    /**
     * @class Ext.grid.column.Column
     */

    /**
     * @var {string}
     * The font-family of grid column headers
     */
    $grid-column-header-font-family: $font-family !default;

    /**
     * @var {number}
     * The font-size of grid column headers
     */
    $grid-column-header-font-size: $font-size !default;

    /**
     * @var {string}
     * The font-weight of grid column headers
     */
    $grid-column-header-font-weight: normal !default;

    /**
     * @var {number}
     * The line-height of grid column headers
     */
    $grid-column-header-line-height: round($grid-row-cell-font-size * 1.15) !default;

    // private
    $grid-column-header-font: $grid-column-header-font-weight #{$grid-column-header-font-size}/#{$grid-column-header-line-height} $grid-column-header-font-family !default;

    /**
     * @var {string}
     * The text-overflow of grid column headers
     */
    $grid-column-text-overflow: ellipsis !default;

    /**
     * @var {color}
     * The text color of grid column headers
     */
    $grid-column-header-color: #000 !default;

    /**
     * @var {number}
     * The border-width of grid column headers
     */
    $grid-column-header-border-width: 1px !default;

    /**
     * @var {string}
     * The border-style of grid column headers
     */
    $grid-column-header-border-style: solid !default;

    // private
    $grid-header-height: $grid-column-header-line-height + vertical($grid-header-padding);