Can a BoldGrid theme be made fully responsive to adjust to screen resolution?

Hello everybody,

I am using a BoldGrid theme called Gridone on philipus.com and would like to know if there is a way to make that theme “fully responsive” so that large images resize freely based on the user’s screen resolution?

Currently, larger images overflow below the lower edge of the screen. Also, images do not resize smoothly when the browser window is resized. You can see this on the front page where I have a 900×900 image.

Thank you in advance
Philip