apache · necouchman · Sep 5, 2025 · Sep 4, 2025 · Sep 5, 2025
diff --git a/_includes/head.html b/_includes/head.html
@@ -1,5 +1,7 @@
 <head>
-    <link rel="stylesheet" href="/styles/main.css?s={{ 'now' | date: '%s' }}">
+    {% assign sum = 'styles/*.{,s}css' | checksum %}
+    <link rel="stylesheet" href="/styles/main-light.css?s={{ sum }}">
+    <link rel="stylesheet" href="/styles/main-dark.css?s={{ sum }}" media="(prefers-color-scheme: dark)">
     <link rel="icon" type="image/svg+xml" href="/images/logos/guac-classic-logo.svg"/>
     <link rel="icon" type="image/png" href="/images/logos/guac-classic-logo-64.png"/>
     <meta name="viewport" content="width=device-width, initial-scale=1.0, maximum-scale=1.0, minimum-scale=1.0, user-scalable=no, target-densitydpi=device-dpi"/>

diff --git a/_plugins/checksum.rb b/_plugins/checksum.rb
@@ -0,0 +1,46 @@
+#
+# Licensed to the Apache Software Foundation (ASF) under one
+# or more contributor license agreements.  See the NOTICE file
+# distributed with this work for additional information
+# regarding copyright ownership.  The ASF licenses this file
+# to you under the Apache License, Version 2.0 (the
+# "License"); you may not use this file except in compliance
+# with the License.  You may obtain a copy of the License at
+#
+#   http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing,
+# software distributed under the License is distributed on an
+# "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+# KIND, either express or implied.  See the License for the
+# specific language governing permissions and limitations
+# under the License.
+#
+
+require 'digest'
+
+module GuacChecksumFilter
+
+    #
+    # Returns an arbitrary, unique checksum for the files matching the given
+    # glob pattern, calculated from each file's contents. The resulting checksum
+    # is guaranteed to be safe for inclusion within URLs.
+    #
+    # == Parameters:
+    # input::
+    #     The glob pattern matching the files to use to generate the checksum.
+    # 
+    # == Returns:
+    # An arbitrary, unique checksum generated from the contents of each matching
+    # file.
+    #
+    def checksum(input)
+      digest = Dir.glob(input).sort().reduce(Digest::SHA2) { |digest, filename| digest.file filename }
+        digest.hexdigest
+    end
+
+end
+
+# Register checksum filter with Liquid
+Liquid::Template.register_filter(GuacChecksumFilter)
+
diff --git a/images/backgrounds/bowl-clip-bottom-dark.svg b/images/backgrounds/bowl-clip-bottom-dark.svg
diff --git a/images/backgrounds/bowl-clip-bottom.svg → ...es/backgrounds/bowl-clip-bottom-light.svg b/images/backgrounds/bowl-clip-bottom.svg → ...es/backgrounds/bowl-clip-bottom-light.svg
diff --git a/images/backgrounds/bowl-clip-top-dark.svg b/images/backgrounds/bowl-clip-top-dark.svg
diff --git a/images/backgrounds/bowl-clip-top.svg → images/backgrounds/bowl-clip-top-light.svg b/images/backgrounds/bowl-clip-top.svg → images/backgrounds/bowl-clip-top-light.svg
diff --git a/images/home/feature-access-anywhere-dark.svg b/images/home/feature-access-anywhere-dark.svg
diff --git a/images/home/feature-access-anywhere-light.svg b/images/home/feature-access-anywhere-light.svg
diff --git a/images/home/feature-access-anywhere.svg b/images/home/feature-access-anywhere.svg
diff --git a/images/home/feature-cloud-desktop-dark.svg b/images/home/feature-cloud-desktop-dark.svg
diff --git a/images/home/feature-cloud-desktop-light.svg b/images/home/feature-cloud-desktop-light.svg
diff --git a/images/home/feature-cloud-desktop.svg b/images/home/feature-cloud-desktop.svg
diff --git a/images/home/feature-open-source-dark.svg b/images/home/feature-open-source-dark.svg