/* Reset Dasar */
        * {
            margin: 0;
            padding: 0;
            box-sizing: border-box;
            font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
        }

        body {
            background-color: #f4f6f9;
            color: #333;
            line-height: 1.6;
        }

        /* Header / Navigasi */
        header {
            background-color: #2c3e50;
            color: #ffffff;
            padding: 3px 0;
            position: sticky;
            top: 0;
            box-shadow: 0 2px 5px rgba(0,0,0,0.1);
        }

        .container {
            width: 85%;
            margin: 0 auto;
            display: flex;
            justify-content: space-between;
            align-items: center;
        }

        header h1 {
            font-size: 30px;
            padding: 1px 0;
            font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
            text-align: left;
        }

        nav a {
            color: #fff;
            text-decoration: none;
            margin-left: 20px;
            transition: color 0.3s;
        }

        nav a:hover {
            color: #3498db;
        }

        /* Hero Section (Halaman Utama) */
        .hero {
            background: linear-gradient(135deg, #3498db, #2c3e50);
            color: white;
            padding: 80px 0;
            text-align: center;
        }

        .hero h2 {
            font-size: 42px;
            margin-bottom: 15px;
        }

        .hero p {
            font-size: 18px;
            margin-bottom: 25px;
            opacity: 0.9;
        }

        .btn {
            display: inline-block;
            background-color: #e74c3c;
            color: white;
            padding: 12px 30px;
            text-decoration: none;
            border-radius: 5px;
            font-weight: bold;
            transition: background 0.3s;
        }

        .btn:hover {
            background-color: #c0392b;
        }

        /* Konten Utama */
        .main-content {
            padding: 50px 0;
        }

        .grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
            gap: 30px;
            margin-top: 30px;
        }

        .card {
            background: white;
            padding: 25px;
            border-radius: 8px;
            box-shadow: 0 4px 6px rgba(0,0,0,0.05);
        }

        .card h3 {
            margin-bottom: 10px;
            color: #2c3e50;
        }

        /* Footer */
        footer {
            background-color: #2c3e50;
            color: #fff;
            text-align: center;
            padding: 20px 0;
            margin-top: 40px;
            font-size: 14px;
        }