Koala_dev's answer will work, but in case you are wondering this is the reason why it works:
.
q.html, body { <--applying this css block to everything in the
html code.
q.max-width: 100%; <--all items created must not exceed 100% of the
users screen size. (no items can be off the page
requiring scroll)
q.overflow-x: hidden; <--anything that occurs off the X axis of the
page is hidden, so that you wont see it going
off the page.
.
