:root {
            --primary: #0f172a;
            --secondary: #1e293b;
            --accent: #3b82f6;
            --accent-light: #60a5fa;
            --text-primary: #f8fafc;
            --text-secondary: #cbd5e1;
            --text-muted: #64748b;
            --surface: #334155;
            --surface-light: #475569;
            --gradient-1: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
            --gradient-2: linear-gradient(135deg, #f093fb 0%, #f5576c 100%);
            --gradient-3: linear-gradient(135deg, #4facfe 0%, #00f2fe 100%);
            --shadow: 0 25px 50px -12px rgba(0, 0, 0, 0.25);
            --shadow-lg: 0 35px 60px -12px rgba(0, 0, 0, 0.3);
        }

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

        body {
            font-family: 'Inter', sans-serif;
            background: var(--primary);
            color: var(--text-primary);
            line-height: 1.6;
            overflow-x: hidden;
        }

        /* Animated background */
        .bg-animation {
            position: fixed;
            top: 0;
            left: 0;
            width: 100%;
            height: 100%;
            z-index: -1;
            background: var(--primary);
        }

        .bg-animation::before {
            content: '';
            position: absolute;
            top: 0;
            left: 0;
            width: 100%;
            height: 100%;
            background-image: 
                radial-gradient(circle at 20% 20%, rgba(59, 130, 246, 0.1) 0%, transparent 50%),
                radial-gradient(circle at 80% 80%, rgba(139, 92, 246, 0.1) 0%, transparent 50%),
                radial-gradient(circle at 40% 60%, rgba(236, 72, 153, 0.1) 0%, transparent 50%);
            animation: float 20s ease-in-out infinite;
        }

        @keyframes float {
            0%, 100% { transform: translateY(0px) rotate(0deg); }
            33% { transform: translateY(-20px) rotate(1deg); }
            66% { transform: translateY(10px) rotate(-1deg); }
        }

        /* Navigation */
        .navbar {
            position: fixed;
            top: 0;
            left: 0;
            right: 0;
            z-index: 1000;
            padding: 1rem 2rem;
            background: rgba(15, 23, 42, 0.8);
            backdrop-filter: blur(20px);
            border-bottom: 1px solid rgba(255, 255, 255, 0.1);
            transition: all 0.3s ease;
        }

        .navbar.scrolled {
            background: rgba(15, 23, 42, 0.95);
            box-shadow: var(--shadow);
        }

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

        .logo {
            font-size: 1.5rem;
            font-weight: 800;
            background: var(--gradient-1);
            -webkit-background-clip: text;
            background-clip: text;
            -webkit-text-fill-color: transparent;
            text-decoration: none;
        }

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

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

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

        .nav-link:hover {
            color: var(--text-primary);
        }

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

        .mobile-menu {
            display: none;
            flex-direction: column;
            cursor: pointer;
        }

        .mobile-menu span {
            width: 25px;
            height: 3px;
            background: var(--text-primary);
            margin: 3px 0;
            transition: 0.3s;
        }

        /* Hero Section */
        .hero {
            min-height: 100vh;
            display: flex;
            align-items: center;
            justify-content: center;
            padding: 2rem;
            text-align: center;
            position: relative;
        }

        .hero-content {
            max-width: 800px;
            z-index: 10;
        }

        .hero-subtitle {
            color: var(--accent-light);
            font-size: 1.1rem;
            font-weight: 600;
            margin-bottom: 1rem;
            opacity: 0;
            animation: slideUp 1s ease 0.2s forwards;
        }

        .hero-title {
            font-size: clamp(3rem, 8vw, 5rem);
            font-weight: 800;
            line-height: 1.1;
            margin-bottom: 1.5rem;
            background: linear-gradient(135deg, var(--text-primary) 0%, var(--accent-light) 100%);
            -webkit-background-clip: text;
            background-clip: text;
            -webkit-text-fill-color: transparent;
            opacity: 0;
            animation: slideUp 1s ease 0.4s forwards;
        }

        @media (min-width: 769px) {
            .hero-title {
                white-space: nowrap;
                font-size: clamp(3rem, 6vw, 4.5rem);
            }
        }

        .hero-description {
            font-size: 1.3rem;
            color: var(--text-secondary);
            margin-bottom: 2.5rem;
            opacity: 0;
            animation: slideUp 1s ease 0.6s forwards;
        }

        .hero-cta {
            display: flex;
            gap: 1rem;
            justify-content: center;
            flex-wrap: wrap;
            opacity: 0;
            animation: slideUp 1s ease 0.8s forwards;
        }

        .btn {
            padding: 1rem 2rem;
            font-size: 1.1rem;
            font-weight: 600;
            text-decoration: none;
            border-radius: 50px;
            transition: all 0.3s ease;
            display: inline-flex;
            align-items: center;
            gap: 0.5rem;
        }

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

        .btn-primary:hover {
            background: transparent;
            color: var(--accent);
            transform: translateY(-2px);
            box-shadow: var(--shadow);
        }

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

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

        @keyframes slideUp {
            to {
                opacity: 1;
                transform: translateY(0);
            }
        }

        /* Sections */
        .section {
            padding: 5rem 2rem;
            max-width: 1200px;
            margin: 0 auto;
        }

        .section-title {
            font-size: 3rem;
            font-weight: 700;
            text-align: center;
            margin-bottom: 1rem;
            background: var(--gradient-1);
            -webkit-background-clip: text;
            background-clip: text;
            -webkit-text-fill-color: transparent;
        }

        .section-subtitle {
            color: var(--text-secondary);
            text-align: center;
            font-size: 1.2rem;
            margin-bottom: 4rem;
            max-width: 600px;
            margin-left: auto;
            margin-right: auto;
        }

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

        .about-image {
            position: relative;
        }

        .about-image img {
            width: 100%;
            border-radius: 20px;
            box-shadow: var(--shadow-lg);
        }

        .about-image::before {
            content: '';
            position: absolute;
            top: 20px;
            left: 20px;
            right: -20px;
            bottom: -20px;
            background: var(--gradient-1);
            border-radius: 20px;
            z-index: -1;
        }

        .about-content h3 {
            font-size: 2rem;
            margin-bottom: 1rem;
            color: var(--text-primary);
        }

        .about-content p {
            color: var(--text-secondary);
            margin-bottom: 2rem;
            font-size: 1.1rem;
        }

        .stats {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
            gap: 2rem;
            margin-top: 4rem;
        }

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

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

        .stat-number {
            font-size: 2.5rem;
            font-weight: 800;
            color: var(--accent-light);
            display: block;
        }

        .stat-label {
            color: var(--text-secondary);
            font-weight: 600;
        }

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

        .skill-category {
            background: var(--secondary);
            padding: 2rem;
            border-radius: 15px;
            border: 1px solid var(--surface);
            transition: all 0.3s ease;
        }

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

        .skill-category h3 {
            font-size: 1.5rem;
            margin-bottom: 1.5rem;
            color: var(--accent-light);
            display: flex;
            align-items: center;
            gap: 0.5rem;
        }

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

        .skill-tag {
            background: var(--surface);
            color: var(--text-primary);
            padding: 0.5rem 1rem;
            border-radius: 25px;
            font-size: 0.9rem;
            font-weight: 500;
        }

        /* Experience Section */
        .experience-timeline {
            position: relative;
            padding-left: 2rem;
        }

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

        .experience-item {
            position: relative;
            margin-bottom: 3rem;
            padding-left: 2rem;
        }

        .experience-item::before {
            content: '';
            position: absolute;
            left: -6px;
            top: 0;
            width: 12px;
            height: 12px;
            border-radius: 50%;
            background: var(--accent);
        }

        .experience-card {
            background: var(--secondary);
            padding: 2rem;
            border-radius: 15px;
            border: 1px solid var(--surface);
            transition: all 0.3s ease;
        }

        .experience-card:hover {
            transform: translateX(10px);
            box-shadow: var(--shadow);
        }

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

        .experience-title {
            font-size: 1.3rem;
            font-weight: 700;
            color: var(--text-primary);
        }

        .experience-company {
            color: var(--accent-light);
            font-weight: 600;
        }

        .experience-period {
            background: var(--surface);
            padding: 0.3rem 0.8rem;
            border-radius: 15px;
            font-size: 0.9rem;
            font-weight: 600;
            color: var(--text-primary);
        }

        .experience-description {
            color: var(--text-secondary);
            line-height: 1.7;
        }

        .experience-description ul {
            margin-left: 1rem;
            margin-top: 1rem;
        }

        .experience-description li {
            margin-bottom: 0.5rem;
        }

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

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

        .project-card::before {
            content: '';
            position: absolute;
            top: 0;
            left: 0;
            right: 0;
            height: 4px;
            background: var(--gradient-1);
        }

        .project-card:hover {
            transform: translateY(-10px);
            box-shadow: var(--shadow-lg);
        }

        .project-content {
            padding: 2rem;
        }

        .project-title {
            font-size: 1.5rem;
            font-weight: 700;
            margin-bottom: 1rem;
            color: var(--text-primary);
        }

        .project-description {
            color: var(--text-secondary);
            margin-bottom: 1.5rem;
            line-height: 1.7;
        }

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

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

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

        .certification-card {
            background: var(--secondary);
            padding: 1.5rem;
            border-radius: 15px;
            border: 1px solid var(--surface);
            transition: all 0.3s ease;
            display: flex;
            align-items: center;
            gap: 1rem;
        }

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

        .certification-icon {
            width: 50px;
            height: 50px;
            background: var(--gradient-1);
            border-radius: 12px;
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 1.5rem;
            color: white;
            flex-shrink: 0;
        }

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

        .certification-provider {
            color: var(--text-muted);
            font-size: 0.9rem;
        }

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

        .contact-card {
            background: var(--secondary);
            padding: 2rem;
            border-radius: 15px;
            border: 1px solid var(--surface);
            text-align: center;
            transition: all 0.3s ease;
            text-decoration: none;
            color: inherit;
        }

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

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

        .contact-title {
            font-weight: 600;
            margin-bottom: 0.5rem;
            color: var(--text-primary);
        }

        .contact-value {
            color: var(--text-secondary);
            font-size: 0.9rem;
        }

        /* Footer */
        .footer {
            background: var(--secondary);
            text-align: center;
            padding: 2rem;
            margin-top: 5rem;
            border-top: 1px solid var(--surface);
        }

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

        /* Responsive Design */
        @media (max-width: 768px) {
            .nav-menu {
                position: fixed;
                top: 70px;
                left: -100%;
                width: 100%;
                height: calc(100vh - 70px);
                background: rgba(15, 23, 42, 0.98);
                backdrop-filter: blur(20px);
                flex-direction: column;
                justify-content: flex-start;
                align-items: center;
                padding-top: 2rem;
                transition: left 0.3s ease;
                gap: 2rem;
                z-index: 999;
            }

            .nav-menu.active {
                left: 0;
            }

            .mobile-menu {
                display: flex;
            }

            .mobile-menu.active span:nth-child(1) {
                transform: rotate(-45deg) translate(-5px, 6px);
            }

            .mobile-menu.active span:nth-child(2) {
                opacity: 0;
            }

            .mobile-menu.active span:nth-child(3) {
                transform: rotate(45deg) translate(-5px, -6px);
            }

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

            .experience-timeline {
                padding-left: 1rem;
            }

            .experience-item {
                padding-left: 1.5rem;
            }

            .experience-header {
                flex-direction: column;
                align-items: flex-start;
            }

            .hero-cta {
                flex-direction: column;
                align-items: center;
            }

            .btn {
                width: 100%;
                max-width: 300px;
                justify-content: center;
            }
        }

        @media (max-width: 480px) {
            .section {
                padding: 3rem 1rem;
            }

            .navbar {
                padding: 1rem;
            }

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

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

        /* Scroll animations */
        .animate-on-scroll {
            opacity: 0;
            transform: translateY(30px);
            transition: all 0.6s ease;
        }

        .animate-on-scroll.animated {
            opacity: 1;
            transform: translateY(0);
        }