Optimize "Section Header"

- decrease label height
- decrease whitespace between heading and label on medium screen
Revert "Always align "Global Footer" contents"

This reverts commit 3e4237d93ebdad1984042caf70a66d9aa89dee22.
Hang watermark on large screen
Optimize "Footlinks" position on large screen
Place "Footlinks" immediately after watermark
Don't change "Footlinks" color
Remove "Global Footer" background color

This changes also remove "Iine!" background color.
Increase very bottom whitespace
Optimize watermark position
Add dashed border to "Global Footer"

This changes also add dashed border to "Iine!".
Lighten colors
Rename variables for ratio

`$ratio-h1` etc. are considered harmful.
Remove obsolete variables
Add line breaks
Version 6.45.3