body,
html,
.outer-wrap { 
    height: 100%;
    width: 100%;
    margin: 0;
}

.outer-wrap {
	background: url('bg.jpg');
    background-size: cover;
    background-position: center center;
}

.outer-wrap:after {
    position: absolute;
    content: '';
    height: 100%;
    width: 100%;
    top: 0;
    left: 0;
    background-color: black;
    opacity: 0.3;
}

.logo {
    position: fixed;
    top: 40px;
    left: 40px;
    max-width: 100px;
    z-index: 9;
}