Header slider titles and subtitles fonts change - Sydney

Hi, I have a problem with fonts I want to change in Header slider titles and subtitles. I would like to use the Google Font type: Open Sans in version light 300. Could you advise me what custom css code should I apply?
Also I would like to thank you for a very good theme. I like Sydney very much.

Hi,

Please post a link to your website, so I can give you a working solution.

Best Regards,
Csaba

Hi Csaba, thanks for your will to help; my website is not visible in public yet, however in the meantime I changed the idea of the frontpage so pls leave this question; I will be back in case of the other questions/problems

Hi,

Ok, if you need help with anything else, please open a new topic.

Have a nice day!

Best Regards,
Csaba