body {
    font-family: Arial, sans-serif;
    background-color: #f4f4f4;
    margin: 0;
    padding: 0;
}

.container {
    max-width: 600px;
    margin: 0 auto;
    padding: 20px;
    background-color: #fff;
    box-shadow: 0 0 10px rgba(0, 0, 0, 0.1);
}

h1 {
    text-align: center;
    margin-bottom: 20px;
}

.input-section, .output-section {
    margin-bottom: 20px;
}

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

button {
    display: block;
    width: 100%;
    padding: 10px;
    background-color: #007BFF;
    color: #fff;
    border: none;
    cursor: pointer;
    margin-bottom: 20px;
}

button:hover {
    background-color: #0056b3;
}