Form Query for Gated Content

[AJ_Kakrot]

Hi Everyone, 

So i have the landing page created in WordPress where now I want to embed the HubSpot form and apply the styling as per our brand guidelines. Is there any way to embed the form without installing WordPress HubSpot plugin. I asked developer this can be done without plugin however he's struggling for the same so is there any article or video that can help developer to embed the forms. 

The second query I've, in the same landing page we have the certain button elements as of now which opens the pop-up WordPress forms. Once these forms are filled the download content is available to the users. Now I want to replace these WP forms with HS forms but it should be also pop-up. So is that doable. Would be great to have the approach on this. 

Landing Page - townhouse.alembiccity.com

Thanks

[AJ_Kakrot]

Deliberately replying if someone can help me on this.