I've already extended some styles from Blank theme, however I haven't been able to override styles from class:
.footer.content ul > li
In my theme, I created a custom block in the footer. I can see in firebug that my CSS rules are loaded, however they are not applied since the default magento class
.footer.content ul > li takes priority over my styles.
If I disable the styles in firebug from
.footer.content ul > li then my styles are applied.