/* Lessons & Educational Activities CSS */

/* City Page */
.city-page {
  padding: var(--space-4);
}

.city-page__container {
  max-width: 1000px;
  margin: 0 auto;
}

.city-header {
  margin-bottom: var(--space-8);
}

.city-header__back-btn {
  background: none;
  border: none;
  font-size: var(--font-size-2xl);
  cursor: pointer;
  padding: var(--space-2);
  min-width: 44px;
  min-height: 44px;
  margin-bottom: var(--space-4);
  color: var(--color-primary);
}

.city-header__title {
  font-size: var(--font-size-3xl);
  font-weight: var(--font-weight-bold);
  color: var(--color-text-primary);
  margin: var(--space-2) 0;
}

.city-header__description {
  font-size: var(--font-size-lg);
  color: var(--color-text-secondary);
  margin: var(--space-3) 0;
}

.city-page__back {
  width: 100%;
  margin-top: var(--space-8);
}

/* Unit Section */
.unit-section {
  margin-bottom: var(--space-10);
}

.unit-header {
  margin-bottom: var(--space-6);
}

.unit-header__title {
  font-size: var(--font-size-2xl);
  font-weight: var(--font-weight-bold);
  color: var(--color-text-primary);
  margin-bottom: var(--space-2);
}

.unit-header__description {
  color: var(--color-text-secondary);
  font-size: var(--font-size-base);
}

/* Lessons Grid */
.lessons-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
  gap: var(--space-6);
  margin-bottom: var(--space-8);
}

.lesson-card {
  background: var(--color-bg-primary);
  border-radius: var(--radius-4);
  padding: var(--space-5);
  box-shadow: var(--shadow-md);
  transition: all var(--duration-normal) var(--ease-smooth);
  cursor: pointer;
  border-left: 4px solid var(--color-primary);
}

.lesson-card:hover {
  box-shadow: var(--shadow-lg);
  transform: translateY(-2px);
}

.lesson-card--completed {
  border-left-color: var(--color-success);
  background: var(--color-lesson-completed-bg);
}

.lesson-card--in-progress {
  border-left-color: var(--color-primary);
  background: var(--color-lesson-in-progress-bg);
}

.lesson-card--available {
  border-left-color: var(--color-sky-bright);
}

.lesson-card--locked {
  border-left-color: var(--color-locked);
  opacity: var(--opacity-disabled);
  cursor: not-allowed;
  background: var(--color-lesson-locked-bg);
}

.lesson-card__header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: var(--space-3);
}

.lesson-card__number {
  font-size: var(--font-size-sm);
  color: var(--color-text-secondary);
  font-weight: var(--font-weight-semibold);
}

.lesson-card__status {
  font-size: var(--font-size-xs);
  padding: var(--space-1) var(--space-3);
  border-radius: var(--radius-full);
  font-weight: var(--font-weight-semibold);
}

.lesson-card__status--completed {
  background: var(--color-success);
  color: var(--color-text-light);
}

.lesson-card__status--in-progress {
  background: var(--color-primary);
  color: var(--color-text-light);
}

.lesson-card__status--available {
  background: var(--color-sky-bright);
  color: var(--color-text-light);
}

.lesson-card__status--locked {
  background: var(--color-locked);
  color: var(--color-text-light);
}

.lesson-card__title {
  font-size: var(--font-size-lg);
  font-weight: var(--font-weight-semibold);
  color: var(--color-text-primary);
  margin-bottom: var(--space-2);
}

.lesson-card__objective {
  font-size: var(--font-size-sm);
  color: var(--color-text-secondary);
  margin-bottom: var(--space-3);
  line-height: 1.5;
}

.lesson-card__meta {
  display: flex;
  gap: var(--space-4);
  font-size: var(--font-size-sm);
  color: var(--color-text-secondary);
}

/* Lesson Page */
.lesson-page {
  padding: var(--space-4) var(--space-4) calc(var(--space-8) + var(--safe-area-bottom));
  background: var(--color-bg-page);
  min-height: 0;
  scroll-padding-bottom: calc(var(--space-8) + var(--safe-area-bottom));
}

.lesson-page__container {
  max-width: 900px;
  margin: 0 auto;
}

.lesson-header {
  margin-bottom: var(--space-6);
}

.lesson-header__back {
  background: none;
  border: none;
  font-size: var(--font-size-lg);
  cursor: pointer;
  color: var(--color-primary);
  margin-bottom: var(--space-3);
  padding: var(--space-2);
  min-height: 44px;
}

.lesson-header__breadcrumb {
  font-size: var(--font-size-sm);
  color: var(--color-text-secondary);
  margin-bottom: var(--space-3);
}

.lesson-header__title {
  font-size: var(--font-size-3xl);
  font-weight: var(--font-weight-bold);
  color: var(--color-text-primary);
  margin: 0;
}

/* Progress Bar */
.lesson-progress {
  margin-bottom: var(--space-8);
}

.lesson-progress__bar {
  width: 100%;
  height: 8px;
  background: var(--color-bg-secondary);
  border-radius: var(--radius-full);
  overflow: hidden;
}

.lesson-progress__fill {
  height: 100%;
  background: linear-gradient(90deg, var(--color-primary), var(--color-sky-bright));
  transition: width 0.3s ease;
}

.lesson-progress__text {
  font-size: var(--font-size-sm);
  color: var(--color-text-secondary);
  margin-top: var(--space-2);
  text-align: center;
}

/* Activity Intro */
.activity-intro {
  padding: var(--space-6);
}

.activity-intro__card {
  background: var(--color-bg-primary);
  border-radius: var(--radius-4);
  padding: var(--space-8);
  box-shadow: var(--shadow-md);
  text-align: center;
}

.activity-intro__emoji {
  font-size: 4rem;
  margin-bottom: var(--space-4);
}

.activity-intro__title {
  font-size: var(--font-size-2xl);
  font-weight: var(--font-weight-bold);
  color: var(--color-text-primary);
  margin-bottom: var(--space-3);
}

.activity-intro__objective {
  font-size: var(--font-size-lg);
  color: var(--color-primary);
  font-weight: var(--font-weight-semibold);
  margin-bottom: var(--space-4);
}

.activity-intro__description {
  font-size: var(--font-size-base);
  color: var(--color-text-secondary);
  line-height: 1.6;
  margin-bottom: var(--space-6);
}

.activity-intro__estimate {
  background: var(--color-bg-secondary);
  padding: var(--space-3) var(--space-4);
  border-radius: var(--radius-3);
  margin-bottom: var(--space-6);
  font-weight: var(--font-weight-semibold);
}

.activity-intro__reward {
  background: linear-gradient(135deg, rgba(109, 213, 231, 0.1), rgba(155, 89, 182, 0.1));
  padding: var(--space-5);
  border-radius: var(--radius-4);
  margin-bottom: var(--space-6);
  border-left: 4px solid var(--color-accent);
}

.reward-items {
  display: flex;
  gap: var(--space-6);
  justify-content: center;
  margin-top: var(--space-3);
}

.reward-item {
  font-size: var(--font-size-lg);
  font-weight: var(--font-weight-bold);
  color: var(--color-primary);
}

.activity-intro__actions {
  display: flex;
  gap: var(--space-4);
  justify-content: center;
  margin-top: var(--space-6);
  padding-bottom: var(--space-6);
}

.btn-large {
  padding: var(--space-4) var(--space-8);
  font-size: var(--font-size-lg);
  font-weight: var(--font-weight-semibold);
}

/* Vocabulary Activity */
.activity-vocabulary {
  padding: var(--space-6);
}

.vocabulary-card {
  background: var(--color-bg-primary);
  border-radius: var(--radius-4);
  padding: var(--space-8);
  box-shadow: var(--shadow-md);
  text-align: center;
  min-height: 400px;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
}

.vocabulary-card__header {
  text-align: right;
  font-size: var(--font-size-sm);
  color: var(--color-text-secondary);
  margin-bottom: var(--space-4);
}

.vocabulary-card__word {
  font-size: var(--font-size-4xl);
  font-weight: var(--font-weight-bold);
  color: var(--color-primary);
  margin-bottom: var(--space-2);
}

.vocabulary-card__pronunciation {
  font-size: var(--font-size-base);
  color: var(--color-text-secondary);
  font-style: italic;
  margin-bottom: var(--space-4);
}

.vocabulary-card__translation {
  font-size: var(--font-size-2xl);
  color: var(--color-text-primary);
  margin-bottom: var(--space-6);
}

.vocabulary-card__example {
  background: var(--color-bg-secondary);
  padding: var(--space-4);
  border-radius: var(--radius-3);
  margin-bottom: var(--space-6);
  text-align: left;
}

.vocabulary-card__example p {
  margin: var(--space-2) 0;
  font-size: var(--font-size-sm);
}

.example-en {
  color: var(--color-ocean-deep);
  font-style: italic;
}

.example-es {
  color: var(--color-text-secondary);
  font-style: italic;
}

.vocabulary-navigation {
  display: flex;
  gap: var(--space-3);
  justify-content: center;
  align-items: center;
  margin-top: var(--space-6);
  flex-wrap: wrap;
}

.vocab-counter {
  font-weight: var(--font-weight-semibold);
  min-width: 60px;
  text-align: center;
}

.vocab-continue {
  margin-left: auto;
}

/* Phrases Activity */
.activity-phrases {
  padding: var(--space-6);
}

.phrases-card {
  background: var(--color-bg-primary);
  border-radius: var(--radius-4);
  padding: var(--space-8);
  box-shadow: var(--shadow-md);
  min-height: 350px;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
}

.phrases-card__header {
  text-align: right;
  font-size: var(--font-size-sm);
  color: var(--color-text-secondary);
  margin-bottom: var(--space-4);
}

.phrases-card__situation {
  background: var(--color-bg-secondary);
  padding: var(--space-3);
  border-radius: var(--radius-3);
  margin-bottom: var(--space-4);
  font-size: var(--font-size-base);
  text-align: left;
}

.phrases-card__english {
  padding: var(--space-4);
  background: rgba(109, 213, 231, 0.1);
  border-radius: var(--radius-3);
  margin-bottom: var(--space-4);
  text-align: left;
}

.phrases-card__spanish {
  padding: var(--space-4);
  background: rgba(155, 89, 182, 0.1);
  border-radius: var(--radius-3);
  margin-bottom: var(--space-4);
  text-align: left;
}

.phrase-text {
  font-size: var(--font-size-xl);
  font-weight: var(--font-weight-semibold);
}

.phrases-navigation {
  display: flex;
  gap: var(--space-3);
  justify-content: center;
  align-items: center;
  margin-top: var(--space-6);
  flex-wrap: wrap;
}

.phrases-counter {
  font-weight: var(--font-weight-semibold);
  min-width: 60px;
  text-align: center;
}

/* Exercise Activity */
.activity-exercises {
  padding: var(--space-6);
}

.exercises-progress {
  margin-bottom: var(--space-6);
}

.exercises-progress__fill {
  height: 6px;
  background: linear-gradient(90deg, var(--color-primary), var(--color-sky-bright));
  border-radius: var(--radius-full);
  transition: width 0.3s ease;
}

.exercises-progress__text {
  text-align: center;
  font-size: var(--font-size-sm);
  color: var(--color-text-secondary);
  margin-top: var(--space-2);
}

.exercise-wrapper {
  background: var(--color-bg-primary);
  border-radius: var(--radius-4);
  padding: var(--space-8);
  box-shadow: var(--shadow-md);
  min-height: 300px;
}

.exercise-container {
  display: flex;
  flex-direction: column;
  gap: var(--space-6);
}

.exercise-instruction {
  font-size: var(--font-size-base);
  font-weight: var(--font-weight-semibold);
  color: var(--color-text-primary);
  background: var(--color-bg-secondary);
  padding: var(--space-4);
  border-radius: var(--radius-3);
}

.exercise-content {
  display: flex;
  flex-direction: column;
  gap: var(--space-4);
}

.exercise-prompt {
  font-size: var(--font-size-xl);
  font-weight: var(--font-weight-semibold);
  color: var(--color-text-primary);
  padding: var(--space-4);
  text-align: center;
}

.dialogue-line {
  text-align: left;
  margin: var(--space-2) 0;
  font-size: var(--font-size-base);
}

.exercise-options {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--space-3);
}

.exercise-option {
  background: var(--color-bg-secondary);
  border: 2px solid transparent;
  padding: var(--space-4);
  border-radius: var(--radius-3);
  font-size: var(--font-size-base);
  cursor: pointer;
  transition: all 0.2s ease;
  text-align: center;
  font-weight: var(--font-weight-medium);
  min-height: 44px;
  display: flex;
  align-items: center;
  justify-content: center;
}

.exercise-option:hover {
  background: var(--color-bg-tertiary);
  border-color: var(--color-primary);
}

.exercise-option:focus {
  outline: 2px solid var(--color-primary);
  outline-offset: 2px;
}

.exercise-option-true-false {
  grid-template-columns: 1fr 1fr;
}

.exercise-input {
  width: 100%;
  padding: var(--space-3) var(--space-4);
  font-size: var(--font-size-base);
  border: 2px solid var(--color-primary);
  border-radius: var(--radius-3);
  font-family: inherit;
  min-height: 44px;
}

.exercise-input:focus {
  outline: none;
  border-color: var(--color-sky-bright);
  box-shadow: 0 0 0 3px rgba(109, 213, 231, 0.1);
}

.exercise-input-group {
  display: flex;
  gap: var(--space-3);
  align-items: center;
}

.exercise-submit {
  white-space: nowrap;
  flex-shrink: 0;
}

.exercise-feedback {
  background: var(--color-bg-secondary);
  border-left: 4px solid var(--color-success);
  border-radius: var(--radius-3);
  padding: var(--space-6);
  text-align: center;
  animation: slideIn 0.3s ease;
}

.exercise-feedback__status {
  font-size: var(--font-size-2xl);
  font-weight: var(--font-weight-bold);
  margin-bottom: var(--space-4);
}

.exercise-feedback__status--correct {
  color: var(--color-success);
}

.exercise-feedback__status--incorrect {
  color: var(--color-error);
  border-left-color: var(--color-error);
}

.exercise-feedback__explanation {
  font-size: var(--font-size-base);
  color: var(--color-text-secondary);
  margin-bottom: var(--space-4);
  line-height: 1.6;
}

.exercise-feedback__button {
  margin-top: var(--space-3);
}

.mistake-review__title {
  color: var(--color-text-primary);
  font-size: var(--font-size-2xl);
  margin-bottom: var(--space-2);
  text-align: center;
}

.mistake-review__intro {
  color: var(--color-text-secondary);
  line-height: 1.6;
  margin: 0 auto var(--space-4);
  max-width: 42rem;
  text-align: center;
}

.mistake-review__progress {
  font-weight: var(--font-weight-semibold);
}

.activity-mistake-review button {
  min-height: 48px;
}

/* Word Order */
.exercise-word-bank {
  text-align: center;
  margin-bottom: var(--space-4);
  min-width: 0;
}

.exercise-word-buttons {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-2);
  justify-content: center;
  margin-top: var(--space-3);
}

.exercise-word-button {
  background: var(--color-primary);
  color: white;
  border: none;
  padding: var(--space-2) var(--space-4);
  border-radius: var(--radius-full);
  cursor: pointer;
  font-size: var(--font-size-base);
  font-weight: var(--font-weight-medium);
  transition: all 0.2s ease;
  min-height: 44px;
  display: inline-flex;
  align-items: center;
  max-width: 100%;
  overflow-wrap: anywhere;
}

.exercise-word-button:focus-visible,
.exercise-remove-word:focus-visible {
  outline: 3px solid var(--color-primary);
  outline-offset: 3px;
}

.exercise-word-button:hover:not(:disabled) {
  background: var(--color-sky-bright);
  transform: scale(1.05);
}

.exercise-word-button:disabled {
  background: var(--color-locked);
  cursor: not-allowed;
  opacity: 0.5;
}

.exercise-word-button--selected {
  background: var(--color-locked);
  opacity: 0.5;
}

.exercise-word-order {
  background: var(--color-bg-secondary);
  padding: var(--space-4);
  border-radius: var(--radius-3);
  min-height: 60px;
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: var(--space-2);
  justify-content: center;
  min-width: 0;
  overflow-wrap: anywhere;
}

.exercise-remove-word {
  background: var(--color-error);
  color: white;
  border: none;
  border-radius: 50%;
  width: 24px;
  height: 24px;
  cursor: pointer;
  font-size: var(--font-size-base);
  margin-left: var(--space-1);
  display: inline-flex;
  align-items: center;
  justify-content: center;
}

.sentence-builder-board {
  display: grid;
  gap: var(--space-4);
  min-width: 0;
  text-align: left;
}

.sentence-builder-board__section {
  display: grid;
  gap: var(--space-2);
  min-width: 0;
}

.sentence-builder-board__label {
  margin: 0;
  color: var(--color-text-primary);
  font-size: var(--font-size-base);
}

.sentence-builder-board__bank {
  margin-top: 0;
  min-width: 0;
}

.sentence-builder-board__sentence {
  justify-content: flex-start;
  min-height: 72px;
}

.sentence-builder-board__selected-token {
  width: auto;
  min-width: 44px;
  height: auto;
  min-height: 44px;
  padding: var(--space-2) var(--space-3);
  border-radius: var(--radius-full);
  gap: var(--space-2);
  overflow-wrap: anywhere;
}

.sentence-builder-board__selected-token > span:last-child {
  font-size: var(--font-size-xl);
  line-height: 1;
}

.sentence-builder-board__selected-token:disabled {
  cursor: default;
  opacity: 0.75;
}

.sentence-builder-board__placeholder,
.sentence-builder-board__empty,
.sentence-builder-board__bank p {
  margin: 0;
}

.sentence-builder-board__actions {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: var(--space-3);
}

.sentence-builder-board__actions .btn {
  min-width: 0;
  min-height: 44px;
  white-space: normal;
}

@media (max-width: 22rem) {
  .sentence-builder-board__actions {
    grid-template-columns: 1fr;
  }
}

/* Matching */
.exercise-matching {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--space-6);
}

.matching-column {
  display: flex;
  flex-direction: column;
  gap: var(--space-2);
}

.matching-item {
  background: var(--color-bg-secondary);
  border: 2px solid transparent;
  padding: var(--space-3) var(--space-4);
  border-radius: var(--radius-3);
  cursor: pointer;
  font-size: var(--font-size-base);
  text-align: center;
  font-weight: var(--font-weight-medium);
  transition: all 0.2s ease;
  min-height: 44px;
  display: flex;
  align-items: center;
  justify-content: center;
}

.matching-item:hover {
  background: var(--color-bg-tertiary);
  border-color: var(--color-primary);
}

.matching-item--selected {
  background: var(--color-primary);
  color: white;
  border-color: var(--color-primary);
}

/* Result Activity */
.activity-result {
  padding: var(--space-6);
}

.result-card {
  background: var(--color-bg-primary);
  border-radius: var(--radius-4);
  padding: var(--space-8);
  box-shadow: var(--shadow-lg);
  text-align: center;
}

.result-emoji {
  font-size: 5rem;
  margin-bottom: var(--space-4);
  animation: bounce 0.6s ease;
}

.result-title {
  font-size: var(--font-size-2xl);
  font-weight: var(--font-weight-bold);
  color: var(--color-text-primary);
  margin-bottom: var(--space-6);
}

.result-score-section {
  background: var(--color-bg-secondary);
  padding: var(--space-6);
  border-radius: var(--radius-3);
  margin-bottom: var(--space-6);
}

.result-score {
  margin-bottom: var(--space-6);
}

.result-score__value {
  font-size: var(--font-size-5xl);
  font-weight: var(--font-weight-bold);
  color: var(--color-primary);
}

.result-score__label {
  font-size: var(--font-size-sm);
  color: var(--color-text-secondary);
  margin-top: var(--space-2);
}

.result-stats {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--space-4);
}

.result-stat {
  background: var(--color-bg-primary);
  padding: var(--space-3);
  border-radius: var(--radius-3);
}

.result-stat__label {
  display: block;
  font-size: var(--font-size-sm);
  color: var(--color-text-secondary);
  margin-bottom: var(--space-1);
}

.result-stat__value {
  font-size: var(--font-size-2xl);
  font-weight: var(--font-weight-bold);
}

.result-stat__value.correct {
  color: var(--color-success);
}

.result-stat__value.incorrect {
  color: var(--color-error);
}

.result-classification {
  font-size: var(--font-size-xl);
  font-weight: var(--font-weight-semibold);
  color: var(--color-primary);
  margin-bottom: var(--space-6);
  padding: var(--space-4);
  background: rgba(109, 213, 231, 0.1);
  border-radius: var(--radius-3);
}

.result-review-summary {
  background: var(--color-bg-secondary);
  border-radius: var(--radius-3);
  margin-bottom: var(--space-6);
  padding: var(--space-5);
}

.result-review-summary h3 {
  color: var(--color-text-primary);
  font-size: var(--font-size-lg);
  margin-bottom: var(--space-2);
}

.result-review-summary__stats {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-2) var(--space-5);
  justify-content: center;
  list-style-position: inside;
  margin-top: var(--space-3);
}

.result-reward {
  background: linear-gradient(135deg, rgba(155, 89, 182, 0.1), rgba(39, 174, 96, 0.1));
  padding: var(--space-6);
  border-radius: var(--radius-3);
  border: 2px solid var(--color-accent);
  margin-bottom: var(--space-6);
}

.result-reward h3 {
  color: var(--color-accent);
  margin-bottom: var(--space-4);
  font-size: var(--font-size-lg);
}

.reward-content {
  display: flex;
  gap: var(--space-6);
  justify-content: center;
}

.result-actions {
  display: flex;
  flex-direction: column;
  gap: var(--space-3);
  margin-top: var(--space-6);
}

.result-actions .btn {
  width: 100%;
}

.btn-success {
  background: var(--color-success);
}

.btn-success:hover {
  background: #219053;
}

@media (min-width: 768px) {
  .lessons-grid {
    grid-template-columns: repeat(auto-fill, minmax(320px, 1fr));
  }

  .exercise-options {
    grid-template-columns: 1fr 1fr;
  }

  .vocabulary-navigation {
    justify-content: space-between;
  }

  .phrases-navigation {
    justify-content: space-between;
  }

  .result-stats {
    grid-template-columns: 1fr 1fr 1fr;
  }
}

@media (max-width: 480px) {
  .activity-mistake-review,
  .activity-result {
    padding-inline: var(--space-3);
  }

  .activity-mistake-review .exercise-wrapper,
  .result-card {
    padding: var(--space-5);
  }

  .result-review-summary__stats {
    align-items: center;
    flex-direction: column;
  }
}

@keyframes slideIn {
  from {
    opacity: 0;
    transform: translateY(10px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

@keyframes bounce {
  0%, 100% {
    transform: scale(1);
  }
  50% {
    transform: scale(1.1);
  }
}

/* NOTE (Fase 8 Parte 2): a speculative, zero-consumer ".lesson-card"
   block used to live here (added in the previous unofficial "Parte 2"
   pass). It duplicated the class name already used by the real,
   working lesson-card markup at the top of this file
   (js/pages/city.js createLessonCard(), lines 74-169 above) with an
   incompatible structure (__icon/__body vs the real __header/__number/
   __objective/__duration/__reward) and different values for the same
   selectors (.lesson-card, .lesson-card--completed, .lesson-card--locked,
   .lesson-card__title, .lesson-card__meta, .lesson-card__status) —
   because it appeared later in the cascade, it silently overrode parts
   of the real lesson cards actually rendered in Ciudad. Removed after
   the Paso 1 inventory of this Parte 2 caught the collision; the real
   implementation above was migrated to tokens instead (see below). */