Use filter dropshadow

Author: hojberg

public/css/app.css

@@ -32,7 +32,11 @@ input[type='radio']           { border: 0; }
 /* =MODULES
 ====================================================== */
 /* preview */
-.arrow_box                        { padding: 40px; width: 280px; height: 100px; border-radius: 6px; box-shadow: 0 1px 4px rgba(0, 0, 0, 0.3); }
+.arrow_box                        { padding: 40px; width: 280px; height: 100px; border-radius: 6px; 
+  -webkit-filter: drop-shadow(0 1px 4px rgba(0, 0, 0, 0.3));
+  -moz-filter: drop-shadow(0 1px 4px rgba(0, 0, 0, 0.3));
+  filter: drop-shadow(0 1px 4px rgba(0, 0, 0, 0.3));
+}
 
 /* logo */
 .logo                             { color: #ddf8c6; text-align: center; font-size: 54px; line-height: 54px; font-weight: bold; text-transform: uppercase; text-shadow: 0 1px 2px rgba(0, 0, 0, 0.4); }