Make signature pad a bit nicer, prevent turning it blue

src/css/main.css

@@ -56,15 +56,17 @@ html, body {
 
 
 .signature-wrapper {
-    background-color: white;
+    background-color: transparent;
+    background-image: linear-gradient(125deg, rgba(255, 255, 255, 0.3), rgba(255, 255, 255, 0.2) 70%);
+    box-shadow: inset 1px 1px rgba(255, 255, 255, 0.2), inset -1px -1px rgba(255, 255, 255, 0.1), 1px 3px 24px -1px rgba(0, 0, 0, 0.15);
     border-radius: 5px;
     position: relative;
     width: 400px;
     height: 200px;
     margin: 0 auto;
-    border: 1px solid rgba(0,0,0,0.5);
     /* fix bug on iOS where image sticks out right side and makes entire page scroll horiz. */
     overflow: hidden;
+    user-select: none;
 }
 
 .signature-wrapper img {