:root {
            --primary-color: #2563eb;
            --secondary-color: #1e40af;
            --accent-color: #3b82f6;
            --text-primary: #1f2937;
            --text-secondary: #6b7280;
            --bg-primary: #ffffff;
            --bg-secondary: #f9fafb;
            --bg-dark: #111827;
            --border-color: #e5e7eb;
        }

        [data-theme="dark"] {
            --text-primary: #f9fafb;
            --text-secondary: #d1d5db;
            --bg-primary: #111827;
            --bg-secondary: #1f2937;
            --border-color: #374151;
        }

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

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

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

        /* Header */
        header {
            position: fixed;
            top: 0;
            width: 100%;
            background: rgba(255, 255, 255, 0.95);
            backdrop-filter: blur(10px);
            border-bottom: 1px solid var(--border-color);
            z-index: 1000;
            transition: all 0.3s ease;
        }

        [data-theme="dark"] header {
            background: rgba(17, 24, 39, 0.95);
        }

        nav {
            display: flex;
            justify-content: space-between;
            align-items: center;
            padding: 1rem 0;
        }

        .logo {
            font-size: 1.5rem;
            font-weight: 700;
            color: var(--primary-color);
            text-decoration: none;
        }

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

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

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

        .theme-toggle {
            background: none;
            border: 2px solid var(--border-color);
            border-radius: 50%;
            width: 40px;
            height: 40px;
            cursor: pointer;
            display: flex;
            align-items: center;
            justify-content: center;
            transition: all 0.3s ease;
        }

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

        /* Mobile Menu */
        .mobile-menu-btn {
            display: none;
            background: none;
            border: none;
            font-size: 1.5rem;
            cursor: pointer;
            color: var(--text-primary);
        }

        /* Hero Section */
        .hero {
            min-height: 100vh;
            display: flex;
            align-items: center;
            padding-top: 80px;
            background: linear-gradient(135deg, var(--bg-primary) 0%, var(--bg-secondary) 100%);
        }

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

        .hero-text h1 {
            font-size: 3.5rem;
            font-weight: 700;
            margin-bottom: 1rem;
            background: linear-gradient(135deg, var(--primary-color), var(--accent-color));
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            background-clip: text;
        }

        .hero-text .tagline {
            font-size: 1.25rem;
            color: var(--text-secondary);
            margin-bottom: 2rem;
        }

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

        .btn {
            padding: 12px 24px;
            border-radius: 8px;
            text-decoration: none;
            font-weight: 600;
            transition: all 0.3s ease;
            display: inline-flex;
            align-items: center;
            gap: 0.5rem;
        }

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

        .btn-primary:hover {
            background: var(--secondary-color);
            transform: translateY(-2px);
        }

        .btn-secondary {
            background: transparent;
            color: var(--primary-color);
            border: 2px solid var(--primary-color);
        }

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

        .hero-image {
            display: flex;
            justify-content: center;
        }

        .profile-img {
            width: 300px;
            height: 300px;
            border-radius: 50%;
            object-fit: cover;
            border: 5px solid var(--primary-color);
            box-shadow: 0 20px 40px rgba(37, 99, 235, 0.2);
        }

        /* Section Styles */
        section {
            padding: 5rem 0;
        }

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

        .section-subtitle {
            text-align: center;
            font-size: 1.125rem;
            color: var(--text-secondary);
            margin-bottom: 4rem;
            max-width: 600px;
            margin-left: auto;
            margin-right: auto;
        }

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

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

        .stats {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 2rem;
            margin-top: 2rem;
        }

        .stat {
            text-align: center;
            padding: 1.5rem;
            background: var(--bg-secondary);
            border-radius: 12px;
        }

        .stat-number {
            font-size: 2rem;
            font-weight: 700;
            color: var(--primary-color);
        }

        .stat-label {
            color: var(--text-secondary);
            margin-top: 0.5rem;
        }

        /* Skills Section */
        .skills-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
            gap: 2rem;
        }

        .skill-category {
            background: var(--bg-secondary);
            padding: 2rem;
            border-radius: 12px;
            border: 1px solid var(--border-color);
        }

        .skill-category h3 {
            font-size: 1.25rem;
            font-weight: 600;
            margin-bottom: 1.5rem;
            color: var(--primary-color);
        }

        .skill-list {
            display: flex;
            flex-wrap: wrap;
            gap: 0.75rem;
        }

        .skill-tag {
            background: var(--primary-color);
            color: white;
            padding: 0.5rem 1rem;
            border-radius: 20px;
            font-size: 0.875rem;
            font-weight: 500;
        }

        /* Projects Section */
        .projects-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(350px, 1fr));
            gap: 2rem;
        }

        .project-card {
            background: var(--bg-secondary);
            border-radius: 12px;
            overflow: hidden;
            border: 1px solid var(--border-color);
            transition: transform 0.3s ease, box-shadow 0.3s ease;
        }

        .project-card:hover {
            transform: translateY(-5px);
            box-shadow: 0 20px 40px rgba(0, 0, 0, 0.1);
        }

        .project-image {
            height: 200px;
            background: linear-gradient(135deg, var(--primary-color), var(--accent-color));
            display: flex;
            align-items: center;
            justify-content: center;
            color: white;
            font-size: 3rem;
        }

        .project-content {
            padding: 1.5rem;
        }

        .project-title {
            font-size: 1.25rem;
            font-weight: 600;
            margin-bottom: 0.75rem;
        }

        .project-description {
            color: var(--text-secondary);
            margin-bottom: 1rem;
            line-height: 1.6;
        }

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

        .tech-tag {
            background: var(--bg-primary);
            color: var(--text-primary);
            padding: 0.25rem 0.75rem;
            border-radius: 15px;
            font-size: 0.75rem;
            border: 1px solid var(--border-color);
        }

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

        .project-links a {
            text-decoration: none;
            color: var(--primary-color);
            font-weight: 500;
            display: flex;
            align-items: center;
            gap: 0.5rem;
        }

        /* Contact Section */
        .contact-content {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 4rem;
            align-items: start;
        }

        .contact-form {
            background: var(--bg-secondary);
            padding: 2rem;
            border-radius: 12px;
            border: 1px solid var(--border-color);
        }

        .form-group {
            margin-bottom: 1.5rem;
        }

        .form-group label {
            display: block;
            margin-bottom: 0.5rem;
            font-weight: 500;
            color: var(--text-primary);
        }

        .form-group input,
        .form-group textarea {
            width: 100%;
            padding: 12px;
            border: 2px solid var(--border-color);
            border-radius: 8px;
            background: var(--bg-primary);
            color: var(--text-primary);
            font-family: inherit;
            transition: border-color 0.3s ease;
        }

        .form-group input:focus,
        .form-group textarea:focus {
            outline: none;
            border-color: var(--primary-color);
        }

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

        .contact-info h3 {
            font-size: 1.5rem;
            margin-bottom: 1.5rem;
            color: var(--text-primary);
        }

        .contact-item {
            display: flex;
            align-items: center;
            gap: 1rem;
            margin-bottom: 1.5rem;
            padding: 1rem;
            background: var(--bg-secondary);
            border-radius: 8px;
        }

        .contact-icon {
            width: 40px;
            height: 40px;
            background: var(--primary-color);
            color: white;
            border-radius: 50%;
            display: flex;
            align-items: center;
            justify-content: center;
        }

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

        .social-links a {
            width: 50px;
            height: 50px;
            background: var(--primary-color);
            color: white;
            border-radius: 50%;
            display: flex;
            align-items: center;
            justify-content: center;
            text-decoration: none;
            transition: transform 0.3s ease;
        }

        .social-links a:hover {
            transform: translateY(-3px);
        }

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

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

            .mobile-menu-btn {
                display: block;
            }

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

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

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

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

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

            .container {
                padding: 0 1rem;
            }
        }

        /* Animations */
        .fade-in {
            opacity: 0;
            transform: translateY(30px);
            transition: all 0.6s ease;
        }

        .fade-in.visible {
            opacity: 1;
            transform: translateY(0);
        }

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