:root {
            --primary: #003366; 
            --accent: #00E676;  
            --text: #333;
            --bg: #F4F7F6;
        }

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

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

        nav {
            background: var(--primary);
            color: white;
            padding: 1rem;
            position: fixed;
            width: 100%;
            top: 0;
            z-index: 1000;
            display: flex;
            justify-content: space-around;
        }

        nav a {
            color: white;
            text-decoration: none;
            font-weight: 600;
            font-size: 0.9rem;
            transition: color 0.3s;
        }

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

        header {
            height: 60vh;
            display: flex;
            flex-direction: column;
            justify-content: center;
            align-items: center;
            text-align: center;
            padding: 2rem;
            margin-top: 50px;
            background: linear-gradient(rgba(0,51,102,0.8), rgba(0,51,102,0.8)), url('https://img.freepik.com/premium-photo/website-banner-mixed-media-iot-internet-things-concepts-ict-information-telecommunication-technology_161452-5544.jpg?w=2000');
            background-size: cover;
            color: white;
        }

        h1 { font-family: 'JetBrains Mono', monospace; font-size: 2.5rem; }

        section { padding: 4rem 2rem; max-width: 900px; margin: auto; }
        h2 { border-left: 5px solid var(--accent); padding-left: 1rem; margin-bottom: 2rem; color: var(--primary); }

        .profile-img { width: 150px; border-radius: 50%; margin-bottom: 1rem; border: 3px solid var(--accent); }

        table {
            width: 100%;
            border-collapse: collapse;
            margin: 2rem 0;
            background: white;
            box-shadow: 0 4px 6px rgba(0,0,0,0.1);
        }

        th, td { padding: 1rem; border: 1px solid #ddd; text-align: left; }
        th { background-color: var(--primary); color: white; }

        .btn {
            display: inline-block;
            background: var(--accent);
            color: var(--primary);
            padding: 0.8rem 1.5rem;
            text-decoration: none;
            font-weight: bold;
            border-radius: 5px;
            transition: transform 0.4s;
            border: none;
            cursor: pointer;
        }

        .btn:hover { transform: scale(1.05); }

        .grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
            gap: 2rem;
        }

        .card { background: white; padding: 1.5rem; border-radius: 8px; box-shadow: 0 2px 4px rgba(0,0,0,0.05); }

        footer { text-align: center; padding: 2rem; background: var(--primary); color: white; }

        @media (max-width: 600px) {
            h1 { font-size: 1.8rem; }
            nav { font-size: 0.7rem; }
        }