main > div > table {
    max-width: 90vw;
    min-width: 60vw;
    border: 1px solid #aaa;
    border-radius: .5em;
    align-self: center;
    margin: 2em;
    border-spacing: 0;
    padding: 1em;
}

main > div > table td, main > div > table th {
    text-align: center;
    padding: .5em 1em;
}

main > div > table > thead {
    position: sticky;
    top: 10px;
    background-color: #fff;
    box-shadow: 0 -5px 0 8px #fff;
    z-index: 1;
}

main > div > table > thead > tr > th {
    border-bottom: 2px solid #444;
}

main > div > table > tbody > tr {
    background: #ddd;
}

main > div > table > tbody > tr:nth-of-type(2n+1) {
    background: #fff;
}

main > div > table > tbody > tr:not(:hover):nth-of-type(2n+1) > td:nth-last-of-type(2n+1),
main > div > table > thead > tr > th:nth-last-of-type(2n+1) {
    background: #eee;
}

main > div > table > tbody > tr:hover {
    background: #ccc;
}

main > div > table > tbody > tr > td:last-of-type > button {
    margin: 0 .5rem;
}


main > div > table > thead > tr > td[colspan] {
    background: #f8f8f8;
    margin: 5px;
}

main > div > table > thead > tr > td[colspan] > button {
    width: 80%;
    font-size: 1.25em;
}