problem of style sheet please read my full topic then tell me the solution

[earnmoneybb]

need help

i created a woo comerce shop and installed a new theme captiva wordpress premium theme.

all is fine but when i enter the adress of my site in browser and press enter and site load fine but its theme size is more then the normal size. the primary menu show conjusted and narrow.

but when i do a zoom out Using "ctrl" plus " - " (minus sign) the site looks fine i am attaching the both images. please help me to solve out this problem.

best regards