diff --git a/index.html b/index.html
deleted file mode 100644
index 58a3d15..0000000
--- a/index.html
+++ /dev/null
@@ -1,321 +0,0 @@
-<!DOCTYPE html>
-<html lang="id">
-<head>
-    <meta charset="UTF-8">
-    <meta name="viewport" content="width=device-width, initial-scale=1.0">
-    <title>Login & Register - Memory Game</title>
-
-<style>
-/* --- 1. RESET & BACKGROUND UTAMA --- */
-* { box-sizing: border-box; }
-
-body {
-    margin: 0;
-    font-family: 'Segoe UI', Arial, sans-serif;
-    background: linear-gradient(135deg, #d9a7ff, #fbc2eb, #a1c4fd);
-    min-height: 100vh;
-    display: flex;
-    justify-content: center;
-    align-items: center;
-    overflow-x: hidden;
-}
-
-/* --- 2. CONTAINER KARTU (DENGAN ANIMASI RESIZE) --- */
-.auth-card {
-    width: 380px;
-    background: rgba(255, 255, 255, 0.95);
-    backdrop-filter: blur(12px);
-    border-radius: 25px;
-    box-shadow: 0 10px 30px rgba(0,0,0,0.2);
-    overflow: hidden; 
-    position: relative;
-    z-index: 10;
-    /* PENTING: Transisi halus saat tinggi berubah */
-    transition: height 0.4s cubic-bezier(0.25, 1, 0.5, 1); 
-}
-
-.form-wrapper {
-    width: 100%;
-}
-
-.forms-container {
-    display: flex;
-    width: 200%; /* Lebar 200% untuk menampung Login & Register berdampingan */
-    transition: transform 0.5s cubic-bezier(0.68, -0.55, 0.27, 1.55);
-    align-items: flex-start; 
-}
-
-.auth-card.active .forms-container {
-    transform: translateX(-50%); /* Geser ke kiri untuk menampilkan Register */
-}
-
-/* --- 3. STYLING FORM --- */
-form {
-    width: 50%;
-    flex-shrink: 0;
-    padding: 40px;
-    display: flex;
-    flex-direction: column;
-    align-items: center;
-}
-
-h2 {
-    margin: 0 0 10px;
-    text-align: center;
-    font-size: 26px;
-    background: linear-gradient(45deg, purple, hotpink);
-    -webkit-background-clip: text;
-    background-clip: text;
-    color: transparent;
-}
-
-.subtitle {
-    text-align: center; color: gray; font-size: 14px; margin-bottom: 25px;
-}
-
-label {
-    font-size: 14px; color: #444; width: 100%; margin-bottom: 6px; font-weight: bold;
-}
-
-input {
-    width: 100%; padding: 12px; border-radius: 12px;
-    border: 2px solid #ccc; background: #fafafa;
-    margin-bottom: 15px; font-size: 14px; transition: 0.3s;
-}
-
-input:focus { outline: none; border-color: purple; background: #fff; box-shadow: 0 0 8px rgba(128, 0, 128, 0.1); }
-
-/* Tombol */
-.btn-submit {
-    width: 100%; padding: 14px;
-    background: linear-gradient(45deg, purple, hotpink);
-    color: white; border-radius: 15px; border: none;
-    cursor: pointer; font-size: 16px; font-weight: bold;
-    transition: 0.25s ease; margin-top: 10px;
-    box-shadow: 0 4px 15px rgba(128, 0, 128, 0.2);
-}
-.btn-submit:hover { transform: scale(1.02); }
-
-/* Link Switch */
-.switch-text { margin-top: 20px; font-size: 14px; color: #555; }
-.switch-text a { color: purple; text-decoration: none; font-weight: bold; cursor: pointer; }
-.switch-text a:hover { text-decoration: underline; }
-
-/* --- ERROR BOX (KOTAK MERAH) --- */
-.error-box {
-    width: 100%; 
-    color: #d8000c; 
-    background: #ffbaba;
-    border: 1px solid #ff7675;
-    padding: 12px; 
-    border-radius: 10px; 
-    margin-bottom: 20px;
-    font-size: 13px; 
-    text-align: center; 
-    display: none; /* Default sembunyi */
-    font-weight: bold;
-    animation: fadeIn 0.3s;
-}
-
-@keyframes fadeIn {
-    from { opacity: 0; transform: translateY(-10px); }
-    to { opacity: 1; transform: translateY(0); }
-}
-
-/* Dekorasi Buah */
-.fruit { position: absolute; width: 90px; opacity: 0.85; animation: float 6s infinite ease-in-out, drift 15s infinite linear; pointer-events: none; z-index: 1; }
-.f1 { top: 8%; left: 10%; width: 80px; } .f2 { top: 65%; right: 12%; } .f3 { top: 22%; right: 55%; width: 60px; }
-.f4 { bottom: 15%; left: 28%; } .f5 { bottom: 10%; right: 30%; width: 70px; } .f6 { top: 40%; left: 50%; }
-.f7 { bottom: 30%; left: 15%; width: 50px; } .f8 { top: 75%; right: 40%; } .f9 { top: 50%; left: 80%; width: 85px; }
-.f10 { bottom: 20%; right: 5%; }
-@keyframes float { 0%, 100% { transform: translateY(0); } 50% { transform: translateY(-20px) rotate(6deg); } }
-@keyframes drift { 0%, 100% { transform: translateX(0); } 50% { transform: translateX(15px); } }
-
-/* Glitter */
-.glitter { position: absolute; width: 4px; height: 4px; background: purple; border-radius: 50%; opacity: 0; animation: glitter-burst 2s infinite ease-out; pointer-events: none; z-index: 11; }
-@keyframes glitter-burst { 0% { transform: scale(0.4); opacity: 0.9; } 100% { transform: scale(1) translate(var(--x), var(--y)); opacity: 0; } }
-</style>
-</head>
-<body>
-
-    <img src="images/fruit1.png" class="fruit f1"><img src="images/fruit2.png" class="fruit f2">
-    <img src="images/fruit3.png" class="fruit f3"><img src="images/fruit4.png" class="fruit f4">
-    <img src="images/fruit5.png" class="fruit f5"><img src="images/fruit6.png" class="fruit f6">
-    <img src="images/fruit7.png" class="fruit f7"><img src="images/fruit8.png" class="fruit f8">
-    <img src="images/fruit9.png" class="fruit f9"><img src="images/fruit10.png" class="fruit f10">
-
-    <div class="auth-card" id="authCard">
-        <div class="form-wrapper">
-            <div class="forms-container">
-
-                <form id="loginForm" action="auth.php" method="POST">
-                    <h2>Selamat Datang! ✨</h2>
-                    <p class="subtitle">Login untuk bermain</p>
-
-                    <div id="loginError" class="error-box"></div>
-
-                    <label>Username</label>
-                    <input type="text" id="loginUser" name="username" placeholder="Masukan Username" required>
-
-                    <label>Password</label>
-                    <input type="password" id="loginPass" name="password" placeholder="Masukan Password" required>
-
-                    <button type="submit" class="btn-submit" name="btn-login">Login Sekarang</button>
-
-                    <p class="switch-text">
-                        Belum punya akun? <a onclick="toggleAuth('register')">Daftar Sekarang</a>
-                    </p>
-                </form>
-
-                <form id="registerForm" action="auth.php" method="POST">
-                    <h2>Buat Akun Baru ✨</h2>
-                    <p class="subtitle">Daftar petualangan baru</p>
-
-                    <div id="regError" class="error-box"></div>
-
-                    <label>Username</label>
-                    <input type="text" id="regUser" name="username" placeholder="Pilih Username" required>
-
-                    <label>Email</label>
-                    <input type="email" id="regEmail" name="email" placeholder="Masukan Email" required>
-
-                    <label>Password</label>
-                    <input type="password" id="regPass" name="password" placeholder="Minimal 6 karakter" required>
-
-                    <label>Konfirmasi Password</label>
-                    <input type="password" id="regConfirm" name="confirm_password" placeholder="Ulangi Password" required>
-                    <button type="submit" class="btn-submit" name="btn-register">Daftar Sekarang</button>
-
-                    <p class="switch-text">
-                        Sudah punya akun? <a onclick="toggleAuth('login')">Login Sekarang</a>
-                    </p>
-                </form>
-
-            </div>
-        </div>
-    </div>
-
-<script>
-    /* LOGIC JAVASCRIPT UTAMA 
-       Menghubungkan PHP Error -> Tampilan Kotak Merah & Resize & Validasi
-    */
-
-    const card = document.getElementById("authCard");
-    const loginForm = document.getElementById("loginForm");
-    const registerForm = document.getElementById("registerForm");
-
-    // 1. FUNGSI MENGATUR TINGGI (RESIZE OTOMATIS)
-    function setHeight() {
-        const isActive = card.classList.contains("active");
-        // Hitung tinggi form yang sedang aktif (termasuk jika ada error box)
-        const formHeight = isActive ? registerForm.offsetHeight : loginForm.offsetHeight;
-        
-        // Terapkan tinggi ke card
-        card.style.height = formHeight + "px";
-    }
-
-    // 2. FUNGSI PINDAH LOGIN <-> REGISTER
-    function toggleAuth(mode) {
-        // Reset Error Box saat pindah
-        document.getElementById("loginError").style.display = "none";
-        document.getElementById("regError").style.display = "none";
-
-        if (mode === 'register') {
-            card.classList.add("active");
-        } else {
-            card.classList.remove("active");
-        }
-        
-        // Tunggu animasi slide sebentar, baru resize
-        setTimeout(setHeight, 50); 
-    }
-
-    // 3. DETEKSI ERROR DARI PHP
-    window.addEventListener("DOMContentLoaded", function() {
-        setHeight(); // Set tinggi awal
-
-        const urlParams = new URLSearchParams(window.location.search);
-        const errorStatus = urlParams.get('error');
-
-        if (errorStatus === 'gagal') {
-            const errorBox = document.getElementById("loginError");
-            errorBox.innerText = "Username atau Password salah!";
-            errorBox.style.display = "block";
-            
-            setHeight();
-            window.history.replaceState(null, null, window.location.pathname);
-        }
-    });
-
-    window.addEventListener("resize", setHeight);
-
-    // 4. EFEK GLITTER (HIASAN)
-    document.addEventListener("DOMContentLoaded", function () {
-        for (let i = 0; i < 15; i++) {
-            const g = document.createElement("div");
-            g.className = "glitter";
-            g.style.setProperty("--x", (Math.random() * 200 - 100) + "px");
-            g.style.setProperty("--y", (Math.random() * 200 - 100) + "px");
-            g.style.left = (Math.random() * 100) + "%";
-            g.style.top = (Math.random() * 100) + "%";
-            g.style.animationDelay = (Math.random() * 2) + "s";
-            card.appendChild(g);
-        }
-    });
-
-    // ==========================================
-    // 5. VALIDASI REGISTER (YANG BARU DITAMBAHKAN)
-    // ==========================================
-    if (registerForm) {
-        registerForm.addEventListener("submit", function(event) {
-            // Tahan pengiriman form ke PHP dulu
-            event.preventDefault();
-
-            // Ambil nilai dari inputan (Pastikan ID di HTML sudah sesuai ya!)
-            const username = document.getElementById("regUser").value;
-            const email    = document.getElementById("regEmail").value;
-            const password = document.getElementById("regPass").value;
-            const confirmPassword = document.getElementById("regConfirm").value;
-
-            // Fungsi helper untuk menampilkan error di kotak merah Register
-            function showError(pesan) {
-                const errorBox = document.getElementById("regError");
-                errorBox.innerText = pesan;
-                errorBox.style.display = "block";
-                setHeight(); // PENTING: Resize kartu agar pesan error muat
-            }
-
-            // --- Mulai Cek Validasi ---
-
-            // 1. Cek Kosong
-            if (!username || !email || !password || !confirmPassword) {
-                showError("Semua field harus diisi!");
-                return;
-            }
-
-            // 2. Cek Format Email
-            if (!/^[^\s@]+@[^\s@]+\.[^\s@]+$/.test(email)) {
-                showError("Format email tidak valid");
-                return;
-            }
-
-            // 3. Cek Panjang Password
-            if (password.length < 6) {
-                showError("Password minimal 6 karakter");
-                return;
-            }
-
-            // 4. Cek Kesamaan Password
-            if (password !== confirmPassword) {
-                showError("Password dan konfirmasi password tidak cocok");
-                return;
-            }
-
-            // Jika semua aman, baru kirim ke auth.php
-            this.submit();
-        });
-    }
-</script>
-
-</body>
-</html>
\ No newline at end of file
diff --git a/index.php b/index.php
new file mode 100644
index 0000000..592fb9f
--- /dev/null
+++ b/index.php
@@ -0,0 +1,218 @@
+<?php
+session_start();
+
+// Kalau sudah login, langsung ke mainboard
+if (isset($_SESSION['login'])) {
+    header("Location: mainboard.php");
+    exit;
+}
+?>
+<!DOCTYPE html>
+<html lang="id">
+<head>
+    <meta charset="UTF-8">
+    <meta name="viewport" content="width=device-width, initial-scale=1.0">
+    <title>Login & Register - Memory Game</title>
+
+<style>
+/* --- 1. RESET & BACKGROUND UTAMA --- */
+* { box-sizing: border-box; }
+body {
+    margin: 0;
+    font-family: 'Segoe UI', Arial, sans-serif;
+    background: linear-gradient(135deg, #d9a7ff, #fbc2eb, #a1c4fd);
+    min-height: 100vh;
+    display: flex;
+    justify-content: center;
+    align-items: center;
+    overflow-x: hidden;
+}
+
+/* --- 2. CONTAINER KARTU --- */
+.auth-card {
+    width: 380px;
+    background: rgba(255,255,255,.95);
+    backdrop-filter: blur(12px);
+    border-radius: 25px;
+    box-shadow: 0 10px 30px rgba(0,0,0,.2);
+    overflow: hidden;
+    position: relative;
+    transition: height .4s cubic-bezier(.25,1,.5,1);
+}
+.forms-container {
+    display: flex;
+    width: 200%;
+    transition: transform .5s cubic-bezier(.68,-.55,.27,1.55);
+}
+.auth-card.active .forms-container { transform: translateX(-50%); }
+
+/* --- FORM --- */
+form {
+    width: 50%;
+    padding: 40px;
+    display: flex;
+    flex-direction: column;
+    align-items: center;
+}
+h2 {
+    margin-bottom: 10px;
+    font-size: 26px;
+    background: linear-gradient(45deg,purple,hotpink);
+    -webkit-background-clip: text;
+    color: transparent;
+}
+label { width:100%; font-weight:bold; margin-bottom:6px; }
+input {
+    width:100%;
+    padding:12px;
+    border-radius:12px;
+    border:2px solid #ccc;
+    margin-bottom:15px;
+}
+.btn-submit {
+    width:100%;
+    padding:14px;
+    border:none;
+    border-radius:15px;
+    background:linear-gradient(45deg,purple,hotpink);
+    color:#fff;
+    font-weight:bold;
+    cursor:pointer;
+}
+
+/* ERROR BOX */
+.error-box {
+    width:100%;
+    display:none;
+    padding:12px;
+    border-radius:10px;
+    margin-bottom:20px;
+    font-size:13px;
+    font-weight:bold;
+    text-align:center;
+    background:#ffbaba;
+    border:1px solid #ff7675;
+}
+</style>
+</head>
+
+<body>
+
+<div class="auth-card" id="authCard">
+<div class="forms-container">
+
+<!-- LOGIN -->
+<form id="loginForm" action="auth.php" method="POST">
+    <h2>Selamat Datang ✨</h2>
+    <div id="loginError" class="error-box"></div>
+
+    <label>Username</label>
+    <input type="text" name="username" required>
+
+    <label>Password</label>
+    <input type="password" name="password" required>
+
+    <button class="btn-submit" name="btn-login">Login Sekarang</button>
+    <p class="switch-text">Belum punya akun?
+        <a onclick="toggleAuth('register')">Daftar</a>
+    </p>
+</form>
+
+<!-- REGISTER -->
+<form id="registerForm" action="auth.php" method="POST">
+    <h2>Buat Akun ✨</h2>
+    <div id="regError" class="error-box"></div>
+
+    <label>Username</label>
+    <input type="text" id="regUser" name="username" required>
+
+    <label>Email</label>
+    <input type="email" id="regEmail" name="email" required>
+
+    <label>Password</label>
+    <input type="password" id="regPass" name="password" required>
+
+    <label>Konfirmasi Password</label>
+    <input type="password" id="regConfirm" name="confirm_password" required>
+
+    <button class="btn-submit" name="btn-register">Daftar</button>
+    <p class="switch-text">Sudah punya akun?
+        <a onclick="toggleAuth('login')">Login</a>
+    </p>
+</form>
+
+</div>
+</div>
+
+<script>
+const card = document.getElementById("authCard");
+const loginForm = document.getElementById("loginForm");
+const registerForm = document.getElementById("registerForm");
+
+function setHeight() {
+    const h = card.classList.contains("active")
+        ? registerForm.offsetHeight
+        : loginForm.offsetHeight;
+    card.style.height = h + "px";
+}
+
+function toggleAuth(mode){
+    document.getElementById("loginError").style.display = "none";
+    document.getElementById("regError").style.display = "none";
+    card.classList.toggle("active", mode === 'register');
+    setTimeout(setHeight, 50);
+}
+
+window.addEventListener("DOMContentLoaded", () => {
+    setHeight();
+    const params = new URLSearchParams(window.location.search);
+
+    // LOGIN GAGAL
+    if (params.get("error") === "gagal") {
+        const box = document.getElementById("loginError");
+        box.innerText = "Username atau Password salah!";
+        box.style.display = "block";
+        setHeight();
+    }
+
+    // REGISTER BERHASIL
+    if (params.get("register") === "success") {
+        const box = document.getElementById("loginError");
+        box.innerText = "Registrasi berhasil! Silakan login 🎉";
+        box.style.display = "block";
+        box.style.background = "#d4edda";
+        box.style.color = "#155724";
+        box.style.border = "1px solid #c3e6cb";
+        card.classList.remove("active");
+        setHeight();
+    }
+
+    window.history.replaceState(null, null, window.location.pathname);
+});
+
+// VALIDASI REGISTER
+registerForm.addEventListener("submit", function(e){
+    e.preventDefault();
+    const u = regUser.value,
+          eMail = regEmail.value,
+          p = regPass.value,
+          c = regConfirm.value;
+
+    function show(msg){
+        const box = regError;
+        box.innerText = msg;
+        box.style.display = "block";
+        setHeight();
+    }
+
+    if (!u || !eMail || !p || !c) return show("Semua field wajib diisi");
+    if (!/^[^\s@]+@[^\s@]+\.[^\s@]+$/.test(eMail)) return show("Email tidak valid");
+    if (p.length < 6) return show("Password minimal 6 karakter");
+    if (p !== c) return show("Password tidak cocok");
+
+    this.submit();
+});
+</script>
+
+</body>
+</html>
