Add landing tagline: 'Open source is the new state of the art'

index.html

@@ -699,6 +699,7 @@ pre {
   background: linear-gradient(135deg, var(--text) 0%, var(--text-secondary) 100%);
   -webkit-background-clip: text; -webkit-text-fill-color: transparent;
 }
+#landing .tagline { font-size: 22px; font-weight: 600; letter-spacing: -0.3px; color: var(--text); max-width: 560px; line-height: 1.35; margin-top: -8px; }
 #landing .subtitle { color: var(--text-muted); font-size: 17px; max-width: 420px; line-height: 1.5; }
 
 .btn-hf {
@@ -799,6 +800,7 @@ pre {
 <div id="landing">
   <div class="logo-icon" style="width:56px;height:56px;font-size:28px;border-radius:14px">0</div>
   <h1>ZeroLabs</h1>
+  <p class="tagline">Open source is the new state of the art. See for yourself.</p>
   <p class="subtitle">Voice cloning, design, and conversion, audio cleanup, sound effects, and transcription. Powered by open-source models. Generous free tier, then 100x cheaper than proprietary.</p>
   <button class="btn-hf" onclick="login()">🤗 Sign in with Hugging Face</button>
   <p class="landing-note">Uses your HF ZeroGPU quota &middot; Free tier included</p>