diff --git a/Sudoku.php b/Sudoku.php
index ff576cf..034b634 100644
--- a/Sudoku.php
+++ b/Sudoku.php
@@ -156,7 +156,7 @@ if (!isset($_SESSION['username'])) {
         #timer-label {
             font-size: 20px;
             font-weight: bold;
-            color: #333;
+            color: darkslategray;
             font-family: monospace;
             margin-top: 2px;
         }
@@ -314,7 +314,7 @@ if (!isset($_SESSION['username'])) {
         .modal-title {
             font-size: 24px;
             font-weight: bold;
-            color: #333;
+            color: darkslategray;
             margin-bottom: 10px;
         }
 
@@ -329,7 +329,7 @@ if (!isset($_SESSION['username'])) {
             display: flex;
             justify-content: space-around;
             margin-bottom: 25px;
-            background-color: #f0f8ff;
+            background-color: aliceblue;
             padding: 10px;
             border-radius: 10px;
         }
@@ -361,8 +361,8 @@ if (!isset($_SESSION['username'])) {
             border: 2px solid var(--primary-color);
         }
         .btn-grey-modal {
-            background-color: #e0e0e0;
-            color: #555;
+            background-color: gainsboro;
+            color: dimgray;
         }
 
         @keyframes popIn {
@@ -370,6 +370,55 @@ if (!isset($_SESSION['username'])) {
             to { transform: scale(1); opacity: 1; }
         }
 
+        /* ... existing styles ... */
+        .game-layout {
+            display: flex;
+            gap: 40px;
+            align-items: flex-start;
+        }
+
+        .game-main {
+            display: flex;
+            flex-direction: column;
+            align-items: center;
+        }
+
+        .game-sidebar {
+            width: 250px;
+            background: rgba(255, 255, 255, 0.9);
+            border-radius: 12px;
+            padding: 15px;
+            box-shadow: 0 4px 15px rgba(0,0,0,0.2);
+            display: flex;
+            flex-direction: column;
+        }
+
+        .mini-leaderboard-title {
+            text-align: center;
+            font-weight: bold;
+            margin-bottom: 10px;
+            color: darkslategray;
+            border-bottom: 2px solid lightgray;
+            padding-bottom: 5px;
+        }
+
+        .mini-table {
+            width: 100%;
+            border-collapse: collapse;
+            font-size: 12px;
+        }
+        .mini-table th, .mini-table td {
+            padding: 5px;
+            text-align: left;
+            border-bottom: 1px solid whitesmoke;
+        }
+        .mini-table th { color: gray; font-weight: bold; }
+        .mini-table tr:last-child td { border-bottom: none; }
+        
+        .rank-1 { color: gold; font-weight: bold; }
+        .rank-2 { color: silver; font-weight: bold; }
+        .rank-3 { color: chocolate; font-weight: bold; }
+
     </style>
 </head>
 
@@ -395,38 +444,61 @@ if (!isset($_SESSION['username'])) {
     </div>
 
     <div id="screen-game" class="screen">
-        <div class="game-header">
-            <button class="btn-back-icon" onclick="backToMenu()">&#8592;</button>
-            
-            <div class="header-center">
-                <div id="difficulty-label">MEDIUM</div>
-                <div id="timer-label">00:00</div>
+        <div class="game-layout">
+            <!-- Main Game Area -->
+            <div class="game-main">
+                <div class="game-header">
+                    <button class="btn-back-icon" onclick="backToMenu()">&#8592;</button>
+                    
+                    <div class="header-center">
+                        <div id="difficulty-label">MEDIUM</div>
+                        <div id="timer-label">00:00</div>
+                    </div>
+
+                    <div id="mistake-label">Salah: 0/3</div>
+                </div>
+
+                <div id="game-msg"></div>
+
+                <div id="board-container">
+                    <div id="board"></div>
+                </div>
+
+                <div id="numpad-row">
+                    <div class="number" data-num="1"><span class="main-num">1</span><span class="count-num">9</span></div>
+                    <div class="number" data-num="2"><span class="main-num">2</span><span class="count-num">9</span></div>
+                    <div class="number" data-num="3"><span class="main-num">3</span><span class="count-num">9</span></div>
+                    <div class="number" data-num="4"><span class="main-num">4</span><span class="count-num">9</span></div>
+                    <div class="number" data-num="5"><span class="main-num">5</span><span class="count-num">9</span></div>
+                    <div class="number" data-num="6"><span class="main-num">6</span><span class="count-num">9</span></div>
+                    <div class="number" data-num="7"><span class="main-num">7</span><span class="count-num">9</span></div>
+                    <div class="number" data-num="8"><span class="main-num">8</span><span class="count-num">9</span></div>
+                    <div class="number" data-num="9"><span class="main-num">9</span><span class="count-num">9</span></div>
+                </div>
+
+                <div id="tools-row">
+                    <div class="tool-btn btn-delete" onclick="deleteNumber()"><span>🗑</span> HAPUS</div>
+                    <div id="btn-hint" class="tool-btn btn-hint" onclick="getHint()"><span>💡</span> BANTUAN (3)</div>
+                </div>
             </div>
 
-            <div id="mistake-label">Salah: 0/3</div>
-        </div>
-
-        <div id="game-msg"></div>
-
-        <div id="board-container">
-            <div id="board"></div>
-        </div>
-
-        <div id="numpad-row">
-            <div class="number" data-num="1"><span class="main-num">1</span><span class="count-num">9</span></div>
-            <div class="number" data-num="2"><span class="main-num">2</span><span class="count-num">9</span></div>
-            <div class="number" data-num="3"><span class="main-num">3</span><span class="count-num">9</span></div>
-            <div class="number" data-num="4"><span class="main-num">4</span><span class="count-num">9</span></div>
-            <div class="number" data-num="5"><span class="main-num">5</span><span class="count-num">9</span></div>
-            <div class="number" data-num="6"><span class="main-num">6</span><span class="count-num">9</span></div>
-            <div class="number" data-num="7"><span class="main-num">7</span><span class="count-num">9</span></div>
-            <div class="number" data-num="8"><span class="main-num">8</span><span class="count-num">9</span></div>
-            <div class="number" data-num="9"><span class="main-num">9</span><span class="count-num">9</span></div>
-        </div>
-
-        <div id="tools-row">
-            <div class="tool-btn btn-delete" onclick="deleteNumber()"><span>🗑</span> HAPUS</div>
-            <div id="btn-hint" class="tool-btn btn-hint" onclick="getHint()"><span>💡</span> BANTUAN (3)</div>
+            <!-- Right Sidebar: Leaderboard -->
+            <div class="game-sidebar">
+                <div class="mini-leaderboard-title">🏆 Top <span id="lb-diff-name">Easy</span></div>
+                <table class="mini-table">
+                    <thead>
+                        <tr>
+                            <th width="10%">#</th>
+                            <th>Player</th>
+                            <th>Time</th>
+                        </tr>
+                    </thead>
+                    <tbody id="mini-lb-body">
+                        <!-- Loaded via JS -->
+                        <tr><td colspan="3" align="center">Loading...</td></tr>
+                    </tbody>
+                </table>
+            </div>
         </div>
         
         <div id="modal-game-over" class="modal-overlay">
@@ -501,8 +573,52 @@ if (!isset($_SESSION['username'])) {
             else if (difficulty === 'hard') { holes = 50; label = "SULIT"; }
             
             document.getElementById('difficulty-label').innerText = label;
+            document.getElementById('lb-diff-name').innerText = label; // Update sidebar title
+            
             switchScreen('screen-game');
             newGame(holes);
+            loadLeaderboard(difficulty); // Fetch leaderboard
+        }
+
+        // --- Leaderboard Fetch Logic ---
+        function loadLeaderboard(diff) {
+            let tbody = document.getElementById('mini-lb-body');
+            tbody.innerHTML = '<tr><td colspan="3" align="center">Loading...</td></tr>';
+
+            fetch(`leaderboard.php?api=true&difficulty=${diff}`)
+                .then(res => res.json())
+                .then(data => {
+                    tbody.innerHTML = '';
+                    if (data.length === 0) {
+                        tbody.innerHTML = '<tr><td colspan="3" align="center">Belum ada data</td></tr>';
+                        return;
+                    }
+                    
+                    data.forEach((row, index) => {
+                        let rank = index + 1;
+                        let m = Math.floor(row.time_seconds / 60);
+                        let s = row.time_seconds % 60;
+                        let timeStr = (m < 10 ? "0"+m : m) + ":" + (s < 10 ? "0"+s : s);
+                        
+                        let rankClass = '';
+                        if (rank === 1) rankClass = 'rank-1';
+                        else if (rank === 2) rankClass = 'rank-2';
+                        else if (rank === 3) rankClass = 'rank-3';
+
+                        let tr = `
+                            <tr>
+                                <td class="${rankClass}">#${rank}</td>
+                                <td>${row.username}</td>
+                                <td>${timeStr}</td>
+                            </tr>
+                        `;
+                        tbody.innerHTML += tr;
+                    });
+                })
+                .catch(err => {
+                    console.error(err);
+                    tbody.innerHTML = '<tr><td colspan="3" align="center" style="color:red">Error</td></tr>';
+                });
         }
 
         function newGame(holesCount) {
@@ -736,6 +852,8 @@ if (!isset($_SESSION['username'])) {
             
             document.getElementById("tools-row").style.display = "none";
             document.getElementById("numpad-row").style.display = "none";
+            
+            loadLeaderboard(currentDifficulty); 
             return true;
         }
 
@@ -799,7 +917,7 @@ function saveScore() {
         headers: {
             "Content-Type": "application/x-www-form-urlencoded"
         },
-        body: 'difficulty=${currentDifficulty}&time=${secondsElapsed}'
+        body: `difficulty=${currentDifficulty}&time=${secondsElapsed}`
     })
     .then(res => res.text())
     .then(data => console.log("SAVE SCORE:", data))
diff --git a/leaderboard.php b/leaderboard.php
index 7c7e67b..600401a 100644
--- a/leaderboard.php
+++ b/leaderboard.php
@@ -1,7 +1,7 @@
 <?php
 require_once 'db.php';
 
-// Auto-create table if it doesn't exist
+
 try {
     $checkTable = $conn->query("SHOW TABLES LIKE 'leaderboard_sudoku'");
     if ($checkTable->rowCount() == 0) {
@@ -16,11 +16,14 @@ try {
         $conn->exec($createSql);
     }
 } catch (PDOException $e) {
-    // Fail silently or log, but attempting to continue might show empty leaderboard instead of crash
 }
 
-// Helper function to get top 10 by difficulty
 function getLeaderboard($conn, $difficulty) {
+    $allowed = ['easy', 'medium', 'hard'];
+    if (!in_array($difficulty, $allowed)) {
+        return [];
+    }
+
     $sql = "
         SELECT username, time_seconds, created_at
         FROM leaderboard_sudoku
@@ -33,7 +36,13 @@ function getLeaderboard($conn, $difficulty) {
     return $stmt->fetchAll(PDO::FETCH_ASSOC);
 }
 
-// Fetch data for each level
+if (isset($_GET['api']) && isset($_GET['difficulty'])) {
+    header('Content-Type: application/json');
+    $data = getLeaderboard($conn, $_GET['difficulty']);
+    echo json_encode($data);
+    exit;
+}
+
 $easyData = getLeaderboard($conn, 'easy');
 $mediumData = getLeaderboard($conn, 'medium');
 $hardData = getLeaderboard($conn, 'hard');
@@ -48,7 +57,8 @@ $hardData = getLeaderboard($conn, 'hard');
     <style>
         body {
             font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
-            background-color: #121212;
+            background: url("Background.jpg") no-repeat center center fixed;
+            background-size: cover;
             color: white;
             display: flex;
             flex-direction: column;
@@ -63,13 +73,13 @@ $hardData = getLeaderboard($conn, 'hard');
         .leaderboard-container {
             width: 100%;
             max-width: 500px;
-            background: #1e1e1e;
+            background: white;
+            color: darkslategray;
             border-radius: 12px;
             overflow: hidden;
-            box-shadow: 0 4px 15px rgba(0,0,0,0.5);
+            box-shadow: 0 4px 15px rgba(0,0,0,0.2);
         }
 
-        /* Tabs Navigation */
         .tabs {
             display: flex;
             width: 100%;
@@ -82,37 +92,35 @@ $hardData = getLeaderboard($conn, 'hard');
             cursor: pointer;
             font-size: 16px;
             font-weight: bold;
-            color: #ccc;
-            background-color: #2c2c2c;
+            color: dimgray;
+            background-color: whitesmoke;
             transition: 0.3s;
-            border-bottom: 4px solid transparent;
+            border-bottom: 4px solid lightgray;
         }
 
         .tab-btn:hover {
-            background-color: #333;
-            color: white;
+            background-color: gainsboro;
+            color: black;
         }
 
-        /* Active Tab Styling - Colors requested: Easy=Green, Medium=Yellow, Hard=Blue */
         .tab-btn.active.easy {
-            background-color: #1e1e1e;
-            color: #4CAF50; /* Green */
-            border-bottom-color: #4CAF50;
+            background-color: white;
+            color: limegreen;
+            border-bottom-color: limegreen;
         }
         .tab-btn.active.medium {
-            background-color: #1e1e1e;
-            color: #2196F3; /* Blue */
-            border-bottom-color: #2196F3;
+            background-color: white;
+            color: dodgerblue;
+            border-bottom-color: dodgerblue;
         }
         .tab-btn.active.hard {
-            background-color: #1e1e1e;
-            color: #f44336; /* Red */
-            border-bottom-color: #f44336;
+            background-color: white;
+            color: red;
+            border-bottom-color: red;
         }
 
-        /* Content Sections */
         .tab-content {
-            display: none; /* Hidden by default */
+            display: none;
             padding: 20px;
             animation: fadeIn 0.4s;
         }
@@ -130,11 +138,11 @@ $hardData = getLeaderboard($conn, 'hard');
         th, td {
             text-align: left;
             padding: 12px;
-            border-bottom: 1px solid #333;
+            border-bottom: 1px solid whitesmoke;
         }
 
         th {
-            color: #888;
+            color: gray;
             font-size: 14px;
             text-transform: uppercase;
         }
@@ -143,25 +151,27 @@ $hardData = getLeaderboard($conn, 'hard');
             border-bottom: none;
         }
 
-        /* Rank Colors */
         .rank-1 { color: gold; font-weight: bold; }
         .rank-2 { color: silver; font-weight: bold; }
-        .rank-3 { color: #cd7f32; font-weight: bold; } /* Bronze */
+        .rank-3 { color: chocolate; font-weight: bold; }
 
         .back-btn {
             margin-top: 20px;
             padding: 10px 20px;
-            background-color: #333;
-            color: white;
+            background-color: white;
+            color: darkslategray;
             border: none;
             border-radius: 20px;
             cursor: pointer;
             text-decoration: none;
             font-weight: bold;
             transition: 0.2s;
+            box-shadow: 0 4px 6px rgba(0,0,0,0.1);
         }
         .back-btn:hover {
-            background-color: #444;
+            background-color: whitesmoke;
+            transform: translateY(-2px);
+            box-shadow: 0 6px 8px rgba(0,0,0,0.15);
         }
 
         @keyframes fadeIn {
@@ -175,28 +185,23 @@ $hardData = getLeaderboard($conn, 'hard');
     <h2>🏆 Leaderboard</h2>
 
     <div class="leaderboard-container">
-        <!-- Tabs -->
         <div class="tabs">
             <button class="tab-btn easy active" onclick="openTab('easy')">MUDAH</button>
             <button class="tab-btn medium" onclick="openTab('medium')">SEDANG</button>
             <button class="tab-btn hard" onclick="openTab('hard')">SULIT</button>
         </div>
 
-        <!-- Easy Section -->
         <div id="easy" class="tab-content active">
-            <h3 style="color: #4CAF50; margin-top: 0;">Level Mudah</h3>
+            <h3 style="color: limegreen; margin-top: 0;">Level Mudah</h3>
             <?php renderTable($easyData); ?>
         </div>
-
-        <!-- Medium Section -->
         <div id="medium" class="tab-content">
-            <h3 style="color: #2196F3; margin-top: 0;">Level Sedang</h3>
+            <h3 style="color: dodgerblue; margin-top: 0;">Level Sedang</h3>
             <?php renderTable($mediumData); ?>
         </div>
 
-        <!-- Hard Section -->
         <div id="hard" class="tab-content">
-            <h3 style="color: #f44336; margin-top: 0;">Level Sulit</h3>
+            <h3 style="color: red; margin-top: 0;">Level Sulit</h3>
             <?php renderTable($hardData); ?>
         </div>
     </div>
@@ -205,19 +210,13 @@ $hardData = getLeaderboard($conn, 'hard');
 
     <script>
         function openTab(difficulty) {
-            // Hide all tab contents
             const contents = document.querySelectorAll('.tab-content');
             contents.forEach(content => content.classList.remove('active'));
 
-            // Deactivate all buttons
             const buttons = document.querySelectorAll('.tab-btn');
             buttons.forEach(btn => btn.classList.remove('active'));
 
-            // Activate specific tab and button
             document.getElementById(difficulty).classList.add('active');
-            
-            // Find the button that calls this function (or match by class) needs logic if I don't pass 'this'
-            // Using querySelector to find the button with specific class for simplicity in this context
             document.querySelector(`.tab-btn.${difficulty}`).classList.add('active');
         }
     </script>
@@ -226,7 +225,6 @@ $hardData = getLeaderboard($conn, 'hard');
 </html>
 
 <?php
-// Helper to render table
 function renderTable($data) {
     if (count($data) === 0) {
         echo "<p style='color: gray; text-align: center; padding: 20px;'>Belum ada data.</p>";
diff --git a/login.php b/login.php
index bff78ae..dbd63e9 100644
--- a/login.php
+++ b/login.php
@@ -54,14 +54,14 @@ if (isset($_POST['login'])) {
 <title>Login</title>
 <style>
 /* Style disamakan persis dengan register.php Anda */
-body { font-family: Arial; background:#eef2f7; display:flex; height:100vh; justify-content:center; align-items:center; margin:0; }
+body { font-family: Arial; background:aliceblue; display:flex; height:100vh; justify-content:center; align-items:center; margin:0; }
 .card { width:350px; background:white; padding:20px; border-radius:10px; box-shadow:0 6px 20px rgba(0,0,0,0.1); }
-.input { width:100%; padding:10px; margin:8px 0; border:1px solid #ccc; border-radius:8px; box-sizing: border-box; }
-.btn { width:100%; padding:12px; background:#007bff; color:white; border:none; border-radius:8px; cursor:pointer; }
-.btn:hover { background:#0056b3; }
-.err { color:#d00000; margin-bottom:10px; text-align:center; background: #ffe6e6; padding: 5px; border-radius: 5px;}
+.input { width:100%; padding:10px; margin:8px 0; border:1px solid lightgray; border-radius:8px; box-sizing: border-box; }
+.btn { width:100%; padding:12px; background:dodgerblue; color:white; border:none; border-radius:8px; cursor:pointer; }
+.btn:hover { background:mediumblue; }
+.err { color:firebrick; margin-bottom:10px; text-align:center; background: mistyrose; padding: 5px; border-radius: 5px;}
 .link { text-align:center; margin-top:10px; }
-a { text-decoration: none; color: #007bff; }
+a { text-decoration: none; color: dodgerblue; }
 </style>
 </head>
 <body>
diff --git a/register.php b/register.php
index e4487db..5e142b9 100644
--- a/register.php
+++ b/register.php
@@ -51,16 +51,16 @@ if (isset($_POST['register'])) {
 <head>
 <title>Daftar Akun Baru</title>
 <style>
-body { font-family: Arial; background:#eef2f7; display:flex; height:100vh; justify-content:center; align-items:center; margin:0; }
+body { font-family: Arial; background:aliceblue; display:flex; height:100vh; justify-content:center; align-items:center; margin:0; }
 .card { width:350px; background:white; padding:20px; border-radius:10px; box-shadow:0 6px 20px rgba(0,0,0,0.1); }
-.input { width:100%; padding:10px; margin:8px 0; border:1px solid #ccc; border-radius:8px; box-sizing: border-box; }
-.btn { width:100%; padding:12px; background:#28a745; color:white; border:none; border-radius:8px; cursor:pointer; font-weight: bold;}
-.btn:hover { background:#218838; }
-.err { color:#721c24; margin-bottom:10px; text-align:center; background: #f8d7da; padding: 10px; border-radius: 5px; border: 1px solid #f5c6cb; font-size: 14px;}
-.success { color:#155724; margin-bottom:10px; text-align:center; background: #d4edda; padding: 10px; border-radius: 5px; border: 1px solid #c3e6cb;}
-.link { text-align:center; margin-top:10px; font-size: 14px; color: #666; }
-a { text-decoration: none; color: #007bff; }
-h2 { text-align: center; margin-top: 0; color: #333; }
+.input { width:100%; padding:10px; margin:8px 0; border:1px solid lightgray; border-radius:8px; box-sizing: border-box; }
+.btn { width:100%; padding:12px; background:forestgreen; color:white; border:none; border-radius:8px; cursor:pointer; font-weight: bold;}
+.btn:hover { background:darkgreen; }
+.err { color:darkred; margin-bottom:10px; text-align:center; background: mistyrose; padding: 10px; border-radius: 5px; border: 1px solid pink; font-size: 14px;}
+.success { color:darkgreen; margin-bottom:10px; text-align:center; background: honeydew; padding: 10px; border-radius: 5px; border: 1px solid lightgreen;}
+.link { text-align:center; margin-top:10px; font-size: 14px; color: gray; }
+a { text-decoration: none; color: dodgerblue; }
+h2 { text-align: center; margin-top: 0; color: darkslategray; }
 p { text-align:center; color:gray; font-size: 14px; margin-bottom: 20px; }
 </style>
 </head>