/* CSS Variables */
        :root {
            --primary: #2563eb;     /* Tech blue */
            --secondary: #1e293b;   /* Dark blue gray */
            --accent: #8b5cf6;      /* Violet */
            --light: #f1f5f9;       /* Light gray */
            --dark: #0f172a;        /* Dark black */
            --success: #10b981;     /* Green */
            --transition: all 0.3s ease;
            --shadow: 0 4px 6px rgba(0,0,0,0.1);
            --border-radius: 8px;
        }

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

        body {
            font-family: 'Montserrat', Arial, sans-serif;
            line-height: 1.6;
            color: var(--dark);
            background-color: #fff;
            overflow-x: hidden;
        }

        a {
            text-decoration: none;
            color: inherit;
            transition: var(--transition);
        }

        ul {
            list-style: none;
        }

        img {
            max-width: 100%;
            height: auto;
            display: block;
        }

        .container {
            width: 100%;
            max-width: 1200px;
            margin: 0 auto;
            padding: 0 20px;
        }

        .btn {
            display: inline-block;
            padding: 12px 28px;
            background-color: var(--primary);
            color: white;
            border-radius: var(--border-radius);
            font-weight: 600;
            text-transform: uppercase;
            letter-spacing: 1px;
            transition: var(--transition);
            border: 2px solid var(--primary);
        }

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

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

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

        .section {
            padding: 80px 0;
        }

        .section-title {
            font-size: 2.5rem;
            margin-bottom: 20px;
            position: relative;
            padding-bottom: 15px;
            text-align: center;
        }

        .section-title::after {
            content: '';
            position: absolute;
            bottom: 0;
            left: 50%;
            transform: translateX(-50%);
            width: 70px;
            height: 4px;
            background-color: var(--accent);
            border-radius: 2px;
        }

        .section-subtitle {
            font-size: 1.2rem;
            color: var(--secondary);
            text-align: center;
            margin-bottom: 60px;
            max-width: 700px;
            margin-left: auto;
            margin-right: auto;
        }

        /* Header Styles */
        header {
            position: fixed;
            top: 0;
            left: 0;
            width: 100%;
            background-color: white;
            box-shadow: var(--shadow);
            z-index: 1000;
            transition: var(--transition);
        }

        .header-container {
            display: flex;
            justify-content: space-between;
            align-items: center;
            padding: 20px;
        }

        .logo {
            font-size: 1.8rem;
            font-weight: 700;
            color: var(--primary);
        }

        .logo span {
            color: var(--accent);
        }

        .nav-menu {
            display: flex;
            gap: 30px;
        }

        .nav-link {
            font-weight: 600;
            position: relative;
        }

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

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

        .nav-link.active {
            color: var(--accent);
        }

        .hamburger {
            display: none;
            cursor: pointer;
        }

        /* Hero Section */
        .hero {
            height: 100vh;
            display: flex;
            align-items: center;
            background: linear-gradient(135deg, rgba(37, 99, 235, 0.1) 0%, rgba(139, 92, 246, 0.1) 100%);
            position: relative;
            overflow: hidden;
        }

        .hero::before {
            content: '';
            position: absolute;
            top: -50px;
            right: -50px;
            width: 300px;
            height: 300px;
            border-radius: 50%;
            background: linear-gradient(135deg, var(--primary) 0%, var(--accent) 100%);
            opacity: 0.1;
        }

        .hero::after {
            content: '';
            position: absolute;
            bottom: -100px;
            left: -100px;
            width: 500px;
            height: 500px;
            border-radius: 50%;
            background: linear-gradient(135deg, var(--primary) 0%, var(--accent) 100%);
            opacity: 0.05;
        }

        .hero-content {
            position: relative;
            z-index: 2;
            max-width: 600px;
        }

        .hero-title {
            font-size: 3.5rem;
            margin-bottom: 20px;
            line-height: 1.2;
        }

        .hero-subtitle {
            font-size: 1.4rem;
            color: var(--secondary);
            margin-bottom: 30px;
        }

        .hero-btns {
            display: flex;
            gap: 15px;
        }

        /* Services Section */
        .services-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
            gap: 30px;
            margin-top: 50px;
        }

        .service-card {
            background: white;
            border-radius: var(--border-radius);
            box-shadow: var(--shadow);
            padding: 30px;
            transition: var(--transition);
            text-align: center;
        }

        .service-card:hover {
            transform: translateY(-10px);
            box-shadow: 0 10px 20px rgba(0,0,0,0.1);
        }

        .service-icon {
            width: 80px;
            height: 80px;
            background: linear-gradient(135deg, var(--primary) 0%, var(--accent) 100%);
            border-radius: 50%;
            display: flex;
            align-items: center;
            justify-content: center;
            margin: 0 auto 20px;
            font-size: 2rem;
            color: white;
        }

        .service-title {
            font-size: 1.5rem;
            margin-bottom: 15px;
        }

        .service-desc {
            color: var(--secondary);
            margin-bottom: 20px;
        }

        /* Portfolio Section */
        .portfolio-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
            gap: 25px;
            margin-top: 50px;
        }

        .portfolio-item {
            border-radius: var(--border-radius);
            overflow: hidden;
            position: relative;
            height: 300px;
            box-shadow: var(--shadow);
        }

        .portfolio-img {
            width: 100%;
            height: 100%;
            object-fit: cover;
            transition: var(--transition);
        }

        .portfolio-overlay {
            position: absolute;
            top: 0;
            left: 0;
            width: 100%;
            height: 100%;
            background: rgba(37, 99, 235, 0.8);
            display: flex;
            flex-direction: column;
            justify-content: center;
            align-items: center;
            color: white;
            opacity: 0;
            transition: var(--transition);
            padding: 20px;
            text-align: center;
        }

        .portfolio-item:hover .portfolio-overlay {
            opacity: 1;
        }

        .portfolio-item:hover .portfolio-img {
            transform: scale(1.1);
        }

        .portfolio-title {
            font-size: 1.5rem;
            margin-bottom: 10px;
        }

        /* Courses Section */
        .courses-table {
            width: 100%;
            border-collapse: collapse;
            margin-top: 40px;
            box-shadow: var(--shadow);
            border-radius: var(--border-radius);
            overflow: hidden;
        }

        .courses-table th,
        .courses-table td {
            padding: 15px;
            text-align: left;
            border-bottom: 1px solid var(--light);
        }

        .courses-table th {
            background-color: var(--primary);
            color: white;
            font-weight: 600;
        }

        .courses-table tr:nth-child(even) {
            background-color: rgba(241, 245, 249, 0.5);
        }

        .courses-table tr:hover {
            background-color: rgba(37, 99, 235, 0.05);
        }

        /* About Section */
        .about-container {
            display: flex;
            gap: 50px;
            align-items: center;
            margin-top: 50px;
        }

        .about-img {
            flex: 1;
            border-radius: var(--border-radius);
            overflow: hidden;
            box-shadow: var(--shadow);
        }

        .about-content {
            flex: 1;
        }

        .about-title {
            font-size: 2rem;
            margin-bottom: 20px;
            color: var(--primary);
        }

        .about-text {
            margin-bottom: 30px;
            color: var(--secondary);
            line-height: 1.8;
        }

        .skills-grid {
            display: grid;
            grid-template-columns: repeat(auto-fill, minmax(120px, 1fr));
            gap: 15px;
            margin-top: 30px;
        }

        .skill-item {
            background-color: var(--light);
            padding: 15px;
            border-radius: var(--border-radius);
            text-align: center;
            font-weight: 600;
            transition: var(--transition);
        }

        .skill-item:hover {
            background-color: var(--primary);
            color: white;
            transform: translateY(-5px);
        }

        /* Timeline */
        .timeline {
            position: relative;
            max-width: 800px;
            margin: 50px auto 0;
        }

        .timeline::after {
            content: '';
            position: absolute;
            width: 4px;
            background-color: var(--light);
            top: 0;
            bottom: 0;
            left: 50%;
            margin-left: -2px;
        }

        .timeline-event {
            padding: 20px 30px;
            position: relative;
            background-color: white;
            width: 40%;
            box-shadow: var(--shadow);
            border-radius: var(--border-radius);
            margin-bottom: 30px;
        }

        .timeline-event:nth-child(odd) {
            left: 0;
        }

        .timeline-event:nth-child(even) {
            left: 50%;
        }

        .timeline-event::after {
            content: '';
            position: absolute;
            width: 20px;
            height: 20px;
            background-color: white;
            border: 4px solid var(--accent);
            top: 30px;
            border-radius: 50%;
            z-index: 1;
        }

        .timeline-event:nth-child(odd)::after {
            right: -12px;
        }

        .timeline-event:nth-child(even)::after {
            left: -12px;
        }

        .event-year {
            font-size: 1.5rem;
            font-weight: 700;
            color: var(--accent);
            margin-bottom: 10px;
        }

        /* Contact Section */
        .contact-container {
            display: flex;
            gap: 50px;
            margin-top: 50px;
        }

        .contact-form {
            flex: 1;
        }

        .contact-info {
            flex: 1;
        }

        .form-group {
            margin-bottom: 25px;
        }

        .form-control {
            width: 100%;
            padding: 15px;
            border: 1px solid var(--light);
            border-radius: var(--border-radius);
            font-family: inherit;
            font-size: 1rem;
            transition: var(--transition);
        }

        .form-control:focus {
            border-color: var(--primary);
            outline: none;
            box-shadow: 0 0 0 3px rgba(37, 99, 235, 0.2);
        }

        textarea.form-control {
            height: 150px;
            resize: vertical;
        }

        .contact-cards {
            display: grid;
            grid-template-columns: repeat(auto-fill, minmax(250px, 1fr));
            gap: 20px;
            margin-top: 30px;
        }

        .contact-card {
            background-color: white;
            border-radius: var(--border-radius);
            box-shadow: var(--shadow);
            padding: 25px;
            text-align: center;
            transition: var(--transition);
        }

        .contact-card:hover {
            transform: translateY(-5px);
            box-shadow: 0 10px 20px rgba(0,0,0,0.1);
        }

        .contact-icon {
            font-size: 2.5rem;
            color: var(--primary);
            margin-bottom: 15px;
        }

        .contact-title {
            font-size: 1.3rem;
            margin-bottom: 10px;
        }

        .contact-detail {
            color: var(--secondary);
        }

        /* Footer */
        footer {
            background-color: var(--dark);
            color: white;
            padding: 60px 0 30px;
        }

        .footer-container {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
            gap: 40px;
            margin-bottom: 40px;
        }

        .footer-title {
            font-size: 1.3rem;
            margin-bottom: 20px;
            position: relative;
            padding-bottom: 10px;
        }

        .footer-title::after {
            content: '';
            position: absolute;
            bottom: 0;
            left: 0;
            width: 50px;
            height: 3px;
            background-color: var(--accent);
        }

        .footer-links {
            display: flex;
            flex-direction: column;
            gap: 10px;
        }

        .footer-link {
            color: #cbd5e1;
            transition: var(--transition);
        }

        .footer-link:hover {
            color: white;
            transform: translateX(5px);
        }

        .copyright {
            text-align: center;
            padding-top: 30px;
            border-top: 1px solid rgba(255,255,255,0.1);
            color: #94a3b8;
            font-size: 0.9rem;
        }

        /* Responsive Design */
        @media (max-width: 992px) {
            .hero-title {
                font-size: 3rem;
            }
            
            .about-container,
            .contact-container {
                flex-direction: column;
            }
            
            .timeline::after {
                left: 31px;
            }
            
            .timeline-event {
                width: 100%;
                padding-left: 70px;
                padding-right: 25px;
            }
            
            .timeline-event:nth-child(even) {
                left: 0;
            }
            
            .timeline-event::after {
                left: 20px;
            }
        }

        @media (max-width: 768px) {
            .nav-menu {
                position: fixed;
                top: 80px;
                left: -100%;
                width: 100%;
                flex-direction: column;
                background-color: white;
                box-shadow: 0 10px 10px rgba(0,0,0,0.1);
                padding: 20px;
                transition: var(--transition);
                gap: 15px;
            }
            
            .nav-menu.active {
                left: 0;
            }
            
            .hamburger {
                display: block;
            }
            
            .hero-title {
                font-size: 2.5rem;
            }
            
            .hero-btns {
                flex-direction: column;
            }
            
            .section {
                padding: 60px 0;
            }
            
            .section-title {
                font-size: 2rem;
            }
        }

        @media (max-width: 480px) {
            .hero-title {
                font-size: 2rem;
            }
            
            .section-title {
                font-size: 1.8rem;
            }
        }