Added normalize.css to reset the default CSS of browsers in order to force a default behaviour of ABCD independent of the browser type.
Added spaces.css to provide standardized margins and paddings in 5 size possibilities. Its use is simple. For margin use the prefix m and for padding the prefix p. Then choose the size separated by a hyphen or the direction and size. Example
for padding: 1rem use:
<img src="img.jpg" class="p-3">
or for top margin use (margin-top):
<img src="img.jpg" class="mt-3">
Fixed header and footer for cases where there is an empty parameter in abcd.def file
for padding: 1rem use:
<img src="img.jpg" class="p-3">or for top margin use (margin-top):
<img src="img.jpg" class="mt-3">