Why can my Muse site scroll horizontally in browser when there is no out of bounds content?

[Swandive stream]

Fastertrack.com

The background picture is set to Stretch to Browser Width as is the navigation bar back, but should not overlap it. Scrollbars are automatic. I cannot find any content that is out of bounds. Possible I may find the answer myself but cannot see it so far. I'm testing in Google Chrome.

Any idea why this is happening?

Thanks

P.s. any website feedback would be helpful, always a WIP.

[fotoroeder · Accepted solution]

Quite easy, at around 1300 px width your design leaves the canvas.

You should use those scrubbers and check, add a breakpoint, change layout in a way, that nothing is outside the canvas at any time/width.

Best Regards,

Uwe