diff --git a/assets/css/default.css b/assets/css/default.css
index d38394a..5967579 100644
--- a/assets/css/default.css
+++ b/assets/css/default.css
@@ -694,6 +694,82 @@ span > select {
   }
 }
 
+/*
+ * No theme
+ */
+
+body.no-theme {
+    background-color: initial; /* oder eine gewünschte Standard-Hintergrundfarbe */
+    color: initial; /* Standard Textfarbe */
+}
+
+/* Links */
+.no-theme a {
+    color: #335d7a;
+    text-decoration: none;
+}
+
+.no-theme a:hover,
+.no-theme a:active,
+.no-theme a:focus,
+.no-theme summary:hover,
+.no-theme summary:focus {
+    color: #075A9E !important;
+}
+
+/* Buttons */
+.no-theme .pure-button-primary,
+.no-theme .pure-button-secondary {
+    border: 1px solid #a0a0a0;
+    border-radius: 3px;
+    color: rgba(35, 35, 35, 1);
+    background-color: #a0a0a0;
+}
+
+.no-theme .pure-button-primary:hover,
+.no-theme .pure-button-primary:focus,
+.no-theme .pure-button-secondary:hover,
+.no-theme .pure-button-secondary:focus {
+    color: #fff !important;
+    border-color: rgba(0, 182, 240, 0.75) !important;
+    background-color: rgba(0, 182, 240, 0.75) !important;
+}
+
+/* Footer */
+.no-theme footer {
+    color: #7c7c7c;
+}
+
+.no-theme footer a {
+    color: #7c7c7c !important;
+}
+
+/* Formularelemente */
+.no-theme input,
+.no-theme select,
+.no-theme textarea {
+    color: initial;
+    background-color: initial;
+    border: 1px solid #ccc;
+    border-radius: 5px;
+}
+
+/* Suchleiste */
+.no-theme .searchbar input[type="search"] {
+    background-color: inherit;
+    color: inherit;
+    border: 1px solid #ccc;
+}
+
+/* Scrollbar (optional) */
+.no-theme ::-webkit-scrollbar {
+    background-color: #f0f0f0;
+}
+
+.no-theme ::-webkit-scrollbar-thumb {
+    background-color: #ccc;
+}
+
 
 /*
  * Dark theme