    $button-arrow-size: 12px !default;
    $button-split-size: 14px !default;
    $button-icon-spacing: 4px !default;

    $button-small-border-radius: 3px !default;
    $button-small-border-width: 1px !default;
    $button-small-padding: 2px !default;
    $button-small-text-padding: 4px;
    $button-small-font-size: ceil($font-size * .9) !default; //11px
    $button-small-font-size-over: $button-small-font-size !default;
    $button-small-font-size-focus: $button-small-font-size-over !default;
    $button-small-font-size-pressed: $button-small-font-size !default;
    $button-small-font-size-disabled: $button-small-font-size !default;
    $button-small-font-weight: normal !default;
    $button-small-font-weight-over: $button-small-font-weight !default;
    $button-small-font-weight-focus: $button-small-font-weight-over !default;
    $button-small-font-weight-pressed: $button-small-font-weight !default;
    $button-small-font-weight-disabled: $button-small-font-weight !default;
    $button-small-font-family: $font-family !default;
    $button-small-font-family-over: $button-small-font-family !default;
    $button-small-font-family-focus: $button-small-font-family-over !default;
    $button-small-font-family-pressed: $button-small-font-family !default;
    $button-small-font-family-disabled: $button-small-font-family !default;
    $button-small-icon-size: 16px !default;

    $button-medium-border-radius: 3px !default;
    $button-medium-border-width: 1px !default;
    $button-medium-padding: 3px !default;
    $button-medium-text-padding: 3px !default;
    $button-medium-font-size: ceil($font-size * .9) !default; //11px
    $button-medium-font-size-over: $button-medium-font-size !default;
    $button-medium-font-size-focus: $button-medium-font-size-over !default;
    $button-medium-font-size-pressed: $button-medium-font-size !default;
    $button-medium-font-size-disabled: $button-medium-font-size !default;
    $button-medium-font-weight: normal !default;
    $button-medium-font-weight-over: $button-medium-font-weight !default;
    $button-medium-font-weight-focus: $button-medium-font-weight-over !default;
    $button-medium-font-weight-pressed: $button-medium-font-weight !default;
    $button-medium-font-weight-disabled: $button-medium-font-weight !default;
    $button-medium-font-family: $font-family !default;
    $button-medium-font-family-over: $button-medium-font-family !default;
    $button-medium-font-family-focus: $button-medium-font-family-over !default;
    $button-medium-font-family-pressed: $button-medium-font-family !default;
    $button-medium-font-family-disabled: $button-medium-font-family !default;
    $button-medium-icon-size: 24px !default;

    $button-large-border-radius: 3px !default;
    $button-large-border-width: 1px !default;
    $button-large-padding: 3px !default;
    $button-large-text-padding: 3px !default;
    $button-large-font-size: ceil($font-size * .9) !default; //11px
    $button-large-font-size-over: $button-large-font-size !default;
    $button-large-font-size-focus: $button-large-font-size-over !default;
    $button-large-font-size-pressed: $button-large-font-size !default;
    $button-large-font-size-disabled: $button-large-font-size !default;
    $button-large-font-weight: normal !default;
    $button-large-font-weight-over: $button-large-font-weight !default;
    $button-large-font-weight-focus: $button-large-font-weight-over !default;
    $button-large-font-weight-pressed: $button-large-font-weight !default;
    $button-large-font-weight-disabled: $button-large-font-weight !default;
    $button-large-font-family: $font-family !default;
    $button-large-font-family-over: $button-large-font-family !default;
    $button-large-font-family-focus: $button-large-font-family-over !default;
    $button-large-font-family-pressed: $button-large-font-family !default;
    $button-large-font-family-disabled: $button-large-font-family !default;
    $button-large-icon-size: 32px !default;

    //base colors for the default button
    $button-default-base-color: adjust-color($neutral-color, $hue: 0deg, $saturation: -55.556%, $lightness: 12.745%) !default; //F7F7F7
    $button-default-base-color-over: adjust-color($base-color, $hue: -6.667deg, $saturation: 44.444%, $lightness: 10.588%) !default; //E4F3FF
    $button-default-base-color-focus: $button-default-base-color-over !default;
    $button-default-base-color-pressed: adjust-color($base-color, $hue: -0.725deg, $saturation: -9.556%, $lightness: -3.725%) !default; //B6CBE4
    $button-default-base-color-disabled: adjust-color($base-color, $hue: 0deg, $saturation: -55.556%, $lightness: 12.745%) !default; //F7F7F7

    $button-default-border-color: adjust-color($button-default-base-color, $hue: 0deg, $saturation: 0%, $lightness: -18.039%) !default;
    $button-default-border-color-over: adjust-color($button-default-base-color-over, $hue: 8.177deg, $saturation: -28.283%, $lightness: -12.745%) !default;
    $button-default-border-color-focus: $button-default-border-color-over !default;
    $button-default-border-color-pressed: adjust-color($button-default-base-color-pressed, $hue: 2.317deg, $saturation: 6.756%, $lightness: -5.294%) !default;
    $button-default-border-color-disabled: adjust-color($button-default-base-color-disabled, $hue: 0deg, $saturation: 0%, $lightness: -8.627%) !default;

    $button-default-background-color: $button-default-base-color !default;
    $button-default-background-color-over: $button-default-base-color-over !default;
    $button-default-background-color-focus: $button-default-background-color-over !default;
    $button-default-background-color-pressed: $button-default-base-color-pressed !default;
    $button-default-background-color-disabled: $button-default-base-color-disabled !default;

    $button-default-background-gradient: 'glossy-button' !default;
    $button-default-background-gradient-over: 'glossy-button-over' !default;
    $button-default-background-gradient-focus: $button-default-background-gradient-over !default;
    $button-default-background-gradient-pressed: 'glossy-button-pressed' !default;
    $button-default-background-gradient-disabled: 'glossy-button-disabled' !default;

    $button-default-background-gradient-color-stops: null !default;
    $button-default-background-gradient-color-stops-over: $button-default-background-gradient-color-stops !default;
    $button-default-background-gradient-color-stops-focus: $button-default-background-gradient-color-stops-over !default;
    $button-default-background-gradient-color-stops-pressed: $button-default-background-gradient-color-stops !default;
    $button-default-background-gradient-color-stops-disabled: $button-default-background-gradient-color-stops !default;

    $button-default-color: #333 !default;
    $button-default-color-over: $button-default-color !default;
    $button-default-color-focus: $button-default-color-over !default;
    $button-default-color-pressed: $button-default-color !default;
    $button-default-color-disabled: lighten($button-default-color, 35) !default;

    // Toolbar buttons
    $button-toolbar-arrow-size: 12px !default;
    $button-toolbar-split-size: 12px !default;

    $button-toolbar-base-color: adjust-color($base-color, $hue: -213.333deg, $saturation: -55.556%, $lightness: 3.333%) !default;

    $button-toolbar-border-color: transparent !default;
    $button-toolbar-border-color-over: adjust-color($base-color, $hue: 0.084deg, $saturation: -9.891%, $lightness: -18.039%) !default;
    $button-toolbar-border-color-focus: $button-toolbar-border-color-over !default;
    $button-toolbar-border-color-pressed: adjust-color($base-color, $hue: 0.721deg, $saturation: -17.014%, $lightness: -21.765%) !default;
    $button-toolbar-border-color-disabled: transparent !default;

    $button-toolbar-background-color: transparent !default;
    $button-toolbar-background-color-over: adjust-color($base-color, $hue: -5deg, $saturation: 44.444%, $lightness: 8.824%) !default;
    $button-toolbar-background-color-focus: $button-toolbar-background-color-over !default;
    $button-toolbar-background-color-pressed: adjust-color($base-color, $hue: -1.138deg, $saturation: -11.47%, $lightness: -2.353%) !default;
    $button-toolbar-background-color-disabled: transparent !default;

    $button-toolbar-background-gradient: null !default;
    $button-toolbar-background-gradient-over: 'glossy-button-over' !default;
    $button-toolbar-background-gradient-focus: $button-toolbar-background-gradient-over !default;
    $button-toolbar-background-gradient-pressed: 'glossy-button-pressed' !default;
    $button-toolbar-background-gradient-disabled: null !default;

    $button-toolbar-background-gradient-color-stops: null !default;
    $button-toolbar-background-gradient-color-stops-over: null !default;
    $button-toolbar-background-gradient-color-stops-focus: $button-toolbar-background-gradient-color-stops-over !default;
    $button-toolbar-background-gradient-color-stops-pressed: null !default;
    $button-toolbar-background-gradient-color-stops-disabled: null !default;

    $button-toolbar-color: #333 !default;
    $button-toolbar-color-over: $button-toolbar-color !default;
    $button-toolbar-color-focus: $button-toolbar-color-over !default;
    $button-toolbar-color-pressed: $button-toolbar-color !default;
    $button-toolbar-color-disabled: lighten($button-toolbar-color, 35) !default;