body{font-family:Arial,sans-serif;background-color:#f5f5f5;margin:0;padding:0}#investment-form{max-width:800px;margin:20px auto;background-color:#fff;padding:20px;border-radius:5px;box-shadow:0 0 10px rgb(0 0 0 / .1)}.calc-container{display:flex;gap:20px}.calc-container>div{flex:1}h2{color:#333}label{display:block;margin-bottom:5px;color:#555}input[type=number],select{width:calc(100% - 20px);padding:8px;margin-bottom:10px;border:1px solid #ccc;border-radius:3px;box-sizing:border-box}button{padding:10px 20px;background-color:#4caf50;color:#fff;border:none;border-radius:3px;cursor:pointer}button:hover{background-color:#45a049}