/* Display numbers in nested OLs */
ol {
    counter-reset: item;
}
ol > li {
    counter-increment: item;
}
ol ol > li {
    display: block;
}
ol ol > li:before {
    content: counters(item, ".") ". ";
    margin-left: -20px;
}
.letters {
    counter-set: list;
    counter-reset: list;
}
.letters > li {
    counter-increment: list 1;
}
.letters > li:before {
    content: counter(list, lower-latin) ") ";
}