// Appearance
// --------------------------------------------------

@mixin appearance($val) {
  -webkit-appearance: $val;
  -moz-appearance: $val;
}


// Calc
// --------------------------------------------------

@mixin calc($property, $expression) {
  #{$property}: -webkit-calc(#{$expression});
  #{$property}: calc(#{$expression});
}


// Input Placeholder
// --------------------------------------------------

@mixin placeholder($color: #999, $text-indent: 0) {
  &::-moz-placeholder { // Firefox 19+
    color: $color;
  }
  &:-ms-input-placeholder {
    color: $color;
  }
  &::-webkit-input-placeholder {
    color: $color;
    // Safari placeholder margin issue
    text-indent: $text-indent;
  }
}


// SVG Background Image Mixin
// --------------------------------------------------

@mixin svg-background-image($svg) {
  $url: url-encode($svg);
  background-image: url("data:image/svg+xml;charset=utf-8,#{$url}");
}


// User Select None
// --------------------------------------------------

@mixin user-select-none() {
  -webkit-user-select: none;
  -moz-user-select: none;
  -ms-user-select: none;
  user-select: none;
}