/* Estilos propios de biblioteca/temas/ley-de-los-signos/ejercicios/combinacion-de-signos/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);
}



.status {
  display: inline-block;
  margin-bottom: 2.7rem;
  padding: 0.32rem 0.55rem;
  border: 1px solid var(--color-border);
  color: var(--color-muted);
  font-size: 0.67rem;
  font-weight: 800;
  letter-spacing: 0.1em;
  text-transform: uppercase;
}

.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);
}



.answer-fieldset,
.sign-choice-fieldset,
.calculator-form fieldset {
  min-width: 0;
  margin: 0;
  padding: 0;
  border: 0;
}

.answer-fieldset > legend,
.sign-choice-fieldset > legend,
.calculator-form legend {
  width: 100%;
  margin-bottom: 1.2rem;
  font-weight: 850;
  text-align: center;
}

.interactive-actions {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 0.75rem;
  margin-top: 1.75rem;
}

.learning-button {
  display: inline-flex;
  min-height: 48px;
  align-items: center;
  justify-content: center;
  padding: 0.78rem 1.15rem;
  border: 1px solid var(--color-text);
  border-radius: var(--radius);
  background: var(--color-dark);
  color: var(--color-light);
  font: inherit;
  font-size: 0.9rem;
  font-weight: 850;
  line-height: 1.2;
  text-align: center;
  text-decoration: none;
  cursor: pointer;
  transition: background-color 160ms ease, color 160ms ease, transform 160ms ease;
}

.learning-button:hover:not(:disabled) {
  transform: translateY(-2px);
}

.learning-button:disabled {
  cursor: not-allowed;
  opacity: 0.45;
}

.learning-button-primary {
  border-color: var(--learning-blue);
  background: var(--learning-blue);
}

.learning-button-primary:hover:not(:disabled) {
  background: var(--learning-blue-dark);
}

.learning-button-secondary {
  background: transparent;
  color: var(--color-text);
}

.learning-button-secondary:hover:not(:disabled) {
  background: var(--color-surface-strong);
}

.sign-choice-fieldset {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 0.75rem;
  margin-top: 0.75rem;
}

.sign-choice-fieldset legend {
  grid-column: 1 / -1;
}

.sign-choice {
  position: relative;
  display: block;
  cursor: pointer;
}

.sign-choice input {
  position: absolute;
  inset: 0;
  opacity: 0;
}

.sign-choice span {
  display: grid;
  min-height: 58px;
  place-items: center;
  padding: 0.75rem;
  border: 1px solid var(--color-text);
  background: var(--color-background);
  font-weight: 800;
}

.sign-choice input:checked + span {
  background: var(--color-dark);
  color: var(--color-light);
}

.sign-choice input:focus-visible + span {
  outline: 3px solid var(--color-text);
  outline-offset: 3px;
}

.answer-feedback.is-incorrect,
.answer-feedback.is-error,
.form-message {
  color: var(--learning-red);
}





@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);
  }

.numeric-examples > div,
  .sign-choice-fieldset {
    grid-template-columns: 1fr;
  }

.sign-calculator > .learning-button {
    width: 100%;
  }

.game-choice-buttons .learning-button {
    flex: 1;
  }
}

@media (max-width: 640px) {

.task-board-toolbar,
  .task-board-toolbar .learning-button {
    width: 100%;
  }

.task-dialog-actions .learning-button {
    flex: 1;
  }
}

/* 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 Ley de los signos. */
.sign-theme {
  --module-accent: #6b3fad;
  --sign-accent: #6b3fad;
  --sign-accent-dark: #4b287e;
  --sign-soft: #f1ebf9;
  --sign-positive: #116b55;
  --sign-positive-soft: #e5f4ef;
  --sign-negative: #a23a43;
  --sign-negative-soft: #faeaec;
  --sign-ink: #21152f;
}

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

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

.sign-theme .katex-display {
  max-width: 100%;
  margin: 0.7rem 0;
  overflow-x: auto;
  overflow-y: hidden;
  padding: 0.2rem;
}

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

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

.sign-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;
}

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

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

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

.sign-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;
}

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

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

.sign-section {
  scroll-margin-top: calc(var(--header-height) + 4rem);
}

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

.sign-section-heading {
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(260px, 0.55fr);
  align-items: end;
  gap: 2rem;
  margin-bottom: 2.3rem;
}

.sign-section-heading h2 {
  margin: 0;
  font-size: clamp(2.2rem, 5vw, 4rem);
  line-height: 1.05;
  letter-spacing: -0.04em;
}

.sign-section-heading p {
  margin: 0;
  color: var(--color-muted);
}

.sign-context-grid,
.sign-concept-grid,
.sign-rule-grid,
.sign-example-grid,
.sign-error-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1.2rem;
}

.sign-context-grid {
  grid-template-columns: repeat(3, minmax(0, 1fr));
}

.sign-card,
.sign-rule-card,
.sign-error-card {
  padding: clamp(1.25rem, 3vw, 2rem);
  border-top: 3px solid var(--sign-accent);
  background: #fff;
}

.sign-section:nth-of-type(odd) .sign-card,
.sign-section:nth-of-type(odd) .sign-rule-card,
.sign-section:nth-of-type(odd) .sign-error-card {
  background: var(--color-surface);
}

.sign-card h3,
.sign-rule-card h3,
.sign-error-card h3 {
  margin-top: 0;
}

.sign-value {
  display: inline-grid;
  min-width: 58px;
  min-height: 58px;
  place-items: center;
  border: 2px solid currentColor;
  border-radius: 50%;
  font-size: 1.35rem;
  font-weight: 900;
}

.sign-value.is-positive {
  color: var(--sign-positive);
}

.sign-value.is-negative {
  color: var(--sign-negative);
}

.sign-value.is-zero {
  color: var(--color-text);
}

.sign-math-block {
  margin: 1rem 0;
  padding: 1rem;
  border-left: 3px solid var(--sign-accent);
  background: var(--sign-soft);
  color: var(--sign-ink);
  font-size: clamp(1rem, 2vw, 1.2rem);
  text-align: center;
}

.number-line-visual {
  margin: 2rem 0;
  padding: 1.5rem;
  border: 1px solid var(--color-border);
  background: #fff;
}

.number-line-visual svg {
  width: 100%;
  min-width: 620px;
}

.number-line-scroll {
  overflow-x: auto;
}

.sign-rule-summary {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1px;
  margin: 1.5rem 0;
  padding: 1px;
  background: var(--color-border);
}

.sign-rule-summary p {
  margin: 0;
  padding: 1.2rem;
  background: #fff;
}

.sign-rule-summary strong,
.sign-rule-summary span {
  display: block;
}

.sign-rule-summary span {
  margin-top: 0.35rem;
  color: var(--color-muted);
}

.sign-table {
  width: 100%;
  border-collapse: collapse;
  background: #fff;
}

.sign-table th,
.sign-table td {
  padding: 0.85rem;
  border: 1px solid var(--color-border);
  text-align: left;
}

.sign-table th {
  background: var(--color-dark);
  color: #fff;
}

.sign-table td:last-child {
  font-weight: 900;
}

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

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

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

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

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

.sign-step-list li::before {
  position: absolute;
  top: 0.75rem;
  left: 0;
  display: grid;
  width: 1.8rem;
  height: 1.8rem;
  place-items: center;
  border: 1px solid var(--sign-accent);
  border-radius: 50%;
  color: var(--sign-accent);
  content: counter(sign-step);
  font-size: 0.78rem;
  font-weight: 850;
}

.sign-interactive-panel {
  padding: clamp(1.25rem, 4vw, 2.5rem);
  border-top: 3px solid var(--sign-accent);
  background: var(--color-surface);
}

.sign-interactive-heading {
  display: grid;
  grid-template-columns: minmax(0, 1fr) auto;
  gap: 1.5rem;
  margin-bottom: 1.5rem;
}

.sign-interactive-heading h2 {
  margin: 0;
  font-size: clamp(1.9rem, 4vw, 3rem);
  line-height: 1.1;
}

.sign-interactive-heading p {
  max-width: 760px;
  margin: 0.6rem 0 0;
  color: var(--color-muted);
}

.sign-level-mark {
  display: grid;
  width: 58px;
  aspect-ratio: 1;
  place-items: center;
  border: 2px solid var(--sign-accent);
  border-radius: 50%;
  color: var(--sign-accent);
  font-size: 1.25rem;
  font-weight: 900;
}

.generated-sign-math {
  display: grid;
  min-height: 140px;
  place-items: center;
  padding: 1rem;
  border-block: 1px solid var(--color-border);
  background: #fff;
  font-size: clamp(1.7rem, 5vw, 2.8rem);
  text-align: center;
}

.sign-choice-fieldset {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 200px));
  justify-content: center;
  gap: 1rem;
  margin: 1.5rem 0 0;
  padding: 0;
  border: 0;
}

.sign-choice-fieldset legend {
  width: 100%;
  margin-bottom: 1rem;
  font-weight: 900;
  text-align: center;
}

.sign-choice {
  position: relative;
}

.sign-choice input {
  position: absolute;
  opacity: 0;
}

.sign-choice span {
  display: grid;
  min-height: 58px;
  place-items: center;
  border: 2px solid var(--color-text);
  background: #fff;
  font-weight: 900;
  cursor: pointer;
}

.sign-choice input:checked + span {
  border-color: var(--sign-accent);
  background: var(--sign-soft);
  color: var(--sign-accent-dark);
}

.sign-choice input:focus-visible + span {
  outline: 3px solid var(--sign-accent);
  outline-offset: 3px;
}

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

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

.sign-feedback.is-correct {
  border-left-color: var(--sign-positive);
}

.sign-feedback.is-incorrect,
.sign-feedback.is-error {
  border-left-color: var(--sign-negative);
}

.sign-feedback strong {
  display: block;
  margin-bottom: 0.6rem;
}

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

.sign-calculator-grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr) 150px minmax(0, 1fr);
  align-items: end;
  gap: 1rem;
}

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

.sign-field input,
.sign-field select {
  width: 100%;
  min-height: 52px;
  padding: 0.7rem;
  border: 1px solid var(--color-text);
  border-radius: 0;
  background: #fff;
  color: var(--color-text);
  font: inherit;
}

.sign-procedure {
  display: grid;
  gap: 1px;
  margin-top: 2rem;
  border: 1px solid var(--color-border);
  background: var(--color-border);
}

.sign-procedure-step {
  display: grid;
  grid-template-columns: 150px minmax(0, 1fr);
  gap: 1rem;
  padding: 1.1rem;
  background: #fff;
}

.sign-procedure-step > strong {
  color: var(--color-muted);
  font-size: 0.76rem;
  letter-spacing: 0.07em;
  text-transform: uppercase;
}

.sign-procedure-step p {
  margin: 0.3rem 0 0;
  color: var(--color-muted);
}

.sign-procedure-step.is-final {
  background: var(--color-dark);
  color: #fff;
}

.sign-procedure-step.is-final > strong,
.sign-procedure-step.is-final p {
  color: #d8d8d2;
}

.sign-game-rule {
  margin-bottom: 2rem;
  padding: clamp(1.25rem, 4vw, 2.5rem);
  border-left: 4px solid var(--sign-accent);
  background: var(--sign-soft);
}

.sign-game-rule h2 {
  margin-top: 0;
}

.sign-game-equation {
  display: grid;
  min-height: 88px;
  place-items: center;
  margin: 1.25rem 0;
  background: #fff;
  font-size: clamp(1.15rem, 3vw, 1.7rem);
  font-weight: 900;
  text-align: center;
}

.sign-game-board {
  padding: clamp(1rem, 3vw, 2rem);
  border-top: 3px solid var(--sign-accent);
  background: var(--color-surface);
}

.sign-game-board .game-scene {
  border-color: var(--color-border);
  background: #fff;
}

@media (max-width: 900px) {
  .sign-section-heading,
  .sign-calculator-grid {
    grid-template-columns: 1fr;
  }

  .sign-context-grid {
    grid-template-columns: 1fr;
  }

  .sign-calculator-grid .sign-field {
    width: min(100%, 320px);
    justify-self: center;
  }
}

@media (max-width: 700px) {
  .sign-concept-grid,
  .sign-rule-grid,
  .sign-example-grid,
  .sign-error-grid,
  .sign-rule-summary {
    grid-template-columns: 1fr;
  }

  .sign-interactive-heading,
  .sign-procedure-step {
    grid-template-columns: 1fr;
  }

  .sign-level-mark {
    grid-row: 1;
  }

  .sign-choice-fieldset {
    grid-template-columns: 1fr;
  }
}

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

  .sign-card,
  .sign-rule-card,
  .sign-interactive-panel {
    padding-inline: 1rem;
  }
}

@media (prefers-reduced-motion: reduce) {
  .sign-theme *,
  .sign-theme *::before,
  .sign-theme *::after {
    scroll-behavior: auto !important;
  }
}


/* Estilos que ya pertenecían a esta página. */
.sign-interactive-panel .interactive-actions {
  justify-content: center;
}