diff --git a/resources/details.css b/components/layout/stylesheets/details.css
similarity index 100%
rename from resources/details.css
rename to components/layout/stylesheets/details.css
diff --git a/components/script/dom/htmldetailselement.rs b/components/script/dom/htmldetailselement.rs
index d6dacac911b..1db5d035c94 100644
--- a/components/script/dom/htmldetailselement.rs
+++ b/components/script/dom/htmldetailselement.rs
@@ -5,10 +5,9 @@
 use std::cell::{Cell, Ref};
 
 use dom_struct::dom_struct;
-use embedder_traits::resources::Resource;
 use html5ever::{LocalName, Prefix, local_name};
 use js::rust::HandleObject;
-use script_layout_interface::parse_resource_stylesheet;
+use script_layout_interface::parse_details_stylesheet;
 use style::attr::AttrValue;
 
 use super::element::ElementCreator;
@@ -138,12 +137,11 @@ impl HTMLDetailsElement {
             .AppendChild(link_element.upcast::<Node>(), can_gc)
             .unwrap();
 
-        let details_stylesheet = parse_resource_stylesheet(
+        let details_stylesheet = parse_details_stylesheet(
             link_element
                 .upcast::<Node>()
                 .owner_doc()
                 .style_shared_lock(),
-            Resource::DetailsCSS,
         );
         link_element.set_stylesheet(details_stylesheet.unwrap());
 
diff --git a/components/shared/embedder/resources.rs b/components/shared/embedder/resources.rs
index 7716fd20c92..28464a95d1a 100644
--- a/components/shared/embedder/resources.rs
+++ b/components/shared/embedder/resources.rs
@@ -66,7 +66,6 @@ pub fn sandbox_access_files_dirs() -> Vec<PathBuf> {
         .unwrap_or_default()
 }
 
-#[derive(Clone)]
 pub enum Resource {
     /// A list of GATT services that are blocked from being used by web bluetooth.
     /// The format of the file is a list of UUIDs, one per line, with an optional second word to specify the
@@ -110,9 +109,6 @@ pub enum Resource {
     DirectoryListingHTML,
     /// A HTML page that is used for the about:memory url.
     AboutMemoryHTML,
-    /// A CSS file to style the elements inside <details> element UA Shadow Tree.
-    /// It can be empty but then <details> element simply wouldn't work.
-    DetailsCSS,
 }
 
 impl Resource {
@@ -127,7 +123,6 @@ impl Resource {
             Resource::CrashHTML => "crash.html",
             Resource::DirectoryListingHTML => "directory-listing.html",
             Resource::AboutMemoryHTML => "about-memory.html",
-            Resource::DetailsCSS => "details.css",
         }
     }
 }
@@ -172,7 +167,6 @@ fn resources_for_tests() -> Box<dyn ResourceReaderMethods + Sync + Send> {
                 Resource::AboutMemoryHTML => {
                     &include_bytes!("../../../resources/about-memory.html")[..]
                 },
-                Resource::DetailsCSS => &include_bytes!("../../../resources/details.css")[..],
             }
             .to_owned()
         }
diff --git a/components/shared/script_layout/lib.rs b/components/shared/script_layout/lib.rs
index ac521c622c9..37d05c31286 100644
--- a/components/shared/script_layout/lib.rs
+++ b/components/shared/script_layout/lib.rs
@@ -20,7 +20,6 @@ use base::Epoch;
 use base::id::{BrowsingContextId, PipelineId, WebViewId};
 use compositing_traits::CrossProcessCompositorApi;
 use constellation_traits::{LoadData, ScrollState};
-use embedder_traits::resources::{self, Resource};
 use embedder_traits::{Theme, UntrustedNodeAddress, ViewportDetails};
 use euclid::default::{Point2D, Rect};
 use fnv::FnvHashMap;
@@ -54,6 +53,9 @@ use url::Url;
 use webrender_api::ImageKey;
 use webrender_api::units::DeviceIntSize;
 
+/// A CSS file to style <details> element.
+static DETAILS_CSS: &[u8] = include_bytes!("../../layout/stylesheets/details.css");
+
 pub trait GenericLayoutDataTrait: Any + MallocSizeOfTrait {
     fn as_any(&self) -> &dyn Any;
 }
@@ -671,10 +673,8 @@ pub fn parse_ua_stylesheet(
         .map(DocumentStyleSheet)
 }
 
-pub fn parse_resource_stylesheet(
+pub fn parse_details_stylesheet(
     shared_lock: &SharedRwLock,
-    resources: Resource,
 ) -> Result<ServoArc<Stylesheet>, &'static str> {
-    let content = &resources::read_bytes(resources.clone());
-    parse_stylesheet_as_origin(shared_lock, resources.filename(), content, Origin::Author)
+    parse_stylesheet_as_origin(shared_lock, "details.css", DETAILS_CSS, Origin::Author)
 }