I have a full page of content (.page-content) with a sticky footer at the bottom. I need a vertical separator (the white line) that takes 100% of the .page-content height. This works.

I have a webpage with a header bar across the top. When the content of my page is too wide (typically caused by an embedded object) I would like the header bar across the top to still display across the entire width of the screen. However, when I scroll down on my page, I want this header bar to disappear from view.

I have a webpage with a header bar across the top. When the content of my page is too wide (typically caused by an embedded object) I would like the header bar across the top to still display across the entire width of the screen. However, when I scroll down on my page, I want this header bar to disappear from view.

I have a webpage with a header bar across the top. When the content of my page is too wide (typically caused by an embedded object) I would like the header bar across the top to still display across the entire width of the screen. However, when I scroll down on my page, I want this header bar to disappear from view.

I have a webpage with a header bar across the top. When the content of my page is too wide (typically caused by an embedded object) I would like the header bar across the top to still display across the entire width of the screen. However, when I scroll down on my page, I want this header bar to disappear from view.

I have a webpage with a header bar across the top. When the content of my page is too wide (typically caused by an embedded object) I would like the header bar across the top to still display across the entire width of the screen. However, when I scroll down on my page, I want this header bar to disappear from view.

This is pic

CSS

I have two elements with some text: