-grid {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 3rem;
        }

        .contact-info {
            background: var(--white);
            padding: 2rem;
            border-radius: 10px;
            box-shadow: var(--shadow);
        }

        .contact-item {
            display: flex;
            align-items: center;
            margin-bottom: 1.5rem;
        }

        .contact-icon {
            background: var(--secondary-color);
            color: var(--white);
            width: 50px;
            height: 50px;
            border-radius: 50%;
            display: flex;
            align-items: center;
            justify-content: center;
            margin-right: 1rem;
        }

        .social-links {
            display: flex;
            gap: 1rem;
            justify-content: center;
            margin-top: 2rem;
        }

        .social-link {
            background: var(--primary-color);
            color: var(--white);
            width: 50px;
            height: 50px;
            border-radius: 50%;
            display: flex;
            align-items: center;
            justify-content: center;
            text-decoration: none;
            transition: var(--transition);
        }

        .social-link:hover {
            background: var(--secondary-color);
            transform: translateY(-3px);
        }

        /* Footer */
        .footer {
            background: var(--primary-color);
            color: var(--white);
            text-align: center;
            padding: 2rem 0;
        }

        /* Scroll to top button */
        .scroll-top {
            position: fixed;
            bottom: 20px;
            right: 20px;
            background: var(--secondary-color);
            color: var(--white);
            width: 50px;
            height: 50px;
            border: none;
            border-radius: 50%;
            cursor: pointer;
            font-size: 1.2rem;
            opacity: 0;
            visibility: hidden;
            transition: var(--transition);
            z-index: 1000;
        }

        .scroll-top.visible {
            opacity: 1;
            visibility: visible;
        }

        .scroll-top:hover {
            background: var(--primary-color);
            transform: translateY(-3px);
        }

        /* Animations */
        @keyframes slideIn {
            from { transform: translateX(100%); opacity: 0; }
            to { transform: translateX(0); opacity: 1; }
        }

        @keyframes slideOut {
            from { transform: translateX(0); opacity: 1; }
            to { transform: translateX(100%); opacity: 0; }
        }

        .slide-in {
            animation: slideIn 0.3s ease;
        }

        .slide-out {
            animation: slideOut 0.3s ease;
        }

        /* Responsive Design */
        @media (max-width: 768px) {
            .mobile-menu-toggle {
                display: block;
            }

            .nav-menu {
                display: none;
                position: absolute;
                top: 100%;
                left: 0;
                right: 0;
                background: var(--white);
                flex-direction: column;
                padding: 1rem;
                box-shadow: var(--shadow);
            }

            .nav-menu.active {
                display: flex;
            }

            .hero-title {
                font-size: 2.5rem;
            }

            .about-grid {
                grid-template-columns: 1fr;
                text-align: center;
            }

            .timeline::before {
                left: 20px;
            }

            .timeline-content {
                width: calc(100% - 60px);
                margin-left: 60px !important;
                margin-right: 0 !important;
            }

            .timeline-date {
                left: 20px;
                transform: translateX(-50%);
            }

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

            .cert-tabs {
                justify-content: center;
            }

            .projects-grid {
                grid-template-columns: 1fr;
            }
            
            .blog-modal-content {
                padding: 1rem;
                max-height: 85vh;
            }
            
            .blog-modal-close {
                top: 0.5rem;
                right: 0.5rem;
            }
        }

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

        /* Focus styles for accessibility */
        .nav-link:focus,
        .cta-button:focus,
        .cert-tab:focus,
        .social-link:focus {
            outline: 2px solid var(--secondary-color);
            outline-offset: 2px;
        }

        /* Print Styles */
        @media print {
            .header, .social-links, .cta-button, .scroll-top {
                display: none;
            }
            
            .section {
                padding: 2rem 0;
                opacity: 1;
                transform: none;
            }
            
            body {
                font-size: 12pt;
                line-height: 1.4;
            }
        }