h2 {
    counter-reset: h3counter;
}

h3 {
    counter-increment: h3counter;
    counter-reset: h4counter;
}

h4 {
    counter-increment: h4counter;
}

h3::before {
    content: counter(h3counter) ". ";
}

h4::before {
    content: counter(h3counter) "." counter(h4counter) ". ";
}

table {
    width: 100%;
}

td {
    padding: 0 5em;
}

figcaption {
    text-align: center;
    font-style: italic;
    margin-top: 1em;
}