studio - header UI: in progress markup changes WIP

cms/static/sass/_base.scss

@@ -50,6 +50,40 @@ h1 {
 // ====================
 
 // layout - basic
+.wrapper-mast {
+  margin: 0;
+  padding: 0 $baseline;
+  position: relative;
+  
+  .mast {
+      @include clearfix();
+      @include font-size(16);
+      position: relative;
+      max-width: $fg-max-width;
+      min-width: $fg-min-width;
+      width: flex-grid(12);
+      margin: 0 auto $baseline auto;
+      border-bottom: 1px solid $gray-l4;
+      padding-bottom: ($baseline/2);
+      color: $gray-d2;
+
+      .title-sub {
+        @include font-size(14);
+        display: block;
+        margin: 0;
+        color: $gray-l2;
+      }
+
+      .title, .title-1 {
+        @include font-size(32);
+        margin: 0;
+        padding: 0;
+        font-weight: 600;
+        color: $gray-d3;
+      }
+    }
+}
+
 .wrapper-content {
   margin: 0;
   padding: 0 $baseline;