gistfile1.txt

/* Footer Logo */
    #logo {
    background:url("/assets/logo-flip.png") no-repeat -75px 0;
    height:80px;
    margin: 10px auto;
    width: 75px;
    -webkit-transition:background 0.2s ease-in-out;  
    -moz-transition:background 0.2s ease-in-out; 
    -o-transition:background 0.2s ease-in-out;  
    transition:background 0.2s ease-in-out;
    }
    

    #logocover {
    background:url("/assets/logo-gray.png") no-repeat 0 0;
    height:80px;
    margin: 10px auto;
    width: 75px;
    opacity:1;
    -webkit-transition:all 0.5s ease-in-out;  
    -moz-transition:all 0.5s ease-in-out; 
    -o-transition:all 0.5s ease-in-out;  
    transition:all 0.5s ease-in-out;
    }
    
    #logocover:hover {
    opacity:0;
    }