    // private vars
    $datepicker-width: ($datepicker-item-width * 7) + horizontal($datepicker-border-width);
    $datepicker-button-height: $button-small-icon-size + vertical($button-small-padding);
    $datepicker-monthpicker-months-width: floor(($datepicker-width - horizontal($datepicker-border-width)) / 2);
    $datepicker-monthpicker-years-width: ceil(($datepicker-width - horizontal($datepicker-border-width)) / 2);
    $datepicker-monthpicker-yearnav-height: $datepicker-monthpicker-item-height + vertical($datepicker-monthpicker-item-margin);
    $datepicker-monthpicker-small-yearnav-height: $datepicker-monthpicker-small-item-height + vertical($datepicker-monthpicker-small-item-margin);

    .#{$prefix}datepicker {
        @if $datepicker-border-width != 0 {
            border-width: $datepicker-border-width;
        }
        border-style: $datepicker-border-style;
        border-color: $datepicker-border-color;
        background-color: $datepicker-background-color;
        width: $datepicker-width;
    }

    .#{$prefix}datepicker-header {
        padding: $datepicker-header-padding;
        text-align: $datepicker-header-text-align;
        @if $datepicker-header-background-gradient {
            @include background-gradient($datepicker-header-background-color, $datepicker-header-background-gradient);
        } @else {
            background-color: $datepicker-header-background-color;
        }
    }

    @if not $datepicker-use-transparent-month-button {
        $datepicker-button-height: $datepicker-button-height + vertical($button-small-border-width);
    }
    .#{$prefix}datepicker-arrow {
        width: $datepicker-arrow-width;
        height: $datepicker-arrow-height;
        top: round(($datepicker-button-height + vertical($datepicker-header-padding) - $datepicker-arrow-height) / 2);
        cursor: $datepicker-arrow-cursor;

        // EXTJSIV-8846: partially transparent png images do not display correctly
        // in winXP/IE8m when the image element has a transparent background.
        // to fix this, we give the element the same background-color as the datepicker.
        background-color: $datepicker-header-background-color;

        @if $datepicker-arrow-opacity != 1 {
            @include opacity($datepicker-arrow-opacity);
        }
    }

    @if $datepicker-arrow-opacity-over != 1 or $datepicker-arrow-opacity != 1  {
        // include the element name since :hover causes performance issues in IE7 and 8 otherwise
        a.#{$prefix}datepicker-arrow:hover {
            @include opacity($datepicker-arrow-opacity-over);
        }
    }

    .#{$prefix}datepicker-next {
        right: right($datepicker-header-padding);
        background-image: theme-background-image($datepicker-next-image);
    }

    .#{$prefix}datepicker-prev {
        left: left($datepicker-header-padding);
        background-image: theme-background-image($datepicker-prev-image);
    }

    .#{$prefix}datepicker-month {
        @if $datepicker-use-transparent-month-button {
            .#{$prefix}btn,
            .#{$prefix}btn .#{$prefix}btn-tc,
            .#{$prefix}btn .#{$prefix}btn-tl,
            .#{$prefix}btn .#{$prefix}btn-tr,
            .#{$prefix}btn .#{$prefix}btn-mc,
            .#{$prefix}btn .#{$prefix}btn-ml,
            .#{$prefix}btn .#{$prefix}btn-mr,
            .#{$prefix}btn .#{$prefix}btn-bc,
            .#{$prefix}btn .#{$prefix}btn-bl,
            .#{$prefix}btn .#{$prefix}btn-br {
                background: transparent;
                border-width: 0 !important;
            }
        }

        @if $datepicker-month-button-color {
            .#{$prefix}btn-inner {
                color: $datepicker-month-button-color;
            }
        }

        .#{$prefix}btn-split-right {
            background-image: theme-background-image($datepicker-month-button-arrow-image);
            padding-right: $datepicker-month-button-arrow-width;
        }
    }

    .#{$prefix}datepicker-column-header {
        width: $datepicker-item-width;
        color: $datepicker-column-header-color;
        font: $datepicker-column-header-font-weight $datepicker-column-header-font-size $datepicker-column-header-font-family;
        text-align: $datepicker-column-header-text-align;

        @if $datepicker-column-header-border-width != 0 {
            border-width: $datepicker-column-header-border-width;
            border-style: $datepicker-column-header-border-style;
            border-color: $datepicker-column-header-border-color;
        }

        @if $datepicker-column-header-background-gradient {
            @include background-gradient($datepicker-column-header-background-color, $datepicker-column-header-background-gradient);
        } @else {
            background-color: $datepicker-column-header-background-color;
        }
    }

    .#{$prefix}datepicker-column-header-inner {
        line-height: $datepicker-column-header-height - vertical($datepicker-column-header-border-width);
        padding: $datepicker-column-header-item-padding;
    }

    .#{$prefix}datepicker-cell {
        text-align: $datepicker-item-text-align;

        @if $datepicker-item-border-width != 0 {
            border-width: $datepicker-item-border-width;
            border-style: $datepicker-item-border-style;
            border-color: $datepicker-item-border-color;
        }
    }

    .#{$prefix}datepicker-date {
        padding: $datepicker-item-padding;
        font: $datepicker-item-font-weight $datepicker-item-font-size $datepicker-item-font-family;
        color: $datepicker-item-color;
        cursor: $datepicker-item-cursor;
        line-height: $datepicker-item-height - vertical($datepicker-item-border-width);

    }

    // include the element name since :hover causes performance issues in IE7 and 8 otherwise
    a.#{$prefix}datepicker-date:hover {
        color: $datepicker-item-color; // needed to override color for prevday/nextday
        background-color: $datepicker-item-hover-background-color;
    }

    .#{$prefix}datepicker-selected {
        border-style: $datepicker-item-selected-border-style;
        border-color: $datepicker-item-selected-border-color;
        .#{$prefix}datepicker-date {
            background-color: $datepicker-item-selected-background-color;
            font-weight: $datepicker-item-selected-font-weight;
        }
    }

    .#{$prefix}datepicker-today {
        border-color: $datepicker-item-today-border-color;
        border-style: $datepicker-item-today-border-style;
    }

    .#{$prefix}datepicker-prevday,
    .#{$prefix}datepicker-nextday {
        .#{$prefix}datepicker-date {
            color: $datepicker-item-prev-next-color;
        }
    }

    .#{$prefix}datepicker-disabled {
        // include the element name to increase the specificity over the :hover rule
        a.#{$prefix}datepicker-date {
            background-color: $datepicker-item-disabled-background-color;
            cursor: $datepicker-item-disabled-cursor;
            color: $datepicker-item-disabled-color;
        }
    }

    // include the element name since :hover causes performance issues in IE7 and 8 otherwise
    .#{$prefix}datepicker-disabled  a.#{$prefix}datepicker-date:hover {
        background-color: $datepicker-item-disabled-background-color;
    }

    .#{$prefix}datepicker-footer,
    .#{$prefix}monthpicker-buttons {
        padding: $datepicker-footer-padding;

        @if $datepicker-footer-border-width != 0 {
            border-width: $datepicker-footer-border-width;
            border-style: $datepicker-footer-border-style;
            border-color: $datepicker-footer-border-color;
        }

        @if $datepicker-footer-background-gradient {
            @include background-gradient($datepicker-footer-background-color, $datepicker-footer-background-gradient);
        } @else {
            background-color: $datepicker-footer-background-color;
        }

        text-align: $datepicker-footer-text-align;
        .#{$prefix}btn {
            margin: 0 ceil($datepicker-footer-button-spacing / 2) 0 floor($datepicker-footer-button-spacing / 2);
        }
    }

    // month picker
    .#{$prefix}monthpicker {
        width: $datepicker-width;
        @if $datepicker-border-width != 0 {
            border-width: $datepicker-border-width;
        }
        border-style: $datepicker-border-style;
        border-color: $datepicker-border-color;
        background-color: $datepicker-background-color;
    }

    .#{$prefix}monthpicker-months {
        //border-right: $datepicker-border;
        @if $datepicker-monthpicker-separator-border-width != 0 {
            border-width: 0 $datepicker-monthpicker-separator-border-width 0 0;
            border-color: $datepicker-monthpicker-separator-border-color;
            border-style: $datepicker-monthpicker-separator-border-style;
        }
        width: $datepicker-monthpicker-months-width;

        .#{$prefix}monthpicker-item {
            width: floor(($datepicker-monthpicker-months-width - $datepicker-monthpicker-separator-border-width) / 2);
        }
    }

    .#{$prefix}monthpicker-years {
        width: $datepicker-monthpicker-years-width;

        .#{$prefix}monthpicker-item {
            width: floor(($datepicker-monthpicker-years-width) / 2);
        }
    }

    .#{$prefix}monthpicker-item {
        margin: top($datepicker-monthpicker-item-margin) 0 bottom($datepicker-monthpicker-item-margin);
        font: $datepicker-monthpicker-item-font-weight $datepicker-monthpicker-item-font-size $datepicker-monthpicker-item-font-family;
        text-align: $datepicker-monthpicker-item-text-align;
    }

    .#{$prefix}monthpicker-item-inner {
        margin: 0 right($datepicker-monthpicker-item-margin) 0 left($datepicker-monthpicker-item-margin);
        color: $datepicker-monthpicker-item-color;

        @if $datepicker-monthpicker-item-border-width != 0 {
            border-width: $datepicker-monthpicker-item-border-width;
            border-style: $datepicker-monthpicker-item-border-style;
            border-color: $datepicker-monthpicker-item-border-color;
        }

        line-height: $datepicker-monthpicker-item-height - vertical($datepicker-monthpicker-item-border-width);
        cursor: $datepicker-monthpicker-item-cursor;
    }

    // include the element name since :hover causes performance issues in IE7 and 8 otherwise
    a.#{$prefix}monthpicker-item-inner:hover {
        background-color: $datepicker-monthpicker-item-hover-background-color;
    }

    .#{$prefix}monthpicker-selected {
        background-color: $datepicker-monthpicker-item-selected-background-color;
        border-style: $datepicker-monthpicker-item-selected-border-style;
        border-color: $datepicker-monthpicker-item-selected-border-color;
    }

    .#{$prefix}monthpicker-yearnav {
        height: $datepicker-monthpicker-yearnav-height;
    }

    .#{$prefix}monthpicker-yearnav-button-ct {
        width: floor(($datepicker-monthpicker-years-width) / 2);
    }

    .#{$prefix}monthpicker-yearnav-button {
        height: $datepicker-monthpicker-yearnav-button-height;
        width: $datepicker-monthpicker-yearnav-button-width;
        cursor: $datepicker-monthpicker-yearnav-button-cursor;
        margin-top: floor(($datepicker-monthpicker-yearnav-height - $datepicker-monthpicker-yearnav-button-height) / 2);
        @if $datepicker-monthpicker-yearnav-button-opacity != 1 {
            @include opacity($datepicker-monthpicker-yearnav-button-opacity);
        }

        // EXTJSIV-8846: partially transparent png images do not display correctly
        // in winXP/IE8m when the image element has a transparent background.
        // to fix this, we give the element the same background-color as the datepicker.
        background-color: $datepicker-background-color;
    }

    @if $datepicker-monthpicker-yearnav-button-opacity-over != 1 or $datepicker-monthpicker-yearnav-button-opacity != 1  {
        // include the element name since :hover causes performance issues in IE7 and 8 otherwise
        a.#{$prefix}monthpicker-yearnav-button:hover {
            @include opacity($datepicker-monthpicker-yearnav-button-opacity-over);
        }
    }

    .#{$prefix}monthpicker-yearnav-next {
        background-image: theme-background-image($datepicker-monthpicker-next-image);
        background-position: $datepicker-monthpicker-next-background-position;
    }

    .#{$prefix}monthpicker-yearnav-next-over {
        background-position: $datepicker-monthpicker-next-background-position-over;
    }

    .#{$prefix}monthpicker-yearnav-prev {
        background-image: theme-background-image($datepicker-monthpicker-prev-image);
        background-position: $datepicker-monthpicker-prev-background-position;
    }

    .#{$prefix}monthpicker-yearnav-prev-over {
        background-position: $datepicker-monthpicker-prev-background-position-over;
    }

    .#{$prefix}monthpicker-small {
        .#{$prefix}monthpicker-item {
            margin: top($datepicker-monthpicker-small-item-margin) 0 bottom($datepicker-monthpicker-small-item-margin);
        }

        .#{$prefix}monthpicker-item-inner {
            margin: 0 right($datepicker-monthpicker-small-item-margin) 0 left($datepicker-monthpicker-small-item-margin);
        }

        .#{$prefix}monthpicker-yearnav {
            height: $datepicker-monthpicker-small-yearnav-height;
        }

        .#{$prefix}monthpicker-yearnav-button {
            margin-top: floor(($datepicker-monthpicker-small-yearnav-height - $datepicker-monthpicker-yearnav-button-height) / 2);
        }
    }

    //nlg support
    @if $include-slicer-gradient {
        .#{$prefix}nlg {
            @if not is-null($datepicker-header-background-gradient) {
                .#{$prefix}datepicker-header {
                    background-image: slicer-background-image(datepicker-header, 'datepicker/datepicker-header-bg');
                    background-repeat: repeat-x;
                    background-position: top left;
                }
            }

            @if not is-null($datepicker-footer-background-gradient) {
                .#{$prefix}datepicker-footer,
                .#{$prefix}monthpicker-buttons {
                    background-image: slicer-background-image(datepicker-footer, 'datepicker/datepicker-footer-bg');
                    background-repeat: repeat-x;
                    background-position: top left;
                }
            }
        }
    }

    $stretch: slicer-background-stretch(datepicker-header, bottom);
    $stretch: slicer-background-stretch(datepicker-footer, bottom);
    @include x-slicer(datepicker-header);
    @include x-slicer(datepicker-footer);