/* Principia Softwarica - progressive enhancement CSS.
 * The page is fully readable without this stylesheet.
 */

/* Base typography */
body {
  max-width: 40em;
  margin: 2em auto;
  padding: 0 1em;
  font-family: Georgia, "Times New Roman", serif;
  line-height: 1.5;
  color: #222;
  background: #fff;
}

h1, h2, h3 {
  font-family: "Helvetica Neue", Helvetica, Arial, sans-serif;
  line-height: 1.2;
}

h1 {
  font-size: 2em;
  margin-bottom: 0.2em;
}

h1 + p {
  margin-top: 0;
  font-size: 1.1em;
  color: #555;
}

h2 {
  font-size: 1.4em;
  margin-top: 1.5em;
}

h3 {
  font-size: 1.1em;
  margin-top: 1.2em;
}

/* Links */
a {
  color: #0055aa;
}
a:visited {
  color: #553388;
}

/* Lists */
ul {
  padding-left: 1.5em;
}
li {
  margin-bottom: 0.3em;
}

/* Horizontal rules */
hr {
  border: none;
  border-top: 1px solid #ccc;
  margin: 2em 0;
}

/* ASCII art diagrams */
pre {
  font-family: "Courier New", Courier, monospace;
  font-size: 0.85em;
  line-height: 1.3;
  overflow-x: auto;
  background: #f8f8f8;
  padding: 1em;
  border: 1px solid #ddd;
}

/* Tables */
table {
  border-collapse: collapse;
  font-size: 0.95em;
  margin: 1em 0;
}
th, td {
  padding: 0.3em 0.6em;
  border: 1px solid #ccc;
  text-align: left;
}
th {
  background: #f0f0f0;
}
td:nth-child(n+4) {
  text-align: right;
  font-family: "Courier New", Courier, monospace;
}

/* Footer */
body > p:last-child {
  color: #777;
}