html, body {
    height: 100%;
}

body {
    background: url('https://www.birramorena.com/img/bgIntro.jpg') no-repeat center center fixed;
    -webkit-background-size: cover;
    -moz-background-size: cover;
    -o-background-size: cover;
    background-size: cover;
}

#content {
    width: 100%;
    height: 100%;
    min-height: 100%;
    text-align: center;
}

#contentCenter {
    height: 100%;
    display: flex;
    align-items: center;
    text-align: center;
}

    #contentCenter div {
        width: 100%;
        text-align: center;
        color: #ffffff;
        text-shadow: 0px 1px 4px rgba(0, 0, 0, 1);
        font-weight:bold;
    }
    
    #contentCenter span, 
    #contentCenter #error {
        font-size:1.2em;
    }

    #contentCenter #error {
        font-size:1.2em;
        color: #c51f25;
    }

.btn-white {
    font-family: "Roboto Condensed",Helvetica,Arial,sans-serif;
    font-size: 13.5px;
    font-style: normal;
    font-variant: normal;
    font-weight: 500;
    line-height: 19.32px;
    margin: 2px;
    padding: 14px;
    border: 0px;
    background: #c51f25;
    color: #ffffff;
    width: 110px;
}

    .btn-white:hover {
        background: #ffffff;
        color: #c51f25;
    }