Update styles.css

styles.css

@@ -1,9 +1,16 @@
 .content {
-  background: #FFEEEE;
-  background: -webkit-linear-gradient(to right, #DDEFBB, #FFEEEE);
-  background: linear-gradient(to right, #DDEFBB, #FFEEEE);
+  /* background: #FFEEEE;*/
+  /* background: -webkit-linear-gradient(to right, #DDEFBB, #FFEEEE);*/
+  /* background: linear-gradient(to right, #DDEFBB, #FFEEEE);*/
+  background: #43C6AC;  /* fallback for old browsers */
+  background: -webkit-linear-gradient(to right, #F8FFAE, #43C6AC);  /* Chrome 10-25, Safari 5.1-6 */
+  background: linear-gradient(to right, #F8FFAE, #43C6AC); /* W3C, IE 10+/ Edge, Firefox 16+, Chrome 26+, Opera 12+, Safari 7+ */
 }
 
 .panel-header {
   color: black;
+}
+
+.panel {
+  background: rgba(150, 150, 150, 0.5);
 }