body { font-family: 'Arial', sans-serif; line-height: 1.6; color: #333; max-width: 1200px; margin: 0 auto; padding: 20px; }
        .logo { font-size: 28px; font-weight: bold; color: #FF6B35; text-shadow: 2px 2px 4px rgba(0,0,0,0.1); }
        nav { background: #1E3A8A; padding: 15px; border-radius: 8px; margin-bottom: 30px; }
        nav a { color: white; margin: 0 15px; text-decoration: none; }
        .mobile-menu { display: none; background: #1E3A8A; color: white; padding: 10px; text-align: center; cursor: pointer; }
        h1 { color: #1E3A8A; border-bottom: 3px solid #FF6B35; padding-bottom: 10px; }
        h2 { color: #3B82F6; margin-top: 30px; }
        h3 { color: #60A5FA; }
        .download-btn { background: #22C55E; color: white; padding: 12px 25px; border-radius: 8px; text-decoration: none; font-weight: bold; display: inline-block; margin: 15px 0; }
        .login-btn { background: #3B82F6; color: white; padding: 12px 25px; border-radius: 8px; text-decoration: none; font-weight: bold; display: inline-block; margin: 15px 0; }
        .highlight { background: #FFF3BF; padding: 3px 8px; border-radius: 4px; }
        img { max-width: 100%; height: auto; margin: 20px 0; border-radius: 8px; }
        footer { margin-top: 50px; padding: 20px; background: #1E3A8A; color: white; border-radius: 8px; }
        @media (max-width: 768px) {
            .desktop-nav { display: none; }
            .mobile-menu { display: block; }
            .responsive-nav { display: none; padding: 15px; }
            .responsive-nav a { display: block; padding: 10px; }
        }