declare -xr HTML_HEADER=./extras/html/header.html.part
declare -xr HTML_FOOTER=./extras/html/footer.html.part
declare -xr HTML_CSS_STYLE=$HTML_THEME_DIR/style.css
declare -xr HTML_WEBFONT_HEADING=./extras/html/fonts/Merriweather/Merriweather-Bold.ttf
declare -xr HTML_WEBFONT_TEXT=./extras/html/fonts/Merriweather/Merriweather-Regular.ttf
declare -xr HTML_WEBFONT_CODE=./extras/html/fonts/hack/Hack-Regular.ttf
declare -xr HTML_WEBFONT_HANDNOTES=./extras/html/fonts/khand/khand.ttf
declare -xr SOURCE_HIGHLIGHT_CSS=./extras/html/source-highlight-styles/mono.css