What is procedural democracy and how does it differ from other types of democracy?

What is procedural democracy and how does it differ from other types of democracy? Is competitive authoritarianism and the associated concept of level playing field procedural? Explain Making reference to at least two of the required readings on the Nazis, discuss how Linz’s argument about Presidentialism does and does not apply to the Weimar case. Compare the German example to the Spanish case as described by Linz