@import url("/assets/brand.css");

@font-face {
  font-family: "Inter";
  font-style: normal;
  font-weight: 400 800;
  font-display: swap;
  src: url("fonts/inter-latin-variable.woff2") format("woff2");
}

@font-face {
  font-family: "IBM Plex Mono";
  font-style: normal;
  font-weight: 400;
  font-display: swap;
  src: url("fonts/ibm-plex-mono-latin-400.woff2") format("woff2");
}

@font-face {
  font-family: "IBM Plex Mono";
  font-style: normal;
  font-weight: 500;
  font-display: swap;
  src: url("fonts/ibm-plex-mono-latin-500.woff2") format("woff2");
}

@font-face {
  font-family: "IBM Plex Mono";
  font-style: normal;
  font-weight: 600;
  font-display: swap;
  src: url("fonts/ibm-plex-mono-latin-600.woff2") format("woff2");
}

:root {
  color-scheme: light;
  --bg: #e8eaed;
  --paper: #eff1f3;
  --surface: #e2e4e8;
  --surface-strong: #d5d8dd;
  --ink: #272727;
  --ink-strong: #272727;
  --muted: #696773;
  --quiet: #696773;
  --line: rgba(39, 39, 39, 0.14);
  --line-strong: rgba(39, 39, 39, 0.28);
  --accent: #fed766;
  --accent-strong: #272727;
  --accent-soft: #fff3c2;
  --accent-ink: #7d5a00;
  --link: #006b7c;
  --error-ink: #7a302a;
  --success-ink: #47704d;
  --shadow: 0 18px 48px rgba(18, 31, 25, 0.08);
  --ease-out: cubic-bezier(0.23, 1, 0.32, 1);
  --ease-in-out: cubic-bezier(0.77, 0, 0.175, 1);
  --sans: "Inter", "Apple SD Gothic Neo", "Noto Sans KR", "Malgun Gothic", sans-serif;
  --mono: "IBM Plex Mono", "SF Mono", Menlo, ui-monospace, monospace;

  /* Compatibility aliases for the generated teaching handouts. */
  --page: var(--bg);
  --soft-ink: var(--ink);
  --slate: var(--ink-strong);
  --slate-2: var(--ink);
  --font-latin: var(--sans);
  --font-ko: var(--sans);
  --font-mono: var(--mono);
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

html:has(body.teaching-index) {
  scroll-behavior: auto;
}

body.teaching-index,
body.teaching-document {
  margin: 0;
  background: var(--bg);
  color: var(--ink);
  font-family: var(--sans);
  font-size: 16px;
  line-height: 1.62;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}

body.teaching-index a,
body.teaching-document a {
  color: var(--link);
  text-decoration: none;
}

body.teaching-index a:hover,
body.teaching-document a:hover {
  text-decoration: underline;
  text-underline-offset: 3px;
}

body.teaching-index button,
body.teaching-index a,
body.teaching-document button,
body.teaching-document a {
  -webkit-tap-highlight-color: transparent;
}

.site-header {
  position: sticky;
  top: 0;
  z-index: 40;
  border-bottom: 1px solid var(--line);
  background: color-mix(in srgb, var(--paper) 93%, transparent);
  backdrop-filter: blur(14px);
}

.nav {
  width: min(1180px, calc(100% - 48px));
  min-height: 64px;
  margin: 0 auto;
  display: flex;
  align-items: center;
  gap: 30px;
}

.nav .brand {
  margin-right: auto;
  color: var(--ink-strong);
  font-size: 18px;
  font-weight: 800;
  letter-spacing: -0.02em;
  line-height: 1;
  white-space: nowrap;
}

.nav a:not(.brand) {
  color: var(--muted);
  font-size: 14px;
  font-weight: 600;
  white-space: nowrap;
}

.nav a:hover,
.nav a[aria-current="page"] {
  color: var(--accent-ink);
  text-decoration: none;
}

.nav a[aria-current="page"] {
  box-shadow: inset 0 -2px 0 var(--accent);
}

.teaching-shell,
.course-hero-inner,
.course-content,
.archive-hero,
.lesson-header-inner {
  width: min(1180px, calc(100% - 48px));
  margin-inline: auto;
}

.archive-hero {
  padding: 82px 0 54px;
  display: grid;
  grid-template-columns: minmax(0, 1.1fr) minmax(260px, 0.55fr);
  gap: 70px;
  align-items: end;
}

.archive-kicker,
.course-kicker,
.section-kicker,
.course-kind,
.course-term,
.week-heading-label,
.day-heading-label,
.material-kind,
.week,
.area-label,
.lesson-sequence a,
.lesson-breadcrumb {
  font-family: var(--mono);
}

.archive-kicker,
.course-kicker,
.section-kicker {
  margin: 0 0 16px;
  color: var(--accent-ink);
  font-size: 11px;
  font-weight: 600;
  letter-spacing: 0.04em;
  text-transform: uppercase;
}

.archive-hero h1,
.course-hero h1 {
  margin: 0;
  color: var(--ink-strong);
  font-size: clamp(42px, 6vw, 72px);
  font-weight: 790;
  letter-spacing: -0.055em;
  line-height: 0.98;
  word-break: keep-all;
}

.archive-intro {
  margin: 0;
  color: var(--muted);
  font-size: 17px;
  line-height: 1.68;
  word-break: keep-all;
}

.teaching-shell {
  padding: 10px 0 108px;
}

.archive-section {
  margin-top: 86px;
}

.archive-section:first-child {
  margin-top: 0;
}

.archive-heading {
  margin-bottom: 24px;
  padding-bottom: 16px;
  border-bottom: 1px solid var(--line-strong);
  display: grid;
  grid-template-columns: minmax(200px, 0.68fr) minmax(0, 1.32fr);
  gap: 30px;
  align-items: end;
}

.archive-heading h2,
.course-section-title {
  margin: 0;
  color: var(--ink-strong);
  font-size: 28px;
  font-weight: 780;
  letter-spacing: -0.035em;
  line-height: 1.16;
}

.archive-heading p {
  max-width: 620px;
  margin: 0;
  color: var(--muted);
  font-size: 14px;
  line-height: 1.62;
}

.featured-course {
  min-height: 430px;
  border: 1px solid var(--line);
  border-radius: 6px;
  display: grid;
  grid-template-columns: minmax(0, 1.35fr) minmax(300px, 0.65fr);
  overflow: hidden;
  background: var(--paper);
  color: inherit;
  box-shadow: var(--shadow);
  transition:
    border-color 180ms ease,
    box-shadow 180ms ease,
    transform 120ms var(--ease-out);
}

.featured-course:hover {
  border-color: var(--line-strong);
  box-shadow: 0 22px 58px rgba(18, 31, 25, 0.12);
  text-decoration: none;
  transform: translateY(-2px);
}

.featured-course-visual,
.course-card-visual,
.course-visual {
  overflow: hidden;
  background: var(--surface-strong);
}

.featured-course-visual img,
.course-card-visual img,
.course-visual img {
  width: 100%;
  height: 100%;
  display: block;
  object-fit: cover;
  transition: transform 240ms ease;
}

.featured-course:hover img,
.course-card:hover img {
  transform: scale(1.015);
}

.featured-course-copy {
  padding: 34px;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  gap: 42px;
}

.course-meta {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 9px 18px;
}

.course-kind,
.course-term {
  color: var(--quiet);
  font-size: 10.5px;
  font-weight: 500;
  line-height: 1.45;
  text-transform: uppercase;
}

.course-term {
  margin-left: auto;
}

.featured-course h2,
.course-card h2 {
  margin: 18px 0 0;
  color: var(--ink-strong);
  font-size: clamp(27px, 3vw, 40px);
  font-weight: 770;
  letter-spacing: -0.04em;
  line-height: 1.12;
  word-break: keep-all;
}

.featured-course p,
.course-card p {
  margin: 16px 0 0;
  color: var(--muted);
  font-size: 14px;
  line-height: 1.62;
  word-break: keep-all;
}

.course-link-label {
  color: var(--accent-ink);
  font-size: 13px;
  font-weight: 700;
}

.course-grid {
  margin-top: 22px;
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 22px;
}

.course-card {
  min-width: 0;
  border: 1px solid var(--line);
  border-radius: 6px;
  display: grid;
  grid-template-rows: 240px 1fr;
  overflow: hidden;
  background: var(--paper);
  color: inherit;
  transition: border-color 180ms ease, box-shadow 180ms ease, transform 180ms ease;
}

.course-card:hover {
  border-color: var(--line-strong);
  box-shadow: var(--shadow);
  text-decoration: none;
  transform: translateY(-2px);
}

.course-card-copy {
  padding: 28px;
  display: flex;
  flex-direction: column;
  gap: 20px;
}

.course-card-copy .course-link-label {
  margin-top: auto;
}

.teaching-areas {
  border-top: 1px solid var(--line-strong);
}

.teaching-area {
  padding: 20px 0;
  border-bottom: 1px solid var(--line);
  display: grid;
  grid-template-columns: minmax(220px, 0.72fr) minmax(0, 1.28fr);
  gap: 30px;
}

.teaching-area h3 {
  margin: 0;
  color: var(--ink-strong);
  font-size: 17px;
  font-weight: 730;
  letter-spacing: -0.02em;
}

.teaching-area p {
  margin: 0;
  color: var(--muted);
  font-size: 14px;
}

.area-label {
  display: block;
  margin-bottom: 7px;
  color: var(--quiet);
  font-size: 10px;
  text-transform: uppercase;
}

.archive-footer,
.course-footer {
  margin-top: 70px;
  padding-top: 20px;
  border-top: 1px solid var(--line);
  display: flex;
  justify-content: space-between;
  gap: 24px;
  color: var(--quiet);
  font-size: 12px;
}

/* Course indexes */

.course-hero {
  border-bottom: 1px solid var(--line-strong);
  background: var(--paper);
}

.course-hero-inner {
  min-height: 430px;
  padding: 56px 0;
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(300px, 430px);
  gap: 68px;
  align-items: center;
}

.course-hero h1 {
  max-width: 760px;
  font-size: clamp(38px, 5.2vw, 66px);
  line-height: 1.02;
}

.course-lead {
  max-width: 700px;
  margin: 24px 0 0;
  color: var(--muted);
  font-size: 17px;
  line-height: 1.66;
  word-break: keep-all;
}

.course-hero .course-meta {
  margin-top: 28px;
}

.course-visual {
  margin: 0;
  height: 300px;
  border: 1px solid var(--line);
  border-radius: 6px;
  box-shadow: var(--shadow);
}

.course-jump-wrap {
  position: sticky;
  top: 64px;
  z-index: 30;
  border-bottom: 1px solid var(--line);
  background: color-mix(in srgb, var(--bg) 94%, transparent);
  backdrop-filter: blur(14px);
}

.course-jump {
  width: min(1180px, calc(100% - 48px));
  margin: 0 auto;
  display: flex;
  align-items: center;
  gap: 4px;
  overflow-x: auto;
  scrollbar-width: none;
}

.course-jump::-webkit-scrollbar {
  display: none;
}

.course-jump-cluster,
.course-jump-weeks {
  display: flex;
  align-items: center;
  gap: 0;
}

.course-jump-cluster {
  flex: 0 0 auto;
  position: sticky;
  left: 0;
  z-index: 1;
  padding-right: 8px;
  margin-right: 4px;
  border-right: 1px solid var(--line);
  background: var(--bg);
}

.course-jump-weeks {
  flex: 0 0 auto;
}

.course-jump a {
  flex: 0 0 auto;
  padding: 13px 12px 11px;
  border-bottom: 2px solid transparent;
  color: var(--quiet);
  font-family: var(--mono);
  font-size: 10px;
  font-weight: 500;
  text-transform: uppercase;
  transition:
    color 160ms var(--ease-out),
    border-color 160ms var(--ease-out),
    transform 120ms var(--ease-out);
}

.course-jump a:hover,
.course-jump a:focus-visible,
.course-jump a[aria-current="true"] {
  border-bottom-color: var(--accent-ink);
  color: var(--accent-ink);
  text-decoration: none;
}

.course-jump a:active {
  transform: scale(0.98);
}

.course-content,
.page.course-content {
  max-width: none;
  padding: 60px 0 106px;
}

.course-section {
  scroll-margin-top: 126px;
}

.course-section + .course-section {
  margin-top: 74px;
}

.course-section-heading {
  margin-bottom: 18px;
  padding-bottom: 15px;
  border-bottom: 1px solid var(--line-strong);
  display: flex;
  justify-content: space-between;
  gap: 24px;
  align-items: end;
}

.course-section-note {
  max-width: 520px;
  margin: 0;
  color: var(--muted);
  font-size: 13px;
  text-align: right;
}

.material-list {
  display: grid;
  gap: 0;
}

.week-group,
.day-group {
  scroll-margin-top: 132px;
  padding: 23px 0;
  border-bottom: 1px solid var(--line);
  display: grid;
  grid-template-columns: minmax(150px, 0.42fr) minmax(0, 1.58fr);
  gap: 34px;
}

.week-heading,
.day-heading {
  display: block;
}

.week-heading-label,
.day-heading-label {
  display: block;
  color: var(--accent-ink);
  font-size: 10.5px;
  font-weight: 600;
  text-transform: uppercase;
}

.week-heading-rule,
.day-heading-rule {
  display: none;
}

.week-heading-topic,
.day-heading-topic {
  display: block;
  margin-top: 8px;
  color: var(--muted);
  font-size: 13px;
  font-weight: 620;
  line-height: 1.45;
  text-transform: none;
}

.week-cards,
.day-cards {
  min-width: 0;
  display: grid;
  gap: 0;
}

.material-card {
  min-width: 0;
  padding: 14px 0;
  border: 0;
  border-bottom: 1px solid var(--line);
  border-radius: 0;
  display: grid;
  grid-template-columns: 96px minmax(0, 1fr) auto;
  gap: 20px;
  align-items: start;
  background: transparent;
  color: inherit;
  box-shadow: none;
  transition: background 160ms var(--ease-out), color 160ms var(--ease-out), transform 120ms var(--ease-out);
}

.material-card:first-child {
  padding-top: 0;
}

.material-card:last-child {
  padding-bottom: 0;
  border-bottom: 0;
}

.material-kind,
.week {
  padding-top: 3px;
  color: var(--quiet);
  font-size: 10px;
  font-weight: 500;
  line-height: 1.4;
  text-transform: uppercase;
  white-space: nowrap;
}

.material-title {
  display: block;
  color: var(--ink-strong);
  font-size: 16px;
  font-weight: 720;
  letter-spacing: -0.015em;
  line-height: 1.4;
  word-break: keep-all;
}

.material-meta {
  display: block;
  max-width: 760px;
  margin-top: 5px;
  color: var(--muted);
  font-size: 13px;
  line-height: 1.52;
  word-break: keep-all;
}

.open-label {
  padding-top: 1px;
  color: var(--accent-ink);
  font-size: 15px;
  font-weight: 700;
  line-height: 1;
}

body.course-contents-programming .course-hero .course-term,
body.course-game-engine-1.teaching-index .course-hero .course-term {
  margin-left: 0;
}

body.course-contents-programming.teaching-index .course-content,
body.course-game-engine-1.teaching-index .course-content {
  padding-bottom: min(42vh, 380px);
}

body.course-contents-programming .course-section-heading,
body.course-contents-programming .course-disclosure > summary.course-section-heading,
body.course-game-engine-1.teaching-index .course-section-heading,
body.course-game-engine-1.teaching-index .course-disclosure > summary.course-section-heading {
  display: grid;
  justify-content: stretch;
  align-items: start;
  gap: 6px;
}

body.course-contents-programming .course-disclosure .course-section-title,
body.course-game-engine-1.teaching-index .course-disclosure .course-section-title {
  scroll-margin-top: 126px;
}

body.course-contents-programming .course-section-note,
body.course-game-engine-1.teaching-index .course-section-note {
  text-align: left;
  max-width: 65ch;
}

body.course-contents-programming a.material-card-mission .week,
body.course-game-engine-1.teaching-index a.material-card-mission .week {
  color: var(--accent-ink);
}

body.course-contents-programming .material-card-pending,
body.course-game-engine-1.teaching-index .material-card-pending {
  opacity: 0.72;
  cursor: default;
}

body.course-contents-programming .material-card-pending .material-title,
body.course-game-engine-1.teaching-index .material-card-pending .material-title {
  color: var(--muted);
  font-weight: 640;
}

.material-card .assignment-label {
  display: block;
  width: fit-content;
}

.course-feature-link {
  margin-bottom: 28px;
  padding: 24px;
  border: 1px solid var(--line);
  border-radius: 6px;
  display: grid;
  grid-template-columns: 112px minmax(0, 1fr) auto;
  gap: 22px;
  background: var(--paper);
  color: inherit;
}

.course-feature-link:hover {
  border-color: var(--line-strong);
  text-decoration: none;
}

.course-note,
.note {
  margin: 34px 0 0;
  padding: 18px 0 0;
  border: 0;
  border-top: 1px solid var(--line);
  border-radius: 0;
  background: transparent;
  color: var(--muted);
  font-size: 13px;
}

.course-prose > p,
.course-disclosure-content > p {
  max-width: none;
  margin: 0;
  color: var(--ink);
  font-size: 16px;
  line-height: 1.9;
  overflow-wrap: break-word;
}

p[data-pretext-laid-out] {
  white-space: nowrap;
}

.course-prose > p + p,
.course-disclosure-content > p + p {
  margin-top: 18px;
}

.course-disclosure {
  border-bottom: 1px solid var(--line-strong);
}

.course-disclosure > summary.course-section-heading {
  position: relative;
  margin: 0;
  padding: 18px 48px 18px 0;
  border: 0;
  list-style: none;
  cursor: pointer;
  user-select: none;
}

.course-disclosure > summary .course-section-title {
  width: 100%;
  display: flex;
  justify-content: space-between;
  gap: 24px;
  align-items: end;
}

.course-disclosure > summary .course-section-note {
  font-weight: 400;
  letter-spacing: normal;
}

.course-disclosure > summary::-webkit-details-marker {
  display: none;
}

.course-disclosure > summary::marker {
  content: "";
}

.course-disclosure > summary::after {
  content: "";
  position: absolute;
  top: 50%;
  right: 8px;
  width: 9px;
  height: 9px;
  border-right: 2px solid var(--accent);
  border-bottom: 2px solid var(--accent);
  transform: translateY(-65%) rotate(45deg);
  transform-origin: center;
  transition: transform 160ms var(--ease-out);
}

.course-disclosure > summary:hover .course-section-title {
  color: var(--accent-ink);
}

.course-disclosure[open]:not([data-details-motion="ready"]) > summary::after,
.course-disclosure[data-details-state="open"] > summary::after {
  transform: translateY(-35%) rotate(225deg);
}

.course-disclosure[data-details-motion-instant="true"] > summary::after {
  transition: none;
}

.course-disclosure-content {
  padding: 18px 0 8px;
}

.syllabus-card {
  min-width: 0;
}

.syllabus-card h3 {
  margin: 0 0 12px;
  color: var(--ink-strong);
  font-size: 18px;
  font-weight: 730;
  letter-spacing: -0.02em;
  line-height: 1.4;
  word-break: keep-all;
}

.syllabus-card p {
  margin: 4px 0 0;
  color: var(--muted);
  font-size: 13.5px;
  line-height: 1.62;
  word-break: keep-all;
}

.syllabus-card strong {
  color: var(--ink);
  font-weight: 700;
}

.assignment-label {
  display: inline-block;
  margin-top: 13px;
  padding: 5px 8px;
  border: 1px solid var(--line);
  border-radius: 3px;
  color: var(--accent-ink);
  font-family: var(--mono);
  font-size: 10.5px;
  font-weight: 500;
  line-height: 1.5;
}

/* Structured course methodology and feature notes. */

.method-flow,
.feature-grid {
  margin: 0;
  padding: 0;
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 1px;
  background: var(--line);
  border: 1px solid var(--line);
  border-radius: 6px;
  overflow: hidden;
  list-style: none;
}

.method-step,
.feature-card {
  min-width: 0;
  padding: 24px;
  background: var(--paper);
}

.method-step > span,
.feature-label {
  display: block;
  margin-bottom: 14px;
  color: var(--accent-ink);
  font-family: var(--mono);
  font-size: 10px;
  font-weight: 600;
  letter-spacing: 0.03em;
  text-transform: uppercase;
}

.method-step h3,
.feature-card h3 {
  margin: 0;
  color: var(--ink-strong);
  font-size: 17px;
  font-weight: 730;
  letter-spacing: -0.02em;
  line-height: 1.4;
  word-break: keep-all;
}

.method-step p,
.feature-card p {
  margin: 10px 0 0;
  color: var(--muted);
  font-size: 13.5px;
  line-height: 1.7;
  word-break: keep-all;
}

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

.feature-card strong {
  color: var(--ink);
  font-weight: 700;
}

.feature-card code {
  padding: 2px 5px;
  border: 1px solid var(--line);
  border-radius: 3px;
  color: var(--accent-strong);
  font-family: var(--mono);
  font-size: 0.9em;
}

.course-callout,
.course-sources {
  margin-top: 18px;
  padding: 19px 22px;
  border-left: 3px solid var(--accent);
  background: var(--surface);
}

.course-callout p,
.course-sources p {
  margin: 0;
  color: var(--muted);
  font-size: 13.5px;
  line-height: 1.72;
  word-break: keep-all;
}

.course-callout strong,
.course-sources strong {
  color: var(--ink-strong);
  font-weight: 720;
}

.course-callout-split {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 30px;
}

.course-sources ul {
  margin: 14px 0 0;
  padding: 14px 0 0;
  border-top: 1px solid var(--line);
  display: flex;
  flex-wrap: wrap;
  gap: 8px 18px;
  list-style: none;
}

.course-sources a {
  color: var(--accent-ink);
  font-size: 12px;
  font-weight: 650;
}

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

.rubric-card {
  min-width: 0;
  border: 1px solid var(--line);
  border-radius: 6px;
  background: var(--paper);
  overflow: hidden;
}

.rubric-card-heading {
  padding: 20px 22px;
  border-bottom: 1px solid var(--line-strong);
}

.rubric-card-heading span {
  color: var(--accent-ink);
  font-family: var(--mono);
  font-size: 10px;
  font-weight: 600;
  text-transform: uppercase;
}

.rubric-card-heading h3,
.policy-block h3 {
  margin: 7px 0 0;
  color: var(--ink-strong);
  font-size: 18px;
  font-weight: 730;
  letter-spacing: -0.02em;
}

.rubric-card dl {
  margin: 0;
  padding: 8px 22px;
}

.rubric-pending {
  margin: 0;
  padding: 22px;
  color: var(--muted);
  font-size: 13.5px;
  line-height: 1.72;
  word-break: keep-all;
}

.rubric-card dl > div {
  padding: 12px 0;
  border-bottom: 1px solid var(--line);
  display: grid;
  grid-template-columns: minmax(0, 1fr) auto;
  gap: 20px;
}

.rubric-card dl > div:last-child {
  border-bottom: 0;
}

.rubric-card dt,
.rubric-card dd {
  margin: 0;
  font-size: 13px;
  line-height: 1.5;
}

.rubric-card dt {
  color: var(--muted);
}

.rubric-card dd {
  color: var(--accent-ink);
  font-family: var(--mono);
  font-weight: 700;
}

.policy-block {
  margin-top: 18px;
  padding: 22px;
  border: 1px solid var(--line);
  border-radius: 6px;
  background: var(--paper);
}

.policy-block h3 {
  margin-top: 0;
}

.policy-block ul {
  margin: 16px 0 0;
  padding: 0;
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 10px 28px;
  list-style: none;
}

.policy-block li {
  position: relative;
  padding: 11px 0 11px 18px;
  border-top: 1px solid var(--line);
  color: var(--muted);
  font-size: 13.5px;
  line-height: 1.65;
  word-break: keep-all;
}

.policy-block li::before {
  content: "•";
  position: absolute;
  left: 0;
  color: var(--accent-ink);
  font-weight: 700;
}

/* Shared navigation for individual handouts. */

.lesson-header {
  position: sticky;
  top: 0;
  z-index: 60;
  border-bottom: 1px solid var(--line);
  background: color-mix(in srgb, var(--paper) 94%, transparent);
  backdrop-filter: blur(14px);
}

.lesson-header-inner {
  min-height: 58px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 22px;
}

.lesson-breadcrumb,
.lesson-sequence {
  min-width: 0;
  display: flex;
  align-items: center;
  gap: 10px;
}

.lesson-breadcrumb {
  color: var(--quiet);
  font-size: 10px;
  font-weight: 500;
  text-transform: uppercase;
}

.lesson-breadcrumb a {
  color: var(--muted);
  white-space: nowrap;
}

.lesson-breadcrumb .lesson-course {
  max-width: 260px;
  overflow: hidden;
  color: var(--ink-strong);
  font-weight: 600;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.lesson-breadcrumb a:hover,
.lesson-sequence a:hover {
  color: var(--accent-ink);
  text-decoration: none;
}

.lesson-sequence {
  flex: 0 0 auto;
}

.lesson-sequence a {
  padding: 7px 9px;
  border: 1px solid var(--line);
  border-radius: 4px;
  color: var(--muted);
  font-size: 9.5px;
  font-weight: 600;
  text-transform: uppercase;
  white-space: nowrap;
}

.lesson-sequence a:hover {
  border-color: var(--accent-ink);
}

body.teaching-document details[data-details-motion="ready"] > summary {
  position: relative;
  padding-right: 44px;
  list-style: none;
  cursor: pointer;
}

body.teaching-document details[data-details-motion="ready"] > summary::-webkit-details-marker {
  display: none;
}

body.teaching-document details[data-details-motion="ready"] > summary::marker {
  content: "";
}

body.teaching-document details[data-details-motion="ready"] > summary::after {
  content: "";
  position: absolute;
  top: 50%;
  right: 17px;
  width: 8px;
  height: 8px;
  border-right: 2px solid currentColor;
  border-bottom: 2px solid currentColor;
  transform: translateY(-50%) rotate(45deg);
  transform-origin: center;
  transition: transform 160ms var(--ease-out);
}

body.teaching-document details[data-details-state="open"] > summary::after {
  transform: translateY(-50%) rotate(225deg);
}

@media (prefers-reduced-motion: reduce) {
  body.teaching-document details[data-details-motion="ready"] > summary::after {
    transition: none !important;
  }

  .course-jump a:active {
    transform: none;
  }
}

body.teaching-document details[data-details-motion-instant="true"] > summary::after {
  transition: none !important;
}

/* Overrides for generated document templates. */

body.teaching-document .topbar,
body.teaching-document > .site-header {
  display: none;
}

body.teaching-document .hero {
  position: relative;
  overflow: visible;
  border: 0;
  border-bottom: 1px solid var(--line-strong);
  background: var(--paper);
  color: var(--ink);
}

body.teaching-document .hero::after {
  display: none;
}

body.teaching-document .hero-inner {
  width: min(1180px, calc(100% - 48px));
  max-width: none;
  min-height: 0;
  margin: 0 auto;
  padding: 44px 0 38px;
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(250px, 310px);
  gap: 54px;
  align-items: end;
}

body.teaching-document .hero-inner > :only-child {
  grid-column: 1 / -1;
}

body.teaching-document .eyebrow,
body.teaching-document .kicker {
  margin: 0 0 12px;
  color: var(--accent-ink);
  font-family: var(--mono);
  font-size: 10.5px;
  font-weight: 600;
  letter-spacing: 0.03em;
  text-transform: uppercase;
}

body.teaching-document .hero h1 {
  max-width: 820px;
  margin: 0;
  color: var(--ink-strong);
  font-family: var(--sans);
  font-size: clamp(31px, 4.2vw, 50px);
  font-weight: 770;
  letter-spacing: -0.045em;
  line-height: 1.08;
  word-break: keep-all;
}

body.teaching-document .hero .lead,
body.teaching-document .hero-copy {
  max-width: 760px;
  margin: 16px 0 0;
  color: var(--muted);
  font-size: 15px;
  line-height: 1.62;
  word-break: keep-all;
}

body.teaching-document .hero-meta {
  margin-top: 21px;
  display: flex;
  flex-wrap: wrap;
  gap: 8px 18px;
}

body.teaching-document .hero-chip,
body.teaching-document .meta-chip {
  padding: 0;
  border: 0;
  border-radius: 0;
  background: transparent;
  color: var(--quiet);
  font-family: var(--mono);
  font-size: 9.5px;
  font-weight: 500;
  text-transform: uppercase;
}

body.teaching-document .doc-card {
  padding: 0 0 0 20px;
  border: 0;
  border-left: 1px solid var(--line-strong);
  border-radius: 0;
  background: transparent;
  box-shadow: none;
}

body.teaching-document .doc-card-title {
  margin: 0 0 8px;
  color: var(--accent-ink);
  font-family: var(--mono);
  font-size: 9.5px;
  font-weight: 600;
  text-transform: uppercase;
}

body.teaching-document .meta-row {
  padding: 7px 0;
  border-color: var(--line);
  color: var(--ink);
  font-size: 12px;
}

body.teaching-document .meta-key {
  color: var(--quiet);
}

body.teaching-document .meta-value {
  color: var(--ink);
}

body.teaching-document .layout,
body.teaching-document main.layout {
  width: min(1180px, calc(100% - 48px));
  max-width: none;
  margin: 0 auto;
  padding: 42px 0 92px;
  display: grid;
  grid-template-columns: minmax(0, 1fr) 270px;
  gap: 34px;
  align-items: start;
}

body.teaching-document .page,
body.teaching-document main:not(.layout) {
  width: min(1020px, calc(100% - 48px));
  max-width: none;
  margin-inline: auto;
}

body.teaching-document .article {
  min-width: 0;
  padding: 38px;
  border: 1px solid var(--line);
  border-radius: 6px;
  background: var(--paper);
  color: var(--ink);
  box-shadow: var(--shadow);
}

/* Native lesson pages for Contents Programming. */

body.course-contents-programming.teaching-document .article p {
  margin: 0 0 16px;
  word-break: keep-all;
  overflow-wrap: break-word;
}

body.course-contents-programming.teaching-document .article ul,
body.course-contents-programming.teaching-document .article ol {
  margin: 0 0 20px;
  padding-left: 24px;
}

body.course-contents-programming.teaching-document .article li {
  margin: 7px 0;
  word-break: keep-all;
}

body.course-contents-programming.teaching-document .article h2 {
  margin: 52px 0 18px;
  padding-top: 27px;
  border-top: 1px solid var(--line);
  display: flex;
  align-items: baseline;
  gap: 12px;
  counter-increment: lesson-section;
}

body.course-contents-programming.teaching-document .article h2::before {
  content: counter(lesson-section, decimal-leading-zero);
  flex: 0 0 auto;
  min-width: 38px;
  font-size: 11px;
  font-weight: 600;
}

body.course-contents-programming.teaching-document .article h3 {
  margin: 34px 0 12px;
  font-size: 19px;
  line-height: 1.4;
}

body.course-contents-programming.teaching-document .article h4 {
  margin: 24px 0 9px;
  font-size: 16px;
  line-height: 1.45;
}

body.course-contents-programming.teaching-document .article {
  counter-reset: lesson-section;
}

body.course-contents-programming.teaching-document .callout {
  margin: 20px 0 28px;
  padding: 16px 18px;
  border: 1px solid var(--line);
  border-left: 4px solid var(--accent);
  border-radius: 5px;
}

body.course-contents-programming.teaching-document .callout-title {
  margin: 0 0 9px;
  padding: 0;
  font-size: 14px;
  font-weight: 740;
}

body.course-contents-programming.teaching-document .callout > :last-child {
  margin-bottom: 0;
}

body.course-contents-programming.teaching-document .callout-question {
  border-left-color: #496b78;
}

body.course-contents-programming.teaching-document .callout-warning {
  border-left-color: #8b6a35;
}

body.course-contents-programming.teaching-document .callout-success {
  border-left-color: var(--success-ink);
}

body.course-contents-programming.teaching-document .table-wrap {
  width: 100%;
  margin: 18px 0 30px;
  overflow-x: auto;
}

body.course-contents-programming.teaching-document table {
  width: 100%;
  border-collapse: collapse;
  font-size: 14px;
}

body.course-contents-programming.teaching-document caption {
  padding: 0 0 10px;
  color: var(--muted);
  font-size: 12px;
  font-weight: 600;
  line-height: 1.5;
  text-align: left;
}

body.course-contents-programming.teaching-document th,
body.course-contents-programming.teaching-document td {
  padding: 11px 13px;
  border: 1px solid var(--line);
  vertical-align: top;
  line-height: 1.55;
  word-break: keep-all;
}

body.course-contents-programming.teaching-document tbody th[scope="row"] {
  background: var(--surface);
  color: var(--ink-strong);
  font-weight: 650;
  text-align: left;
}

body.course-contents-programming.teaching-document pre {
  margin: 18px 0 26px;
  padding: 17px 19px;
  border: 1px solid var(--line-strong);
  border-left: 4px solid var(--accent);
  border-radius: 5px;
  overflow: auto;
  line-height: 1.6;
}

body.course-contents-programming.teaching-document pre code {
  padding: 0;
  border: 0;
  background: transparent;
  white-space: pre;
}

body.course-contents-programming.teaching-document .lecture-figure {
  margin: 24px 0 32px;
}

body.course-contents-programming.teaching-document .lecture-figure img {
  width: 100%;
  height: auto;
  display: block;
}

body.course-contents-programming.teaching-document figcaption {
  margin-top: 10px;
  font-size: 12px;
  line-height: 1.55;
  text-align: center;
}

body.course-contents-programming.teaching-document .visual-link {
  display: block;
  border-radius: 6px;
}

body.course-contents-programming.teaching-document .visual-link:hover {
  text-decoration: none;
}

body.course-contents-programming.teaching-document .visual-link:hover img {
  border-color: var(--accent-ink);
}

body.course-contents-programming.teaching-document .case-figure figcaption > span {
  display: block;
}

body.course-contents-programming.teaching-document .figure-links {
  margin-top: 7px;
  display: flex;
  justify-content: center;
  flex-wrap: wrap;
  gap: 6px 18px;
}

body.course-contents-programming.teaching-document .figure-links a {
  color: var(--accent-ink);
  font-weight: 650;
}

body.course-contents-programming.teaching-document .official-case-grid {
  margin: 22px 0 30px;
  display: grid;
  gap: 14px;
}

body.course-contents-programming.teaching-document .official-case-card {
  min-width: 0;
  border: 1px solid var(--line);
  border-radius: 6px;
  display: grid;
  grid-template-columns: 1fr;
  overflow: hidden;
  background: var(--paper);
}

body.course-contents-programming.teaching-document .official-case-figure {
  min-width: 0;
  margin: 0;
  padding: 16px;
  border-bottom: 1px solid var(--line);
  background: var(--surface);
}

body.course-contents-programming.teaching-document .official-case-figure a {
  display: block;
}

body.course-contents-programming.teaching-document .official-case-figure img {
  width: 100%;
  height: auto;
  border: 1px solid var(--line);
  display: block;
}

body.course-contents-programming.teaching-document .official-case-figure a:hover img {
  border-color: var(--accent-ink);
}

body.course-contents-programming.teaching-document .official-case-figure figcaption {
  margin-top: 9px;
  text-align: left;
}

body.course-contents-programming.teaching-document .official-case-copy {
  min-width: 0;
  padding: 22px;
}

body.course-contents-programming.teaching-document .case-kicker {
  color: var(--accent-ink);
  font-family: var(--mono);
  font-size: 9.5px;
  font-weight: 600;
  letter-spacing: 0.03em;
}

body.course-contents-programming.teaching-document .official-case-copy h4 {
  margin: 7px 0 10px;
}

body.course-contents-programming.teaching-document .official-case-copy h4 a {
  color: var(--ink-strong);
}

body.course-contents-programming.teaching-document .official-case-copy > p {
  color: var(--muted);
  font-size: 13.5px;
  line-height: 1.7;
}

body.course-contents-programming.teaching-document .case-data-map {
  margin: 15px 0 0;
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 12px;
}

body.course-contents-programming.teaching-document .case-data-map > div {
  padding: 8px 0;
  border-top: 1px solid var(--line);
  display: grid;
  gap: 5px;
}

body.course-contents-programming.teaching-document .case-data-map dt {
  color: var(--accent-ink);
  font-family: var(--mono);
  font-size: 10px;
  font-weight: 600;
}

body.course-contents-programming.teaching-document .case-data-map dd {
  margin: 0;
  color: var(--ink);
  font-size: 12.5px;
  line-height: 1.55;
}

body.course-contents-programming.teaching-document .inline-resource-grid {
  margin: 20px 0 28px;
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 12px;
}

body.course-contents-programming.teaching-document .inline-resource-card {
  min-width: 0;
  padding: 18px;
  border: 1px solid var(--line);
  border-radius: 5px;
  display: grid;
  gap: 6px;
  background: var(--surface);
  color: var(--ink);
}

body.course-contents-programming.teaching-document .inline-resource-card:hover {
  border-color: var(--accent-ink);
  text-decoration: none;
}

body.course-contents-programming.teaching-document .inline-resource-card > span {
  color: var(--accent-ink);
  font-family: var(--mono);
  font-size: 9.5px;
  font-weight: 600;
  text-transform: uppercase;
}

body.course-contents-programming.teaching-document .inline-resource-card strong {
  color: var(--ink-strong);
  font-size: 14px;
}

body.course-contents-programming.teaching-document .inline-resource-card small {
  color: var(--muted);
  font-size: 12px;
  line-height: 1.55;
}

body.course-contents-programming.teaching-document .session-grid {
  margin: 22px 0 30px;
  padding: 0;
  border: 1px solid var(--line);
  border-radius: 6px;
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  overflow: hidden;
  list-style: none;
}

body.course-contents-programming.teaching-document .session-grid li {
  min-width: 0;
  margin: 0;
  padding: 20px;
  border-left: 1px solid var(--line);
  background: var(--surface);
}

body.course-contents-programming.teaching-document .session-grid li:first-child {
  border-left: 0;
}

body.course-contents-programming.teaching-document .session-grid-six li:nth-child(3n + 1) {
  border-left: 0;
}

body.course-contents-programming.teaching-document .session-grid-six li:nth-child(n + 4) {
  border-top: 1px solid var(--line);
}

body.course-contents-programming.teaching-document .session-grid-seven {
  grid-template-columns: repeat(12, minmax(0, 1fr));
}

body.course-contents-programming.teaching-document .session-grid-seven li {
  grid-column: span 3;
}

body.course-contents-programming.teaching-document .session-grid-seven li:nth-child(4n + 1) {
  border-left: 0;
}

body.course-contents-programming.teaching-document .session-grid-seven li:nth-child(n + 5) {
  grid-column: span 4;
  border-top: 1px solid var(--line);
}

body.course-contents-programming.teaching-document .session-label,
body.course-contents-programming.teaching-document .pipeline-label,
body.course-contents-programming.teaching-document .worksheet-label {
  display: block;
  margin-bottom: 9px;
  color: var(--accent-ink);
  font-family: var(--mono);
  font-size: 10px;
  font-weight: 600;
  letter-spacing: 0.03em;
  text-transform: uppercase;
}

body.course-contents-programming.teaching-document .session-grid strong {
  display: block;
  color: var(--ink-strong);
  font-size: 15px;
  line-height: 1.4;
}

body.course-contents-programming.teaching-document .session-grid p {
  margin: 8px 0 0;
  color: var(--muted);
  font-size: 12.5px;
  line-height: 1.6;
}

body.course-contents-programming.teaching-document .pipeline {
  margin: 22px 0 30px;
  display: grid;
  grid-template-columns: minmax(0, 1fr) auto minmax(0, 1fr) auto minmax(0, 1fr);
  gap: 10px;
  align-items: stretch;
}

body.course-contents-programming.teaching-document .pipeline-step {
  min-width: 0;
  padding: 18px;
  border: 1px solid var(--line);
  border-radius: 5px;
  background: var(--paper);
}

body.course-contents-programming.teaching-document .pipeline-step strong {
  color: var(--ink-strong);
  font-size: 15px;
}

body.course-contents-programming.teaching-document .pipeline-step p {
  margin: 7px 0 0;
  color: var(--muted);
  font-size: 12.5px;
  line-height: 1.55;
}

body.course-contents-programming.teaching-document .pipeline-arrow {
  align-self: center;
  color: var(--accent-ink);
  font-family: var(--mono);
  font-weight: 600;
}

body.course-contents-programming.teaching-document .worksheet {
  margin: 20px 0 30px;
  padding: 22px;
  border: 1px dashed var(--line-strong);
  border-radius: 6px;
  background: var(--surface);
}

body.course-contents-programming.teaching-document .worksheet h3,
body.course-contents-programming.teaching-document .worksheet h4 {
  margin-top: 0;
}

body.course-contents-programming.teaching-document .worksheet ol:last-child,
body.course-contents-programming.teaching-document .worksheet ul:last-child {
  margin-bottom: 0;
}

body.course-contents-programming.teaching-document .concept-check-list {
  margin: 18px 0 30px;
  border-top: 1px solid var(--line);
}

body.course-contents-programming.teaching-document .concept-check-list details {
  border-bottom: 1px solid var(--line);
}

body.course-contents-programming.teaching-document .concept-check-list summary {
  padding: 16px 44px 16px 0;
  color: var(--ink-strong);
  font-size: 14px;
  font-weight: 650;
  line-height: 1.55;
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  border: 1px solid var(--line);
  border-radius: 5px;
  background: var(--surface);
}

body.course-contents-programming.teaching-document .change-sequence span,
body.course-contents-programming.teaching-document .change-sequence strong,
body.course-contents-programming.teaching-document .change-sequence small {
  display: block;
}

body.course-contents-programming.teaching-document .change-sequence span {
  margin-bottom: 12px;
  color: var(--accent-ink);
  font-family: var(--mono);
  font-size: 10px;
}

body.course-contents-programming.teaching-document .change-sequence strong {
  color: var(--ink-strong);
  font-size: 13px;
}

body.course-contents-programming.teaching-document .change-sequence small {
  margin-top: 5px;
  color: var(--muted);
  font-size: 11px;
  line-height: 1.5;
}

body.course-contents-programming.teaching-document .check-output {
  border-left: 5px solid var(--success-ink);
}

body.course-contents-programming.teaching-document .check-output p {
  margin: 0;
  color: var(--muted);
  font-family: var(--mono);
  font-size: 12.5px;
  line-height: 1.85;
}

body.course-contents-programming.teaching-document .check-output strong {
  color: var(--ink-strong);
}

body.course-contents-programming.teaching-document .submission-strip {
  margin: 22px 0 30px;
  border: 1px solid var(--line-strong);
  border-radius: 6px;
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  overflow: hidden;
}

body.course-contents-programming.teaching-document .submission-strip span {
  min-width: 0;
  padding: 16px;
  border-left: 1px solid var(--line);
  color: var(--muted);
  font-size: 11.5px;
  line-height: 1.5;
}

body.course-contents-programming.teaching-document .submission-strip span:first-child {
  border-left: 0;
}

body.course-contents-programming.teaching-document .submission-strip strong {
  display: block;
  margin-bottom: 5px;
  color: var(--accent-ink);
  font-family: var(--mono);
  font-size: 10px;
}

@media (hover: hover) and (pointer: fine) {
  a.material-card:hover {
    padding-inline: 10px;
    background: color-mix(in srgb, var(--accent-soft) 54%, transparent);
    text-decoration: none;
  }
}

@media (max-width: 980px) {
  .archive-hero {
    grid-template-columns: 1fr;
    gap: 24px;
  }

  .featured-course {
    grid-template-columns: 1fr;
  }

  .featured-course-visual {
    min-height: 340px;
  }

  .course-hero-inner {
    grid-template-columns: 1fr;
    gap: 34px;
  }

  .course-visual {
    height: min(48vw, 380px);
  }

  body.teaching-document .hero-inner {
    grid-template-columns: 1fr;
    gap: 28px;
  }

  body.teaching-document .layout,
  body.teaching-document main.layout {
    grid-template-columns: 1fr;
  }

  body.teaching-document .toc {
    position: static;
    order: -1;
    max-height: 280px;
  }
}

@media (max-width: 760px) {
  .nav {
    width: 100%;
    min-height: 0;
    padding: 13px 16px 12px;
    display: grid;
    grid-template-columns: repeat(5, auto);
    justify-content: space-between;
    gap: 10px 12px;
  }

  .nav .brand {
    grid-column: 1 / -1;
    margin: 0 0 4px;
  }

  .nav a:not(.brand) {
    font-size: 11.5px;
  }

  .teaching-shell,
  .course-hero-inner,
  .course-content,
  .archive-hero,
  .lesson-header-inner {
    width: min(100% - 32px, 1180px);
  }

  .archive-hero {
    padding: 58px 0 42px;
  }

  .archive-hero h1,
  .course-hero h1 {
    font-size: clamp(38px, 12vw, 54px);
  }

  .archive-heading,
  .teaching-area {
    grid-template-columns: 1fr;
    gap: 10px;
  }

  .featured-course {
    min-height: 0;
  }

  .featured-course-visual {
    min-height: 240px;
  }

  .featured-course-copy,
  .course-card-copy {
    padding: 24px;
  }

  .course-grid {
    grid-template-columns: 1fr;
  }

  .course-card {
    grid-template-rows: 220px 1fr;
  }

  .archive-footer,
  .course-footer {
    display: grid;
  }

  .course-hero-inner {
    min-height: 0;
    padding: 46px 0 36px;
  }

  .course-visual {
    height: 230px;
  }

  .course-jump-wrap {
    top: 88px;
  }

  .course-jump {
    width: 100%;
    padding-inline: 4px;
  }

  .course-content,
  .page.course-content {
    padding: 42px 0 76px;
  }

  .course-section-heading {
    display: grid;
    gap: 8px;
  }

  .course-disclosure > summary .course-section-title {
    display: grid;
    gap: 8px;
  }

  .course-section-note {
    text-align: left;
  }

  .week-group,
  .day-group {
    grid-template-columns: 1fr;
    gap: 18px;
  }

  .method-flow,
  .feature-grid,
  .course-callout-split,
  .rubric-grid,
  .policy-block ul {
    grid-template-columns: 1fr;
  }

  .week-heading-topic,
  .day-heading-topic {
    margin-top: 5px;
  }

  .material-card,
  .course-feature-link {
    grid-template-columns: 1fr auto;
    gap: 8px 18px;
  }

  .material-kind,
  .week {
    grid-column: 1 / -1;
    padding-top: 0;
  }

  .course-feature-link .material-kind {
    grid-column: 1 / -1;
  }

  .lesson-header-inner {
    min-height: 68px;
  }

  .lesson-breadcrumb .lesson-home,
  .lesson-breadcrumb > span:first-of-type,
  .lesson-sequence .sequence-label {
    display: none;
  }

  .lesson-breadcrumb .lesson-course {
    max-width: 150px;
  }

  .lesson-sequence {
    gap: 6px;
  }

  .lesson-sequence a {
    padding: 7px 8px;
  }

  body.teaching-document .hero-inner,
  body.teaching-document .layout,
  body.teaching-document main.layout,
  body.teaching-document .page,
  body.teaching-document main:not(.layout) {
    width: min(100% - 32px, 1180px);
  }

  body.teaching-document .hero-inner {
    padding: 34px 0 30px;
  }

  body.teaching-document .hero h1 {
    font-size: 32px;
  }

  body.teaching-document .doc-card {
    display: none;
  }

  body.teaching-document .layout,
  body.teaching-document main.layout {
    padding: 28px 0 70px;
  }

  body.teaching-document .article {
    padding: 25px 20px;
  }

  body.teaching-document .article .document-title,
  body.teaching-document .article h1 {
    font-size: 25px;
  }

  body.teaching-document .article h2 {
    font-size: 20px;
  }

  body.course-contents-programming.teaching-document .case-data-map {
    grid-template-columns: 1fr;
    gap: 0;
  }

  body.course-contents-programming.teaching-document .session-grid {
    grid-template-columns: 1fr;
  }

  body.course-contents-programming.teaching-document .session-grid li {
    border-top: 1px solid var(--line);
    border-left: 0;
  }

  body.course-contents-programming.teaching-document .session-grid li:first-child {
    border-top: 0;
  }

  body.course-contents-programming.teaching-document .session-grid-seven li {
    grid-column: auto;
  }

  body.course-contents-programming.teaching-document .pipeline {
    grid-template-columns: 1fr;
  }

  body.course-contents-programming.teaching-document .pipeline-arrow {
    display: none;
  }

  body.course-contents-programming.teaching-document .execution-model,
  body.course-contents-programming.teaching-document .value-contrast,
  body.course-contents-programming.teaching-document .notebook-model,
  body.course-contents-programming.teaching-document .assignment-visual,
  body.course-contents-programming.teaching-document .trace-board,
  body.course-contents-programming.teaching-document .type-grid,
  body.course-contents-programming.teaching-document .profile-mapping,
  body.course-contents-programming.teaching-document .generated-profile-grid,
  body.course-contents-programming.teaching-document .error-reading {
    grid-template-columns: 1fr;
  }

  body.course-contents-programming.teaching-document .profile-mapping > div,
  body.course-contents-programming.teaching-document .profile-mapping > div:nth-child(odd) {
    border-top: 1px solid var(--line);
    border-left: 0;
  }

  body.course-contents-programming.teaching-document .profile-mapping > div:first-child {
    border-top: 0;
  }

  body.course-contents-programming.teaching-document .execution-stage:not(:last-child)::after {
    display: none;
  }

  body.course-contents-programming.teaching-document .code-line {
    grid-template-columns: 32px minmax(0, 1fr);
  }

  body.course-contents-programming.teaching-document .code-source {
    border-right: 0;
  }

  body.course-contents-programming.teaching-document .line-meaning {
    grid-column: 1 / -1;
    border-top: 1px solid var(--line);
  }

  body.course-contents-programming.teaching-document .lesson-visual {
    padding: 17px;
  }

  body.course-contents-programming.teaching-document .worksheet {
    padding: 18px;
  }

  body.course-contents-programming.teaching-document .inline-resource-grid {
    grid-template-columns: 1fr;
  }

  body.course-contents-programming.teaching-document > .footer-note {
    width: min(100% - 32px, 1180px);
  }
}

@media (max-width: 760px) {
  body.course-contents-programming.teaching-document .goal-contract,
  body.course-contents-programming.teaching-document .exit-gate,
  body.course-contents-programming.teaching-document .calculation-map {
    grid-template-columns: 1fr;
  }

  body.course-contents-programming.teaching-document .goal-contract-note {
    padding: 14px 0 0;
    border-top: 1px solid var(--line);
    border-left: 0;
  }

  body.course-contents-programming.teaching-document .mission-route,
  body.course-contents-programming.teaching-document .change-sequence,
  body.course-contents-programming.teaching-document .submission-strip {
    grid-template-columns: 1fr;
  }

  body.course-contents-programming.teaching-document .mission-route li,
  body.course-contents-programming.teaching-document .mission-route li:nth-child(3n + 1),
  body.course-contents-programming.teaching-document .submission-strip span,
  body.course-contents-programming.teaching-document .submission-strip span:first-child {
    border-top: 1px solid var(--line);
    border-left: 0;
  }

  body.course-contents-programming.teaching-document .mission-route li:first-child,
  body.course-contents-programming.teaching-document .submission-strip span:first-child {
    border-top: 0;
  }

  body.course-contents-programming.teaching-document .exit-pass {
    width: 76px;
  }

  body.course-contents-programming.teaching-document .completion-criteria li {
    grid-template-columns: 28px minmax(0, 1fr);
  }

  body.course-contents-programming.teaching-document .completion-criteria span {
    grid-column: 2;
  }

  body.course-contents-programming.teaching-document .calculation-map > span {
    justify-self: start;
  }
}

@media (max-width: 420px) {
  .nav {
    gap: 10px 8px;
  }

  .nav a:not(.brand) {
    font-size: 10.5px;
  }

  .lesson-breadcrumb .lesson-course {
    max-width: 145px;
  }
}

@media (prefers-color-scheme: dark) {
  :root {
    color-scheme: dark;
    --bg: #272727;
    --paper: #2f2f2f;
    --surface: #353535;
    --surface-strong: #3d3d3d;
    --ink: #eff1f3;
    --ink-strong: #eff1f3;
    --muted: #a8a6b0;
    --quiet: #8e8c96;
    --line: rgba(239, 241, 243, 0.14);
    --line-strong: rgba(239, 241, 243, 0.28);
    --accent: #fed766;
    --accent-strong: #ffe28a;
    --accent-soft: #3d3620;
    --accent-ink: #fed766;
    --link: #4ec8d9;
    --error-ink: #f2aaa3;
    --success-ink: #9fcfa6;
    --shadow: 0 20px 52px rgba(0, 0, 0, 0.24);
  }

  .featured-course-visual img,
  .course-card-visual img,
  .course-visual img {
    filter: brightness(0.86) saturate(0.9);
  }

  body.teaching-document th {
    background: #26393d;
    color: var(--ink-strong);
  }

  body.teaching-document .callout-warning,
  body.teaching-document .callout-question,
  body.teaching-document .callout-success,
  body.teaching-document .break,
  body.teaching-document .work,
  body.teaching-document .review {
    background: var(--surface);
    color: var(--ink);
  }
}

@media print {
  .site-header,
  .course-jump-wrap,
  .lesson-header,
  body.teaching-document .toc {
    display: none;
  }

  body.teaching-index,
  body.teaching-document,
  body.teaching-document .hero,
  body.teaching-document .article {
    background: #fff;
    color: #000;
  }

  body.teaching-document .layout,
  body.teaching-document main.layout {
    width: 100%;
    display: block;
    padding: 0;
  }

  body.teaching-document .article {
    padding: 0;
    border: 0;
    box-shadow: none;
  }
}

/* Week 10: readable long-form hierarchy and goal-based map mission. */

html.week-10-root {
  scroll-behavior: auto;
}

body.week-10-document .article h2 {
  display: block;
  counter-increment: none;
}

body.week-10-document .article h2::before {
  content: none;
  display: none;
}

body.week-10-document summary:active {
  transform: none;
}

body.week-10-document .lesson-visual-link {
  border-radius: 4px;
  display: block;
  color: var(--ink);
  outline-offset: 5px;
}

body.week-10-document .lesson-visual-link:hover {
  text-decoration: none;
}

body.week-10-document .lesson-visual-link img {
  width: 100%;
  height: auto;
  display: block;
}

body.week-10-document .lesson-visual-action {
  min-height: 44px;
  padding: 10px 0 0;
  display: inline-flex;
  align-items: center;
  color: var(--accent-strong);
  font-size: 12px;
  font-weight: 700;
}

body.week-10-document .inline-resource-card {
  transition:
    transform 140ms var(--ease-out),
    border-color 160ms ease;
}

body.week-10-document .inline-resource-card:active {
  transform: scale(0.985);
}

body.week-10-document .mission-progress {
  position: sticky;
  top: 72px;
  z-index: 6;
  margin: 18px 0 0;
  padding: 10px 12px;
  border: 1px solid var(--line-strong);
  border-radius: 5px;
  display: flex;
  justify-content: space-between;
  gap: 16px;
  align-items: center;
  background: var(--paper);
  background: color-mix(in srgb, var(--paper) 94%, transparent);
  backdrop-filter: blur(10px);
  -webkit-backdrop-filter: blur(10px);
}

body.week-10-document .mission-progress p {
  margin: 0;
  display: flex;
  gap: 10px;
  align-items: baseline;
}

body.week-10-document .mission-progress span {
  color: var(--quiet);
  font-family: var(--mono);
  font-size: 12px;
  font-weight: 650;
  line-height: 1.35;
  text-transform: uppercase;
}

body.week-10-document .mission-progress strong {
  color: var(--ink-strong);
  font-size: 14px;
}

body.week-10-document .mission-progress[data-complete="true"] {
  border-color: var(--success-ink);
}

body.week-10-document .mission-progress[data-complete="true"] strong {
  color: var(--success-ink);
}

body.week-10-document .mission-progress button {
  min-height: 44px;
  padding: 0 13px;
  border: 1px solid var(--line-strong);
  border-radius: 4px;
  background: var(--surface);
  color: var(--ink);
  font: 650 12px/1.35 var(--sans);
  cursor: pointer;
  transition:
    transform 140ms var(--ease-out),
    border-color 160ms ease;
}

body.week-10-document .mission-progress button:active {
  transform: scale(0.97);
}

body.week-10-document .completion-criteria li {
  min-height: 72px;
  grid-template-columns: 44px minmax(0, 1fr);
  gap: 10px;
  align-items: center;
  counter-increment: none;
}

body.week-10-document .completion-criteria li::before {
  content: none;
  display: none;
}

body.week-10-document .completion-check {
  width: 20px;
  height: 20px;
  margin: 0;
  justify-self: center;
  accent-color: var(--accent-ink);
  cursor: pointer;
}

body.week-10-document .completion-criteria label {
  min-height: 56px;
  display: grid;
  gap: 4px;
  align-content: center;
  cursor: pointer;
}

body.week-10-document .completion-criteria label span {
  grid-column: auto;
}

body.week-10-document .completion-criteria li[data-checked="true"] strong {
  color: var(--success-ink);
}

@media (hover: hover) and (pointer: fine) {
  body.week-10-document .inline-resource-card:not(:active):hover {
    border-color: var(--accent-ink);
    transform: translateY(-1px);
  }

  body.week-10-document .mission-progress button:not(:active):hover {
    border-color: var(--accent-ink);
  }
}

@media (hover: none), (pointer: coarse) {
  body.week-10-document .inline-resource-card:not(:active):hover {
    border-color: var(--line);
    transform: none;
  }
}

@media (prefers-color-scheme: dark) {
  body.week-10-document .lesson-visual-link img {
    filter: brightness(0.88) contrast(1.08);
  }
}

@media (prefers-reduced-transparency: reduce) {
  body.week-10-document .mission-progress {
    background: var(--paper);
    backdrop-filter: none;
    -webkit-backdrop-filter: none;
  }
}

@media (prefers-reduced-motion: reduce) {
  body.week-10-document .inline-resource-card,
  body.week-10-document .mission-progress button {
    transition: none;
  }

  body.week-10-document .inline-resource-card:active,
  body.week-10-document .mission-progress button:active {
    transform: none;
  }
}

@media (max-width: 760px) {
  body.week-10-document .mission-progress {
    top: 66px;
  }
}

@media (max-width: 420px) {
  body.week-10-document .mission-progress {
    align-items: stretch;
  }

  body.week-10-document .mission-progress p {
    display: grid;
    gap: 2px;
  }
}

@media print {
  body.week-10-document .mission-progress {
    position: static;
    background: transparent;
  }

  body.week-10-document .mission-progress button {
    display: none;
  }
}

/* Week 11: honest visual encoding, chart construction, and poster mission. */

html.week-11-root {
  scroll-behavior: auto;
}

body.course-contents-programming.teaching-document.week-11-document .article h2 {
  display: block;
  counter-increment: none;
}

body.course-contents-programming.teaching-document.week-11-document .article h2::before {
  content: none;
  display: none;
}

body.course-contents-programming.teaching-document.week-11-document .article img {
  max-width: 100%;
  height: auto;
  display: block;
}

body.course-contents-programming.teaching-document.week-11-document .hero-visual-link {
  min-width: 0;
  border: 1px solid var(--line-strong);
  border-radius: 6px;
  display: grid;
  grid-template-rows: minmax(0, 1fr) auto;
  overflow: hidden;
  background: var(--surface);
  color: var(--ink);
  text-decoration: none;
  transition: transform 140ms cubic-bezier(0.22, 1, 0.36, 1);
}

body.course-contents-programming.teaching-document.week-11-document .hero-visual-image {
  width: 100%;
  height: 190px;
  border: 0;
  border-radius: 0;
  object-fit: cover;
  object-position: center;
}

body.course-contents-programming.teaching-document.week-11-document .hero-visual-portrait .hero-visual-image {
  object-position: center 12%;
}

body.course-contents-programming.teaching-document.week-11-document .hero-visual-caption {
  padding: 11px 13px;
  border-top: 1px solid var(--line);
  display: flex;
  justify-content: space-between;
  gap: 12px;
  align-items: baseline;
}

body.course-contents-programming.teaching-document.week-11-document .hero-visual-caption strong,
body.course-contents-programming.teaching-document.week-11-document .hero-visual-caption small {
  line-height: 1.4;
}

body.course-contents-programming.teaching-document.week-11-document .hero-visual-caption strong {
  color: var(--ink-strong);
  font-size: 12px;
}

body.course-contents-programming.teaching-document.week-11-document .hero-visual-caption small {
  color: var(--accent-ink);
  font-family: var(--mono);
  font-size: 9.5px;
}

body.course-contents-programming.teaching-document.week-11-document .hero-visual-link:active {
  transform: scale(0.99);
}

body.course-contents-programming.teaching-document.week-11-document .article {
  padding: 0;
  border: 0;
  background: transparent;
  box-shadow: none;
}

body.course-contents-programming.teaching-document.week-11-document .article .document-title {
  max-width: 680px;
  margin: 0 0 28px;
  color: var(--muted);
  font-size: 18px;
  font-weight: 650;
  letter-spacing: -0.018em;
  line-height: 1.5;
}

body.course-contents-programming.teaching-document.week-11-document .callout-abstract,
body.course-contents-programming.teaching-document.week-11-document .callout-info,
body.course-contents-programming.teaching-document.week-11-document details.callout-question {
  border-right: 0;
  border-left: 0;
  border-radius: 0;
  background: transparent;
  box-shadow: none;
}

body.course-contents-programming.teaching-document.week-11-document .callout-abstract,
body.course-contents-programming.teaching-document.week-11-document .callout-info {
  padding: 19px 0;
  border-top: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
}

body.course-contents-programming.teaching-document.week-11-document details.callout-question {
  padding: 0;
  border-top: 1px solid var(--line);
  border-bottom: 0;
}

body.course-contents-programming.teaching-document.week-11-document details.callout-question > summary {
  padding: 15px 34px 15px 0;
}

body.course-contents-programming.teaching-document.week-11-document details.callout-question > :not(summary) {
  padding: 0 0 16px;
}

body.course-contents-programming.teaching-document.week-11-document .course-footer {
  width: min(1180px, calc(100% - 48px));
  margin: -48px auto 42px;
}

body.course-contents-programming.teaching-document.week-11-document summary:active {
  transform: none;
}

body.course-contents-programming.teaching-document.week-11-document .resource-primary {
  grid-column: 1 / -1;
  padding-block: 22px;
  border-color: var(--accent-ink);
}

body.course-contents-programming.teaching-document.week-11-document .inline-resource-card {
  text-decoration: none;
  transition: transform 140ms cubic-bezier(0.22, 1, 0.36, 1);
}

body.course-contents-programming.teaching-document.week-11-document .inline-resource-card:active {
  transform: scale(0.985);
}

body.course-contents-programming.teaching-document.week-11-document .submission-strip {
  grid-template-columns: repeat(2, minmax(0, 1fr));
}

body.course-contents-programming.teaching-document.week-11-document .completion-criteria {
  padding-left: 42px;
  list-style: decimal-leading-zero;
  counter-reset: none;
}

body.course-contents-programming.teaching-document.week-11-document .completion-criteria li {
  padding: 14px 4px;
  display: list-item;
  counter-increment: none;
}

body.course-contents-programming.teaching-document.week-11-document .completion-criteria li::before {
  content: none;
  display: none;
}

body.course-contents-programming.teaching-document.week-11-document .completion-criteria li::marker {
  color: var(--accent-ink);
  font-family: var(--mono);
  font-size: 10px;
  font-weight: 650;
}

body.course-contents-programming.teaching-document.week-11-document .completion-criteria p,
body.course-contents-programming.teaching-document.week-11-document .completion-criteria strong {
  display: block;
}

body.course-contents-programming.teaching-document.week-11-document .completion-criteria p {
  margin: 0;
  color: var(--muted);
  font-size: 13px;
  line-height: 1.6;
}

body.course-contents-programming.teaching-document.week-11-document .check-output {
  margin: 22px 0 30px;
  padding: 22px;
  border: 1px solid var(--line-strong);
  border-left: 5px solid var(--success-ink);
  border-radius: 6px;
  background: var(--surface);
}

body.course-contents-programming.teaching-document.week-11-document .check-output h2 {
  margin: 7px 0 16px;
  padding: 0;
  border: 0;
  font-size: 20px;
}

body.course-contents-programming.teaching-document.week-11-document .pass-output-list {
  margin: 0;
  padding: 0;
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 8px 22px;
  list-style: none;
}

body.course-contents-programming.teaching-document.week-11-document .pass-output-list li {
  margin: 0;
  display: grid;
  grid-template-columns: 8px minmax(0, 1fr);
  gap: 9px;
  align-items: baseline;
  color: var(--muted);
  font-size: 12.5px;
  line-height: 1.55;
}

body.course-contents-programming.teaching-document.week-11-document .pass-output-list li::before {
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--success-ink);
  content: "";
}

body.course-contents-programming.teaching-document.week-11-document .check-output .pass-complete {
  margin: 18px 0 0;
  padding-top: 16px;
  border-top: 1px solid var(--line);
  display: flex;
  justify-content: space-between;
  gap: 14px;
  align-items: baseline;
  color: var(--muted);
  font: 12px/1.55 var(--sans);
}

body.course-contents-programming.teaching-document.week-11-document .pass-complete strong {
  color: var(--success-ink);
  font-family: var(--mono);
  letter-spacing: 0.02em;
}

@media (hover: hover) and (pointer: fine) {
  body.course-contents-programming.teaching-document.week-11-document .hero-visual-link:not(:active):hover {
    border-color: var(--accent-ink);
    transform: translateY(-1px);
  }

  body.course-contents-programming.teaching-document.week-11-document .inline-resource-card:not(:active):hover {
    border-color: var(--accent-ink);
    transform: translateY(-1px);
  }
}

@media (hover: none), (pointer: coarse) {
  body.course-contents-programming.teaching-document.week-11-document .hero-visual-link:not(:active):hover {
    border-color: var(--line-strong);
    transform: none;
  }

  body.course-contents-programming.teaching-document.week-11-document .inline-resource-card:not(:active):hover {
    border-color: var(--line);
    transform: none;
  }

  body.course-contents-programming.teaching-document.week-11-document .resource-primary:not(:active):hover {
    border-color: var(--accent-ink);
  }
}

@media (prefers-reduced-motion: reduce) {
  body.course-contents-programming.teaching-document.week-11-document .hero-visual-link,
  body.course-contents-programming.teaching-document.week-11-document .inline-resource-card {
    transition: none;
  }

  body.course-contents-programming.teaching-document.week-11-document .hero-visual-link:active,
  body.course-contents-programming.teaching-document.week-11-document .inline-resource-card:active {
    transform: none;
  }
}

@media (max-width: 980px) {
  body.course-contents-programming.teaching-document.week-11-document .hero-inner {
    grid-template-columns: minmax(0, 1fr) minmax(240px, 0.55fr);
    gap: 32px;
    align-items: center;
  }

  body.course-contents-programming.teaching-document.week-11-document .toc {
    position: sticky;
    top: 68px;
    z-index: 7;
    order: -1;
    max-height: none;
    overflow-x: auto;
    overflow-y: hidden;
    padding: 8px;
    display: flex;
    gap: 4px;
    align-items: center;
    scrollbar-width: thin;
  }

  body.course-contents-programming.teaching-document.week-11-document .toc-title {
    margin: 0 6px 0 2px;
    flex: 0 0 auto;
    white-space: nowrap;
  }

  body.course-contents-programming.teaching-document.week-11-document .toc > a,
  body.course-contents-programming.teaching-document.week-11-document .toc li,
  body.course-contents-programming.teaching-document.week-11-document .toc ol {
    flex: 0 0 auto;
  }

  body.course-contents-programming.teaching-document.week-11-document .toc > a,
  body.course-contents-programming.teaching-document.week-11-document .toc li a {
    white-space: nowrap;
  }

  body.course-contents-programming.teaching-document.week-11-document .toc ol {
    width: max-content;
    display: flex;
    gap: 4px;
  }

  body.course-contents-programming.teaching-document.week-11-document .article h2,
  body.course-contents-programming.teaching-document.week-11-document .article h3 {
    scroll-margin-top: 142px;
  }
}

@media (max-width: 760px) {
  body.course-contents-programming.teaching-document.week-11-document .hero-inner {
    grid-template-columns: 1fr;
    gap: 22px;
  }

  body.course-contents-programming.teaching-document.week-11-document .hero-visual-image {
    height: 160px;
  }

  body.course-contents-programming.teaching-document.week-11-document .toc {
    top: 69px;
  }

  body.course-contents-programming.teaching-document.week-11-document .submission-strip,
  body.course-contents-programming.teaching-document.week-11-document .pass-output-list {
    grid-template-columns: 1fr;
  }

  body.course-contents-programming.teaching-document.week-11-document .check-output .pass-complete {
    display: grid;
  }

  body.course-contents-programming.teaching-document.week-11-document .course-footer {
    width: min(100% - 32px, 1180px);
  }
}

@media print {
  body.course-contents-programming.teaching-document.week-11-document .toc {
    display: none;
  }

  body.course-contents-programming.teaching-document.week-11-document .course-footer {
    width: 100%;
    margin: 32px 0 0;
  }
}

/* Week 13: sound-analysis reading and a persistent goal-based mission. */

html.week-13-root {
  scroll-behavior: auto;
}

body.week-13-document .article h2 {
  display: block;
  counter-increment: none;
}

body.week-13-document .article h2::before {
  content: none;
  display: none;
}

body.week-13-document .article img {
  max-width: 100%;
  height: auto;
  display: block;
}

body.week-13-document .lesson-visual img,
body.week-13-document .lesson-figure img {
  width: 100%;
}

body.week-13-document .lesson-figure a {
  display: block;
}

body.week-13-document .goal-contract-copy,
body.week-13-document .exit-gate-copy {
  min-width: 0;
}

body.week-13-document .week-13-toc > summary {
  margin: 0;
  list-style: none;
  cursor: pointer;
}

body.week-13-document .week-13-toc > summary::-webkit-details-marker {
  display: none;
}

body.week-13-document .toc-group-title {
  margin: 15px 9px 6px;
  color: var(--quiet);
  font-family: var(--mono);
  font-size: 9.5px;
  font-weight: 650;
  letter-spacing: 0.03em;
  text-transform: uppercase;
}

body.week-13-document .toc-group-title:first-child {
  margin-top: 12px;
}

body.week-13-document .inline-resource-card {
  transition:
    transform 140ms var(--ease-out),
    border-color 160ms ease;
}

body.week-13-document .inline-resource-card:active {
  transform: scale(0.985);
}

body.week-13-document .mission-progress {
  position: sticky;
  top: 72px;
  z-index: 6;
  margin: 18px 0 0;
  padding: 10px 12px;
  border: 1px solid var(--line-strong);
  border-radius: 5px;
  display: flex;
  justify-content: space-between;
  gap: 16px;
  align-items: center;
  background: var(--paper);
  background: color-mix(in srgb, var(--paper) 94%, transparent);
  backdrop-filter: blur(10px);
  -webkit-backdrop-filter: blur(10px);
}

body.week-13-document .mission-progress p {
  margin: 0;
  display: flex;
  gap: 10px;
  align-items: baseline;
}

body.week-13-document .mission-progress span {
  color: var(--quiet);
  font-family: var(--mono);
  font-size: 12px;
  font-weight: 650;
  line-height: 1.35;
}

body.week-13-document .mission-progress strong {
  color: var(--ink-strong);
  font-size: 14px;
}

body.week-13-document .mission-progress[data-complete="true"] {
  border-color: var(--success-ink);
}

body.week-13-document .mission-progress[data-complete="true"] strong {
  color: var(--success-ink);
}

body.week-13-document .mission-progress button {
  min-height: 44px;
  padding: 0 13px;
  border: 1px solid var(--line-strong);
  border-radius: 4px;
  background: var(--surface);
  color: var(--ink);
  font: 650 12px/1.35 var(--sans);
  cursor: pointer;
  transition:
    transform 140ms var(--ease-out),
    border-color 160ms ease;
}

body.week-13-document .mission-progress button:active {
  transform: scale(0.97);
}

body.week-13-document .mission-progress-note {
  margin: 9px 0 18px;
  color: var(--muted);
  font-size: 12px;
  line-height: 1.6;
}

body.week-13-document .completion-criteria li {
  min-height: 72px;
  grid-template-columns: 44px minmax(0, 1fr);
  gap: 10px;
  align-items: center;
  counter-increment: none;
}

body.week-13-document .completion-criteria li::before {
  content: none;
  display: none;
}

body.week-13-document .completion-check {
  width: 20px;
  height: 20px;
  margin: 0;
  justify-self: center;
  accent-color: var(--accent-ink);
  cursor: pointer;
}

body.week-13-document .completion-criteria label {
  min-height: 56px;
  display: grid;
  gap: 4px;
  align-content: center;
  cursor: pointer;
}

body.week-13-document .completion-criteria label span {
  grid-column: auto;
}

body.week-13-document .completion-criteria li[data-checked="true"] strong {
  color: var(--success-ink);
}

@media (hover: hover) and (pointer: fine) {
  body.week-13-document .inline-resource-card:not(:active):hover {
    border-color: var(--accent-ink);
    transform: translateY(-1px);
  }

  body.week-13-document .mission-progress button:not(:active):hover {
    border-color: var(--accent-ink);
  }
}

@media (hover: none), (pointer: coarse) {
  body.week-13-document .inline-resource-card:not(:active):hover {
    border-color: var(--line);
    transform: none;
  }
}

@media (prefers-color-scheme: dark) {
  body.week-13-document .lesson-visual img,
  body.week-13-document .lesson-figure img {
    filter: brightness(0.88) contrast(1.08);
  }
}

@media (prefers-reduced-transparency: reduce) {
  body.week-13-document .mission-progress {
    background: var(--paper);
    backdrop-filter: none;
    -webkit-backdrop-filter: none;
  }
}

@media (prefers-reduced-motion: reduce) {
  body.week-13-document .inline-resource-card,
  body.week-13-document .mission-progress button {
    transition: none;
  }

  body.week-13-document .inline-resource-card:active,
  body.week-13-document .mission-progress button:active {
    transform: none;
  }
}

@media (max-width: 980px) {
  body.week-13-document .week-13-toc {
    max-height: none;
    padding: 0;
    overflow: visible;
  }

  body.week-13-document .week-13-toc > summary {
    min-height: 48px;
    padding: 16px 48px 16px 16px;
    display: flex;
    align-items: center;
  }

  body.week-13-document .week-13-toc nav {
    max-height: min(58vh, 520px);
    padding: 0 10px 14px;
    overflow: auto;
  }
}

@media (max-width: 760px) {
  body.week-13-document .doc-card {
    padding: 15px 16px;
    border: 1px solid var(--line-strong);
    border-radius: 5px;
    display: block;
    background: var(--surface);
  }

  body.week-13-document .doc-card .meta-row {
    display: grid;
    grid-template-columns: minmax(76px, 0.32fr) minmax(0, 1fr);
    gap: 12px;
  }

  body.week-13-document .mission-progress {
    top: 66px;
  }
}

@media (max-width: 420px) {
  body.week-13-document .mission-progress {
    align-items: stretch;
  }

  body.week-13-document .mission-progress p {
    display: grid;
    gap: 2px;
  }
}

@media print {
  body.week-13-document .mission-progress {
    position: static;
    background: transparent;
  }

  body.week-13-document .mission-progress button {
    display: none;
  }
}