discourse-ai/assets/stylesheets/modules/summarization/desktop/ai-summary.scss

.topic-map {
  .ai-summarization-button {
    .fk-d-menu {
      position: fixed;
      top: calc(var(--header-offset) + 1rem) !important;
      left: unset !important;
      right: 1rem !important;
      width: 470px;
      max-width: 470px !important; //overruling JS
      max-height: calc(
        100vh - var(--header-offset) - 3rem - var(--composer-height, 0px)
      );

      .ai-summary__header,
      .ai-summary-box {
        padding: 0.75em 1rem;
        box-sizing: border-box;
      }

      .ai-summary {
        &__header {
          position: sticky;
          top: 0;
          display: flex;
          justify-content: space-between;
          align-items: center;
          padding-block: 0.5rem;
          padding-right: 0.5rem;
          background: var(--secondary);
          border-bottom: 1px solid var(--primary-low);

          h3 {
            margin: 0;
          }
        }
      }
    }
  }
}