more CSS tweaks

README.md

@@ -250,7 +250,7 @@ Better yet, here is a SASS code snippet, you can use sites like [sassmeister.com
 ```sass
 $columns: 12;
 @function fixed($float) {
-  @return calc(round($float * 1000) / 1000);
+  @return calc(round($float * 100) / 100); // total 4 digits being %
 }
 .grid-stack-#{$columns} > .grid-stack-item {
 

src/gridstack-extra.scss

@@ -6,19 +6,16 @@ $gridstack-columns-start: 2 !default;
 $gridstack-columns: 11 !default;
 
 @function fixed($float) {
-  @return calc(round($float * 1000) / 1000);
+  @return calc(round($float * 100) / 100); // total 4 digits being %
 }
 
 @mixin grid-stack-items($columns) {
-  .grid-stack-#{$columns} {
+  .grid-stack-#{$columns} > .grid-stack-item {
+    min-width: fixed(calc(100% / $columns));
 
-    > .grid-stack-item {
-      min-width: fixed(calc(100% / $columns));
-
-      @for $i from 1 through $columns - 1 {
-        &[gs-x='#{$i}'] { left: fixed(calc(100% / $columns) * $i); }
-        &[gs-w='#{$i+1}'] { width: fixed(calc(100% / $columns) * ($i+1)); }
-      }
+    @for $i from 1 through $columns - 1 {
+      &[gs-x='#{$i}'] { left: fixed(calc(100% / $columns) * $i); }
+      &[gs-w='#{$i+1}'] { width: fixed(calc(100% / $columns) * ($i+1)); }
     }
   }
 }

src/gridstack.scss

@@ -7,7 +7,7 @@ $columns: 12 !default;
 $animation_speed: .3s !default;
 
 @function fixed($float) {
-  @return calc(round($float * 1000) / 1000);
+  @return calc(round($float * 100) / 100); // total 4 digits being %
 }
 
 @mixin vendor($property, $value...){