styles.css

ul li {
    list-style: none;
    height: 20px;
    margin: 0 auto 2px auto;
    background-color: rgb(127, 255, 0);
    border-radius: 10%;
}

* {
    text-align: center;
    font-family: sans-serif;
}

body {
    background-color: #fafafa;
}