diff --git a/voussoir.net/writing/css/dark.css b/voussoir.net/writing/css/dark.css
index ae5b3d1..55c5845 100644
--- a/voussoir.net/writing/css/dark.css
+++ b/voussoir.net/writing/css/dark.css
@@ -39,14 +39,23 @@ h5:hover > .header_anchor_link {display: initial;}
 
 html
 {
+    height: 100vh;
+    box-sizing: border-box;
+
     padding-top: 30px;
     padding-bottom: 30px;
     background-color: var(--color_htmlbg);
     color: var(--color_maintext);
+
     font-family: Verdana, sans-serif;
     font-size: 10pt;
 }
 
+*, *:before, *:after
+{
+    box-sizing: inherit;
+}
+
 a
 {
     color: var(--color_link);