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

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

        body {
            font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
            color: var(--text-dark);
            line-height: 1.6;
            scroll-behavior: smooth;
        }

        /* Navigation */
        nav {
            position: fixed;
            top: 0;
            width: 100%;
            background: rgba(255, 255, 255, 0.95);
            backdrop-filter: blur(10px);
            box-shadow: 0 1px 3px rgba(0, 0, 0, 0.1);
            z-index: 1000;
            transition: all 0.3s ease;
        }

        nav .container {
            max-width: 1200px;
            margin: 0 auto;
            padding: 1rem 2rem;
            display: flex;
            justify-content: space-between;
            align-items: center;
        }

        .logo {
            display: flex;
            align-items: center;
            gap: 0.5rem;
            font-size: 1.5rem;
            font-weight: 700;
            color: var(--primary-color);
            text-decoration: none;
        }

        .logo img {
            width: 40px;
            height: 40px;
        }

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

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

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

        .menu-toggle {
            display: none;
            flex-direction: column;
            gap: 5px;
            cursor: pointer;
        }

        .menu-toggle span {
            width: 25px;
            height: 3px;
            background: var(--text-dark);
            transition: all 0.3s ease;
        }

        /* Hero Section */
        #hero {
            padding: 120px 2rem 80px;
            text-align: center;
            background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
            color: white;
        }

        .hero-content {
            max-width: 800px;
            margin: 0 auto;
        }

        .profile-img {
            width: 200px;
            height: 200px;
            border-radius: 50%;
            object-fit: cover;
            border: 5px solid rgba(255, 255, 255, 0.3);
            margin-bottom: 2rem;
            box-shadow: 0 10px 30px rgba(0, 0, 0, 0.2);
        }

        #hero h1 {
            font-size: 3rem;
            font-weight: 700;
            margin-bottom: 1rem;
        }

        #hero p {
            font-size: 1.25rem;
            margin-bottom: 2rem;
            opacity: 0.95;
        }

        .social-links {
            display: flex;
            justify-content: center;
            gap: 1.5rem;
            margin-top: 2rem;
        }

        .social-links a {
            color: white;
            font-size: 1.5rem;
            transition: transform 0.3s ease, opacity 0.3s ease;
        }

        .social-links a:hover {
            transform: translateY(-3px);
            opacity: 0.8;
        }

        /* Section Styles */
        section {
            padding: 80px 2rem;
        }

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

        .section-title {
            text-align: center;
            font-size: 2.5rem;
            font-weight: 700;
            margin-bottom: 3rem;
            color: var(--text-dark);
            position: relative;
            padding-bottom: 1rem;
        }

        .section-title::after {
            content: '';
            position: absolute;
            bottom: 0;
            left: 50%;
            transform: translateX(-50%);
            width: 80px;
            height: 4px;
            background: var(--primary-color);
            border-radius: 2px;
        }

        /* About Section */
        #about {
            background: var(--bg-light);
        }

        .about-content {
            max-width: 800px;
            margin: 0 auto;
            text-align: center;
            font-size: 1.125rem;
            line-height: 1.8;
            color: var(--text-light);
        }

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

        .skill-card {
            background: var(--bg-white);
            padding: 2rem;
            border-radius: 12px;
            box-shadow: 0 2px 8px rgba(0, 0, 0, 0.08);
            transition: transform 0.3s ease, box-shadow 0.3s ease;
        }

        .skill-card:hover {
            transform: translateY(-5px);
            box-shadow: 0 8px 20px rgba(0, 0, 0, 0.12);
        }

        .skill-card i {
            font-size: 3rem;
            color: var(--primary-color);
            margin-bottom: 1rem;
        }

        .skill-card h3 {
            font-size: 1.5rem;
            margin-bottom: 1rem;
            color: var(--text-dark);
        }

        .skill-card p {
            color: var(--text-light);
            line-height: 1.6;
        }

        .skill-bar {
            margin-bottom: 1.5rem;
        }

        .skill-bar h4 {
            margin-bottom: 0.5rem;
            font-size: 1rem;
            font-weight: 600;
        }

        .progress {
            background: var(--bg-light);
            height: 10px;
            border-radius: 5px;
            overflow: hidden;
        }

        .progress-bar {
            height: 100%;
            background: linear-gradient(90deg, var(--primary-color), var(--hover-color));
            border-radius: 5px;
            transition: width 1s ease;
        }

        /* Projects Section */
        #projects {
            background: var(--bg-light);
        }

        .projects-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
            gap: 2rem;
        }

        .project-card {
            background: var(--bg-white);
            border-radius: 12px;
            padding: 2rem;
            box-shadow: 0 2px 8px rgba(0, 0, 0, 0.08);
            transition: transform 0.3s ease, box-shadow 0.3s ease;
        }

        .project-card:hover {
            transform: translateY(-5px);
            box-shadow: 0 8px 20px rgba(0, 0, 0, 0.12);
        }

        .project-icon {
            width: 80px;
            height: 80px;
            object-fit: contain;
            margin-bottom: 1.5rem;
            border-radius: 8px;
        }

        .project-card h3 {
            font-size: 1.5rem;
            margin-bottom: 1rem;
            color: var(--text-dark);
        }

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

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

        .tag {
            background: var(--bg-light);
            color: var(--primary-color);
            padding: 0.25rem 0.75rem;
            border-radius: 20px;
            font-size: 0.875rem;
            font-weight: 500;
        }

        .btn {
            display: inline-block;
            padding: 0.5rem 1.5rem;
            background: var(--primary-color);
            color: white;
            text-decoration: none;
            border-radius: 6px;
            font-weight: 500;
            transition: background 0.3s ease, transform 0.3s ease;
            margin-right: 0.5rem;
            margin-bottom: 0.5rem;
        }

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

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

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

        /* Education & Certifications */
        #education {
            background: var(--bg-white);
        }

        .timeline {
            max-width: 900px;
            margin: 0 auto;
        }

        .timeline-item {
            padding: 2rem;
            background: var(--bg-light);
            border-radius: 12px;
            margin-bottom: 2rem;
            border-left: 4px solid var(--primary-color);
        }

        .timeline-item h3 {
            font-size: 1.5rem;
            margin-bottom: 0.5rem;
            color: var(--text-dark);
        }

        .timeline-badge {
            display: inline-block;
            background: var(--primary-color);
            color: white;
            padding: 0.25rem 1rem;
            border-radius: 20px;
            font-size: 0.875rem;
            margin-bottom: 0.5rem;
        }

        .timeline-badge.success {
            background: #10b981;
        }

        .timeline-date {
            color: var(--text-light);
            font-size: 0.9rem;
            margin-bottom: 1rem;
        }

        .timeline-item p {
            color: var(--text-light);
            line-height: 1.6;
        }

        /* Contact Section */
        #contact {
            background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
            color: white;
            text-align: center;
        }

        #contact .section-title {
            color: white;
        }

        #contact .section-title::after {
            background: white;
        }

        .contact-info {
            max-width: 600px;
            margin: 0 auto;
        }

        .contact-item {
            display: flex;
            align-items: center;
            justify-content: center;
            gap: 1rem;
            margin-bottom: 1.5rem;
            font-size: 1.125rem;
        }

        .contact-item i {
            font-size: 1.5rem;
        }

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

        footer p {
            margin-bottom: 1rem;
        }

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

            nav ul {
                position: absolute;
                top: 100%;
                left: 0;
                right: 0;
                background: white;
                flex-direction: column;
                padding: 2rem;
                box-shadow: 0 4px 6px rgba(0, 0, 0, 0.1);
                display: none;
            }

            nav ul.active {
                display: flex;
            }

            #hero h1 {
                font-size: 2rem;
            }

            .section-title {
                font-size: 2rem;
            }

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

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

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