Changing box size on Cover Page

Hi,

I am working on a "cover page" using the "flash" layout. I would love to be able to change the size of the box from half the page to 1/3 of the page. Does anyone have code I could use to do this? or suggestions? Would truly appreciate it!

Thank You so much!

@sashkraz Can you share site url?

Yes it's. nomadchicago.squarespace.com

Thank you.

@sashkraz you mean left side (image) or right side (text)?

/* Image */
.sqs-slide-layer-content.content-gallery {
   width: 66% !important;
}
/* Text */
.sqs-slide-layer-content.content-copy {
   width: 33% !important;
}

@tuanphan I mean the left side of the "tan" box. Just need that box (with the text on top) to take up 1/3 of the page, not 1/2 the page. If that is possible? Thank You so much for your help!!

@tuanphan This code you gave me:

/* Image */ .sqs-slide-layer-content.content-gallery { width: 66% !important;

Is on the right track. When I use it- it creates a side bar that is grey this is the size I would like my "tan" box with the text on top to be. With this code the grey box appears but my tan box with the text disappears. Thank You!