github-wide-via-flexbox.css

body .container {
  padding: 0 15px;
}

body .container {
  width: 100%;
}

body .container .repo-container, body .new-issue-form {
  display: flex;
}

body .repository-with-sidebar .repository-sidebar {
  float: none;
  order: 1;
  margin: 0 15px;
}

body .repository-with-sidebar.with-full-navigation .repository-sidebar {
  flex: 0 0 170px;
}

body .container .repo-container .repository-content {
  width: initial;
  flex: 1 1 auto;
  min-width: 0;
}

body .timeline-new-comment {
  max-width: initial;
  width: 95%;
}

body .comment-holder,
body .inline-comments .inline-comment-form,
body .inline-comments .inline-comment-form-container {
  max-width: initial;
}

body .tab-content {
  display: flex;
}

body .discussion-timeline {
  float: none;
  width: initial;
  flex: 1 1 auto;
  min-width: 0;
}

body .discussion-sidebar {
  float: none;
  order: 1;
  flex: 0 0 140px;
  margin: 0 1em;
}

body #discussion_bucket:not(.pull-request-tab-content),
body #discussion_bucket.pull-request-tab-content.is-visible {
  display: flex;
}

/*body .clear-fix {
  content: none;
  display: flex;
}*/

body .comment-body::after, body .new-issue-form::after {
  content: none;
}

body .tab-content.pull-request-tab-content {
  display: none;
}

body .tab-content.pull-request-tab-content.is-visible {
  display: flex;
  flex-wrap: wrap;
}

body .files-bucket.is-stale .stale-files-tab {
  flex: 0 0 100%
}

body .flash {
  position: absolute;
  top: 10px;
  left: 10px;
}