Sometimes you need specific changes on only one question. For that you can add css to the question source of that question like this:
Limesurvey “knows” that it should not show this code, but in stead it interpretes it, so you can style this question.
But be aware, if you do it this way, the css works for the whole page, so also for other questions that are on your page (when you display the survey on a group-by-group basis or all-in-one). If you want to target only this specific question, do it like this:
You see: the ID of the question is added, this will define that the css that you use is only applied to the current question. No need for you to replace the letters QID with the actual question number, LimeSurvey will do that for you.