Featured Image Slider Mobile Responsiveness

Hi Everyone, I'm using the featured slider on a page of my website, but I've notice that the slider isn't very responsive for mobile viewing. Specifically, the text will overflow outside of the slider image when viewed on a smart phone. The thumbnails are also a bit small. Wondering if there is a way to have each slider image maintain a mobile page width and have the image cropped accordingly. Or just a way to prevent text overflow? My site is http://philadelphiacontemporary.org/projects/ Thanks for any help!