/**
 * Magna AI - Language Learning Styles
 *
 * Lesson browser, progress dashboard, vocabulary cards.
 *
 * ★ PORTED from ConfidenceTalk `public/css/language-learning.css` (2026-10-01).
 *   Prefix-adapted `ct-` → `aisg-`. Class names verified against the classes
 *   ACTUALLY rendered by `core/class-language-learning.php` before writing —
 *   not copied blind.
 *
 * ★ THEME-CONFORMANT. The CT source hardcoded the DEFAULT gradient
 *   (`linear-gradient(135deg, #2c3e50, #34495e, #7f8c8d)`). Here it reads the
 *   theme token with a literal fallback, so a non-default theme is not
 *   overridden by a stale literal (CT lesson V33g: a derived value must never
 *   be a copied literal).
 *
 * @package AISG
 */

/* ===== Language Learning Card ===== */
.aisg-language-learning-card {
  background: var(--aisg-hf-bg-alt, linear-gradient(135deg, #2c3e50, #34495e, #7f8c8d));
  border: 1px solid rgba(255, 255, 255, 0.1);
  border-radius: 16px;
  padding: 20px;
}

/* ===== Accessibility ===== */
.aisg-learning-lesson-card:focus-visible,
.aisg-btn:focus-visible,
.aisg-learning-select:focus-visible {
  outline: 2px solid #CD853F;
  outline-offset: 2px;
}

.aisg-learning-lesson-card {
  /* cards are clickable — make them keyboard-focusable */
  outline: none;
}

@media (prefers-reduced-motion: reduce) {
  .aisg-learning-lesson-card {
    transition: none;
  }

  .aisg-learning-lesson-card:hover {
    transform: none;
    box-shadow: none;
  }

  .aisg-learning-vocab-card {
    transition: none;
  }
}

.aisg-language-learning-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 16px;
  padding-bottom: 12px;
  border-bottom: 1px solid rgba(255, 255, 255, 0.1);
  flex-wrap: wrap;
  gap: 8px;
}

.aisg-language-learning-stats {
  font-size: 12px;
  color: rgba(255, 255, 255, 0.6);
}

/* ===== Progress Overview ===== */
.aisg-learning-progress {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 12px;
  margin-bottom: 20px;
}

.aisg-learning-progress-item {
  text-align: center;
  padding: 16px 12px;
  background: rgba(255, 255, 255, 0.06);
  border-radius: 12px;
  border: 1px solid rgba(255, 255, 255, 0.08);
}

.aisg-learning-progress-value {
  display: block;
  font-size: 24px;
  font-weight: 700;
  color: #CD853F;
  line-height: 1.2;
  margin-bottom: 4px;
}

.aisg-learning-progress-label {
  display: block;
  font-size: 12px;
  color: rgba(255, 255, 255, 0.6);
  text-transform: uppercase;
  letter-spacing: 0.5px;
}

/* ===== Filters ===== */
.aisg-learning-filters {
  display: flex;
  gap: 10px;
  margin-bottom: 20px;
  flex-wrap: wrap;
  align-items: center;
}

.aisg-learning-select {
  padding: 8px 12px;
  border-radius: 8px;
  border: 1px solid rgba(255, 255, 255, 0.2);
  background: rgba(255, 255, 255, 0.05);
  color: #fff;
  font-size: 13px;
  min-width: 140px;
}

.aisg-learning-select option {
  background: #2c3e50;
  color: #fff;
}

/* ===== Lesson List ===== */
.aisg-learning-lessons {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
  gap: 14px;
}

.aisg-learning-lesson-card {
  background: rgba(255, 255, 255, 0.05);
  border: 1px solid rgba(255, 255, 255, 0.1);
  border-radius: 12px;
  padding: 16px;
  cursor: pointer;
  transition: all 0.2s ease;
}

.aisg-learning-lesson-card:hover {
  background: rgba(255, 255, 255, 0.09);
  transform: translateY(-2px);
  box-shadow: 0 8px 20px -6px rgba(0, 0, 0, 0.3);
}

.aisg-learning-lesson-card.aisg-learning-status-completed {
  border-left: 3px solid #27ae60;
}

.aisg-learning-lesson-card.aisg-learning-status-progress {
  border-left: 3px solid #f39c12;
}

.aisg-learning-lesson-header {
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
  gap: 8px;
  margin-bottom: 8px;
}

.aisg-learning-lesson-title {
  font-size: 15px;
  font-weight: 600;
  color: #fff;
  line-height: 1.3;
}

.aisg-learning-lesson-level {
  font-size: 11px;
  text-transform: uppercase;
  letter-spacing: 0.5px;
  padding: 2px 8px;
  border-radius: 999px;
  background: rgba(205, 133, 63, 0.15);
  color: #CD853F;
  white-space: nowrap;
}

.aisg-learning-lesson-desc {
  font-size: 13px;
  color: rgba(255, 255, 255, 0.6);
  line-height: 1.5;
  margin-bottom: 10px;
}

.aisg-learning-lesson-meta {
  display: flex;
  align-items: center;
  gap: 10px;
  font-size: 11px;
  color: rgba(255, 255, 255, 0.45);
}

.aisg-learning-lesson-score {
  color: #CD853F;
  font-weight: 600;
}

/* ===== Lesson Detail ===== */
.aisg-learning-detail {
  margin-bottom: 20px;
}

.aisg-learning-detail-header {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: 12px;
  margin-bottom: 16px;
}

.aisg-learning-detail-title-block h3 {
  margin: 0 0 8px;
  font-size: 20px;
  color: #fff;
}

.aisg-learning-detail-title-block .aisg-learning-lesson-level,
.aisg-learning-detail-title-block .aisg-learning-lesson-lang {
  display: inline-block;
  margin-right: 10px;
  margin-bottom: 4px;
}

.aisg-learning-lesson-lang {
  font-size: 12px;
  color: rgba(255, 255, 255, 0.5);
  background: rgba(255, 255, 255, 0.08);
  padding: 2px 8px;
  border-radius: 6px;
}

.aisg-learning-detail-section {
  margin-bottom: 20px;
  padding: 16px;
  background: rgba(255, 255, 255, 0.04);
  border-radius: 10px;
  border: 1px solid rgba(255, 255, 255, 0.06);
}

.aisg-learning-detail-section h4 {
  margin: 0 0 8px;
  font-size: 14px;
  color: #CD853F;
  font-weight: 600;
}

.aisg-learning-detail-section p {
  margin: 0;
  font-size: 14px;
  color: rgba(255, 255, 255, 0.8);
  line-height: 1.6;
}

.aisg-learning-detail-actions {
  display: flex;
  justify-content: center;
  margin-top: 24px;
  padding: 16px 0;
  border-top: 1px solid rgba(255, 255, 255, 0.08);
}

.aisg-learning-detail-actions .aisg-btn {
  padding: 12px 32px;
  font-size: 14px;
}

/* ===== Vocabulary Grid ===== */
.aisg-learning-vocab-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(200px, 1fr));
  gap: 10px;
}

.aisg-learning-vocab-card {
  background: rgba(255, 255, 255, 0.06);
  border: 1px solid rgba(255, 255, 255, 0.08);
  border-radius: 10px;
  padding: 12px;
  transition: all 0.2s ease;
}

.aisg-learning-vocab-card:hover {
  background: rgba(255, 255, 255, 0.09);
}

.aisg-learning-vocab-word {
  font-size: 16px;
  font-weight: 600;
  color: #fff;
  margin-bottom: 4px;
}

.aisg-learning-vocab-translation {
  font-size: 13px;
  color: rgba(255, 255, 255, 0.5);
  margin-bottom: 10px;
}

.aisg-learning-vocab-actions {
  display: flex;
  gap: 6px;
}

.aisg-btn-small {
  padding: 5px 10px;
  font-size: 11px;
  border-radius: 6px;
}

/* ===== Empty / Loading ===== */
.aisg-learning-empty {
  text-align: center;
  padding: 40px 20px;
  color: rgba(255, 255, 255, 0.5);
  font-size: 14px;
}

.aisg-loading {
  text-align: center;
  padding: 30px 20px;
  color: rgba(255, 255, 255, 0.5);
  font-size: 13px;
}

/* ===== Responsive ===== */
@media (max-width: 768px) {
  .aisg-learning-progress {
    grid-template-columns: repeat(2, 1fr);
    gap: 8px;
  }

  .aisg-learning-progress-item {
    padding: 12px 8px;
  }

  .aisg-learning-progress-value {
    font-size: 20px;
  }

  .aisg-learning-lessons {
    grid-template-columns: 1fr;
  }

  .aisg-learning-vocab-grid {
    grid-template-columns: 1fr;
  }

  .aisg-learning-filters {
    flex-direction: column;
    align-items: stretch;
  }

  .aisg-learning-select {
    width: 100%;
  }

  .aisg-learning-detail-header {
    flex-direction: column;
  }
}

@media (max-width: 480px) {
  .aisg-learning-progress {
    grid-template-columns: repeat(2, 1fr);
  }

  .aisg-learning-progress-value {
    font-size: 18px;
  }
}