Fix

themes/mytheme/layouts/partials/head.html

@@ -37,6 +37,11 @@
 <meta name="naver-site-verification" content="{{ site.Params.analytics.naver.SiteVerificationTag }}">
 {{- end }}
 
+<script type="text/javascript">
+    let vh = window.innerHeight * 0.01;
+    document.documentElement.style.setProperty('--vh', `${vh}px`);
+</script>
+
 {{- /* Styles */}}
 
 {{- /* includes */}}