/* prefix declarations */
@mixin prefixed($property, $value) {
    -webkit-#{$property}: $value;
       -moz-#{$property}: $value;
        -ms-#{$property}: $value;
         -o-#{$property}: $value;
            #{$property}: $value;
}

@mixin prefixedKeyframe($name) {
    @-webkit-keyframes $name {
        @content;
    }

    @-moz-keyframes $name {
        @content;
    }

    @-ms-keyframes $name {
        @content;
    }

    @-o-keyframes $name {
        @content;
    }

    @keyframes $name {
        @content;
    }
}