minor corrections and improvements regarding the user agent stylesheet

Author: martrapp

src/content/docs/basics/styling.mdx

@@ -213,8 +213,6 @@ The [API sets the defaults](/basics/styling/#group--morph-animation) to `0.25s`,
 Recently, all other animation properties but `animation-name` where added to the list.
 
 ```css
-::view-transition-group(*),
-::view-transition-group-children(*),
 ::view-transition-image-pair(*),
 ::view-transition-old(*),
 ::view-transition-new(*) {
@@ -258,13 +256,8 @@ Of course styling view transition pseudo-elements is not limited to animations.
   position: absolute;
   top: 0;
   left: 0;
-}
-
-::view-transition-group-children(*) {
-  position: absolute;
-  inset: 0px;
-  border-style: solid;
-  border-color: transparent;
+  animation-duration: 0.25s;
+  animation-fill-mode: both;
 }
 
 ::view-transition-image-pair(*) {
@@ -279,6 +272,13 @@ Of course styling view transition pseudo-elements is not limited to animations.
   inline-size: 100%;
   block-size: auto;
 }
+
+::view-transition-group-children(*) {
+  position: absolute;
+  inset: 0px;
+  border-style: solid;
+  border-color: transparent;
+}
 ```
 
 ## Selecting Pseudo-Elements…

src/content/docs/tips/over-exposure.mdx

@@ -73,7 +73,7 @@ This effect is most noticeable during a cross-fade involving the same image. \
 
 This happens because, during the transition, both images become partially transparent. As a result, you can see part of the background through the old and new image. When cross-fading between two opaque images, you wouldn't expect the background to be visible, but that's exactly what happens with the default settings. A bright background will make the image appear brighter, a dark background will darken it, and in the example above, a yellow background shines through as… yellow.
 
-## Set the Correct `mix-blend-mode`
+## Set the Correct mix-blend-mode
 
 When the View Transition API adds its default fade animations to the pseudo-elements for the old and the new image, it also adds the `-ua-mix-blend-mode-plus-lighter` animation, which is defined as: