body {
   font-family: Arial, sans-serif;
   margin: 0;
   padding: 0;
   text-align: center;
}

h1 {
   margin-top: 20px;
}

form {
   margin-top: 20px;
}

input[type="text"],
input[type="number"],
button {
   margin: 5px;
   padding: 5px;
   border-radius: 5px;
   border: 1px solid #ccc;
}

button {
   cursor: pointer;
}

div {
   margin-top: 20px;
   font-weight: bold;
}