From 69cc1db574e319c77d5ae049979a6b35518b26fe Mon Sep 17 00:00:00 2001
From: Yuval Adam <_@yuv.al>
Date: Thu, 22 May 2025 13:00:55 +0200
Subject: Add subnet guide, layout, nav and embed

---
 src/components/Navigation.tsx | 103 ++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 103 insertions(+)
 create mode 100644 src/components/Navigation.tsx

(limited to 'src/components')

diff --git a/src/components/Navigation.tsx b/src/components/Navigation.tsx
new file mode 100644
index 0000000..b5ef2a7
--- /dev/null
+++ b/src/components/Navigation.tsx
@@ -0,0 +1,103 @@
+import { useState, useEffect } from 'react';
+
+export default function Navigation() {
+  const [isMenuOpen, setIsMenuOpen] = useState(false);
+
+  // Close menu when window is resized to desktop size
+  useEffect(() => {
+    const handleResize = () => {
+      if (window.innerWidth >= 640 && isMenuOpen) {
+        setIsMenuOpen(false);
+      }
+    };
+
+    window.addEventListener('resize', handleResize);
+    return () => window.removeEventListener('resize', handleResize);
+  }, [isMenuOpen]);
+
+  const toggleMenu = () => {
+    setIsMenuOpen(!isMenuOpen);
+  };
+
+  return (
+    <nav className="w-full max-w-6xl mx-auto mb-4 py-2 px-4">
+      <div className="flex justify-between items-center">
+        <a
+          href="/"
+          className="text-2xl font-bold flex items-center gap-2"
+        >
+          <img
+            src="/ico/icon-192.png"
+            alt="CIDR.xyz logo"
+            className="w-6 h-6"
+          />
+          CIDR.xyz
+        </a>
+
+        {/* Hamburger button for mobile */}
+        <button
+          onClick={toggleMenu}
+          className="sm:hidden flex items-center px-3 py-2 border rounded text-gray-700 border-gray-700 hover:text-blue-600 hover:border-blue-600"
+          aria-label="Toggle menu"
+        >
+          <svg className="fill-current h-4 w-4" viewBox="0 0 20 20" xmlns="http://www.w3.org/2000/svg">
+            <path d="M0 3h20v2H0V3zm0 6h20v2H0V9zm0 6h20v2H0v-2z" />
+          </svg>
+        </button>
+
+        {/* Desktop menu */}
+        <div className="hidden sm:flex space-x-6">
+          <NavLinks />
+        </div>
+      </div>
+
+      {/* Mobile menu */}
+      <div className={`${isMenuOpen ? '' : 'hidden'} sm:hidden mt-4 pt-4 border-t border-gray-200`}>
+        <div className="flex flex-col space-y-3">
+          <NavLinks mobile={true} />
+        </div>
+      </div>
+    </nav>
+  );
+}
+
+// Separated NavLinks component for reuse
+function NavLinks({ mobile = false }: { mobile?: boolean }) {
+  const linkClass = `text-gray-700 hover:text-blue-600 font-medium ${mobile ? 'py-2' : ''}`;
+
+  return (
+    <>
+      <a href="/" className={linkClass}>
+        CIDR Calculator
+      </a>
+      <a href="/subnet-guide" className={linkClass}>
+        Subnet Guide
+      </a>
+      <a href="/embed-example" className={linkClass}>
+        Embed
+      </a>
+      <a
+        href="https://github.com/yuvadm/cidr.xyz"
+        className={`${linkClass} flex items-center gap-1`}
+        target="_blank"
+        rel="noopener noreferrer"
+      >
+        Github
+        <svg
+          xmlns="http://www.w3.org/2000/svg"
+          className="h-4 w-4"
+          fill="none"
+          viewBox="0 0 24 24"
+          stroke="currentColor"
+        >
+          <path
+            strokeLinecap="round"
+            strokeLinejoin="round"
+            strokeWidth="2"
+            d="M10 6H6a2 2 0 00-2 2v10a2 2 0 002 2h10a2 2 0 002-2v-4M14 4h6m0 0v6m0-6L10 14"
+          />
+        </svg>
+      </a>
+    </>
+  );
+}
-- 
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