Hi David,
Thanks for reaching out with your detailed screen capture and thank you for using Crio Pro WordPress theme!
I think you have everything correct with your custom CSS but you might need to add an !important
tag to your element like below:
/* for the top menu, reduce padding */
.standard-menu-enabled .sm-clean a,
.standard-menu-enabled .sm-clean a:hover {
padding: 5px 15px 5px 15px !important;
}
I hope this helps! Please don’t hesitate to reach back out if you have any other questions for us.