html,
body {
    height: 100%;
}

.container 
{
    height: 100%;
    width: 100%;
    display: flex;
    justify-content: center;
    align-items: center;
    /*background-image: url("images/ipad-632394_1920.jpg");*/
	background-size: cover;
	background-repeat:no-repeat;    
}
.container-box
{
	display:inline-block; 
	padding:120px; 
	background: rgba(0, 0, 0, .5);
	border: 1px solid #333;	
}