a.hint-static-link {
    cursor: pointer;
}

.hint-static img {
    max-width: 80%;
    /* center img trick */
    display: block;
    margin-left: auto;
    margin-right: auto;
}

.hints > div {
    border: 1px solid gray;
    border-radius: 4px;
    margin-bottom: 0.5em;
    margin-top: 0.5em;
    padding: 0.5em;
}

.hints > div:first-child {
    border: 2px solid black;
}