Twerk lead font-size for mobile devices

dist/css/bootstrap.css

@@ -362,11 +362,17 @@ p {
 
 .lead {
   margin-bottom: 20px;
-  font-size: 21px;
+  font-size: 16.099999999999998px;
   font-weight: 200;
   line-height: 1.4;
 }
 
+@media (min-width: 768px) {
+  .lead {
+    font-size: 21px;
+  }
+}
+
 small {
   font-size: 85%;
 }

less/type.less

@@ -11,9 +11,13 @@ p {
 }
 .lead {
   margin-bottom: @line-height-computed;
-  font-size: (@font-size-base * 1.5);
+  font-size: (@font-size-base * 1.15);
   font-weight: 200;
   line-height: 1.4;
+
+  @media (min-width: 768px) {
+    font-size: (@font-size-base * 1.5);
+  }
 }