.header_height,
.footer_height
{
   height: 2.2em;
   min-height: 2.2em;
   max-height:2.2em;
   overflow:auto;
}

.main_body_height
{
    height: calc(100% - 2.2em);
    min-height: calc(100% - 2.2em);
    max-height: calc(100% - 2.2em);
    overflow:auto;
}

.main_body_double_height
{
    height: calc(100% - 4.4em);
    min-height: calc(100% - 4.4em);
    max-height: calc(100% - 4.4em);
    overflow:auto;
}

.ease
{
    transition: all 0.25s ease-out;
}

.hidden
{
    width:0 !important;
    overflow:hidden !important;
}