body {
    font-family: Arial, sans-serif;
}

.container {
    max-width: 500px;
    margin: 0 auto;
    padding: 20px;
}

label {
    display: block;
    margin-bottom: 10px;
}

input[type="text"] {
    width: 100%;
    padding: 5px;
    margin-bottom: 10px;
}

button {
    padding: 10px 20px;
    background-color: #4CAF50;
    color: white;
    border: none;
    cursor: pointer;
}

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