.md-typeset h1,
.md-typeset h2,
.md-typeset h3 {
    font-weight: bold;
}

.md-typeset h1::before {
    content: "";
    display: inline-block;
    width: 12px;
    height: 12px;
    margin-right: 0.5em;
    vertical-align: middle;
    background-color: currentColor;
}

.md-typeset h2::before {
    content: "";
    display: inline-block;
    width: 24px;
    height: 12px;
    margin-right: 0.5em;
    vertical-align: middle;
    background-color: currentColor;
}

.md-typeset h3::before {
    content: "";
    display: inline-block;
    width: 36px;
    height: 12px;
    margin-right: 0.5em;
    vertical-align: middle;
    background-color: currentColor;
}