Create an announcement on the Navigation Bar

I found I needed an announcement on the Navigation Bar to give it prominence on the forum. We don't use the HEADLINES feature so have that tab hidden which gives a fair amount of space between the ABOUT TAB and the Search Box. The following works fin on Classic with sidebar and I'll check out other themes for compatibility.

/* Announcement on the Navigation Bar (35 characters after the ANNOUNCEMENT: more makes the line wrap) */
#nav:after
{
background-color:#336699 !important;
display:inline;
color:yellow;
float:left;
font-weight:bold;
line-height:30px;
margin-right:30px;
text-align:center;
content:"ANNOUNCEMENT: Test announcement. Works well eh?";
}

Does not work so well on Juice theme as space is limited and you can't remove the Headlines tab completely, you have to remove the added RH end of the tab too and then all the other tabs loose it. Still for one or two words it's fine.