added '__sidebar_width__' placeholder to style.ini

css/rtl.css

@@ -53,11 +53,11 @@ caption, legend {
 .mode_show #dokuwiki__content {
     float: left;
     margin-left: 0;
-    margin-right: -16em;
+    margin-right: -__sidebar_width__;
 }
 .mode_show #dokuwiki__content .pad {
     margin-left: 0;
-    margin-right: 16em;
+    margin-right: __sidebar_width__;
 }
 
 /*____________ design ____________*/

css/structure.css

@@ -46,7 +46,7 @@ body {
         display: none;
     }
     .mode_show #dokuwiki__aside {
-        width: 16em;
+        width: __sidebar_width__;
         float: left;
         position: relative;
         display: block;
@@ -58,11 +58,11 @@ body {
     /* make content wider when there's no sidebar */
     .mode_show #dokuwiki__content {
         float: right;
-        margin-left: -16em; /* left negative margin: width of sidebar (#dokuwiki__aside) */
+        margin-left: -__sidebar_width__;
         width: 100%;
     }
     .mode_show #dokuwiki__content .pad {
-        margin-left: 16em; /* left positive margin: width of sidebar (#dokuwiki__aside) */
+        margin-left: __sidebar_width__;
     }
 
 #dokuwiki__footer {

style.ini

@@ -59,3 +59,6 @@ __missing__        = "#f30"
 
 ; highlighting search snippets
 __highlight__      = "#ff9"
+
+; sidebar width
+__sidebar_width__       = "16em"