Create focused arena layout with main player centered

- Main player board is large and centered with cyan glow
- Opponent boards are smaller (50% scale) and positioned around edges
- Layout adapts for 1, 2, or 3+ players
- Spectator boards have reduced opacity to reduce distraction

public/css/style.css

@@ -151,21 +151,82 @@ button:active {
   color: #0f0;
 }
 
-/* Battle Grid - Responsive Layout */
+/* Battle Grid - Focused Layout */
 #battle-grid {
-  display: grid;
-  gap: 20px;
+  position: relative;
+  width: 100%;
+  height: 80vh;
+  display: flex;
   justify-content: center;
+  align-items: center;
   margin-top: 20px;
 }
 
-#battle-grid.grid-2x2 {
-  grid-template-columns: repeat(2, 1fr);
+/* Main player board - centered and large */
+.player-board.main {
+  position: relative;
+  z-index: 10;
+  transform: scale(1);
 }
 
-#battle-grid.grid-2x4 {
-  grid-template-columns: repeat(2, 1fr);
-  grid-template-rows: repeat(2, 1fr);
+/* Spectator boards - smaller and around the edges */
+.player-board.spectator {
+  position: absolute;
+  transform: scale(0.5);
+  opacity: 0.7;
+}
+
+.player-board.eliminated {
+  opacity: 0.4;
+}
+
+/* Position spectator boards around the main board */
+.player-board.spectator.top-left {
+  top: 20px;
+  left: 20px;
+}
+
+.player-board.spectator.top-right {
+  top: 20px;
+  right: 20px;
+}
+
+.player-board.spectator.bottom-left {
+  bottom: 20px;
+  left: 20px;
+}
+
+.player-board.spectator.bottom-right {
+  bottom: 20px;
+  right: 20px;
+}
+
+/* Single player - just show main board */
+#battle-grid.single-player {
+  justify-content: center;
+  align-items: center;
+}
+
+/* Two players - main centered, spectator to the right */
+#battle-grid.two-players .spectator {
+  position: static;
+  transform: none;
+  opacity: 1;
+  margin-left: 30px;
+}
+
+#battle-grid.two-players {
+  display: flex;
+  justify-content: center;
+  align-items: center;
+  gap: 30px;
+}
+
+/* Three+ players - main centered with spectators around */
+#battle-grid.multi-player {
+  display: flex;
+  justify-content: center;
+  align-items: center;
 }
 
 .player-board {
@@ -178,13 +239,18 @@ button:active {
   position: relative;
 }
 
-.player-board.active {
+.player-board.main {
   border-color: #0ff;
+  box-shadow: 0 0 30px rgba(0, 255, 255, 0.3);
+}
+
+.player-board.spectator {
+  border-color: #444;
 }
 
 .player-board.eliminated {
   border-color: #f00;
-  opacity: 0.5;
+  opacity: 0.4;
 }
 
 .player-board canvas {