Header CTA flush with top right corner; bottom border full bleed

Site URL: https://flower-fish-2n8f.squarespace.com/

Trying to make header look like image "LV-Nav" below, but not having any luck with setting the CTA button to margin-top and margin-right 0, nor with setting the border to margin-left 0. I am fairly sure the class I want is .header-display-desktop, as that's giving me the line where I want it in relation to the CTA button, but nothing else I've tried works. Here's what I have working on the header right now:

@LVblack: #231F20;

.header-display-desktop {
  border-bottom: 1px solid @LVblack;
}

Site PW: headerhelp

Thanks in advance for any insight!

On 8/5/2022 at 4:27 AM, tuanphan said:

Use this CSS

.header-announcement-bar-wrapper {
    padding-right: 0 !important;
    padding-top: 0 !important;
}

 

Perfect, thank you so much!