*
{
  margin:0;padding:0;  
}

html,body
{
    height:100%;   
}
body
{
   display: table; 
   margin: 0 auto;
   background: black;
}

.container
{  
    height: 100%;
    display: table-cell;   
    vertical-align: middle;    
}
.cent
{
    width:300px;
    height:143px;
}