Rewrite footer markup to zib_footer_con contract: single adaptive logo
(white-src/dark-src), fcode-links HTML primary, float third column,
hidden-xs, toggle-radius contacts, miniimg structure, customize-first
footer-conter. Restyle zibll-shell CSS and drop conflicting site-footer
BEM padding so filled footer data matches Zibll layout.
Size rules were forcing display:inline-block on both footer logos with
higher specificity than the night-hide rule. Decouple display toggle,
raise selector weight, align dark hooks with header/theme.js, and drop
unused part-1 light/dark logo-img rules.
kate522