improve demo styling

docs/src/components/Demo/style.scss

@@ -1,5 +1,4 @@
 .demo {
-  background-color: $colorWhite;
   overflow: hidden;
   border-radius: 0.5rem;
 
@@ -9,6 +8,7 @@
     border-top-right-radius: inherit;
     border-bottom-width: 0;
     color: $colorBlack;
+    background-color: $colorWhite;
   }
 
   &__source {
@@ -55,15 +55,28 @@
     justify-content: space-between;
     width: 100%;
     padding: 0.5rem 1.5rem;
+    font-size: 0.85rem;
     border: 1px solid rgba($colorWhite, 0.1);
     border-bottom-left-radius: inherit;
     border-bottom-right-radius: inherit;
     border-top-width: 0;
     background-color: $colorBlack;
+    white-space: nowrap;
+  }
+
+  &__name {
+    display: none;
+
+    @media (min-width: 600px) {
+      display: block;
+      overflow: hidden;
+      text-overflow: ellipsis;
+      padding-right: 0.5rem;
+    }
   }
 
   &__link {
-    // text-align: right;
+    margin-left: auto;
   }
 
   &__error {