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

        :root {
            --primary: #ff6b6b;
            --secondary: #4ecdc4;
            --accent: #45b7d1;
            --purple: #9b59b6;
            --orange: #f39c12;
            --text: #2c3e50;
            --text-light: #7f8c8d;
            --bg: #ffffff;
            --bg-secondary: #f8f9fa;
            --bg-dark: #1a1a2e;
            --border: #e1e8ed;
        }

        [data-theme="dark"] {
            --text: #ecf0f1;
            --text-light: #bdc3c7;
            --bg: #16213e;
            --bg-secondary: #1a1a2e;
            --bg-dark: #0f0f23;
            --border: #34495e;
        }

        body {
            font-family: 'SF Pro Display', -apple-system, BlinkMacSystemFont, sans-serif;
            line-height: 1.6;
            color: var(--text);
            background-color: var(--bg);
            overflow-x: hidden;
            transition: all 0.3s ease;
        }

        /* Navigation */
        .navbar {
            position: fixed;
            top: 0;
            width: 100%;
            background: rgba(255, 255, 255, 0.95);
            backdrop-filter: blur(20px);
            z-index: 1000;
            padding: 1rem 0;
            transition: all 0.3s ease;
        }

        [data-theme="dark"] .navbar {
            background: rgba(22, 33, 62, 0.95);
        }

        .navbar.scrolled {
            background: rgba(255, 255, 255, 0.98);
            box-shadow: 0 8px 32px rgba(31, 38, 135, 0.15);
        }

        [data-theme="dark"] .navbar.scrolled {
            background: rgba(22, 33, 62, 0.98);
            box-shadow: 0 8px 32px rgba(0, 0, 0, 0.3);
        }

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

        .logo {
            font-size: 1.8rem;
            font-weight: 800;
            background: linear-gradient(135deg, var(--primary), var(--secondary));
            -webkit-background-clip: text;
            background-clip: text;
            -webkit-text-fill-color: transparent;
        }

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

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

        .nav-links a {
            text-decoration: none;
            color: var(--text);
            font-weight: 600;
            transition: all 0.3s ease;
            position: relative;
            padding: 0.5rem 0;
        }

        .nav-links a::after {
            content: '';
            position: absolute;
            bottom: 0;
            left: 0;
            width: 0;
            height: 3px;
            background: linear-gradient(135deg, var(--primary), var(--secondary));
            transition: width 0.3s ease;
            border-radius: 2px;
        }

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

        .theme-toggle {
            background: var(--bg-secondary);
            border: 2px solid var(--border);
            color: var(--text);
            border-radius: 50%;
            width: 45px;
            height: 45px;
            display: flex;
            align-items: center;
            justify-content: center;
            cursor: pointer;
            font-size: 1.3rem;
            transition: all 0.3s ease;
        }

        .theme-toggle:hover {
            border-color: var(--primary);
            transform: rotate(180deg) scale(1.1);
        }

        /* Hero Section */
        .hero {
            min-height: 100vh;
            display: flex;
            align-items: center;
            background: linear-gradient(135deg, #667eea 0%, #764ba2 50%, #f093fb 100%);
            position: relative;
            overflow: hidden;
            padding-top: 80px;
        }

        .hero::before {
            content: '';
            position: absolute;
            top: 0;
            left: 0;
            right: 0;
            bottom: 0;
            background: url('data:image/svg+xml,<svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 100 100"><defs><pattern id="neural" width="20" height="20" patternUnits="userSpaceOnUse"><circle cx="10" cy="10" r="1" fill="white" opacity="0.1"/><line x1="5" y1="5" x2="15" y2="15" stroke="white" stroke-width="0.5" opacity="0.1"/></pattern></defs><rect width="100" height="100" fill="url(%23neural)"/></svg>');
        }

        .hero-container {
            max-width: 1200px;
            margin: 0 auto;
            padding: 0 2rem;
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 4rem;
            align-items: center;
            position: relative;
            z-index: 1;
        }

        .hero-content h1 {
            font-size: 4rem;
            font-weight: 900;
            color: white;
            margin-bottom: 1rem;
            line-height: 1.1;
        }

        .hero-content .subtitle {
            font-size: 1.8rem;
            color: rgba(255, 255, 255, 0.9);
            margin-bottom: 1rem;
            font-weight: 600;
        }

        .hero-content .specialties {
            display: flex;
            flex-wrap: wrap;
            gap: 0.5rem;
            margin-bottom: 2rem;
        }

        .specialty-tag {
            background: rgba(255, 255, 255, 0.2);
            color: white;
            padding: 0.5rem 1rem;
            border-radius: 25px;
            font-size: 0.9rem;
            font-weight: 500;
            backdrop-filter: blur(10px);
        }

        .hero-content p {
            font-size: 1.2rem;
            color: rgba(255, 255, 255, 0.8);
            margin-bottom: 2.5rem;
            line-height: 1.6;
        }

        .cta-buttons {
            display: flex;
            gap: 1rem;
            flex-wrap: wrap;
        }

        .btn {
            padding: 1rem 2rem;
            border: none;
            border-radius: 50px;
            font-weight: 700;
            text-decoration: none;
            display: inline-flex;
            align-items: center;
            gap: 0.5rem;
            transition: all 0.3s ease;
            cursor: pointer;
            font-size: 1rem;
        }

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

        .btn-primary:hover {
            transform: translateY(-3px);
            box-shadow: 0 15px 35px rgba(0, 0, 0, 0.2);
        }

        .btn-secondary {
            background: transparent;
            color: white;
            border: 2px solid white;
        }

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

        /* Neural Network Visualization */
        .hero-visual {
            position: relative;
            display: flex;
            justify-content: center;
            align-items: center;
            margin: 0 auto;
        }

        .neural-network {
            width: 400px;
            height: 400px;
            position: relative;
        }

        .neural-node {
            position: absolute;
            width: 20px;
            height: 20px;
            background: rgba(255, 255, 255, 0.9);
            border-radius: 50%;
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 10px;
            animation: pulse 2s infinite;
        }

        .neural-connection {
            position: absolute;
            height: 2px;
            background: rgba(255, 255, 255, 0.4);
            transform-origin: left center;
            animation: data-flow 3s infinite;
        }

        @keyframes pulse {
            0%, 100% { transform: scale(1); opacity: 0.7; }
            50% { transform: scale(1.2); opacity: 1; }
        }

        @keyframes data-flow {
            0% { box-shadow: 0 0 0 rgba(255, 255, 255, 0.8); }
            50% { box-shadow: 20px 0 20px rgba(255, 255, 255, 0.8); }
            100% { box-shadow: 0 0 0 rgba(255, 255, 255, 0.8); }
        }

        /* Sections */
        .section {
            padding: 6rem 0;
            scroll-margin-top: 80px;
        }

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

        .section-title {
            font-size: 3rem;
            font-weight: 800;
            text-align: center;
            margin-bottom: 4rem;
            background: linear-gradient(135deg, var(--primary), var(--secondary));
            -webkit-background-clip: text;
            background-clip: text;
            -webkit-text-fill-color: transparent;
        }

        /* About Section */
        .about {
            background: var(--bg-secondary);
        }

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

        .about-visual {
            position: relative;
            display: flex;
            justify-content: center;
        }

        .profile-photo {
            position: relative;
            width: 300px;
            height: 300px;
            border-radius: 20px;
            overflow: hidden;
            box-shadow: 0 20px 40px rgba(0, 0, 0, 0.15);
            transition: all 0.3s ease;
            cursor: pointer;
        }

        .profile-photo:hover {
            transform: translateY(-10px);
            box-shadow: 0 30px 60px rgba(0, 0, 0, 0.2);
        }

        .profile-photo img {
            width: 100%;
            height: 100%;
            object-fit: cover;
            transition: all 0.3s ease;
        }

        .photo-overlay {
            position: absolute;
            top: 0;
            left: 0;
            right: 0;
            bottom: 0;
            background: rgba(99, 102, 241, 0.9);
            display: flex;
            align-items: center;
            justify-content: center;
            opacity: 0;
            transition: opacity 0.3s ease;
            color: white;
            font-weight: 600;
            text-align: center;
            padding: 1rem;
        }

        .profile-photo:hover .photo-overlay {
            opacity: 1;
        }

        [data-theme="dark"] .profile-photo {
            box-shadow: 0 20px 40px rgba(0, 0, 0, 0.4);
        }

        [data-theme="dark"] .profile-photo:hover {
            box-shadow: 0 30px 60px rgba(0, 0, 0, 0.6);
        }

        .about-text h3 {
            font-size: 2rem;
            margin-bottom: 1.5rem;
            color: var(--text);
            font-weight: 700;
        }

        .about-text p {
            color: var(--text-light);
            margin-bottom: 1.5rem;
            font-size: 1.1rem;
            line-height: 1.7;
        }

        .ml-skills {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
            gap: 1.5rem;
            margin-top: 2rem;
        }

        .skill-category {
            background: var(--bg);
            padding: 1.5rem;
            border-radius: 15px;
            border: 1px solid var(--border);
            transition: all 0.3s ease;
        }

        .skill-category:hover {
            transform: translateY(-5px);
            box-shadow: 0 10px 30px rgba(0, 0, 0, 0.1);
        }

        .skill-category h4 {
            color: var(--primary);
            margin-bottom: 1rem;
            font-weight: 700;
        }

        .skill-tags {
            display: flex;
            flex-wrap: wrap;
            gap: 0.5rem;
        }

        .skill-tag {
            background: var(--bg-secondary);
            color: var(--text);
            padding: 0.4rem 0.8rem;
            border-radius: 20px;
            font-size: 0.85rem;
            font-weight: 500;
        }

        /* Projects Section */
        .projects-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(400px, 1fr));
            gap: 2.5rem;
        }

        .project-card {
            background: var(--bg);
            border-radius: 20px;
            padding: 2.5rem;
            box-shadow: 0 10px 40px rgba(0, 0, 0, 0.1);
            transition: all 0.4s ease;
            border: 1px solid var(--border);
            position: relative;
            overflow: hidden;
        }

        .project-card::before {
            content: '';
            position: absolute;
            top: 0;
            left: 0;
            right: 0;
            height: 4px;
            background: linear-gradient(135deg, var(--primary), var(--secondary));
        }

        [data-theme="dark"] .project-card {
            box-shadow: 0 10px 40px rgba(0, 0, 0, 0.3);
        }

        .project-card:hover {
            transform: translateY(-10px);
            box-shadow: 0 25px 50px rgba(0, 0, 0, 0.15);
        }

        [data-theme="dark"] .project-card:hover {
            box-shadow: 0 25px 50px rgba(0, 0, 0, 0.4);
        }

        .project-header {
            display: flex;
            align-items: center;
            gap: 1rem;
            margin-bottom: 1.5rem;
        }

        .project-icon {
            width: 60px;
            height: 60px;
            background: linear-gradient(135deg, var(--primary), var(--secondary));
            border-radius: 15px;
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 1.8rem;
        }

        .project-card h3 {
            font-size: 1.6rem;
            margin: 0;
            color: var(--text);
            font-weight: 700;
        }

        .project-type {
            background: var(--accent);
            color: white;
            padding: 0.3rem 0.8rem;
            border-radius: 15px;
            font-size: 0.8rem;
            font-weight: 600;
            margin-left: auto;
        }

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

        .project-metrics {
            display: flex;
            gap: 1rem;
            margin-bottom: 1.5rem;
        }

        .metric {
            text-align: center;
        }

        .metric-value {
            font-size: 1.5rem;
            font-weight: 700;
            color: var(--primary);
        }

        .metric-label {
            font-size: 0.8rem;
            color: var(--text-light);
            font-weight: 500;
        }

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

        .tech-tag {
            background: var(--bg-secondary);
            color: var(--text);
            padding: 0.4rem 0.8rem;
            border-radius: 15px;
            font-size: 0.8rem;
            font-weight: 500;
        }

        .project-links {
            display: flex;
            gap: 1rem;
        }

        .project-link {
            padding: 0.7rem 1.5rem;
            border-radius: 25px;
            text-decoration: none;
            font-weight: 600;
            transition: all 0.3s ease;
            font-size: 0.9rem;
        }

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

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

        .project-link:hover {
            transform: translateY(-2px);
        }

        /* Interactive Chart Section */
        .chart-section {
            background: var(--bg-secondary);
        }

        .chart-container {
            background: var(--bg);
            border-radius: 20px;
            padding: 2rem;
            box-shadow: 0 10px 30px rgba(0, 0, 0, 0.1);
            border: 1px solid var(--border);
        }

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

        .chart-btn {
            padding: 0.7rem 1.5rem;
            border: 2px solid var(--primary);
            background: transparent;
            color: var(--primary);
            border-radius: 25px;
            cursor: pointer;
            font-weight: 600;
            transition: all 0.3s ease;
        }

        .chart-btn.active,
        .chart-btn:hover {
            background: var(--primary);
            color: white;
        }

        .chart-display {
            width: 100%;
            height: 400px;
            background: var(--bg-secondary);
            border-radius: 15px;
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 1.2rem;
            color: var(--text-light);
        }

        /* Contact Section */
        .contact {
            background: var(--bg-dark);
            color: white;
        }

        .contact .section-title {
            color: white;
            background: linear-gradient(135deg, var(--accent), var(--secondary));
            background-clip: text;
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
        }

        .contact-content {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 4rem;
        }

        .contact-info h3 {
            font-size: 1.8rem;
            margin-bottom: 1rem;
            font-weight: 700;
        }

        .contact-info p {
            color: rgba(255, 255, 255, 0.8);
            margin-bottom: 2rem;
            font-size: 1.1rem;
            line-height: 1.6;
        }

        .contact-links {
            display: flex;
            flex-direction: column;
            gap: 1rem;
        }

        .contact-link {
            display: flex;
            align-items: center;
            gap: 1rem;
            color: rgba(255, 255, 255, 0.8);
            text-decoration: none;
            transition: all 0.3s ease;
            padding: 0.5rem 0;
            font-weight: 500;
        }

        .contact-link:hover {
            color: var(--accent);
            transform: translateX(10px);
        }

        .contact-form {
            display: flex;
            flex-direction: column;
            gap: 1.5rem;
        }

        .form-group {
            display: flex;
            flex-direction: column;
            gap: 0.5rem;
        }

        .form-group label {
            font-weight: 600;
            color: rgba(255, 255, 255, 0.9);
        }

        .form-group input,
        .form-group textarea {
            padding: 1rem;
            border: 2px solid rgba(255, 255, 255, 0.2);
            border-radius: 15px;
            background: rgba(255, 255, 255, 0.1);
            color: white;
            font-family: inherit;
            transition: all 0.3s ease;
        }

        .form-group input:focus,
        .form-group textarea:focus {
            outline: none;
            border-color: var(--accent);
            background: rgba(255, 255, 255, 0.15);
        }

        .form-group input::placeholder,
        .form-group textarea::placeholder {
            color: rgba(255, 255, 255, 0.6);
        }

        .form-group textarea {
            resize: vertical;
            min-height: 120px;
        }

        /* Footer */
        .footer {
            background: var(--bg-dark);
            color: white;
            padding: 2rem 0;
            text-align: center;
            border-top: 1px solid rgba(255, 255, 255, 0.1);
        }

        /* Mobile Responsiveness */
        @media (max-width: 768px) {
            .nav-links {
                display: none;
            }

            .hero-container {
                grid-template-columns: 1fr;
                text-align: center;
                gap: 2rem;
            }

            .hero-content h1 {
                font-size: 2.5rem;
            }

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

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

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

            .ml-skills {
                grid-template-columns: 1fr;
            }

            .neural-network {
                width: 300px;
                height: 300px;
            }
        }

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

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

        .fade-in {
            animation: fadeInUp 0.6s ease forwards;
        }