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

        :root {
            --primary-bg: #0f1419;
            --secondary-bg: #1a1f2e;
            --accent-primary: #00d9ff;
            --accent-secondary: #00a8cc;
            --text-primary: #ffffff;
            --text-secondary: #b0b8c1;
            --border-color: #2a3142;
        }

        html {
            scroll-behavior: smooth;
        }

        body {
            font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen, Ubuntu, Cantarell, sans-serif;
            background-color: var(--primary-bg);
            color: var(--text-primary);
            line-height: 1.6;
            overflow-x: hidden;
        }

        /* Header & Navigation */
        header {
            position: fixed;
            top: 0;
            width: 100%;
            z-index: 1000;
            background: rgba(15, 20, 25, 0.8);
            backdrop-filter: blur(10px);
            border-bottom: 1px solid var(--border-color);
            padding: 1.5rem 2rem;
            display: flex;
            justify-content: space-between;
            align-items: center;
            animation: slideDown 0.6s ease-out;
        }

        @keyframes slideDown {
            from {
                opacity: 0;
                transform: translateY(-30px);
            }
            to {
                opacity: 1;
                transform: translateY(0);
            }
        }

        .logo {
            font-size: 1.8rem;
            font-weight: 700;
            background: linear-gradient(135deg, var(--accent-primary), var(--accent-secondary));
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            background-clip: text;
        }

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

        nav a {
            color: var(--text-secondary);
            text-decoration: none;
            font-size: 0.95rem;
            font-weight: 500;
            transition: all 0.3s ease;
            position: relative;
        }

        nav a:hover,
        nav a.active {
            color: var(--accent-primary);
        }

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

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

        /* Main Sections */
        main {
            margin-top: 70px;
        }

        section {
            min-height: 100vh;
            display: flex;
            align-items: center;
            padding: 4rem 2rem;
            max-width: 1200px;
            margin: 0 auto;
        }

        /* Hero Section */
        .hero {
            display: flex;
            flex-direction: column;
            justify-content: center;
            align-items: flex-start;
            animation: fadeInUp 1s ease-out;
        }

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

        .hero-content h1 {
            font-size: 4rem;
            line-height: 1.2;
            margin-bottom: 1rem;
            font-weight: 800;
        }

        .hero-content .subtitle {
            font-size: 1.3rem;
            color: var(--text-secondary);
            margin-bottom: 2rem;
            max-width: 600px;
        }

        .hero-content p {
            font-size: 1.05rem;
            color: var(--text-secondary);
            max-width: 600px;
            margin-bottom: 2.5rem;
            line-height: 1.8;
        }

        .cta-buttons {
            display: flex;
            gap: 1.5rem;
            flex-wrap: wrap;
        }

        .btn {
            padding: 0.75rem 2rem;
            border-radius: 50px;
            font-size: 1rem;
            font-weight: 600;
            cursor: pointer;
            border: none;
            transition: all 0.3s ease;
            text-decoration: none;
            display: inline-block;
        }

        .btn-primary {
            background: linear-gradient(135deg, var(--accent-primary), var(--accent-secondary));
            color: var(--primary-bg);
            box-shadow: 0 0 30px rgba(0, 217, 255, 0.3);
        }

        .btn-primary:hover {
            transform: translateY(-3px);
            box-shadow: 0 0 40px rgba(0, 217, 255, 0.5);
        }

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

        .btn-secondary:hover {
            background: rgba(0, 217, 255, 0.1);
            transform: translateY(-3px);
        }

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

        .about-content h2,
        .skills-content h2,
        .projects-content h2,
        .contact-content h2 {
            font-size: 3rem;
            margin-bottom: 1.5rem;
        }

        .about-content p {
            color: var(--text-secondary);
            margin-bottom: 1.5rem;
            line-height: 1.8;
        }

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

        .stat {
            text-align: center;
            padding: 1.5rem;
            border-radius: 15px;
            background: var(--secondary-bg);
            border: 1px solid var(--border-color);
        }

        .stat-number {
            font-size: 2.5rem;
            font-weight: 700;
            color: var(--accent-primary);
            margin-bottom: 0.5rem;
        }

        .stat-label {
            color: var(--text-secondary);
            font-size: 0.95rem;
        }

        /* Skills Section */
        .skills {
            display: flex;
            flex-direction: column;
        }

        .skills-content h2 {
            margin-bottom: 3rem;
        }

        .skills-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(150px, 1fr));
            gap: 1.5rem;
        }

        .skill-card {
            padding: 2rem;
            background: var(--secondary-bg);
            border: 1px solid var(--border-color);
            border-radius: 15px;
            text-align: center;
            transition: all 0.3s ease;
            cursor: pointer;
        }

        .skill-card:hover {
            border-color: var(--accent-primary);
            background: rgba(0, 217, 255, 0.05);
            transform: translateY(-5px);
            box-shadow: 0 10px 30px rgba(0, 217, 255, 0.15);
        }

        .skill-icon {
            font-size: 3rem;
            margin-bottom: 1rem;
        }

        .skill-name {
            font-weight: 600;
            color: var(--text-primary);
        }

        /* Projects Section */
        .projects {
            display: flex;
            flex-direction: column;
        }

        .projects-content h2 {
            margin-bottom: 3rem;
        }

        .projects-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
            gap: 2rem;
        }

        .project-card {
            background: var(--secondary-bg);
            border: 1px solid var(--border-color);
            border-radius: 15px;
            overflow: hidden;
            transition: all 0.3s ease;
        }

        .project-card:hover {
            border-color: var(--accent-primary);
            transform: translateY(-10px);
            box-shadow: 0 15px 40px rgba(0, 217, 255, 0.2);
        }

        .project-image {
            width: 100%;
            height: 200px;
            background: linear-gradient(135deg, rgba(0, 217, 255, 0.1), rgba(0, 168, 204, 0.1));
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 3rem;
        }

        .project-info {
            padding: 2rem;
        }

        .project-title {
            font-size: 1.3rem;
            font-weight: 700;
            margin-bottom: 0.5rem;
            color: var(--text-primary);
        }

        .project-description {
            color: var(--text-secondary);
            font-size: 0.95rem;
            margin-bottom: 1.5rem;
            line-height: 1.6;
        }

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

        .tag {
            display: inline-block;
            padding: 0.4rem 0.8rem;
            background: rgba(0, 217, 255, 0.1);
            color: var(--accent-primary);
            border-radius: 20px;
            font-size: 0.8rem;
            font-weight: 500;
            border: 1px solid rgba(0, 217, 255, 0.3);
        }

        /* Contact Section */
        .contact {
            display: flex;
            flex-direction: column;
            align-items: center;
            text-align: center;
        }

        .contact-content {
            max-width: 700px;
            margin-bottom: 3rem;
        }

        .contact-content h2 {
            margin-bottom: 1rem;
        }

        .contact-content p {
            color: var(--text-secondary);
            font-size: 1.05rem;
            margin-bottom: 2rem;
            line-height: 1.8;
        }

        .contact-form {
            width: 100%;
            max-width: 600px;
            display: flex;
            flex-direction: column;
            gap: 1.5rem;
        }

        .form-group {
            display: flex;
            flex-direction: column;
            align-items: flex-start;
        }

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

        .form-group input,
        .form-group textarea {
            width: 100%;
            padding: 0.75rem 1rem;
            background: var(--secondary-bg);
            border: 1px solid var(--border-color);
            border-radius: 8px;
            color: var(--text-primary);
            font-family: inherit;
            font-size: 1rem;
            transition: all 0.3s ease;
        }

        .form-group input:focus,
        .form-group textarea:focus {
            outline: none;
            border-color: var(--accent-primary);
            background: rgba(0, 217, 255, 0.05);
            box-shadow: 0 0 20px rgba(0, 217, 255, 0.2);
        }

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

        /* Social Links */
        .social-links {
            display: flex;
            gap: 1.5rem;
            margin-top: 2rem;
            justify-content: center;
            flex-wrap: wrap;
        }

        .social-link {
            width: 50px;
            height: 50px;
            display: flex;
            align-items: center;
            justify-content: center;
            background: var(--secondary-bg);
            border: 1px solid var(--border-color);
            border-radius: 50%;
            color: var(--text-secondary);
            text-decoration: none;
            font-size: 1.2rem;
            transition: all 0.3s ease;
        }

        .social-link:hover {
            background: linear-gradient(135deg, var(--accent-primary), var(--accent-secondary));
            border-color: var(--accent-primary);
            color: var(--primary-bg);
            transform: translateY(-5px);
        }

        /* Footer */
        footer {
            background: var(--secondary-bg);
            border-top: 1px solid var(--border-color);
            padding: 2rem;
            text-align: center;
            color: var(--text-secondary);
            font-size: 0.9rem;
        }

        /* Scroll to Top Button */
        .scroll-top {
            position: fixed;
            bottom: 2rem;
            right: 2rem;
            width: 50px;
            height: 50px;
            background: linear-gradient(135deg, var(--accent-primary), var(--accent-secondary));
            color: var(--primary-bg);
            border: none;
            border-radius: 50%;
            cursor: pointer;
            display: none;
            align-items: center;
            justify-content: center;
            font-size: 1.5rem;
            z-index: 999;
            transition: all 0.3s ease;
            box-shadow: 0 0 30px rgba(0, 217, 255, 0.3);
        }

        .scroll-top:hover {
            transform: translateY(-3px);
            box-shadow: 0 0 40px rgba(0, 217, 255, 0.5);
        }

        .scroll-top.show {
            display: flex;
        }

        /* Responsive */
        @media (max-width: 768px) {
            nav {
                gap: 1rem;
                font-size: 0.85rem;
            }

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

            .about {
                grid-template-columns: 1fr;
                gap: 2rem;
            }

            .about-stats {
                grid-template-columns: repeat(2, 1fr);
            }

            .hero-content .subtitle {
                font-size: 1.1rem;
            }

            .about-content h2,
            .skills-content h2,
            .projects-content h2,
            .contact-content h2 {
                font-size: 2rem;
            }

            section {
                padding: 3rem 1.5rem;
            }

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

        @media (max-width: 480px) {
            header {
                padding: 1rem;
            }

            .logo {
                font-size: 1.3rem;
            }

            nav {
                gap: 0.5rem;
            }

            nav a {
                font-size: 0.8rem;
            }

            .hero-content h1 {
                font-size: 1.8rem;
            }

            .cta-buttons {
                gap: 0.8rem;
            }

            .btn {
                padding: 0.6rem 1.2rem;
                font-size: 0.9rem;
            }

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

            .stat {
                padding: 1rem;
            }
        }