diff --git a/build.py b/build.py
index 9f7ed49..fe749ca 100644
--- a/build.py
+++ b/build.py
@@ -132,7 +132,7 @@ sheets: ["/static/highlight.css"]
 <article class="panel">
 <h1>{input['title']}</h1>
 <p>{input['date']}</p>
-<a href="{'/' / path.parent}">back</a>py{{{{ ' | ' if minimal else ' ' }}}}<a href="{'/' / path}">raw</a>
+<a href=".">back</a>py{{{{ ' | ' if minimal else ' ' }}}}<a href="{path.name}">raw</a>
 <p>{format_tags(input['tags'])}</p>
 <hr>
 {html}
@@ -151,9 +151,11 @@ def index_dir(dir):
     else:
         f = reversed(sorted([p for p in dir.glob('*') if not p.name.startswith('.')], key=os.path.getmtime))
     def href(x):
+        if x.is_dir():
+            return f'{x.name}/'
         if x.suffix in ['.md', '.html']:
-            return x.with_suffix('')
-        return x
+            return x.with_suffix('').name
+        return x.name
     def title(x):
         if x.suffix in ['.md', '.html']:
             return frontmatter.load(x).metadata['title']
@@ -164,9 +166,9 @@ title: '{dir}'
 <div class="container">
 <div class="panel">
 <h2>{dir}</h2>
-<a href="{'/' / dir.parent}">back</a>
+<a href="..">back</a>
 <ul>
-{chr(10).join(f'<li><a href="/{href(x)}">{title(x)}</a></li>' for x in f)}
+{chr(10).join(f'<li><a href="{href(x)}">{title(x)}</a></li>' for x in f)}
 </ul>
 </div>
 </div>'''
diff --git a/pages/index.html b/pages/index.html
index c2a9fbb..6f87761 100644
--- a/pages/index.html
+++ b/pages/index.html
@@ -5,10 +5,10 @@ title: home
   <div class="panel c">
     <h2>py{{ '&#x03BC.twoha.cc' if minimal else 'u.twoha.cc' }}</h2>
     <hr>
-    <a href="/about">about</a><br>
-    <a href="/contact">contact</a><br>
-    <a href="/uses">uses</a><br>
-    <a href="/ctf">ctf</a><br>
+    <a href="about">about</a><br>
+    <a href="contact">contact</a><br>
+    <a href="uses">uses</a><br>
+    <a href="ctf/">ctf</a><br>
     <hr>
     py{{ '<a href="https://u.twoha.cc">full site</a>' if minimal else '<a href="https://mu.twoha.cc">minimal</a>' }}
   </div>
diff --git a/templates/base.html b/templates/base.html
index 6cde981..acd6dce 100644
--- a/templates/base.html
+++ b/templates/base.html
@@ -33,7 +33,7 @@
     <a href="/about">about</a><p>[ about ]</p>
     <a href="/contact">contact</a><p>[ contact ]</p>
     <a href="/uses">uses</a><p>[ uses ]</p>
-    <a href="/ctf">ctf</a><p>[ ctf ]</p>
+    <a href="/ctf/">ctf</a><p>[ ctf ]</p>
     <hr>
   </nav>
   <div class="panel" id="settings">