.simple-list {
    padding: 0;
    margin: 0;
    list-style: none;
}

.simple-list > li {
    padding: 5px;
    font-size: 1.5rem;
}

.simple-list > li:not(:first-child) {
    border-top: 1px solid lightgrey;
}

.sub-list {
    list-style: none;
}