deCloudflare/tool/md2html/style.css

table {
    border-collapse: collapse;
}

table > thead th {
    border: 1px solid black;
    border-bottom: 2px solid black;
}

td {
    border: 1px solid black;
    padding: 0.8em;
}

img {
    max-width: 100%;
}

summary > * {
    /* 
     * Make summary display on the same line, instead of
     * splitting into multiple lines
     */

    display: inline-flex;
}