diff --git a/calculator/cs.css b/calculator/cs.css
index 45ba1d2..fb055f0 100644
--- a/calculator/cs.css
+++ b/calculator/cs.css
@@ -4,7 +4,7 @@
   font-size:22px;
   margin:0.5px -1.5px 0.5px -1.5px;
   padding:0px 0px 0px 0px;
-  border-radius: 1%;
+  border-radius: 2%;
 }
 
 #out{
diff --git a/calculator/index.html b/calculator/index.html
index c914d6c..0ca2a39 100644
--- a/calculator/index.html
+++ b/calculator/index.html
@@ -9,7 +9,7 @@
     <meta name="viewport" content="width=device-width,initial-scale=1.0">
     <title>Calculate</title>
   </head>
-  <body style="background-color:gray;">
+  <body style="background-color:black;">
     <div id='every'>
     <div class="container">
       <div id='n'>
