From 3cd99826d276965e1517e8104b390ee72c9f1b9e Mon Sep 17 00:00:00 2001
From: Alex Cabal <alex@standardebooks.org>
Date: Sun, 13 Dec 2020 12:38:29 -0600
Subject: [PATCH] Update core.css to new standard

---
 src/epub/css/core.css | 6 ++++++
 1 file changed, 6 insertions(+)

diff --git a/src/epub/css/core.css b/src/epub/css/core.css
index 67d129b..03fe168 100644
--- a/src/epub/css/core.css
+++ b/src/epub/css/core.css
@@ -117,3 +117,9 @@ a[epub|type~="noteref"]{
 section[epub|type~="endnotes"] > ol > li{
 	margin: 1em 0;
 }
+
+@media (prefers-color-scheme: dark){
+	img[epub|type~="se:image.color-depth.black-on-transparent"]{
+		filter: invert(100%);
+	}
+}