.main-header {
	 background-image: url(../img/bg.jpg);
	 background-repeat: no-repeat;
	 background-attachment: fixed;
	 background-position: center center; 
}

.foot {
	background-color: #888;
	min-height: 5em;
}

.poster {
	max-height: 100vh;
	max-width: 770px;
}