Hey @frankburder,
If you look closely, elements in that bar are responsive because of the default responsive behavior set in the theme. However, your menu is just too long for 1366px screen width down to 981px. It is best that you rethink what goes into your menu. There is no automatic way to resolve that. There are many responsive design setups and there’s no way to account for all of them automatically. What do you want to do in this situation?

Because the problem is spatial limitation, you would need to sacrifice an item or two.
Here are some options:
####1. Reduce spacing between menus as suggested by @joao previously
####2. Reduce the base font size of the menu sacrificing legibility

The base font size in your setup is set to 1.2 em. That means, it is 1.2 times 16px in screens above 1200px and 1.2 times 14px within 1199px to 980px screen widths.
16px and 14px are taken from the Typography settings

In 1199px screen size, here’s how it looks with 1.2 x 14px.

If the screen has not yet reached 1199px, here’s how it looks.

####3. Reduce the logo size.
####4. Reduce the number of your menu items.
####5. Use custom media query to make the menu font size small starting 1366px screen width down to 981px. This is not recommended because you will need to reduce the font size and spacing significantly. Sacrificing legibility in favor of responsive function. This would also be outside the scope of our support as this would be involved.
Thanks.