.blackbutton {
    background-image: linear-gradient(to bottom, @button-black-background-1 0%, @button-black-background-2 52%, @button-black-background-3 52%, @button-black-background-4 100%);
    box-shadow: 0 1px 0 @button-black-highlight inset, 0px 1px @border-highlight-strong;
    
    border: 1px solid @button-black-border-color;
    border-radius: 3px;
    color: @button-black-color;
    text-shadow: @button-black-text-shadow;
    height: 27px;
    line-height: 27px;
    padding: @button-black-padding;
    text-align : center;
    cursor : @button-black-cursor;
    font-weight: @button-black-font-weight;
    font-smoothing: @button-black-font-smoothing;
}
.blackbuttonDisabled{
    color: @button-black-disabled-color;
}
.blackbuttonFocus {
    box-shadow: 0 1px 0 @button-black-highlight inset, 0px 1px @border-highlight-strong, @button-black-focus-highlight;
}
.blackbuttonOver {
    box-shadow: 0 1px 0 @border-highlight-strong inset, 0px 1px @border-highlight-strong, 0 0 0 1000px @button-black-hover-shadow inset;
}
.blackbuttonDown {
    box-shadow: 0 0 3px 2px @button-black-active-inner-border inset;
}