button {
    display: inline-block;
    width: 10px;
    height: 15px;
    border: 1px solid black;
    border-radius: 10px;
    cursor: pointer;
    background-color: #000 \9;
    background-color: transparent;
}

button[aria-selected="true"] {
    outline: none;
    background-color: black;
}

button[aria-selected="true"]:focus {
    box-shadow: 0 0 8px black;
}

[role="tabpanel"]{
    height: 350px;
}