.footer {
    flex: 0 0 auto;
}
.footer__link {
    color: inherit;
    text-decoration: none;
}
.footer__link:focus,
.footer__link:hover {
    text-decoration: underline;
}
.footer__wrapper {
    max-width: var(--site-max-width);
    margin: 0 auto;
    text-align: center;
    font-size: .9em;
    line-height: 1.5em;
    padding: 1em 0;
}
.footer__background {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    mask-image: linear-gradient(180deg, transparent 10%, var(--background-colour) 100%);
    -webkit-mask-image: linear-gradient(180deg, transparent 10%, var(--background-colour) 100%);
    background: var(--background-pattern);
    background-color: var(--header-accent-colour);
    background-blend-mode: multiply;
}