Fix doc theme if Browser in dark mode

Author: djibe

docs-assets/scss/docs.scss

@@ -456,6 +456,8 @@
   letter-spacing: normal;
 }
 
+// Doc icons
+
 [class*='lgi-icon'] {
   background-size: 24px;
   border-radius: 50%;
@@ -476,3 +478,22 @@
 .lgi-icon-plugin {
   background-image: url('data:image/svg+xml;base64,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');
 }
+
+// Dark theme
+
+@media (prefers-color-scheme: dark) {
+  html {
+    filter: none;
+  }
+
+  body,
+  label {
+    font-weight: initial;
+  }
+
+  img,
+  video,
+  .prevent-dark-mode {
+    filter: none;
+  }
+}