/*$base_fz : 12;
@mixin fz($fz : $base_fz, $b : $base_fz) {
  font-size: $fz/$b*100%;
}
*/


@mixin inline_block {
  display: inline-block;
  *display: inline;
  *zoom: 1;
}

@mixin round($r : 3px) {
  -webkit-border-radius: $r;
  -moz-border-radius: $r;
  -ms-border-radius: $r;
  border-radius: $r;
}

@mixin opacity($opacity) {
  opacity: $opacity;
  $opacityIE: $opacity * 100;
  filter: alpha(opacity=$opacityIE);
}

@mixin shadow {
  -webkit-box-shadow: 0px 1px 2px 0px rgba(0,0,0,0.15);
  -moz-box-shadow: 0px 1px 2px 0px rgba(0,0,0,0.15);
  box-shadow: 0px 1px 2px 0px rgba(0,0,0,0.15);
}

@mixin parallelogram($deg) {
  -webkit-transform: skew($deg);
  -moz-transform: skew($deg);
  -o-transform: skew($deg);
  -ms-transform: skew($deg);
  transform: skew($deg);
}