/* =============================================================================
   Kreyo Lingo Audio Library — Styles
   Version 15.0
   Organised into logical sections:
     1. CSS Custom Properties (design tokens)
     2. Paywall
     3. Library Shell (levels, categories)
     4. Progress Bar (inline + dashboard)
     5. Content Tabs
     6. Flashcards
     7. Sentences
     8. Conversations & Captions
     9. Quizzes
    10. Live Recorder
    11. Modal (evaluation)
    12. Dashboard
    13. Responsive overrides
============================================================================= */

/* ── 1. Design Tokens ───────────────────────────────────────────────────────── */
:root {
  --kl-primary:       #5A2E80;
  --kl-primary-dark:  #452166;
  --kl-primary-light: #f0e6fb;
  --kl-accent:        #1a428a;
  --kl-success:       #28a745;
  --kl-warning:       #ffaa00;
  --kl-danger:        #ff4d4d;
  --kl-text:          #333333;
  --kl-text-muted:    #666666;
  --kl-border:        #eaeaea;
  --kl-bg:            #ffffff;
  --kl-bg-alt:        #f9f9fb;
  --kl-radius:        12px;
  --kl-shadow:        0 4px 16px rgba(0, 0, 0, 0.07);
  --kl-transition:    0.25s ease;
}

/* ── 2. Paywall ─────────────────────────────────────────────────────────────── */
.kl-paywall {
  padding: 60px 20px;
  text-align: center;
}
.kl-paywall-inner {
  max-width: 480px;
  margin: 0 auto;
  background: var(--kl-bg);
  border: 1px solid var(--kl-border);
  border-radius: var(--kl-radius);
  padding: 40px 30px;
  box-shadow: var(--kl-shadow);
}
.kl-paywall-lock { font-size: 48px; display: block; margin-bottom: 16px; }
.kl-paywall-inner h2 { color: var(--kl-accent); margin: 0 0 12px; }
.kl-paywall-inner p  { color: var(--kl-text-muted); line-height: 1.6; }
.kl-paywall-btn {
  display: inline-block;
  margin-top: 24px;
  padding: 14px 32px;
  background: var(--kl-primary);
  color: #fff;
  border-radius: 30px;
  text-decoration: none;
  font-weight: 700;
  font-size: 16px;
  transition: background var(--kl-transition);
}
.kl-paywall-btn:hover { background: var(--kl-primary-dark); color: #fff; }

/* ── 3. Library Shell ───────────────────────────────────────────────────────── */
.kl-library { font-family: inherit; color: var(--kl-text); }

/* Level tabs — horizontal pill row */
.kl-level-tabs {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  justify-content: center;
  margin-bottom: 28px;
}
.kl-level-tab {
  padding: 10px 24px;
  border: 2px solid var(--kl-primary);
  border-radius: 30px;
  background: transparent;
  color: var(--kl-primary);
  font-weight: 700;
  font-size: 15px;
  cursor: pointer;
  transition: background var(--kl-transition), color var(--kl-transition);
}
.kl-level-tab:hover,
.kl-level-tab.active {
  background: var(--kl-primary);
  color: #fff;
}

/* Category panel — grid of clickable cards */
.kl-category-panel {
  margin-bottom: 28px;
}
.kl-select-prompt {
  text-align: center;
  color: var(--kl-text-muted);
  padding: 30px;
}
.kl-cat-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(180px, 1fr));
  gap: 14px;
}
.kl-cat-card {
  padding: 18px 14px;
  background: var(--kl-bg);
  border: 2px solid var(--kl-border);
  border-radius: var(--kl-radius);
  text-align: center;
  cursor: pointer;
  transition: border-color var(--kl-transition), box-shadow var(--kl-transition);
  font-weight: 600;
  font-size: 14px;
  color: var(--kl-text);
  position: relative;
}
.kl-cat-card:hover {
  border-color: var(--kl-primary);
  box-shadow: 0 4px 12px rgba(90, 46, 128, 0.15);
}
.kl-cat-card.active {
  border-color: var(--kl-primary);
  background: var(--kl-primary-light);
  color: var(--kl-primary-dark);
}
/* Small "completed" badge on category card */
.kl-cat-badge {
  position: absolute;
  top: 8px;
  right: 8px;
  font-size: 14px;
}

/* ── 4. Inline Progress Bar ─────────────────────────────────────────────────── */
.kl-progress-bar-wrap {
  background: var(--kl-bg-alt);
  border: 1px solid var(--kl-border);
  border-radius: var(--kl-radius);
  padding: 16px 20px;
  margin-bottom: 24px;
}
.kl-progress-heading {
  font-weight: 700;
  color: var(--kl-accent);
  margin: 0 0 14px;
  font-size: 15px;
}
.kl-prog-row {
  display: flex;
  align-items: center;
  gap: 10px;
  margin-bottom: 10px;
  font-size: 14px;
}
.kl-prog-label { width: 120px; flex-shrink: 0; color: var(--kl-text-muted); }
.kl-prog-track {
  flex: 1;
  height: 10px;
  background: var(--kl-border);
  border-radius: 999px;
  overflow: hidden;
}
.kl-prog-fill {
  height: 100%;
  background: var(--kl-primary);
  border-radius: 999px;
  transition: width 0.6s ease;
}
.kl-prog-pct { width: 38px; text-align: right; font-weight: 700; font-size: 13px; }
.kl-prog-status {
  margin-top: 8px;
  font-size: 14px;
  font-weight: 700;
  color: var(--kl-success);
}

/* ── 5. Content Tabs ────────────────────────────────────────────────────────── */
.kl-content-area { margin-top: 10px; }
.kl-content-tabs-nav {
  display: flex;
  gap: 8px;
  border-bottom: 2px solid var(--kl-border);
  margin-bottom: 24px;
  flex-wrap: wrap;
}
.kl-content-tab-btn {
  padding: 10px 20px;
  border: none;
  background: transparent;
  font-weight: 600;
  font-size: 15px;
  cursor: pointer;
  border-bottom: 3px solid transparent;
  margin-bottom: -2px;
  color: var(--kl-text-muted);
  transition: color var(--kl-transition), border-color var(--kl-transition);
}
.kl-content-tab-btn:hover  { color: var(--kl-primary); }
.kl-content-tab-btn.active {
  color: var(--kl-primary);
  border-bottom-color: var(--kl-primary);
}
.kl-content-tab-pane { display: none; animation: klFadeIn 0.3s ease; }
.kl-content-tab-pane.active { display: block; }

@keyframes klFadeIn {
  from { opacity: 0; transform: translateY(8px); }
  to   { opacity: 1; transform: translateY(0); }
}

/* ── 6. Flashcards ──────────────────────────────────────────────────────────── */
.kl-fc-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(220px, 1fr));
  gap: 20px;
}
.kl-fc-card {
  background: var(--kl-bg);
  border: 1px solid var(--kl-border);
  border-radius: var(--kl-radius);
  overflow: hidden;
  box-shadow: var(--kl-shadow);
  display: flex;
  flex-direction: column;
  transition: transform var(--kl-transition);
}
.kl-fc-card:hover { transform: translateY(-4px); }
.kl-fc-img {
  width: 100%;
  height: 180px;
  object-fit: cover;
  display: block;
  background: var(--kl-bg-alt);
}
.kl-fc-body {
  padding: 14px 14px 18px;
  display: flex;
  flex-direction: column;
  align-items: center;
  text-align: center;
  flex: 1;
}
.kl-fc-creole  { font-size: 22px; font-weight: 800; color: var(--kl-accent); margin: 0 0 4px; }
.kl-fc-english { font-size: 15px; color: var(--kl-text-muted); margin: 0 0 14px; }
.kl-audio-btn {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 10px 18px;
  background: var(--kl-primary);
  color: #fff;
  border: none;
  border-radius: 8px;
  cursor: pointer;
  font-weight: 600;
  font-size: 14px;
  transition: background var(--kl-transition);
  width: 100%;
  justify-content: center;
}
.kl-audio-btn:hover { background: var(--kl-primary-dark); }

/* ── 7. Sentences ───────────────────────────────────────────────────────────── */
.kl-sentence-list { display: flex; flex-direction: column; gap: 16px; }
.kl-sentence-item {
  background: var(--kl-bg);
  border: 1px solid var(--kl-border);
  border-left: 5px solid var(--kl-primary);
  border-radius: var(--kl-radius);
  padding: 18px 20px;
  box-shadow: var(--kl-shadow);
}
.kl-sentence-creole  { font-size: 18px; font-weight: 700; color: var(--kl-accent); margin: 0 0 4px; }
.kl-sentence-english { font-size: 15px; color: var(--kl-text-muted); margin: 0 0 12px; }

/* ── 8. Conversations & Captions ────────────────────────────────────────────── */
.kl-conv-list { display: flex; flex-direction: column; gap: 24px; }
.kl-conv-card {
  background: var(--kl-bg);
  border: 1px solid var(--kl-border);
  border-radius: var(--kl-radius);
  padding: 22px;
  box-shadow: var(--kl-shadow);
}
.kl-conv-title { color: var(--kl-accent); font-weight: 800; font-size: 18px; margin: 0 0 14px; }
.kl-conv-audio { width: 100%; margin-bottom: 16px; border-radius: 8px; }

/* Captions container */
.kl-captions-box {
  background: var(--kl-bg-alt);
  border-radius: 8px;
  padding: 14px;
  min-height: 80px;
  font-size: 16px;
  line-height: 1.7;
  border-left: 4px solid var(--kl-primary);
}
.kl-caption-line {
  display: none; /* JS shows lines based on currentTime */
  padding: 4px 0;
  transition: opacity 0.3s;
}
.kl-caption-line.active {
  display: block;
  color: var(--kl-primary-dark);
  font-weight: 600;
}
.kl-caption-speaker {
  font-size: 12px;
  font-weight: 800;
  text-transform: uppercase;
  color: var(--kl-primary);
  margin-right: 6px;
}

/* Transcript toggle */
.kl-transcript-toggle {
  background: none;
  border: 1px solid var(--kl-border);
  border-radius: 8px;
  padding: 8px 16px;
  cursor: pointer;
  margin-top: 12px;
  font-size: 13px;
  color: var(--kl-text-muted);
  transition: background var(--kl-transition);
}
.kl-transcript-toggle:hover { background: var(--kl-bg-alt); }
.kl-transcript-body {
  display: none;
  margin-top: 10px;
  white-space: pre-line;
  font-size: 14px;
  color: var(--kl-text-muted);
  background: var(--kl-bg-alt);
  border-radius: 8px;
  padding: 14px;
  line-height: 1.7;
}

/* ── 9. Quizzes ─────────────────────────────────────────────────────────────── */
.kl-quiz-list { display: flex; flex-direction: column; gap: 16px; }
.kl-quiz-card {
  background: var(--kl-bg);
  border: 1px solid var(--kl-border);
  border-radius: var(--kl-radius);
  padding: 20px;
  box-shadow: var(--kl-shadow);
}
.kl-quiz-card-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 14px;
}
.kl-quiz-title  { font-weight: 700; font-size: 16px; color: var(--kl-accent); }
.kl-quiz-type-badge {
  font-size: 12px;
  background: var(--kl-primary-light);
  color: var(--kl-primary);
  padding: 3px 10px;
  border-radius: 999px;
  font-weight: 600;
}
.kl-start-quiz-btn {
  padding: 10px 22px;
  background: var(--kl-primary);
  color: #fff;
  border: none;
  border-radius: 8px;
  cursor: pointer;
  font-weight: 600;
  font-size: 15px;
  transition: background var(--kl-transition);
}
.kl-start-quiz-btn:hover { background: var(--kl-primary-dark); }

/* Quiz modal (question-by-question overlay) */
.kl-quiz-overlay {
  display: none;
  position: fixed;
  inset: 0;
  background: rgba(0, 0, 0, 0.65);
  z-index: 99990;
  align-items: center;
  justify-content: center;
  backdrop-filter: blur(4px);
}
.kl-quiz-overlay.open { display: flex; }
.kl-quiz-modal {
  background: var(--kl-bg);
  border-radius: 16px;
  padding: 32px 28px;
  max-width: 520px;
  width: 92%;
  max-height: 90vh;
  overflow-y: auto;
  box-shadow: 0 20px 60px rgba(0,0,0,0.25);
  animation: klPopIn 0.3s ease;
}
@keyframes klPopIn {
  from { transform: scale(0.88); opacity: 0; }
  to   { transform: scale(1);    opacity: 1; }
}
.kl-quiz-modal-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 20px;
}
.kl-quiz-modal-title { font-size: 18px; font-weight: 800; color: var(--kl-accent); }
.kl-quiz-close-btn {
  background: none;
  border: none;
  font-size: 22px;
  cursor: pointer;
  color: var(--kl-text-muted);
  line-height: 1;
}
.kl-quiz-progress-text { font-size: 13px; color: var(--kl-text-muted); margin-bottom: 18px; }

/* Question rendering */
.kl-question-text { font-size: 17px; font-weight: 600; color: var(--kl-text); margin-bottom: 16px; }
.kl-options { display: flex; flex-direction: column; gap: 10px; }
.kl-option-btn {
  padding: 12px 16px;
  border: 2px solid var(--kl-border);
  border-radius: 10px;
  background: var(--kl-bg);
  cursor: pointer;
  text-align: left;
  font-size: 15px;
  font-weight: 500;
  transition: border-color var(--kl-transition), background var(--kl-transition);
  color: var(--kl-text);
}
.kl-option-btn:hover:not(:disabled) {
  border-color: var(--kl-primary);
  background: var(--kl-primary-light);
}
.kl-option-btn.selected  { border-color: var(--kl-primary); background: var(--kl-primary-light); }
.kl-option-btn.correct   { border-color: var(--kl-success);  background: #e6f9ed; color: var(--kl-success); }
.kl-option-btn.incorrect { border-color: var(--kl-danger);   background: #ffe6e6; color: var(--kl-danger);  }
.kl-option-btn:disabled  { cursor: default; }

/* Matching quiz layout */
.kl-match-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 10px;
}
.kl-match-col { display: flex; flex-direction: column; gap: 8px; }
.kl-match-item {
  padding: 10px 14px;
  border: 2px solid var(--kl-border);
  border-radius: 8px;
  background: var(--kl-bg);
  cursor: pointer;
  font-weight: 600;
  text-align: center;
  transition: border-color var(--kl-transition), background var(--kl-transition);
  user-select: none;
}
.kl-match-item.selected  { border-color: var(--kl-primary); background: var(--kl-primary-light); }
.kl-match-item.matched   { border-color: var(--kl-success);  background: #e6f9ed; cursor: default; }
.kl-match-item.wrong     { border-color: var(--kl-danger);   background: #ffe6e6; }

/* Quiz navigation */
.kl-quiz-nav {
  display: flex;
  justify-content: flex-end;
  margin-top: 22px;
}
.kl-quiz-next-btn {
  padding: 11px 28px;
  background: var(--kl-primary);
  color: #fff;
  border: none;
  border-radius: 8px;
  font-weight: 700;
  font-size: 15px;
  cursor: pointer;
  transition: background var(--kl-transition);
}
.kl-quiz-next-btn:hover { background: var(--kl-primary-dark); }

/* Results panel */
.kl-quiz-results { text-align: center; padding: 10px 0; }
.kl-quiz-score-circle {
  width: 110px;
  height: 110px;
  border-radius: 50%;
  background: var(--kl-primary-light);
  border: 4px solid var(--kl-primary);
  display: flex;
  align-items: center;
  justify-content: center;
  margin: 0 auto 20px;
  font-size: 32px;
  font-weight: 900;
  color: var(--kl-primary);
}
.kl-quiz-results h3 { color: var(--kl-accent); margin: 0 0 8px; }
.kl-quiz-results p  { color: var(--kl-text-muted); margin: 0 0 20px; }
.kl-quiz-retry-btn  {
  padding: 10px 24px;
  background: var(--kl-primary);
  color: #fff;
  border: none;
  border-radius: 8px;
  cursor: pointer;
  font-weight: 700;
  margin-right: 10px;
  transition: background var(--kl-transition);
}
.kl-quiz-retry-btn:hover { background: var(--kl-primary-dark); }

/* ── 10. Live Recorder ──────────────────────────────────────────────────────── */
.kl-recorder-wrap {
  background: var(--kl-bg-alt);
  border: 1px solid var(--kl-border);
  border-radius: var(--kl-radius);
  padding: 16px;
  margin-top: 14px;
}
.kl-rec-start-btn {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  width: 100%;
  padding: 12px;
  background: var(--kl-primary);
  color: #fff;
  border: none;
  border-radius: 8px;
  cursor: pointer;
  font-weight: 700;
  font-size: 16px;
  transition: background var(--kl-transition);
}
.kl-rec-start-btn:hover { background: var(--kl-primary-dark); }

.kl-rec-ui {
  display: none;
  flex-direction: column;
  align-items: center;
}
.kl-visualizer-wrap {
  width: 100%;
  height: 60px;
  background: #222;
  border-radius: 8px;
  overflow: hidden;
  position: relative;
  margin-bottom: 14px;
}
.kl-visualizer-canvas { width: 100%; height: 100%; display: block; }
.kl-rec-indicator {
  position: absolute;
  top: 8px;
  right: 10px;
  display: flex;
  align-items: center;
  gap: 5px;
  color: #fff;
  font-size: 12px;
  font-weight: 800;
  animation: klPulse 1.5s infinite;
}
.kl-rec-dot { width: 10px; height: 10px; background: red; border-radius: 50%; }

@keyframes klPulse {
  0%, 100% { opacity: 1; }
  50%       { opacity: 0.25; }
}

.kl-rec-controls {
  display: flex;
  gap: 10px;
  width: 100%;
}
.kl-rec-controls button {
  flex: 1;
  padding: 10px 6px;
  border: none;
  border-radius: 6px;
  cursor: pointer;
  font-weight: 700;
  font-size: 14px;
  transition: filter var(--kl-transition);
}
.kl-rec-controls button:hover { filter: brightness(0.9); }
.kl-discard-btn { background: var(--kl-danger);   color: #fff; }
.kl-pause-btn   { background: var(--kl-warning);  color: #fff; }
.kl-submit-btn  { background: var(--kl-success);  color: #fff; }

/* ── 11. Evaluation Modal ───────────────────────────────────────────────────── */
.kl-eval-overlay {
  display: none;
  position: fixed;
  inset: 0;
  background: rgba(0, 0, 0, 0.6);
  z-index: 99999;
  align-items: center;
  justify-content: center;
  backdrop-filter: blur(3px);
}
.kl-eval-overlay.open { display: flex; }
.kl-eval-modal {
  background: var(--kl-bg);
  border-radius: 16px;
  padding: 36px 24px;
  max-width: 320px;
  width: 90%;
  text-align: center;
  box-shadow: 0 12px 40px rgba(0,0,0,0.22);
  animation: klPopIn 0.3s ease;
}
.kl-eval-icon  { font-size: 52px; display: block; margin-bottom: 12px; }
.kl-eval-score { font-size: 34px; font-weight: 900; color: var(--kl-success); margin: 0 0 8px; }
.kl-eval-text  { color: var(--kl-text-muted); font-size: 16px; line-height: 1.5; margin: 0 0 24px; }
.kl-eval-close-btn {
  width: 100%;
  padding: 12px;
  background: var(--kl-primary);
  color: #fff;
  border: none;
  border-radius: 8px;
  font-weight: 700;
  font-size: 16px;
  cursor: pointer;
  transition: background var(--kl-transition);
}
.kl-eval-close-btn:hover { background: var(--kl-primary-dark); }

/* ── 12. Dashboard ──────────────────────────────────────────────────────────── */
.kl-dashboard { font-family: inherit; }
.kl-dashboard-heading { color: var(--kl-accent); font-size: 22px; margin-bottom: 24px; }
.kl-dash-level { margin-bottom: 36px; }
.kl-dash-level-title {
  font-size: 18px;
  font-weight: 800;
  color: var(--kl-primary);
  border-bottom: 2px solid var(--kl-primary-light);
  padding-bottom: 8px;
  margin-bottom: 16px;
}
.kl-dash-cat-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(260px, 1fr));
  gap: 16px;
}
.kl-dash-cat-card {
  background: var(--kl-bg);
  border: 1px solid var(--kl-border);
  border-radius: var(--kl-radius);
  padding: 20px;
  box-shadow: var(--kl-shadow);
}
.kl-dash-cat-card h4 { margin: 0 0 16px; color: var(--kl-accent); font-size: 16px; }
.kl-dash-row {
  display: flex;
  align-items: center;
  gap: 10px;
  margin-bottom: 10px;
  font-size: 13px;
}
.kl-dash-label    { width: 110px; flex-shrink: 0; color: var(--kl-text-muted); }
.kl-dash-bar-wrap { flex: 1; height: 8px; background: var(--kl-border); border-radius: 999px; overflow: hidden; }
.kl-dash-bar      { height: 100%; background: var(--kl-primary); border-radius: 999px; transition: width 0.6s ease; }
.kl-dash-pct      { width: 34px; text-align: right; font-weight: 700; }
.kl-dash-status   { margin: 14px 0 0; font-weight: 700; font-size: 14px; color: var(--kl-text-muted); }
.kl-status-done .kl-dash-status { color: var(--kl-success); }

/* ── 13. Responsive ─────────────────────────────────────────────────────────── */
@media (max-width: 600px) {
  .kl-fc-grid   { grid-template-columns: repeat(auto-fill, minmax(160px, 1fr)); }
  .kl-cat-grid  { grid-template-columns: repeat(auto-fill, minmax(140px, 1fr)); }
  .kl-match-grid { grid-template-columns: 1fr; }
  .kl-quiz-modal { padding: 22px 16px; }
  .kl-dash-cat-grid { grid-template-columns: 1fr; }
}

/* ── Breadcrumb Navigation ──────────────────────────────────────────────── */
#kl-breadcrumb {
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: 6px;
  padding: 10px 16px;
  background: var(--kl-bg-alt);
  border: 1px solid var(--kl-border);
  border-radius: var(--kl-radius);
  margin-bottom: 20px;
  font-size: 14px;
}

.kl-crumb {
  color: var(--kl-text-muted);
  font-weight: 500;
  transition: color var(--kl-transition);
}

/* Home and level crumbs are clickable — show pointer and highlight on hover */
.kl-crumb-home,
.kl-crumb-level {
  color: var(--kl-primary);
  cursor: pointer;
  text-decoration: underline;
  text-underline-offset: 3px;
}

.kl-crumb-home:hover,
.kl-crumb-level:hover {
  color: var(--kl-primary-dark);
}

/* The current page crumb — not clickable, full colour */
.kl-crumb-active {
  color: var(--kl-text);
  font-weight: 700;
  cursor: default;
  text-decoration: none;
}

.kl-crumb-sep {
  color: var(--kl-border);
  font-size: 16px;
  font-weight: 300;
  user-select: none;
}