diff --git a/netlify/functions/agent-proxy.js b/netlify/functions/agent-proxy.js
index 0a51b6e..8c26282 100644
--- a/netlify/functions/agent-proxy.js
+++ b/netlify/functions/agent-proxy.js
@@ -12,29 +12,10 @@ import Anthropic from '@anthropic-ai/sdk'
 // ---------------------------------------------------------------------------
 // Managed Agent configuration
 // ---------------------------------------------------------------------------
-// The Managed Agent ID is supplied via the ANTHROPIC_AGENT_ID env var. When
-// present the call is routed to that agent. Otherwise we fall back to a
-// system-prompt-driven "virtual agent" that defines the persona inline.
-
-const SYSTEM_PROMPT = `You are the "PMC Funder Discovery Agent", an expert
-fundraising consultant for U.S. public media stations (NPR/PBS member
-stations, community radio, and independent public broadcasters).
-
-Your job is to take a brief intake form about a public media station and
-produce a tailored funding outlook that includes:
-  1. A short profile of the station based on the supplied details.
-  2. 3-5 likely foundation funders that match the station's mission and
-     geography (CPB, Knight, MacArthur, Wyncote, regional community
-     foundations, etc.).
-  3. 2-3 corporate underwriting angles relevant to the station's market.
-  4. Concrete next steps for the development director.
-
-Write in clear, direct prose. Use Markdown headings and bullet lists. If
-you need additional information, you may emit a tool_use block requesting
-it; otherwise produce the brief in one pass. Avoid speculation about
-specific dollar amounts.`
-
-const MODEL = process.env.ANTHROPIC_MODEL || 'claude-sonnet-4-5'
+// The Managed Agent ID is supplied via the ANTHROPIC_AGENT_ID env var. The
+// agent's system prompt and model are defined in the Claude Console and used
+// by default. ANTHROPIC_MODEL and ANTHROPIC_SYSTEM_PROMPT may optionally
+// override them.
 
 // ---------------------------------------------------------------------------
 // Anthropic client (reused across warm Lambda invocations)
@@ -67,8 +48,6 @@ export default async (req /*, context */) => {
   }
 
   const {
-    userName = '',
-    userEmail = '',
     stationName = '',
     stationLocation = '',
     stationWebsite = '',
@@ -93,23 +72,17 @@ export default async (req /*, context */) => {
 
   const userMessage = `Here is a new public media station intake:
 
-- Submitter Name: ${userName}
-- Submitter Email: ${userEmail}
 - Station Name: ${stationName}
 - Station Location: ${stationLocation}
 - Station Website: ${stationWebsite}
 
-Please draft the funding outlook brief described in your instructions.`
+Please follow your instructions to produce the funding outlook brief.`
 
   // ----- Build the streaming request -----
-  // Note: when calling a Managed Agent, the Anthropic SDK accepts an
-  // `agent_id` field on the messages.stream() call. We include it
-  // conditionally so the same code path also works with a plain system
-  // prompt while you're wiring things up.
+  // The Managed Agent's system prompt and model (configured in the Claude
+  // Console) are used by default. Optional env vars can override them.
   const streamArgs = {
-    model: MODEL,
     max_tokens: 10000,
-    system: SYSTEM_PROMPT,
     messages: [
       {
         role: 'user',
@@ -120,6 +93,12 @@ Please draft the funding outlook brief described in your instructions.`
   if (process.env.ANTHROPIC_AGENT_ID) {
     streamArgs.agent_id = process.env.ANTHROPIC_AGENT_ID
   }
+  if (process.env.ANTHROPIC_MODEL) {
+    streamArgs.model = process.env.ANTHROPIC_MODEL
+  }
+  if (process.env.ANTHROPIC_SYSTEM_PROMPT) {
+    streamArgs.system = process.env.ANTHROPIC_SYSTEM_PROMPT
+  }
 
   const upstream = client.messages.stream(streamArgs)
 
diff --git a/src/index.css b/src/index.css
index 1865889..9c335d6 100644
--- a/src/index.css
+++ b/src/index.css
@@ -5,7 +5,7 @@
 html,
 body {
   font-family: 'Noto Serif', serif;
-  background-color: #f7f4ee;
+  background-color: #ffffff;
   color: #1f1b16;
 }