diff --git a/Config.php b/Config.php
index 867a243..87aba80 100644
--- a/Config.php
+++ b/Config.php
@@ -1,12 +1,12 @@
 <?php
 $host = "localhost";
-$user = "root";        
-$password = "";            
-$database   = "users_db"; 
+$user = "root";
+$password = "";
+$database = "users_db";
 
 $conn = mysqli_connect($host, $user, $password, $database);
 
-if ($conn->connect_error) {
+if (!$conn) {
     die("Koneksi gagal: " . mysqli_connect_error());
 }
 ?>
diff --git a/auth.php b/auth.php
index 40f6f6d..467505c 100644
--- a/auth.php
+++ b/auth.php
@@ -10,32 +10,31 @@ if (isset($_POST['btn-register'])) {
     $username = $_POST['username'];
     $email    = $_POST['email'];
     $password = $_POST['password'];
-    // Pastikan di HTML name-nya sudah 'confirm_password'
     $confirm  = $_POST['confirm_password']; 
 
     // --- 1. VALIDASI DATA ---
 
     // Cek Kosong
     if (empty($username) || empty($email) || empty($password) || empty($confirm)) {
-        echo "<script>alert('Semua data wajib diisi!'); window.location='index.html';</script>";
+        echo "<script>alert('Semua data wajib diisi!'); window.location='index.php';</script>";
         exit;
     }
 
     // Cek Format Email (Biar gak ngawur)
     if (!filter_var($email, FILTER_VALIDATE_EMAIL)) {
-        echo "<script>alert('Format email tidak valid! (contoh: nama@email.com)'); window.location='index.html';</script>";
+        echo "<script>alert('Format email tidak valid! (contoh: nama@email.com)'); window.location='index.php';</script>";
         exit;
     }
 
     // Cek Panjang Password (Minimal 6)
     if (strlen($password) < 6) {
-        echo "<script>alert('Password terlalu pendek! Minimal 6 karakter.'); window.location='index.html';</script>";
+        echo "<script>alert('Password terlalu pendek! Minimal 6 karakter.'); window.location='index.php';</script>";
         exit;
     }
 
     // Cek Kesamaan Password
     if ($password !== $confirm) {
-        echo "<script>alert('Password dan Konfirmasi tidak cocok!'); window.location='index.html';</script>";
+        echo "<script>alert('Password dan Konfirmasi tidak cocok!'); window.location='index.php';</script>";
         exit;
     }
 
@@ -46,7 +45,7 @@ if (isset($_POST['btn-register'])) {
     mysqli_stmt_store_result($stmt);
 
     if (mysqli_stmt_num_rows($stmt) > 0) {
-        echo "<script>alert('Username atau Email sudah terpakai! Ganti yang lain.'); window.location='index.html';</script>";
+        echo "<script>alert('Username atau Email sudah terpakai! Ganti yang lain.'); window.location='index.php';</script>";
         exit;
     }
     mysqli_stmt_close($stmt);
@@ -57,7 +56,7 @@ if (isset($_POST['btn-register'])) {
     mysqli_stmt_bind_param($stmtInsert, "sss", $username, $email, $hashed_password);
 
     if (mysqli_stmt_execute($stmtInsert)) {
-        echo "<script>alert('Registrasi Berhasil! Silakan Login.'); window.location='index.html';</script>";
+        echo "<script>alert('Registrasi Berhasil! Silakan Login.'); window.location='index.php';</script>";
     } else {
         echo "Error: " . mysqli_error($conn);
     }
@@ -83,7 +82,7 @@ else if (isset($_POST['btn-login'])) {
     // JIKA GAGAL
     if (!$row || !password_verify($password, $row['password'])) {
         // Kirim sinyal error ke HTML (Kotak Merah)
-        header("Location: index.html?error=gagal");
+        header("Location: index.php?error=gagal");
         exit;
     }
 
diff --git a/index.php b/index.php
index 84d0459..bad5891 100644
--- a/index.php
+++ b/index.php
@@ -5,7 +5,7 @@
     <meta name="viewport" content="width=device-width, initial-scale=1.0">
     <title>Login & Register - Memory Game</title>
 
-    <link rel="stylesheet" href="assets index/style.css">
+    <link rel="stylesheet" href="/Kelompok02-Memory-Card/assets/style.css">
 </head>
 <body>
 
@@ -66,7 +66,7 @@
         </div>
     </div>
 
-<script src="assets index/script.js"></script>
+<script src="assets/script.js"></script>
 
 </body>
 </html>
\ No newline at end of file
diff --git a/mainboard.php b/mainboard.php
index 3a16522..73fd0b8 100644
--- a/mainboard.php
+++ b/mainboard.php
@@ -1,7 +1,7 @@
 <?php
 session_start();
 if (!isset($_SESSION['user'])) {
-  header("Location: login.php");
+  header("Location: index.php");
   exit();
 }
 $user = $_SESSION['user']; // username, role, id
