body { font-family: 'Arial', sans-serif; line-height: 1.6; color: #333; background: #f9f9f9; margin: 0; padding: 0; }
        .container { max-width: 1200px; margin: 0 auto; padding: 20px; }
        .header { background: linear-gradient(135deg, #FF6B35, #FFE135); padding: 20px; text-align: center; color: white; }
        .logo { font-size: 2.5em; font-weight: bold; text-shadow: 2px 2px 4px rgba(0,0,0,0.3); }
        .nav { display: flex; justify-content: center; gap: 20px; margin-top: 10px; }
        .nav a { color: white; text-decoration: none; font-weight: bold; }
        .mobile-toggle { display: none; }
        .content { background: white; padding: 30px; border-radius: 8px; box-shadow: 0 0 10px rgba(0,0,0,0.1); }
        .download-btn, .login-btn { display: inline-block; padding: 12px 25px; margin: 15px 0; background: #FF6B35; color: white; border-radius: 5px; text-decoration: none; font-weight: bold; }
        .login-btn { background: #4CAF50; }
        img { max-width: 100%; height: auto; margin: 20px 0; border-radius: 8px; }
        .footer { background: #333; color: white; text-align: center; padding: 20px; margin-top: 30px; }
        h1, h2, h3 { color: #FF6B35; }
        h1 { font-size: 2.2em; }
        h2 { font-size: 1.8em; margin-top: 30px; }
        h3 { font-size: 1.5em; margin-top: 25px; }
        @media (max-width: 768px) {
            .nav { display: none; flex-direction: column; }
            .nav.active { display: flex; }
            .mobile-toggle { display: block; background: none; border: none; color: white; font-size: 1.5em; cursor: pointer; }
            .container { padding: 10px; }
            .content { padding: 20px; }
        }