diff --git a/frontend/index.html b/frontend/index.html
index 854efef..e036a97 100644
--- a/frontend/index.html
+++ b/frontend/index.html
@@ -4,7 +4,7 @@
     <meta charset="UTF-8" />
     <link rel="icon" type="image/svg+xml" href="/favicon.svg" />
     <meta name="viewport" content="width=device-width, initial-scale=1.0" />
-    <title>Radar Sargasses 971</title>
+    <title>Radar Sargasses Caraïbes</title>
     <link rel="preconnect" href="https://fonts.googleapis.com">
     <link rel="preconnect" href="https://fonts.gstatic.com" crossorigin>
     <link href="https://fonts.googleapis.com/css2?family=Fredoka+One&family=Fredoka:wght@400;500;600&display=swap" rel="stylesheet">
diff --git a/frontend/public/favicon.svg b/frontend/public/favicon.svg
index 6893eb1..524999c 100644
--- a/frontend/public/favicon.svg
+++ b/frontend/public/favicon.svg
@@ -1 +1,12 @@
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\ No newline at end of file
+<svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 32 32">
+  <circle cx="16" cy="16" r="15" fill="#1a1a2e" stroke="#2563eb" stroke-width="1.5"/>
+  <circle cx="16" cy="16" r="5"  fill="none" stroke="#2563eb" stroke-width="0.8" opacity="0.6"/>
+  <circle cx="16" cy="16" r="9"  fill="none" stroke="#2563eb" stroke-width="0.8" opacity="0.5"/>
+  <circle cx="16" cy="16" r="13" fill="none" stroke="#2563eb" stroke-width="0.8" opacity="0.4"/>
+  <line x1="16" y1="3"  x2="16" y2="29" stroke="#2563eb" stroke-width="0.5" opacity="0.3"/>
+  <line x1="3"  y1="16" x2="29" y2="16" stroke="#2563eb" stroke-width="0.5" opacity="0.3"/>
+  <path d="M16 16 L25 7 A13 13 0 0 0 16 3 Z" fill="#60a5fa" opacity="0.18"/>
+  <line x1="16" y1="16" x2="25" y2="7" stroke="#60a5fa" stroke-width="1.5" stroke-linecap="round"/>
+  <circle cx="22" cy="10" r="1.5" fill="#60a5fa" opacity="0.9"/>
+  <circle cx="16" cy="16" r="1.5" fill="#fff"/>
+</svg>
diff --git a/frontend/src/components/Topbar/Topbar.css b/frontend/src/components/Topbar/Topbar.css
index 219a8ee..7717e27 100644
--- a/frontend/src/components/Topbar/Topbar.css
+++ b/frontend/src/components/Topbar/Topbar.css
@@ -22,10 +22,19 @@
   flex-shrink: 0;
 }
 
-.topbar__logo-img {
-  height: 44px;
-  width: auto;
-  display: block;
+.topbar__brand-icon {
+  width: 28px;
+  height: 28px;
+  flex-shrink: 0;
+}
+
+.topbar__brand-name {
+  font-family: 'Fredoka', sans-serif;
+  font-size: 16px;
+  font-weight: 600;
+  color: #60a5fa;
+  white-space: nowrap;
+  letter-spacing: 0.01em;
 }
 
 /* ── Islands nav ── */
@@ -83,6 +92,7 @@
     justify-content: flex-start;
     padding-bottom: 4px;
   }
-  .topbar__island-btn { padding: 4px 10px; font-size: 12px; }
-  .topbar__logo-img   { height: 38px; }
+  .topbar__island-btn  { padding: 4px 10px; font-size: 12px; }
+  .topbar__brand-name  { font-size: 14px; }
+  .topbar__brand-icon  { width: 24px; height: 24px; }
 }
diff --git a/frontend/src/components/Topbar/Topbar.jsx b/frontend/src/components/Topbar/Topbar.jsx
index 177ab9d..10ce81b 100644
--- a/frontend/src/components/Topbar/Topbar.jsx
+++ b/frontend/src/components/Topbar/Topbar.jsx
@@ -1,5 +1,4 @@
 import TimelineSlider from '../Timeline/TimelineSlider';
-import logoUrl from '../../assets/logo-radarsargasses971.png';
 import './Topbar.css';
 
 const ISLANDS = [
@@ -15,7 +14,19 @@ export default function Topbar({ activeStep, onStepChange, onIslandSelect }) {
   return (
     <header className="topbar">
       <div className="topbar__brand">
-        <img src={logoUrl} alt="Radar Sargasses 971" className="topbar__logo-img" />
+        <svg className="topbar__brand-icon" viewBox="0 0 32 32" xmlns="http://www.w3.org/2000/svg">
+          <circle cx="16" cy="16" r="15" fill="#1a1a2e" stroke="#2563eb" strokeWidth="1.5"/>
+          <circle cx="16" cy="16" r="5"  fill="none" stroke="#2563eb" strokeWidth="0.8" opacity="0.6"/>
+          <circle cx="16" cy="16" r="9"  fill="none" stroke="#2563eb" strokeWidth="0.8" opacity="0.5"/>
+          <circle cx="16" cy="16" r="13" fill="none" stroke="#2563eb" strokeWidth="0.8" opacity="0.4"/>
+          <line x1="16" y1="3"  x2="16" y2="29" stroke="#2563eb" strokeWidth="0.5" opacity="0.3"/>
+          <line x1="3"  y1="16" x2="29" y2="16" stroke="#2563eb" strokeWidth="0.5" opacity="0.3"/>
+          <path d="M16 16 L25 7 A13 13 0 0 0 16 3 Z" fill="#60a5fa" opacity="0.18"/>
+          <line x1="16" y1="16" x2="25" y2="7" stroke="#60a5fa" strokeWidth="1.5" strokeLinecap="round"/>
+          <circle cx="22" cy="10" r="1.5" fill="#60a5fa" opacity="0.9"/>
+          <circle cx="16" cy="16" r="1.5" fill="#fff"/>
+        </svg>
+        <span className="topbar__brand-name">Radar Sargasses Caraïbes</span>
       </div>
 
       <nav className="topbar__islands" aria-label="Navigation par île">