diff --git a/launcher/launcher/src/resources/ui/index.html b/launcher/launcher/src/resources/ui/index.html
index 3864035..13569ac 100644
--- a/launcher/launcher/src/resources/ui/index.html
+++ b/launcher/launcher/src/resources/ui/index.html
@@ -12,7 +12,7 @@
     <div id="app">
         <!-- Login Screen -->
         <div id="login-screen" class="screen">
-            <div class="login-container">
+            <div class="login-container" id="login-container">
                 <div class="login-header">
                     <div class="brand-icon">
                         <svg width="40" height="40" viewBox="0 0 56 56" fill="none">
@@ -26,8 +26,9 @@
                             </defs>
                         </svg>
                     </div>
-                    <h1 class="login-title" data-i18n="login.title">Sign In</h1>
-                    <p class="login-subtitle" data-i18n="login.subtitle">Welcome back to ZernMC</p>
+                    <h1 class="login-title" id="login-title" data-i18n="login.title">Sign In</h1>
+                    <p class="login-subtitle" id="login-subtitle" data-i18n="login.subtitle">Welcome back to ZernMC</p>
+                    <span id="version" class="hidden">1.0.12</span>
                 </div>
 
                 <form id="login-form" class="login-form">
@@ -39,14 +40,18 @@
                         <label for="password" data-i18n="login.password">Password</label>
                         <input type="password" id="password" autocomplete="current-password" required>
                     </div>
+                    <div class="field hidden" id="confirm-field">
+                        <label for="confirm-password" data-i18n="login.confirm">Confirm Password</label>
+                        <input type="password" id="confirm-password" autocomplete="new-password">
+                    </div>
                     <p id="login-error" class="error-msg hidden"></p>
                     <button type="submit" class="btn-primary" id="login-btn">
-                        <span class="btn-label" data-i18n="login.title">Sign In</span>
+                        <span class="btn-label" id="login-btn-label" data-i18n="login.title">Sign In</span>
                         <div class="spinner hidden"></div>
                     </button>
-                    <div class="login-footer">
-                        <span data-i18n="login.hint">Need an account?</span>
-                        <span class="login-footer-action" data-i18n="login.autoHint">It's free — just sign in</span>
+                    <div class="login-footer" id="login-footer">
+                        <span id="footer-hint" data-i18n="login.hint">Need an account?</span>
+                        <span class="login-footer-action" id="footer-action" data-i18n="login.register">Register</span>
                     </div>
                 </form>
             </div>
diff --git a/launcher/launcher/src/resources/ui/launcher.js b/launcher/launcher/src/resources/ui/launcher.js
index 18f9b2d..72bf2fa 100644
--- a/launcher/launcher/src/resources/ui/launcher.js
+++ b/launcher/launcher/src/resources/ui/launcher.js
@@ -6,7 +6,13 @@ const LOCALES = {
         'login.title': 'Sign In', 'login.username': 'Username', 'login.password': 'Password',
         'login.subtitle': 'Welcome back to ZernMC',
         'login.hint': 'Need an account?',
-        'login.autoHint': "It's free \u2014 just sign in",
+        'login.register': 'Register',
+        'login.registerTitle': 'Create Account',
+        'login.registerSubtitle': 'Join ZernMC today',
+        'login.hasAccount': 'Already have an account?',
+        'login.confirm': 'Confirm Password',
+        'login.passMismatch': 'Passwords do not match',
+        'login.passTooShort': 'Password must be at least 3 characters',
         'login.signingIn': 'Signing in...',
         'loading.text': 'Loading...',
         'sidebar.serverPacks': 'Server Packs', 'sidebar.localPacks': 'Local Packs',
@@ -184,7 +190,13 @@ const LOCALES = {
         'login.title': 'Вход', 'login.username': 'Логин', 'login.password': 'Пароль',
         'login.subtitle': 'С возвращением в ZernMC',
         'login.hint': 'Нет аккаунта?',
-        'login.autoHint': 'Это бесплатно \u2014 просто войдите',
+        'login.register': 'Регистрация',
+        'login.registerTitle': 'Создать аккаунт',
+        'login.registerSubtitle': 'Присоединяйтесь к ZernMC',
+        'login.hasAccount': 'Уже есть аккаунт?',
+        'login.confirm': 'Подтвердите пароль',
+        'login.passMismatch': 'Пароли не совпадают',
+        'login.passTooShort': 'Пароль должен быть минимум 3 символа',
         'login.signingIn': 'Вход...',
         'loading.text': 'Загрузка...',
         'sidebar.serverPacks': 'Серверные сборки', 'sidebar.localPacks': 'Локальные сборки',
@@ -419,28 +431,43 @@ class ZernMCLauncher {
     initBg() {
         const c = document.getElementById('bg-canvas');
         const ctx = c.getContext('2d');
-        let mx = 0, my = 0, ox = 0, oy = 0;
+        let t = 0, mode = 'login', modePulse = 0;
+
+        this.setWaveMode = m => { mode = m; modePulse = 1; };
+
+        const resize = () => { c.width = window.innerWidth; c.height = window.innerHeight; };
+        window.addEventListener('resize', resize);
 
-        const resize = () => { c.width = window.innerWidth; c.height = window.innerHeight; draw(); };
         const draw = () => {
             ctx.clearRect(0, 0, c.width, c.height);
-            const gs = 48, r = 1.2;
-            ctx.fillStyle = '#e94560';
-            for (let x = 0; x <= c.width; x += gs)
-                for (let y = 0; y <= c.height; y += gs)
-                    ctx.beginPath(), ctx.arc(x + ox * 8, y + oy * 8, r, 0, Math.PI * 2), ctx.fill();
-        };
-        window.addEventListener('resize', resize);
-        window.addEventListener('mousemove', e => {
-            mx = (e.clientX / innerWidth - 0.5) * 2;
-            my = (e.clientY / innerHeight - 0.5) * 2;
-        });
-        const anim = () => {
-            ox += (mx * 0.3 - ox) * 0.04;
-            oy += (my * 0.3 - oy) * 0.04;
-            draw();
-            requestAnimationFrame(anim);
+            const w = c.width, h = c.height;
+            modePulse += (0 - modePulse) * 0.03;
+
+            const baseAlpha = 0.04 + modePulse * 0.03;
+            const amp = 20 + modePulse * 10;
+            const freq = 0.008 + modePulse * 0.003;
+            const speed = 0.008;
+            const lines = 5;
+
+            for (let i = 0; i < lines; i++) {
+                const yOff = (h / (lines + 1)) * (i + 1);
+                const alpha = baseAlpha * (1 - i * 0.12);
+                ctx.beginPath();
+                for (let x = 0; x <= w; x += 2) {
+                    const wave = Math.sin(x * freq + t * speed + i * 1.8) * amp;
+                    const wave2 = Math.sin(x * freq * 0.5 + t * speed * 0.7 + i * 2.5) * amp * 0.5;
+                    const y = yOff + wave + wave2;
+                    x === 0 ? ctx.moveTo(x, y) : ctx.lineTo(x, y);
+                }
+                ctx.strokeStyle = `rgba(233, 69, 96, ${alpha})`;
+                ctx.lineWidth = 1.2;
+                ctx.stroke();
+            }
+
+            t++;
         };
+
+        const anim = () => { draw(); requestAnimationFrame(anim); };
         resize();
         anim();
     }
@@ -513,30 +540,37 @@ class ZernMCLauncher {
         e.preventDefault();
         const username = document.getElementById('username').value.trim();
         const password = document.getElementById('password').value;
-        console.log('handleLogin: attempting login for', username);
         const errEl = document.getElementById('login-error');
         const btn = document.getElementById('login-btn');
-        const label = btn.querySelector('.btn-label');
+        const label = document.getElementById('login-btn-label');
         const spinner = btn.querySelector('.spinner');
 
         if (!username || !password) { this.showLoginError(t('toast.enterCredentials')); return; }
 
+        if (this._registerMode) {
+            const confirm = document.getElementById('confirm-password').value;
+            if (password !== confirm) { this.showLoginError(t('login.passMismatch')); return; }
+            if (password.length < 3) { this.showLoginError(t('login.passTooShort')); return; }
+        }
+
         btn.disabled = true;
         label.textContent = t('login.signingIn');
         spinner.classList.remove('hidden');
 
-        const r = await this.req('/login', { method: 'POST', body: JSON.stringify({ username, password }) });
+        const endpoint = this._registerMode ? '/register' : '/login';
+        const r = await this.req(endpoint, { method: 'POST', body: JSON.stringify({ username, password }) });
 
         btn.disabled = false;
-        label.textContent = t('login.title');
+        label.textContent = this._registerMode ? t('login.register') : t('login.title');
         spinner.classList.add('hidden');
 
         if (r.success) {
             this.state.account = r.data;
             this.enterMain();
-            this.toast(tr('toast.welcome', null, {username: r.data.username}), 'success');
+            const key = this._registerMode ? 'toast.accountCreated' : 'toast.welcome';
+            this.toast(tr(key, null, {username: r.data.username}), 'success');
         } else {
-            if (r.error && (r.error.includes('not found') || r.error.includes('Invalid'))) {
+            if (!this._registerMode && r.error && (r.error.includes('not found') || r.error.includes('Invalid'))) {
                 var reg = await this.req('/register', { method: 'POST', body: JSON.stringify({ username, password }) });
                 if (reg.success) {
                     this.state.account = reg.data;
@@ -549,6 +583,45 @@ class ZernMCLauncher {
         }
     }
 
+    toggleMode() {
+        this._registerMode = !this._registerMode;
+        const isReg = this._registerMode;
+        const container = document.getElementById('login-container');
+        const title = document.getElementById('login-title');
+        const subtitle = document.getElementById('login-subtitle');
+        const btnLabel = document.getElementById('login-btn-label');
+        const footerHint = document.getElementById('footer-hint');
+        const footerAction = document.getElementById('footer-action');
+        const confirmField = document.getElementById('confirm-field');
+
+        container.style.transform = 'translateY(-4px)';
+        container.style.opacity = '0.6';
+
+        setTimeout(() => {
+            title.textContent = isReg ? t('login.registerTitle') : t('login.title');
+            subtitle.textContent = isReg ? t('login.registerSubtitle') : t('login.subtitle');
+            btnLabel.textContent = isReg ? t('login.register') : t('login.title');
+            footerHint.textContent = isReg ? t('login.hasAccount') : t('login.hint');
+            footerAction.textContent = isReg ? t('login.title') : t('login.register');
+
+            if (isReg) {
+                confirmField.classList.remove('hidden');
+                document.getElementById('confirm-password').required = true;
+            } else {
+                confirmField.classList.add('hidden');
+                document.getElementById('confirm-password').required = false;
+                document.getElementById('confirm-password').value = '';
+            }
+
+            document.getElementById('login-error').classList.add('hidden');
+
+            container.style.transform = '';
+            container.style.opacity = '';
+
+            if (this.setWaveMode) this.setWaveMode(isReg ? 'register' : 'login');
+        }, 150);
+    }
+
     showLoginError(msg) {
         const el = document.getElementById('login-error');
         el.textContent = msg;
@@ -604,6 +677,7 @@ class ZernMCLauncher {
     // ==================== NAV ====================
     bindEvents() {
         document.getElementById('login-form').addEventListener('submit', e => this.handleLogin(e));
+        document.getElementById('login-footer').addEventListener('click', () => this.toggleMode());
         document.getElementById('logout-btn').addEventListener('click', () => this.logout());
         document.getElementById('settings-btn').addEventListener('click', () => this.switchView('settings'));
 
diff --git a/launcher/launcher/src/resources/ui/style.css b/launcher/launcher/src/resources/ui/style.css
index e8caeab..4d9bf59 100644
--- a/launcher/launcher/src/resources/ui/style.css
+++ b/launcher/launcher/src/resources/ui/style.css
@@ -59,21 +59,26 @@ body {
 
 /* ========== LOGIN ========== */
 .login-container {
+    position: relative; z-index: 1;
     background: var(--bg-elevated);
     border-radius: var(--radius-md);
     padding: 32px 32px 24px;
     width: 100%;
     max-width: 360px;
     box-shadow: 0 8px 40px rgba(0,0,0,0.5);
+    transition: transform 0.35s ease, opacity 0.35s ease;
 }
 
-.login-header { text-align: center; margin-bottom: 28px; }
+.login-header { text-align: center; margin-bottom: 28px; overflow: hidden; }
 .brand-icon { margin-bottom: 12px; }
 .login-title {
     font-size: 22px; font-weight: 700;
-    color: var(--text);
+    color: var(--text); transition: transform 0.3s ease, opacity 0.3s ease;
+}
+.login-subtitle {
+    color: var(--text-muted); font-size: 13px; margin-top: 4px;
+    transition: transform 0.3s ease, opacity 0.3s ease;
 }
-.login-subtitle { color: var(--text-muted); font-size: 13px; margin-top: 4px; }
 
 .login-form { display: flex; flex-direction: column; gap: 16px; }
 
@@ -101,6 +106,11 @@ body {
     font-family: var(--font); cursor: pointer; outline: none;
 }
 .field select:focus { border-color: var(--accent); }
+#confirm-field {
+    transition: opacity 0.3s ease, max-height 0.3s ease, margin 0.3s ease;
+    overflow: hidden; max-height: 60px; opacity: 1; margin: 0;
+}
+#confirm-field.hidden { max-height: 0; opacity: 0; margin: 0; display: block !important; padding: 0; overflow: hidden; pointer-events: none; }
 
 .btn-primary {
     width: 100%; padding: 14px; border: none; border-radius: 4px;