diff --git a/.gitignore b/.gitignore
index 6b21beb..448b736 100644
--- a/.gitignore
+++ b/.gitignore
@@ -109,3 +109,15 @@ package-lock.json
 
 # Local Netlify folder
 .netlify
+
+# AI development tools (local only)
+.ai/
+.claude/
+
+# Deno lockfile — edge functions are currently disabled
+deno.lock
+
+# OurAirports source data — not committed (123 KB precomputed map is in netlify/airport-map-data.json)
+# To regenerate: download from https://davidmegginson.github.io/ourairports-data/airports.csv
+#   then run: npm run build:airports
+airports.csv
diff --git a/static/index.css b/static/index.css
index e2ed028..e33154e 100644
--- a/static/index.css
+++ b/static/index.css
@@ -154,7 +154,7 @@ body {
   flex-direction: column;
   justify-content: center;
   align-items: center;
-  height:100%;
+  min-height:100vh;
   margin:0;
 }
 
@@ -180,7 +180,7 @@ padding:0, 1em;
   display: none;
 }
 .content {
-  margin-top:10vh;
+  margin-top:0;
   width: 500px;
   max-width:100%;
   line-height:150%;
diff --git a/static/index.html b/static/index.html
index bb882f7..46871c1 100644
--- a/static/index.html
+++ b/static/index.html
@@ -10,17 +10,16 @@
   <div class="content">
     <div class="clock"></div>
     <h1>timezone.fyi</h1>
-    This site lets you quickly share a time across multiple time zones.
+    Quickly share a time across multiple time zones.
     <p>Simply type a url with the following structure:
       <br><b><a href="/10:30am,pst,est">https://timezone.fyi/10:30am,pst,est</a></b>
     <p>The first listed time zone will be treated as the primary. Zones can be expressed as:
     <ul>
-      <li><b><a href="https://en.wikipedia.org/wiki/List_of_tz_database_time_zones">Timezone abbreviation</a></b> — e.g. <a href="/10:30am,GMT,PST">GMT</a>, <a href="/10:30am,EST,PST">EST</a>, <a href="/10:30am,JST,PST">JST</a></li>
-      <li><b><a href="https://en.wikipedia.org/wiki/IATA_airport_code">Airport code</a></b> — e.g. <a href="/10:30am,SFO,JFK,LHR">SFO</a>, <a href="/10:30am,SFO,JFK,LHR">JFK</a>, <a href="/10:30am,SFO,JFK,LHR">LHR</a></li>
-      <li><b><a href="https://en.wikipedia.org/wiki/List_of_airports_by_IATA_metropolitan_area_code">Metro area code</a></b> — e.g. <a href="/10:30am,NYC,LON,TYO">NYC</a>, <a href="/10:30am,NYC,LON,TYO">LON</a>, <a href="/10:30am,NYC,LON,TYO">TYO</a></li>
+      <li><b><a href="https://en.wikipedia.org/wiki/List_of_tz_database_time_zones">Standard timezones</a></b> — e.g. <a href="/10:30am,GMT,PST">GMT</a>, <a href="/10:30am,EST,PST">EST</a>, <a href="/10:30am,JST,PST">JST</a></li>
+      <li><b><a href="https://en.wikipedia.org/wiki/List_of_international_airports_by_country">Airport codes</a></b> — e.g. <a href="/10:30am,SFO,LHR,SIN">SFO</a>, <a href="/10:30am,SFO,LHR,SIN">LHR</a>, <a href="/10:30am,SFO,LHR,SIN">SIN</a></li>
+      <li><b><a href="https://en.wikipedia.org/wiki/IATA_airport_code#Cities_with_multiple_commercial_airports">Metro area codes</a></b> — e.g. <a href="/10:30am,NYC,LON,PAR">NYC</a>, <a href="/10:30am,NYC,LON,PAR">LON</a>, <a href="/10:30am,NYC,LON,PAR">PAR</a></li>
     </ul>
-    <p>When you send these via Slack, SMS, and other modern chat clients,
-      <br>they'll expand to show times in every listed zone.
+    <p>Links expand in Slack, SMS, and other modern chat clients to show times in every listed zone.
   </div>
 </body>