style error page

client/src/components/error_page.tsx

@@ -1,17 +1,23 @@
 import * as React from 'react'
 import { useRouteError } from "react-router-dom";
+import '../css/error_page.css'
 
 export default function ErrorPage() {
-  const error: any = useRouteError();
-  console.error(error);
+  const error: any = useRouteError()
+  console.error(error)
 
   return (
     <div id="error-page">
-      <h1>Oops!</h1>
-      <p>Sorry, an unexpected error has occurred.</p>
-      <p>
-        <i>{error.statusText || error.message}</i>
-      </p>
+      <div className="error-message">
+        <h1>Oops!</h1>
+        <p>Something unexpected happened:</p>
+        <p><code>{error.statusText || error.message}</code></p>
+        <p>Please create an issue on the <a href="https://github.com/leanprover-community/lean4game/issues" target="_blank">lean4game repo</a>.</p>
+        <div className="thought-bubble" />
+        <div className="thought-bubble" />
+        <div className="thought-bubble" />
+        <div className="thought-bubble" />
+      </div>
     </div>
-  );
+  )
 }

client/src/css/error_page.css

@@ -0,0 +1,60 @@
+#error-page {
+  height: 100%;
+  background-image: url("/RoboSurprised.png");
+  background-repeat: no-repeat;
+  background-size: contain;
+  background-position: right bottom;
+}
+
+/* these colours are matching the ones of `.messages.error` */
+.error-message{
+  border: 2px solid #D8000C;
+  background-color: #FFBABA;
+  border-radius: 1rem;
+  display: inline-block;
+  margin: 3rem;
+  padding-left: 1rem;
+  padding-right: 1rem;
+  /* color: #D8000C; */
+  position: relative;
+}
+
+
+.thought-bubble {
+  border: 2px solid #D8000C;
+  background-color: #FFBABA;
+  position: absolute;
+  display: block;
+}
+
+.thought-bubble:nth-of-type(1) {
+  bottom: -3.5rem;
+  left: 1rem;
+  border-radius: 1.2rem;
+  width: 2.4rem;
+  height: 2.4rem;
+}
+
+.thought-bubble:nth-of-type(2) {
+  bottom: -6rem;
+  left: 2.5rem;
+  border-radius: 1rem;
+  width: 2rem;
+  height: 2rem;
+}
+
+.thought-bubble:nth-of-type(3) {
+  bottom: -7.5rem;
+  left: 4.5rem;
+  border-radius: 0.8rem;
+  width: 1.6rem;
+  height: 1.6rem;
+}
+
+.thought-bubble:nth-of-type(4) {
+  bottom: -8.2rem;
+  left: 6.8rem;
+  border-radius: 0.6rem;
+  width: 1.4rem;
+  height: 1.4rem;
+}