rr/app/static/style.css

@font-face
{
    font-family: STIX;
    src: url("http://127.0.0.1:5000/static/STIX2Text-Regular.woff") format("woff"), 
         url("http://127.0.0.1:5000/static/STIX2Text-Regular.otf") format("truetype");
}

body
{
    display: flex;
    justify-content: center;
}

.page
{
    width: 500px;
}

h1,
h2,
h3
{
    font-family: 'STIX', serif;
    font-weight: normal;
    font-size: 34pt;
    text-align: center;
    border-style: solid;
    border-width: 1px 0;
}