made collapsible elements easier to distinguish

CHANGELOG

@@ -21,4 +21,5 @@ Nov 16, 2022 · forked, rebased theme from Gitea's default theme, adopted colors
     Of course, being more specific may result in other related attributes not changing. So, be sure to retest any change.
 
 Nov 17, 2022 · changed row highlight color
-Nov 18, 2022 · made pull requests and new releases menu item and .diff-detail-box background match --color-background
+Nov 18, 2022 · made pull requests and new releases menu item and .diff-detail-box background match --color-background
+Nov 29, 2022 · made collapsible elements easier to distinguish from main body

README.md

@@ -36,6 +36,6 @@ Using Dark Reader web browser extension:
 
 - [x] ~~When you overscroll, still see green color~~ (added `THEME_COLOR_META_TAG` to app.ini)
 - [x] ~~With Dark Reader, not the entire page is the same color~~ (replaced `body{}` with `.full.height{}` in theme-red.css)
-- [x] Directories sometimes turn blue (~~testing a fix~~ because of Dark Reader and you cleared your browser history, just refresh browser)
+- [x] Directories sometimes turn blue (~~testing a fix~~ because of Dark Reader ~~and you cleared your browser history~~, just refresh browser page)
 
 Theme coded with ♥ in VSCodium

public/css/theme-red.css

@@ -74,4 +74,10 @@ span.green .svg {
 
 .repository .diff-detail-box {
     background: unset!important; /* make diff-detail-box background match --color-background */
+}
+
+details {
+    background-color: var(--color-secondary-light-2); /* make collapsible elements easier to distinguish from main body */
+	border-radius: 4px; /* same as code blocks */
+	padding: .2em .4em; /* same as code blocks */
 }