html {
    height: 100%;
    background: url('/images/background.png') center center no-repeat #ffffff;
    background-size: cover;
    background-position: fixed;
}

body {
    height: 100%;
    display: flex;
    justify-content: center;
    align-items: center;
}

section.lda {
    max-width: 50%;
    min-width: 300px;
    margin: 0 auto;
    padding: 20px;
}

.message {
    font-weight: bold;
    color: Red;
}

footer {
    position: absolute;
    bottom: -50px;
    left: 0;
    right: 0;
    font-size: 12px;
    text-align: center;
}