@import url("reset-to-defaults.css"); GtkButton { background-color: red; border-color: lime; border-width: 1px; } .button-top-left { border-style: solid none none solid; } .button-top-right { border-style: solid solid none none; } .button-bottom-left { border-style: none none solid solid; } .button-bottom-right { border-style: none solid solid none; } .button-border { border-style: solid; }