add a border to tab panes, seamless w/ tabs

h/sass/app.scss

@@ -197,7 +197,7 @@ svg { -webkit-tap-highlight-color: rgba(255, 255, 255, 0); }
 .sheet {
   border: solid 1px $grayLighter;
   margin-top: 2em;
-  padding: 1em;
+  padding-top: 1em;
   position: absolute;
   width: 100%;
 }

h/sass/common.scss

@@ -128,8 +128,16 @@ label {
 }
 
 .tab-pane {
+  background: $bodyBackground;
+  border: solid thin $grayLighter;
   display: none;
-  &.active { display: inherit !important; }
+  margin-top: -1px;  // Pull up and under tabs
+  padding: 1em;
+  position: relative;
+
+  &.active {
+    display: inherit !important;
+  }
 }
 
 .red {
@@ -314,6 +322,7 @@ label {
 
 .nav-tabs {
   @include pie-clearfix;
+  margin: 0 .5em;
 
   & > li > a {
     cursor: pointer;