diff --git a/themes/learn2/css/custom.css b/themes/learn2/css/custom.css
deleted file mode 100644
index ed4a92d..0000000
--- a/themes/learn2/css/custom.css
+++ /dev/null
@@ -1,166 +0,0 @@
-/*
-Put your custom CSS in this file.
-*/
-
-/* sidebar big lower portion */
-#sidebar {
-    /*background-color: #262c31;*/
-    /*background-color: #131114;*/
-    /*background-color: #34233a;*/
-    /*background-color: #2e2333;*/
-    background-color: #47314f;
-}
-
-/* sidebar top portion */
-#sidebar #header {
-    /*background-color: #111314;*/
-    /*background-color: #1e1321;*/
-    /*background-color: #111111;*/
-    background-color: #9c5ea2;
-}
-
-/* search box in sidebar */
-#sidebar #header .searchbox {
-    /*background: #262c31;*/
-    background: #222222;
-    /*border-color: #530e64;*/
-    border-color: #2e2333;
-    border-radius: 0px;
-    border-width: 2px;
-}
-
-/* magnifying glass in search box */
-#sidebar #header .searchbox label {
-    color: rgba(200, 200, 200, 0.8);
-}
-
-/* search box entered text */
-#sidebar #header .searchbox input {
-    color: #fff;
-}
-
-/* search box placeholder text */
-#sidebar #header .searchbox input::placeholder {
-    color: rgba(200, 200, 200, 0.8);
-    opacity: 1; /* something firefox fix */
-}
-
-/* very thin bar between last topic and clear history */
-#sidebar hr {
-    border-bottom: 1px solid #47314f
-}
-
-/* full content */
-body {
-    background: #111111;
-    color: #dddddd;
-}
-
-/* code blocks */
-pre[class*="language-"] {
-    background: #222222 !important;
-    border: 1px solid #555555 !important;
-}
-code[class*="language-"] {
-    background: #222222 !important;
-}
-pre code {
-    /*color: #b51c42;*/
-    color: #c897d8 !important;
-    /* this padding fixes indent on first line for codeblocks */
-    padding: 0 !important;
-}
-pre .copy-to-clipboard {
-    background-color: #111111 !important;
-    /*
-    to revert the fix for "copy" button
-    margin-top: 0;
-    */
-}
-pre .copy-to-clipboard:hover {
-    background-color: #333333 !important;
-}
-
-/* inline code */
-code {
-    /*color: #b51c42;*/
-    color: #c897d8;
-    background: #222222;
-}
-.copy-to-clipboard {
-    background-color: #111111;
-    background-image: url(../images/clippy-white.svg);
-    /*
-    makes "copy" button fit slightly better imo
-    FIXME this breaks chromium
-    margin-top: .2rem;
-    */
-}
-.copy-to-clipboard:hover {
-    background-color: #333333;
-}
-
-/* Sidebar topics */
-#sidebar ul.topics > li.parent, #sidebar ul.topics > li.active {
-    /*background: #322535;*/
-    /*background: #241e26;*/
-    /*background: #252226;*/
-    background: #312037;
-}
-
-/* Sidebar currently selected main topic */
-#sidebar ul li.active > a {
-    background: #111111;
-    color: #dddddd !important;
-}
-
-/* HACK hide checkmark icons */
-.fa.fa-check.read-icon {
-    visibility: hidden;
-}
-
-/* outline around search bar when clicked */
-textarea:focus, input[type="email"]:focus, input[type="number"]:focus, input[type="password"]:focus, input[type="search"]:focus, input[type="tel"]:focus, input[type="text"]:focus, input[type="url"]:focus, input[type="color"]:focus, input[type="date"]:focus, input[type="datetime"]:focus, input[type="datetime-local"]:focus, input[type="month"]:focus, input[type="time"]:focus, input[type="week"]:focus, select[multiple="multiple"]:focus {
-    /*box-shadow: inset 0 1px 3px rgba(0, 0, 0, 0.06), 0 0 5px rgba(164, 124, 178, 0.7);*/
-    box-shadow: none;
-}
-
-/* Blockquote */
-blockquote {
-    border-left: 10px solid #9C5EA2;
-}
-
-/* Hides the sub-menu item if parent not active
-.dd-item .dd-item ul li {
-    display: none;
-}
-
-.dd-item .dd-item.active ul li,
-.dd-item.parent > ul > li {
-    display: block;
-}
-
- Hides the sub-sub-menu menu-item if parent not active 
-.dd-item.parent > ul > li.dd-item.active > ul > li > ul > li {
-    display: none;
-}
-
-.dd-item.parent > ul > li.dd-item.active > ul > li {
-    display: block;
-}
-*/
-
-/* hide scrollbar from jquery.scrollbar. Firefox already adds one anyways */
-/*.scroll-element.scroll-y {
-    display: none !important;
-}*/
-
-/* random stuff */
-.highlightable {
-    overflow: auto;
-}
-
-/* table headings */
-thead {
-	color: #111111;
-}