body { font-family: 'Arial', sans-serif; line-height: 1.6; color: #333; max-width: 1200px; margin: 0 auto; padding: 20px; }
        h1 { color: #FF6B35; text-align: center; margin-bottom: 30px; }
        h2 { color: #2E8B57; border-bottom: 2px solid #FFD700; padding-bottom: 5px; }
        h3 { color: #4682B4; }
        .logo { font-size: 28px; font-weight: bold; color: #FF4500; text-shadow: 1px 1px 2px rgba(0,0,0,0.2); }
        .nav-btn { display: none; }
        .download-btn { background: #4CAF50; color: white; padding: 12px 24px; border-radius: 5px; text-decoration: none; margin: 15px 0; display: inline-block; }
        .login-btn { background: #2196F3; color: white; padding: 12px 24px; border-radius: 5px; text-decoration: none; margin: 15px 10px; display: inline-block; }
        img { max-width: 100%; height: auto; margin: 20px 0; border-radius: 8px; }
        .mobile-nav { display: none; }
        @media (max-width: 768px) {
            .desktop-nav { display: none; }
            .mobile-nav { display: block; text-align: center; margin-bottom: 20px; }
            .nav-btn { display: inline-block; background: #FF6B35; color: white; padding: 10px 15px; border: none; cursor: pointer; }
        }