webconfig: add font styling to vuln.go.dev pages

Change-Id: I5c48ce4fbf75eebbf3d88fc0ebafc3a9b1a1b401
Reviewed-on: https://go-review.googlesource.com/c/vulndb/+/411235
Run-TryBot: Jonathan Amsterdam <jba@google.com>
Reviewed-by: Julie Qiu <julieqiu@google.com>
TryBot-Result: Gopher Robot <gobot@golang.org>
diff --git a/webconfig/404.html b/webconfig/404.html
index b8c75e1..569edf0 100644
--- a/webconfig/404.html
+++ b/webconfig/404.html
@@ -4,6 +4,13 @@
     <meta charset="utf-8" />
     <meta name="viewport" content="width=device-width, initial-scale=1.0" />
     <title>Not Found: Go Vulnerability Database</title>
+    <style>
+      body {
+          font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Helvetica, Arial, sans-serif;
+          font-size: 1rem;
+          line-height: normal;
+      }
+    </style>
   </head>
   <body>
     <h1>Not Found</h1>
diff --git a/webconfig/index.html b/webconfig/index.html
index c30bb0f..2031038 100644
--- a/webconfig/index.html
+++ b/webconfig/index.html
@@ -4,6 +4,13 @@
     <meta charset="utf-8" />
     <meta name="viewport" content="width=device-width, initial-scale=1.0" />
     <title>Go Vulnerability Database</title>
+    <style>
+      body {
+          font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Helvetica, Arial, sans-serif;
+          font-size: 1rem;
+          line-height: normal;
+      }
+    </style>
   </head>
   <body>
     <h1>Go Vulnerability Database</h1>