* {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
}

html, body {
    height: 100%;
}

.img-container {
    position: fixed;
    width: 100%;
    height: 100%;
    background: url('/lacolonial/images/login.jpg') no-repeat center center fixed; 
    -webkit-background-size: cover;
    -moz-background-size: cover;
    -o-background-size: cover;
    background-size: cover;
    overflow: hidden;
}