div.grid-container {
    display: grid;
    grid-template-columns: auto auto auto;
}
div.grid-item {
    border: 2px black solid;
}

a.grid-item {
    text-decoration: none;
    display: contents;
    height: 100%;
    color: black;
}

div.clickable:hover {
    background: lightgrey;
}