/* CSS styles */
}
.container {
max-width: 600px;
margin: 50px auto;
padding: 20px;
background-color: #fff;
border-radius: 8px;
box-shadow: 0 0 10px rgba(0, 0, 0, 0.1);
}
h1 {
text-align: center;
margin-bottom: 20px;
color: #333;
}
label {
display: block;
margin-bottom: 5px;
font-weight: bold;
}
input[type="number"] {
width: 100%;
padding: 10px;
font-size: 16px;
margin-bottom:...
