Moksha Primary Menu Dropdown Style - How can I change it?

Site URL: https://www.peterboroughhouse.com.au/

Hi There, I would like to change the style of my dropdown menu items from my primary menu - at the moment they don't look great - I can't remember how I did this originally - I would be grateful if you could please remind me / let me know / how to do this? I would also appreciate any design suggestions as I'm not even sure how I'm going to make it look better!! Thank you so much!!! 😅

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