feat(theme): rearrange assets

_app/assets/themes/curtana/_less/app.less

@@ -738,5 +738,8 @@ body:hover .latest {
   }
 }
 
-// Import custom styles
-@import "custom";
+// Import theme modules
+@import "module-loader";
+
+// Import user custom styles
+@import "../../../_less/custom";

_app/assets/themes/curtana/_less/module-loader.less

@@ -0,0 +1,13 @@
+// Theme module loader
+
+// Import syntax highlighting theme
+@import "module-syntax";
+
+// Import style fixes for plug-ins
+@import "module-plugins";
+
+// Import print styles
+@import "module-print";
+
+// Import custom color schemes
+@import "module-schemes";

_app/assets/themes/curtana/_less/custom.less → _app/assets/themes/curtana/_less/module-schemes.less

@@ -1,13 +1,4 @@
-// Your custom styles here
-
-// Import syntax highlighting theme
-@import "syntax";
-
-// Import style fixes for plug-ins
-@import "plugins";
-
-// Import print styles
-@import "print";
+// Custom color schemes
 
 // Change @link-color can change to whole theme color scheme
 // All other vaiables in `app.less` can be overwritten here
@@ -71,20 +62,3 @@
   h5 { font-size: 72%;  opacity: .5; }
   h6 { font-size: 60%;  opacity: .4; }
 }
-
-// amsf.github.io color scheme
-@link-color: #ff00b4;
-@background-color: #fff;
-@text-color: #000;
-@code-color: darken(spin(@link-color, 200), 10%);
-
-// amsf.github.io homepage logo
-.amsf-logo {
-  width: 80%;
-  height: auto;
-}
-
-.amsf-title {
-  text-indent: -999999px;
-  line-height: 0 !important;
-}