Update index.html

public/index.html

@@ -7,7 +7,7 @@
     <style>
       /* Style for the buttons */
       button {
-        background-color: blue;
+        background-color: magenta;
         color: white;
         font-size: 24px;
         padding: 12px 24px;
@@ -19,7 +19,7 @@
       
       /* Style for the logo */
       #logo {
-        float: right;
+        float: center;
         margin-right: 20px;
         margin-top: 20px;
         width: 100px;