@mixin box-shadow($top, $left, $blur, $color, $inset: false) {
  @if $inset {
    -webkit-box-shadow:inset $top $left $blur $color;
    -moz-box-shadow:inset $top $left $blur $color;
    box-shadow:inset $top $left $blur $color;
  } @else {
    -webkit-box-shadow: $top $left $blur $color;
    -moz-box-shadow: $top $left $blur $color;
    box-shadow: $top $left $blur $color;
  }
}

@mixin fadeIn($duration:0.3s) {
    -webkit-transition: all $duration ease-in-out;
    -moz-transition: all $duration ease-in-out;
    -o-transition: all $duration ease-in-out;
    transition: all $duration ease-in-out;
}