cosmo/frontend/src/components/Header.tsx

/**
 * Header component - simple branding
 */
export function Header({ selectedBodyName, bodyCount }: { selectedBodyName?: string, bodyCount: number }) {
  return (
    <header className="absolute top-0 left-0 right-0 z-50 pointer-events-none">
      <div className="px-6 py-4 bg-gradient-to-b from-black/90 via-black/60 to-transparent">
        <div className="flex items-center gap-4 pointer-events-auto inline-flex">
          <div className="flex items-center gap-3">
            <div className="w-10 h-10 rounded-full bg-gradient-to-br from-blue-500 to-purple-600 flex items-center justify-center shadow-lg shadow-blue-500/30">
              <span className="text-2xl">🌌</span>
            </div>
            <div>
              <h1 className="text-2xl font-bold text-white tracking-tight drop-shadow-md">Cosmo</h1>
              <p className="text-xs text-gray-400 font-medium tracking-wide">DEEP SPACE EXPLORER</p>
            </div>
          </div>

          {/* Status Info */}
          <div className="ml-4 px-3 py-1 bg-white/10 backdrop-blur-md rounded-full border border-white/10">
            <p className="text-xs text-gray-300">
              {selectedBodyName ? (
                <>
                  <span className="text-cyan-400 animate-pulse">●</span> 聚焦: <span className="text-white font-bold ml-1">{selectedBodyName}</span>
                </>
              ) : (
                <>
                  <span className="text-green-400">●</span> {bodyCount} 个天体在线
                </>
              )}
            </p>
          </div>
        </div>
      </div>
    </header>
  );
}