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

        body {
            font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
            line-height: 1.6;
            color: #333;
        }

        /* Navbar Styles */
        .navbar {
            background: linear-gradient(135deg, #1b1f35 0%, #433452 100%);
            padding: 1rem 0;
            box-shadow: 0 2px 10px rgba(0,0,0,0.1);
            position: sticky;
            top: 0;
            z-index: 1000;
        }

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

        .logo {
            color: white;
            font-size: 1.5rem;
            font-weight: bold;
        }

        .nav-menu {
            display: flex;
            list-style: none;
            gap: 1rem;
        }

        .nav-btn {
            background: rgba(255, 255, 255, 0.2);
            color: white;
            padding: 0.7rem 1.5rem;
            border: 2px solid rgba(255, 255, 255, 0.3);
            border-radius: 5px;
            cursor: pointer;
            transition: all 0.3s ease;
            font-size: 1rem;
            text-decoration: none;
            display: inline-block;
        }

        .nav-btn:hover {
            background: white;
            color: #667eea;
            transform: translateY(-2px);
            box-shadow: 0 4px 8px rgba(0,0,0,0.2);
        }

        /* Hero Section */
        .hero {
            background: linear-gradient(135deg, #16171d 0%, #17101f 100%);
            color: white;
            padding: 5rem 2rem;
            text-align: center;
        }

        .hero h1 {
            font-size: 3rem;
            margin-bottom: 1rem;
        }

        .hero p {
            font-size: 1.3rem;
            max-width: 600px;
            margin: 0 auto;
        }

        /* Content Sections */
        .section {
            max-width: 1200px;
            margin: 20px auto;
            padding: 4rem 2rem;
            background: #f8f9fa;
        }

        .section h2 {
            font-size: 2.5rem;
            margin-bottom: 1.5rem;
            color: #667eea;
        }

        .section p {
            font-size: 1.1rem;
            line-height: 1.8;
            margin-bottom: 1rem;
        }
        .section ul {
            padding-left: 60px; /* tai 2em */
            margin-left: 0;
        }


        .section:nth-child(even) {
            background: #f8f9fa;
        }

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

        .board-member {
            background: white;
            padding: 2rem;
            border-radius: 10px;
            box-shadow: 0 4px 6px rgba(0,0,0,0.1);
            transition: transform 0.3s ease;
        }

        .board-member:hover {
            transform: translateY(-5px);
            box-shadow: 0 6px 12px rgba(0,0,0,0.15);
        }

        .board-member h3 {
            color: #667eea;
            margin-bottom: 0.5rem;
        }

        .board-member p {
            color: #666;
            font-size: 1rem;
        }

        /* Footer */
        footer {
            background: #333;
            color: white;
            text-align: center;
            padding: 2rem;
        }

        /* Responsive */
        @media (max-width: 768px) {
            .nav-menu {
                flex-direction: column;
                gap: 0.5rem;
            }

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

            .section h2 {
                font-size: 2rem;
            }
        }