CSS만 사용하여 원형 번호 배지를 어떻게 만들 수 있나요?

.numberCircle {
    border-radius: 50%;  /* Create a circular shape */
    width: 36px;  /* Set the width */
    height: 36px;  /* Set the height */
    padding: 8px;  /* Provide padding for the text */

    background: #fff;  /* Set a white background */
    border: 2px solid #666;  /* Add a gray border */
    color: #666;  /* Set the font color to gray */
    text-align: center;  /* Center the text horizontally */

    font: 32px Arial, sans-serif;  /* Define the font and size */
}

<div class="numberCircle">30</div>