SWAPNIL. KAMBLE

Creating pixel-perfect mockups means using a static design tool, like Photoshop, to create your design as you want it to appear in the browser — down to the last pixel. Your margins should be consistent and exactly as wide as you want them to be. Your typography decisions need to be made at the outset and adhered to during the mockup process — you should  know what size, color and font ever heading tag is going to use. The list goes on, but in short, you’re going for consistency and final product-like perfection.

Example of Health Care Company Dash Board

and the Responsive Mock-Up of it.