.tab-off-right, #tab-off-right {
    border-top-right-radius:2em;
}
.tab-on-left, #tab-on-left {
    border-top-left-radius:2em;
}
.tab-on-right, #tab-on-right {
    border-top-right-radius:2em;
}
.tab-off-left, #tab-off-left {
    border-top-left-radius:2em;
}