{dark,light,github}.styl: Make file list prettier

2% darker/lighter alternating row background colors.  I think I like it...

sites/github.styl

@@ -37,11 +37,10 @@
 .file-info-divider
     background-color highlight-extra
 .file-wrap
-    background-color()
     color()
 
     *
-        background-color()
+        background-color transparent
 
 .filter-item
     &.selected
@@ -339,12 +338,15 @@
 // ** files
 .files
     *
-        color comment
+        color()
 
     tbody
-        tr *
-            background-color()
+        tr
             border-color color-background-highlight
+        tr:nth-child(even)
+            background-color color-background-highlight-tad-extra
+        tr:nth-child(odd)
+            background-color()
 
         tr:hover *
             background-color color-background-highlight-extra-less

styl/dark.styl

@@ -11,6 +11,8 @@ color-background-highlight = base02
 color-background-highlight-extra = base01
 color-background-highlight-extra-less = lighten(color-background-highlight, 4%)
 color-background-highlight-extra-less-less = lighten(color-background-highlight, 2%)
+color-background-highlight-tad-extra = lighten(color-background, 2%)
+
 
 color-border = base00
 color-text = base0

styl/light.styl

@@ -11,6 +11,7 @@ color-background-highlight = base2
 color-background-highlight-extra = base1
 color-background-highlight-extra-less = darken(color-background-highlight, 4%)
 color-background-highlight-extra-less-less = darken(color-background-highlight, 2%)
+color-background-highlight-tad-extra = darken(color-background, 2%)
 
 color-border = base0
 color-text = base00