.nbsphinx-gallery > a {
    text-align: center;
    padding: 5px;
    border: 1px solid;
    border-radius: 2px;
    border-color: var(--color-sidebar-background);
    background-color: var(--color-sidebar-background);
}

.nbsphinx-gallery > a:hover {
    border-color: currentColor;
}