Build a web page using an external CSS file based on the following specifications :

a) The three sections contents (header, main and footer) must be full-width and no larger than 960px (horizontally centered block).

b) Header must be 80px high, full width and fixed and will show your name on the left

side. The burger icon should appear when the browsers window is 768px or lower. Background must be black, and text white.

c) Footer must be 40px high, full width, and fixed. It should gradually change color from red to blue when the mouse hovers it.