Initial Drupal 11 with DDEV setup

web/core/modules/system/css/system.diff.css

@@ -0,0 +1,41 @@
+/**
+ * Traditional split diff theming
+ */
+table.diff {
+  width: 100%;
+  margin-bottom: 20px;
+  border-spacing: 4px;
+}
+table.diff .diff-context {
+  background-color: #fafafa;
+}
+table.diff .diff-deletedline {
+  width: 50%;
+  background-color: #ffa;
+}
+table.diff .diff-addedline {
+  width: 50%;
+  background-color: #afa;
+}
+table.diff .diffchange {
+  color: #f00;
+  font-weight: bold;
+}
+table.diff .diff-marker {
+  width: 1.4em;
+}
+table.diff th {
+  padding-right: inherit; /* LTR */
+}
+[dir="rtl"] table.diff th {
+  padding-right: 0;
+  padding-left: inherit;
+}
+table.diff td div {
+  overflow: auto;
+  padding: 0.1ex 0.5em;
+  word-wrap: break-word;
+}
+table.diff td {
+  padding: 0.1ex 0.4em;
+}