/* Estilos propios de biblioteca/temas/operaciones-con-fracciones/definiciones/index.html. */

/* Reglas particulares extraídas del antiguo sistema visual. */
.eyebrow {
  display: block;
  margin: 0 0 1.3rem;
  color: var(--color-muted);
  font-size: 0.73rem;
  font-weight: 800;
  letter-spacing: 0.15em;
  text-transform: uppercase;
}

h1,
h2,
h3,
p {
  overflow-wrap: break-word;
}

h1,
h2,
h3 {
  margin-top: 0;
  color: var(--color-text);
  line-height: 1.08;
  letter-spacing: -0.035em;
}

h1 {
  max-width: 820px;
  margin-bottom: 1.5rem;
  font-size: clamp(2.65rem, 6.3vw, 5.9rem);
  font-weight: 900;
}

h2 {
  margin-bottom: 1rem;
  font-size: clamp(2rem, 4vw, 3.6rem);
  font-weight: 850;
}

.lead {
  max-width: 720px;
  margin: 0;
  color: var(--color-muted);
  font-size: clamp(1.05rem, 1.5vw, 1.2rem);
}

.section {
  padding-block: var(--space-section);
}



.faq-list details[open] summary::after { content: "−"; }

.page-hero .lead {
  max-width: 780px;
}

@media (max-width: 640px) {

h1 { font-size: clamp(2.35rem, 13vw, 3.7rem); }

.hero-actions .button { width: 100%; }
}

.learning-site {
  --learning-blue: #1f5fbd;
  --learning-blue-dark: #164991;
  --learning-green: #15784e;
  --learning-red: #b43b3b;
}

.learning-site [hidden] {
  display: none !important;
}

.learning-hero,
.learning-page-hero {
  padding: clamp(4.5rem, 9vw, 8rem) 0;
  background: var(--color-background);
}

.learning-hero h1,
.learning-page-hero h1,
.exam-hero h1 {
  max-width: 1050px;
  margin: 0;
  font-size: clamp(3.2rem, 8vw, 7rem);
  line-height: 0.98;
  letter-spacing: -0.065em;
}

.learning-hero .lead,
.learning-page-hero .lead {
  max-width: 820px;
  margin: clamp(1.5rem, 3vw, 2.25rem) 0 0;
  color: #3b3b37;
  font-size: clamp(1.1rem, 1.7vw, 1.35rem);
  line-height: 1.6;
}

.learning-section-heading p {
  max-width: 760px;
  margin: 1rem 0 0;
  color: var(--color-muted);
  font-size: clamp(1rem, 1.4vw, 1.15rem);
}





@media (max-width: 640px) {
.learning-hero,
  .learning-page-hero,
  .exam-hero {
    padding: 3.5rem 0 4rem;
  }

.learning-hero h1,
  .learning-page-hero h1,
  .exam-hero h1 {
    font-size: clamp(3rem, 15vw, 4.5rem);
  }
}

/* Componentes modulares utilizados por esta página. */
.module-site {
  --module-accent: var(--color-text);
}

.breadcrumbs {
  padding-top: 1.25rem;
  color: var(--color-muted);
  font-size: 0.86rem;
}

.breadcrumbs ol {
  display: flex;
  flex-wrap: wrap;
  gap: 0.35rem 0.55rem;
  margin: 0;
  padding: 0;
  list-style: none;
}

.breadcrumbs li {
  display: inline-flex;
  align-items: center;
  gap: 0.55rem;
}

.breadcrumbs li:not(:last-child)::after {
  content: "/";
  color: #a2a29b;
}

.breadcrumbs a {
  text-decoration: none;
}

.breadcrumbs a:hover {
  text-decoration: underline;
}

@media (max-width: 480px) {
.breadcrumbs {
    font-size: 0.78rem;
  }
}

/* Estilos incorporados desde ../estilos.css. */
/* Sistema compartido únicamente por el tema Operaciones con fracciones. */
.fraction-theme {
  --module-accent: #1f5fbd;
  --fraction-accent: #1f5fbd;
  --fraction-accent-dark: #164991;
  --fraction-soft: #eaf1fb;
  --fraction-ink: #102442;
}

.fraction-theme .catalog-card {
  border-top: 3px solid var(--module-accent);
}

.fraction-theme [hidden] {
  display: none !important;
}

.fraction-theme .katex-display {
  max-width: 100%;
  margin: 0.75rem 0;
  overflow-x: auto;
  overflow-y: hidden;
  padding: 0.25rem 0.1rem;
}

.fraction-theme .katex {
  font-size: 1.08em;
}

.fraction-theme .math-block,
.fraction-theme .math-inline-box {
  max-width: 100%;
  color: var(--fraction-ink);
}

.fraction-theme .math-block {
  margin: 1rem 0;
  padding: 1rem;
  border-left: 3px solid var(--fraction-accent);
  background: var(--fraction-soft);
  font-size: clamp(1rem, 2vw, 1.22rem);
  text-align: center;
}

.fraction-theme .math-inline-box {
  display: inline-flex;
  min-height: 44px;
  align-items: center;
  justify-content: center;
  padding: 0.35rem 0.65rem;
  border: 1px solid var(--color-border);
  background: #fff;
}

.fraction-topic-links {
  display: flex;
  flex-wrap: wrap;
  gap: 0.7rem;
  margin: 2rem 0 0;
  padding: 0;
  list-style: none;
}

.fraction-topic-links a {
  display: inline-flex;
  min-height: 44px;
  align-items: center;
  padding: 0.6rem 0.9rem;
  border: 1px solid var(--color-text);
  background: #fff;
  font-size: 0.86rem;
  font-weight: 800;
  text-decoration: none;
}

.fraction-topic-links a:hover,
.fraction-topic-links a[aria-current="page"] {
  background: var(--color-dark);
  color: #fff;
}

.definition-introduction,
.theory-introduction {
  max-width: 820px;
  color: #383834;
  font-size: clamp(1.05rem, 1.5vw, 1.22rem);
}

.definition-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1rem;
  margin-top: 2.5rem;
}

.definition-card {
  border-top: 3px solid var(--fraction-accent);
  background: var(--color-surface);
}

.definition-card summary {
  display: flex;
  min-height: 70px;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  padding: 1rem 1.25rem;
  font-size: 1.1rem;
  font-weight: 850;
  cursor: pointer;
}

.definition-card summary::after {
  content: "+";
  color: var(--fraction-accent);
  font-size: 1.6rem;
  font-weight: 500;
}

.definition-card[open] summary::after {
  content: "−";
}

.definition-card-content {
  padding: 0 1.25rem 1.35rem;
  border-top: 1px solid var(--color-border);
}

.definition-label {
  margin: 1rem 0 0.35rem;
  color: var(--color-muted);
  font-size: 0.74rem;
  font-weight: 850;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

.definition-simple {
  margin-bottom: 0;
  padding: 0.8rem 1rem;
  border-left: 3px solid var(--fraction-accent);
  background: #fff;
}

.fraction-theory-nav {
  position: sticky;
  top: var(--header-height);
  z-index: 20;
  border-block: 1px solid var(--color-border);
  background: rgb(255 255 255 / 97%);
}

.fraction-theory-nav ul {
  display: flex;
  gap: 1.1rem;
  margin: 0;
  padding: 0.7rem 0;
  overflow-x: auto;
  list-style: none;
  scrollbar-width: thin;
}

.fraction-theory-nav a {
  display: inline-flex;
  min-height: 42px;
  align-items: center;
  border-bottom: 2px solid transparent;
  font-size: 0.82rem;
  font-weight: 800;
  text-decoration: none;
  white-space: nowrap;
}

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

.fraction-theory-section {
  padding: clamp(3.5rem, 7vw, 6rem) 0;
  scroll-margin-top: calc(var(--header-height) + 4.5rem);
}

.fraction-theory-section:nth-of-type(even) {
  background: var(--color-surface);
}

.fraction-theory-heading {
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(260px, 0.55fr);
  align-items: end;
  gap: 2rem;
  margin-bottom: 2.5rem;
}

.fraction-theory-heading h2 {
  max-width: 850px;
  margin: 0;
  font-size: clamp(2.25rem, 5vw, 4.2rem);
  line-height: 1.05;
  letter-spacing: -0.045em;
}

.fraction-theory-heading p {
  margin: 0;
  color: var(--color-muted);
}

.fraction-copy {
  max-width: 860px;
}

.fraction-copy > p {
  font-size: 1.04rem;
}

.visual-fraction-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 1rem;
  margin: 2.5rem 0;
}

.visual-fraction {
  padding: 1.25rem;
  border: 1px solid var(--color-border);
  background: #fff;
  text-align: center;
}

.visual-fraction svg {
  width: 100%;
  max-width: 260px;
  margin: 0 auto 1rem;
}

.visual-fraction rect {
  stroke: var(--color-text);
  stroke-width: 2;
}

.visual-fraction .is-filled {
  fill: var(--fraction-accent);
}

.visual-fraction .is-empty {
  fill: #fff;
}

.visual-fraction strong {
  display: block;
  font-size: 1.15rem;
}

.concept-comparison,
.operation-grid,
.strategy-grid,
.worked-scenarios {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1.25rem;
  margin-top: 2rem;
}

.concept-card,
.operation-card,
.strategy-card,
.worked-scenario {
  padding: clamp(1.25rem, 3vw, 2rem);
  border-top: 2px solid var(--fraction-accent);
  background: #fff;
}

.fraction-theory-section:nth-of-type(odd) .concept-card,
.fraction-theory-section:nth-of-type(odd) .operation-card,
.fraction-theory-section:nth-of-type(odd) .strategy-card,
.fraction-theory-section:nth-of-type(odd) .worked-scenario {
  background: var(--color-surface);
}

.concept-card h3,
.operation-card h3,
.strategy-card h3,
.worked-scenario h3 {
  margin: 0;
  font-size: 1.35rem;
  line-height: 1.25;
}

.step-list {
  display: grid;
  gap: 0;
  margin: 1rem 0 0;
  padding: 0;
  list-style: none;
  counter-reset: fraction-step;
}

.step-list li {
  position: relative;
  padding: 0.85rem 0 0.85rem 2.7rem;
  border-top: 1px solid var(--color-border);
  counter-increment: fraction-step;
}

.step-list li::before {
  position: absolute;
  top: 0.8rem;
  left: 0;
  display: grid;
  width: 1.8rem;
  height: 1.8rem;
  place-items: center;
  border: 1px solid var(--fraction-accent);
  border-radius: 50%;
  color: var(--fraction-accent);
  content: counter(fraction-step);
  font-size: 0.78rem;
  font-weight: 850;
}

.fraction-note {
  margin: 2rem 0;
  padding: 1.25rem 1.4rem;
  border-left: 4px solid var(--fraction-accent);
  background: var(--fraction-soft);
}

.fraction-note > :first-child {
  margin-top: 0;
}

.fraction-note > :last-child {
  margin-bottom: 0;
}

.fraction-component-section {
  padding: clamp(3.5rem, 7vw, 6rem) 0;
}

.component-introduction {
  max-width: 820px;
  margin-bottom: 2rem;
}

.level-jump-list {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 1px;
  margin: 0 0 2rem;
  padding: 1px;
  background: var(--color-border);
  list-style: none;
}

.level-jump-list a {
  display: flex;
  min-height: 74px;
  align-items: center;
  padding: 1rem;
  background: #fff;
  font-weight: 800;
  text-decoration: none;
}

.level-jump-list a:hover {
  background: var(--fraction-soft);
}

.exercise-level,
.fraction-calculator-panel,
.fraction-game-panel {
  padding: clamp(1.25rem, 4vw, 2.5rem);
  border-top: 3px solid var(--fraction-accent);
  background: var(--color-surface);
}

.exercise-level + .exercise-level {
  margin-top: 2rem;
}

.exercise-level-header,
.game-panel-heading {
  display: grid;
  grid-template-columns: minmax(0, 1fr) auto;
  align-items: start;
  gap: 1.5rem;
  margin-bottom: 1.5rem;
}

.exercise-level-header h2,
.game-panel-heading h2 {
  margin: 0;
  font-size: clamp(1.8rem, 4vw, 2.8rem);
  line-height: 1.1;
}

.exercise-level-header p,
.game-panel-heading p {
  max-width: 720px;
  margin: 0.55rem 0 0;
  color: var(--color-muted);
}

.level-number {
  display: grid;
  width: 54px;
  aspect-ratio: 1;
  place-items: center;
  border: 2px solid var(--fraction-accent);
  border-radius: 50%;
  color: var(--fraction-accent);
  font-size: 1.2rem;
  font-weight: 900;
}

.generated-math-question {
  display: grid;
  min-height: 132px;
  place-items: center;
  padding: 1rem;
  border-block: 1px solid var(--color-border);
  background: #fff;
  font-size: clamp(1.45rem, 4.5vw, 2.5rem);
  text-align: center;
}

.fraction-answer-form,
.calculator-input-grid {
  margin-top: 1.5rem;
}

.fraction-answer-fields {
  display: grid;
  grid-template-columns: repeat(2, minmax(130px, 190px));
  justify-content: center;
  gap: 1rem;
}

.fraction-answer-fields.with-sign {
  grid-template-columns: minmax(150px, 210px) repeat(2, minmax(120px, 180px));
}

.field-stack {
  display: grid;
  gap: 0.4rem;
  color: #343430;
  font-size: 0.82rem;
  font-weight: 800;
}

.field-stack input,
.field-stack select,
.operation-select {
  width: 100%;
  min-height: 50px;
  padding: 0.65rem 0.75rem;
  border: 1px solid var(--color-text);
  border-radius: 0;
  background: #fff;
  color: var(--color-text);
  font: inherit;
}

.answer-guidance {
  max-width: 760px;
  margin: 1rem auto 0;
  color: var(--color-muted);
  font-size: 0.88rem;
  text-align: center;
}

.fraction-feedback {
  min-height: 3rem;
  margin-top: 1.25rem;
  padding: 1rem;
  border-left: 4px solid transparent;
  background: #fff;
}

.fraction-feedback:empty {
  min-height: 0;
  padding: 0;
}

.fraction-feedback.is-correct {
  border-left-color: var(--learning-green);
}

.fraction-feedback.is-incorrect,
.fraction-feedback.is-error {
  border-left-color: var(--learning-red);
}

.fraction-feedback strong {
  display: block;
}

.feedback-procedure {
  display: grid;
  gap: 0.45rem;
  margin: 0.8rem 0 0;
  padding-left: 1.2rem;
}

.calculator-input-grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr) 120px minmax(0, 1fr);
  align-items: end;
  gap: 1.25rem;
}

.calculator-fraction-card {
  display: grid;
  grid-template-columns: minmax(130px, 0.7fr) repeat(2, minmax(100px, 1fr));
  gap: 0.75rem;
  padding: 1rem;
  border: 1px solid var(--color-border);
  background: #fff;
}

.calculator-fraction-card legend {
  grid-column: 1 / -1;
  margin-bottom: 0.3rem;
  font-weight: 900;
}

.calculator-operation {
  display: grid;
  gap: 0.4rem;
  font-size: 0.82rem;
  font-weight: 800;
}

.calculator-procedure {
  margin-top: 2rem;
}

.calculator-procedure > h2 {
  margin-bottom: 1.25rem;
}

.procedure-grid {
  display: grid;
  gap: 1px;
  border: 1px solid var(--color-border);
  background: var(--color-border);
}

.procedure-step {
  display: grid;
  grid-template-columns: 150px minmax(0, 1fr);
  gap: 1.25rem;
  padding: 1.15rem;
  background: #fff;
}

.procedure-step-label {
  color: var(--color-muted);
  font-size: 0.75rem;
  font-weight: 850;
  letter-spacing: 0.07em;
  text-transform: uppercase;
}

.procedure-step-content {
  min-width: 0;
}

.procedure-step-content p {
  margin: 0.35rem 0 0;
  color: var(--color-muted);
}

.procedure-step-content .katex-display {
  text-align: left;
}

.final-result-card {
  padding: 1.5rem;
  background: var(--color-dark);
  color: #fff;
}

.final-result-card .procedure-step-label,
.final-result-card p {
  color: #d2d2cd;
}

.games-access-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1.25rem;
}

.game-access-card {
  display: flex;
  min-height: 320px;
  flex-direction: column;
  padding: clamp(1.5rem, 4vw, 2.5rem);
  border-top: 3px solid var(--fraction-accent);
  background: var(--color-surface);
}

.game-access-card h2 {
  margin: 1rem 0 0;
  font-size: clamp(1.75rem, 3vw, 2.5rem);
  line-height: 1.1;
}

.game-access-card p {
  color: var(--color-muted);
}

.game-access-card .text-link {
  margin-top: auto;
}

.game-access-icon {
  display: grid;
  width: 74px;
  aspect-ratio: 1;
  place-items: center;
  border: 2px solid var(--fraction-accent);
  border-radius: 50%;
  color: var(--fraction-accent);
  font-size: 1.6rem;
}

.pie-game-layout {
  display: grid;
  grid-template-columns: minmax(260px, 0.85fr) minmax(0, 1.15fr);
  align-items: center;
  gap: clamp(2rem, 6vw, 5rem);
}

.pie-visual {
  width: min(100%, 440px);
  margin-inline: auto;
  padding: 1rem;
}

.pie-visual svg {
  width: 100%;
  overflow: visible;
  filter: drop-shadow(0 10px 18px rgb(16 36 66 / 8%));
}

.pie-sector {
  fill: #fff;
  stroke: var(--color-text);
  stroke-width: 3;
  vector-effect: non-scaling-stroke;
  transition: fill 140ms ease, transform 140ms ease;
  transform-box: fill-box;
  transform-origin: center;
}

.pie-sector.is-selected {
  fill: var(--fraction-accent);
}

.pie-sector[role="button"] {
  cursor: pointer;
}

.pie-sector[role="button"]:hover {
  fill: #bcd2f2;
}

.pie-sector[role="button"].is-selected:hover {
  fill: var(--fraction-accent-dark);
}

.pie-sector[role="button"]:focus-visible {
  outline: 4px solid var(--fraction-accent);
  outline-offset: 3px;
}

.pie-answer-fields {
  display: grid;
  gap: 1rem;
}

.pie-status {
  margin: 0 0 1rem;
  padding: 0.8rem 1rem;
  border-left: 3px solid var(--fraction-accent);
  background: var(--fraction-soft);
  font-weight: 800;
}

.game-target-math {
  display: grid;
  min-height: 90px;
  place-items: center;
  margin: 1rem 0;
  background: #fff;
  color: var(--fraction-ink);
  font-size: clamp(1.6rem, 4vw, 2.5rem);
}

@media (max-width: 900px) {
  .fraction-theory-heading,
  .pie-game-layout {
    grid-template-columns: 1fr;
  }

  .visual-fraction-grid,
  .level-jump-list {
    grid-template-columns: 1fr;
  }

  .calculator-input-grid {
    grid-template-columns: 1fr;
  }

  .calculator-operation {
    width: min(100%, 240px);
    justify-self: center;
  }
}

@media (max-width: 700px) {
  .definition-grid,
  .concept-comparison,
  .operation-grid,
  .strategy-grid,
  .worked-scenarios,
  .games-access-grid {
    grid-template-columns: 1fr;
  }

  .fraction-answer-fields,
  .fraction-answer-fields.with-sign,
  .calculator-fraction-card {
    grid-template-columns: 1fr;
  }

  .calculator-fraction-card legend {
    grid-column: auto;
  }

  .exercise-level-header,
  .game-panel-heading,
  .procedure-step {
    grid-template-columns: 1fr;
  }

  .level-number {
    grid-row: 1;
  }

  .fraction-theory-nav {
    top: var(--header-height);
  }
}

@media (max-width: 480px) {
  .fraction-theme .katex {
    font-size: 0.98em;
  }

  .math-block,
  .exercise-level,
  .fraction-calculator-panel,
  .fraction-game-panel {
    padding-inline: 1rem;
  }

  .visual-fraction {
    padding-inline: 0.75rem;
  }
}

@media (prefers-reduced-motion: reduce) {
  .pie-sector {
    transition: none;
  }
}