La clase en la línea 635, estas propiedades:
-webkit-box-shadow: inset 0 1px 0 rgba(255,255,255,0.05), 0 -1px 0 rgba(0,0,0,0.2), inset 1px 0 0 rgba(0,0,0,0.2), inset -1px 0 0 rgba(0,0,0,0.2);
box-shadow: inset 0 1px 0 rgba(255,255,255,0.05), 0 -1px 0 rgba(0,0,0,0.2), inset 1px 0 0...