.o-mail-DiscussContent-header {
    background-color: var(--mail-Discuss-surface-dark);
}

.o-mail-DiscussContent-headerActions button {

    &:not(.o-isActive):hover {
        background-color: mix($gray-200, $gray-300) !important;
    }
    &.o-isActive {
        background-color: $gray-300 !important;
    }
    &.o-isActive:hover {
        background-color: mix($gray-300, $gray-400) !important;
    }
}