Enable MergeableSelector in scss-lint

34 files changed, 666 insertions, 555 deletions

diff --git a/.scss-lint.yml b/.scss-lint.yml
index d2c972fa9c4..16a168b7c60 100644
--- a/.scss-lint.yml
+++ b/.scss-lint.yml
@@ -112,7 +112,7 @@ linters:
 
   # Reports when you define the same selector twice in a single sheet.
   MergeableSelector:
-    enabled: false
+    enabled: true
 
   # Functions, mixins, variables, and placeholders should be declared
   # with all lowercase letters and hyphens instead of underscores.
diff --git a/app/assets/stylesheets/framework/blocks.scss b/app/assets/stylesheets/framework/blocks.scss
index 8819a0c20f4..def986180fc 100644
--- a/app/assets/stylesheets/framework/blocks.scss
+++ b/app/assets/stylesheets/framework/blocks.scss
@@ -40,6 +40,10 @@
 
   &.top-block {
     border-top: none;
+
+    .container-fluid {
+      background-color: inherit;
+    }
   }
 
   &.middle-block {
@@ -98,10 +102,6 @@
     background-color: $white-light;
     border-top: none;
   }
-
-  &.top-block .container-fluid {
-    background-color: inherit;
-  }
 }
 
 .sub-header-block {
diff --git a/app/assets/stylesheets/framework/callout.scss b/app/assets/stylesheets/framework/callout.scss
index e0e46dd73af..1bd94c0acba 100644
--- a/app/assets/stylesheets/framework/callout.scss
+++ b/app/assets/stylesheets/framework/callout.scss
@@ -12,15 +12,15 @@
   border-left: 3px solid $border-color;
   color: $text-color;
   background: $gray-light;
-}
 
-.bs-callout h4 {
-  margin-top: 0;
-  margin-bottom: 5px;
-}
+  h4 {
+    margin-top: 0;
+    margin-bottom: 5px;
+  }
 
-.bs-callout p:last-child {
-  margin-bottom: 0;
+  p:last-child {
+    margin-bottom: 0;
+  }
 }
 
 /* Variations */
diff --git a/app/assets/stylesheets/framework/common.scss b/app/assets/stylesheets/framework/common.scss
index ed84b17af6a..ea3007f5e08 100644
--- a/app/assets/stylesheets/framework/common.scss
+++ b/app/assets/stylesheets/framework/common.scss
@@ -53,6 +53,14 @@ hr {
 
 .str-truncated {
   @include str-truncated;
+
+  &-60 {
+    @include str-truncated(60%);
+  }
+
+  &-100 {
+    @include str-truncated(100%);
+  }
 }
 
 .block-truncated {
@@ -78,10 +86,17 @@ hr {
   font-size: 14px;
 }
 
-table a code {
-  position: relative;
-  top: -2px;
-  margin-right: 3px;
+table {
+  a code {
+    position: relative;
+    top: -2px;
+    margin-right: 3px;
+  }
+
+  td.permission-x {
+    background: $table-permission-x-bg !important;
+    text-align: center;
+  }
 }
 
 .loading {
@@ -266,13 +281,6 @@ img.emoji {
   margin-bottom: 10px;
 }
 
-table {
-  td.permission-x {
-    background: $table-permission-x-bg !important;
-    text-align: center;
-  }
-}
-
 .btn-sign-in {
   text-shadow: none;
 
@@ -338,10 +346,11 @@ table {
 
 .dropzone .dz-preview .dz-progress {
   border-color: $border-color !important;
-}
 
-.dropzone .dz-preview .dz-progress .dz-upload {
-  background: $gl-success !important;
+  .dz-upload {
+    background: $gl-success !important;
+  }
+
 }
 
 .dz-message {
@@ -402,16 +411,6 @@ table {
   border-radius: $border-radius-default;
 }
 
-.str-truncated {
-  &-60 {
-    @include str-truncated(60%);
-  }
-
-  &-100 {
-    @include str-truncated(100%);
-  }
-}
-
 .tooltip {
   .tooltip-inner {
     word-wrap: break-word;
diff --git a/app/assets/stylesheets/framework/contextual-sidebar.scss b/app/assets/stylesheets/framework/contextual-sidebar.scss
index fa5d3833f3e..94a39baa4a6 100644
--- a/app/assets/stylesheets/framework/contextual-sidebar.scss
+++ b/app/assets/stylesheets/framework/contextual-sidebar.scss
@@ -141,15 +141,15 @@
     svg {
       fill: $gl-text-color-secondary;
     }
-  }
 
-  .nav-item-name {
-    flex: 1;
-  }
+    .nav-item-name {
+      flex: 1;
+    }
 
-  li.active {
-    > a {
-      font-weight: $gl-font-weight-bold;
+    &.active {
+      > a {
+        font-weight: $gl-font-weight-bold;
+      }
     }
   }
 
diff --git a/app/assets/stylesheets/framework/dropdowns.scss b/app/assets/stylesheets/framework/dropdowns.scss
index 1aa53b8f8cf..bd63d84f2e6 100644
--- a/app/assets/stylesheets/framework/dropdowns.scss
+++ b/app/assets/stylesheets/framework/dropdowns.scss
@@ -727,11 +727,11 @@
 
 .pika-single.animate-picker.is-bound {
   @include set-visible;
-}
 
-.pika-single.animate-picker.is-bound.is-hidden {
-  @include set-invisible;
-  overflow: hidden;
+  &.is-hidden {
+    @include set-invisible;
+    overflow: hidden;
+  }
 }
 
 @mixin dropdown-item-hover {
diff --git a/app/assets/stylesheets/framework/files.scss b/app/assets/stylesheets/framework/files.scss
index 5833ef939e9..6382551fcc9 100644
--- a/app/assets/stylesheets/framework/files.scss
+++ b/app/assets/stylesheets/framework/files.scss
@@ -165,22 +165,36 @@
         &:last-child {
           border-right: none;
         }
-      }
 
-      td.blame-commit {
-        padding: 5px 10px;
-        min-width: 400px;
-        max-width: 400px;
-        background: $gray-light;
-        border-left: 3px solid;
+        &.blame-commit {
+          padding: 5px 10px;
+          min-width: 400px;
+          max-width: 400px;
+          background: $gray-light;
+          border-left: 3px solid;
+
+          .commit-row-title {
+            display: flex;
+          }
+
+          .item-title {
+            flex: 1;
+            margin-right: 0.5em;
+          }
+        }
+
+        &.line-numbers {
+          float: none;
+          border-left: 1px solid $blame-line-numbers-border;
 
-        .commit-row-title {
-          display: flex;
+          i {
+            float: none;
+            margin-right: 0;
+          }
         }
 
-        .item-title {
-          flex: 1;
-          margin-right: 0.5em;
+        &.lines {
+          padding: 0;
         }
       }
 
@@ -195,20 +209,6 @@
           border-left-color: mix($blame-gray, $blame-cyan, $i / 4.0 * 100%);
         }
       }
-
-      td.line-numbers {
-        float: none;
-        border-left: 1px solid $blame-line-numbers-border;
-
-        i {
-          float: none;
-          margin-right: 0;
-        }
-      }
-
-      td.lines {
-        padding: 0;
-      }
     }
 
     &.logs {
diff --git a/app/assets/stylesheets/framework/filters.scss b/app/assets/stylesheets/framework/filters.scss
index 0d80a85d521..dbe5067fcf5 100644
--- a/app/assets/stylesheets/framework/filters.scss
+++ b/app/assets/stylesheets/framework/filters.scss
@@ -469,10 +469,10 @@
       word-break: break-all;
     }
   }
-}
 
-.filter-dropdown-item.droplab-item-active .btn {
-  @extend %filter-dropdown-item-btn-hover;
+  &.droplab-item-active .btn {
+    @extend %filter-dropdown-item-btn-hover;
+  }
 }
 
 .filter-dropdown-loading {
diff --git a/app/assets/stylesheets/framework/header.scss b/app/assets/stylesheets/framework/header.scss
index 62ba74ff582..ce5a277aad4 100644
--- a/app/assets/stylesheets/framework/header.scss
+++ b/app/assets/stylesheets/framework/header.scss
@@ -352,7 +352,81 @@
 
 .header-user .dropdown-menu-nav,
 .header-new .dropdown-menu-nav {
-  margin-top: $dropdown-vertical-offset;
+  margin-top: 4px;
+}
+
+.search {
+  margin: 4px 8px 0;
+
+  form {
+    height: 32px;
+    border: 0;
+    border-radius: $border-radius-default;
+    transition: border-color ease-in-out 0.15s, background-color ease-in-out 0.15s;
+
+    &:hover {
+      box-shadow: none;
+    }
+  }
+
+  &.search-active form {
+    box-shadow: none;
+
+    .search-input {
+      color: $gl-text-color;
+      transition: color ease-in-out 0.15s;
+    }
+
+    .search-input::placeholder {
+      color: $gl-text-color-tertiary;
+    }
+
+    .search-input-wrap {
+      .search-icon,
+      .clear-icon {
+        color: $gl-text-color-tertiary;
+        transition: color ease-in-out 0.15s;
+      }
+    }
+  }
+
+  .search-input {
+    color: $white-light;
+    background: none;
+    transition: color ease-in-out 0.15s;
+  }
+
+  .search-input::placeholder {
+    transition: color ease-in-out 0.15s;
+  }
+
+  .location-badge {
+    font-size: 12px;
+    margin: -4px 4px -4px -4px;
+    line-height: 25px;
+    padding: 4px 8px;
+    border-radius: 2px 0 0 2px;
+    height: 32px;
+    transition: border-color ease-in-out 0.15s;
+  }
+
+  &.search-active {
+    form {
+      background-color: rgba($indigo-200, .3);
+      box-shadow: none;
+    }
+
+    .location-badge {
+      background-color: $nav-badge-bg;
+      border-color: $border-color;
+    }
+
+    .search-input-wrap {
+      .clear-icon {
+        color: $white-light;
+      }
+    }
+  }
 }
 
 .breadcrumbs {
diff --git a/app/assets/stylesheets/framework/layout.scss b/app/assets/stylesheets/framework/layout.scss
index 69d19ea2962..cb324ccc440 100644
--- a/app/assets/stylesheets/framework/layout.scss
+++ b/app/assets/stylesheets/framework/layout.scss
@@ -30,10 +30,10 @@ body {
 .container {
   padding-top: 0;
   z-index: 5;
-}
 
-.container .content {
-  margin: 0;
+  .content {
+    margin: 0;
+  }
 }
 
 .navless-container {
@@ -82,26 +82,26 @@ body {
     transition: background-color 0.15s, border-color 0.15s;
     background-color: $orange-500;
     border-color: $orange-500;
-  }
 
-  .alert-warning + .alert-warning {
-    background-color: $orange-600;
-    border-color: $orange-600;
-  }
+    &:only-of-type {
+      background-color: $orange-500;
+      border-color: $orange-500;
+    }
 
-  .alert-warning + .alert-warning + .alert-warning {
-    background-color: $orange-700;
-    border-color: $orange-700;
-  }
+    + .alert-warning {
+      background-color: $orange-600;
+      border-color: $orange-600;
 
-  .alert-warning + .alert-warning + .alert-warning + .alert-warning {
-    background-color: $orange-800;
-    border-color: $orange-800;
-  }
+      + .alert-warning {
+        background-color: $orange-700;
+        border-color: $orange-700;
 
-  .alert-warning:only-of-type {
-    background-color: $orange-500;
-    border-color: $orange-500;
+        + .alert-warning {
+          background-color: $orange-800;
+          border-color: $orange-800;
+        }
+      }
+    }
   }
 }
 
diff --git a/app/assets/stylesheets/framework/markdown_area.scss b/app/assets/stylesheets/framework/markdown_area.scss
index e3920b5d3d9..0a5a16c09b0 100644
--- a/app/assets/stylesheets/framework/markdown_area.scss
+++ b/app/assets/stylesheets/framework/markdown_area.scss
@@ -173,21 +173,8 @@
   ul > li {
     white-space: nowrap;
   }
-}
-
-@media(max-width: $screen-xs-max) {
-  .atwho-view-ul {
-    width: 350px;
-  }
-
-  .atwho-view ul li {
-    overflow: hidden;
-    text-overflow: ellipsis;
-  }
-}
 
-// TODO: fallback to global style
-.atwho-view {
+  // TODO: fallback to global style
   .atwho-view-ul {
     padding: 8px 1px;
 
@@ -220,3 +207,14 @@
     }
   }
 }
+
+@media(max-width: $screen-xs-max) {
+  .atwho-view-ul {
+    width: 350px;
+  }
+
+  .atwho-view ul li {
+    overflow: hidden;
+    text-overflow: ellipsis;
+  }
+}
diff --git a/app/assets/stylesheets/framework/secondary-navigation-elements.scss b/app/assets/stylesheets/framework/secondary-navigation-elements.scss
index 3fd2549b143..9e1f77e5726 100644
--- a/app/assets/stylesheets/framework/secondary-navigation-elements.scss
+++ b/app/assets/stylesheets/framework/secondary-navigation-elements.scss
@@ -340,11 +340,64 @@
   }
 }
 
-.project-item-select-holder.btn-group {
-  display: flex;
-  max-width: 350px;
-  overflow: hidden;
-  float: right;
+.page-with-layout-nav {
+  .right-sidebar {
+    top: ($header-height + 1) * 2;
+  }
+
+  &.page-with-sub-nav {
+    .right-sidebar {
+      top: ($header-height + 1) * 3;
+
+      &.affix {
+        top: $header-height;
+      }
+    }
+  }
+}
+
+.with-performance-bar .page-with-layout-nav {
+  .right-sidebar {
+    top: ($header-height + 1) * 2 + $performance-bar-height;
+  }
+
+  &.page-with-sub-nav {
+    .right-sidebar {
+      top: ($header-height + 1) * 3 + $performance-bar-height;
+
+      &.affix {
+        top: $header-height + $performance-bar-height;
+      }
+    }
+  }
+}
+
+@media (max-width: $screen-xs-max) {
+  .top-area {
+    flex-flow: row wrap;
+
+    .nav-controls {
+      $controls-margin: $btn-xs-side-margin - 2px;
+      flex: 0 0 100%;
+
+      &.controls-flex {
+        display: flex;
+        flex-flow: row wrap;
+        align-items: center;
+        justify-content: center;
+        padding: 0 0 $gl-padding-top;
+      }
+
+      .controls-item,
+      .controls-item-full,
+      .controls-item:last-child {
+        flex: 1 1 35%;
+        display: block;
+        width: 100%;
+        margin: $controls-margin;
+      }
+    }
+  }
 
   .new-project-item-link {
     white-space: nowrap;
diff --git a/app/assets/stylesheets/framework/selects.scss b/app/assets/stylesheets/framework/selects.scss
index 621eec4f158..aa35cd9bea4 100644
--- a/app/assets/stylesheets/framework/selects.scss
+++ b/app/assets/stylesheets/framework/selects.scss
@@ -60,22 +60,12 @@
   border-radius: $border-radius-base;
   border: 1px solid $dropdown-border-color;
   min-width: 175px;
-  color: $gl-text-color;
-  z-index: 999;
+  color: $gl-grayish-blue;
 }
 
-.select2-drop-mask {
-  z-index: 998;
-}
-
-.select2-drop.select2-drop-above.select2-drop-active {
-  border-top: 1px solid $dropdown-border-color;
-  margin-top: -6px;
-}
-
-.select2-results li.select2-result-with-children > .select2-result-label {
-  font-weight: $gl-font-weight-bold;
-  color: $gl-text-color;
+.select2-results .select2-result-label,
+.select2-more-results {
+  padding: 10px 15px;
 }
 
 .select2-container-active {
@@ -144,58 +134,46 @@
   .select2-drop-auto-width & {
     padding: 15px 15px 5px;
   }
-}
 
-.select2-search input {
-  padding: 2px 25px 2px 5px;
-  background: $white-light image-url('select2.png');
-  background-repeat: no-repeat;
-  background-position: right 0 bottom 6px;
-  border: 1px solid $input-border;
-  border-radius: $border-radius-default;
-  transition: border-color ease-in-out 0.15s, box-shadow ease-in-out 0.15s;
-
-  &:focus {
-    border-color: $input-border-focus;
+  input {
+    padding: 2px 25px 2px 5px;
+    background: $white-light image-url('select2.png');
+    background-repeat: no-repeat;
+    background-position: right 0 bottom 6px;
+    border: 1px solid $input-border;
+    border-radius: $border-radius-default;
+    transition: border-color ease-in-out 0.15s, box-shadow ease-in-out 0.15s;
+
+    &:focus {
+      border-color: $input-border-focus;
+    }
+
+    &.select2-active {
+      background-color: $white-light;
+      background-image: image-url('select2-spinner.gif') !important;
+      background-repeat: no-repeat;
+      background-position: right 5px center !important;
+      background-size: 16px 16px !important;
+    }
   }
 }
 
-.select2-search input.select2-active {
-  background-color: $white-light;
-  background-image: image-url('select2-spinner.gif') !important;
-  background-repeat: no-repeat;
-  background-position: right 5px center !important;
-  background-size: 16px 16px !important;
+.select2-results .select2-no-results,
+.select2-results .select2-searching,
+.select2-results .select2-ajax-error,
+.select2-results .select2-selection-limit {
+  background: $gray-light;
+  display: list-item;
+  padding: 10px 15px;
 }
 
 .select2-results {
   margin: 0;
-  padding: #{$gl-padding / 2} 0;
-
-  .select2-no-results,
-  .select2-searching,
-  .select2-ajax-error,
-  .select2-selection-limit {
-    background: transparent;
-    padding: #{$gl-padding / 2} $gl-padding;
-  }
-
-  .select2-result-label,
-  .select2-more-results {
-    padding: #{$gl-padding / 2} $gl-padding;
-  }
+  padding: 10px 0;
 
-  .select2-highlighted {
-    background: transparent;
+  li.select2-result-with-children > .select2-result-label {
+    font-weight: $gl-font-weight-bold;
     color: $gl-text-color;
-
-    .select2-result-label {
-      background: $dropdown-item-hover-bg;
-    }
-  }
-
-  .select2-result {
-    padding: 0 1px;
   }
 }
 
@@ -212,6 +190,8 @@
 }
 
 .select2-highlighted {
+  background: $gl-link-color !important;
+
   .group-result {
     .group-path {
       color: $white-light;
diff --git a/app/assets/stylesheets/highlight/white.scss b/app/assets/stylesheets/highlight/white.scss
index 65b140cd7f8..c3d8f0c61a2 100644
--- a/app/assets/stylesheets/highlight/white.scss
+++ b/app/assets/stylesheets/highlight/white.scss
@@ -217,13 +217,31 @@ $white-gc-bg: #eaf2f5;
   .cp { color: $white-cp; font-weight: $gl-font-weight-bold; }
   .c1 { color: $white-c1; font-style: italic; }
   .cs { color: $white-cs; font-weight: $gl-font-weight-bold; font-style: italic; }
-  .gd { color: $white-gd; background-color: $white-gd-bg; }
-  .gd .x { color: $white-gd-x; background-color: $white-gd-x-bg; }
+
+  .gd {
+    color: $white-gd;
+    background-color: $white-gd-bg;
+
+    .x {
+      color: $white-gd-x;
+      background-color: $white-gd-x-bg;
+    }
+  }
+
   .ge { font-style: italic; }
   .gr { color: $white-gr; }
   .gh { color: $white-gh; }
-  .gi { color: $white-gi; background-color: $white-gi-bg; }
-  .gi .x { color: $white-gi-x; background-color: $white-gi-x-bg; }
+
+  .gi {
+    color: $white-gi;
+    background-color: $white-gi-bg;
+
+    .x {
+      color: $white-gi-x;
+      background-color: $white-gi-x-bg;
+    }
+  }
+
   .go { color: $white-go; }
   .gp { color: $white-gp; }
   .gs { font-weight: $gl-font-weight-bold; }
diff --git a/app/assets/stylesheets/mailers/highlighted_diff_email.scss b/app/assets/stylesheets/mailers/highlighted_diff_email.scss
index fbe538ad1d7..658ac26fca9 100644
--- a/app/assets/stylesheets/mailers/highlighted_diff_email.scss
+++ b/app/assets/stylesheets/mailers/highlighted_diff_email.scss
@@ -158,13 +158,31 @@ span.highlight_word {
 .cp { color: $highlighted-cp; font-weight: $gl-font-weight-bold; }
 .c1 { color: $highlighted-c1; font-style: italic; }
 .cs { color: $highlighted-cs; font-weight: $gl-font-weight-bold; font-style: italic; }
-.gd { color: $highlighted-gd; background-color: $highlighted-gd-bg; }
-.gd .x { color: $highlighted-gd; background-color: $highlighted-gd-x-bg; }
+
+.gd {
+  color: $highlighted-gd;
+  background-color: $highlighted-gd-bg;
+
+  .x {
+    color: $highlighted-gd;
+    background-color: $highlighted-gd-x-bg;
+  }
+}
+
 .ge { font-style: italic; }
 .gr { color: $highlighted-gr; }
 .gh { color: $highlighted-gh; }
-.gi { color: $highlighted-gi; background-color: $highlighted-gi-bg; }
-.gi .x { color: $highlighted-gi; background-color: $highlighted-gi-x-bg; }
+
+.gi {
+  color: $highlighted-gi;
+  background-color: $highlighted-gi-bg;
+
+  .x {
+    color: $highlighted-gi;
+    background-color: $highlighted-gi-x-bg;
+  }
+}
+
 .go { color: $highlighted-go; }
 .gp { color: $highlighted-gp; }
 .gs { font-weight: $gl-font-weight-bold; }
diff --git a/app/assets/stylesheets/pages/builds.scss b/app/assets/stylesheets/pages/builds.scss
index e87ffe4f374..46978be8ba0 100644
--- a/app/assets/stylesheets/pages/builds.scss
+++ b/app/assets/stylesheets/pages/builds.scss
@@ -68,18 +68,18 @@
 
     &.affix {
       top: $header-height;
-    }
 
-    // with sidebar
-    &.affix.sidebar-expanded {
-      right: 306px;
-      left: 16px;
-    }
+      // with sidebar
+      &.sidebar-expanded {
+        right: 306px;
+        left: 16px;
+      }
 
-    // without sidebar
-    &.affix.sidebar-collapsed {
-      right: 16px;
-      left: 16px;
+      // without sidebar
+      &.sidebar-collapsed {
+        right: 16px;
+        left: 16px;
+      }
     }
 
     &.affix-top {
diff --git a/app/assets/stylesheets/pages/cycle_analytics.scss b/app/assets/stylesheets/pages/cycle_analytics.scss
index 2a92673d9fa..82d9be29201 100644
--- a/app/assets/stylesheets/pages/cycle_analytics.scss
+++ b/app/assets/stylesheets/pages/cycle_analytics.scss
@@ -22,6 +22,11 @@
         }
       }
     }
+
+    svg {
+      width: 136px;
+      height: 136px;
+    }
   }
 
   .col-headers {
@@ -155,11 +160,6 @@
     }
   }
 
-  .landing svg {
-    width: 136px;
-    height: 136px;
-  }
-
   .fa-spinner {
     font-size: 28px;
     position: relative;
diff --git a/app/assets/stylesheets/pages/diff.scss b/app/assets/stylesheets/pages/diff.scss
index 09f831dcb29..faa3d1fb4d5 100644
--- a/app/assets/stylesheets/pages/diff.scss
+++ b/app/assets/stylesheets/pages/diff.scss
@@ -380,6 +380,10 @@
       }
     }
   }
+
+  .line_content {
+    white-space: pre-wrap;
+  }
 }
 
 .file-content .diff-file {
@@ -387,10 +391,6 @@
   border: none;
 }
 
-.diff-file .line_content {
-  white-space: pre-wrap;
-}
-
 .diff-wrap-lines .line_content {
   white-space: pre-wrap;
 }
diff --git a/app/assets/stylesheets/pages/environments.scss b/app/assets/stylesheets/pages/environments.scss
index 6c1d32bed2f..b5b0f3d9dfa 100644
--- a/app/assets/stylesheets/pages/environments.scss
+++ b/app/assets/stylesheets/pages/environments.scss
@@ -255,23 +255,6 @@
   width: 100%;
   padding: 0;
   padding-bottom: 100%;
-}
-
-.prometheus-svg-container > svg {
-  position: absolute;
-  height: 100%;
-  width: 100%;
-  left: 0;
-  top: 0;
-
-  text {
-    fill: $gl-text-color;
-    stroke-width: 0;
-  }
-
-  .text-metric-bold {
-    font-weight: $gl-font-weight-bold;
-  }
 
   .label-axis-text {
     fill: $black;
@@ -286,42 +269,51 @@
     font-size: 12px;
   }
 
-  .legend-axis-text {
-    fill: $black;
-  }
+  > svg {
+    position: absolute;
+    height: 100%;
+    width: 100%;
+    left: 0;
+    top: 0;
 
-  .tick {
-    > line {
-      stroke: $gray-darker;
+    .label-axis-text,
+    .text-metric-usage {
+      fill: $black;
+      font-weight: $gl-font-weight-normal;
+      font-size: 12px;
     }
 
-    > text {
-      font-size: 12px;
+    .legend-axis-text {
+      fill: $black;
     }
-  }
 
-  .text-metric-title {
-    font-size: 12px;
-  }
+    .tick > text {
+      font-size: 12px;
+    }
 
-  .y-label-text,
-  .x-label-text {
-    fill: $gray-darkest;
-  }
+    .text-metric-title {
+      font-size: 12px;
+    }
 
-  .axis-tick {
-    stroke: $gray-darker;
-  }
+    .y-label-text,
+    .x-label-text {
+      fill: $gray-darkest;
+    }
 
-  @media (max-width: $screen-sm-max) {
-    .label-axis-text,
-    .text-metric-usage,
-    .legend-axis-text {
-      font-size: 8px;
+    .axis-tick {
+      stroke: $gray-darker;
     }
 
-    .tick > text {
-      font-size: 8px;
+    @media (max-width: $screen-sm-max) {
+      .label-axis-text,
+      .text-metric-usage,
+      .legend-axis-text {
+        font-size: 8px;
+      }
+
+      .tick > text {
+        font-size: 8px;
+      }
     }
   }
 }
diff --git a/app/assets/stylesheets/pages/issuable.scss b/app/assets/stylesheets/pages/issuable.scss
index 88600a0e6d3..7059a4cfe85 100644
--- a/app/assets/stylesheets/pages/issuable.scss
+++ b/app/assets/stylesheets/pages/issuable.scss
@@ -127,7 +127,16 @@
 }
 
 .right-sidebar {
-  a:not(.btn-retry),
+  position: absolute;
+  top: $header-height;
+  bottom: 0;
+  right: 0;
+  transition: width .3s;
+  background: $gray-light;
+  z-index: 200;
+  overflow: hidden;
+
+  a,
   .btn-link {
     color: inherit;
   }
@@ -228,17 +237,6 @@
   .btn-clipboard:hover {
     color: $gl-text-color;
   }
-}
-
-.right-sidebar {
-  position: absolute;
-  top: $header-height;
-  bottom: 0;
-  right: 0;
-  transition: width $right-sidebar-transition-duration;
-  background: $gray-light;
-  z-index: 200;
-  overflow: hidden;
 
   .issuable-sidebar {
     width: calc(100% + 100px);
diff --git a/app/assets/stylesheets/pages/login.scss b/app/assets/stylesheets/pages/login.scss
index cf5f933a762..92d49bd864a 100644
--- a/app/assets/stylesheets/pages/login.scss
+++ b/app/assets/stylesheets/pages/login.scss
@@ -109,6 +109,30 @@
     border-top-right-radius: $border-radius-default;
     border-top-left-radius: $border-radius-default;
 
+    // Ldap configurations may need more tabs & the tab labels are user generated (arbitrarily long).
+    // These styles prevent this from breaking the layout, and only applied when providers are configured.
+    &.custom-provider-tabs {
+      flex-wrap: wrap;
+
+      li {
+        min-width: 85px;
+        flex-basis: auto;
+
+        // This styles tab elements that have wrapped to a second line. We cannot easily predict when this will happen.
+        // We are making somewhat of an assumption about the configuration here: that users do not have more than
+        // 3 LDAP servers configured (in addition to standard login) and they are not using especially long names for any
+        // of them. If either condition is false, this will work as expected. If both are true, there may be a missing border
+        // above one of the bottom row elements. If you know a better way, please implement it!
+        &:nth-child(n+5) {
+          border-top: 1px solid $border-color;
+        }
+      }
+
+      a {
+        font-size: 16px;
+      }
+    }
+
     li {
       flex: 1;
       text-align: center;
@@ -154,32 +178,6 @@
     }
   }
 
-  // Ldap configurations may need more tabs & the tab labels are user generated (arbitrarily long).
-  // These styles prevent this from breaking the layout, and only applied when providers are configured.
-
-  .new-session-tabs.custom-provider-tabs {
-    flex-wrap: wrap;
-
-    li {
-      min-width: 85px;
-      flex-basis: auto;
-
-      // This styles tab elements that have wrapped to a second line. We cannot easily predict when this will happen.
-      // We are making somewhat of an assumption about the configuration here: that users do not have more than
-      // 3 LDAP servers configured (in addition to standard login) and they are not using especially long names for any
-      // of them. If either condition is false, this will work as expected. If both are true, there may be a missing border
-      // above one of the bottom row elements. If you know a better way, please implement it!
-      &:nth-child(n+5) {
-        border-top: 1px solid $border-color;
-      }
-    }
-
-    a {
-      font-size: 16px;
-    }
-  }
-
-
   .form-control {
     &:active,
     &:focus {
@@ -231,35 +229,35 @@
   margin: 0;
   padding: 0;
   height: 100%;
-}
 
-// Fixes footer container to bottom of viewport
-.devise-layout-html body {
-  // offset height of fixed header + 1 to avoid scroll
-  height: calc(100% - 51px);
-  margin: 0;
-  padding: 0;
+  // Fixes footer container to bottom of viewport
+  body {
+    // offset height of fixed header + 1 to avoid scroll
+    height: calc(100% - 51px);
+    margin: 0;
+    padding: 0;
 
-  .page-wrap {
-    min-height: 100%;
-    position: relative;
-  }
+    .page-wrap {
+      min-height: 100%;
+      position: relative;
+    }
 
-  .footer-container,
-  hr.footer-fixed {
-    position: absolute;
-    bottom: 0;
-    left: 0;
-    right: 0;
-    height: 40px;
-    background: $white-light;
-  }
+    .footer-container,
+    hr.footer-fixed {
+      position: absolute;
+      bottom: 0;
+      left: 0;
+      right: 0;
+      height: 40px;
+      background: $white-light;
+    }
 
-  .navless-container {
-    padding: 65px 15px; // height of footer + bottom padding of email confirmation link
+    .navless-container {
+      padding: 65px 15px; // height of footer + bottom padding of email confirmation link
 
-    @media (max-width: $screen-xs-max) {
-      padding: 0 15px 65px;
+      @media (max-width: $screen-xs-max) {
+        padding: 0 15px 65px;
+      }
     }
   }
 }
diff --git a/app/assets/stylesheets/pages/members.scss b/app/assets/stylesheets/pages/members.scss
index 692acf74a58..8099113750a 100644
--- a/app/assets/stylesheets/pages/members.scss
+++ b/app/assets/stylesheets/pages/members.scss
@@ -49,6 +49,12 @@
       width: auto;
     }
   }
+
+  &.existing-title {
+    @media (min-width: $screen-sm-min) {
+      float: left;
+    }
+  }
 }
 
 .member-form-control {
@@ -64,12 +70,6 @@
   line-height: 43px;
 }
 
-.member.existing-title {
-  @media (min-width: $screen-sm-min) {
-    float: left;
-  }
-}
-
 .member-search-form {
   @include new-style-dropdown;
 
diff --git a/app/assets/stylesheets/pages/merge_requests.scss b/app/assets/stylesheets/pages/merge_requests.scss
index 645fc1f3ebb..6e485ebad1b 100644
--- a/app/assets/stylesheets/pages/merge_requests.scss
+++ b/app/assets/stylesheets/pages/merge_requests.scss
@@ -156,6 +156,10 @@
     &.media > *:first-child {
       margin-right: 10px;
     }
+
+    .approve-btn {
+      margin-right: 5px;
+    }
   }
 
   .mr-widget-pipeline-graph {
@@ -191,6 +195,10 @@
     overflow: hidden;
     word-break: break-all;
 
+    &.media > *:first-child {
+      margin-right: 10px;
+    }
+
     &.label-truncated {
       position: relative;
       display: inline-block;
@@ -208,14 +216,7 @@
         background-color: $gray-light;
       }
     }
-  }
 
-  .mr-widget-help {
-    padding: 10px 16px 10px 48px;
-    font-style: italic;
-  }
-
-  .mr-widget-body {
     h4 {
       float: left;
       font-weight: $gl-font-weight-bold;
@@ -238,6 +239,10 @@
       margin-right: 7px;
     }
 
+    .approve-btn {
+      margin-right: 5px;
+    }
+
     label {
       font-weight: $gl-font-weight-normal;
     }
@@ -337,6 +342,22 @@
     }
   }
 
+  .mini-pipeline-graph-dropdown-menu .mini-pipeline-graph-dropdown-item {
+    display: flex;
+    align-items: center;
+
+    .ci-status-text,
+    .ci-status-icon {
+      top: 0;
+      margin-right: 10px;
+    }
+  }
+
+  .mr-widget-help {
+    padding: 10px 16px 10px 48px;
+    font-style: italic;
+  }
+
   .ci-coverage {
     float: right;
   }
@@ -351,12 +372,6 @@
   }
 }
 
-.mr-state-widget .mr-widget-body {
-  .approve-btn {
-    margin-right: 5px;
-  }
-}
-
 .mr-widget-body-controls {
   flex-wrap: wrap;
 }
@@ -470,16 +485,16 @@
       padding-bottom: 0;
     }
   }
-}
 
-.mr-info-list.mr-memory-usage {
-  p {
-    float: left;
-  }
+  &.mr-memory-usage {
+    p {
+      float: left;
+    }
 
-  .memory-graph-container {
-    float: left;
-    margin-left: 5px;
+    .memory-graph-container {
+      float: left;
+      margin-left: 5px;
+    }
   }
 }
 
diff --git a/app/assets/stylesheets/pages/milestone.scss b/app/assets/stylesheets/pages/milestone.scss
index 32039936be7..ae8fa45a2d7 100644
--- a/app/assets/stylesheets/pages/milestone.scss
+++ b/app/assets/stylesheets/pages/milestone.scss
@@ -66,6 +66,15 @@
       height: 6px;
       margin: 0;
     }
+
+    .sidebar-collapsed-icon {
+      clear: both;
+      padding: 15px 5px 5px;
+
+      .progress {
+        margin: 5px 0;
+      }
+    }
   }
 
   .collapsed-milestone-date {
@@ -93,17 +102,6 @@
     margin-right: 0;
   }
 
-  .milestone-progress {
-    .sidebar-collapsed-icon {
-      clear: both;
-      padding: 15px 5px 5px;
-
-      .progress {
-        margin: 5px 0;
-      }
-    }
-  }
-
   .right-sidebar-collapsed & {
     .reference {
       border-top: 1px solid $border-gray-normal;
@@ -156,18 +154,16 @@
 
   .status-box {
     margin-top: 0;
-  }
-
-  .milestone-buttons {
-    margin-left: auto;
-  }
-
-  .status-box {
     order: 1;
   }
 
   .milestone-buttons {
+    margin-left: auto;
     order: 2;
+
+    .verbose {
+      display: none;
+    }
   }
 
   .header-text-content {
@@ -175,10 +171,6 @@
     width: 100%;
   }
 
-  .milestone-buttons .verbose {
-    display: none;
-  }
-
   @media (min-width: $screen-xs-min) {
     .milestone-buttons .verbose {
       display: inline;
diff --git a/app/assets/stylesheets/pages/note_form.scss b/app/assets/stylesheets/pages/note_form.scss
index f0cad30f4f3..5127307c5e7 100644
--- a/app/assets/stylesheets/pages/note_form.scss
+++ b/app/assets/stylesheets/pages/note_form.scss
@@ -111,24 +111,9 @@
   margin: auto;
   align-items: center;
 
-  .icon {
-    margin-right: $issuable-warning-icon-margin;
-  }
-}
-
-.disabled-comment .issuable-note-warning {
-  border: none;
-  border-radius: $label-border-radius;
-  padding-top: $gl-vert-padding;
-  padding-bottom: $gl-vert-padding;
-
-  .icon svg {
-    position: relative;
-    top: 2px;
-    margin-right: $btn-xs-side-margin;
-    width: $gl-font-size;
-    height: $gl-font-size;
-    fill: $orange-600;
+  + .md-area {
+    border-top-left-radius: 0;
+    border-top-right-radius: 0;
   }
 }
 
@@ -155,11 +140,6 @@
   }
 }
 
-.issuable-note-warning + .md-area {
-  border-top-left-radius: 0;
-  border-top-right-radius: 0;
-}
-
 .discussion-form {
   background-color: $white-light;
 }
diff --git a/app/assets/stylesheets/pages/notes.scss b/app/assets/stylesheets/pages/notes.scss
index 312917bd13a..3c88bfc6b4d 100644
--- a/app/assets/stylesheets/pages/notes.scss
+++ b/app/assets/stylesheets/pages/notes.scss
@@ -312,57 +312,72 @@ ul.notes {
   }
 }
 
-.diff-file .notes_holder {
-  font-family: $regular_font;
+.diff-file {
+  .is-over {
+    .add-diff-note {
+      display: inline-block;
+    }
+  }
 
-  td {
-    border: 1px solid $white-normal;
-    border-left: none;
+  // Merge request notes in diffs
+  // Diff is inline
+  .notes_content .note-header .note-headline-light {
+    display: inline-block;
+    position: relative;
+  }
 
-    &.notes_line {
-      vertical-align: middle;
-      text-align: center;
-      padding: 10px 0;
-      background: $gray-light;
-      color: $text-color;
-    }
+  .notes_holder {
+    font-family: $regular_font;
 
-    &.notes_line2 {
-      text-align: center;
-      padding: 10px 0;
-      border-left: 1px solid $note-line2-border !important;
-    }
+    td {
+      border: 1px solid $white-normal;
+      border-left: none;
 
-    &.notes_content {
-      background-color: $gray-light;
-      border-width: 1px 0;
-      padding: 0;
-      vertical-align: top;
-      white-space: normal;
+      &.notes_line {
+        vertical-align: middle;
+        text-align: center;
+        padding: 10px 0;
+        background: $gray-light;
+        color: $text-color;
+      }
 
-      &.parallel {
-        border-width: 1px;
+      &.notes_line2 {
+        text-align: center;
+        padding: 10px 0;
+        border-left: 1px solid $note-line2-border !important;
       }
 
-      .discussion-notes {
-        &:not(:first-child) {
-          border-top: 1px solid $white-normal;
-          margin-top: 20px;
+      &.notes_content {
+        background-color: $gray-light;
+        border-width: 1px 0;
+        padding: 0;
+        vertical-align: top;
+        white-space: normal;
+
+        &.parallel {
+          border-width: 1px;
         }
 
-        &:not(:last-child) {
-          border-bottom: 1px solid $white-normal;
-          margin-bottom: 20px;
+        .discussion-notes {
+          &:not(:first-child) {
+            border-top: 1px solid $white-normal;
+            margin-top: 20px;
+          }
+
+          &:not(:last-child) {
+            border-bottom: 1px solid $white-normal;
+            margin-bottom: 20px;
+          }
         }
-      }
 
-      .notes {
-        background-color: $white-light;
-      }
+        .notes {
+          background-color: $white-light;
+        }
 
-      a code {
-        top: 0;
-        margin-right: 0;
+        a code {
+          top: 0;
+          margin-right: 0;
+        }
       }
     }
   }
@@ -457,8 +472,9 @@ ul.notes {
   margin-left: 10px;
   color: $gray-darkest;
 
-  .btn-group > .discussion-next-btn {
-    margin-left: -1px;
+  @include notes-media('max', $screen-md-max) {
+    float: none;
+    margin-left: 0;
   }
 }
 
@@ -502,13 +518,6 @@ ul.notes {
   min-width: 180px;
 }
 
-.discussion-actions {
-  @include notes-media('max', $screen-md-max) {
-    float: none;
-    margin-left: 0;
-  }
-}
-
 .note-actions-item {
   margin-left: 12px;
   display: flex;
@@ -665,14 +674,6 @@ ul.notes {
   }
 }
 
-.diff-file {
-  .is-over {
-    .add-diff-note {
-      display: inline-block;
-    }
-  }
-}
-
 .disabled-comment {
   background-color: $gray-light;
   border-radius: $border-radius-base;
@@ -801,12 +802,3 @@ ul.notes {
 .line-resolve-text {
   vertical-align: middle;
 }
-
-// Merge request notes in diffs
-.diff-file {
-  // Diff is inline
-  .notes_content .note-header .note-headline-light {
-    display: inline-block;
-    position: relative;
-  }
-}
diff --git a/app/assets/stylesheets/pages/pipelines.scss b/app/assets/stylesheets/pages/pipelines.scss
index 6604b471560..09d5a4248b3 100644
--- a/app/assets/stylesheets/pages/pipelines.scss
+++ b/app/assets/stylesheets/pages/pipelines.scss
@@ -175,6 +175,25 @@
     }
   }
 
+  /**
+   * Play button with icon in dropdowns
+   */
+  .no-btn {
+    border: none;
+    background: none;
+    outline: none;
+    width: 100%;
+    text-align: left;
+
+    .icon-play {
+      position: relative;
+      top: 2px;
+      margin-right: 5px;
+      height: 13px;
+      width: 12px;
+    }
+  }
+
   .duration,
   .finished-at {
     color: $gl-text-color-secondary;
@@ -450,48 +469,40 @@
       @extend .build-content:hover;
     }
 
-    // Action Icons in big pipeline-graph nodes
-    .ci-action-icon-container.ci-action-icon-wrapper {
-      height: 30px;
-      width: 30px;
-      background: $white-light;
-      border: 1px solid $border-color;
-      border-radius: 100%;
-      display: block;
+    .ci-action-icon-container {
+      position: absolute;
+      right: 5px;
+      top: 5px;
 
-      &:hover {
-        background-color: $stage-hover-bg;
-        border: 1px solid $dropdown-toggle-active-border-color;
-      }
+      // Action Icons in big pipeline-graph nodes
+      .ci-action-icon-wrapper {
+        height: 30px;
+        width: 30px;
+        background: $white-light;
+        border: 1px solid $border-color;
+        border-radius: 100%;
+        display: block;
 
-      svg {
-        fill: $gl-text-color-secondary;
-        position: relative;
-        left: 5px;
-        top: 2px;
-        width: 18px;
-        height: 18px;
-      }
+        &:hover {
+          background-color: $stage-hover-bg;
+          border: 1px solid $dropdown-toggle-active-border-color;
 
-      &.play {
-        svg {
-          width: #{$ci-action-icon-size - 8};
-          height: #{$ci-action-icon-size - 8};
-          left: 8px;
+          svg {
+            fill: $gl-text-color;
+          }
         }
-      }
 
-      &:hover svg {
-        fill: $gl-text-color;
+        svg {
+          fill: $gl-text-color-secondary;
+          position: relative;
+          left: 5px;
+          top: 2px;
+          width: 18px;
+          height: 18px;
+        }
       }
     }
 
-    .ci-action-icon-container {
-      position: absolute;
-      right: 5px;
-      top: 5px;
-    }
-
     .ci-status-icon svg {
       height: 20px;
       width: 20px;
@@ -840,13 +851,16 @@ button.mini-pipeline-graph-dropdown-toggle {
   left: 100%;
   top: -10px;
   box-shadow: 0 1px 5px $black-transparent;
-}
 
-/**
- * Top arrow in the dropdown in the big pipeline graph
- */
-.big-pipeline-graph-dropdown-menu {
+  .mini-pipeline-graph-dropdown-item {
+    .ci-status-icon {
+      top: -1px;
+    }
+  }
 
+  /**
+   * Top arrow in the dropdown in the big pipeline graph
+   */
   &::before,
   &::after {
     content: '';
@@ -908,22 +922,23 @@ button.mini-pipeline-graph-dropdown-toggle {
     margin-top: 1px;
     border-bottom-color: $white-light;
   }
-}
 
-/**
- * Center dropdown menu in mini graph
- */
-.mini-pipeline-graph-dropdown-menu.dropdown-menu {
-  transform: translate(-80%, 0);
-  min-width: 150px;
+  /**
+   * Center dropdown menu in mini graph
+   */
+  &.dropdown-menu {
+    transform: translate(-80%, 0);
+    min-width: 150px;
 
-  @media(min-width: $screen-md-min) {
-    transform: translate(-50%, 0);
-    right: auto;
-    left: 50%;
-    min-width: 240px;
+    @media(min-width: $screen-md-min) {
+      transform: translate(-50%, 0);
+      right: auto;
+      left: 50%;
+      min-width: 240px;
+    }
   }
 }
+
 /**
  * Terminal
  */
@@ -947,25 +962,6 @@ button.mini-pipeline-graph-dropdown-toggle {
   }
 }
 
-/**
- * Play button with icon in dropdowns
- */
-.ci-table .no-btn {
-  border: none;
-  background: none;
-  outline: none;
-  width: 100%;
-  text-align: left;
-
-  .icon-play {
-    position: relative;
-    top: 2px;
-    margin-right: 5px;
-    height: 13px;
-    width: 12px;
-  }
-}
-
 .ci-header-container {
   min-height: 55px;
 
diff --git a/app/assets/stylesheets/pages/projects.scss b/app/assets/stylesheets/pages/projects.scss
index bd385db9692..818386f42a6 100644
--- a/app/assets/stylesheets/pages/projects.scss
+++ b/app/assets/stylesheets/pages/projects.scss
@@ -778,35 +778,35 @@ a.deploy-project-label {
   .nav {
     padding-top: 12px;
     padding-bottom: 12px;
-  }
 
-  .nav > li {
-    display: inline-block;
+    > li {
+      display: inline-block;
 
-    &:not(:last-child) {
-      margin-right: $gl-padding;
-    }
+      &:not(:last-child) {
+        margin-right: $gl-padding;
+      }
 
-    &.right {
-      vertical-align: top;
-      margin-top: 0;
+      &.right {
+        vertical-align: top;
+        margin-top: 0;
 
-      @media (min-width: $screen-lg-min) {
-        float: right;
+        @media (min-width: $screen-lg-min) {
+          float: right;
+        }
       }
-    }
-  }
 
-  .nav > li > a {
-    padding: 0;
-    background-color: transparent;
-    font-size: 14px;
-    line-height: 29px;
-    color: $notes-light-color;
+      > a {
+        padding: 0;
+        background-color: transparent;
+        font-size: 14px;
+        line-height: 29px;
+        color: $notes-light-color;
 
-    &:hover,
-    &:focus {
-      color: $gl-text-color;
+        &:hover,
+        &:focus {
+          color: $gl-text-color;
+        }
+      }
     }
   }
 
diff --git a/app/assets/stylesheets/pages/search.scss b/app/assets/stylesheets/pages/search.scss
index db0a04a5eb3..eed711b1b66 100644
--- a/app/assets/stylesheets/pages/search.scss
+++ b/app/assets/stylesheets/pages/search.scss
@@ -78,6 +78,10 @@ input[type="checkbox"]:hover {
   }
 
   .search-input-wrap {
+    // Fallback if flexbox is not supported
+    display: inline-block;
+    width: 100%;
+
     .search-icon,
     .clear-icon {
       position: absolute;
diff --git a/app/assets/stylesheets/pages/settings.scss b/app/assets/stylesheets/pages/settings.scss
index 968a94c68cf..8b9b47a41bc 100644
--- a/app/assets/stylesheets/pages/settings.scss
+++ b/app/assets/stylesheets/pages/settings.scss
@@ -241,11 +241,11 @@
         margin-left: 5px;
         background: $badge-bg;
       }
-    }
 
-    /* Ensure we don't add border if there's only single li */
-    li + li {
-      border-top: 1px solid $border-color;
+      /* Ensure we don't add border if there's only single li */
+      + li {
+        border-top: 1px solid $border-color;
+      }
     }
   }
 }
diff --git a/app/assets/stylesheets/pages/sherlock.scss b/app/assets/stylesheets/pages/sherlock.scss
index bfe065dbbaf..2bf0bedb1f5 100644
--- a/app/assets/stylesheets/pages/sherlock.scss
+++ b/app/assets/stylesheets/pages/sherlock.scss
@@ -5,10 +5,10 @@ table .sherlock-code {
 .sherlock-code {
   pre {
     word-wrap: normal;
-  }
 
-  pre code {
-    white-space: pre;
+    code {
+      white-space: pre;
+    }
   }
 }
 
@@ -21,13 +21,13 @@ table .sherlock-code {
     text-align: right;
     padding: 0 10px !important;
   }
+
+  .slow {
+    color: $red-500;
+    font-weight: $gl-font-weight-bold;
+  }
 }
 
 .sherlock-file-sample pre {
   padding-top: 28px !important;
 }
-
-.sherlock-line-samples-table .slow {
-  color: $red-500;
-  font-weight: $gl-font-weight-bold;
-}
diff --git a/app/assets/stylesheets/pages/stat_graph.scss b/app/assets/stylesheets/pages/stat_graph.scss
index dfa4d033fb8..cede147d559 100644
--- a/app/assets/stylesheets/pages/stat_graph.scss
+++ b/app/assets/stylesheets/pages/stat_graph.scss
@@ -40,16 +40,16 @@
     @media (max-width: $screen-xs-max) {
       width: 100%;
     }
-  }
 
-  .person .spark {
-    display: block;
-    background: $stat-graph-common-bg;
-    width: 100%;
-  }
+    .spark {
+      display: block;
+      background: $stat-graph-common-bg;
+      width: 100%;
+    }
 
-  .person .area-contributor {
-    fill: $stat-graph-orange-fill;
+    .area-contributor {
+      fill: $stat-graph-orange-fill;
+    }
   }
 }
 
diff --git a/app/assets/stylesheets/pages/wiki.scss b/app/assets/stylesheets/pages/wiki.scss
index b7d4e7bf582..e150f96f3fa 100644
--- a/app/assets/stylesheets/pages/wiki.scss
+++ b/app/assets/stylesheets/pages/wiki.scss
@@ -161,10 +161,10 @@ ul.wiki-pages-list.content-list {
     list-style: none;
     margin-left: 0;
     padding-left: 15px;
-  }
 
-  ul li {
-    padding: 5px 0;
+    li {
+      padding: 5px 0;
+    }
   }
 }
 
diff --git a/changelogs/unreleased/enable-scss-lint-mergeable-selector.yml b/changelogs/unreleased/enable-scss-lint-mergeable-selector.yml
new file mode 100644
index 00000000000..5f6e0cafe88
--- /dev/null
+++ b/changelogs/unreleased/enable-scss-lint-mergeable-selector.yml
@@ -0,0 +1,4 @@
+---
+title: Enable MergeableSelector in scss-lint
+merge_request: 12810
+author: Takuya Noguchi