.booktable > .content
{
    width: 100%;
    position: absolute;
    left: 0px;
}

.booktable.is_admin > .content
{
    width: calc(100% - 320px - 300px);
}

.booktable > .history
{
    width: 300px;
    position: absolute;
    right: 0px;
}

.booktable.is_admin > .history
{
    right: 300px;
}


.booktable.is_admin > .admin
{
    width: 300px;
    position: absolute;
    right: 0px;
}

.booktable.is_admin > .admin > input
{
    width: 280px;
}