body { font-family: 'Segoe UI', Arial, sans-serif; line-height: 1.6; color: #333; margin: 0; padding: 0; }
        header { background: linear-gradient(135deg, #FF6B35, #FF8E53); color: white; padding: 1rem; text-align: center; }
        .logo { font-size: 2rem; font-weight: bold; text-shadow: 2px 2px 4px rgba(0,0,0,0.3); }
        nav { display: flex; justify-content: center; gap: 1.5rem; margin: 1rem 0; }
        nav a { color: white; text-decoration: none; font-weight: 500; }
        .mobile-nav-toggle { display: none; background: #FF8E53; border: none; color: white; padding: 0.5rem; }
        .container { max-width: 1200px; margin: 0 auto; padding: 1rem; }
        h1, h2, h3 { color: #FF6B35; margin-top: 1.5rem; }
        h1 { font-size: 2.2rem; }
        h2 { font-size: 1.8rem; }
        h3 { font-size: 1.5rem; }
        img { max-width: 100%; height: auto; margin: 1rem 0; }
        .btn { display: inline-block; padding: 0.8rem 1.5rem; background: #FF6B35; color: white; text-decoration: none; border-radius: 5px; margin: 0.5rem; }
        .download-section { text-align: center; margin: 2rem 0; }
        footer { background: #333; color: white; text-align: center; padding: 1.5rem; margin-top: 2rem; }
        @media (max-width: 768px) {
            .mobile-nav-toggle { display: block; position: absolute; top: 1rem; right: 1rem; }
            nav { display: none; flex-direction: column; align-items: center; }
            nav.active { display: flex; }
        }