body {
    position: relative;
    width: 800px;
    margin-left: auto;
    margin-right: auto;
    
    font-family: arial, sans-serif;
    font-size: 10pt;
}

h1 {
    font-size: 18pt;
}

h2 {
    font-size: 14pt;
}

h3 {
    font-size: 12pt;
}

.small {
    font-size: 8pt;
}

.centered {
    display: block; 
    margin-left: auto;
    margin-right: auto;
}