Fix some styles

Author: verma

less/style.less

@@ -404,11 +404,13 @@ h4.not-first {
 }
 
 #credits {
+    background: rgba(255,255,255,0.8);
+    padding: 5px;
+    border-radius: 3px;
     position: absolute;
     right: 5px;
     bottom: 5px;
-    color: white;
-    text-shadow: 1px 1px 0px black;
+    color: black;
 
     &:before {
         content: 'Data Credits: ';