css help new

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Bids
13
Avg Bid (USD)
$6 / hr
Project Budget (USD)
$2 - $8 / hr

Project Description:
I am trying to build a website and my content container works ( is displayed) exactly how I want it on my 17inch laptop. However when i move it to my desktop in moves to the left and comes down to the bottom.

How do i make an element change in accordance to the resolution of a screen.

/* Entire drop-up menu, show on mouse hover */
#footer_menu li:hover .one_column_layout,
#footer_menu li:hover .two_column_layout,
#footer_menu li:hover .three_column_layout
{

display: block;
position: absolute;
margin: auto;
bottom: 40px;
border: 1px solid #111111;
border-radius: 7px 7px 0px 0px;
background: rgba(0,0,0,0.5);
bottom: 90px;
left: 500px;
width: 500px;
padding-left: 50px;
padding-right: 54px;
font-size: 12px;
left: 400px;
}

Hours of work: Unspecified Project Duration: 1 - 4 weeks Skills required:
CSS
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