frontend/src/components/shared/Header.tsx

import { useNavigate } from 'react-router-dom';

export default function Header() {
  const navigate = useNavigate();

  return (
    <header className="border-b border-gray-200 bg-white" data-testid="header">
      <div className="mx-auto max-w-7xl px-4 py-3 flex items-center gap-3">
        <button
          onClick={() => navigate('/')}
          className="flex items-center gap-2 text-xl font-medium text-gray-900 hover:opacity-80 cursor-pointer"
          data-testid="logo"
        >
          <svg width="24" height="24" viewBox="0 0 24 24" fill="none" className="text-[#1a73e8]">
            <path d="M21 16v-2l-8-5V3.5c0-.83-.67-1.5-1.5-1.5S10 2.67 10 3.5V9l-8 5v2l8-2.5V19l-2 1.5V22l3.5-1 3.5 1v-1.5L13 19v-5.5l8 2.5z" fill="currentColor"/>
          </svg>
          Flights
        </button>
      </div>
    </header>
  );
}