How to change size of data entry fields in timesheet

Hello and thanks for looking! So I am interested in changing the size of the Project field as well as the Activity Type fields so that they have more room to populate more characters to make it easier to see extended project and task titles – this will make it much easier for employees to choose through the populating datasets from the Projects and Tasks in ERPnext. I figure it is in a css file somewhere, but also wonder if there is a way to make it stick through updates, etc - any input appreciated!