diff --git a/src/public/css/style.css b/src/public/css/style.css
index 41b33d1..0562300 100644
--- a/src/public/css/style.css
+++ b/src/public/css/style.css
@@ -270,6 +270,9 @@ body {
 .btn-primary:hover { filter: brightness(1.1); }
 .btn-primary:disabled { filter: none; }
 
+.btn-download { color: var(--success); border-color: var(--success); font-size: 16px; }
+.btn-download:not(:disabled):hover { background: rgba(48, 209, 88, 0.12); }
+
 /* ── Feedback ── */
 .feedback-box {
   background: var(--surface);
diff --git a/src/public/index.html b/src/public/index.html
index f0a8699..f6a17e6 100644
--- a/src/public/index.html
+++ b/src/public/index.html
@@ -62,7 +62,7 @@
     <div class="actions">
       <button class="btn" id="skip-btn">Überspringen</button>
       <button class="btn" id="clear-btn">Löschen</button>
-      <button class="btn" id="download-btn" disabled>⬇ Audio</button>
+      <button class="btn btn-download" id="download-btn" disabled>&#11015; Audio</button>
       <button class="btn btn-primary" id="check-btn" disabled>Überprüfen</button>
     </div>
 
diff --git a/src/public/js/app.js b/src/public/js/app.js
index 70a10a4..cd5e28b 100644
--- a/src/public/js/app.js
+++ b/src/public/js/app.js
@@ -253,7 +253,8 @@ downloadBtn.addEventListener('click', () => {
   const topic    = (state.currentTopic?.name || 'antwort').replace(/[^\w]/g, '_');
   const now      = new Date();
   const ext      = EXT_MAP[audioBlob.type.split(';')[0]] || 'webm';
-  const filename = `${topic}_q${state.currentIndex + 1}_${now.getDate()}-${now.getMonth() + 1}.${ext}`;
+  const ms5 = String(Date.now()).slice(-5);
+  const filename = `${topic}_q${state.currentIndex + 1}_${now.getDate()}-${now.getMonth() + 1}_${ms5}.${ext}`;
   const url = URL.createObjectURL(audioBlob);
   const a = document.createElement('a');
   a.href = url; a.download = filename; a.click();