erp5_no_style: grid

bt5/erp5_no_style/SkinTemplateItem/portal_skins/erp5_no_style/nostyle.css.css

 body {
   display: grid;
-  grid-template-columns: repeat(3, 1fr);
+  grid-template-raws: repeat(3, 1fr);
 }
 body > nav#sitemap {
-  grid-column-start: 1;
-  grid-column-end: 4;
   grid-row: 1;
   background-color: #DDD;
   display: flex;
@@ -33,16 +31,12 @@ body > nav#sitemap a:not(:first-child) {
   padding: 0 1em;
 }
 body main {
-  grid-column-start: 1;
-  grid-column-end: 4;
   grid-row: 2;
 }
 body main fieldset {
   border: none;
 }
 body > nav#language {
-  grid-column-start: 1;
-  grid-column-end: 4;
   grid-row: 3;
   background-color: #DDD;
   display: flex;

bt5/erp5_no_style/SkinTemplateItem/portal_skins/erp5_no_style/nostyle.less.css

@@ -30,20 +30,15 @@
 
 body {
   display: grid;
-  grid-template-columns: repeat(3, 1fr); 
+  grid-template-raws: repeat(3, 1fr); 
 
   > nav#sitemap {
-    // First row, all columns
-    grid-column-start: 1; 
-    grid-column-end: 4;
     grid-row: 1;
 
     .flattenNav();
   }
 
   main {
-    grid-column-start: 1; 
-    grid-column-end: 4; 
     grid-row: 2;
 
     fieldset {
@@ -51,9 +46,7 @@ body {
     }
   }
 
-  > nav#language { 
-    grid-column-start: 1; 
-    grid-column-end: 4; 
+  > nav#language {
     grid-row: 3;
 
     .flattenNav();