:root {
  --ink: #182029;
  --muted: #5a6675;
  --line: #d9dee5;
  --paper: #f8f7f4;
  --surface: #ffffff;
  --accent: #8a2f2f;
  --accent-2: #1f6f64;
  --accent-3: #345a8a;
  --accent-4: #a66b1f;
  --soft-red: #f5e7e3;
  --soft-green: #e8f1ee;
  --soft-blue: #e8eef6;
  --soft-gold: #f4eddf;
  --radius: 8px;
  --shadow: 0 10px 30px rgba(24, 32, 41, 0.08);
  font-family: "Segoe UI", Arial, sans-serif;
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  background: var(--paper);
  color: var(--ink);
  line-height: 1.55;
}

a {
  color: var(--accent-3);
  text-decoration-thickness: 1px;
  text-underline-offset: 3px;
}

.topbar {
  position: sticky;
  top: 0;
  z-index: 20;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 20px;
  padding: 14px 28px;
  background: rgba(248, 247, 244, 0.96);
  border-bottom: 1px solid var(--line);
  backdrop-filter: blur(8px);
}

.brand {
  display: flex;
  align-items: center;
  gap: 12px;
  color: var(--ink);
  text-decoration: none;
}

.brand-mark {
  display: grid;
  place-items: center;
  width: 38px;
  height: 38px;
  border: 1px solid var(--ink);
  border-radius: 6px;
  font-weight: 700;
}

.brand small {
  display: block;
  color: var(--muted);
  font-size: 12px;
}

.nav {
  display: flex;
  flex-wrap: wrap;
  justify-content: flex-end;
  gap: 12px;
  font-size: 14px;
}

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

.nav a:hover {
  border-color: var(--accent);
}

.overview-shell {
  display: grid;
  grid-template-columns: minmax(0, 1.15fr) minmax(320px, 0.85fr);
  gap: 36px;
  align-items: center;
  max-width: 1180px;
  margin: 0 auto;
  min-height: calc(100vh - 68px);
  padding: 56px 28px 42px;
}

.kicker {
  margin: 0 0 8px;
  color: var(--accent);
  font-size: 12px;
  font-weight: 700;
  letter-spacing: 0;
  text-transform: uppercase;
}

h1,
h2,
h3 {
  margin: 0;
  line-height: 1.12;
  letter-spacing: 0;
}

h1 {
  max-width: 760px;
  font-size: clamp(38px, 7vw, 74px);
}

h2 {
  font-size: clamp(28px, 4vw, 42px);
}

h3 {
  font-size: 20px;
}

.lede {
  max-width: 720px;
  margin: 22px 0 26px;
  color: var(--muted);
  font-size: 20px;
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin: 0 0 20px;
}

.syllabus-download {
  background: var(--surface);
}

.course-facts {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 10px;
  max-width: 680px;
  margin: 0;
}

.course-facts div {
  padding: 14px;
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: var(--radius);
}

.course-facts dt {
  color: var(--muted);
  font-size: 12px;
  text-transform: uppercase;
}

.course-facts dd {
  margin: 4px 0 0;
  font-weight: 700;
}

.order-map {
  margin: 0;
}

.order-map img {
  display: block;
  width: 100%;
  height: auto;
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
}

.order-map figcaption {
  margin-top: 10px;
  color: var(--muted);
  font-size: 13px;
}

.section-band {
  background: var(--surface);
  border-block: 1px solid var(--line);
}

.section-inner {
  max-width: 1180px;
  margin: 0 auto;
  padding: 56px 28px;
}

.two-column {
  display: grid;
  grid-template-columns: minmax(260px, 0.8fr) minmax(0, 1.2fr);
  gap: 36px;
}

.architecture-text p {
  margin: 0 0 16px;
  color: var(--muted);
  font-size: 18px;
}

.professor-section {
  display: grid;
  grid-template-columns: minmax(260px, 0.7fr) minmax(0, 1.3fr);
  gap: 36px;
}

.professor-profile {
  display: grid;
  gap: 18px;
}

.professor-lead {
  margin: 0;
  color: var(--muted);
  font-size: 18px;
}

.professor-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 14px;
}

.professor-box {
  padding: 18px;
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: var(--radius);
}

.professor-box h3 {
  margin-bottom: 12px;
}

.text-command,
.topic-link {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 38px;
  width: fit-content;
  padding: 8px 12px;
  border: 1px solid var(--accent);
  border-radius: 6px;
  color: var(--accent);
  font-weight: 750;
  text-decoration: none;
}

.topic-link:hover,
.text-command:hover {
  background: var(--soft-red);
}

.section-heading {
  display: flex;
  align-items: end;
  justify-content: space-between;
  gap: 28px;
  margin-bottom: 24px;
}

.section-heading.compact {
  align-items: start;
}

.controls {
  display: grid;
  grid-template-columns: minmax(220px, 1.4fr) repeat(3, minmax(150px, 1fr));
  gap: 10px;
  width: min(100%, 760px);
}

.controls label {
  display: grid;
  gap: 5px;
  color: var(--muted);
  font-size: 12px;
  font-weight: 700;
  text-transform: uppercase;
}

input,
select {
  width: 100%;
  min-height: 42px;
  padding: 9px 10px;
  border: 1px solid var(--line);
  border-radius: 6px;
  background: var(--surface);
  color: var(--ink);
  font: inherit;
}

.result-count {
  margin-bottom: 14px;
  color: var(--muted);
  font-size: 14px;
}

.weeks-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 18px;
}

.week-card {
  display: grid;
  gap: 16px;
  padding: 22px;
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
}

.week-topline {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
}

.week-number {
  color: var(--accent);
  font-size: 13px;
  font-weight: 800;
  text-transform: uppercase;
}

.tag-row {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
}

.tag {
  display: inline-flex;
  align-items: center;
  min-height: 24px;
  padding: 3px 8px;
  background: var(--soft-blue);
  border-radius: 999px;
  color: #243f63;
  font-size: 12px;
  font-weight: 650;
}

.tag.issue {
  background: var(--soft-green);
  color: #25574f;
}

.tag.institution {
  background: var(--soft-gold);
  color: #684a1b;
}

.problem {
  margin: 0;
  color: var(--muted);
  font-size: 16px;
}

.thesis {
  margin: 0;
  padding-left: 14px;
  border-left: 3px solid var(--accent);
  font-weight: 650;
}

.week-details {
  border-top: 1px solid var(--line);
  padding-top: 12px;
}

.week-details summary {
  cursor: pointer;
  font-weight: 750;
}

.detail-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 16px;
  margin-top: 14px;
}

.detail-block h4 {
  margin: 0 0 8px;
  font-size: 13px;
  text-transform: uppercase;
  color: var(--muted);
}

.detail-block ul {
  margin: 0;
  padding-left: 18px;
}

.detail-block li {
  margin-bottom: 6px;
}

.map-grid,
.issue-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 14px;
}

.map-item,
.issue-item {
  padding: 18px;
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: var(--radius);
}

.map-item strong,
.issue-item strong {
  display: block;
  margin-bottom: 8px;
}

.map-item span,
.issue-item span {
  color: var(--muted);
  font-size: 14px;
}

.assessment-layout {
  display: grid;
  grid-template-columns: minmax(260px, 0.8fr) minmax(0, 1.2fr);
  gap: 36px;
}

.assessment-panel {
  display: grid;
  gap: 14px;
}

.assessment-card {
  padding: 18px;
  background: var(--paper);
  border: 1px solid var(--line);
  border-radius: var(--radius);
}

.assessment-card h3 {
  margin-bottom: 8px;
}

.academic-updates-section {
  display: grid;
  grid-template-columns: minmax(0, 1fr) auto;
  gap: 24px;
  align-items: center;
}

.academic-updates-section p {
  max-width: 820px;
  margin: 14px 0 0;
  color: var(--muted);
  font-size: 18px;
}

.source-list {
  display: grid;
  gap: 10px;
}

.source-item {
  display: grid;
  grid-template-columns: minmax(220px, 0.7fr) minmax(0, 1fr) minmax(110px, 0.25fr);
  gap: 14px;
  align-items: start;
  padding: 14px 0;
  border-bottom: 1px solid var(--line);
}

.source-item p {
  margin: 0;
  color: var(--muted);
}

.footer {
  padding: 26px 28px;
  color: var(--muted);
  text-align: center;
}

.topic-page {
  background: var(--paper);
}

.topic-layout {
  max-width: 1180px;
  margin: 0 auto;
  padding: 46px 28px 64px;
}

.topic-hero {
  padding: 32px 0 36px;
  border-bottom: 1px solid var(--line);
}

.topic-hero h1 {
  max-width: 940px;
  font-size: clamp(34px, 6vw, 64px);
}

.topic-meta {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 10px;
  margin-top: 24px;
}

.meta-row {
  padding: 14px;
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: var(--radius);
}

.meta-row span {
  display: block;
  color: var(--muted);
  font-size: 12px;
  font-weight: 700;
  text-transform: uppercase;
}

.meta-row strong {
  display: block;
  margin-top: 4px;
}

.topic-grid {
  display: grid;
  grid-template-columns: minmax(0, 1.25fr) minmax(280px, 0.75fr);
  gap: 20px;
  margin-top: 24px;
}

.topic-main,
.topic-panel,
.topic-side {
  padding: 24px;
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
}

.topic-summary {
  margin: 0;
  color: var(--ink);
  font-size: 18px;
}

.concept-callout {
  margin-top: 20px;
  padding: 16px;
  border-left: 4px solid var(--accent);
  background: var(--soft-red);
  border-radius: 0 var(--radius) var(--radius) 0;
}

.concept-callout p {
  margin: 8px 0 0;
}

.muted-callout {
  background: var(--soft-blue);
  border-left-color: var(--accent-3);
}

.topic-side p {
  margin-top: 0;
  color: var(--muted);
}

.split-list {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 16px;
}

.topic-panel h2 {
  margin-bottom: 16px;
}

.topic-panel h3 {
  margin: 16px 0 10px;
}

.topic-panel ul {
  margin: 0;
  padding-left: 20px;
}

.topic-panel li {
  margin-bottom: 8px;
}

.readings-panel {
  margin-top: 24px;
}

.readings-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 16px;
}

.reading-category {
  padding: 16px;
  background: var(--paper);
  border: 1px solid var(--line);
  border-radius: var(--radius);
}

.reading-category h3 {
  margin-top: 0;
}

.reading-note {
  color: var(--muted);
}

.topic-nav {
  display: flex;
  flex-wrap: wrap;
  justify-content: space-between;
  gap: 12px;
  margin-top: 24px;
}

.topic-nav a {
  min-height: 40px;
  padding: 9px 12px;
  border: 1px solid var(--line);
  border-radius: 6px;
  background: var(--surface);
  color: var(--ink);
  font-weight: 700;
  text-decoration: none;
}

.topic-nav a:hover {
  border-color: var(--accent);
  color: var(--accent);
}

.academic-layout {
  max-width: 1180px;
  margin: 0 auto;
  padding: 46px 28px 64px;
}

.academic-hero {
  padding: 32px 0 28px;
  border-bottom: 1px solid var(--line);
}

.academic-hero h1 {
  max-width: 940px;
  font-size: clamp(34px, 6vw, 64px);
}

.academic-copyright {
  max-width: 820px;
  margin: 0 0 16px;
  color: var(--muted);
}

.academic-status {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  color: var(--muted);
  font-size: 14px;
  font-weight: 700;
}

.academic-status span {
  padding: 6px 9px;
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: 6px;
}

.academic-controls-panel {
  margin-top: 24px;
}

.academic-controls {
  width: 100%;
}

.academic-topic-summary {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 10px;
  margin-top: 20px;
}

.topic-summary-link {
  display: grid;
  gap: 4px;
  min-height: 92px;
  padding: 12px;
  background: var(--paper);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  color: var(--ink);
  text-decoration: none;
}

.topic-summary-link:hover {
  border-color: var(--accent);
}

.topic-summary-link span,
.topic-summary-link small {
  color: var(--muted);
  font-size: 12px;
  font-weight: 700;
  text-transform: uppercase;
}

.topic-summary-link strong {
  line-height: 1.25;
}

.academic-results {
  display: grid;
  gap: 24px;
  margin-top: 24px;
}

.academic-topic-group {
  scroll-margin-top: 90px;
}

.academic-topic-heading {
  margin-bottom: 12px;
}

.academic-topic-heading h2 {
  margin-top: 6px;
  font-size: clamp(24px, 3vw, 34px);
}

.academic-topic-heading p {
  max-width: 900px;
  margin: 10px 0 0;
  color: var(--muted);
}

.academic-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 14px;
}

.academic-record {
  display: grid;
  gap: 10px;
  padding: 16px;
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
}

.academic-record-meta {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
}

.academic-title {
  color: var(--ink);
  font-size: 17px;
  font-weight: 800;
  line-height: 1.28;
}

.academic-authors,
.academic-venue,
.academic-note {
  margin: 0;
}

.academic-authors {
  font-weight: 650;
}

.academic-venue,
.academic-note {
  color: var(--muted);
  font-size: 14px;
}

@media (max-width: 920px) {
  .topbar,
  .section-heading {
    align-items: start;
    flex-direction: column;
  }

  .academic-updates-section {
    grid-template-columns: 1fr;
    align-items: start;
  }

  .overview-shell,
  .two-column,
  .assessment-layout,
  .professor-section,
  .topic-grid {
    grid-template-columns: 1fr;
  }

  .overview-shell {
    min-height: auto;
  }

  .controls,
  .weeks-grid,
  .detail-grid,
  .map-grid,
  .issue-grid,
  .source-item,
  .professor-grid,
    .topic-meta,
    .split-list,
    .readings-grid,
    .academic-topic-summary,
    .academic-grid {
    grid-template-columns: 1fr;
  }
}

@media (max-width: 640px) {
  .topbar,
  .section-inner,
  .overview-shell {
    padding-left: 18px;
    padding-right: 18px;
  }

  .course-facts {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  h1 {
    font-size: 38px;
  }
}