.o-mail-SubChannelList-thread {
    --border-opacity: .5;
    background-color: mix($gray-100, $gray-200) !important;

    &:hover {
        background-color: $gray-200 !important;
    }
}

.o-mail-SubChannelList-threadLastMessage {
    display: -webkit-box;
    -webkit-line-clamp: 1;
    -webkit-box-orient: vertical;
}
