Add styling to report issue buttons

Closes OwlBoard/backend#53

src/routes/more/report/+page.svelte

@@ -88,8 +88,9 @@
 
 {#if !preFlight && !isDone}
   <p>
-    Any data that you enter here will be visible publicly
+    Check for existing reports
     <a href="https://git.fjla.uk/OwlBoard/backend/issues" target="_blank">here</a>
+    before submitting a new issue.
   </p>
   <p>You will be shown all of the collected data before the form is submitted.</p>
   <form on:submit={submit}>
@@ -163,8 +164,8 @@
     max-height: 400px;
   }
   button {
-    background-color: var(--overlay-color);
-    color: white;
+    background-color: var(--island-bg-color);
+    color: var(--main-text-color);
     font-family: urwgothic, sans-serif;
     font-size: 16px;
     border: none;
@@ -172,6 +173,7 @@
     width: 25%;
     height: 30px;
     max-width: 100px;
+    box-shadow: var(--box-shadow);
   }
   h2 {
     color: white;