:root {
  --cardinal: #8c1515;
  --cardinal-dark: #6d1010;
  --cardinal-wash: #f8eeee;
  --ink: #1e293b;
  --body: #334155;
  --muted: #64748b;
  --bg: #ffffff;
  --soft: #f8f9fa;
  --line: #e2e8f0;
  --card-line: #d9dee5;
  --card-bg: #f8f9fa;
  --sans: "Inter", -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  --measure: 780px;
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
/* Cross-page navigations cross-fade instead of hard-flashing (where supported). */
@view-transition { navigation: auto; }
body {
  margin: 0;
  background: var(--bg);
  color: var(--body);
  font-family: var(--sans);
  font-size: 16.5px;
  line-height: 1.65;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}

a { color: var(--cardinal); text-decoration: none; }
a:hover { text-decoration: underline; text-underline-offset: 3px; }
a:focus-visible {
  outline: 3px solid #2e70a7;
  outline-offset: 3px;
  border-radius: 2px;
}

.skip-link {
  position: fixed;
  left: 16px;
  top: 12px;
  z-index: 100;
  transform: translateY(-180%);
  background: #fff;
  color: var(--cardinal-dark);
  border: 2px solid var(--cardinal-dark);
  border-radius: 4px;
  padding: 8px 12px;
  font-weight: 700;
}
.skip-link:focus { transform: translateY(0); }

.wrap { max-width: var(--measure); margin: 0 auto; padding: 0 24px; }

.page-hero {
  background: radial-gradient(120% 150% at 50% 0%, #a01b1b 0%, var(--cardinal) 46%, var(--cardinal-dark) 100%);
  color: #fff;
  padding: 48px 24px 44px;
}
.page-hero .hero-inner { max-width: var(--measure); margin: 0 auto; }
.page-hero .course-name {
  display: inline-block;
  margin-bottom: 13px;
  color: rgba(255,255,255,0.86);
  font-size: 0.93rem;
  font-weight: 600;
}
.page-hero .course-name:hover { color: #fff; }
.page-hero h1 {
  max-width: 18em;
  margin: 0;
  font-size: clamp(1.9rem, 5vw, 2.4rem);
  font-weight: 700;
  line-height: 1.12;
  letter-spacing: -0.02em;
}
.page-hero .sub {
  max-width: 42em;
  margin: 15px 0 0;
  color: rgba(255,255,255,0.9);
  font-size: 1.05rem;
  line-height: 1.55;
}

.tabs {
  position: sticky;
  top: 0;
  z-index: 20;
  view-transition-name: site-tabs;
  background: rgba(255,255,255,0.95);
  border-bottom: 1px solid var(--line);
  box-shadow: 0 1px 4px rgba(0,0,0,0.04);
  backdrop-filter: saturate(140%) blur(10px);
  -webkit-backdrop-filter: saturate(140%) blur(10px);
}
.tabs-inner {
  max-width: 980px;
  margin: 0 auto;
  display: flex;
  justify-content: center;
  gap: 8px;
  overflow-x: auto;
  padding: 0 12px;
  scrollbar-width: none;
}
.tabs-inner::-webkit-scrollbar { display: none; }
.tabs a {
  display: block;
  flex: 0 0 auto;
  padding: 16px 18px 13px;
  color: var(--muted);
  border-bottom: 3px solid transparent;
  font-size: 15.5px;
  font-weight: 500;
  white-space: nowrap;
}
.tabs a:hover { color: var(--cardinal); text-decoration: none; }
.tabs::after {
  content: "";
  position: absolute;
  top: 0; right: 0; bottom: 0;
  width: 40px;
  background: linear-gradient(to left, rgba(255,255,255,0.95), rgba(255,255,255,0));
  pointer-events: none;
  opacity: 0;
  transition: opacity 0.2s;
}
.tabs.can-scroll::after { opacity: 1; }
.tabs a.active { color: var(--cardinal); border-bottom-color: var(--cardinal); }

main { padding: 16px 0 24px; }
.note { font-size: 14.5px; color: var(--muted); }
.next { margin-top: 30px; padding-top: 18px; border-top: 1px solid var(--line); font-weight: 600; }

section { padding: 40px 0 8px; margin-bottom: 0; scroll-margin-top: 72px; }
main p a, main li a, main dd a {
  text-decoration: underline;
  text-decoration-thickness: 1px;
  text-decoration-color: rgba(140,21,21,0.35);
  text-underline-offset: 3px;
}
main p a:hover, main li a:hover, main dd a:hover { text-decoration-color: var(--cardinal); }

h2 {
  margin: 0 0 14px;
  padding-bottom: 14px;
  color: var(--ink);
  border-bottom: 3px solid var(--cardinal);
  font-size: clamp(1.65rem, 4vw, 2.1rem);
  font-weight: 700;
  letter-spacing: -0.01em;
  line-height: 1.25;
}
h3 {
  margin: 28px 0 8px;
  color: var(--ink);
  font-size: 1.12rem;
  line-height: 1.4;
}
h3:first-child { margin-top: 0; }
p { margin: 0 0 16px; }
ul, ol { margin: 0 0 18px; padding-left: 24px; }
li { margin-bottom: 8px; }
strong { color: var(--ink); }



.callout {
  margin: 21px 0;
  padding: 17px 19px;
  border: 1px solid var(--card-line);
  background: var(--soft);
}
.callout p:last-child, .callout ul:last-child { margin-bottom: 0; }
.callout-title { margin-bottom: 5px; color: var(--ink); font-weight: 700; }

.route-list { margin: 18px 0 0; border-top: 1px solid var(--line); }
.route-list > div {
  display: grid;
  grid-template-columns: minmax(130px, 0.75fr) minmax(0, 2fr);
  gap: 22px;
  padding: 16px 0;
  border-bottom: 1px solid var(--line);
}
.route-list dt { color: var(--ink); font-weight: 700; }
.route-list dd { margin: 0; }


.policy-table { width: 100%; margin: 20px 0 24px; border-collapse: collapse; font-size: 0.94rem; }
.policy-table th {
  padding: 11px 13px;
  background: var(--cardinal);
  color: #fff;
  text-align: left;
  font-size: 0.8rem;
  font-weight: 600;
}
.policy-table td { padding: 13px; border-bottom: 1px solid var(--line); vertical-align: top; }
.policy-table th:first-child, .policy-table td:first-child,
.policy-table th:nth-child(2), .policy-table td:nth-child(2) { white-space: nowrap; }
.policy-table tr:nth-child(even) td { background: var(--soft); }

.statement {
  margin: 18px 0 26px;
  padding: 20px 22px;
  border-left: 3px solid var(--cardinal);
  background: var(--soft);
}
.statement p:last-child { margin-bottom: 0; }

footer {
  margin-top: 50px;
  padding: 30px 24px;
  background: var(--cardinal-dark);
  color: rgba(255,255,255,0.82);
  text-align: center;
  font-size: 14px;
}
footer .t { margin: 0 0 5px; color: #fff; font-weight: 600; }
footer p { margin: 0; }

@media (max-width: 720px) {
  .tabs-inner { justify-content: flex-start; }
  .tabs a { padding: 14px 10px 11px; font-size: 13.5px; }
}

@media (max-width: 560px) {
  body { font-size: 16px; }
  .wrap { padding: 0 19px; }
  .page-hero { padding: 38px 19px 36px; }
  main { padding-top: 34px; }
  .route-list > div { grid-template-columns: 1fr; gap: 3px; }
  .policy-table { display: block; overflow-x: auto; }
}

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  @view-transition { navigation: none; }
}

@media print {
  .tabs, .skip-link { display: none; }
  .page-hero { padding: 20px 0; background: #fff; color: #000; }
  .page-hero .course-name, .page-hero .sub { color: #333; }
  main { padding-top: 24px; }
  footer { background: #fff; color: #333; border-top: 1px solid #999; }
  footer .t { color: #000; }
}

/* ===== Syllabus components (moved from the home page with the schedule/grading sections) ===== */
ul.goals { padding-left: 24px; margin: 0 0 16px; }
ul.goals > li { margin-bottom: 14px; }
ul.goals strong { color: var(--ink); }

/* ===== Week cards ===== */
.phase {
  margin: 30px 0 18px;
}
.phase .phase-title {
  color: var(--cardinal);
  font-size: 1.05rem;
  font-weight: 700;
  letter-spacing: 0.02em;
  text-transform: uppercase;
  margin: 0 0 4px;
}
.phase .phase-sub { font-size: 14.5px; color: var(--muted); margin: 0; }

.week-card {
  background: var(--card-bg);
  border: 1px solid var(--card-line);
  border-radius: 12px;
  margin-bottom: 20px;
  overflow: hidden;
}
.week-card .head {
  padding: 20px 24px 16px;
  border-bottom: 1px solid var(--card-line);
}
.week-card .head h3 {
  margin: 0;
  font-size: 1.22rem;
  font-weight: 700;
  color: var(--ink);
  line-height: 1.35;
}
.week-card .body { padding: 18px 24px 20px; }
.week-card h4 {
  color: var(--cardinal);
  font-size: 1rem;
  font-weight: 700;
  margin: 16px 0 8px;
}
.week-card h4:first-child { margin-top: 0; }
.week-card p { font-size: 15px; margin: 0 0 8px; }
.week-card ul { margin: 0; padding-left: 22px; font-size: 15px; }
.week-card li { margin-bottom: 6px; }
.week-card .gate { color: var(--cardinal); font-weight: 600; }
.week-card .opt { color: var(--muted); }

/* ===== Grading table ===== */
.grade-table { width: 100%; border-collapse: collapse; margin-top: 20px; font-size: 15.5px; }
.grade-table th {
  text-align: left;
  font-size: 13px;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  color: #fff;
  background: var(--cardinal);
  padding: 12px 16px;
  font-weight: 600;
}
.grade-table th:last-child, .grade-table td.wt { text-align: right; }
.grade-table td { padding: 14px 16px; border-bottom: 1px solid var(--line); vertical-align: top; }
.grade-table tr:nth-child(even) td { background: var(--card-bg); }
.grade-table .cat { font-weight: 700; color: var(--ink); white-space: nowrap; }
.grade-table td ul { margin: 0; padding-left: 18px; }
.grade-table .wt { font-weight: 700; color: var(--cardinal); font-size: 1.1rem; white-space: nowrap; }
@media (max-width: 560px) {
  .grade-table { font-size: 14px; }
  .grade-table th { padding: 10px 8px; font-size: 11.5px; letter-spacing: 0.04em; }
  .grade-table td { padding: 12px 8px; }
  .grade-table .cat { white-space: normal; }
  .grade-table .wt { font-size: 1rem; }
  .grade-table td ul { padding-left: 14px; }
}

/* ===== Appendix cards ===== */
.card {
  background: var(--card-bg);
  border: 1px solid var(--card-line);
  border-radius: 12px;
  padding: 20px 24px;
  margin-bottom: 16px;
}
.card h3 { margin: 0 0 8px; font-size: 1.08rem; }
.card p { font-size: 15px; margin: 0; }
.card p + p { margin-top: 8px; }
.card .time { font-size: 13px; font-weight: 500; color: var(--muted); }