html, body {
    margin: 0;
    padding: 0;
    height: 100%;
    width: 100%;
}

body {
    background: url('images/bg.jpg') center center / cover no-repeat fixed;
    display: flex;
    flex-direction: column;
    justify-content: flex-end;
    font-family: Arial, sans-serif;
}

footer {
    display: flex;
    justify-content: space-between;
    padding: 20px;
    position: fixed;
    bottom: 0;
    width: 100%;
    box-sizing: border-box;
}

footer a {
    font-weight: bold;
    color: black;
    font-size: 12px;
    text-decoration: none;
    transition: opacity 0.2s ease;
}

footer a:hover {
    opacity: 0.6;
}

.visually-hidden {
    position: absolute;
    left: -9999px;
    top: auto;
    width: 1px;
    height: 1px;
    overflow: hidden;
}

@media (max-width: 768px) {
    body {
        background-attachment: scroll;
        background-size: auto 100%;
    }
}