You can use something like this
or, if you want to set the width depending on screen size you can use CCS @media queries
Hope this helped
Welcome to the Q&A site for Question2Answer.
If you have a question about Q2A, please ask in English.
To report a bug, please create a new issue on Github or ask a question here with the bug tag.
If you just want to try Q2A, please use the demo site.