started map: drawing concernement with entities and contours

src/assets/layout.scss

@@ -4,12 +4,18 @@ html,body{
 
 }
 
+
+@mixin layout-row{
+  box-sizing: content-box;
+  max-width: 1920px;
+  margin: 0 auto;
+  padding: 0 1rem;
+}
+
 #app {
   box-sizing: border-box;
-  max-width: 1920px;
+  width: 100vw;
   height: 100vh;
-  margin: 0 auto;
-  padding: 1rem;
 
   font-weight: normal;
 
@@ -18,11 +24,24 @@ html,body{
 }
 
 #header{
-  flex: 0 0 5rem;
+  flex: 0 0 auto;
+  padding: 1rem 0;
+  >.row{
+    @include layout-row();
+  }
 }
 
 #main-content{
   flex: 1 1 auto;
-
+  overflow-x: hidden;
+  overflow-y: auto;
+  // padding: 1rem 0;
+  #map-concernements{
+    width:100%;
+    height:100%;
+  }
+  >.row{
+    @include layout-row();
+  }
 }