* { background-color: rgba(43,56,54,0.0); padding: 0px; } GtkLabel { font-size: 10px; color: #ffffff; } #toolbar { border-radius: 25px; border: 3px solid #212B2A; background: rgba(43,56,54,0.6); } GtkButton:hover { border-radius: 45px; background: rgba(43,56,54,1.0); border: 1px solid #212B2A; } #title_label { font-size: 12px; }