debug css

sites/all/themes/gui/materiobasetheme/scss/layout.scss

@@ -65,6 +65,9 @@ $retina: (
 
 *{
  box-sizing: content-box;
+ &:before, &:after{
+   box-sizing: content-box;
+ }
 }
 
 html, body{
@@ -93,6 +96,23 @@ input[type="checkbox"] + label{
   margin:0;
 }
 
+p{
+  font-family: inherit;
+  font-weight: inherit;
+  font-size: inherit;
+  line-height: inherit;
+  margin-bottom: inherit;
+}
+
+a{
+  font-size: inherit;
+}
+
+.column, .columns {
+  padding: inherit;
+  float: inherit;
+}
+
 $rootminwidth : 320px;
 
 /** NIVEAU 0 */
@@ -131,7 +151,7 @@ $header-z-index:1000;
     html.no-touch .editmenu-enabled &{ @include mt(80px); }
     html.no-touch .admin-menu &{ @include mt(85px); }
   }
-  @media #{$medium-only}{
+  @media #{$small-only}{
     >.region{@include pt(5px); @include pb(5px);}
   } //change this
   z-index:999;