discourse/app/assets/stylesheets/common/base/topic-summary.scss

.topic-map .toggle-summary {
  .summarization-buttons {
    display: flex;
  }

  .ai-summary {
    &__list {
      list-style: none;
      display: flex;
      flex-wrap: wrap;
      padding: 0;
      margin: 0;
      position: relative;
      overflow: hidden;
    }

    &__list-item {
      background: var(--primary-300);
      border-radius: var(--d-border-radius);
      margin-right: 8px;
      margin-bottom: 8px;
      height: 18px;
      display: block;
      animation: motion-up 1.5s infinite linear;

      &:nth-child(1) {
        width: 100%;
      }

      &:nth-child(2) {
        width: 85%;
      }

      &:nth-child(3) {
        width: 90%;
      }

      &:nth-child(4) {
        width: 95%;
      }
    }

    &__shimmer {
      position: absolute;
      top: 0;
      left: 0;
      width: 50%;
      height: 100%;
      background: linear-gradient(
        100deg,
        rgba(255, 255, 255, 0) 20%,
        rgba(255, 255, 255, 0.5) 50%,
        rgba(255, 255, 255, 0) 80%
      );

      animation: ai-shimmer 1.5s infinite linear;
    }

    &__status {
      display: flex;
      align-items: center;
      gap: 0.5rem;
    }

    &__sparkles {
      position: relative;
      width: 30px;
      height: 30px;

      svg {
        margin: 0;
        padding: 0;
        position: absolute;

        path {
          position: absolute;
          transform-origin: center;
          scale: 0.9;
          opacity: 0.5;
          fill: var(--tertiary);
          &:nth-child(1) {
            animation: sparkle 2.25s infinite
              cubic-bezier(0.175, 0.885, 0.32, 1.275);
          }
          &:nth-child(2) {
            animation: sparkle 3.25s infinite
              cubic-bezier(0.175, 0.885, 0.32, 1.275);
          }
          &:nth-child(3) {
            animation: sparkle 4.25s infinite
              cubic-bezier(0.175, 0.885, 0.32, 1.275);
          }
        }
      }
    }
  }

  .placeholder-summary {
    padding-top: 0.5em;
  }

  .placeholder-summary-text {
    display: inline-block;
    height: 1em;
    margin-top: 0.6em;
    width: 100%;
  }

  .summarized-on {
    text-align: right;

    .info-icon {
      margin-left: 3px;
    }
  }

  .outdated-summary {
    color: var(--primary-medium);
  }
}

@keyframes ai-shimmer {
  0% {
    transform: translateX(-200%);
  }
  100% {
    transform: translateX(200%);
  }
}

@keyframes sparkle {
  75% {
    transform: scale(0.9);
    opacity: 0.5;
    fill: var(--tertiary-medium);
  }
  100% {
    transform: scale(1);
    opacity: 1;
    fill: var(--tertiary);
  }
}