diff --git a/app/static/script.js b/app/static/script.js
new file mode 100644
index 0000000..3208c19
--- /dev/null
+++ b/app/static/script.js
@@ -0,0 +1,158 @@
+let currentMode = 'random';
+let selectedPages = [];
+let quizQueue = [];
+let currentCard = null;
+let attempts = 0;
+let stats = { correct: 0, total: 0 };
+
+document.addEventListener('DOMContentLoaded', () => {
+    fetchPages();
+    document.getElementById('answer-input').addEventListener('keypress', function (e) {
+        if (e.key === 'Enter') {
+            if (document.getElementById('next-btn').style.display !== 'none') {
+                nextQuestion();
+            } else {
+                checkAnswer();
+            }
+        }
+    });
+});
+
+function setMode(mode) {
+    currentMode = mode;
+    document.querySelectorAll('.mode-select button').forEach(b => b.classList.remove('active'));
+    document.getElementById(`btn-${mode}`).classList.add('active');
+}
+
+function fetchPages() {
+    fetch('/api/pages')
+        .then(res => res.json())
+        .then(pages => {
+            const list = document.getElementById('page-list');
+            list.innerHTML = '';
+            pages.forEach(p => {
+                const div = document.createElement('div');
+                div.className = 'page-item';
+                div.innerHTML = `
+                    <input type="checkbox" id="p-${p}" value="${p}" onchange="updatePageSelection()">
+                    <label for="p-${p}">S. ${p}</label>
+                `;
+                list.appendChild(div);
+            });
+        });
+}
+
+function updatePageSelection() {
+    const checkboxes = document.querySelectorAll('#page-list input:checked');
+    selectedPages = Array.from(checkboxes).map(cb => parseInt(cb.value));
+    const disp = document.getElementById('selected-pages-display');
+    if (selectedPages.length === 0) disp.innerText = "Alle Seiten";
+    else disp.innerText = `${selectedPages.length} Seite(n) ausgewählt`;
+}
+
+function openPageOverlay() { document.getElementById('overlay').style.display = 'flex'; }
+function closeOverlay() { document.getElementById('overlay').style.display = 'none'; }
+
+function startQuiz() {
+    fetch('/api/start', {
+        method: 'POST',
+        headers: { 'Content-Type': 'application/json' },
+        body: JSON.stringify({ pages: selectedPages, mode: currentMode })
+    })
+    .then(res => res.json())
+    .then(data => {
+        quizQueue = data;
+        stats = { correct: 0, total: 0 };
+        updateProgress();
+        document.getElementById('setup-screen').style.display = 'none';
+        document.getElementById('quiz-screen').style.display = 'block';
+        nextQuestion();
+    });
+}
+
+function nextQuestion() {
+    if (quizQueue.length === 0) {
+        alert("Runde beendet! Alle Vokabeln gelernt.");
+        stopQuiz();
+        return;
+    }
+    
+    currentCard = quizQueue.pop();
+    attempts = 0;
+    
+    document.getElementById('question-label').innerText = currentCard.direction === 'de-en' ? "Deutsch -> Englisch" : "Englisch -> Deutsch";
+    document.getElementById('question-text').innerText = currentCard.question;
+    document.getElementById('answer-input').value = '';
+    document.getElementById('answer-input').focus();
+    document.getElementById('feedback-msg').innerText = '';
+    
+    document.getElementById('check-btn').style.display = 'inline-block';
+    document.getElementById('next-btn').style.display = 'none';
+}
+
+function checkAnswer() {
+    const input = document.getElementById('answer-input').value;
+    
+    fetch('/api/check', {
+        method: 'POST',
+        headers: { 'Content-Type': 'application/json' },
+        body: JSON.stringify({ input: input, correct: currentCard.answer })
+    })
+    .then(res => res.json())
+    .then(res => {
+        const feedback = document.getElementById('feedback-msg');
+        feedback.className = '';
+        
+        if (res.status === 'correct') {
+            feedback.innerText = res.msg;
+            feedback.classList.add('msg-correct');
+            stats.correct++;
+            stats.total++;
+            updateProgress();
+            setTimeout(nextQuestion, 1000);
+        } else if (res.status === 'typo') {
+            feedback.innerText = res.msg;
+            feedback.classList.add('msg-typo');
+            attempts++;
+            checkAttempts();
+        } else {
+            feedback.innerText = res.msg;
+            feedback.classList.add('msg-wrong');
+            attempts++;
+            checkAttempts();
+        }
+    });
+}
+
+function checkAttempts() {
+    if (attempts >= 3) {
+        const feedback = document.getElementById('feedback-msg');
+        feedback.innerText = `Leider nicht geschafft. Lösung: ${currentCard.answer}`;
+        document.getElementById('check-btn').style.display = 'none';
+        document.getElementById('next-btn').style.display = 'inline-block';
+        stats.total++;
+        updateProgress();
+    }
+}
+
+function updateProgress() {
+    let percent = 0;
+    if (stats.total > 0) {
+        percent = Math.round((stats.correct / stats.total) * 100);
+    }
+    const text = document.getElementById('progress-text');
+    const bar = document.getElementById('progress-bar');
+    
+    text.innerText = `${percent}% Richtig (${stats.correct}/${stats.total})`;
+    bar.style.width = `${percent}%`;
+    
+    if (percent < 50) bar.style.backgroundColor = '#dc3545';
+    else if (percent < 65) bar.style.backgroundColor = '#f08080';
+    else if (percent < 85) bar.style.backgroundColor = '#ffc107';
+    else bar.style.backgroundColor = '#28a745';
+}
+
+function stopQuiz() {
+    document.getElementById('quiz-screen').style.display = 'none';
+    document.getElementById('setup-screen').style.display = 'block';
+}
diff --git a/app/static/style.css b/app/static/style.css
new file mode 100644
index 0000000..1b7008d
--- /dev/null
+++ b/app/static/style.css
@@ -0,0 +1,207 @@
+:root {
+    --primary: #007bff;
+    --success: #28a745;
+    --danger: #dc3545;
+    --warning: #ffc107;
+    --secondary: #6c757d;
+    --bg: #f4f4f9;
+    --card-bg: #ffffff;
+    --text: #333;
+}
+body {
+    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
+    background-color: var(--bg);
+    color: var(--text);
+    margin: 0;
+    display: flex;
+    flex-direction: column;
+    min-height: 100vh;
+}
+.container {
+    flex: 1;
+    display: flex;
+    flex-direction: column;
+    align-items: center;
+    padding: 20px;
+    max-width: 600px;
+    margin: 0 auto;
+    width: 100%;
+    box-sizing: border-box;
+}
+h1 {
+    font-size: 1.8rem;
+    margin-bottom: 20px;
+    text-align: center;
+    color: #444;
+}
+.card {
+    background: var(--card-bg);
+    padding: 25px;
+    border-radius: 12px;
+    box-shadow: 0 4px 12px rgba(0,0,0,0.08);
+    width: 100%;
+    text-align: center;
+    box-sizing: border-box;
+    margin-bottom: 20px;
+}
+.label {
+    font-size: 0.9rem;
+    color: #666;
+    text-transform: uppercase;
+    letter-spacing: 1px;
+    margin-bottom: 10px;
+}
+.question {
+    font-size: 1.6rem;
+    font-weight: 700;
+    margin: 15px 0 25px 0;
+    word-wrap: break-word;
+}
+input[type="text"] {
+    width: 100%;
+    padding: 12px 15px;
+    font-size: 1.1rem;
+    border: 2px solid #ddd;
+    border-radius: 8px;
+    box-sizing: border-box;
+    outline: none;
+    transition: border-color 0.3s;
+    -webkit-appearance: none;
+}
+input[type="text"]:focus {
+    border-color: var(--primary);
+}
+button {
+    width: 100%;
+    padding: 14px;
+    border: none;
+    border-radius: 8px;
+    cursor: pointer;
+    font-size: 1rem;
+    font-weight: 600;
+    margin-bottom: 10px;
+    transition: transform 0.1s, opacity 0.2s;
+    -webkit-tap-highlight-color: transparent;
+}
+button:active {
+    transform: scale(0.98);
+}
+.mode-select {
+    display: grid;
+    grid-template-columns: 1fr 1fr 1fr;
+    gap: 8px;
+    margin-bottom: 20px;
+    width: 100%;
+}
+.mode-select button {
+    font-size: 0.9rem;
+    padding: 10px 5px;
+    background: #e0e0e0;
+    color: #555;
+    margin-bottom: 0;
+}
+.mode-select button.active {
+    background: var(--primary);
+    color: white;
+}
+.action-btn.primary { background-color: var(--primary); color: white; }
+.action-btn.secondary { background-color: var(--secondary); color: white; }
+.action-btn.danger { background-color: var(--danger); color: white; }
+.action-btn { margin-top: 5px; }
+#feedback-msg {
+    margin-top: 15px;
+    min-height: 1.2em;
+    font-weight: 500;
+    line-height: 1.4;
+}
+.msg-correct { color: var(--success); }
+.msg-wrong { color: var(--danger); }
+.msg-typo { color: #d39e00; }
+.overlay {
+    display: none;
+    position: fixed;
+    top: 0; left: 0;
+    width: 100%; height: 100%;
+    background: rgba(0,0,0,0.6);
+    z-index: 1000;
+    justify-content: center;
+    align-items: center;
+    padding: 20px;
+    box-sizing: border-box;
+}
+.overlay-content {
+    background: white;
+    padding: 20px;
+    border-radius: 12px;
+    width: 100%;
+    max-width: 400px;
+    max-height: 80vh;
+    display: flex;
+    flex-direction: column;
+}
+.page-grid {
+    display: grid;
+    grid-template-columns: repeat(auto-fill, minmax(70px, 1fr));
+    gap: 10px;
+    margin: 20px 0;
+    overflow-y: auto;
+    flex: 1;
+}
+.page-item { position: relative; }
+.page-item input[type="checkbox"] {
+    position: absolute;
+    opacity: 0;
+    width: 100%;
+    height: 100%;
+    cursor: pointer;
+}
+.page-item label {
+    display: block;
+    padding: 10px;
+    background: #f0f0f0;
+    border-radius: 6px;
+    text-align: center;
+    font-weight: bold;
+    color: #555;
+    border: 2px solid transparent;
+    transition: all 0.2s;
+}
+.page-item input:checked + label {
+    background: #e3f2fd;
+    border-color: var(--primary);
+    color: var(--primary);
+}
+.progress-container {
+    background: #fff;
+    border-top: 1px solid #eee;
+    padding: 15px 20px;
+    width: 100%;
+    box-sizing: border-box;
+    position: sticky;
+    bottom: 0;
+}
+.progress-text {
+    text-align: center;
+    margin-bottom: 8px;
+    font-size: 0.9rem;
+    font-weight: 600;
+    color: #555;
+}
+.progress-bar-bg {
+    background: #e9ecef;
+    height: 12px;
+    border-radius: 6px;
+    overflow: hidden;
+}
+.progress-bar-fill {
+    height: 100%;
+    width: 0%;
+    transition: width 0.4s ease, background-color 0.4s ease;
+}
+@media (max-width: 480px) {
+    h1 { font-size: 1.5rem; }
+    .card { padding: 20px; }
+    .question { font-size: 1.4rem; }
+    .mode-select { display: flex; flex-direction: column; }
+    .mode-select button { width: 100%; padding: 12px; }
+}