Stretch Navigation Bar to full screen width

Site URL: https://www.purnamayurveda.com

Hi, 

Is there a way to have the navigation bar always stretched out to the full width of the screen?

Because it is not full width, it wraps and becomes 2 lines instead of a single line. See screen recording. 

Any solutions for this? 

Thanks

Add to Design > Custom CSS

.header-nav-list {
    flex-wrap: nowrap !important;
}