diff --git a/ctrl/app.py b/ctrl/app.py
index 58c7c13..d16e1d9 100644
--- a/ctrl/app.py
+++ b/ctrl/app.py
@@ -5,6 +5,7 @@ import os
 import queue
 
 from flask import Flask, jsonify, request, send_from_directory, Response
+from werkzeug.exceptions import HTTPException
 
 import ctrl.db as db
 import ctrl.settings as settings
@@ -150,6 +151,8 @@ def api_stream(job_id):
 
 @app.errorhandler(Exception)
 def _handle_error(err):
+    if isinstance(err, HTTPException):
+        return err
     log.exception("Unhandled error serving %s %s", request.method, request.path)
     return jsonify({"error": f"{type(err).__name__}: {err}"}), 500
 
diff --git a/ctrl/static/style.css b/ctrl/static/style.css
index 67d905e..d4a876e 100644
--- a/ctrl/static/style.css
+++ b/ctrl/static/style.css
@@ -93,6 +93,7 @@ button:hover { filter: brightness(1.1); }
 .badge.queued, .badge.dispatching, .badge.building { background: #1c2a40; color: var(--accent); }
 .badge.cancelled { background: var(--panel-2); color: var(--muted); }
 
+.modal[hidden] { display: none; }
 .modal {
   position: fixed; inset: 0;
   background: rgba(0, 0, 0, 0.65);