Adjust Magento Site Screen Resolution

Adjust Magento Site Screen Resolution

My magento website has some problem with its screen resolution.

When i open my Magento website on Wide Screen Monitor. It opens Perfect

But When i open my Magento website on Standard Screen Monitor. The theme goes extra Zoom In. and when i zoom out the screen.. then it becomes perfect.

I want it to optimized with all type of screen resolutions

I think the problem is with CSS file

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Requirements

Adjust Magento Site Screen Resolution

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Skills Required

Magento Php Css