Variable UserAgentPageCssConst
UserAgentPageCss: "\n@namespace \"http://www.w3.org/1999/xhtml\";\n\n:root {\n hyphens: -epubx-expr(pref-hyphenate? \"auto\": \"manual\");\n}\n:root[data-vivliostyle-epub-spine-properties~=\"page-spread-left\"] {\n break-before: left;\n}\n:root[data-vivliostyle-epub-spine-properties~=\"page-spread-right\"] {\n break-before: right;\n}\n\n@-adapt-footnote-area {\n display: block;\n margin-block-start: 0.5em;\n margin-block-end: 0.5em;\n}\n\n@-adapt-footnote-area ::before {\n display: block;\n border-block-start-width: 1px;\n border-block-start-style: solid;\n border-block-start-color: black;\n margin-block-end: 0.4em;\n margin-inline-start: 0;\n margin-inline-end: 60%;\n}\n\n/* default page master */\n@-epubx-page-master :background-host {\n @-epubx-partition :layout-host {\n -epubx-flow-from: body;\n top: -epubx-expr(header.margin-bottom-edge);\n bottom: -epubx-expr(page-height - footer.margin-top-edge);\n left: 0px;\n right: 0px;\n column-width: 25em;\n }\n @-epubx-partition footer :oeb-page-foot {\n writing-mode: horizontal-tb;\n -epubx-flow-from: oeb-page-foot;\n bottom: 0px;\n left: 0px;\n right: 0px;\n }\n @-epubx-partition header :oeb-page-head {\n writing-mode: horizontal-tb;\n -epubx-flow-from: oeb-page-head;\n top: 0px;\n left: 0px;\n right: 0px;\n }\n}\n\n@page {\n @top-left-corner {\n text-align: right;\n vertical-align: middle;\n }\n @top-left {\n text-align: left;\n vertical-align: middle;\n }\n @top-center {\n text-align: center;\n vertical-align: middle;\n }\n @top-right {\n text-align: right;\n vertical-align: middle;\n }\n @top-right-corner {\n text-align: left;\n vertical-align: middle;\n }\n @left-top {\n text-align: center;\n vertical-align: top;\n }\n @left-middle {\n text-align: center;\n vertical-align: middle;\n }\n @left-bottom {\n text-align: center;\n vertical-align: bottom;\n }\n @right-top {\n text-align: center;\n vertical-align: top;\n }\n @right-middle {\n text-align: center;\n vertical-align: middle;\n }\n @right-bottom {\n text-align: center;\n vertical-align: bottom;\n }\n @bottom-left-corner {\n text-align: right;\n vertical-align: middle;\n }\n @bottom-left {\n text-align: left;\n vertical-align: middle;\n }\n @bottom-center {\n text-align: center;\n vertical-align: middle;\n }\n @bottom-right {\n text-align: right;\n vertical-align: middle;\n }\n @bottom-right-corner {\n text-align: left;\n vertical-align: middle;\n }\n}\n\n@media print {\n @page {\n margin: 10%;\n }\n}\n" = ...
user-agent-page.css