Compress scanner window for more space on mobile

- Reduced video box height to 150px
- Changed aspect ratio to 16:9
- Reduced padding and margins

Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>

css/scanner.css

@@ -15,14 +15,14 @@
 	background: #333;
 	border-radius: 8px;
 	overflow: hidden;
-	margin-bottom: 15px;
+	margin-bottom: 10px;
 }
 
 .scanner-video-box {
 	position: relative;
 	width: 100%;
-	aspect-ratio: 4/3;
-	max-height: 300px;
+	aspect-ratio: 16/9;
+	max-height: 150px;
 	background: #000;
 }
 
@@ -56,7 +56,7 @@
 
 /* Scanner Controls */
 .scanner-controls {
-	padding: 15px;
+	padding: 8px;
 	background: #444;
 }