body { background-color: white; text-color: black }
h1 h2 h3 { font-family: Arial }
h1 { font: bold 20pt/20pt sans-serif; color: black; text-align: left }
h2 { font-size: large; color: purple }
h3 { font-weight: bold; font-size: medium; color: blue }
h4 { color: purple }
.button   { font-family: Arial; font-style: bold; color: blue }
.attop    { vertical-align: top; text-align: justify }
.prompt   { font-weight: bold; color: blue }
.response { font-weight: bold; color: black }