Enqueue all stylesheets in theme

Hi! I would like to enqueue all the stylesheets from the theme “Harest” properly. Right now I’ve used the @import url method where I’ve imported one stylesheet in a child-theme. Everything has worked fine but now I want to change something in the tablet/mobile view and can’t get it to work. I’ve tried to import the stylesheet that contains the particular code I want to alter but, as mentioned earlier, I can’t get it to work. Would really appreciate some help. Thanks in advance! (side note: I’ve already written in the forum for the theme but no one has replied)