consider using a reset.css file to let your project start from completely blank slate. this file would be used to reset all of the default styling given by various browsers to ensure that you're always starting from the same place and know what to expect.
one area in particular that this might have an immediate effect on if the overall margin on the body element. in many browsers, body is given some small margin which gives a small gap around the entire edge of the page. setting this margin to 0px in a reset file would let your content bump right up against the edges of the screen.
edit - it looks like you do link to a reset file in your html, but it doesn't seem to be included in the resources folder.
consider using a reset.css file to let your project start from completely blank slate. this file would be used to reset all of the default styling given by various browsers to ensure that you're always starting from the same place and know what to expect.
one area in particular that this might have an immediate effect on if the overall margin on the body element. in many browsers, body is given some small margin which gives a small gap around the entire edge of the page. setting this margin to 0px in a reset file would let your content bump right up against the edges of the screen.
edit - it looks like you do link to a reset file in your html, but it doesn't seem to be included in the resources folder.