.insertion-space { position: relative; }
      .insertion-space::after {
        content: "";
        position: absolute;
        left: 50%;
        top: 0.12em;
        bottom: 0.08em;
        width: 1px;
        background: currentColor;
        opacity: 0;
      }
      .descriptor.is-editing .insertion-space::after {
        opacity: 1;
        animation: cursor-blink 1s step-end infinite;
      }
      @keyframes cursor-blink { 50% { opacity: 0; } }
      @media (prefers-reduced-motion: reduce) {
        .insertion-space::after { display: none; animation: none; }
      }