components/Header.jsx

import React from 'react';
import { Bell, Search, Menu } from 'lucide-react';

export default function Header({ onMenuClick, onThemeToggle, isDark }) {
  return (
    <header className="bg-white dark:bg-dark-surface shadow-sm border-b border-gray-200 dark:border-dark-border z-10 sticky top-0">
      <div className="px-4 sm:px-6 lg:px-8">
        <div className="flex justify-between items-center h-16">
          <div className="flex items-center">
            <button
              type="button"
              className="lg:hidden -ml-2 inline-flex items-center justify-center p-2 rounded-md text-gray-400 hover:text-gray-500 hover:bg-gray-100 focus:outline-none focus:ring-2 focus:ring-inset focus:ring-primary-500 dark:hover:bg-gray-800"
              onClick={onMenuClick}
            >
              <span className="sr-only">Open sidebar</span>
              <Menu className="h-6 w-6" />
            </button>
            
            <div className="hidden lg:block ml-4 lg:ml-0">
              <div className="relative">
                <div className="absolute inset-y-0 left-0 pl-3 flex items-center pointer-events-none">
                  <Search className="h-5 w-5 text-gray-400" />
                </div>
                <input
                  className="block w-full pl-10 pr-3 py-2 border border-gray-300 rounded-md leading-5 bg-gray-50 placeholder-gray-500 focus:outline-none focus:bg-white focus:placeholder-gray-400 focus:ring-1 focus:ring-primary-500 focus:border-primary-500 sm:text-sm dark:bg-gray-800 dark:border-gray-600 dark:text-white dark:placeholder-gray-400 dark:focus:bg-gray-900 transition-colors"
                  placeholder="Search projects, tasks, or team members..."
                  type="search"
                />
              </div>
            </div>
          </div>

          <div className="flex items-center space-x-4">
            <a 
              href="https://huggingface.co/spaces/akhaliq/anycoder" 
              target="_blank" 
              rel="noopener noreferrer"
              className="hidden md:inline-flex items-center px-3 py-1.5 border border-transparent text-xs font-semibold rounded-full text-primary-700 bg-primary-100 hover:bg-primary-200 focus:outline-none focus:ring-2 focus:ring-offset-2 focus:ring-primary-500 dark:bg-primary-900/50 dark:text-primary-300 dark:hover:bg-primary-900 transition-all hover:scale-105"
            >
              Built with anycoder
            </a>

            <button
              onClick={onThemeToggle}
              className="p-2 rounded-full text-gray-400 hover:text-gray-500 hover:bg-gray-100 focus:outline-none focus:ring-2 focus:ring-offset-2 focus:ring-primary-500 dark:hover:text-gray-300 dark:hover:bg-gray-800 transition-colors"
            >
              {isDark ? (
                 <span className="sr-only">Enable light mode</span>
              ) : (
                 <span className="sr-only">Enable dark mode</span>
              )}
              <div className={`w-5 h-5 rounded-full shadow-inner ${isDark ? 'bg-yellow-400' : 'bg-indigo-900'}`}></div>
            </button>

            <button className="p-2 rounded-full text-gray-400 hover:text-gray-500 hover:bg-gray-100 focus:outline-none relative dark:hover:text-gray-300 dark:hover:bg-gray-800 transition-colors">
              <span className="absolute top-1.5 right-1.5 block h-2 w-2 rounded-full bg-red-500 ring-2 ring-white dark:ring-dark-surface animate-pulse"></span>
              <span className="sr-only">View notifications</span>
              <Bell className="h-6 w-6" />
            </button>

            <div className="relative ml-3">
              <button
                type="button"
                className="flex max-w-xs items-center rounded-full bg-white text-sm focus:outline-none focus:ring-2 focus:ring-primary-500 focus:ring-offset-2 dark:bg-dark-surface ring-2 ring-transparent hover:ring-gray-200 dark:hover:ring-gray-600 transition-all"
                id="user-menu-button"
              >
                <span className="sr-only">Open user menu</span>
                <img
                  className="h-8 w-8 rounded-full object-cover"
                  src="https://picsum.photos/seed/user1/200/200"
                  alt=""
                />
              </button>
            </div>
          </div>
        </div>
      </div>
    </header>
  );
}