gitlab-org--gitlab-foss/app/assets/stylesheets/framework/timeline.scss

.timeline {
  @include basic-list;
  margin: 0;
  padding: 0;

  .timeline-entry {
    padding: $gl-padding $gl-btn-padding 0;
    border-color: $white-normal;
    color: $gl-text-color;
    border-bottom: 1px solid $border-white-light;

    .timeline-entry-inner {
      position: relative;
    }

    &:target {
      background: $line-target-blue;
    }

    .avatar {
      margin-right: 15px;
    }

    .controls {
      padding-top: 10px;
      float: right;
    }
  }

  .note-text {
    p:last-child {
      margin-bottom: 0;
    }
  }

  .system-note {
    .note-text {
      color: $gl-text-color !important;
    }
  }

  .diff-file {
    border: 1px solid $border-color;
    border-bottom: none;
    margin: 0;
  }
}

@media (max-width: $screen-xs-max) {
  .timeline {
    &::before {
      background: none;
    }

    .timeline-entry .timeline-entry-inner {
      .timeline-icon {
        display: none;
      }

      .timeline-content {
        margin-left: 0;
      }
    }
  }
}

.discussion .timeline-entry {
  margin: 0;
  border-right: none;
}