User:©TriMoon™/Sandbox

Separation of: Code-Data
See this thread for my suggestion.
 * User:©TriMoon™/Code
 * User:©TriMoon™/Code/Info
 * User:©TriMoon™/Code/Locodata
 * User:©TriMoon™/Code/Wagondata
 * User:©TriMoon™/Code/Locodata/Info
 * User:©TriMoon™/Code/Wagondata/Info
 * User:©TriMoon™/Code/CalculatedInfo
 * User:©TriMoon™/Data
 * User:©TriMoon™/Data/Info

CSS Grid
See:
 * Can I use: Grid
 * CSS Grid by Example
 * MDN: Basic_Concepts_of_Grid_Layout

test
Train info:
 * Track_sizing_and_minmax

 Placeholder train Steam 