Remove Underline on Navigation and Menu Dropdowns

I want to remove the underline in my Squarespace website for my navigation page and dropdown pages within the navigation page. Can anyone help with custom CSS?

Hello @TalinUnruh, let me try to help you out.

.header-nav-item.header-nav-item--folder .header-nav-folder-content a {
    border: none !important;
}

.header-nav-wrapper a {
    background-image: none !important;
}

Let me know how it goes.