diff --git a/index.html b/index.html
new file mode 100644
index 0000000000000000000000000000000000000000..99c0e02b7daac29770d3cf29214713ea76571ce9
--- /dev/null
+++ b/index.html
@@ -0,0 +1,113 @@
+<!DOCTYPE html>
+<html lang="fr">
+<head>
+    <meta charset="UTF-8">
+    <meta name="viewport" content="width=device-width, initial-scale=1.0">
+    <title>Ontologie DQA</title>
+    <style>
+        :root {
+            --bg-color: #ffffff;
+            --text-color: #333;
+            --btn-bg: #007bff;
+            --btn-hover: #0056b3;
+        }
+
+        body.dark-mode {
+            --bg-color: #1e1e1e;
+            --text-color: #f1f1f1;
+            --btn-bg: #17a2b8;
+            --btn-hover: #117a8b;
+        }
+
+        body {
+            font-family: Arial, sans-serif;
+            background-color: var(--bg-color);
+            color: var(--text-color);
+            text-align: center;
+            padding: 20px;
+            transition: background 0.3s, color 0.3s;
+        }
+
+        h1 {
+            font-size: 2em;
+        }
+
+        p {
+            font-size: 1.2em;
+        }
+
+        .button {
+            display: inline-block;
+            margin: 10px;
+            padding: 10px 20px;
+            font-size: 1em;
+            color: white;
+            background-color: var(--btn-bg);
+            border: none;
+            border-radius: 5px;
+            cursor: pointer;
+            transition: background 0.3s;
+        }
+
+        .button:hover {
+            background-color: var(--btn-hover);
+        }
+
+        #toggle-mode {
+            position: absolute;
+            top: 10px;
+            right: 10px;
+            background: none;
+            border: none;
+            cursor: pointer;
+            font-size: 1.5em;
+        }
+
+        .copy-message {
+            display: none;
+            color: green;
+            font-size: 0.9em;
+            margin-top: 10px;
+        }
+    </style>
+</head>
+<body>
+
+    <button id="toggle-mode">🌙</button>
+
+    <h1>Ontologie DQA</h1>
+    <p>Bienvenue sur la page de l'ontologie <strong>DQA</strong>, dédiée à l'évaluation de la qualité des données.</p>
+
+    <button class="button" onclick="downloadOntology()">📥 Télécharger l'ontologie</button>
+    <button class="button" onclick="redirectToOntology()">🔗 Accéder à l'ontologie</button>
+    <button class="button" onclick="copyToClipboard()">📋 Copier le lien</button>
+
+    <p class="copy-message" id="copy-message">✅ Lien copié dans le presse-papiers !</p>
+
+    <script>
+        function downloadOntology() {
+            window.location.href = "dqa.rdf";
+        }
+
+        function redirectToOntology() {
+            window.open("dqa.rdf", "_blank");
+        }
+
+        function copyToClipboard() {
+            const url = window.location.href + "dqa.rdf";
+            navigator.clipboard.writeText(url).then(() => {
+                document.getElementById("copy-message").style.display = "block";
+                setTimeout(() => {
+                    document.getElementById("copy-message").style.display = "none";
+                }, 2000);
+            });
+        }
+
+        document.getElementById("toggle-mode").addEventListener("click", function() {
+            document.body.classList.toggle("dark-mode");
+            this.textContent = document.body.classList.contains("dark-mode") ? "☀️" : "🌙";
+        });
+    </script>
+
+</body>
+</html>