improve landing UI and open-source branding

components/sections/hero.tsx

@@ -1,21 +1,33 @@
-import { Badge } from "@/components/ui/badge";
+import { Github } from "lucide-react";
 
 export function Hero() {
   return (
     <section className="relative pt-10 sm:pt-14">
       <div className="mx-auto max-w-3xl text-center">
-        <Badge
-          variant="outline"
-          className="border-cyan-400/40 bg-cyan-400/10 px-3 py-1 text-cyan-200"
-        >
-          Real-time fiat and crypto conversion
-        </Badge>
+        <div className="mb-4 flex justify-center">
+          <div className="inline-flex items-center gap-2 rounded-full border border-border/70 bg-background/60 px-3 py-1 text-xs text-muted-foreground backdrop-blur">
+            <span className="text-foreground">Open Source</span>
+            <span className="text-muted-foreground/70">•</span>
+            <span className="text-foreground">MIT License</span>
+            <span className="text-muted-foreground/70">•</span>
+            <a
+              href="https://github.com/zvspany/nexcurrency"
+              target="_blank"
+              rel="noreferrer"
+              aria-label="View on GitHub"
+              title="View on GitHub"
+              className="inline-flex items-center text-cyan-200 transition-colors hover:text-cyan-100"
+            >
+              <Github className="h-4 w-4" />
+            </a>
+          </div>
+        </div>
         <h1 className="mt-5 text-balance font-heading text-4xl font-semibold leading-tight tracking-tight text-foreground sm:text-5xl lg:text-6xl">
-          Convert Global Currencies and Crypto in One Premium Workspace
+          Open-source fiat and crypto converter
         </h1>
         <p className="mx-auto mt-4 max-w-2xl text-balance text-base text-muted-foreground sm:text-lg">
-          Instantly switch between fiat and digital assets with live rates, smart
-          formatting, and a clean professional interface built for speed.
+          Convert fiat currencies and cryptocurrencies using live exchange
+          rates.
         </p>
       </div>
     </section>