*
{
  line-height: 2em;
}

body
{
  margin: 2em;
}

h1
{
  text-align: center;
  font-size: 2em;
  font-weight: bold;
  border-top: double;
  border-bottom: double;
}

h2
{
  text-align: center;
  font-size: 1.5em;
  font-weight: normal;
}

p.c
{
  text-align: center;
}

p.m
{
  text-indent: 1em;
}

pre
{
  font-size: 1em;
  font-weight: normal;
}