webapp/src/components/markdownEditorInput/markdownEditorInput.scss

.MarkdownEditorInput {
    div[role=option] {
        display: flex;
        align-items: center;
    }

    span[data-testid='mentionText'] {
        background: rgba(var(--button-bg-rgb), 0.16);
        border-radius: 4px;
        color: inherit;
    }
}

.DraftEditor-root + div {
    background: rgba(var(--center-channel-bg-rgb), 1);
    box-shadow: var(--elevation-1);
    border: 1px solid rgba(var(--center-channel-color-rgb), 0.16);
    border-radius: 4px;

    > div {
        > div {
            height: 40px;
            padding: 0 20px;

            &[aria-selected='true'] {
                background: rgba(var(--center-channel-color-rgb), 0.08);
            }

            &:hover {
                background: rgba(var(--center-channel-color-rgb), 0.08);
            }

            &:active {
                background: rgba(var(--button-bg-rgb), 0.08);
            }

            .Badge {
                margin-left: 12px;
            }
        }
    }

    .code-block {
        background-color: unset;
        border: 0;
    }
}