.mp3-converter-form {
    padding: 20px;
    background-color: #f1f1f1;
    border-radius: 5px;
    width: 100%;
    max-width: 500px;
    margin: 0 auto;
}

.mp3-converter-form h2 {
    font-size: 24px;
    margin-bottom: 20px;
}

.mp3-converter-form input[type="file"],
.mp3-converter-form select,
.mp3-converter-form input[type="submit"] {
    width: 100%;
    padding: 10px;
    margin-bottom: 15px;
    border-radius: 5px;
    border: 1px solid #ccc;
}