strong, b {
    font-weight: bold !important;
}
h1, h2, h3, h4, h5, h6 {
    font-weight: bold !important;
}

h1 {
    font-size: 2.2em !important;
}

h2 {
    font-size: 1.8em !important;
}

h3 {
    font-size: 1.5em !important;
}