:root {
  color-scheme: light;
  --ink: #1b1f2a;
  --muted: #5f6675;
  --line: #d9dee8;
  --paper: #fffdf8;
  --surface: #f5f7fb;
  --accent: #176b87;
  --accent-2: #9b4d1b;
  --audience-color: #5f6675;
  --audience-soft: #f2f4f7;
}

*,
*::before,
*::after {
  box-sizing: border-box;
}

body {
  margin: 0;
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  background: var(--paper);
  color: var(--ink);
  line-height: 1.6;
}

body.audience-student {
  --audience-color: #176b87;
  --audience-soft: #eef8fb;
}

body.audience-teacher {
  --audience-color: #2f6f4e;
  --audience-soft: #eef7f1;
}

body.audience-support {
  --audience-color: #7a5200;
  --audience-soft: #fff7df;
}

body.audience-mixed {
  --audience-color: #525866;
  --audience-soft: #f1f3f6;
}

body.audience-teacher main h1:first-of-type,
body.audience-support main h1:first-of-type,
body.audience-mixed main h1:first-of-type,
body.audience-teacher .reference-group > h2,
body.audience-support .reference-group > h2,
body.audience-mixed .reference-group > h2 {
  color: var(--audience-color);
}

body.audience-teacher .book-start-actions a.primary,
body.audience-support .book-start-actions a.primary,
body.audience-mixed .book-start-actions a.primary {
  background: var(--audience-color);
}

main,
nav,
header,
footer,
section,
aside,
div {
  min-width: 0;
}

p,
li,
label,
button,
summary,
figcaption,
th,
td {
  overflow-wrap: anywhere;
}

button,
input,
select,
textarea {
  max-width: 100%;
}

.topbar {
  position: sticky;
  top: 0;
  z-index: 2;
  border-bottom: 1px solid var(--line);
  background: rgba(255, 253, 248, 0.94);
  backdrop-filter: blur(8px);
  display: flex;
  gap: 16px;
  align-items: baseline;
  justify-content: space-between;
  padding: 14px 24px;
}

.topbar-title {
  align-items: baseline;
  display: flex;
  flex-wrap: wrap;
  gap: 3px 10px;
}

.audience-context-bar {
  background: var(--audience-soft);
  border-bottom: 1px solid var(--line);
  border-top: 4px solid var(--audience-color);
  line-height: 1.2;
  padding: 6px 24px;
}

.audience-badge {
  background: var(--audience-soft);
  border-left: 4px solid var(--audience-color);
  color: var(--audience-color);
  display: none;
  font-size: 0.78rem;
  font-weight: 800;
  padding: 3px 7px;
}

body.audience-shared .audience-badge-shared,
body.audience-student .audience-badge-student,
body.audience-teacher .audience-badge-teacher,
body.audience-support .audience-badge-support,
body.audience-mixed .audience-badge-mixed {
  display: inline-block;
}

body.audience-student .audience-badge-shared,
body.audience-teacher .audience-badge-shared,
body.audience-support .audience-badge-shared,
body.audience-mixed .audience-badge-shared {
  display: none;
}

.topbar span {
  color: var(--muted);
  margin-left: 12px;
}

.audience-context-bar .audience-badge {
  color: var(--audience-color);
  margin-left: 0;
}

.topbar-path {
  align-items: baseline;
  display: flex;
  flex-wrap: wrap;
  gap: 7px;
}

.topbar .topbar-path span {
  margin-left: 0;
}

.topbar-home {
  color: var(--accent);
  font-weight: 800;
  text-decoration: none;
}

.toplinks {
  display: flex;
  flex-wrap: wrap;
  gap: 10px 14px;
  font-size: 0.95rem;
  white-space: normal;
}

.toplinks a {
  color: var(--accent);
  font-weight: 650;
  text-decoration: none;
}

.toplinks .strong {
  color: var(--ink);
  font-weight: 800;
}

.layout {
  display: grid;
  grid-template-columns: 280px minmax(0, 1fr);
  gap: 32px;
  max-width: 1180px;
  margin: 0 auto;
  padding: 28px 24px 64px;
}

.disclaimer {
  border-bottom: 1px solid var(--line);
  background: #fbf8ef;
  color: #695331;
  font-size: 0.9rem;
  line-height: 1.35;
  padding: 8px 24px;
}

.disclaimer strong {
  color: #4f3a17;
}

.site-footer {
  align-items: center;
  border-top: 1px solid var(--line);
  background: #f8fbfc;
  color: var(--muted);
  display: flex;
  flex-wrap: wrap;
  gap: 12px 20px;
  justify-content: space-between;
  margin-top: 24px;
  padding: 18px 24px;
}

.site-footer div {
  display: grid;
  gap: 2px;
}

.material-note {
  border-top: 1px solid var(--line);
  flex-basis: 100%;
  font-size: 0.84rem;
  padding-top: 8px;
}

.material-note summary {
  cursor: pointer;
  font-weight: 700;
}

.material-note p {
  font-size: inherit;
  margin: 6px 0 0;
}

.site-footer strong {
  color: var(--ink);
}

.site-footer span {
  font-size: 0.95rem;
}

.feedback-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
}

.feedback-link {
  border: 1px solid var(--accent);
  color: var(--accent);
  font-weight: 750;
  padding: 7px 11px;
  text-decoration: none;
}

.index {
  max-width: 1040px;
  margin: 0 auto;
  padding: 36px 24px 72px;
}

.index-lead {
  color: var(--muted);
  font-size: 1.08rem;
  max-width: 720px;
}

.home-choices {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 14px;
  margin: 28px 0 18px;
}

.home-choice {
  border: 1px solid var(--line);
  border-left: 4px solid var(--accent);
  background: #ffffff;
  color: var(--ink);
  display: grid;
  gap: 8px;
  min-height: 156px;
  padding: 18px;
  text-decoration: none;
}

.home-choice span {
  color: var(--accent);
  font-size: 0.92rem;
  font-weight: 700;
  text-transform: uppercase;
}

.home-choice strong {
  color: var(--ink);
  font-size: 1.22rem;
  line-height: 1.25;
}

.home-choice small {
  color: var(--muted);
  font-size: 0.96rem;
  line-height: 1.4;
}

.index-links {
  display: flex;
  flex-wrap: wrap;
  gap: 12px 20px;
  margin: 18px 0 34px;
}

.index-links a {
  color: var(--accent);
}

.class-books {
  border-top: 1px solid var(--line);
  padding-top: 18px;
}

.book-list {
  list-style: none;
  padding: 0;
}

.book-list li {
  display: grid;
  grid-template-columns: minmax(0, 1.2fr) minmax(0, 1fr) auto;
  gap: 16px;
  align-items: center;
  border-top: 1px solid var(--line);
  padding: 16px 0;
}

.book-list a {
  color: var(--accent);
}

.book-list span {
  color: var(--muted);
}

.chapter-list {
  list-style: none;
  padding: 0;
}

.reference-group {
  margin: 30px 0 0;
}

.reference-group > h2 {
  border-bottom: 2px solid var(--line);
  color: var(--accent);
  font-size: 1.3rem;
  margin: 0;
  padding: 0 0 8px;
}

.reference-filter {
  align-items: end;
  border: 1px solid var(--line);
  background: #f8fbfc;
  display: grid;
  grid-template-columns: minmax(180px, 1fr) minmax(130px, auto) minmax(140px, auto) auto;
  gap: 8px 12px;
  margin: 24px 0 16px;
  padding: 14px;
}

.reference-field {
  display: grid;
  gap: 4px;
}

.reference-field span {
  color: var(--muted);
  font-size: 0.9rem;
  font-weight: 650;
}

.reference-filter input,
.reference-filter select {
  border: 1px solid var(--line);
  background: #ffffff;
  color: var(--ink);
  font: inherit;
  min-height: 42px;
  min-width: 0;
  padding: 8px 10px;
}

.reference-filter output {
  color: var(--muted);
  font-weight: 650;
  min-width: 74px;
  padding: 8px 0;
  text-align: right;
}

.chapter-list li {
  display: grid;
  grid-template-columns: minmax(0, 1.3fr) minmax(0, 0.9fr);
  gap: 16px;
  align-items: baseline;
  border-top: 1px solid var(--line);
  padding: 14px 0;
}

.chapter-list a,
.breadcrumbs a {
  color: var(--accent);
}

.chapter-list span {
  color: var(--muted);
  font-size: 0.95rem;
}

.split-book-note {
  border: 1px solid var(--line);
  margin: 22px 0 8px;
  padding: 14px 16px;
}

.book-subtitle {
  color: var(--muted);
  margin: -6px 0 14px;
}

.book-start-actions {
  align-items: stretch;
  border-bottom: 1px solid var(--line);
  border-top: 1px solid var(--line);
  display: flex;
  margin: 14px 0 22px;
}

.book-start-actions a,
.book-start-actions button {
  background: transparent;
  border-right: 1px solid var(--line);
  border-bottom: 0;
  border-left: 0;
  border-top: 0;
  color: var(--accent);
  cursor: pointer;
  font: inherit;
  font-weight: 750;
  padding: 9px 14px;
  text-decoration: none;
}

.book-start-actions > :last-child {
  border-right: 0;
}

.book-start-actions a.primary {
  background: var(--accent);
  color: #ffffff;
}

.exercise-print-button {
  align-items: center;
  display: inline-flex;
  gap: 7px;
}

.exercise-print-button svg {
  height: 20px;
  width: 20px;
}

.topic-exercise-print-link {
  margin: -2px 0 18px;
}

.topic-exercise-print-link a {
  align-items: center;
  border: 1px solid var(--accent);
  color: var(--accent);
  display: inline-flex;
  font-weight: 750;
  gap: 7px;
  padding: 8px 11px;
  text-decoration: none;
}

.topic-exercise-print-link svg {
  height: 20px;
  width: 20px;
}

.exercise-print-fields {
  border-bottom: 1px solid var(--line);
  border-top: 1px solid var(--line);
  display: flex;
  flex-wrap: wrap;
  gap: 12px 36px;
  margin: 18px 0;
  padding: 12px 0;
}

.exercise-print-toc {
  margin: 18px 0 28px;
}

.exercise-print-toc ol {
  columns: 2;
  margin: 0;
  padding-left: 22px;
}

.exercise-print-chapter {
  border-top: 4px solid var(--accent);
  margin-top: 34px;
  padding-top: 10px;
}

.exercise-print-chapter h2 {
  margin-top: 0;
}

.exercise-answer-lines > li {
  --answer-space: 1.6rem;
  break-inside: avoid;
  page-break-inside: avoid;
}

.exercise-answer-lines-medium > li {
  --answer-space: 3.2rem;
}

.exercise-answer-lines-long > li {
  --answer-space: 4.8rem;
}

.exercise-answer-lines > li::after {
  background: repeating-linear-gradient(
    to bottom,
    transparent 0,
    transparent calc(1.6rem - 1px),
    #c5ccd2 calc(1.6rem - 1px),
    #c5ccd2 1.6rem
  );
  content: "";
  display: block;
  height: var(--answer-space);
  margin-top: 0.35rem;
  print-color-adjust: exact;
}

.exercise-print-header {
  display: none;
}

.exercise-print-source {
  border-top: 1px solid var(--line);
  font-size: 0.9rem;
  margin-top: 24px;
  padding-top: 10px;
}

.exercise-print-footer {
  display: none;
}

.class-cheat-sheet-notice {
  background: #fff5c9;
  border-left: 5px solid #b77a00;
  margin: 18px 0 24px;
  max-width: 76ch;
  padding: 12px 14px;
}

.class-cheat-sheet-list {
  margin-top: 0;
}

.game-filter {
  align-items: end;
  border-bottom: 1px solid var(--line);
  border-top: 1px solid var(--line);
  display: grid;
  gap: 10px 14px;
  grid-template-columns: minmax(220px, 1fr) minmax(150px, auto) auto;
  margin: 18px 0 24px;
  padding: 12px 0;
}

.game-filter input,
.game-filter select {
  background: #ffffff;
  border: 1px solid var(--line);
  color: var(--ink);
  font: inherit;
  min-height: 42px;
  min-width: 0;
  padding: 8px 10px;
}

.game-filter output {
  color: var(--muted);
  font-weight: 700;
  min-width: 62px;
  padding: 8px 0;
  text-align: right;
}

.game-grid {
  display: grid;
  gap: 22px;
  grid-template-columns: repeat(3, minmax(0, 1fr));
}

.game-level-groups {
  display: grid;
  gap: 38px;
}

.game-level-group {
  min-width: 0;
}

.game-level-group[hidden] {
  display: none;
}

.game-level-heading {
  border-top: 1px solid var(--line);
  margin-bottom: 16px;
  padding-top: 16px;
}

.game-level-heading h2 {
  font-size: 1.65rem;
  margin: 0 0 4px;
}

.game-level-heading p {
  color: var(--muted);
  margin: 0;
}

.game-card {
  border: 1px solid var(--line);
  display: grid;
  grid-template-rows: auto 1fr;
  min-width: 0;
}

.game-card[hidden] {
  display: none;
}

.game-card-preview {
  aspect-ratio: 16 / 9;
  background: #eef5f7;
  border-bottom: 1px solid var(--line);
  display: block;
  overflow: hidden;
}

.game-card-preview img {
  display: block;
  height: 100%;
  object-fit: cover;
  object-position: top center;
  transition: transform 160ms ease;
  width: 100%;
}

.game-card-preview:hover img {
  transform: scale(1.015);
}

.game-card-body {
  align-content: start;
  display: grid;
  grid-template-rows: auto auto 1fr auto;
  padding: 16px;
}

.game-card-body h3 {
  font-size: 1.35rem;
  margin: 2px 0 7px;
}

.game-card-body h3 a {
  color: var(--accent);
  text-decoration-thickness: 1px;
  text-underline-offset: 3px;
}

.game-card-body > p:not(.game-card-meta) {
  color: var(--muted);
  line-height: 1.45;
  margin: 0 0 15px;
}

.game-card-meta {
  color: var(--muted);
  font-size: 0.85rem;
  font-weight: 750;
  margin: 0;
}

.game-card-actions {
  display: grid;
  gap: 8px;
  grid-template-columns: minmax(0, 0.8fr) minmax(0, 1.3fr);
}

.game-card-actions a {
  align-items: center;
  border: 1px solid var(--accent);
  color: var(--accent);
  display: flex;
  font-weight: 750;
  justify-content: center;
  min-height: 42px;
  padding: 8px 10px;
  text-align: center;
  text-decoration: none;
}

.game-card-actions a.primary {
  background: var(--accent);
  color: #ffffff;
}

.game-catalog-note {
  border-top: 1px solid var(--line);
  margin: 28px 0 0;
  padding: 14px 0 0;
}

.game-catalog-intro {
  border-left: 4px solid var(--accent);
  margin: 18px 0 24px;
  max-width: 76ch;
  padding: 4px 0 4px 14px;
}

.class-chapter-groups {
  display: grid;
  gap: 0 32px;
  grid-template-columns: repeat(2, minmax(0, 1fr));
}

.class-chapter-group {
  break-inside: avoid;
}

.class-chapter-group .chapter-list li {
  grid-template-columns: minmax(0, 1fr) auto;
}

.class-chapter-group .chapter-list span {
  border: 1px solid var(--line);
  padding: 2px 7px;
  overflow-wrap: anywhere;
}

.typical-error-groups {
  display: grid;
  gap: 0 32px;
  grid-template-columns: repeat(2, minmax(0, 1fr));
}

.typical-error-group {
  break-inside: avoid;
}

.typical-error-list li {
  align-items: start;
  grid-template-columns: minmax(150px, 0.8fr) minmax(0, 1.4fr);
}

.typical-error-list span {
  line-height: 1.45;
}

.book-intro {
  border-left: 4px solid var(--accent);
  background: #eef7f8;
  margin: 22px 0 30px;
  padding: 14px 18px;
}

.collection-guide {
  border-bottom: 1px solid var(--line);
  margin: -10px 0 18px;
}

.collection-guide > summary {
  color: var(--accent);
  cursor: pointer;
  font-weight: 750;
  padding: 8px 2px;
}

.collection-guide > .book-intro {
  margin: 4px 0 14px;
}

.book-intro h2 {
  font-size: 1.25rem;
  margin: 0 0 8px;
}

.book-intro h3 {
  font-size: 1rem;
  margin: 14px 0 6px;
}

.book-intro p {
  margin: 0;
}

.book-intro ol {
  margin: 10px 0 0;
  padding-left: 1.35rem;
}

.intro-details {
  border-top: 1px solid var(--line);
  margin: 8px 0 0;
  padding: 9px 2px 2px;
}

.intro-details summary {
  color: var(--ink);
  cursor: pointer;
  font-weight: 750;
}

.intro-details .curriculum-map {
  margin-top: 10px;
}

.student-start-check,
.parent-summary,
.teacher-summary {
  margin: 20px 0;
  padding: 12px 16px;
}

.book-intro > .student-start-check,
.book-intro > .parent-summary,
.book-intro > .teacher-summary {
  margin: 8px 0;
}

.class-guide-page .book-intro {
  background: transparent;
  border-left: 0;
  margin-top: 18px;
  padding: 0;
}

.student-start-check {
  background: #eef8fb;
  border-left: 4px solid #176b87;
}

.parent-summary {
  background: #fff7df;
  border-left: 4px solid #9a6800;
}

.teacher-summary {
  background: #eef7f1;
  border-left: 4px solid #2f6f4e;
}

.student-start-check summary,
.parent-summary summary,
.teacher-summary summary {
  color: var(--ink);
  cursor: pointer;
  font-weight: 750;
}

.student-start-check summary > span {
  color: #176b87;
  display: block;
  font-size: 0.8rem;
  font-weight: 850;
}

.student-start-check p,
.parent-summary p,
.teacher-summary p {
  margin: 8px 0;
}

.student-start-check p:first-of-type,
.parent-summary p:first-of-type,
.teacher-summary p:first-of-type {
  margin-top: 12px;
}

.student-start-check ol {
  margin: 10px 0;
}

.curriculum-map {
  display: grid;
  grid-template-columns: max-content 1fr;
  gap: 6px 12px;
  margin: 0;
}

.curriculum-map dt {
  font-weight: 700;
}

.curriculum-map dd {
  margin: 0;
}

.class-review {
  border-top: 3px solid var(--accent);
  background: #f8fbfc;
  padding: 6px 18px 18px;
}

.review-skills li {
  margin: 8px 0;
}

.review-answer {
  border-left: 4px solid var(--accent-2);
  background: #fff6ea;
  margin: 16px 0 22px;
  padding: 10px 14px;
}

.review-answer summary {
  cursor: pointer;
  font-weight: 750;
}

.review-answer p {
  margin: 8px 0 0;
}

.chapter-context {
  border-bottom: 1px solid var(--line);
  border-top: 1px solid var(--line);
  margin: 4px 0 20px;
}

.chapter-context > summary {
  align-items: baseline;
  color: var(--ink);
  cursor: pointer;
  display: flex;
  font-weight: 750;
  gap: 12px;
  justify-content: space-between;
  padding: 9px 2px;
}

.chapter-context > summary small {
  color: var(--muted);
  font-size: 0.88rem;
  font-weight: 600;
}

.chapter-context-body {
  padding-bottom: 4px;
}

.chapter-context .module-meta,
.chapter-context .learning-path {
  margin: 0 0 10px;
}

.learning-path {
  border-left: 4px solid var(--accent-2);
  background: #fff6ea;
  color: #5c3518;
  font-size: 0.98rem;
  line-height: 1.45;
  margin: 14px 0 20px;
  padding: 10px 14px;
}

.learning-path ul {
  margin: 0;
  padding-left: 20px;
}

.learning-path-title {
  color: var(--text);
  font-weight: 750;
  margin: 0 0 6px;
}

.learning-path li {
  margin: 4px 0;
}

.learning-path li + li {
  border-top: 1px solid #e4d2bd;
  margin-top: 7px;
  padding-top: 7px;
}

.learning-path a,
.module-meta a {
  color: var(--accent-2);
  font-weight: 600;
}

.chapter-pager {
  border-top: 1px solid var(--line);
  display: flex;
  gap: 14px;
  justify-content: space-between;
  margin: 44px 0 8px;
  padding-top: 18px;
}

.chapter-pager a {
  border: 1px solid var(--line);
  color: var(--accent);
  flex: 1 1 0;
  padding: 12px 14px;
  text-decoration: none;
}

.chapter-pager a.next {
  text-align: right;
}

.chapter-pager span {
  color: var(--muted);
  display: block;
  font-size: 0.88rem;
  margin-bottom: 4px;
}

.chapter-pager strong {
  color: var(--ink);
  display: block;
  font-size: 1rem;
}

.breadcrumbs {
  border-bottom: 1px solid var(--line);
  background: #fffefa;
  color: var(--muted);
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
  margin: 0;
  padding: 7px 24px;
  font-size: 0.95rem;
  line-height: 1.35;
}

.breadcrumbs a {
  font-weight: 600;
  text-decoration: none;
}

.breadcrumbs span {
  color: var(--muted);
}

.breadcrumbs .strong,
.breadcrumbs .current {
  color: var(--ink);
  font-weight: 850;
}

.breadcrumbs .current {
  background: #f1f6f8;
  border: 1px solid #d8e5ea;
  padding: 1px 7px;
}

.skip-link {
  background: var(--ink);
  color: #ffffff;
  font-weight: 750;
  left: 12px;
  padding: 10px 14px;
  position: fixed;
  text-decoration: none;
  top: 12px;
  transform: translateY(-180%);
  z-index: 1000;
}

.skip-link:focus {
  transform: translateY(0);
}

.visually-hidden {
  border: 0;
  clip: rect(0 0 0 0);
  clip-path: inset(50%);
  height: 1px;
  margin: -1px;
  overflow: hidden;
  padding: 0;
  position: absolute;
  width: 1px;
}

:where(a, button, input, select, textarea, summary):focus-visible {
  outline: 3px solid #0b66c3;
  outline-offset: 3px;
}

@media (prefers-reduced-motion: reduce) {
  *,
  *::before,
  *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    scroll-behavior: auto !important;
    transition-duration: 0.01ms !important;
  }
}

body:has(.breadcrumbs) .topbar {
  display: none;
}

.history {
  padding-left: 1.4rem;
}

.history li {
  border-top: 1px solid var(--line);
  padding: 12px 0;
}

.history span {
  color: var(--muted);
}

.toc {
  position: sticky;
  top: 70px;
  align-self: start;
  border-right: 1px solid var(--line);
  max-height: calc(100vh - 86px);
  overflow-y: auto;
  overscroll-behavior: contain;
  padding-right: 18px;
  scrollbar-gutter: stable;
}

.toc a {
  color: var(--accent);
  text-decoration: none;
}

.toc-group {
  list-style: none;
  margin: 0 0 14px;
}

.toc-group-title {
  display: block;
  margin: 8px 0 4px;
  color: var(--muted);
  font-size: 0.82rem;
  font-weight: 800;
  letter-spacing: 0.02em;
  text-transform: uppercase;
}

.toc-group ol {
  margin: 0;
  padding-left: 20px;
}

.no-toc .layout {
  display: block;
  max-width: 980px;
}

.no-toc .toc {
  display: none;
}

.no-toc main {
  max-width: none;
}

.class-split-index main > h1,
.class-guide-page main > h1,
.chapter-page main > h1 {
  margin-top: 0;
}

.quick-reference-page main {
  max-width: 980px;
}

.quick-reference-page main > h1 {
  margin-bottom: 1rem;
}

.quick-reference-page main > h2 {
  margin-top: 1.35rem;
}

.quick-reference-page main > h2:first-of-type {
  margin-top: 0;
}

.quick-reference-page .chapter-pager {
  margin-top: 1.75rem;
}

.quick-reference-actions {
  margin-top: 1.75rem;
}

.review-reference-page main {
  max-width: 62rem;
}

.review-reference-page main > h2 {
  margin-top: 1.7rem;
}

.review-reference-actions {
  margin-top: 1.5rem;
}

.review-reference-page .figure img {
  max-height: 24rem;
}

.quick-reference-book .quick-reference-print-card {
  border-top: 2px solid var(--accent);
  padding-top: 0.35rem;
}

.quick-reference-book .quick-reference-print-card:first-of-type {
  border-top: 0;
}

main {
  max-width: 820px;
  min-width: 0;
}

h1, h2, h3 {
  line-height: 1.2;
  margin: 1.4em 0 0.45em;
}

h1 {
  font-size: 2.4rem;
  color: var(--accent);
}

h2 {
  font-size: 1.65rem;
}

h3 {
  font-size: 1.22rem;
}

p, li {
  font-size: 1.04rem;
}

code {
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: 5px;
  padding: 0.08em 0.28em;
}

table {
  width: 100%;
  max-width: 100%;
  border-collapse: collapse;
  margin: 18px 0;
}

th, td {
  border: 1px solid var(--line);
  padding: 8px 10px;
  text-align: left;
}

th {
  background: var(--surface);
}

tbody th {
  background: #ffffff;
  font-weight: 700;
}

.figure {
  margin: 26px 0;
  border: 1px solid var(--line);
  background: #ffffff;
  padding: 14px;
  max-width: 100%;
}

.figure img {
  display: block;
  width: 100%;
  max-width: 100%;
  max-height: 420px;
  object-fit: contain;
}

.figure figcaption {
  border-top: 1px solid var(--line);
  color: var(--muted);
  font-size: 0.95rem;
  margin-top: 12px;
  padding-top: 10px;
}

.math {
  font-size: 1.2em;
  overflow-x: auto;
  padding: 10px 0;
}

.module-meta {
  border-left: 4px solid var(--accent);
  background: #eef7f8;
  color: #274850;
  font-size: 0.95rem;
  line-height: 1.45;
  margin: 18px 0;
  padding: 10px 14px;
}

.callout {
  border: 1px solid var(--line);
  background: #ffffff;
  margin: 18px 0;
  max-width: 100%;
  overflow-wrap: anywhere;
}

.callout summary {
  color: var(--accent-2);
  cursor: pointer;
  font-weight: 700;
  padding: 10px 14px;
  line-height: 1.35;
}

.callout-body {
  border-top: 1px solid var(--line);
  color: var(--muted);
  padding: 0 14px 12px;
}

.callout-body p:last-child {
  margin-bottom: 0;
}

.callout-teacher {
  background: #eef7f1;
  border-color: #b9d5c3;
}

.callout-teacher summary {
  color: #2f6f4e;
}

.callout-student-hint {
  background: #eef8fb;
  border-color: #b9dce6;
}

.callout-student-hint summary {
  color: #0f6f86;
}

.callout-parent {
  background: #fff7df;
  border-color: #e3c77c;
}

.callout-parent summary {
  color: #7a5200;
}

.print-hide-teacher .callout-teacher,
.print-hide-parent .callout-parent,
.print-hide-role-notes .callout-teacher,
.print-hide-role-notes .callout-parent {
  display: none !important;
}

.practice-goal {
  background: #f6f8fb;
  border-left: 4px solid #6a8fb8;
  color: var(--muted);
  font-size: 0.96rem;
  margin: 24px 0 12px;
  padding: 10px 14px;
}

.practice-goal strong {
  color: var(--ink);
}

.typical-error-block {
  background: #fff8ed;
  border: 1px solid #e5c79f;
  border-left: 5px solid #a94f12;
  border-radius: 6px;
  margin: 28px 0 22px;
  padding: 0 18px 14px;
}

.typical-error-block > h2 {
  align-items: center;
  color: #843b0b;
  display: flex;
  gap: 10px;
  margin-top: 0;
  padding-top: 14px;
}

.typical-error-block > h2::before {
  align-items: center;
  background: #a94f12;
  border-radius: 4px;
  color: #ffffff;
  content: "!";
  display: inline-flex;
  flex: 0 0 1.65rem;
  font-size: 1.05rem;
  height: 1.65rem;
  justify-content: center;
  line-height: 1;
}

.typical-error-block > :last-child {
  margin-bottom: 0;
}

hr {
  border: 0;
  border-top: 1px solid var(--line);
  margin: 48px 0;
}

.pptx-page h1 { font-size: 2rem; }
.pptx-page h2 { font-size: 1.4rem; }
.pptx-lesson, .pptx-slide { border-top: 1px solid var(--border, #dce3e7); padding-top: 1rem; margin-top: 2rem; }
.pptx-thumbnail { width: 100%; max-width: 480px; height: auto; }
.pptx-slide figure { margin: 1rem 0; }
.pptx-slide figure img { display: block; width: 100%; height: auto; }
.pptx-slide details { margin-top: .7rem; }
.pptx-slide { scroll-margin-top: 1rem; }
.presentation-forms { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 32px; }
.presentation-forms article { min-width: 0; }
.presentation-forms h3 { font-size: 1.2rem; }
@media (max-width: 720px) { .presentation-forms { grid-template-columns: minmax(0, 1fr); gap: 12px; } }

body.slides {
  background: #f7f6f1;
  overflow: hidden;
}

body.slides .topbar,
body.slides .toc,
body.slides .site-footer {
  display: none;
}

body.slides .layout {
  display: block;
  max-width: none;
  padding: 0;
}

body.slides main {
  max-width: none;
}

.slide {
  display: none;
  width: 100vw;
  height: 100vh;
  padding: 7vh 9vw;
  overflow: auto;
  background: var(--paper);
}

.slide.active {
  display: block;
}

body.slides:not(.slides-ready) .slide:first-of-type {
  display: block;
}

.slide::after {
  content: var(--slide-index);
  position: fixed;
  right: 28px;
  bottom: 22px;
  color: var(--muted);
  font-size: 0.95rem;
}

.slide h1 {
  font-size: 4rem;
  max-width: 980px;
}

.slide h2 {
  font-size: 3rem;
  color: var(--accent);
}

.slide p,
.slide li {
  font-size: 1.45rem;
  max-width: 980px;
}

.slide table {
  max-width: 840px;
}

.slide .figure {
  max-width: 900px;
}

.slide-intro .figure {
  max-width: 560px;
  margin: 16px 0;
}

.slide-intro .figure img {
  max-height: 32vh;
  object-fit: contain;
}

.slide .module-meta {
  max-width: 980px;
  font-size: 1.05rem;
}

.slide-hint {
  color: var(--muted);
}

.slide-controls {
  position: fixed;
  right: 24px;
  bottom: 20px;
  z-index: 5;
  display: flex;
  align-items: center;
  gap: 10px;
  border: 1px solid var(--line);
  background: rgba(255, 253, 248, 0.94);
  padding: 8px 10px;
}

.slide-controls button {
  width: 38px;
  height: 34px;
  border: 1px solid var(--line);
  background: #ffffff;
  color: var(--accent);
  font-size: 1.5rem;
  line-height: 1;
  cursor: pointer;
}

.slide-controls button:disabled {
  color: var(--muted);
  cursor: default;
  opacity: 0.45;
}

.slide-controls span {
  min-width: 68px;
  color: var(--muted);
  text-align: center;
}

@media (max-width: 800px) {
  .layout {
    grid-template-columns: 1fr;
    padding: 22px 16px 56px;
  }

  .breadcrumbs {
    padding: 10px 16px;
    font-size: 0.98rem;
  }

  .chapter-pager {
    flex-direction: column;
  }

  .chapter-pager a.next {
    text-align: left;
  }

  .book-start-actions {
    display: grid;
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }

  .book-start-actions a {
    align-items: center;
    display: flex;
    justify-content: center;
    padding: 9px 8px;
    text-align: center;
  }

  .review-reference-actions a:last-child {
    grid-column: 1 / -1;
  }

  .chapter-context > summary {
    align-items: flex-start;
    flex-direction: column;
    gap: 2px;
  }

  main,
  p,
  li,
  code {
    overflow-wrap: anywhere;
  }

  mjx-container[display="true"] {
    max-width: 100%;
    overflow-x: auto;
    overflow-y: hidden;
  }

  table {
    display: block;
    overflow-x: auto;
    max-width: 100%;
  }

  .figure {
    padding: 8px;
  }

  .book-intro {
    margin: 14px 0 22px;
    padding: 12px;
  }

  .book-intro > details {
    padding-left: 10px;
    padding-right: 10px;
  }

  .book-intro > .intro-details {
    padding-left: 2px;
    padding-right: 2px;
  }

  .class-review {
    padding: 4px 12px 16px;
  }

  .class-review h1 {
    font-size: 1.75rem;
  }

  .review-skills {
    padding-left: 1.2rem;
  }

  .toc {
    position: static;
    border-right: 0;
    border-bottom: 1px solid var(--line);
    padding-bottom: 16px;
  }

  .topbar {
    align-items: flex-start;
    flex-direction: column;
    gap: 8px;
  }

  .topbar span {
    display: block;
    margin-left: 0;
  }

  .topbar .topbar-path span {
    display: inline;
  }

  .toplinks {
    white-space: normal;
  }

  .site-footer {
    align-items: stretch;
    flex-direction: column;
    padding: 16px;
  }

  .feedback-link {
    text-align: center;
  }

  .chapter-list li,
  .book-list li {
    grid-template-columns: 1fr;
    gap: 4px;
  }

  .class-chapter-groups {
    grid-template-columns: 1fr;
  }

  .typical-error-groups {
    grid-template-columns: 1fr;
  }

  .class-chapter-group .chapter-list span {
    justify-self: start;
  }

  .reference-filter {
    grid-template-columns: 1fr;
  }

  .game-filter {
    grid-template-columns: minmax(0, 1fr) minmax(130px, auto) auto;
  }

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

  .curriculum-map {
    grid-template-columns: 1fr;
  }

  .reference-filter output {
    text-align: left;
  }

  .home-choices {
    grid-template-columns: 1fr;
  }

  .slide {
    padding: 6vh 7vw;
  }

  .slide h1 {
    font-size: 2.6rem;
  }

  .slide h2 {
    font-size: 2rem;
  }

  .slide p,
  .slide li {
    font-size: 1.15rem;
  }
}

@media (max-width: 560px) {
  .reference-filter {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .reference-filter .reference-field:first-child,
  .reference-filter output {
    grid-column: 1 / -1;
  }

  .exercise-print-toc ol {
    columns: 1;
  }

  .game-filter,
  .game-grid {
    grid-template-columns: 1fr;
  }

  .game-filter output {
    text-align: left;
  }
}

@media print {
  @page {
    margin: 18mm 14mm 16mm;
  }

  body {
    background: #ffffff;
    color: #000000;
  }

  .topbar,
  .audience-context-bar,
  .toc,
  .breadcrumbs,
  .skip-link,
  .site-footer,
  .slide-controls,
  .reference-filter,
  .game-filter,
  .topic-exercise-print-link,
  .answer-free-print .book-start-actions,
  .answer-free-print .exercise-print-toc,
  .answer-free-print .exercise-print-source {
    display: none !important;
  }

  .answer-free-print .exercise-print-footer {
    border-top: 1px solid #999999;
    display: flex !important;
    flex-wrap: wrap;
    font-size: 8.5pt;
    gap: 2mm 6mm;
    margin-top: 10mm;
    padding-top: 3mm;
  }

  .answer-free-print .exercise-print-header {
    align-items: baseline;
    border-bottom: 0.3mm solid #888888;
    color: #333333;
    display: flex !important;
    font-size: 8.5pt;
    justify-content: space-between;
    margin-bottom: 8mm;
    padding-bottom: 1.5mm;
  }

  .disclaimer {
    border: 1px solid #bbb;
    background: #ffffff;
    color: #333333;
    font-size: 0.85rem;
    margin: 0 0 10mm;
    padding: 4mm;
  }

  .layout,
  .no-toc .layout,
  main,
  .no-toc main {
    display: block;
    max-width: none;
    padding: 0;
  }

  a {
    color: #000000;
    text-decoration: underline;
  }

  h1,
  h2,
  h3 {
    break-after: avoid;
    page-break-after: avoid;
  }

  p,
  li,
  table,
  pre,
  .math,
  .figure,
  .callout,
  .typical-error-block,
  .module-meta,
  .learning-path {
    break-inside: avoid;
    page-break-inside: avoid;
  }

  .book-intro,
  .class-review {
    break-inside: auto;
    page-break-inside: auto;
  }

  .book-intro > details,
  .review-skills li,
  .review-answer {
    break-inside: avoid;
    page-break-inside: avoid;
  }

  .book-intro details > :not(summary),
  .class-review details > :not(summary),
  .collection-guide > :not(summary),
  .chapter-context > :not(summary) {
    display: block !important;
  }

  .class-review {
    break-before: page;
    page-break-before: always;
  }

  .callout-teacher,
  .callout-parent {
    border-style: dashed;
    border-width: 1px 1px 1px 4px;
  }

  .callout-teacher summary::before {
    content: "Print: õpetajale · ";
    color: #555555;
    font-weight: 600;
  }

  .callout-parent summary::before {
    content: "Print: lapsevanemale · ";
    color: #555555;
    font-weight: 600;
  }

  .print-hide-teacher .callout-teacher,
  .print-hide-parent .callout-parent,
  .print-hide-role-notes .callout-teacher,
  .print-hide-role-notes .callout-parent {
    display: none !important;
  }

  table,
  .math {
    overflow: visible;
  }

  .figure {
    border-color: #bbb;
    background: #ffffff;
    max-width: 100%;
  }

  .figure img {
    max-height: 170mm;
  }

  .chapter-list li,
  .book-list li {
    break-inside: avoid;
    page-break-inside: avoid;
  }

  .quick-reference-print-card {
    break-inside: avoid;
    page-break-inside: avoid;
  }

  .exercise-print-chapter + .exercise-print-chapter {
    break-before: page;
    page-break-before: always;
  }

  .review-reference-page .figure img {
    max-height: 80mm;
  }
}