diff --git a/frontend/css/style.css b/frontend/css/style.css
new file mode 100644
index 0000000..e9d7a65
--- /dev/null
+++ b/frontend/css/style.css
@@ -0,0 +1,21 @@
+/* Style global */
+body {
+  margin: 0;
+  padding: 0;
+  overflow: hidden;
+  background: radial-gradient(circle at center, #1a5c1a 0%, #0d3d0d 100%);
+  font-family: Arial, sans-serif;
+}
+
+/* Brillance subtile */
+body::after {
+  content: '';
+  position: fixed;
+  top: 0;
+  left: 0;
+  width: 100%;
+  height: 100%;
+  background: radial-gradient(ellipse at center, transparent 0%, rgba(0,0,0,0.15) 100%);
+  pointer-events: none;
+  z-index: -1;
+}
diff --git a/index.html b/index.html
index 4832e1f..632cdea 100644
--- a/index.html
+++ b/index.html
@@ -3,14 +3,8 @@
 <head>
   <meta charset="UTF-8">
   <title>Tuto Riichi</title>
+  <link rel="stylesheet" href="frontend/css/style.css">
   <style>
-    body {
-      margin: 0;
-      padding: 0;
-      overflow: hidden;
-      background: #f0f0f0;
-    }
-
     #menu {
       position: relative;
       z-index: 10;
