organize logo-mark styles

src/client/styles/scss/_layout.scss

@@ -157,12 +157,18 @@
   }
 }
 
-// GROWI brand logo
 .logo {
   .logo-mark {
-    &._white {
-      color: white;
-      fill: white !important;
+    svg {
+      width: $grw-navbar-height;
+      height: $grw-navbar-height;
+      padding: 12px;
+    }
+  }
+  .logo-text {
+    svg {
+      width: 156px;
+      height: $grw-navbar-height;
     }
   }
 }

src/client/styles/scss/_layout_variable.scss

@@ -1,3 +1,5 @@
+$grw-navbar-height: 50px;
+
 /* color variables */
 
 /* green */

src/client/styles/scss/theme/_override-agileadmin.scss

@@ -46,22 +46,6 @@
   }
 }
 
-.logo {
-  .logo-mark {
-    svg {
-      width: 50px;
-      height: 50px;
-      padding: 12px;
-    }
-  }
-  .logo-text {
-    svg {
-      width: 156px;
-      height: 50px;
-    }
-  }
-}
-
 /*
  * Nav
  */