Add dark mode, viewport meta

t0reg.py

@@ -20,6 +20,8 @@ def help(nid):
         '<br><button type="submit">Submit</button></form>'.format(URL, nid)
     )
     return """
+<meta name="color-scheme" content="light dark" />
+<meta name="viewport" content="width=1%" />
 <pre>
                         reg.t0.vc
 NAME