Css Validation Errors ?

design/themes/basic/css/grid.less





.input-block-level {
display: block;
width: 100%;
min-height: ;
-webkit-box-sizing: border-box;
-moz-box-sizing: border-box;
box-sizing: border-box;
}






why is [color=#000000]min-height: ; nothing?[/color]







[color=#000000]this comes from responsive…[/color]





// Block level inputs

.input-block-level {

display: block;

width: 100%;

min-height: @inputHeight; // Make inputs at least the height of their button counterpart (base line-height + padding + border)

.box-sizing(border-box); // Makes inputs behave like true block-level elements

}





from design/themes/basic/css/lib/bootstrap/less/mixins.less



seems its missing default values ?



https://github.com/twbs/bootstrap/blob/master/less/variables.less