body::after{
    content: "";
    background-image: url('./images/55.jpg');
    background-repeat: no-repeat;
    background-size:cover;
    opacity: 0.4;
    top: 0;
    left: 0;
    bottom: 0;
    right: 0;
    position: absolute;
    z-index: -1;
}

div.header-logo {
    justify-content: center;
}

img.header-logo {
    content:url('./header-logo.png');
}

div.header-logo::after {
    /* content: 'Sample text';
    font-size: 2.8em;
    margin-top: 0.2em;
    margin-left: 0.5em; */
}