metamask-extension/ui/app/components/transaction-activity-log/index.scss

.transaction-activity-log {
  &__card {
    background: $white;
    height: 100%;
  }

  &__activities-container {
    padding-top: 8px;
  }

  &__activity {
    padding: 4px 0;
    display: flex;
    flex-direction: row;
    align-items: center;
    position: relative;

    &::after {
      content: '';
      position: absolute;
      left: 0;
      top: 0;
      height: 100%;
      width: 6px;
      border-right: 1px solid $scorpion;
    }

    &:first-child::after {
      height: 50%;
      top: 50%;
    }

    &:last-child::after {
      height: 50%;
    }
  }

  &__activity-icon {
    width: 13px;
    height: 13px;
    margin-right: 6px;
    border-radius: 50%;
    background: $scorpion;
    flex: 0 0 auto;
  }

  &__activity-text {
    color: $scorpion;
    font-size: .75rem;
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
  }

  &__value {
    display: inline;
    font-weight: 500;
  }

  b {
    font-weight: 500;
  }
}