diff --git a/app/src/components/AuditPanel.tsx b/app/src/components/AuditPanel.tsx
index c7c949f..2357946 100644
--- a/app/src/components/AuditPanel.tsx
+++ b/app/src/components/AuditPanel.tsx
@@ -11,7 +11,7 @@ import {
   SelectValue,
 } from '@/components/ui/select';
 import { Play, FileDown, Loader2, AlertCircle } from 'lucide-react';
-import type { AuditConfig, AuditScenario, ScenarioResult, AuditReport, ModuleType } from '@/lib/audit/types';
+import type { AuditConfig, AuditScenario, ScenarioResult, AuditReport } from '@/lib/audit/types';
 import { MODULE_LABELS } from '@/lib/audit/types';
 import { generateAllScenarios } from '@/lib/audit/scenarios';
 import AuditDetailPopup from './AuditDetailPopup';
diff --git a/app/src/lib/audit/export-audit-pdf.tsx b/app/src/lib/audit/export-audit-pdf.tsx
index 9deb514..f0637dd 100644
--- a/app/src/lib/audit/export-audit-pdf.tsx
+++ b/app/src/lib/audit/export-audit-pdf.tsx
@@ -65,6 +65,33 @@ function statusColor(s: CheckStatus): string {
   }
 }
 
+function sanitizeForPDF(text: string | undefined): string {
+  if (!text) return '';
+  return text
+    .replace(/φ/g, 'phi')
+    .replace(/ϕ/g, 'phi')
+    .replace(/α/g, 'alpha')
+    .replace(/θ/g, 'theta')
+    .replace(/β/g, 'beta')
+    .replace(/γ/g, 'gamma')
+    .replace(/Δ/g, 'Delta')
+    .replace(/—/g, '-')
+    .replace(/–/g, '-')
+    .replace(/“/g, '"')
+    .replace(/”/g, '"')
+    .replace(/‘/g, "'")
+    .replace(/’/g, "'")
+    .replace(/Æ/g, 'phi') // Fix specifically the one seen in user screenshot
+    .replace(/≤/g, '<=')
+    .replace(/≥/g, '>=')
+    .replace(/≈/g, '~')
+    .replace(/×/g, 'x')
+    .replace(/÷/g, '/')
+    .replace(/²/g, '^2')
+    .replace(/³/g, '^3')
+    .replace(/°/g, ' deg');
+}
+
 interface ReportPDFProps {
   report: AuditReport;
 }
@@ -119,27 +146,27 @@ function AuditReportDocument({ report }: ReportPDFProps) {
               return (
               <View key={sc.scenarioId} style={styles.scenarioItem}>
                 <Text style={styles.scenarioId}>
-                  {sc.scenarioId} — {sc.verdict === 'PASS' ? '✓' : sc.verdict === 'WARN' ? '⚠' : '✗'} {summaryTranslated}
+                  {sanitizeForPDF(sc.scenarioId)} — {sc.verdict === 'PASS' ? '✓' : sc.verdict === 'WARN' ? '⚠' : '✗'} {sanitizeForPDF(summaryTranslated)}
                 </Text>
                 {sc.enunciado_problema && (
-                  <Text style={{ fontSize: 8, color: '#444', marginBottom: 2 }}>Enunciado: {sc.enunciado_problema}</Text>
+                  <Text style={{ fontSize: 8, color: '#444', marginBottom: 2 }}>Enunciado: {sanitizeForPDF(sc.enunciado_problema)}</Text>
                 )}
                 {sc.tabelas_nbr_consultadas && (
-                  <Text style={{ fontSize: 8, color: '#444', marginBottom: 2 }}>Tabelas: {sc.tabelas_nbr_consultadas}</Text>
+                  <Text style={{ fontSize: 8, color: '#444', marginBottom: 2 }}>Tabelas: {sanitizeForPDF(sc.tabelas_nbr_consultadas)}</Text>
                 )}
                 {sc.resultado_app && (
-                  <Text style={{ fontSize: 8, color: '#444', marginBottom: 2 }}>Avaliação do App: {sc.resultado_app}</Text>
+                  <Text style={{ fontSize: 8, color: '#444', marginBottom: 2 }}>Avaliação do App: {sanitizeForPDF(sc.resultado_app)}</Text>
                 )}
                 {sc.calculation_steps && (
                   <Text style={{ fontSize: 8, color: '#444', marginBottom: 4, fontStyle: 'italic' }}>
-                    CoT: {sc.calculation_steps.substring(0, 300)}{sc.calculation_steps.length > 300 ? '...' : ''}
+                    CoT: {sanitizeForPDF(sc.calculation_steps.substring(0, 300))}{sc.calculation_steps.length > 300 ? '...' : ''}
                   </Text>
                 )}
                 {sc.checks.map((chk, i) => (
                   <View key={i} style={styles.checkRow}>
                     <Text style={[styles.statusBadge, { color: statusColor(chk.status) }]}>{chk.status}</Text>
-                    <Text style={styles.checkLabel}>{chk.name}</Text>
-                    <Text style={styles.checkValue}>{chk.actual} ({chk.expected})</Text>
+                    <Text style={styles.checkLabel}>{sanitizeForPDF(chk.name)}</Text>
+                    <Text style={styles.checkValue}>{sanitizeForPDF(chk.actual)} ({sanitizeForPDF(chk.expected)})</Text>
                   </View>
                 ))}
               </View>
diff --git a/app/src/lib/audit/runner.ts b/app/src/lib/audit/runner.ts
index c840979..7daadcc 100644
--- a/app/src/lib/audit/runner.ts
+++ b/app/src/lib/audit/runner.ts
@@ -185,7 +185,7 @@ async function callOpenRouter(
   onProgress?: (msg: string) => void,
   signal?: AbortSignal,
 ): Promise<string> {
-  onProgress?.('Enviando para OpenRouter...');
+  onProgress?.('Enviando para OpenRouter (streaming)...');
   let url = config.baseUrl || 'https://openrouter.ai/api/v1/chat/completions';
   if (config.baseUrl && !config.baseUrl.includes('/chat/completions')) {
     url = config.baseUrl.replace(/\/$/, '') + '/chat/completions';
@@ -197,6 +197,7 @@ async function callOpenRouter(
       { role: 'user' as const, content: userPrompt },
     ],
     temperature: 0,
+    stream: true,
   };
   const response = await fetchWithTimeout(url, {
     method: 'POST',
@@ -208,15 +209,43 @@ async function callOpenRouter(
     },
     body: JSON.stringify(body),
   }, 600000, signal);
+  
   if (!response.ok) {
     const errText = await response.text();
     throw new Error(`OpenRouter HTTP ${response.status}: ${errText}`);
   }
-  const data = await response.json() as { choices?: { message?: { content?: string } }[]; error?: { message?: string } };
-  if (data.error) throw new Error(`OpenRouter error: ${data.error.message}`);
-  const content = data.choices?.[0]?.message?.content;
-  if (!content) throw new Error('OpenRouter returned empty response');
-  return content;
+  
+  if (!response.body) throw new Error('OpenRouter response body is null');
+  
+  const reader = response.body.getReader();
+  const decoder = new TextDecoder('utf-8');
+  let fullText = '';
+  let buffer = '';
+  
+  while (true) {
+    const { done, value } = await reader.read();
+    if (done) break;
+    buffer += decoder.decode(value, { stream: true });
+    const lines = buffer.split('\n');
+    buffer = lines.pop() || '';
+    for (const rawLine of lines) {
+      const line = rawLine.trim();
+      if (!line.startsWith('data: ')) continue;
+      const jsonStr = line.replace(/^data: /, '').trim();
+      if (jsonStr === '[DONE]') continue;
+      try {
+        const parsed = JSON.parse(jsonStr);
+        // OpenRouter typically sends reasoning tokens or content in delta
+        const delta = parsed.choices?.[0]?.delta;
+        if (delta?.content) fullText += delta.content;
+      } catch (e) {
+        // ignore incomplete JSON
+      }
+    }
+  }
+  
+  if (!fullText) throw new Error('OpenRouter returned empty streaming response');
+  return fullText;
 }
 
 async function callOllama(
@@ -292,6 +321,10 @@ export async function runAudit(
       } catch (e) {
         chunkError = e instanceof Error ? e : new Error(String(e));
         console.warn(`Erro no chunk ${i} (tentativa ${retry}):`, chunkError);
+        if (retry < maxRetriesPerChunk) {
+          // Backoff de 3 segundos antes da próxima tentativa
+          await new Promise(r => setTimeout(r, 3000));
+        }
       }
     }
     
diff --git a/app/src/pages/CertificatePage.tsx b/app/src/pages/CertificatePage.tsx
index 2776333..70a47fb 100644
--- a/app/src/pages/CertificatePage.tsx
+++ b/app/src/pages/CertificatePage.tsx
@@ -1,8 +1,7 @@
 import { useState } from 'react';
-import { ShieldCheck, FileText, CheckCircle2, ChevronRight, Download, Bot, FileCheck, X } from 'lucide-react';
-import { Card, CardContent, CardHeader, CardTitle, CardDescription } from '@/components/ui/card';
+import { ShieldCheck, FileText, CheckCircle2, Download, Bot, FileCheck } from 'lucide-react';
+import { Card, CardContent, CardTitle, CardDescription } from '@/components/ui/card';
 import { Button } from '@/components/ui/button';
-import { Badge } from '@/components/ui/badge';
 import { Dialog, DialogContent, DialogHeader, DialogTitle, DialogDescription, DialogClose } from '@/components/ui/dialog';
 
 const rawLaudos = import.meta.glob('/public/laudos/*.pdf', { eager: true, query: '?url', import: 'default' });