diff --git a/client/src/index.css b/client/src/index.css
index f0ec58d..29df178 100644
--- a/client/src/index.css
+++ b/client/src/index.css
@@ -76,7 +76,7 @@ body {
 .elegant-card {
   background: white;
   border: 2px solid #6b7280 !important; /* Bordure bien visible */
-  border-radius: 12px;
+  border-radius: 4px;
   box-shadow: 0 2px 8px rgba(0, 0, 0, 0.08), 0 1px 3px rgba(0, 0, 0, 0.1);
   transition: all 0.2s ease;
 }
@@ -125,7 +125,7 @@ body {
   width: 100%;
   padding: 12px 16px;
   border: 2px solid #4b5563 !important; /* Bordure grise foncée bien visible */
-  border-radius: 8px;
+  border-radius: 4px;
   background: hsl(var(--background));
   color: hsl(var(--foreground));
   font-size: 14px;
@@ -155,7 +155,7 @@ body {
   justify-content: center;
   gap: 8px;
   padding: 12px 24px;
-  border-radius: 8px;
+  border-radius: 4px;
   font-size: 14px;
   font-weight: 500;
   text-decoration: none;
@@ -221,7 +221,7 @@ body {
 .search-container {
   background: white;
   border: 2px solid hsl(var(--primary) / 0.3);
-  border-radius: 12px;
+  border-radius: 4px;
   padding: 20px;
   margin-bottom: 24px;
   box-shadow: 0 4px 12px rgba(0, 0, 0, 0.1);
@@ -241,7 +241,7 @@ body {
   width: 100%;
   padding: 12px 16px;
   border: 2px solid #4b5563 !important; /* Bordure bien visible */
-  border-radius: 8px;
+  border-radius: 4px;
   background: hsl(var(--background));
   color: hsl(var(--foreground));
   font-size: 14px;
@@ -259,7 +259,7 @@ body {
 .filters-container {
   background: hsl(var(--muted) / 0.5);
   border: 2px solid hsl(var(--border));
-  border-radius: 12px;
+  border-radius: 4px;
   padding: 20px;
   margin-bottom: 24px;
   box-shadow: 0 2px 8px rgba(0, 0, 0, 0.05);
@@ -276,7 +276,7 @@ body {
 .modern-table {
   width: 100%;
   border-collapse: collapse;
-  border-radius: 12px;
+  border-radius: 4px;
   overflow: hidden;
   box-shadow: 0 2px 8px rgba(0, 0, 0, 0.04);
 }
@@ -313,7 +313,7 @@ body {
   display: inline-flex;
   align-items: center;
   padding: 4px 12px;
-  border-radius: 6px;
+  border-radius: 2px;
   font-size: 12px;
   font-weight: 500;
   white-space: nowrap;
@@ -356,7 +356,7 @@ body {
   font-weight: 500;
   font-size: 14px;
   cursor: pointer;
-  border-radius: 8px 8px 0 0;
+  border-radius: 4px 4px 0 0;
   transition: all 0.2s ease;
   position: relative;
 }
@@ -403,7 +403,7 @@ body {
 .section-client,
 .section-identity {
   border: none !important; /* Suppression des bordures */
-  border-radius: 12px;
+  border-radius: 4px;
   padding: 24px;
   margin-bottom: 24px;
   box-shadow: 0 2px 8px rgba(0, 0, 0, 0.06);
diff --git a/replit.md b/replit.md
index 46b4a81..f5fda12 100644
--- a/replit.md
+++ b/replit.md
@@ -243,6 +243,9 @@ Preferred communication style: Simple, everyday language.
 - ✅ Added date and time display in sales history with automatic timestamp from database
 - ✅ Harmonized color scheme in new sale form with softer, complementary colors
 - ✅ Updated section backgrounds to work cohesively with green save button
+- ✅ Uniformized export buttons with consistent styling
+- ✅ Applied angular design with reduced border-radius throughout entire application
+- ✅ Modern, crisp appearance with 4px border-radius for cards, inputs, and buttons
 
 ### Docker Configuration & Cleanup (January 9, 2025)
 - ✅ Complete Docker setup optimized for external PostgreSQL database