Add styles for Projects Dropdown

app/assets/stylesheets/framework/dropdowns.scss

@@ -822,3 +822,152 @@
 }
 @include new-style-dropdown('.js-namespace-select + ');
+
+header.navbar-gitlab-new .header-content .dropdown-menu.projects-dropdown-menu {
+  padding: 0;
+
+  @media (max-width: $screen-xs-max) {
+    display: table;
+    left: -50px;
+    min-width: 300px;
+  }
+}
+
+.projects-dropdown-container {
+  display: flex;
+  flex-direction: row;
+  width: 500px;
+  height: 334px;
+
+  .project-dropdown-sidebar,
+  .project-dropdown-content {
+    padding: 8px 0;
+  }
+
+  .loading-animation {
+    color: $almost-black;
+  }
+
+  .project-dropdown-sidebar {
+    width: 30%;
+    border-right: 1px solid $border-color;
+  }
+
+  .project-dropdown-content {
+    position: relative;
+    width: 70%;
+  }
+
+  @media (max-width: $screen-xs-max) {
+    flex-direction: column;
+    width: 100%;
+    height: auto;
+    flex: 1;
+
+    .project-dropdown-sidebar,
+    .project-dropdown-content {
+      width: 100%;
+    }
+
+    .project-dropdown-sidebar {
+      border-bottom: 1px solid $border-color;
+      border-right: 0;
+    }
+  }
+}
+
+.projects-dropdown-container {
+  .projects-list-frequent-container,
+  .projects-list-search-container, {
+    padding: 8px 0;
+    overflow-y: auto;
+  }
+
+  .section-header,
+  .projects-list-frequent-container li.section-empty,
+  .projects-list-search-container li.section-empty {
+    padding: 0 15px;
+  }
+
+  .section-header,
+  .projects-list-frequent-container li.section-empty,
+  .projects-list-search-container li.section-empty {
+    color: $gl-text-color-secondary;
+    font-size: $gl-font-size;
+  }
+
+  .projects-list-frequent-container,
+  .projects-list-search-container {
+    li.section-empty.section-failure {
+      color: $callout-danger-color;
+    }
+  }
+
+  .search-input-container {
+    position: relative;
+    padding: 4px $gl-padding;
+
+    .search-icon {
+      position: absolute;
+      top: 13px;
+      right: 25px;
+      color: $md-area-border;
+    }
+  }
+
+  .section-header {
+    font-weight: 700;
+    margin-top: 8px;
+  }
+
+  .projects-list-search-container {
+    height: 284px;
+  }
+
+  @media (max-width: $screen-xs-max) {
+    .projects-list-frequent-container {
+      width: auto;
+      height: auto;
+      padding-bottom: 0;
+    }
+  }
+}
+
+.projects-list-item-container {
+  .project-item-avatar-container
+  .project-item-metadata-container {
+    float: left;
+  }
+
+  .project-title,
+  .project-namespace {
+    max-width: 250px;
+    overflow: hidden;
+    text-overflow: ellipsis;
+  }
+
+  &:hover {
+    .project-item-avatar-container .avatar {
+      border-color: $md-area-border;
+    }
+  }
+
+  .project-title {
+    font-size: $gl-font-size;
+    font-weight: 400;
+    line-height: 16px;
+  }
+
+  .project-namespace {
+    margin-top: 4px;
+    font-size: 12px;
+    line-height: 12px;
+    color: $gl-text-color-secondary;
+  }
+
+  @media (max-width: $screen-xs-max) {
+    .project-item-metadata-container {
+      float: none;
+    }
+  }
+}