Mobile adjustments css

Site URL: http://studiobarnhus.com/

Hi,

I'm trying to figure out how to adjust 2 things on the mobile version of a site Im working on. 

the password for the site is "barnhusstudio12q". 

Issue 1 (category filters):
I would like these links/filters to simply appear at the top, with the active link in blue color. Right now theres a + for expanding and opacity and alot of mess, I can seem to figure out how to disable this without removing it all together.... 

Issue 2 (mobile menu): If it's possible I would like to do a full screen mobile menu with a white background and a closing "X" and not the expandable version that comes as a solution for this template (avenue).

Any css experts out there that know how to solve any of these issues? 

All the best,

Q1. Add to Home > Design > Custom CSS

.category-nav-links .active-link a {
    color: blue !important;
}

Q2. I see you solved. Can you provide the code for other members? Thank you.