Linking a class and smoothing translate3d

Good day,

I Hope all is well. I’m a Web Designer stuck in the office to do a Web Dev job I need your help with the follow we have deadline to meet and I’m in the corner. I’ts 3 things I want from a website.

Link to the site:

  1. I want to make my logo link back to the splash page. Logo is on the top left of the home page.

  2. on the same website on the Gallery page when I click on one of my filters it animates using the translate3d how can i make it smooth the animation.