diff --git a/style.css b/style.css
new file mode 100644
index 0000000..3e47d6e
--- /dev/null
+++ b/style.css
@@ -0,0 +1,99 @@
+body {
+    font-family: Arial, sans-serif;
+    background-color: #f4f4f4;
+    color: #333;
+    margin: 0;
+    padding: 0;
+    display: flex;
+    justify-content: center;
+    align-items: center;
+    flex-direction: column;
+}
+
+h1,
+h2 {
+    color: #1500ff;
+}
+
+form {
+    background: #fff;
+    padding: 20px;
+    margin-bottom: 20px;
+    box-shadow: 0 2px 4px rgba(0, 0, 0, 0.1);
+    border-radius: 5px;
+    max-width: 900px;
+    width: 100%;
+}
+
+input[type="text"],
+textarea {
+    font-size: 12pt;
+    width: 100%;
+    padding: 10px;
+    margin-bottom: 10px;
+    border: 1px solid #ccc;
+    border-radius: 4px;
+}
+
+button {
+    background: #3498db;
+    color: white;
+    padding: 10px 20px;
+    border: none;
+    border-radius: 5px;
+    cursor: pointer;
+}
+
+button:hover {
+    background: #2980b9;
+}
+
+.annonce {
+    background: #fff;
+    padding: 20px;
+    margin-bottom: 20px;
+    box-shadow: 0 2px 4px rgba(0, 0, 0, 0.1);
+    border-radius: 5px;
+    max-width: 900px;
+    width: 100%;
+}
+
+.annonce small {
+    color: #888;
+}
+/* Bouton haut page */
+/* Effet fluide */
+
+html {
+    scroll-behavior: smooth;
+}
+
+#scrollToTopButton {
+    display: block;
+    z-index: 99;
+    transition:
+        background-color 0.3s,
+        opacity 0.5s,
+        visibility 0.5s;
+    opacity: 0;
+    visibility: hidden;
+    position: fixed;
+    bottom: 20px;
+    right: 30px;
+    border: none;
+    border-radius: 4px;
+    outline: none;
+    width: 50px;
+    height: 50px;
+    padding: 8px;
+    background-color: #333333bf;
+}
+#scrollToTopButton i {
+    color: white;
+}
+#scrollToTopButton:hover,
+#scrollToTopButton:focus,
+#scrollToTopButton:focus-within {
+    cursor: pointer;
+    background-color: #0078b4;
+}