@mixin comHeight($height) {
  height: -webkit-calc(100% - #{$height});
  height: -moz-calc(100% - #{$height});
  height: calc(100% - #{$height});
}

@mixin elBtn($color) {
    border-color: $color;
    background-color: $color;
    &:hover {background-color: lighten($color,3%);}
    //&:focus {background-color: darken($color,7%);}
}