body {
    padding-top: 3rem;
    padding-bottom: 3rem;
    color: #5a5a5a;
}

main {
    margin-top: 3em;
}

footer {
    margin-top: 2em;
}

.card-header[data-toggle='collapse']{
    cursor: pointer;
}

th.sorted.ascending:after {
    content: "  \2191";
}

th.sorted.descending:after {
    content: " \2193";
}

table thead th {
     -webkit-user-select: none;
    -khtml-user-select: none;
    -moz-user-select: none;
    -o-user-select: none;
    user-select: none;
}