/* ===========================================================================
   Palette. Warm neutral ground, deep slate ink, two earth accents.
   Metadata is set in mono; prose in sans.
   =========================================================================== */
:root {
  --paper:   #faf8f4;
  --card:    #ffffff;
  --ink:     #1f2328;
  --body:    #3f464f;
  --mute:    #7d848d;
  --faint:   #a8aeb6;
  --rule:    #e6e2da;
  --rule-2:  #efece5;

  --clay:    #a05a3c;   /* readings, primary accent */
  --moss:    #5f7256;   /* slides */
  --slate:   #46586e;   /* structural, links */
  --sand:    #c9a227;   /* response-due */

  --mono: ui-monospace, SFMono-Regular, "SF Mono", Menlo, Consolas, monospace;
  --sans: -apple-system, BlinkMacSystemFont, "Segoe UI", Inter, Helvetica, Arial, sans-serif;
}

* { box-sizing: border-box; }

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

body {
  margin: 0;
  padding: 0 1.5rem 6rem;
  font: 16.5px/1.6 var(--sans);
  color: var(--body);
  background: var(--paper);
  -webkit-font-smoothing: antialiased;
}

.wrap { max-width: 52rem; margin: 0 auto; }

a { color: var(--slate); text-decoration: none; border-bottom: 1px solid #cfd6de; }
a:hover { border-bottom-color: var(--slate); }

svg.ic { width: 11px; height: 11px; fill: none; stroke: currentColor;
         stroke-width: 1.6; vertical-align: -1px; margin-right: 0.38em; }

/* ---------------------------------------------------------------- masthead */
header { padding: 3.25rem 0 0; }

.eyebrow {
  font: 600 0.72rem/1 var(--mono);
  letter-spacing: 0.16em; text-transform: uppercase;
  color: var(--clay); margin: 0 0 0.85rem;
}

h1 {
  margin: 0; font-size: 1.95rem; line-height: 1.18; font-weight: 600;
  color: var(--ink); letter-spacing: -0.018em;
}

.sub {
  margin: 0.45rem 0 0; font: 0.9rem/1.5 var(--mono);
  color: var(--mute); letter-spacing: 0.01em;
}

.docs { margin: 1.5rem 0 0; display: flex; flex-wrap: wrap; gap: 0.5rem; }
.docs a {
  font: 500 0.83rem/1 var(--mono); letter-spacing: 0.01em;
  border: 1px solid var(--rule); border-radius: 4px;
  padding: 0.55rem 0.85rem; background: var(--card); color: var(--body);
  display: inline-flex; align-items: center;
}
.docs a:hover { border-color: var(--slate); color: var(--slate); }

/* ------------------------------------------------------- course info panel */
.info {
  margin: 1.75rem 0 0; border: 1px solid var(--rule);
  border-radius: 5px; background: var(--card);
}
.info > summary {
  cursor: pointer; list-style: none; padding: 0.8rem 1rem;
  font: 600 0.73rem/1 var(--mono); letter-spacing: 0.13em; text-transform: uppercase;
  color: var(--mute); display: flex; align-items: center;
}
.info > summary::-webkit-details-marker { display: none; }
.info > summary::after {
  content: "+"; margin-left: auto; font-size: 1rem; color: var(--faint);
  line-height: 1;
}
.info[open] > summary::after { content: "–"; }
.info > summary:hover { color: var(--ink); }
.info .panel { padding: 0 1rem 1.15rem; }

dl.facts { margin: 0; display: grid; grid-template-columns: 7.5rem 1fr; gap: 0.32rem 0.5rem; }
dl.facts dt {
  font: 500 0.75rem/1.5 var(--mono); letter-spacing: 0.05em;
  text-transform: uppercase; color: var(--faint); padding-top: 0.1em;
}
dl.facts dd { margin: 0; font-size: 0.94rem; }

.info h4 {
  margin: 1.35rem 0 0.5rem; font: 600 0.72rem/1 var(--mono);
  letter-spacing: 0.13em; text-transform: uppercase; color: var(--faint);
}
.info ul.keyed { margin: 0; padding: 0; list-style: none; }
.info ul.keyed li {
  font-size: 0.9rem; margin-bottom: 0.4rem; padding-left: 0;
  display: flex; gap: 0.6rem; align-items: baseline;
}
.info ul.keyed li > :first-child { flex: none; }

.notice {
  margin: 1.35rem 0 0; padding: 0.7rem 0.85rem; border-radius: 4px;
  background: #f6f3ec; border-left: 2px solid var(--clay);
  font-size: 0.89rem; color: #5a5147;
}

/* -------------------------------------------------------------- deadlines */
h2 {
  margin: 3rem 0 0.9rem; font: 600 0.73rem/1 var(--mono);
  letter-spacing: 0.15em; text-transform: uppercase; color: var(--clay);
}

table.deadlines { border-collapse: collapse; width: 100%; }
table.deadlines td { padding: 0.5rem 0.8rem 0.5rem 0; border-bottom: 1px solid var(--rule-2); }
table.deadlines tr:last-child td { border-bottom: 0; }
table.deadlines td:first-child {
  white-space: nowrap; width: 9rem; color: var(--ink);
  font: 500 0.83rem/1.6 var(--mono); font-variant-numeric: tabular-nums;
}
table.deadlines td:last-child { font-size: 0.94rem; }

/* --------------------------------------------------------------- week nav */
.weeknav {
  position: sticky; top: 0; z-index: 10;
  margin: 2.75rem 0 0; padding: 0.7rem 0 0.65rem;
  background: rgba(250,248,244,0.93); backdrop-filter: saturate(1.4) blur(8px);
  border-bottom: 1px solid var(--rule);
  display: flex; flex-wrap: wrap; align-items: center; gap: 0.2rem;
}
.weeknav .lbl {
  font: 600 0.68rem/1 var(--mono); letter-spacing: 0.14em;
  text-transform: uppercase; color: var(--faint); margin-right: 0.55rem;
}
.weeknav a {
  font: 500 0.78rem/1 var(--mono); border: 0; border-radius: 3px;
  min-width: 1.75rem; text-align: center; padding: 0.3rem 0.25rem;
  color: var(--mute);
}
.weeknav a:hover { background: #efece5; color: var(--ink); }
.weeknav a.now { background: var(--clay); color: #fff; }
.weeknav button {
  margin-left: auto; font: 500 0.75rem/1 var(--mono);
  letter-spacing: 0.03em; color: var(--mute); background: none;
  border: 1px solid var(--rule); border-radius: 3px;
  padding: 0.35rem 0.65rem; cursor: pointer;
}
.weeknav button:hover { border-color: var(--slate); color: var(--slate); }

/* ------------------------------------------------------------------ weeks */
.week { scroll-margin-top: 70px; }
.week { border-bottom: 1px solid var(--rule); }
.week > summary {
  cursor: pointer; list-style: none; display: flex; align-items: baseline;
  padding: 1.05rem 0 1rem;
}
.week > summary::-webkit-details-marker { display: none; }
.week > summary::before {
  content: "+"; width: 1.3rem; flex: none;
  font: 400 0.95rem/1 var(--mono); color: var(--faint);
}
.week[open] > summary::before { content: "–"; }
.week > summary:hover .wk { color: var(--clay); }
.wk {
  font: 600 0.98rem/1 var(--sans); color: var(--ink); letter-spacing: -0.005em;
}
.span {
  margin-left: auto; font: 400 0.78rem/1 var(--mono);
  color: var(--faint); letter-spacing: 0.01em;
}
.week[data-current] > summary::before { color: var(--clay); }
.week[data-current] .wk::after {
  content: "this week"; margin-left: 0.7rem;
  font: 600 0.62rem/1 var(--mono); letter-spacing: 0.12em; text-transform: uppercase;
  color: var(--clay); vertical-align: 0.15em;
}

/* --------------------------------------------------------------- meetings */
.meeting { padding: 0 0 1.4rem 1.3rem; }
.week > .meeting:last-of-type { padding-bottom: 1.7rem; }

.meeting h3 {
  margin: 0 0 0.6rem; font-weight: 500; font-size: 0.98rem;
  display: flex; align-items: baseline; flex-wrap: wrap; gap: 0 0.6rem;
}
.meeting time {
  font: 500 0.78rem/1.5 var(--mono); color: var(--mute);
  letter-spacing: 0.01em; font-variant-numeric: tabular-nums;
  min-width: 5.6rem; flex: none;
}
.cn {
  font: 600 0.68rem/1 var(--mono); letter-spacing: 0.06em;
  color: var(--slate); background: #eaeef3; border-radius: 3px;
  padding: 0.25em 0.42em; flex: none;
}
.topic { color: var(--ink); font-weight: 550; }

.meeting.off { padding-bottom: 0.9rem; }
.meeting.off h3 { margin: 0; }
.off-label {
  font: 400 0.85rem/1.5 var(--sans); color: var(--faint); font-style: italic;
}

/* ---------------------------------------------------------------- buckets */
.bucket {
  border-left: 2px solid var(--rule); padding: 0.15rem 0 0.15rem 0.85rem;
  margin: 0 0 0.5rem 0.15rem;
}
.bucket .tag {
  display: inline-flex; align-items: center;
  font: 600 0.64rem/1 var(--mono); letter-spacing: 0.13em; text-transform: uppercase;
  margin-bottom: 0.4rem;
}
.bucket.slides { border-left-color: var(--moss); }
.bucket.slides .tag { color: var(--moss); }
.bucket.reading { border-left-color: var(--clay); }
.bucket.reading .tag { color: var(--clay); }
.bucket.slides { display: flex; align-items: center; gap: 0.75rem; }
.bucket.slides .tag { margin-bottom: 0; }

.chip {
  font: 500 0.8rem/1 var(--mono); border: 1px solid #d5ddd0; border-radius: 4px;
  padding: 0.38rem 0.7rem; background: #f4f7f2; color: #465340;
}
.chip:hover { background: #e9efe5; border-color: var(--moss); }

.bucket.reading ul { margin: 0; padding-left: 1.05rem; }
.bucket.reading li { margin-bottom: 0.5rem; font-size: 0.95rem; }
.bucket.reading li::marker { color: var(--faint); }
.bucket.empty .tbd { font-size: 0.9rem; color: var(--faint); font-style: italic; }

a.dl, a.ext {
  font: 600 0.7rem/1 var(--mono); letter-spacing: 0.04em; text-transform: uppercase;
  border: 0; border-radius: 3px; padding: 0.26em 0.45em;
  background: #eef1f5; color: var(--slate); white-space: nowrap;
}
a.ext { background: #f1efeb; color: var(--mute); }
a.dl:hover { background: #dfe6ee; }
a.ext:hover { background: #e7e4de; }

.badge {
  display: inline-block; white-space: nowrap;
  font: 600 0.66rem/1 var(--mono); letter-spacing: 0.08em; text-transform: uppercase;
  padding: 0.28em 0.5em; border-radius: 3px;
}
.badge.resp { background: #f6ecc9; color: #6b551a; border: 1px solid #e6d59b; }
.badge.disc { background: #edeef1; color: var(--slate); border: 1px solid #dcdfe5; }
.badge.abst { background: #e2eef2; color: #2d5a6b; border: 1px solid #c8dde6; }

.aside { margin: 0.15rem 0 0 1rem; font-size: 0.89rem; color: var(--mute); font-style: italic; }

/* ----------------------------------------------------------------- footer */
footer {
  margin-top: 3.5rem; padding-top: 1.2rem; border-top: 1px solid var(--rule);
  font: 400 0.76rem/1.6 var(--mono); color: var(--faint);
  display: flex; justify-content: space-between; flex-wrap: wrap; gap: 0.4rem;
}

@media (max-width: 620px) {
  body { padding: 0 1.05rem 4rem; font-size: 16px; }
  h1 { font-size: 1.6rem; }
  dl.facts { grid-template-columns: 1fr; gap: 0 0; }
  dl.facts dt { margin-top: 0.55rem; }
  .meeting { padding-left: 0.45rem; }
  .meeting time { min-width: 100%; }
  table.deadlines td:first-child { width: 6.5rem; }
}

/* ===========================================================================
   Materials page. Built at load time from the GitHub contents API, so the
   listing is whatever is actually in the folders.
   =========================================================================== */
.back {
  display: inline-block; margin: 0 0 1.25rem;
  font: 500 0.8rem/1 var(--mono); border: 0; color: var(--mute);
}
.back:hover { color: var(--clay); }

.filelist { margin: 0.6rem 0 0; border-top: 1px solid var(--rule-2); }
.filelist a {
  display: flex; align-items: baseline; gap: 0.75rem;
  padding: 0.55rem 0.2rem; border: 0; border-bottom: 1px solid var(--rule-2);
  font-size: 0.94rem; color: var(--body);
}
.filelist a:hover { background: #f3f0ea; }
.filelist .fn {
  font: 500 0.86rem/1.5 var(--mono); color: var(--ink);
  overflow-wrap: anywhere;
}
.filelist .sz {
  margin-left: auto; flex: none;
  font: 400 0.76rem/1.5 var(--mono); color: var(--faint);
  font-variant-numeric: tabular-nums;
}
.count { font: 400 0.78rem/1 var(--mono); color: var(--faint); margin-left: 0.6rem; }
.status { padding: 0.9rem 0; font-size: 0.92rem; color: var(--mute); }
.status.err { color: #8a4b3a; }