923 style
look for
code:
button[class="TabButton"]
{
foreground:argb(0,152,151,139);
Accessible:true;
AccRole:43;
tooltip:true;
animation:rectanglev|fast|log;
alpha:192;
padding:rect(1,1,0,1);
}
button[class="TabButton"][enabled=false]
{
foreground:rgb(128,128,128);
alpha:178;
}
button[class="TabButton"][selected]
{
alpha:255;
background:argb(0,255,255,255);
padding:rect(0,0,0,0);
BorderColor:argb(0,0,0,0);
BorderThickness:rect(0,0,1,0);
}
and include the padding, so that borders will be out of the window or change all border thickness to 0 (in mine, i let like that so that the active tab would have a black line outside the tab)
here's the result: