Hello,
Edit the element http://prntscr.com/idr10p and change the units. You did not do this. Stil font-size is without units.
1) Do you want to change the bg and text color for that notice? Add the following custom then
.demo_store {
color: #ffffff;
background-color: #ff0002;
}
2) Change the padding to what you need
.menu-wrapper .menu > li > a {
padding: 0.77em 0.07em;
}
Regards