/* PLSC 340 course site — one stylesheet, no build step, no external fonts. */

:root {
  --bg: #fbfaf8;
  --surface: #ffffff;
  --ink: #1b1a18;
  --ink-soft: #55514c;
  --ink-faint: #837d76;
  --rule: #e3ded7;
  --rule-strong: #cec7bd;
  --accent: #7a2c1f;      /* Illinois-ish brick, dulled for long reading */
  --accent-soft: #f4e9e5;
  --highlight: #fff6da;
  --radius: 10px;
  --measure: 68ch;
  color-scheme: light;
}

/* The site follows the reader's system setting; there is no theme toggle. */
@media (prefers-color-scheme: dark) {
  :root {
    --bg: #16151a;
    --surface: #1e1d23;
    --ink: #eceaf0;
    --ink-soft: #b7b2be;
    --ink-faint: #8a8593;
    --rule: #322f3a;
    --rule-strong: #464150;
    --accent: #e8927f;
    --accent-soft: #2c2029;
    --highlight: #3a3320;
    color-scheme: dark;
  }
}

* { box-sizing: border-box; }

body {
  margin: 0;
  background: var(--bg);
  color: var(--ink);
  font: 17px/1.65 ui-serif, Georgia, "Iowan Old Style", "Times New Roman", serif;
  -webkit-text-size-adjust: 100%;
}

.wrap {
  width: min(1080px, 100% - 2.5rem);
  margin-inline: auto;
}

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

header.site {
  border-bottom: 1px solid var(--rule);
  background: var(--surface);
  position: sticky;
  top: 0;
  z-index: 10;
}

header.site .wrap {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem 1.75rem;
  align-items: baseline;
  padding: 0.85rem 0;
}

.brand {
  text-decoration: none;
  color: inherit;
  display: flex;
  align-items: baseline;
  gap: 0.6rem;
}

.brand .code {
  font: 600 0.82rem/1 ui-sans-serif, system-ui, sans-serif;
  letter-spacing: 0.09em;
  text-transform: uppercase;
  white-space: nowrap;
  color: var(--accent);
}

.brand .name {
  font-size: 0.95rem;
  color: var(--ink-soft);
}

header.site nav {
  margin-left: auto;
  display: flex;
  flex-wrap: wrap;
  gap: 1.1rem;
  font: 0.86rem/1 ui-sans-serif, system-ui, sans-serif;
}

header.site nav a {
  color: var(--ink-soft);
  text-decoration: none;
  padding-bottom: 2px;
  border-bottom: 2px solid transparent;
}

header.site nav a:hover { color: var(--ink); }
header.site nav a.active { color: var(--ink); border-bottom-color: var(--accent); }

.banner {
  background: var(--accent);
  color: #fff;
  text-align: center;
  padding: 0.4rem;
  font: 0.8rem/1.3 ui-sans-serif, system-ui, sans-serif;
}

/* ---------- type ---------- */

main.wrap { padding: 2.5rem 0 4rem; }

h1 {
  font-size: clamp(1.85rem, 1.2rem + 2vw, 2.6rem);
  line-height: 1.15;
  margin: 0 0 0.75rem;
  letter-spacing: -0.015em;
}

h2 { font-size: 1.3rem; line-height: 1.25; margin: 0 0 0.75rem; }
h3 { font-size: 1.15rem; line-height: 1.3; margin: 0 0 0.4rem; }
h4 {
  font: 600 0.78rem/1.3 ui-sans-serif, system-ui, sans-serif;
  letter-spacing: 0.07em;
  text-transform: uppercase;
  color: var(--ink-faint);
  margin: 1.4rem 0 0.5rem;
}

p { margin: 0 0 0.9rem; }
a { color: var(--accent); text-underline-offset: 2px; }

.eyebrow {
  font: 600 0.75rem/1.3 ui-sans-serif, system-ui, sans-serif;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--ink-faint);
  margin: 0 0 0.35rem;
}

.lede {
  font-size: 1.08rem;
  color: var(--ink-soft);
  max-width: var(--measure);
}

.fine {
  font: 0.84rem/1.55 ui-sans-serif, system-ui, sans-serif;
  color: var(--ink-faint);
}

/* ---------- layout blocks ---------- */

.hero { margin-bottom: 2rem; }

.card {
  background: var(--surface);
  border: 1px solid var(--rule);
  border-radius: var(--radius);
  padding: 1.5rem 1.6rem;
  margin: 0 0 1.25rem;
}

.cols {
  display: grid;
  gap: 1.25rem;
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
}

.cols.syllabus { grid-template-columns: minmax(200px, 250px) 1fr; align-items: start; }

@media (max-width: 800px) {
  .cols.syllabus { grid-template-columns: 1fr; }
}

.actions { display: flex; flex-wrap: wrap; gap: 0.6rem; margin-top: 1.25rem; }

.btn {
  display: inline-block;
  padding: 0.5rem 1rem;
  border: 1px solid var(--rule-strong);
  border-radius: 999px;
  background: var(--surface);
  color: var(--ink);
  text-decoration: none;
  font: 0.88rem/1.3 ui-sans-serif, system-ui, sans-serif;
}

.btn:hover { border-color: var(--accent); color: var(--accent); }
.btn.primary { background: var(--accent); border-color: var(--accent); color: #fff; }
.btn.primary:hover { filter: brightness(1.12); color: #fff; }

/* ---------- key/value + lists ---------- */

dl.facts { margin: 0; display: grid; gap: 0.7rem; }
dl.facts div { display: grid; grid-template-columns: 8.5rem 1fr; gap: 0.5rem; }
dl.facts dt {
  font: 600 0.78rem/1.6 ui-sans-serif, system-ui, sans-serif;
  letter-spacing: 0.05em;
  text-transform: uppercase;
  color: var(--ink-faint);
}
dl.facts dd { margin: 0; }

ul.grading { list-style: none; margin: 0; padding: 0; display: grid; gap: 0.85rem; }
ul.grading li { display: grid; grid-template-columns: 3.5rem 1fr; gap: 0.75rem; }
.weight {
  font: 600 1.05rem/1.4 ui-sans-serif, system-ui, sans-serif;
  color: var(--accent);
}

ul.links { margin: 0; padding-left: 1.15rem; }
ul.links li { margin-bottom: 0.4rem; }

ol.rubric { margin: 0; padding-left: 1.25rem; }
ol.rubric li { margin-bottom: 0.5rem; }

ol.upcoming { list-style: none; margin: 0; padding: 0; }
ol.upcoming li + li { border-top: 1px solid var(--rule); }
ol.upcoming a {
  display: grid;
  grid-template-columns: 5.5rem 1fr auto;
  gap: 1rem;
  align-items: baseline;
  padding: 0.6rem 0.5rem;
  margin-inline: -0.5rem;
  border-radius: 6px;
  text-decoration: none;
  color: inherit;
}
ol.upcoming a:hover { background: var(--accent-soft); }
ol.upcoming .wk {
  font: 600 0.76rem/1.6 ui-sans-serif, system-ui, sans-serif;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  color: var(--ink-faint);
}
ol.upcoming .dt { font: 0.84rem/1.6 ui-sans-serif, system-ui, sans-serif; color: var(--ink-faint); }

@media (max-width: 620px) {
  ol.upcoming a { grid-template-columns: 1fr; gap: 0.15rem; }
  dl.facts div { grid-template-columns: 1fr; gap: 0; }
}

/* ---------- tables ---------- */

.table-scroll { overflow-x: auto; margin: 0 0 1rem; }

table.schedule {
  border-collapse: collapse;
  width: 100%;
  min-width: 720px;
  font: 0.9rem/1.5 ui-sans-serif, system-ui, sans-serif;
}

table.schedule th,
table.schedule td {
  text-align: left;
  vertical-align: top;
  padding: 0.6rem 0.7rem;
  border-bottom: 1px solid var(--rule);
}

table.schedule thead th {
  font: 600 0.74rem/1.3 ui-sans-serif, system-ui, sans-serif;
  letter-spacing: 0.07em;
  text-transform: uppercase;
  color: var(--ink-faint);
  border-bottom: 1px solid var(--rule-strong);
  white-space: nowrap;
}

table.schedule td.num { color: var(--ink-faint); white-space: nowrap; }
table.schedule td.dates { white-space: nowrap; }
table.schedule tbody tr:hover { background: var(--accent-soft); }

/* ---------- week cards ---------- */

.week { scroll-margin-top: 5rem; }
.week-head { margin-bottom: 1rem; }

.badge {
  display: inline-block;
  margin-top: 0.4rem;
  padding: 0.15rem 0.6rem;
  border-radius: 999px;
  background: var(--accent-soft);
  color: var(--accent);
  font: 600 0.75rem/1.6 ui-sans-serif, system-ui, sans-serif;
}

/* the current week, marked by site.js */
.is-now {
  border-color: var(--accent);
  box-shadow: 0 0 0 3px var(--accent-soft);
}

tr.is-now td { background: var(--highlight); }

/* ---------- prose (syllabus + week detail) ---------- */

.prose { max-width: var(--measure); }
.prose h2 { margin-top: 2.2rem; padding-top: 1.2rem; border-top: 1px solid var(--rule); }
.prose h3 { margin-top: 1.8rem; }
.prose ul, .prose ol { padding-left: 1.3rem; }
.prose li { margin-bottom: 0.45rem; }
.prose em { color: var(--ink-soft); }
.prose del { color: var(--ink-faint); }
.prose blockquote {
  margin: 1rem 0;
  padding-left: 1rem;
  border-left: 3px solid var(--rule-strong);
  color: var(--ink-soft);
}
.prose table {
  border-collapse: collapse;
  width: 100%;
  font: 0.88rem/1.5 ui-sans-serif, system-ui, sans-serif;
  display: block;
  overflow-x: auto;
}
.prose th, .prose td {
  text-align: left;
  vertical-align: top;
  padding: 0.5rem 0.6rem;
  border-bottom: 1px solid var(--rule);
}
.prose code {
  font-size: 0.88em;
  background: var(--accent-soft);
  padding: 0.1em 0.35em;
  border-radius: 4px;
}
.prose hr { border: 0; border-top: 1px solid var(--rule); margin: 2rem 0; }

/* ---------- syllabus table of contents ---------- */

.toc { position: sticky; top: 5rem; font: 0.86rem/1.5 ui-sans-serif, system-ui, sans-serif; }
.toc ul { list-style: none; margin: 0; padding: 0; }
.toc ul ul { display: none; }
.toc li { margin-bottom: 0.4rem; }
.toc a { color: var(--ink-soft); text-decoration: none; }
.toc a:hover { color: var(--accent); }

@media (max-width: 800px) {
  .toc { position: static; }
}

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

footer.site {
  border-top: 1px solid var(--rule);
  padding: 1.75rem 0 3rem;
  font: 0.88rem/1.6 ui-sans-serif, system-ui, sans-serif;
  color: var(--ink-soft);
}

footer.site p { margin: 0 0 0.4rem; max-width: var(--measure); }

@media print {
  header.site, footer.site, .actions, .toc, .banner { display: none; }
  .card { border: 0; padding: 0; }
  body { background: #fff; font-size: 11pt; }
}

.prose dl.facts {
  margin-bottom: 1.75rem;
  padding-bottom: 1.5rem;
  border-bottom: 1px solid var(--rule);
}