Dropdown navigation menu has a random white border?

Site URL: https://capybera-grouse-dkb9.squarespace.com/

I am trying to get rid of the random white border that is surrounding my dropdown navigation menu. I cannot figure it out for the life of me. Attached is a picture and also the code I have for the header is below. Thank you!

*Under Custom CSS*

/* Header Nav: Remove Underline Under Nav */
header#header a:not(.btn) {
    background-image: none !important;
}

/* Header Nav Dropdown: Outline */

 .header-nav-folder-item {
    text-align: center;
       border: 1px solid #056739;
      padding: .5rem !important;
}

*Under Home Page Advanced*

<style>
/* Nav Item Hover Color */
.header-nav-item a:hover {
    color: #056739 !important;
}
  
/* Turn Social Icons Green on Hover */
.header-actions-action--social .icon:hover svg{
  fill: #056739 !important;
}
</style>

Hi,

What is access password?

I am no longer having the issue, thank you though!