File names should not have spaces in between words.
Use camel case, underscores, or dashes
ex
starWarsPlanets.html
star-wars-planets.html
star_wars_planets.html
You have to have an index.html file.
Do not rename this file to home.html, main.html, or anything else
The servers look for an index.html file when loading web pages. It's standard.
CSS files should be linked at the top of the html files
They should be kept in a css folder
CSS should not be written inline
Javascript files should be loaded at the end of the html files
They should be kept in a javascript or js folder
Javascript should not be written inline