Footer

All elements are optional
Brand logo - can be centred above the primary links (default), or to the side of the primary links
Social links - can be above the primary links (default) or down beside the legal content
Primary links - can be expander columns (default) or a simple horizontal list
Logos section
Secondary links
Legal content

Everything included - all in default layout modes

Brand logo left of primary links, Social links down with legal content, Secondary links omitted

Brand logo omitted, Primary links made simple list, Logos section omitted, Secondary links omitted

When body has 'fullwidth-header-footer' modifier class: