.scrollable-table {
    overflow-x: auto;
    width: 100%;
}

table.progress {
    margin: 1em;
}
table.progress td {
    text-align: center;
    border: 1px solid #000000;
    padding: 0;
    width: 2.2em;
}
table.progress td * {
    display: block;
    border: 2px solid transparent;
    width: 2em;
}
table.progress a {
    color: inherit;
    text-decoration: none;
}
table.progress a:hover {
    border: 2px solid #ff6347;
}

td.open {
    background: lightgrey;
    color: black;
    padding: 0 0.2em;
}
td.completed {
    background: green;
    color: white;
    padding: 0 0.2em;
    font-weight: bold;
}