diff --git a/doc/doxygen/Doxylocal b/doc/doxygen/Doxylocal
index 7671fc91cd1ff95889510da2943ea21550d858eb..0ceb9882278f18fa64fc08400829a9efe9f40725 100644
--- a/doc/doxygen/Doxylocal
+++ b/doc/doxygen/Doxylocal
@@ -2,7 +2,7 @@
# please us '+=' to add file/directories to the lists
PROJECT_NAME = "DuMuX"
-PROJECT_BRIEF = "DUNE for Multi-{Phase, Component, Scale, Physics, Domain, ...} flow and transport in porous media"
+PROJECT_BRIEF = "Flow and transport in porous media"
PROJECT_LOGO = @top_srcdir@/doc/logo/dumux_logo_small.png
PROJECT_NUMBER = @DUNE_MOD_VERSION@
@@ -29,6 +29,8 @@ HTML_EXTRA_FILES = @srcdir@/doxygen-awesome-darkmode-toggle.js \
@srcdir@/doxygen-awesome-interactive-toc.js \
HTML_EXTRA_STYLESHEET = @srcdir@/doxygen-awesome.css \
+ @srcdir@/doxygen-awesome-sidebar-only.css \
+ @srcdir@/doxygen-awesome-sidebar-only-darkmode-toggle.css \
@srcdir@/custom.css
HTML_FILE_EXTENSION = .html
@@ -58,6 +60,7 @@ SHORT_NAMES = NO
# Settings required for doxygen-awesome theme
GENERATE_TREEVIEW = YES
+TREEVIEW_WIDTH = 420
DISABLE_INDEX = NO
FULL_SIDEBAR = NO
HTML_COLORSTYLE = LIGHT # required with Doxygen >= 1.9.5
diff --git a/doc/doxygen/doxygen-awesome-sidebar-only-darkmode-toggle.css b/doc/doxygen/doxygen-awesome-sidebar-only-darkmode-toggle.css
new file mode 100644
index 0000000000000000000000000000000000000000..d207446e0be8ca2f2129dc03e556f2678bf0abc8
--- /dev/null
+++ b/doc/doxygen/doxygen-awesome-sidebar-only-darkmode-toggle.css
@@ -0,0 +1,40 @@
+
+/**
+
+Doxygen Awesome
+https://github.com/jothepro/doxygen-awesome-css
+
+MIT License
+
+Copyright (c) 2021 - 2023 jothepro
+
+Permission is hereby granted, free of charge, to any person obtaining a copy
+of this software and associated documentation files (the "Software"), to deal
+in the Software without restriction, including without limitation the rights
+to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+copies of the Software, and to permit persons to whom the Software is
+furnished to do so, subject to the following conditions:
+
+The above copyright notice and this permission notice shall be included in all
+copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+SOFTWARE.
+
+*/
+
+@media screen and (min-width: 768px) {
+
+ #MSearchBox {
+ width: calc(var(--side-nav-fixed-width) - calc(2 * var(--spacing-medium)) - var(--searchbar-height) - 1px);
+ }
+
+ #MSearchField {
+ width: calc(var(--side-nav-fixed-width) - calc(2 * var(--spacing-medium)) - 66px - var(--searchbar-height));
+ }
+}
diff --git a/doc/doxygen/doxygen-awesome-sidebar-only.css b/doc/doxygen/doxygen-awesome-sidebar-only.css
new file mode 100644
index 0000000000000000000000000000000000000000..f616dcc563cd03f43042561221d46750d21e1e97
--- /dev/null
+++ b/doc/doxygen/doxygen-awesome-sidebar-only.css
@@ -0,0 +1,115 @@
+/**
+
+Doxygen Awesome
+https://github.com/jothepro/doxygen-awesome-css
+
+MIT License
+
+Copyright (c) 2021 - 2023 jothepro
+
+Permission is hereby granted, free of charge, to any person obtaining a copy
+of this software and associated documentation files (the "Software"), to deal
+in the Software without restriction, including without limitation the rights
+to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+copies of the Software, and to permit persons to whom the Software is
+furnished to do so, subject to the following conditions:
+
+The above copyright notice and this permission notice shall be included in all
+copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+SOFTWARE.
+
+ */
+
+html {
+ /* side nav width. MUST be = `TREEVIEW_WIDTH`.
+ * Make sure it is wide enough to contain the page title (logo + title + version)
+ */
+ --side-nav-fixed-width: 420px;
+ --menu-display: none;
+
+ --top-height: 120px;
+ --toc-sticky-top: -25px;
+ --toc-max-height: calc(100vh - 2 * var(--spacing-medium) - 25px);
+}
+
+#projectname {
+ white-space: nowrap;
+}
+
+
+@media screen and (min-width: 768px) {
+ html {
+ --searchbar-background: var(--page-background-color);
+ }
+
+ #side-nav {
+ min-width: var(--side-nav-fixed-width);
+ max-width: var(--side-nav-fixed-width);
+ top: var(--top-height);
+ overflow: visible;
+ }
+
+ #nav-tree, #side-nav {
+ height: calc(100vh - var(--top-height)) !important;
+ }
+
+ #nav-tree {
+ padding: 0;
+ }
+
+ #top {
+ display: block;
+ border-bottom: none;
+ height: var(--top-height);
+ margin-bottom: calc(0px - var(--top-height));
+ max-width: var(--side-nav-fixed-width);
+ overflow: hidden;
+ background: var(--side-nav-background);
+ }
+ #main-nav {
+ float: left;
+ padding-right: 0;
+ }
+
+ .ui-resizable-handle {
+ cursor: default;
+ width: 1px !important;
+ box-shadow: 0 calc(-2 * var(--top-height)) 0 0 var(--separator-color);
+ }
+
+ #nav-path {
+ position: fixed;
+ right: 0;
+ left: var(--side-nav-fixed-width);
+ bottom: 0;
+ width: auto;
+ }
+
+ #doc-content {
+ height: calc(100vh - 31px) !important;
+ padding-bottom: calc(3 * var(--spacing-large));
+ padding-top: calc(var(--top-height) - 80px);
+ box-sizing: border-box;
+ margin-left: var(--side-nav-fixed-width) !important;
+ }
+
+ #MSearchBox {
+ width: calc(var(--side-nav-fixed-width) - calc(2 * var(--spacing-medium)));
+ }
+
+ #MSearchField {
+ width: calc(var(--side-nav-fixed-width) - calc(2 * var(--spacing-medium)) - 65px);
+ }
+
+ #MSearchResultsWindow {
+ left: var(--spacing-medium) !important;
+ right: auto;
+ }
+}