Another bunch of styling fixes

svelte/src/file_viewer/EmbedWindow.svelte

@@ -157,6 +157,11 @@ const update_example = () => {
 			<ThemePicker on:theme_change={e => set_style(e.detail)}></ThemePicker>
 		{:else}
 			<h3>Direct link</h3>
+			<p>
+				Hotlinking is only supported on <a href="/#pro">Pro</a>
+				accounts. If this file was not uploaded with a Pro account the
+				download will be blocked.
+			</p>
 			<p>
 				You can directly download the file from this link without using the
 				file viewer:

svelte/src/file_viewer/viewers/TextBlock.svelte

@@ -14,8 +14,7 @@ export let center = false
 	padding-left: 8px;
 	vertical-align: middle;
 
-	color: var(--layer_1_text_color);
-	background-color: rgba(0, 0, 0, 0.5);
+	background-color: var(--shaded_background);
 	border-radius: 8px;
 	padding: 8px;
 }