.o-mail-MessageInReply-author {
    opacity: 50%;
}

.o-mail-MessageInReply-core {
    --mail-MessageInReply-messageOpacityNonHover: 50%;

    background-color: rgba($gray-100, .35) !important;

    &.o-blue {
        border-left-color: mix($gray-100, $info, 50%) !important
    }
    &.o-green {
        border-left-color: mix($gray-100, $success, 50%) !important
    }
    &.o-orange {
        border-left-color: mix($gray-100, $warning, 40%) !important
    }

    &:hover {
        filter: brightness(1.1);
    }
}