From 622a7e409471a3431a38084822793b8e32bc61be Mon Sep 17 00:00:00 2001
From: DeNNiiInc <dennii.inc@gmail.com>
Date: Mon, 22 Dec 2025 17:39:43 +1100
Subject: [PATCH] Add surrender and rematch UI - Part 1

- Add surrender button to game controls
- Add game-over modal with stats and rematch option
- Add surrender confirmation modal
- Add all CSS styling for new modals and buttons
- Add surrender-rematch.js with global helper functions
- Update multiplayer.js constructor to track opponent for rematch
---
 index.html                   | 285 ++++++++++++++++++++++++++---------
 multiplayer-styles.css       | 197 ++++++++++++++++++++++++
 multiplayer.js               |   3 +
 surrender-rematch.js         |  68 +++++++++
 temp-multiplayer-methods.txt |  71 +++++++++
 5 files changed, 554 insertions(+), 70 deletions(-)
 create mode 100644 surrender-rematch.js
 create mode 100644 temp-multiplayer-methods.txt

diff --git a/index.html b/index.html
index caec664..fa49567 100644
--- a/index.html
+++ b/index.html
@@ -45,10 +45,19 @@
       <main class="game-container">
         <!-- Game Mode Toggle -->
         <div class="mode-selector">
-          <button class="mode-btn active" id="localModeBtn" onclick="toggleGameMode('local')">
+          <button
+            class="mode-btn active"
+            id="localModeBtn"
+            onclick="toggleGameMode('local')"
+          >
             🎮 Local Play
           </button>
-          <button class="mode-btn" id="multiplayerModeBtn" onclick="toggleGameMode('multiplayer')" disabled>
+          <button
+            class="mode-btn"
+            id="multiplayerModeBtn"
+            onclick="toggleGameMode('multiplayer')"
+            disabled
+          >
             🌐 Multiplayer
           </button>
         </div>
@@ -74,11 +83,17 @@
                   <span class="player-marker" id="currentPlayer">X</span>
                 </div>
                 <!-- Status text integrated here -->
-                <span class="status-text-small" id="statusMessage">Player X starts</span>
+                <span class="status-text-small" id="statusMessage"
+                  >Player X starts</span
+                >
               </div>
 
               <!-- Right Side: Player Identity (Multiplayer only) -->
-              <div class="status-right" id="playerIdentitySection" style="display: none;">
+              <div
+                class="status-right"
+                id="playerIdentitySection"
+                style="display: none"
+              >
                 <span class="label">You are:</span>
                 <div class="player-display">
                   <span class="player-marker" id="playerIdentity">?</span>
@@ -113,6 +128,27 @@
             </svg>
             New Game
           </button>
+
+          <button
+            class="surrender-btn"
+            id="surrenderBtn"
+            style="display: none"
+            onclick="confirmSurrender()"
+          >
+            <svg
+              width="20"
+              height="20"
+              viewBox="0 0 24 24"
+              fill="none"
+              stroke="currentColor"
+              stroke-width="2"
+            >
+              <path
+                d="M3 3h2l.4 2M7 13h10l4-8H5.4M7 13L5.4 5M7 13l-2.293 2.293c-.63.63-.184 1.707.707 1.707H17m0 0a2 2 0 100 4 2 2 0 000-4zm-8 2a2 2 0 11-4 0 2 2 0 014 0z"
+              />
+            </svg>
+            Surrender
+          </button>
         </div>
 
         <div class="board-wrapper">
@@ -120,7 +156,11 @@
         </div>
 
         <!-- Multiplayer Panel -->
-        <div id="multiplayerPanel" class="multiplayer-panel" style="display: none;">
+        <div
+          id="multiplayerPanel"
+          class="multiplayer-panel"
+          style="display: none"
+        >
           <div class="player-stats-card">
             <h3>Your Stats</h3>
             <div class="stats-grid">
@@ -191,20 +231,39 @@
           <span class="db-status-value" id="dbTimestamp">--</span>
         </div>
         <div class="db-status-item">
-          <button class="db-retry-btn" id="dbRetryBtn" onclick="window.dbStatusMonitor && window.dbStatusMonitor.retryConnection()" title="Retry SQL Connection">
-            <svg width="16" height="16" viewBox="0 0 24 24" fill="none" stroke="currentColor" stroke-width="2">
-              <path d="M21.5 2v6h-6M2.5 22v-6h6M2 11.5a10 10 0 0 1 18.8-4.3M22 12.5a10 10 0 0 1-18.8 4.2"/>
+          <button
+            class="db-retry-btn"
+            id="dbRetryBtn"
+            onclick="window.dbStatusMonitor && window.dbStatusMonitor.retryConnection()"
+            title="Retry SQL Connection"
+          >
+            <svg
+              width="16"
+              height="16"
+              viewBox="0 0 24 24"
+              fill="none"
+              stroke="currentColor"
+              stroke-width="2"
+            >
+              <path
+                d="M21.5 2v6h-6M2.5 22v-6h6M2 11.5a10 10 0 0 1 18.8-4.3M22 12.5a10 10 0 0 1-18.8 4.2"
+              />
             </svg>
             Retry
           </button>
         </div>
       </div>
-      
+
       <!-- Database Status Details (for testing phase) -->
-      <div class="db-status-details" id="dbStatusDetails" style="display: none;">
+      <div class="db-status-details" id="dbStatusDetails" style="display: none">
         <div class="db-details-header">
           <span class="db-details-title">🔍 SQL Connection Details</span>
-          <button class="db-details-close" onclick="document.getElementById('dbStatusDetails').style.display='none'">×</button>
+          <button
+            class="db-details-close"
+            onclick="document.getElementById('dbStatusDetails').style.display='none'"
+          >
+            ×
+          </button>
         </div>
         <div class="db-details-content" id="dbDetailsContent">
           <div class="db-detail-item">
@@ -221,14 +280,16 @@
           </div>
           <div class="db-detail-item">
             <span class="db-detail-label">Error:</span>
-            <span class="db-detail-value db-detail-error" id="detailError">None</span>
+            <span class="db-detail-value db-detail-error" id="detailError"
+              >None</span
+            >
           </div>
           <div class="db-detail-logs" id="detailLogs"></div>
         </div>
       </div>
-      
+
       <!-- SQL Error Display (Testing Phase) -->
-      <div class="sql-error-banner" id="sqlErrorBanner" style="display: none;">
+      <div class="sql-error-banner" id="sqlErrorBanner" style="display: none">
         <div class="sql-error-header">
           <span class="sql-error-icon">⚠️</span>
           <span class="sql-error-title">SQL Connection Error</span>
@@ -256,15 +317,97 @@
     <div class="modal-overlay" id="usernameModal">
       <div class="modal-content username-modal">
         <h2>Enter Your Username</h2>
-        <p class="modal-subtitle">Choose a family-friendly name (3-20 characters)</p>
-        <input type="text" id="usernameInput" placeholder="Your username" maxlength="20" />
-        <div id="usernameError" class="error-message" style="display: none;"></div>
+        <p class="modal-subtitle">
+          Choose a family-friendly name (3-20 characters)
+        </p>
+        <input
+          type="text"
+          id="usernameInput"
+          placeholder="Your username"
+          maxlength="20"
+        />
+        <div
+          id="usernameError"
+          class="error-message"
+          style="display: none"
+        ></div>
         <button class="submit-btn" onclick="submitUsername()">
           Join Multiplayer
         </button>
       </div>
     </div>
 
+    <!-- Game Over Modal -->
+    <div class="modal-overlay" id="gameOverModal">
+      <div class="modal-content game-over-modal">
+        <div class="game-over-icon" id="gameOverIcon">🎮</div>
+        <h2 id="gameOverTitle">Game Over</h2>
+        <p class="game-over-subtitle" id="gameOverMessage">
+          Thanks for playing!
+        </p>
+
+        <div class="game-over-stats">
+          <div class="stat-item">
+            <span class="stat-label">Wins:</span>
+            <span class="stat-value" id="gameOverWins">0</span>
+          </div>
+          <div class="stat-item">
+            <span class="stat-label">Losses:</span>
+            <span class="stat-value" id="gameOverLosses">0</span>
+          </div>
+          <div class="stat-item">
+            <span class="stat-label">Draws:</span>
+            <span class="stat-value" id="gameOverDraws">0</span>
+          </div>
+        </div>
+
+        <div class="game-over-actions">
+          <button
+            class="rematch-btn"
+            id="rematchBtn"
+            onclick="requestRematch()"
+          >
+            <svg
+              width="20"
+              height="20"
+              viewBox="0 0 24 24"
+              fill="none"
+              stroke="currentColor"
+              stroke-width="2"
+            >
+              <path
+                d="M21.5 2v6h-6M2.5 22v-6h6M2 11.5a10 10 0 0 1 18.8-4.3M22 12.5a10 10 0 0 1-18.8 4.2"
+              />
+            </svg>
+            Challenge Again
+          </button>
+          <button class="lobby-btn" onclick="returnToLobby()">
+            ← Return to Lobby
+          </button>
+        </div>
+      </div>
+    </div>
+
+    <!-- Surrender Confirmation Modal -->
+    <div class="modal-overlay" id="surrenderModal">
+      <div class="modal-content surrender-modal">
+        <div class="surrender-icon">⚠️</div>
+        <h2>Surrender Game?</h2>
+        <p class="modal-subtitle">
+          Are you sure you want to surrender? This will count as a loss.
+        </p>
+        <div class="surrender-actions">
+          <button class="confirm-surrender-btn" onclick="executeSurrender()">
+            Yes, Surrender
+          </button>
+          <button class="cancel-surrender-btn" onclick="cancelSurrender()">
+            Cancel
+          </button>
+        </div>
+      </div>
+    </div>
+
+    <script src="surrender-rematch.js"></script>
     <script src="storage.js"></script>
     <script src="db-status.js"></script>
     <script src="multiplayer.js"></script>
@@ -272,51 +415,51 @@
     <script>
       // Game mode toggling
       function toggleGameMode(mode) {
-        const localBtn = document.getElementById('localModeBtn');
-        const multiplayerBtn = document.getElementById('multiplayerModeBtn');
-        const gameControls = document.getElementById('gameControls');
-        const multiplayerPanel = document.getElementById('multiplayerPanel');
-        const boardWrapper = document.querySelector('.board-wrapper');
+        const localBtn = document.getElementById("localModeBtn");
+        const multiplayerBtn = document.getElementById("multiplayerModeBtn");
+        const gameControls = document.getElementById("gameControls");
+        const multiplayerPanel = document.getElementById("multiplayerPanel");
+        const boardWrapper = document.querySelector(".board-wrapper");
         // statusMessage is now inside gameControls, so we don't need to toggle it separately
 
-        if (mode === 'local') {
-          localBtn.classList.add('active');
-          multiplayerBtn.classList.remove('active');
-          gameControls.style.display = 'grid';
-          multiplayerPanel.style.display = 'none';
-          boardWrapper.style.display = 'flex';
+        if (mode === "local") {
+          localBtn.classList.add("active");
+          multiplayerBtn.classList.remove("active");
+          gameControls.style.display = "grid";
+          multiplayerPanel.style.display = "none";
+          boardWrapper.style.display = "flex";
 
           // Reset to local mode
           if (window.multiplayerClient) {
             window.multiplayerClient.isMultiplayer = false;
           }
-          
+
           // Reset turn label to default
-          const turnLabel = document.getElementById('turnLabel');
+          const turnLabel = document.getElementById("turnLabel");
           if (turnLabel) {
-            turnLabel.textContent = 'Current Turn:';
+            turnLabel.textContent = "Current Turn:";
           }
         } else {
-          localBtn.classList.remove('active');
-          multiplayerBtn.classList.add('active');
-          gameControls.style.display = 'none';
-          multiplayerPanel.style.display = 'block';
-          boardWrapper.style.display = 'none';
+          localBtn.classList.remove("active");
+          multiplayerBtn.classList.add("active");
+          gameControls.style.display = "none";
+          multiplayerPanel.style.display = "block";
+          boardWrapper.style.display = "none";
 
           // Initialize multiplayer if not already
           if (!window.multiplayerClient) {
             if (!window.game) {
-                console.log('⏳ Waiting for game to initialize...');
-                // Poll for game to be ready
-                const checkGame = setInterval(() => {
-                    if (window.game) {
-                        clearInterval(checkGame);
-                        console.log('✅ Game ready, initializing multiplayer...');
-                        window.multiplayerClient = new MultiplayerClient(window.game);
-                        window.multiplayerClient.connect();
-                    }
-                }, 100); // Check every 100ms
-                return;
+              console.log("⏳ Waiting for game to initialize...");
+              // Poll for game to be ready
+              const checkGame = setInterval(() => {
+                if (window.game) {
+                  clearInterval(checkGame);
+                  console.log("✅ Game ready, initializing multiplayer...");
+                  window.multiplayerClient = new MultiplayerClient(window.game);
+                  window.multiplayerClient.connect();
+                }
+              }, 100); // Check every 100ms
+              return;
             }
             window.multiplayerClient = new MultiplayerClient(window.game);
             window.multiplayerClient.connect();
@@ -326,59 +469,61 @@
 
       // Submit username
       function submitUsername() {
-        const input = document.getElementById('usernameInput');
-        const error = document.getElementById('usernameError');
+        const input = document.getElementById("usernameInput");
+        const error = document.getElementById("usernameError");
         const username = input.value.trim();
 
         if (!username) {
-          error.textContent = 'Please enter a username';
-          error.style.display = 'block';
+          error.textContent = "Please enter a username";
+          error.style.display = "block";
           return;
         }
 
         if (username.length < 3 || username.length > 20) {
-          error.textContent = 'Username must be 3-20 characters';
-          error.style.display = 'block';
+          error.textContent = "Username must be 3-20 characters";
+          error.style.display = "block";
           return;
         }
 
         if (!/^[a-zA-Z0-9_-]+$/.test(username)) {
-          error.textContent = 'Only letters, numbers, underscores, and hyphens allowed';
-          error.style.display = 'block';
+          error.textContent =
+            "Only letters, numbers, underscores, and hyphens allowed";
+          error.style.display = "block";
           return;
         }
 
-        error.style.display = 'none';
-        
+        error.style.display = "none";
+
         if (window.multiplayerClient) {
-            window.multiplayerClient.registerPlayer(username);
+          window.multiplayerClient.registerPlayer(username);
         } else {
-            console.error("Multiplayer client not initialized");
-            error.textContent = "Error: Multiplayer not initialized. Refresh page.";
-            error.style.display = 'block';
+          console.error("Multiplayer client not initialized");
+          error.textContent =
+            "Error: Multiplayer not initialized. Refresh page.";
+          error.style.display = "block";
         }
       }
 
       // Change username
       function changeUsername() {
         // Clear saved username from localStorage
-        localStorage.removeItem('connect5_username');
-        
+        localStorage.removeItem("connect5_username");
+
         // Show username modal
-        const modal = document.getElementById('usernameModal');
+        const modal = document.getElementById("usernameModal");
         if (modal) {
-          modal.classList.add('active');
+          modal.classList.add("active");
           // Clear the input field
-          document.getElementById('usernameInput').value = '';
+          document.getElementById("usernameInput").value = "";
         }
       }
 
       // Allow Enter key to submit username
-      document.addEventListener('DOMContentLoaded', () => {
-        const input = document.getElementById('usernameInput');
+      document.addEventListener("DOMContentLoaded", () => {
+        const input = document.getElementById("usernameInput");
         if (input) {
-          input.addEventListener('keypress', (e) => {
-            if (e.key === 'Enter') {
+          input.addEventListener("keypress", (e) => {
+            if (e.key === "Enter") {
               submitUsername();
             }
           });
diff --git a/multiplayer-styles.css b/multiplayer-styles.css
index f0c9357..9882538 100644
--- a/multiplayer-styles.css
+++ b/multiplayer-styles.css
@@ -453,3 +453,200 @@
     padding: 2rem 1.5rem;
   }
 }
+
+/* Surrender Button */
+.surrender-btn {
+  padding: 0.75rem 1.5rem;
+  background: linear-gradient(135deg, #dc2626 0%, #991b1b 100%);
+  border: none;
+  border-radius: 10px;
+  color: white;
+  font-weight: 600;
+  font-size: 0.95rem;
+  cursor: pointer;
+  transition: all 0.3s ease;
+  font-family: "Inter", sans-serif;
+  display: flex;
+  align-items: center;
+  gap: 0.5rem;
+  box-shadow: 0 4px 12px rgba(220, 38, 38, 0.3);
+}
+
+.surrender-btn:hover {
+  transform: translateY(-2px);
+  box-shadow: 0 6px 20px rgba(220, 38, 38, 0.5);
+}
+
+/* Game Over Modal */
+.game-over-modal {
+  max-width: 450px;
+  text-align: center;
+}
+
+.game-over-icon {
+  font-size: 4rem;
+  margin-bottom: 1rem;
+  animation: bounce 1s ease-in-out;
+}
+
+@keyframes bounce {
+  0%, 100% { transform: translateY(0); }
+  50% { transform: translateY(-20px); }
+}
+
+.game-over-modal h2 {
+  font-size: 2rem;
+  margin-bottom: 0.5rem;
+  background: var(--accent-gradient);
+  -webkit-background-clip: text;
+  -webkit-text-fill-color: transparent;
+  background-clip: text;
+}
+
+.game-over-subtitle {
+  color: var(--text-secondary);
+  font-size: 1.1rem;
+  margin-bottom: 1.5rem;
+}
+
+.game-over-stats {
+  display: grid;
+  grid-template-columns: repeat(3, 1fr);
+  gap: 1rem;
+  padding: 1.5rem;
+  background: var(--bg-tertiary);
+  border-radius: 12px;
+  margin-bottom: 1.5rem;
+  border: 1px solid var(--border-light);
+}
+
+.game-over-stats .stat-item {
+  display: flex;
+  flex-direction: column;
+  gap: 0.5rem;
+  align-items: center;
+}
+
+.game-over-stats .stat-label {
+  color: var(--text-secondary);
+  font-size: 0.85rem;
+  font-weight: 600;
+  text-transform: uppercase;
+}
+
+.game-over-stats .stat-value {
+  color: var(--accent-primary);
+  font-size: 1.5rem;
+  font-weight: 700;
+}
+
+.game-over-actions {
+  display: flex;
+  flex-direction: column;
+  gap: 0.75rem;
+}
+
+.rematch-btn,
+.lobby-btn {
+  padding: 1rem 2rem;
+  border: none;
+  border-radius: 12px;
+  font-weight: 600;
+  font-size: 1rem;
+  cursor: pointer;
+  transition: all 0.3s ease;
+  font-family: "Inter", sans-serif;
+  display: flex;
+  align-items: center;
+  justify-content: center;
+  gap: 0.5rem;
+}
+
+.rematch-btn {
+  background: var(--accent-gradient);
+  color: var(--text-primary);
+  box-shadow: 0 4px 16px rgba(147, 51, 234, 0.3);
+}
+
+.rematch-btn:hover {
+  transform: translateY(-2px);
+  box-shadow: 0 6px 24px rgba(147, 51, 234, 0.5);
+}
+
+.lobby-btn {
+  background: var(--bg-tertiary);
+  color: var(--text-primary);
+  border: 2px solid var(--border-light);
+}
+
+.lobby-btn:hover {
+  border-color: var(--accent-primary);
+  transform: translateY(-2px);
+  box-shadow: 0 4px 12px rgba(147, 51, 234, 0.2);
+}
+
+/* Surrender Confirmation Modal */
+.surrender-modal {
+  max-width: 400px;
+  text-align: center;
+}
+
+.surrender-icon {
+  font-size: 4rem;
+  margin-bottom: 1rem;
+  animation: shake 0.5s ease-in-out;
+}
+
+@keyframes shake {
+  0%, 100% { transform: translateX(0); }
+  25% { transform: translateX(-10px); }
+  75% { transform: translateX(10px); }
+}
+
+.surrender-modal h2 {
+  font-size: 1.75rem;
+  margin-bottom: 0.75rem;
+  color: var(--danger);
+}
+
+.surrender-actions {
+  display: flex;
+  gap: 0.75rem;
+  margin-top: 1.5rem;
+}
+
+.confirm-surrender-btn,
+.cancel-surrender-btn {
+  flex: 1;
+  padding: 0.875rem 1.5rem;
+  border: none;
+  border-radius: 10px;
+  font-weight: 600;
+  font-size: 1rem;
+  cursor: pointer;
+  transition: all 0.3s ease;
+  font-family: "Inter", sans-serif;
+}
+
+.confirm-surrender-btn {
+  background: linear-gradient(135deg, #dc2626 0%, #991b1b 100%);
+  color: white;
+  box-shadow: 0 4px 12px rgba(220, 38, 38, 0.3);
+}
+
+.confirm-surrender-btn:hover {
+  transform: translateY(-2px);
+  box-shadow: 0 6px 20px rgba(220, 38, 38, 0.5);
+}
+
+.cancel-surrender-btn {
+  background: var(--bg-tertiary);
+  color: var(--text-primary);
+  border: 2px solid var(--border-light);
+}
+
+.cancel-surrender-btn:hover {
+  border-color: var(--accent-primary);
+  transform: translateY(-2px);
+  box-shadow: 0 4px 12px rgba(147, 51, 234, 0.2);
+}
diff --git a/multiplayer.js b/multiplayer.js
index 5132229..3dcba42 100644
--- a/multiplayer.js
+++ b/multiplayer.js
@@ -10,6 +10,9 @@ class MultiplayerClient {
         this.activePlayers = [];
         this.pendingChallenges = new Map();
         this.selectedBoardSize = 15; // Default board size for multiplayer
+        this.opponent = null; // Track opponent for rematch
+        this.opponentId = null;
+        this.lastGameResult = null;
     }
     
     
diff --git a/surrender-rematch.js b/surrender-rematch.js
new file mode 100644
index 0000000..822997f
--- /dev/null
+++ b/surrender-rematch.js
@@ -0,0 +1,68 @@
+// Global helper functions for surrender and rematch features
+
+// Show surrender confirmation
+function confirmSurrender() {
+    if (!window.multiplayerClient || !window.multiplayerClient.isMultiplayer) {
+        return;
+    }
+    
+    const modal = document.getElementById('surrenderModal');
+    if (modal) {
+        modal.classList.add('active');
+    }
+}
+
+// Cancel surrender
+function cancelSurrender() {
+    const modal = document.getElementById('surrenderModal');
+    if (modal) {
+        modal.classList.remove('active');
+    }
+}
+
+// Execute surrender
+function executeSurrender() {
+    const modal = document.getElementById('surrenderModal');
+    if (modal) {
+        modal.classList.remove('active');
+    }
+    
+    if (window.multiplayerClient) {
+        window.multiplayerClient.socket.emit('surrender', { 
+            gameId: window.multiplayerClient.currentGameId 
+        });
+    }
+}
+
+// Request rematch
+function requestRematch() {
+    if (!window.multiplayerClient || !window.multiplayerClient.opponent) {
+        return;
+    }
+    
+    window.multiplayerClient.socket.emit('send_rematch', {
+        opponentId: window.multiplayerClient.opponentId,
+        boardSize: window.multiplayerClient.selectedBoardSize ||  15
+    });
+    
+    if (window.multiplayerClient.showMessage) {
+        window.multiplayerClient.showMessage(`Rematch request sent to ${window.multiplayerClient.opponent}`, 'info');
+    }
+    
+    const modal = document.getElementById('gameOverModal');
+    if (modal) {
+        modal.classList.remove('active');
+    }
+}
+
+// Return to lobby from game over modal
+function returnToLobby() {
+    if (window.multiplayerClient) {
+        window.multiplayerClient.returnToLobby();
+    }
+    
+    const modal = document.getElementById('gameOverModal');
+    if (modal) {
+        modal.classList.remove('active');
+    }
+}
diff --git a/temp-multiplayer-methods.txt b/temp-multiplayer-methods.txt
new file mode 100644
index 0000000..ae444f4
--- /dev/null
+++ b/temp-multiplayer-methods.txt
@@ -0,0 +1,71 @@
+
+    // Surrender game
+    surrenderGame() {
+        if (!this.isMultiplayer || !this.currentGameId) {
+            this.showMessage('No active game to surrender', 'error');
+            return;
+        }
+        
+        this.socket.emit('surrender', { gameId: this.currentGameId });
+    }
+    
+    // Handle rematch request from opponent
+    handleRematchRequest(data) {
+        const notification = document.createElement('div');
+        notification.className = 'challenge-notification';
+        notification.innerHTML = `
+            <div class="challenge-content">
+                <h3>Rematch Request!</h3>
+                <p><strong>${data.from}</strong> wants a rematch</p>
+                <p>Board size: ${data.boardSize}×${data.boardSize}</p>
+                <div class="challenge-actions">
+                    <button class="accept-btn" onclick="multiplayerClient.acceptRematch('${data.rematchId}')">
+                        Accept
+                    </button>
+                    <button class="decline-btn" onclick="multiplayerClient.declineRematch('${data.rematchId}')">
+                        Decline
+                    </button>
+               </div>
+            </div>
+        `;
+        
+        document.body.appendChild(notification);
+        setTimeout(() => notification.classList.add('active'), 10);
+    }
+    
+    // Send rematch request
+    sendRematchRequest() {
+        if (!this.opponentId) {
+            this.showMessage('No opponent to challenge', 'error');
+            return;
+        }
+        
+        this.socket.emit('send_rematch', {
+            opponentId: this.opponentId,
+            boardSize: this.selectedBoardSize
+        });
+        
+        this.showMessage(`Rematch request sent to ${this.opponent}`, 'info');
+        document.getElementById('gameOverModal').classList.remove('active');
+    }
+    
+    // Accept rematch
+    acceptRematch(rematchId) {
+        this.socket.emit('accept_rematch', { rematchId });
+        
+        // Hide game over modal
+        document.getElementById('gameOverModal').classList.remove('active');
+        
+        // Remove notification
+        const notifications = document.querySelectorAll('.challenge-notification');
+        notifications.forEach(n => n.remove());
+    }
+    
+    // Decline rematch
+    declineRematch(rematchId) {
+        this.socket.emit('decline_rematch', { rematchId });
+        
+        // Remove notification
+        const notifications = document.querySelectorAll('.challenge-notification');
+        notifications.forEach(n => n.remove());
+    }