resolves #475 fix crash when running in environments with non-Unicode…

… locale

CHANGELOG.adoc

@@ -5,6 +5,10 @@
 This document provides a high-level view of the changes to the {project-name} by release.
 For a detailed view of what has changed, refer to the {uri-repo}/commits/master[commit history] on GitHub.
 
+== Unreleased
+
+* fix crash when running in environments with non-Unicode locale (#475)
+
 == 2.1.3 (2024-05-12) - @slonopotamus
 
 * fix crash when section title contains inline anchor (#472)

data/styles/_colors.scss

@@ -1,3 +1,5 @@
+@charset "UTF-8";
+
 $black: #000000;
 $off-black: #101010;
 $deep-gray: #202020;

data/styles/_reset.scss

@@ -1,3 +1,5 @@
+@charset "UTF-8";
+
 /* educate older readers about tags introduced in HTML5 */
 article, aside, details, figcaption, figure, footer, header, hgroup, menu, nav, section, summary {
   display: block;

data/styles/epub3-css3-only.scss

@@ -1,3 +1,5 @@
+@charset "UTF-8";
+
 /* Gitden & Namo default to 16px font-size; bump it to 19px (118.75%) */
 body.gitden-reader,
 body.namo-epub-library {

data/styles/epub3-fonts.scss

@@ -1,3 +1,5 @@
+@charset "UTF-8";
+
 @font-face {
   font-family: "Noto Serif";
   font-style: normal;

data/styles/epub3.scss

@@ -1,3 +1,5 @@
+@charset "UTF-8";
+
 @import "reset";
 @import "colors";
 @import url("epub3-fonts.css");