Reply To: Why isn't my navbar's collapse menu popping up?

[Atelierbram]

When you move the height value on nav.top-bar to a less specific selector, then it will be visible on clicking the menu-icon.

html>body>div.header>nav.top-bar {
  /* height: 60px;  <- get rid of this one */ 
}
.top-bar {
  height: 60px;
}