html,
body {
    width: 100%;
    height: 100%;
}

body {
    background-image: url('images/background.jpg');
    background-position: center center;
    background-attachment: fixed;
    background-size: cover;
    -webkit-background-size: cover;
    -moz-background-size: cover;
}

.jumbotron {
    background: rgba(255, 255, 255, 0.7);
}


#thankyou {
    display: none;
}
#thankyou strong {
    color: red;
}

.text-vertical-center {
    display: table-cell;
    text-align: center;
    vertical-align: middle;
}


.header {
    display: table;
    position: relative;
    width: 100%;
    height: 100%;
    background: url(images/background.jpg) no-repeat center center scroll;
    -webkit-background-size: cover;
    -moz-background-size: cover;
    background-size: cover;
    -o-background-size: cover;
}