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 {

public/js/app.js

@@ -115,12 +115,14 @@ function setupKeyboardControls() {
 }
 
 function updateBattleGridLayout(playerCount) {
-  ui.displays.battleGrid.classList.remove('grid-2x2', 'grid-2x4');
+  ui.displays.battleGrid.classList.remove('single-player', 'two-players', 'multi-player');
 
-  if (playerCount <= 4) {
-    ui.displays.battleGrid.classList.add('grid-2x2');
+  if (playerCount === 1) {
+    ui.displays.battleGrid.classList.add('single-player');
+  } else if (playerCount === 2) {
+    ui.displays.battleGrid.classList.add('two-players');
   } else {
-    ui.displays.battleGrid.classList.add('grid-2x4');
+    ui.displays.battleGrid.classList.add('multi-player');
   }
 }
 

public/js/renderer.js

@@ -101,8 +101,19 @@ class TetrisRenderer {
       }
     }
 
-    // Update board state classes
+    // Update board state classes (preserving main/spectator/position classes)
+    const wasMain = element.classList.contains('main');
+    const wasSpectator = element.classList.contains('spectator');
+    const positions = ['top-left', 'top-right', 'bottom-left', 'bottom-right'];
+    const wasPos = positions.some(p => element.classList.contains(p));
     element.classList.remove('active', 'eliminated');
+    if (wasMain) element.classList.add('main');
+    if (wasSpectator) element.classList.add('spectator');
+    if (wasPos) {
+      positions.forEach(p => {
+        if (element.classList.contains(p)) element.classList.add(p);
+      });
+    }
     if (gameState && gameState.eliminated) {
       element.classList.add('eliminated');
     }
@@ -212,16 +223,30 @@ class TetrisRenderer {
   }
 
   setActivePlayer(playerId) {
-    // Remove active class from all boards
-    this.boards.forEach((boardData) => {
-      boardData.element.classList.remove('active');
+    // Remove main class from all boards
+    this.boards.forEach((boardData, id) => {
+      boardData.element.classList.remove('active', 'main');
+      boardData.element.classList.remove('spectator', 'top-left', 'top-right', 'bottom-left', 'bottom-right');
     });
 
-    // Add to current player
-    const boardData = this.boards.get(playerId);
-    if (boardData) {
-      boardData.element.classList.add('active');
+    // Add main class to current player
+    const mainBoard = this.boards.get(playerId);
+    if (mainBoard) {
+      mainBoard.element.classList.add('main');
     }
+
+    // Add spectator class to other boards with positions
+    const positions = ['top-left', 'top-right', 'bottom-left', 'bottom-right'];
+    let posIndex = 0;
+    this.boards.forEach((boardData, id) => {
+      if (id !== playerId) {
+        boardData.element.classList.add('spectator');
+        if (posIndex < positions.length) {
+          boardData.element.classList.add(positions[posIndex]);
+          posIndex++;
+        }
+      }
+    });
   }
 
   triggerShake(playerId) {