♻️ Refactor: Autogen classes and use consistent naming

- This should greatly improve consistency
- This mainly targets one of my PRs https://github.com/nunocoracao/blowfish/pull/2211

assets/css/main.css

@@ -453,46 +453,6 @@ pre {
   visibility: hidden;
 }
 
-.center-relative-left {
-  left: calc(max(-50vw, -800px) + 50%);
-}
-
-.margin-0 {
-  margin: 0;
-}
-.margin-top-\[-15px\] {
-  margin-top: -15px;
-}
-.margin-top-\[0\.5rem\] {
-  margin-top: 0.5rem;
-}
-.margin-right-\[10px\] {
-  margin-right: 10px;
-}
-.margin-left-\[0px\] {
-  margin-left: 0px;
-}
-
-.padding-main-menu {
-  padding: 2px 0 3px 0;
-}
-.padding-top-\[5px\] {
-  padding-top: 5px;
-}
-
-.z-index-\[-10\] {
-  z-index: -10;
-}
-.z-index-80 {
-  z-index: 80;
-}
-.z-index-100 {
-  z-index: 100;
-}
-.z-index-500 {
-  z-index: 500;
-}
-
 /* Offset scroll position to avoid header overlap */
 [id^="fn"],
 [id^="fnref"] {