diff --git a/src/css/y.css b/src/css/y.css
index 4069e07..35d6e4e 100644
--- a/src/css/y.css
+++ b/src/css/y.css
@@ -1,5 +1,5 @@
 html {
-    font-family: -apple-system, BlinkMacSystemFont, avenir next, avenir, segoe ui, helvetica neue, helvetica, Cantarell, Ubuntu, roboto, noto, arial, sans-serif;
+    font-family: "PT Serif", serif;
     font-size: large;
     line-height: 1.5;
 }
@@ -15,14 +15,14 @@ body { padding-top: 5px;
 #toc,#TOC {text-align: left;}
 .main { min-height: calc(100vh - 1em); }
 h1,h2,h3,h4,h5,h6,.abstract {
-    font-family: Georgia, Palatino, serif;
+    font-family: "PT Sans Narrow", sans-serif;
     line-height: calc(1ex/0.42);
     margin: 1rem 0; }
 header > .content > h1 { margin: 0 0 1rem 0; }
 p { text-align: justify; hyphens: auto; }
 pre { overflow-x: scroll; padding: 1em; border-left: dotted 1px; }
 pre > code { background: none; font-size: 0.875em; padding: 0; }
-code,pre { font-family: Menlo, Consolas, Monaco, Liberation Mono, Lucida Console, monospace; font-size: 0.825em; }
+code,pre { font-family: "PT Mono", monospace; font-size: 0.825em; }
 code { padding: 1px 3px; }
 figure { margin: 1rem 0; padding: 0; }
 hr { opacity: 0.3; }