Line-Height: 115%
that is 1.15 pages. I suspect this
IMHO
Get rid of that at the body level.
If you need a bigger line space for certain paragraphs, create a separate (p) class for those.
Images should have their own class(es) to control borders, margins/padding AND size ... (fine control) (that picture is larger than my screen on my 5" PEz) so you might want to control/Maintain aspect ratio
BTW your example does not have any link to the stylesheet... you are getting browser defaults