/* Laboratorio de Potenciación y Radicación
   Roles: azul = acción aditiva; amarillo = estructura multiplicativa;
   verde = neutro/resultado válido; rosa = error o resto bajo el radical. */

.pr-layout {
  display: grid;
  grid-template-columns: minmax(205px, 245px) minmax(0, 1fr);
  gap: 28px;
  max-width: 1440px;
  margin: 24px auto;
  padding: 0 20px 64px;
  align-items: start;
}

.pr-sidebar {
  position: sticky;
  top: 5rem;
  max-height: calc(100vh - 6rem);
  overflow: auto;
  border-right: 1px dashed var(--line, var(--border));
  padding-right: 16px;
}

.pr-sidebar h2,
.pr-sidebar h3,
.pr-section h2,
.pr-section h3,
.pr-review h2,
.pr-challenge-section h2,
.pr-challenge-section h3 {
  font-family: var(--font-hand);
  color: var(--yellow);
}

.pr-sidebar h2 {
  font-size: 1.5rem;
}

.pr-sidebar__group {
  margin: 20px 0;
}

.pr-sidebar__group h3 {
  margin: 0 0 6px;
  color: var(--muted);
  font: 600 0.82rem var(--font-body);
}

.pr-sidebar a {
  display: block;
  padding: 6px 0;
  color: var(--ink);
  line-height: 1.35;
  text-decoration: none;
}

.pr-sidebar a:hover,
.pr-sidebar a:focus-visible {
  color: var(--blue);
  text-decoration: underline;
}

.pr-sidebar__check {
  margin-left: 6px;
  color: var(--green);
  vertical-align: middle;
}

.pr-main {
  min-width: 0;
}

.pr-hero {
  margin-bottom: 28px;
  padding: 18px 0 30px;
  border-bottom: 1px solid var(--line, var(--border));
}

.pr-hero h1 {
  margin: 0.2em 0;
  color: var(--ink);
  font-family: var(--font-hand);
  font-size: clamp(2.2rem, 5vw, 3.6rem);
}

.pr-hero > p:not(.pr-kicker) {
  max-width: 760px;
  font-size: 1.12rem;
  line-height: 1.6;
}

.pr-kicker {
  margin: 0;
  color: var(--muted);
  font-size: 0.78rem;
  font-weight: 700;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

.pr-progress {
  color: var(--green);
  font-weight: 700;
}

.pr-chapter {
  margin: 36px 0 56px;
}

.pr-chapter > h2 {
  color: var(--yellow);
  font-family: var(--font-hand);
  font-size: 1.65rem;
}

.pr-section {
  padding: 26px 0 40px;
  border-top: 1px solid var(--line, var(--border));
  scroll-margin-top: 76px;
}

.pr-section__header {
  margin-bottom: 18px;
}

.pr-section__header h2 {
  margin: 0.3em 0;
  font-size: clamp(1.6rem, 3vw, 2.2rem);
}

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

.pr-tutor-actions .btn {
  display: inline-flex;
  align-items: center;
  gap: 7px;
}

.pr-workbench {
  display: block;
  overflow: visible;
}

.pr-theory-column {
  min-width: 0;
}

.pr-note {
  padding: 12px 0 16px;
  border-bottom: 1px solid var(--line, var(--border));
}

.pr-note h3,
.pr-probe h3 {
  margin: 0 0 8px;
  color: var(--ink);
  font: 700 1.25rem var(--font-hand);
}

.pr-note p {
  margin: 0 0 0.8em;
  line-height: 1.65;
}

.pr-note p:last-child {
  margin-bottom: 0;
}

.pr-note--warning h3 {
  color: var(--pink);
}

.pr-note--check h3 {
  color: var(--green);
}

.pr-note--formula {
  overflow-x: auto;
}

.pr-table {
  border-collapse: collapse;
  font-size: 0.92rem;
}

.pr-table th,
.pr-table td {
  padding: 9px 10px;
  border-bottom: 1px solid var(--line, var(--border));
  text-align: left;
  vertical-align: top;
}

.pr-table thead th {
  color: var(--yellow);
}

.pr-probe {
  position: static;
  min-width: 0;
  max-height: none;
  overflow: visible;
  padding: 16px;
  border: 1px solid var(--line, var(--border));
  background: var(--surface, var(--bg));
  box-shadow: 0 8px 24px rgb(0 0 0 / 12%);
}

.pr-widget {
  display: grid;
  gap: 12px;
}

.pr-widget__controls {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 12px 16px;
}

.pr-control {
  display: grid;
  gap: 6px;
  color: var(--muted);
  font-size: 0.9rem;
}

.pr-control input[type="range"] {
  width: 100%;
  accent-color: var(--blue);
}

.pr-control output {
  color: var(--blue);
  font-weight: 700;
}

.pr-control select,
.pr-control input[type="number"],
.pr-control input[type="text"] {
  width: 100%;
  min-width: 0;
  padding: 7px 8px;
  border: 1px solid var(--line, var(--border));
  background: var(--bg);
  color: var(--ink);
  font: inherit;
}

.pr-widget > svg.pr-board-svg {
  display: block;
  width: 100%;
  height: auto;
  overflow: visible;
}

.pr-widget button > svg.chalk-icon {
  display: inline-block;
  flex: 0 0 18px;
  width: 18px;
  height: 18px;
}

.pr-widget__result {
  min-height: 3em;
  margin: 0;
  padding-top: 10px;
  border-top: 1px dashed var(--line, var(--border));
  color: var(--ink);
  line-height: 1.5;
}

.pr-widget__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
}

.pr-widget__actions .btn {
  display: inline-flex;
  align-items: center;
  gap: 6px;
}

.pr-svg-label {
  fill: var(--ink);
  font: 600 16px var(--font-body);
  paint-order: stroke;
  stroke: var(--bg);
  stroke-width: 3px;
  stroke-linejoin: round;
}

.pr-svg-small {
  fill: var(--muted);
  font: 13.5px var(--font-body);
}

.pr-page .pr-readout__item p {
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  min-height: 2.6em;
  gap: 4px;
}

.pr-svg-additive {
  stroke: var(--blue);
  fill: var(--blue);
}

.pr-svg-multiplicative {
  stroke: var(--yellow);
  fill: var(--yellow);
}

.pr-svg-valid {
  stroke: var(--green);
  fill: var(--green);
}

.pr-svg-error {
  stroke: var(--pink);
  fill: var(--pink);
}

.pr-svg-neutral {
  stroke: var(--muted);
  fill: none;
}

.pr-check {
  padding-left: 24px;
}

.pr-check__item {
  margin: 0 0 18px;
  padding: 10px 0;
}

.pr-check__prompt {
  margin-bottom: 8px;
  color: var(--ink);
  line-height: 1.55;
}

.pr-check__item label {
  display: grid;
  gap: 8px;
}

.pr-check__item input {
  width: min(280px, 100%);
  padding: 8px;
  border: 1px solid var(--line, var(--border));
  background: var(--bg);
  color: var(--ink);
  font: inherit;
}

.pr-check__preview {
  min-height: 1.4em;
  color: var(--muted);
  font-size: 0.9rem;
}

.pr-check__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin: 8px 0;
}

.pr-check__actions .btn {
  display: inline-flex;
  align-items: center;
  gap: 6px;
}

.pr-check__feedback {
  min-height: 1.4em;
  margin: 0;
  color: var(--muted);
  font-size: 0.9rem;
}

.pr-check__feedback.is-correct {
  color: var(--green);
}

.pr-check__feedback.is-error {
  color: var(--pink);
}

.pr-check__hint,
.pr-check__solution {
  margin: 8px 0;
  padding: 10px 12px;
  line-height: 1.55;
}

.pr-check__solution {
  border-left-color: var(--green);
}

.pr-review {
  padding: 28px 0;
  border-top: 2px solid var(--yellow);
}

.pr-review h2 {
  font-size: 2rem;
}

.pr-muted {
  color: var(--muted);
}

.pr-glossary {
  margin: 14px 0;
  color: var(--muted);
}

.pr-gloss-term {
  border-bottom: 1.5px dashed var(--yellow);
  color: var(--yellow);
  font: inherit;
  cursor: help;
}

.pr-gloss-term:hover,
.pr-gloss-term:focus-visible {
  color: var(--yellow);
}

.pr-challenge-section {
  padding: 28px 0;
  border-top: 2px solid var(--yellow);
}

.pr-challenge-section h2 {
  font-size: 2rem;
}

.pr-challenge-section h3 {
  margin-top: 28px;
  font-size: 1.35rem;
}

.pr-challenge {
  display: grid;
  gap: 10px;
  max-width: 700px;
  padding: 16px 0;
}

.pr-challenge input {
  padding: 8px;
  border: 1px solid var(--line, var(--border));
  background: var(--bg);
  color: var(--ink);
  font: inherit;
}

.pr-challenge__prompt {
  color: var(--ink);
  font-size: 1.1rem;
}

.pr-trap {
  margin: 14px 0;
  padding: 14px 0;
  border-bottom: 1px solid var(--line, var(--border));
}

.pr-trap__columns {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 16px;
  margin: 12px 0;
}

.pr-trap__wrong,
.pr-trap__proof {
  padding: 12px;
}

.pr-trap p {
  margin: 8px 0 0;
  line-height: 1.55;
}

.pr-formula-token {
  padding: 0 3px;
  border-radius: 2px;
  color: var(--ink);
  cursor: help;
}

.pr-formula-token:hover,
.pr-formula-token:focus-visible,
.pr-formula-token.is-active {
  background: color-mix(in srgb, var(--yellow) 22%, transparent);
  color: var(--yellow);
  outline: 1px solid var(--yellow);
}

.pr-annotation {
  display: grid;
  grid-template-columns: auto 1fr;
  gap: 8px;
  margin-top: 10px;
  color: var(--muted);
}

.pr-annotation__arrow {
  color: var(--yellow);
  font-size: 1.3rem;
}

.pr-worlds-comparison {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 12px;
  margin: 12px 0 18px;
}

.pr-world-card {
  min-width: 0;
  padding: 14px;
  border: 1px solid var(--line, var(--border));
  border-top-width: 3px;
  background: color-mix(in srgb, var(--surface, var(--bg)) 92%, transparent);
}

.pr-world-card--additive {
  border-top-color: var(--blue);
}

.pr-world-card--multiplicative {
  border-top-color: var(--yellow);
}

.pr-world-card h3 {
  margin: 0 0 8px;
  color: var(--blue);
}

.pr-world-card--multiplicative h3,
.pr-world-card__equation {
  color: var(--yellow);
}

.pr-world-card p {
  line-height: 1.5;
}

.pr-world-card__equation {
  font-weight: 700;
}

.pr-worlds-comparison__note {
  grid-column: 1 / -1;
  margin: 0;
  padding: 10px;
  color: var(--ink);
}

.pr-trainer {
  display: grid;
  gap: 12px;
  margin-bottom: 24px;
  padding: 16px;
  border: 1px solid var(--line, var(--border));
}

.pr-trainer > h3,
.pr-traps > h3 {
  margin: 0;
  color: var(--yellow);
  font-family: var(--font-hand);
}

.pr-trainer input {
  width: min(440px, 100%);
  min-width: 0;
  padding: 8px;
  border: 1px solid var(--line, var(--border));
  background: var(--bg);
  color: var(--ink);
  font: inherit;
}

.pr-trainer .pr-muted {
  margin: 0;
}

.pr-traps {
  display: grid;
  gap: 14px;
  margin: 24px 0 32px;
}

.pr-trap {
  padding: 14px;
  border: 1px solid var(--line, var(--border));
}

.pr-trap__example {
  padding: 10px;
}

.glossary-card {
  position: fixed;
  z-index: 1200;
  right: clamp(12px, 3vw, 40px);
  bottom: clamp(12px, 3vw, 40px);
  display: grid;
  grid-template-columns: minmax(84px, 140px) minmax(0, 1fr);
  gap: 16px;
  width: min(620px, calc(100vw - 24px));
  max-height: min(70vh, 620px);
  overflow: auto;
  padding: 20px;
  border: 1px solid var(--yellow);
  background: color-mix(in srgb, var(--bg) 96%, var(--yellow));
  box-shadow: 0 14px 50px #0008;
}

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

.glossary-card__sprite {
  grid-row: span 2;
  align-self: end;
  width: 100%;
  max-height: 245px;
  object-fit: contain;
}

.glossary-card__content {
  min-width: 0;
}

.glossary-card__title {
  margin: 0 32px 8px 0;
  color: var(--yellow);
  font-family: var(--font-hand);
  font-size: 1.45rem;
}

.glossary-card__definition,
.glossary-card__example,
.glossary-card__contrast {
  margin: 8px 0;
  line-height: 1.5;
}

.glossary-card__formula {
  margin: 12px 0;
  padding: 10px;
  overflow-x: auto;
  color: var(--yellow);
}

.glossary-card__contrast {
  padding-left: 10px;
}

.glossary-card__close {
  position: absolute;
  top: 8px;
  right: 8px;
  display: grid;
  width: 36px;
  height: 36px;
  place-items: center;
  border: 1px solid var(--line, var(--border));
  border-radius: 50%;
  color: var(--ink);
  background: var(--bg);
  cursor: pointer;
}

@media (max-width: 900px) {
  .pr-layout {
    grid-template-columns: minmax(0, 1fr);
    padding: 0 14px 44px;
  }

  .pr-sidebar {
    position: static;
    max-height: none;
    padding: 0 0 12px;
    border: 0;
    border-bottom: 1px dashed var(--line, var(--border));
  }

  .pr-sidebar__group {
    display: inline-block;
    margin: 8px 12px 8px 0;
    vertical-align: top;
  }

  .pr-table {
    min-width: 0;
    table-layout: fixed;
  }

  .pr-table th,
  .pr-table td {
    overflow-wrap: anywhere;
    padding: 7px 5px;
    font-size: 0.82rem;
  }

  .pr-hero h1 {
    font-size: 2.25rem;
  }
}

/* Máquina de dominio: las frases viven en HTML para poder partirse sin chocar. */
.pr-pipe-machine {
  display: grid;
  gap: 12px;
  margin: 2px 0 4px;
}

.pr-pipe-row {
  padding: 12px;
  border: 1px solid var(--line, var(--border));
  background: color-mix(in srgb, var(--green) 7%, transparent);
}

.pr-pipe-row--blocked {
  background: color-mix(in srgb, var(--pink) 7%, transparent);
}

.pr-pipe-row h4 {
  margin: 0 0 10px;
  color: var(--ink);
  font-family: var(--font-hand);
  font-size: 1.08rem;
}

.pr-pipe-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 10px;
}

.pr-pipe-step {
  position: relative;
  min-width: 0;
  padding: 10px;
  border: 1px solid var(--line, var(--border));
  border-radius: 8px;
  background: var(--bg);
}

.pr-pipe-step:not(:last-child)::after {
  position: absolute;
  top: 50%;
  right: -9px;
  z-index: 1;
  color: var(--yellow);
  content: "→";
  transform: translateY(-50%);
}

.pr-pipe-step__number {
  display: block;
  margin-bottom: 6px;
  color: var(--muted);
  font-size: 0.73rem;
  font-weight: 700;
  letter-spacing: 0.04em;
  text-transform: uppercase;
}

.pr-pipe-step__value {
  margin: 0;
  overflow-wrap: anywhere;
  color: var(--ink);
  font-size: 0.92rem;
  line-height: 1.4;
}

.pr-pipe-row.is-blocked .pr-pipe-step:nth-child(n + 2) {
  border-color: var(--pink);
  color: var(--pink);
}

#sec-5 [data-widget="geometria-raices"] .pr-chip-group {
  grid-column: 1 / -1;
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
}

#sec-5 [data-widget="geometria-raices"] .pr-chip-group .chip {
  flex: 1 1 170px;
}

#sec-5 [data-widget="geometria-raices"] .pr-board-svg {
  min-height: 0;
}

#sec-5 [data-widget="geometria-raices"] .pr-svg-label {
  paint-order: stroke;
  stroke: var(--bg);
  stroke-width: 3px;
  stroke-linejoin: round;
  font-size: 16px;
}

@media (max-width: 600px) {
  .pr-pipe-grid {
    grid-template-columns: minmax(0, 1fr);
  }

  .pr-pipe-step:not(:last-child)::after {
    top: auto;
    right: auto;
    bottom: -15px;
    left: 50%;
    transform: translateX(-50%) rotate(90deg);
  }
}

/* Inspector de paradojas: cada igualdad tiene espacio propio y una radiografía. */
.pr-paradox-panel {
  display: grid;
  gap: 12px;
  min-height: 270px;
}

.pr-paradox-chain,
.pr-precedence-machine,
.pr-paradox-scan {
  padding: 14px;
  border: 1px solid var(--line, var(--border));
  background: color-mix(in srgb, var(--surface, var(--bg)) 92%, transparent);
}

.pr-paradox-chain h4,
.pr-precedence-machine h4,
.pr-paradox-scan strong {
  display: block;
  margin: 0 0 10px;
  color: var(--yellow);
  font-family: var(--font-hand);
  font-size: 1.12rem;
}

.pr-paradox-chain__steps {
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: 8px;
}

.pr-paradox-card {
  display: grid;
  min-width: min(100%, 150px);
  flex: 1 1 150px;
  gap: 4px;
  padding: 10px;
  border: 1px solid var(--line, var(--border));
  border-radius: 8px;
  background: var(--bg);
}

.pr-paradox-card__step {
  color: var(--muted);
  font-size: 0.72rem;
  font-weight: 700;
  text-transform: uppercase;
}

.pr-paradox-card__formula {
  overflow-wrap: anywhere;
  color: var(--ink);
  font-size: 1.06rem;
}

.pr-paradox-equals {
  min-width: 34px;
  min-height: 34px;
  border: 1px dashed var(--yellow);
  border-radius: 50%;
  background: transparent;
  color: var(--yellow);
  font: 700 1.15rem var(--font-math);
  cursor: pointer;
}

.pr-paradox-equals:hover,
.pr-paradox-equals:focus-visible,
.pr-paradox-equals.is-selected {
  border-color: var(--pink);
  background: color-mix(in srgb, var(--pink) 18%, transparent);
  color: var(--pink);
  outline: none;
}

.pr-paradox-scan p,
.pr-precedence-machine p {
  margin: 7px 0 0;
  line-height: 1.55;
}

@media (max-width: 600px) {
  .pr-paradox-chain__steps {
    align-items: stretch;
  }

  .pr-paradox-equals {
    flex: 0 0 34px;
  }
}

@media (max-width: 600px) {
  .pr-widget__controls {
    grid-template-columns: minmax(0, 1fr);
  }

  .pr-trap__columns {
    grid-template-columns: minmax(0, 1fr);
  }

  .pr-worlds-comparison {
    grid-template-columns: minmax(0, 1fr);
  }

  .pr-tutor-actions .btn {
    font-size: 0.88rem;
  }
}

@media print {
  header[data-site-nav],
  .pr-sidebar,
  .pr-tutor-actions,
  .pr-probe,
  .pr-progress,
  .pr-review button,
  .pr-challenge-section {
    display: none !important;
  }

  .pr-layout {
    display: block;
    max-width: none;
    margin: 0;
    padding: 0;
  }

  .pr-section {
    padding: 12px 0;
    break-inside: avoid;
  }

  .pr-workbench {
    display: block;
  }

  .pr-note {
    padding: 5px 0;
    border: 0;
  }

  .pr-chapter > h2 {
    break-after: avoid;
  }

  .pr-hero {
    padding: 0;
    border: 0;
  }

  .pr-table {
    font-size: 9pt;
  }

  .pr-table th,
  .pr-table td {
    padding: 4px;
  }
}

/* Integración con la arquitectura de pizarrones de valor-absoluto. */
.pr-page .seq-layout {
  display: grid;
  grid-template-columns: minmax(205px, 245px) minmax(0, 1fr);
  gap: 28px;
  max-width: 1440px;
  margin: 24px auto;
  padding: 0 20px 64px;
  align-items: start;
}

.pr-page .seq-sidebar {
  position: sticky;
  top: 5rem;
  max-height: calc(100vh - 6rem);
  overflow: auto;
}

.pr-page .seq-content {
  min-width: 0;
}

.pr-page .seq-blackboard-toolbar {
  position: sticky;
  z-index: 30;
  top: 56px;
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 12px;
  padding: 10px 14px;
  border: 1px solid var(--line, var(--border));
  background: var(--bg);
}

header[data-site-nav] {
  z-index: 40;
  background: var(--bg);
}

.pr-page .seq-blackboard-toolbar__info {
  display: grid;
  gap: 3px;
  min-width: 0;
  flex: 1 1 auto;
}

.pr-page .seq-blackboard-toolbar__badge {
  color: var(--yellow);
  font-size: 0.8rem;
  font-weight: 700;
}

.pr-page .seq-chalk-tray {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 12px;
  margin-top: 24px;
  padding: 12px 0;
  border-top: 1px dashed var(--line, var(--border));
}

.pr-page .seq-content.mode-blackboard .seq-section:not(.is-active),
.pr-page .seq-content.mode-blackboard #sec-retos:not(.is-active),
.pr-page .seq-content.mode-blackboard #sec-repaso:not(.is-active) {
  display: none;
}

.pr-page .seq-section {
  min-width: 0;
}

.pr-page .seq-section__header {
  margin-bottom: 22px;
}

.pr-page .seq-section__tag {
  color: var(--muted);
  font-size: 0.78rem;
  font-weight: 700;
  letter-spacing: 0.07em;
}

.pr-page .seq-section__title {
  margin: 6px 0 14px;
  color: var(--ink);
  font-family: var(--font-hand);
  font-size: clamp(1.7rem, 3.4vw, 2.4rem);
}

.pr-page .seq-block {
  min-width: 0;
  margin: 0 0 18px;
  padding: 14px 16px;
  border-bottom: 1px solid var(--line, var(--border));
}

.pr-page .seq-block__label {
  display: block;
  margin-bottom: 8px;
  color: var(--yellow);
  font-size: 0.76rem;
  font-weight: 700;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

.pr-page .seq-block--phrase blockquote,
.pr-page blockquote.seq-phrase-text {
  margin: 0;
  padding: 4px 0 4px 16px;
  color: var(--ink);
  font: 700 clamp(1.25rem, 2.3vw, 1.65rem) var(--font-hand);
  line-height: 1.35;
}

.pr-page .seq-block p {
  line-height: 1.68;
}

.pr-page .seq-block--try {
  border: 1px solid var(--line, var(--border));
  background: var(--surface, var(--bg));
  box-shadow: 0 8px 24px rgb(0 0 0 / 12%);
}

.pr-page .gloss-term {
  padding: 0;
  border: 0;
  border-bottom: 1.5px dashed var(--yellow);
  border-radius: 0;
  color: var(--yellow);
  background: none;
  font: inherit;
  cursor: help;
}

.pr-page .gloss-term:focus-visible {
  outline: 2px solid var(--yellow);
  outline-offset: 2px;
}

.pr-page .pr-theory-column {
  min-width: 0;
}

.pr-page .pr-annotated-host {
  margin: 14px 0 22px;
}

.pr-page .pr-widget > svg.pr-board-svg {
  width: 100%;
  max-width: 100%;
  height: auto;
  min-height: 180px;
  max-height: 280px;
}

.pr-page .pr-probe .pr-widget__controls {
  gap: 8px 12px;
  font-size: 0.85rem;
}

.pr-page .pr-root-index {
  display: inline-block;
  margin-right: -0.08em;
  font-size: 0.48em;
  line-height: 1;
  vertical-align: top;
}

.pr-page .pr-root-index .af-token {
  min-width: 26px;
  min-height: 28px;
  padding: 2px 4px;
  gap: 1px;
}

.pr-page .pr-root-index .af-token__main {
  font-size: 1rem;
}

.pr-page .pr-root-index .af-token__sub {
  font-size: 0.46rem;
}

.pr-page button svg.chalk-icon,
.pr-page .btn svg,
.pr-page .chip svg {
  flex: 0 0 18px;
  width: 18px;
  height: 18px;
  max-width: 18px;
  max-height: 18px;
}

.pr-page .pr-check__actions,
.pr-page .pr-tutor-actions,
.pr-page .pr-trap__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
}

.pr-page .pr-check__preview {
  min-height: 1.5em;
  color: var(--muted);
}

.pr-page .pr-check__solution[hidden],
.pr-page .pr-check__hint[hidden] {
  display: none;
}

.pr-page .pr-pair-inputs {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 10px;
}

.pr-page .pr-table-wrap {
  overflow-x: auto;
}

.pr-page .seq-chapter-banner {
  margin: 28px 0 12px;
  padding: 18px;
  background: var(--surface, var(--bg));
}

@media (max-width: 900px) {
  .pr-page .seq-layout {
    grid-template-columns: minmax(0, 1fr);
    gap: 18px;
    padding-inline: 14px;
  }

  .pr-page .seq-sidebar {
    position: static;
    max-height: none;
  }
}

@media (max-width: 600px) {
  .pr-page .seq-chalk-tray {
    flex-wrap: wrap;
  }

  .pr-page .seq-chalk-tray__info {
    order: -1;
    width: 100%;
    text-align: center;
  }

  .pr-page .pr-pair-inputs {
    grid-template-columns: minmax(0, 1fr);
  }
}

@media print {
  .pr-page .seq-sidebar,
  .pr-page .seq-blackboard-toolbar,
  .pr-page .seq-chalk-tray,
  .pr-page .pr-probe,
  .pr-page .pr-tutor-actions {
    display: none !important;
  }

  .pr-page .seq-layout {
    display: block;
    max-width: none;
    margin: 0;
    padding: 0;
  }

  .pr-page .seq-content.mode-blackboard .seq-section:not(.is-active) {
    display: block;
  }
}

.pr-chapter-tabs {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin: 18px 0;
}

.pr-chapter-tab {
  min-height: 42px;
}

.pr-challenge-panel[hidden] {
  display: none;
}

.pr-page .pr-trap__wrong,
.pr-page .pr-trap__proof {
  min-width: 0;
}

.pr-page .pr-trap__proof h4 {
  color: var(--green);
}

.pr-page .pr-trap__wrong h4 {
  color: var(--pink);
}

/* Este laboratorio comparte la navegación de Sucesiones, pero necesita espacio
   adicional para el índice lateral y su mesa de trabajo de dos columnas. */
.pr-page.page--wide {
  width: 85%;
  max-width: none;
  padding-inline: 0;
}

/* El encabezado global duplicaba el hero didáctico del laboratorio y empujaba
   el primer pizarrón fuera del alto inicial. Conservamos el hero contextual
   dentro de la mesa, que es el que muestra el progreso y la secuencia. */
.pr-page.page--wide > .page-header {
  display: none;
}

.pr-page .seq-layout {
  width: 96vw;
  max-width: 1560px;
  margin-inline: auto;
  box-sizing: border-box;
}

.pr-page .seq-blackboard-toolbar {
  margin-bottom: 20px;
}

.pr-page .seq-section {
  padding-top: 20px;
  scroll-margin-top: 115px;
}

.pr-page .pr-aha-box {
  margin: 20px 0;
  padding: 14px 16px;
  background: color-mix(in srgb, var(--teal, var(--yellow)) 9%, transparent);
}

.pr-page .pr-aha-box strong {
  display: block;
  margin-bottom: 6px;
  color: var(--teal, var(--yellow));
  font-family: var(--font-hand);
  font-size: 1.12rem;
}

.pr-page .pr-learning-table {
  margin: 16px 0 4px;
  border-collapse: collapse;
  font-size: 0.91rem;
}

.pr-page .pr-learning-table th,
.pr-page .pr-learning-table td {
  padding: 9px 10px;
  border: 1px solid var(--line, var(--border));
  text-align: left;
  vertical-align: top;
}

.pr-page .pr-learning-table thead th {
  color: var(--yellow);
}

.pr-page .pr-forward-link {
  margin-top: 16px;
  padding-left: 12px;
  color: var(--muted);
  font-style: italic;
}

/* Navegación del laboratorio: el documento conserva el único scroll de lectura.
   El índice se desplaza sólo dentro de su propia lista cuando el curso es largo. */
.pr-page {
  --pr-nav-h: 56px;
  --pr-sidebar-w: 250px;
}

.pr-page .seq-layout {
  display: block;
  width: auto;
  max-width: none;
  margin: 24px 24px 0 calc(var(--pr-sidebar-w) + 24px);
  padding: 0 0 64px;
  transition: margin-left 220ms ease;
}

.pr-page .seq-sidebar {
  position: fixed;
  z-index: 8;
  top: var(--pr-nav-h);
  left: 0;
  width: var(--pr-sidebar-w);
  height: calc(100vh - var(--pr-nav-h));
  max-height: none;
  box-sizing: border-box;
  overflow-y: auto;
  overflow-x: hidden;
  padding: 20px 16px 28px;
  background: color-mix(in srgb, var(--bg) 96%, var(--surface));
  border-right: 1px solid var(--line, var(--border));
  scrollbar-width: thin;
  scrollbar-color: var(--muted) transparent;
  transition: transform 220ms ease;
}

.pr-page .seq-sidebar::-webkit-scrollbar {
  width: 7px;
}

.pr-page .seq-sidebar::-webkit-scrollbar-thumb {
  background: color-mix(in srgb, var(--muted) 58%, transparent);
  border-radius: 99px;
}

.pr-page .pr-sidebar-toggle {
  position: static;
  flex: 0 0 auto;
  min-height: 36px;
  padding: 6px 10px;
  border: 1px solid var(--line, var(--border));
  border-radius: 8px;
  background: var(--surface, var(--bg));
  color: var(--yellow);
  font: 700 0.82rem var(--font-hand);
  cursor: pointer;
  transition: background 160ms ease;
}

.pr-page .seq-blackboard-toolbar__actions {
  flex: 0 0 auto;
}

.pr-page .seq-sidebar .pr-sidebar-close {
  display: none !important;
}

.pr-page.is-sidebar-collapsed .seq-layout {
  margin-left: 24px;
}

.pr-page.is-sidebar-collapsed .seq-sidebar {
  transform: translateX(calc(-1 * var(--pr-sidebar-w)));
}

.pr-page .seq-blackboard-toolbar {
  top: var(--pr-nav-h);
  scroll-margin-top: calc(var(--pr-nav-h) + 16px);
}

/* La barra sticky ocupa el primer renglón del viewport. Esta reserva deja
   entero el kicker, el título, las acciones de Alaska y la frase-guía. */
.pr-page .seq-section {
  scroll-margin-top: calc(var(--pr-nav-h) + 76px);
  padding-top: 20px;
}

@media (min-width: 1120px) {
  .pr-page .pr-workbench::after {
    display: table;
    clear: both;
    content: "";
  }

  .pr-page .pr-probe {
    float: right;
    width: clamp(360px, 42%, 500px);
    margin: 0 0 24px 28px;
    padding: 14px 16px;
    position: relative;
    z-index: 2;
    box-sizing: border-box;
    max-height: none;
    overflow: visible;
  }

  .pr-page .seq-block--check {
    clear: both;
  }

}

@media (max-width: 1119px) {
  .pr-page .pr-probe {
    float: none;
    width: 100%;
    margin: 16px 0;
    box-sizing: border-box;
  }

  .pr-page .seq-sidebar .pr-sidebar-close {
    display: grid !important;
    width: 30px !important;
    min-width: 30px !important;
    height: 30px !important;
    min-height: 30px !important;
    margin: 0 0 12px auto;
    padding: 0 !important;
    place-items: center;
    border: 1px solid var(--line, var(--border));
    border-radius: 50%;
    background: var(--surface, var(--bg));
    color: var(--ink);
    font: 700 0.9rem var(--font-body);
    cursor: pointer;
  }
}

@media (max-width: 900px) {
  .pr-page .seq-layout,
  .pr-page.is-sidebar-collapsed .seq-layout {
    margin: 16px 14px 0;
  }

  .pr-page .seq-sidebar {
    width: min(84vw, 280px);
    transform: translateX(-100%);
  }

  .pr-page.is-sidebar-collapsed .seq-sidebar {
    transform: translateX(-100%);
  }

  .pr-page:not(.is-sidebar-collapsed) .seq-sidebar {
    transform: translateX(0);
  }

}