:root {
  color-scheme: light;
  --ink: #202124;
  --muted: #5f6368;
  --paper: #fffdf8;
  --panel: #ffffff;
  --accent: #7a4e00;
  --accent-dark: #553600;
  --event-time: #71624d;
  --rule: #ddd7ca;
  --soft: #f3efe5;
  font-family: "Aptos", "Segoe UI", system-ui, sans-serif;
}

* { box-sizing: border-box; }

body {
  margin: 0;
  color: var(--ink);
  background: var(--paper);
  font-size: 1.05rem;
  line-height: 1.65;
}

a { color: var(--accent-dark); }
a:hover { color: var(--accent); }

.site-header {
  border-top: 0.4rem solid var(--accent);
  border-bottom: 1px solid var(--rule);
  background: var(--panel);
}

.wrap {
  width: min(68rem, calc(100% - 2.5rem));
  margin-inline: auto;
}

.site-header .wrap { padding: 2.2rem 0 1.6rem; }

.eyebrow {
  margin: 0 0 0.2rem;
  color: var(--accent);
  font-size: 0.85rem;
  font-weight: 700;
  letter-spacing: 0.09em;
  text-transform: uppercase;
}

h1, h2 { line-height: 1.2; }
h1 { margin: 0; font-size: clamp(2rem, 5vw, 3.6rem); }
h2 { margin-top: 2.5rem; }

.subtitle { margin: 0.4rem 0 0; color: var(--muted); }

main { padding: 2.5rem 0 4rem; }

.intro { max-width: 48rem; font-size: 1.18rem; }

.cards {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(14rem, 1fr));
  gap: 1rem;
  margin-top: 2.2rem;
}

.card {
  display: block;
  min-height: 9rem;
  padding: 1.2rem 1.25rem;
  border: 1px solid var(--rule);
  border-radius: 0.4rem;
  color: inherit;
  background: var(--panel);
  text-decoration: none;
}

a.card:hover,
.calendar-card-button:hover {
  border-color: var(--accent);
  box-shadow: 0 0.3rem 1rem rgb(60 43 10 / 8%);
  transform: translateY(-1px);
}

.card h2 { margin: 0; font-size: 1.25rem; }
.card p { margin: 0.5rem 0 0; color: var(--muted); }
.card.pending { background: var(--soft); }
.calendar-card-button {
  width: 100%;
  font: inherit;
  text-align: left;
  cursor: pointer;
}
.status { font-size: 0.85rem; font-weight: 650; text-transform: uppercase; }

.back { display: inline-block; margin-bottom: 1.5rem; }
.prose { max-width: 48rem; }
.muted { color: var(--muted); }
.prose li + li { margin-top: 0.65rem; }
ol.roman { list-style-type: lower-roman; }
ol.roman > li::marker { content: counter(list-item, lower-roman) ") "; }
.prose blockquote {
  margin: 1rem 0;
  padding: 0.65rem 1rem;
  border-left: 0.25rem solid var(--accent);
  background: var(--soft);
}
.table-wrap { overflow-x: auto; }
table {
  width: 100%;
  margin: 1rem 0 2.5rem;
  border-collapse: collapse;
  background: var(--panel);
}
th, td {
  padding: 0.7rem 0.8rem;
  border-bottom: 1px solid var(--rule);
  text-align: left;
  vertical-align: top;
}
th { background: var(--soft); }
.weekly-topics-table { min-width: 38rem; }
.weekly-topics-table th:first-child { width: 13rem; }
.weekly-topics-table th:last-child,
.weekly-topics-table td:last-child {
  width: 7rem;
  text-align: center;
  vertical-align: middle;
}
.weekly-topics-table .exam-cell {
  border-left: 0.2rem solid var(--accent);
  background: var(--soft);
  color: var(--accent-dark);
  white-space: nowrap;
}
.blank-policy {
  min-height: 5rem;
  border-left: 0.25rem solid var(--rule);
  padding-left: 1rem;
}
.home-lower {
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(18rem, 24rem);
  gap: 2rem;
  align-items: start;
  margin-top: 2.5rem;
}
.upcoming-events { width: 100%; }
.calendar-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(18rem, 1fr));
  gap: 1rem;
  margin: 2rem 0;
}
.panel {
  padding: 1.2rem 1.25rem;
  border: 1px solid var(--rule);
  border-radius: 0.4rem;
  background: var(--panel);
}
.panel h2 {
  margin: 0 0 0.9rem;
  font-size: 1.25rem;
}
.events {
  display: grid;
  gap: 0.9rem;
  padding: 0;
  margin: 0;
  list-style: none;
}
.events li {
  display: flex;
  gap: 0.65rem;
  align-items: baseline;
}
.events time {
  flex: 0 0 auto;
  color: var(--event-time);
  font-size: 0.9rem;
  font-weight: 700;
}
.events strong { min-width: 0; line-height: 1.3; }
.events span { color: var(--muted); }
.calendar-actions,
.calendar-dialog-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 0.35rem 1rem;
  margin-top: 1rem;
  font-size: 0.92rem;
}
.text-button {
  padding: 0;
  border: 0;
  color: var(--accent-dark);
  background: none;
  font: inherit;
  text-decoration: underline;
  cursor: pointer;
}
.text-button:hover { color: var(--accent); }
.text-button:focus-visible,
.icon-button:focus-visible {
  outline: 0.18rem solid var(--accent);
  outline-offset: 0.18rem;
}
.calendar-dialog {
  width: min(70rem, calc(100% - 2rem));
  max-width: none;
  max-height: calc(100dvh - 2rem);
  padding: 0;
  border: 1px solid var(--rule);
  border-radius: 0.4rem;
  background: var(--panel);
  color: var(--ink);
}
.calendar-dialog::backdrop { background: rgb(32 33 36 / 58%); }
.calendar-dialog-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  padding: 1rem 1.25rem 0;
}
.calendar-dialog-header h2 { margin: 0; font-size: 1.35rem; }
.icon-button {
  display: inline-grid;
  width: 2.5rem;
  height: 2.5rem;
  flex: 0 0 2.5rem;
  place-items: center;
  padding: 0;
  border: 1px solid var(--rule);
  border-radius: 0.25rem;
  color: var(--ink);
  background: var(--panel);
  font: inherit;
  font-size: 1.5rem;
  line-height: 1;
  cursor: pointer;
}
.icon-button:hover { border-color: var(--accent); color: var(--accent); }
.calendar-dialog-actions { margin: 0; padding: 0.45rem 1.25rem 1rem; }
.calendar-dialog iframe {
  display: block;
  width: 100%;
  height: min(45rem, calc(100dvh - 9rem));
  border: 0;
  border-top: 1px solid var(--rule);
  background: var(--panel);
}
.calendar-embed {
  margin-top: 2.5rem;
}
.calendar-embed iframe {
  width: 100%;
  min-height: 42rem;
  border: 1px solid var(--rule);
  border-radius: 0.4rem;
  background: var(--panel);
}

.assignment-shell {
  display: grid;
  grid-template-columns: minmax(13rem, 16rem) minmax(0, 1fr);
  gap: 3rem;
  align-items: start;
}
.assignment-sidebar {
  position: sticky;
  top: 1.5rem;
}
.assignment-sidebar h2 {
  margin: 0 0 1rem;
  font-size: 1.25rem;
}
.assignment-nav-group + .assignment-nav-group { margin-top: 1.4rem; }
.assignment-nav-group h3 {
  margin: 0 0 0.45rem;
  color: var(--muted);
  font-size: 0.78rem;
  letter-spacing: 0.06em;
  text-transform: uppercase;
}
.assignment-nav-group > a,
.assignment-links a {
  display: block;
  padding: 0.45rem 0.65rem;
  border-left: 0.2rem solid transparent;
  color: var(--ink);
  line-height: 1.35;
  text-decoration: none;
}
.assignment-nav-group > a:hover,
.assignment-links a:hover {
  border-left-color: var(--accent);
  color: var(--accent-dark);
  background: var(--soft);
}
.assignment-nav-group a[aria-current="page"] {
  border-left-color: var(--accent);
  background: var(--soft);
  font-weight: 700;
}
.assignment-nav-group > p { margin: 0.35rem 0 0; }
.assignment-links {
  padding: 0;
  margin: 0;
  list-style: none;
}
.assignment-links li + li { margin-top: 0.15rem; }
.assignment-main { min-width: 0; }
.assignment-message {
  min-height: 10rem;
  padding-top: 0.25rem;
  color: var(--muted);
}
.assignment-message.error {
  min-height: 0;
  padding: 0.8rem 1rem;
  border-left: 0.25rem solid var(--accent);
  background: var(--soft);
  color: var(--ink);
}
.assignment-message p { margin-top: 0; }
.assignment-detail {
  width: 100%;
  max-width: 49rem;
}
.assignment-header {
  padding-bottom: 1.5rem;
  border-bottom: 1px solid var(--rule);
}
.assignment-title-row {
  display: flex;
  gap: 1.25rem;
  align-items: center;
  justify-content: space-between;
}
.assignment-title-row h2 {
  margin: 0;
  font-size: clamp(1.75rem, 4vw, 2.35rem);
}
.assignment-availability {
  margin: 0 0 0.5rem;
  color: var(--accent);
  font-size: 0.85rem;
  font-weight: 700;
  text-transform: uppercase;
}
.canvas-submit {
  flex: 0 0 auto;
  padding: 0.55rem 0.8rem;
  border: 1px solid var(--accent-dark);
  border-radius: 0.25rem;
  color: var(--panel);
  background: var(--accent-dark);
  font-size: 0.92rem;
  font-weight: 700;
  line-height: 1.25;
  text-decoration: none;
}
.canvas-submit:hover {
  color: var(--panel);
  background: var(--accent);
}
.canvas-submit:focus-visible,
.assignment-nav-group a:focus-visible {
  outline: 0.18rem solid var(--accent);
  outline-offset: 0.18rem;
}
.assignment-dates {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 0.75rem 2rem;
  margin: 1.2rem 0 0;
}
.assignment-dates div { min-width: 0; }
.assignment-dates dt {
  color: var(--muted);
  font-size: 0.78rem;
  font-weight: 700;
  text-transform: uppercase;
}
.assignment-dates dd {
  margin: 0.05rem 0 0;
  line-height: 1.4;
}
.assignment-instructions {
  margin: 1.75rem 0 2rem;
  padding: 0.9rem 1rem;
  border-left: 0.25rem solid var(--accent);
  background: var(--soft);
}
.assignment-instructions h3 {
  margin: 0 0 0.4rem;
  font-size: 1.05rem;
}
.assignment-instructions p:first-child,
.assignment-body > :first-child { margin-top: 0; }
.assignment-instructions p:last-child,
.assignment-body > :last-child { margin-bottom: 0; }
.assignment-body h2 { margin-top: 2.4rem; font-size: 1.45rem; }
.assignment-body h3 { margin-top: 2rem; font-size: 1.2rem; }
.assignment-body img { max-width: 100%; height: auto; }
.assignment-body pre {
  max-width: 100%;
  padding: 0.8rem 1rem;
  overflow-x: auto;
  background: var(--soft);
}

footer {
  padding: 1.5rem 0;
  border-top: 1px solid var(--rule);
  color: var(--muted);
  font-size: 0.9rem;
}

@media (prefers-reduced-motion: no-preference) {
  a.card,
  .calendar-card-button {
    transition: border-color 120ms, box-shadow 120ms, transform 120ms;
  }
}

@media (max-width: 40rem) {
  .home-lower { grid-template-columns: 1fr; }
  .calendar-embed iframe { min-height: 34rem; }
  .assignment-shell { grid-template-columns: 1fr; gap: 2rem; }
  .assignment-sidebar {
    position: static;
    padding-bottom: 1.5rem;
    border-bottom: 1px solid var(--rule);
  }
  .assignment-title-row { align-items: flex-start; }
  .assignment-dates { grid-template-columns: 1fr; }
}

@media (max-width: 28rem) {
  .assignment-title-row { display: block; }
  .canvas-submit { display: inline-block; margin-top: 1rem; }
}

.material-figure { margin: 1rem 0 0; }
.material-image { display: block; width: min(100%, 71.5625rem); height: auto; border: 1px solid var(--rule); background: var(--panel); }