GtkButton { engine: none; border-radius: 0; background-image: none; border-image: none; border-style: none; background-color: rgba(0, 0, 0, 0); border-width: 0; } .row1, .row2, .row3 { /*border:5px solid blue;*/ border-width: 5px; border-style: solid; border-color: blue; background-color:orange; } .column1 { /* border-radius: 20px */; } .column2 { border-radius: 0; } .row2 { box-shadow: rgba(0,0,0,1) 15/*px*/ 15/*px*/ inset } .row3 { box-shadow: rgba(0,0,0,1) 15/*px*/ 15/*px*/ 0 10/*px*/ /*spread*/ inset } .reference-border { border-width: 5px; border-style: solid; border-color: blue; } .reference-background { background-color: orange; } .reference-shadow { background-color: rgba(0,0,0,1); } /* .reference-padding-radius { border-radius: 15px } .reference-radii1 { border-radius: 15px 0 10px; } .reference-radii2 { border-radius: 5px 0 10px; } */