diff --git a/plugins/techdocs/src/reader/transformers/styles/rules/layout.ts b/plugins/techdocs/src/reader/transformers/styles/rules/layout.ts
new file mode 100644
index 0000000000..2488504dd9
--- /dev/null
+++ b/plugins/techdocs/src/reader/transformers/styles/rules/layout.ts
@@ -0,0 +1,210 @@
+/*
+ * Copyright 2022 The Backstage Authors
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+import { RuleOptions } from './types';
+
+export default ({ theme, sidebar }: RuleOptions) => `
+/*==================  Layout  ==================*/
+
+.md-grid {
+  max-width: 100%;
+  margin: 0;
+}
+
+.md-nav {
+  font-size: calc(var(--md-typeset-font-size) * 0.9);
+}
+.md-nav__link {
+  display: flex;
+  align-items: center;
+  justify-content: space-between;
+}
+.md-nav__icon {
+  height: 20px !important;
+  width: 20px !important;
+  margin-left:${theme.spacing(1)}px;
+}
+.md-nav__icon svg {
+  margin: 0;
+  width: 20px !important;
+  height: 20px !important;
+}
+.md-nav__icon:after {
+  width: 20px !important;
+  height: 20px !important;
+}
+
+.md-main__inner {
+  margin-top: 0;
+}
+
+.md-sidebar {
+  bottom: 75px;
+  position: fixed;
+  width: 16rem;
+  overflow-y: auto;
+  overflow-x: hidden;
+  scrollbar-color: rgb(193, 193, 193) #eee;
+  scrollbar-width: thin;
+}
+.md-sidebar .md-sidebar__scrollwrap {
+  width: calc(16rem - 10px);
+}
+.md-sidebar--secondary {
+  right: ${theme.spacing(3)}px;
+}
+.md-sidebar::-webkit-scrollbar {
+  width: 5px;
+}
+.md-sidebar::-webkit-scrollbar-button {
+  width: 5px;
+  height: 5px;
+}
+.md-sidebar::-webkit-scrollbar-track {
+  background: #eee;
+  border: 1 px solid rgb(250, 250, 250);
+  box-shadow: 0px 0px 3px #dfdfdf inset;
+  border-radius: 3px;
+}
+.md-sidebar::-webkit-scrollbar-thumb {
+  width: 5px;
+  background: rgb(193, 193, 193);
+  border: transparent;
+  border-radius: 3px;
+}
+.md-sidebar::-webkit-scrollbar-thumb:hover {
+  background: rgb(125, 125, 125);
+}
+
+.md-content {
+  max-width: calc(100% - 16rem * 2);
+  margin-left: 16rem;
+  margin-bottom: 50px;
+}
+
+.md-footer {
+  position: fixed;
+  bottom: 0px;
+}
+.md-footer__title {
+  background-color: unset;
+}
+.md-footer-nav__link {
+  width: 16rem;
+}
+
+.md-dialog {
+  background-color: unset;
+}
+
+@media screen and (min-width: 76.25em) {
+  .md-sidebar {
+    height: auto;
+  }
+}
+
+@media screen and (max-width: 76.1875em) {
+  .md-nav {
+    transition: none !important;
+    background-color: var(--md-default-bg-color)
+  }
+  .md-nav--primary .md-nav__title {
+    cursor: auto;
+    color: var(--md-default-fg-color);
+    font-weight: 700;
+    white-space: normal;
+    line-height: 1rem;
+    height: auto;
+    display: flex;
+    flex-flow: column;
+    row-gap: 1.6rem;
+    padding: 1.2rem .8rem .8rem;
+    background-color: var(--md-default-bg-color);
+  }
+  .md-nav--primary .md-nav__title~.md-nav__list {
+    box-shadow: none;
+  }
+  .md-nav--primary .md-nav__title ~ .md-nav__list > :first-child {
+    border-top: none;
+  }
+  .md-nav--primary .md-nav__title .md-nav__button {
+    display: none;
+  }
+  .md-nav--primary .md-nav__title .md-nav__icon {
+    color: var(--md-default-fg-color);
+    position: static;
+    height: auto;
+    margin: 0 0 0 -0.2rem;
+  }
+  .md-nav--primary > .md-nav__title [for="none"] {
+    padding-top: 0;
+  }
+  .md-nav--primary .md-nav__item {
+    border-top: none;
+  }
+  .md-nav--primary :is(.md-nav__title,.md-nav__item) {
+    font-size : var(--md-typeset-font-size);
+  }
+  .md-nav .md-source {
+    display: none;
+  }
+
+  .md-sidebar {
+    height: 100%;
+  }
+  .md-sidebar--primary {
+    width: 12.1rem !important;
+    z-index: 200;
+    left: ${
+      sidebar.isPinned ? 'calc(-12.1rem + 242px)' : 'calc(-12.1rem + 72px)'
+    } !important;
+  }
+  .md-sidebar--secondary:not([hidden]) {
+    display: none;
+  }
+
+  .md-content {
+    max-width: 100%;
+    margin-left: 0;
+  }
+
+  .md-header__button {
+    margin: 0.4rem 0;
+    margin-left: 0.4rem;
+    padding: 0;
+  }
+
+  .md-overlay {
+    left: 0;
+  }
+
+  .md-footer {
+    position: static;
+    padding-left: 0;
+  }
+  .md-footer-nav__link {
+    /* footer links begin to overlap at small sizes without setting width */
+    width: 50%;
+  }
+}
+
+@media screen and (max-width: 600px) {
+  .md-sidebar--primary {
+    left: -12.1rem !important;
+    width: 12.1rem;
+  }
+}
+`;