Add note about path/to/your.css - addresses Issue #14

core/style.md

@@ -11,7 +11,7 @@ There are two ways to write CSS for a document.
 
 An internal CSS code can be typed in the head section of the code.
 The coding starts with the style tag, written just before the closing
-head tag.
+`</head>` tag.
 
     <style type="text/css">
         ....
@@ -20,16 +20,26 @@ head tag.
 This way is good when you do not have many styles. In such a case, it is easier
 to refer to because the browser has no need to load another file.
 
-The second way to write CSS for a document is with an "external" CSS file. First, you open a new file in your editor
-and save it with a .CSS extension.
-Then, you can link that to a HTML document using the following syntax. 
-Write it just after the meta tag.
+The second way to write CSS for a document is with an "external" CSS  file. 
 
-    <link href="path/toyour/file.css" rel="stylesheet">
+Open a new file in your editor and save it with a .CSS extension in the same
+directory as your HTML file (give it a name like `styles.css` for now.)
+
+Then you can link that to an HTML document using the following syntax. 
+Write it just after the meta tag, before the closing `</head>` tag.
+
+    <link href="styles.css" rel="stylesheet">
 
 This is the best way if you have a lot of CSS to write and you want to 
 keep it organized.
 
+**TIP:** The link reference ("href") to `"styles.css"` is a path relative 
+to the HTML document. So in this case `styles.css` is located in the same 
+directory, but you could use a name like `"styles/mystyle.css"` if you 
+put the CSS file into a subdirectory. You can even use full URLs like 
+`"http://myawesomesite.com/styles/mystyle.css"`, but it's best to avoid 
+this if you can use a relative path instead.
+
 Once you link your external CSS file, open your HTML file in the
 browser, open your console and go to the Network tab.
 You should see the path of your CSS file and under the STATUS column