frontend/src/components/ErrorBanner.jsx

export default function ErrorBanner({ message, onDismiss }) {
  if (!message) return null;
  return (
    <div
      role="alert"
      className="flex items-start gap-3 rounded-xl border border-red-500/30 bg-red-500/10 px-4 py-3"
    >
      <svg
        viewBox="0 0 24 24"
        className="w-5 h-5 text-red-400 shrink-0 mt-0.5"
        fill="none"
        stroke="currentColor"
        strokeWidth="2"
        strokeLinecap="round"
        strokeLinejoin="round"
      >
        <circle cx="12" cy="12" r="10" />
        <line x1="12" y1="8" x2="12" y2="12" />
        <line x1="12" y1="16" x2="12.01" y2="16" />
      </svg>
      <div className="flex-1 min-w-0">
        <p className="text-sm text-red-100 font-medium">Something went wrong</p>
        <p className="text-sm text-red-200/80 mt-0.5 break-words">{message}</p>
      </div>
      {onDismiss && (
        <button
          type="button"
          onClick={onDismiss}
          className="text-red-200/60 hover:text-red-100 transition-colors"
          aria-label="Dismiss error"
        >
          <svg
            viewBox="0 0 24 24"
            className="w-4 h-4"
            fill="none"
            stroke="currentColor"
            strokeWidth="2"
            strokeLinecap="round"
            strokeLinejoin="round"
          >
            <line x1="18" y1="6" x2="6" y2="18" />
            <line x1="6" y1="6" x2="18" y2="18" />
          </svg>
        </button>
      )}
    </div>
  );
}