/* Physics 421 — course site
   Everything here is load-bearing. Anything not in this file is the
   browser's default, on purpose. */

body {
  /* The text column. Larger = wider text, narrower margins.
     44rem tight · 52rem current · 64rem wide · none = edge to edge. */
  max-width: 58rem;
  margin: 0 auto;
  padding: 2rem 1.5rem 5rem;

  font-family: "Iowan Old Style", "Palatino Linotype", Palatino, Georgia, serif;
  line-height: 1.5;
}

/* Lecture screenshots are ~1700px wide; without this they blow the layout
   out to their natural width and the text column drifts off-centre. */
img {
  max-width: 70%;
  height: auto;
  display: block;
  margin: 1.5rem auto;
}

/* A long derivation shouldn't widen the page — let it scroll on its own. */
.math.display {
  overflow-x: auto;
  overflow-y: hidden;
}

/* Hairlines only. Without border-collapse the schedule table gets the
   browser's default embossed 3D borders. */
table {
  border-collapse: collapse;
  margin: 1rem 0;
}

th {
  text-align: left;
  border-bottom: 1px solid #000;
}

th, td {
  padding: .3rem 1.5rem .3rem 0;
  vertical-align: top;
}

.schedule th:first-child,
.schedule td:first-child {
  padding-right: 0.1rem;
}

/* Keep compact calendar dates such as "W Sep 16" on one line. */
.schedule th:nth-child(2),
.schedule td:nth-child(2) {
  white-space: nowrap;
}



/* The course-info table at the top has no header row — keep it flush. */
table:first-of-type td { border: none; }

/* Wide content scrolls rather than forcing the whole page sideways. */
pre, code { overflow-x: auto; max-width: 100%; }

@media print {
  body { max-width: none; padding: 0; }
  a { text-decoration: none; color: inherit; }
  tr { page-break-inside: avoid; }
}