diff --git a/src-tauri/src/services/orchestrator.rs b/src-tauri/src/services/orchestrator.rs
index 32981a2..f5823ca 100644
--- a/src-tauri/src/services/orchestrator.rs
+++ b/src-tauri/src/services/orchestrator.rs
@@ -51,6 +51,41 @@ pub fn build_analyst_prompt(ticket: &ProcessedTicket, project: &Project) -> Stri
 3. Evalue si une correction de code est necessaire
 4. Produis un rapport structure en markdown
 
+## Format de sortie obligatoire
+- Ecris un rapport en markdown avec des titres, des sous-titres et des listes.
+- Laisse une ligne vide entre chaque section.
+- Mets les labels importants en gras (ex: **Impact**, **Cause racine**).
+- Evite les gros paragraphes: maximum 4 lignes par paragraphe.
+- Respecte cette structure:
+
+# Analyse ticket #{artifact_id} - {title}
+
+## Resume executif
+- **Constat:**
+- **Impact:**
+- **Urgence:**
+
+## Diagnostic technique
+### Cause racine
+...
+### Indices observables
+- ...
+
+## Zone de code probable
+- `chemin/fichier.ext` - justification
+
+## Plan de correction
+1. ...
+2. ...
+
+## Risques et validations
+- **Risques:**
+- **Tests a executer:**
+
+## Conclusion
+- **Decision:** FIX_NEEDED ou NO_FIX
+- **Rationale courte:** ...
+
 Termine ton rapport par un de ces verdicts sur une ligne separee:
 [VERDICT: FIX_NEEDED] si une correction de code est necessaire
 [VERDICT: NO_FIX] si aucune correction n'est necessaire"#,
diff --git a/src/components/tickets/TicketDetail.tsx b/src/components/tickets/TicketDetail.tsx
index 87c0796..67fda53 100644
--- a/src/components/tickets/TicketDetail.tsx
+++ b/src/components/tickets/TicketDetail.tsx
@@ -492,13 +492,13 @@ export default function TicketDetail() {
       )}
 
       {tab === "analyst" && ticket.analyst_report && (
-        <div className="prose prose-sm max-w-none rounded-lg border border-gray-200 bg-white p-6">
+        <div className="markdown-report rounded-lg border border-gray-200 bg-white p-6">
           <Markdown remarkPlugins={[remarkGfm]}>{ticket.analyst_report}</Markdown>
         </div>
       )}
 
       {tab === "developer" && ticket.developer_report && (
-        <div className="prose prose-sm max-w-none rounded-lg border border-gray-200 bg-white p-6">
+        <div className="markdown-report rounded-lg border border-gray-200 bg-white p-6">
           <Markdown remarkPlugins={[remarkGfm]}>{ticket.developer_report}</Markdown>
         </div>
       )}
diff --git a/src/index.css b/src/index.css
index 9229e45..9f165e6 100644
--- a/src/index.css
+++ b/src/index.css
@@ -24,3 +24,92 @@
     cursor: not-allowed;
   }
 }
+
+.markdown-report {
+  color: #111827;
+  line-height: 1.6;
+  font-size: 0.95rem;
+}
+
+.markdown-report > :first-child {
+  margin-top: 0;
+}
+
+.markdown-report > :last-child {
+  margin-bottom: 0;
+}
+
+.markdown-report h1,
+.markdown-report h2,
+.markdown-report h3,
+.markdown-report h4 {
+  color: #0f172a;
+  font-weight: 700;
+  line-height: 1.3;
+  margin-top: 1.25rem;
+  margin-bottom: 0.65rem;
+}
+
+.markdown-report h1 {
+  font-size: 1.35rem;
+}
+
+.markdown-report h2 {
+  border-bottom: 1px solid #e5e7eb;
+  font-size: 1.15rem;
+  padding-bottom: 0.2rem;
+}
+
+.markdown-report h3 {
+  font-size: 1rem;
+}
+
+.markdown-report p {
+  margin: 0.6rem 0;
+  white-space: pre-wrap;
+}
+
+.markdown-report ul,
+.markdown-report ol {
+  margin: 0.55rem 0 0.8rem;
+  padding-left: 1.3rem;
+}
+
+.markdown-report ul {
+  list-style: disc;
+}
+
+.markdown-report ol {
+  list-style: decimal;
+}
+
+.markdown-report li {
+  margin: 0.25rem 0;
+}
+
+.markdown-report strong {
+  color: #0f172a;
+  font-weight: 700;
+}
+
+.markdown-report code {
+  background: #f3f4f6;
+  border-radius: 0.3rem;
+  font-size: 0.85em;
+  padding: 0.1rem 0.3rem;
+}
+
+.markdown-report pre {
+  background: #111827;
+  border-radius: 0.5rem;
+  color: #f9fafb;
+  margin: 0.7rem 0;
+  overflow-x: auto;
+  padding: 0.75rem;
+}
+
+.markdown-report pre code {
+  background: transparent;
+  color: inherit;
+  padding: 0;
+}