/* CSS styling */
body {
font-family: Arial, sans-serif;
background-color: #f4f4f4;
margin: 0;
padding: 0;
}
h2 {
text-align: center;
margin-top: 20px;
}
label {
display: block;
margin-bottom: 5px;
}
input[type="text"], input[type="number"], select {
width: 100%;
padding: 10px;
margin-bottom: 10px;
border-radius: 5px;
border: 1px solid #ccc;
box-sizing: border-box;
}
button {
background-color: #4caf50;
color: white;
padding: 10px 20px;
border: none;
border-radius:...
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