hovers;

<style>
    #main {
    z-index: 1;
    left: 34%;
    top:200px;
    width:500px;
    height: 500px;
    color: #4C787E;
    font-size: 13px;
    padding: 0px;
    line-height: 11px;
    text-align: left;
    padding: 10px;
    font-family: times new roman;
    position: absolute;
    background-color: none;
    border-radius:10px;
    border-top: #000000 0px solid;
    border-left: #000000 0px solid;
    border-right: #000000 0px solid;
    border-bottom: #000000 0px solid;
    overflow: hidden;
    -webkit-transition: all 0.5s ease-out;
    -moz-transition: all 0.5s ease-out;
    -webkit-transition: all 0.5s ease-in;
    -moz-transition: all 0.5s ease-in;
    opacity:0;
    }

    #main:hover {
    opacity:0.9;
    z-index: 1;
    left:34%;
    top:300px;
    width:500px;
    height: 500px;
    color: white;
    padding: 0px;
    font-size: 13px;
    line-height: 11px;
    text-align: left;
    font-family: times new roman;
    background-color: black;
    padding: 10px;
    position: absolute;
    border-radius:10px;
    border-top: #A2A2A2 0px solid;
    border-left: #A2A2A2 0px solid;
    border-right: #A2A2A2 0px solid;
    border-bottom: #A2A2A2 0px solid;
    overflow: auto;
    -webkit-box-shadow: 0px 0px 10px rgba(0, 0, 0, 1);
    -moz-box-shadow:    0px 0px 10px rgba(0, 0, 0, 1);
    box-shadow:         0px 0px 10px rgba(0, 0, 0, 1);
    -webkit-transition: all 0.4s ease-out;
    -moz-transition: all 0.4s ease-out;
    -webkit-transition: all 0.4s ease-in;
    -moz-transition: all 0.4s ease-in;
    }
</style>

<div id="main">
wooooooooooooooords
</div>