.pie() {
    behavior: url(/_layouts/CWP.Branding/styles/pie/PIE.htc);
}

// Button variants
// -------------------------
// Easily pump out default styles, as well as :hover, :focus, :active,
// and disabled options for all buttons
.button-gradient-variant(@color; @start-color; @end-color; @border) {
    color: @color;
    //#gradient > .vertical(@start-color, @end-color, 0%, 100%);
    background-image: -webkit-gradient(linear, left 0%, left 100%, from(@start-color), to(@end-color)); // Safari 4+, Chrome 2+
    background-image: -webkit-linear-gradient(top, @start-color 0%, @end-color 100%); // Safari 5.1+, Chrome 10+
    background-image:  -moz-linear-gradient(top, @start-color 0%, @end-color 100%); // FF 3.6+
    background-image: linear-gradient(to bottom, @start-color 0%, @end-color 100%); // Standard, IE10
    background-repeat: repeat-x;
    border-color: @border;

    &:hover,
    &:focus,
    &:active,
    &.active,
    .open .dropdown-toggle& {
        color: @color;
        //#gradient > .vertical(@start-color, darken(@end-color, 5%), 0%, 100%);
        //.vertical(@start-color: #555; @end-color: #333; @start-percent: 0%; @end-percent: 100%) {
        background-image: -webkit-gradient(linear, left 0%, left 100%, from(@start-color), to(darken(@end-color, 8%))); // Safari 4+, Chrome 2+
        background-image: -webkit-linear-gradient(top, @start-color 0%, darken(@end-color, 8%) 100%); // Safari 5.1+, Chrome 10+
        background-image:  -moz-linear-gradient(top, @start-color 0%, darken(@end-color, 8%) 100%); // FF 3.6+
        background-image: linear-gradient(to bottom, @start-color 0%, darken(@end-color, 8%) 100%); // Standard, IE10
        background-repeat: repeat-x;
        //filter: e(%("progid:DXImageTransform.Microsoft.gradient(startColorstr='%d', endColorstr='%d', GradientType=0)",argb(@start-color),argb(@end-color))); // IE9 and down
      //}


        border-color: @border;
    }

    &:active,
    &.active,
    .open .dropdown-toggle& {
        //#gradient > .vertical(@start-color, darken(@end-color, 5%), 0%, 100%);
        background-image: -webkit-gradient(linear, left 0%, left 100%, from(@start-color), to(darken(@end-color, 8%))); // Safari 4+, Chrome 2+
        background-image: -webkit-linear-gradient(top, @start-color 0%, darken(@end-color, 8%) 100%); // Safari 5.1+, Chrome 10+
        background-image:  -moz-linear-gradient(top, @start-color 0%, darken(@end-color, 8%) 100%); // FF 3.6+
        background-image: linear-gradient(to bottom, @start-color 0%, darken(@end-color, 8%) 100%); // Standard, IE10
        background-repeat: repeat-x;
    }

    &.disabled,
    &[disabled],
    fieldset[disabled] & {
        &,
        &:hover,
        &:focus,
        &:active,
        &.active {
            background-color: @start-color;
            border-color: @border;
        }
    }
}

#border-gradient {
    .vertical(@start-color: #555;@end-color: #333;@start-percent: 0%;@end-percent: 100%;) {
        border-image: -webkit-gradient(linear, left top, left bottom, from(#00abeb), to(#fff), color-stop(0.5, #fff), color-stop(0.5, #66cc00)) 21 30 30 21 repeat repeat;
        //border-image: -webkit-gradient(linear, left @start-percent, left @end-percent, from(@start-color), to(@end-color))  21 30 30 21 repeat repeat; // Safari 4+, Chrome 2+
        //border-image: -webkit-linear-gradient(top, @start-color @start-percent, @end-color @end-percent)  21 30 30 21 repeat repeat; // Safari 5.1+, Chrome 10+
        //border-image: -moz-linear-gradient(top, @start-color @start-percent, @end-color @end-percent)  21 30 30 21 repeat repeat; // FF 3.6+
        //border-image: linear-gradient(to bottom, @start-color @start-percent, @end-color @end-percent)  21 30 30 21 repeat repeat; // Standard, IE10
        //border-repeat: repeat-x;
        //filter: e(%("progid:DXImageTransform.Microsoft.gradient(startColorstr='%d', endColorstr='%d', GradientType=0)",argb(@start-color),argb(@end-color))); // IE9 and down
    }
}