--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/hg-web/src/components/header.tsx	Sun Jan 25 20:04:55 2026 -0800
@@ -0,0 +1,60 @@
+import React from 'react';
+
+// Icons
+const ICONS = {
+  repo: "/public/epi_all_colors.svg",
+};
+
+const SunIcon = () => (
+  <svg width="18" height="18" viewBox="0 0 24 24" fill="none" stroke="currentColor" strokeWidth="2" strokeLinecap="round" strokeLinejoin="round">
+    <circle cx="12" cy="12" r="5"/>
+    <line x1="12" y1="1" x2="12" y2="3"/>
+    <line x1="12" y1="21" x2="12" y2="23"/>
+    <line x1="4.22" y1="4.22" x2="5.64" y2="5.64"/>
+    <line x1="18.36" y1="18.36" x2="19.78" y2="19.78"/>
+    <line x1="1" y1="12" x2="3" y2="12"/>
+    <line x1="21" y1="12" x2="23" y2="12"/>
+    <line x1="4.22" y1="19.78" x2="5.64" y2="18.36"/>
+    <line x1="18.36" y1="5.64" x2="19.78" y2="4.22"/>
+  </svg>
+);
+
+const MoonIcon = () => (
+  <svg width="18" height="18" viewBox="0 0 24 24" fill="none" stroke="currentColor" strokeWidth="2" strokeLinecap="round" strokeLinejoin="round">
+    <path d="M21 12.79A9 9 0 1 1 11.21 3 7 7 0 0 0 21 12.79z"/>
+  </svg>
+);
+
+interface HeaderProps {
+  title?: string;
+  subtitle?: string;
+  showThemeToggle?: boolean;
+  isDark?: boolean;
+  onToggleTheme?: () => void;
+}
+
+function Header({
+  title = "Zenbu Repository",
+  subtitle,
+  showThemeToggle = true,
+  isDark = false,
+  onToggleTheme,
+}: HeaderProps) {
+  return (
+    <header className="header">
+      <img src={ICONS.repo} alt="Zenbu" className="header-icon" />
+      <div className="header-content">
+        <h1><a href="/">{title}</a></h1>
+        {subtitle && <p className="header-subtitle">{subtitle}</p>}
+      </div>
+      {showThemeToggle && onToggleTheme && (
+        <button className="theme-toggle" onClick={onToggleTheme} title={isDark ? 'Switch to light mode' : 'Switch to dark mode'}>
+          {isDark ? <SunIcon /> : <MoonIcon />}
+          <span>{isDark ? 'Light' : 'Dark'}</span>
+        </button>
+      )}
+    </header>
+  );
+}
+
+export { Header };