<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <link rel="stylesheet" href="style.css">
    <title>ROI Calculator</title>
</head>
<body>
    <div class="container">
        <h1>ROI Calculator</h1>
        <form id="roiForm">
            <div class="form-group">
                <label for="amountInvested">Amount Invested:</label>
                <input type="number" id="amountInvested" required>
            </d