/* S&DS 265 course site.
 *
 * One column, generous measure, a serif face for reading and a sans face for
 * the calendar. Colours are the palette the lecture figures use, so a figure
 * dropped onto a page does not look imported from somewhere else. */

:root {
  --blue:   #00356B;
  --bright: #286DC0;
  --ink:    #202A35;
  --muted:  #66727E;
  --rule:   #D8E0E8;
  --pale:   #F2F6FA;
  --paper:  #FBFBF9;
  --clay:   #B0846F;
  --sage:   #9AAE96;
}

* { box-sizing: border-box; }

html { -webkit-text-size-adjust: 100%; }

body {
  margin: 0;
  background: var(--paper);
  color: var(--ink);
  font: 17px/1.62 Palatino, "Palatino Linotype", "Iowan Old Style", Georgia, serif;
}

/* ---- masthead ---------------------------------------------------------- */

.masthead { border-bottom: 1px solid var(--rule); background: #fff; }

.hero {
  display: block;
  width: 100%;
  max-height: 210px;
  object-fit: cover;
  object-position: center 45%;
}

.masthead-text {
  max-width: 1180px;
  margin: 0 auto;
  padding: 1.1rem 1.5rem 1.4rem;
}

.masthead-text h1 {
  margin: 0;
  font-size: 2.05rem;
  font-weight: 600;
  letter-spacing: -0.01em;
  color: var(--blue);
}

.subtitle { margin: 0.35rem 0 0; color: var(--muted); font-size: 1.02rem; }

/* ---- nav --------------------------------------------------------------- */

.nav { margin: 0.7rem 0 0; font-size: 0.95rem; }

.nav a {
  display: inline-block;
  margin-right: 1.3rem;
  padding-bottom: 0.12rem;
  border-bottom: 2px solid transparent;
  color: var(--blue);
}

.nav a:hover { border-bottom-color: var(--bright); text-decoration: none; }

/* ---- body -------------------------------------------------------------- */

main { max-width: 1180px; margin: 0 auto; padding: 2.1rem 1.5rem 3rem; }

h2 {
  margin: 2.4rem 0 0.7rem;
  font-size: 1.42rem;
  font-weight: 600;
  color: var(--blue);
  border-bottom: 1px solid var(--rule);
  padding-bottom: 0.32rem;
}

h2:first-of-type { margin-top: 0; }

p { margin: 0.75rem 0; max-width: 58rem; }

a { color: var(--bright); text-decoration: none; }
a:hover { text-decoration: underline; }

.lede { font-size: 1.06rem; }

.note {
  background: var(--pale);
  border-left: 3px solid var(--blue);
  padding: 0.85rem 1.1rem;
  margin: 1.3rem 0;
  max-width: 58rem;
}

.note p { margin: 0.3rem 0; }

/* ---- calendar ---------------------------------------------------------- */

.calendar-wrap { overflow-x: auto; margin-top: 0.9rem; }

table.calendar {
  border-collapse: collapse;
  width: 100%;
  min-width: 900px;
  font: 14.5px/1.42 "Helvetica Neue", Helvetica, Arial, sans-serif;
}

table.calendar th {
  text-align: left;
  font-weight: 600;
  color: var(--blue);
  border-bottom: 2px solid var(--blue);
  padding: 0.4rem 0.7rem;
  white-space: nowrap;
}

table.calendar td {
  vertical-align: middle;
  padding: 0.34rem 0.7rem;
  border-bottom: 1px solid var(--rule);
}

table.calendar tr:nth-child(even) td { background: #F7F9FB; }

td.when   { white-space: nowrap; color: var(--muted); width: 6.6rem;
            line-height: 1.24; padding-top: 0.42rem; padding-bottom: 0.42rem; }
td.when b { color: var(--ink); font-weight: 600; }
td.topic  { min-width: 15rem; }
tr.recess td {
  background: #FDF6F2 !important;
  color: var(--clay);
  font-style: italic;
}

tr.exam td.topic { color: var(--clay); font-weight: 600; }

.demo { display: block; margin: 0.08rem 0; }
.demo img { vertical-align: -6px; margin-right: 0.32rem; }

/* ---- footer ------------------------------------------------------------ */

footer {
  border-top: 1px solid var(--rule);
  margin-top: 2.5rem;
  padding: 1.3rem 1.5rem 2.4rem;
  color: var(--muted);
  font-size: 0.88rem;
}

footer p { max-width: 1180px; margin: 0 auto; }

@media (max-width: 720px) {
  body { font-size: 16px; }
  .hero { max-height: 130px; }
  .masthead-text h1 { font-size: 1.5rem; }
}


/* ---- syllabus page ----------------------------------------------------- */

main h3 {
  margin: 1.6rem 0 0.4rem;
  font-size: 1.08rem;
  font-weight: 600;
  color: var(--ink);
}

main blockquote {
  margin: 1.2rem 0;
  padding: 0.15rem 0 0.15rem 1.1rem;
  border-left: 3px solid var(--rule);
  color: var(--muted);
  max-width: 58rem;
}

main table:not(.calendar) {
  border-collapse: collapse;
  margin: 1.1rem 0;
  font-size: 0.95rem;
  max-width: 58rem;
}

main table:not(.calendar) th,
main table:not(.calendar) td {
  text-align: left;
  padding: 0.42rem 0.9rem 0.42rem 0;
  border-bottom: 1px solid var(--rule);
  vertical-align: top;
}

main table:not(.calendar) th { color: var(--blue); font-weight: 600; }

main ul, main ol { max-width: 58rem; padding-left: 1.25rem; }
main li { margin: 0.3rem 0; }

main code {
  background: var(--pale);
  padding: 0.08em 0.32em;
  border-radius: 3px;
  font-size: 0.9em;
}

main hr { border: 0; border-top: 1px solid var(--rule); margin: 2.2rem 0; }

/* Slides and notes links: the icon carries the file type, the word carries
   the meaning, so neither has to be guessed from a small glyph. */
.filelink { display: inline-flex; align-items: center; gap: 0.32rem; white-space: nowrap; }
.filelink img { vertical-align: middle; }