/* Immersive Reader Studio — EduWonderLab / The Language Page
   A research-backed reading environment for multilingual learners.
   Uses tokens from ds.css. High contrast, WCAG 2.2 AA compliant. */

.reader-studio {
  display: flex;
  flex-direction: column;
  gap: var(--s-5);
  max-width: 58rem;
  margin: 0 auto;
  padding: var(--s-3) 0 var(--s-7);
}

.reader-header {
  display: flex;
  flex-direction: column;
  gap: var(--s-4);
  padding-bottom: var(--s-3);
  border-bottom: 2px solid var(--line);
}

.reader-kicker {
  margin: 0 0 0.25rem;
  color: var(--reading-ink, #2a4386);
  font-size: 0.85rem;
  font-weight: 700;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

.reader-header h1 {
  margin: 0;
  font-family: var(--font-display);
  font-size: clamp(1.8rem, 4vw, 2.4rem);
  color: var(--ink);
  line-height: 1.15;
}

.reader-lead {
  margin: 0.35rem 0 0;
  color: var(--ink-2);
  font-size: 1.05rem;
  max-width: 52ch;
  line-height: 1.5;
}

/* Tabs */
.reader-tabs {
  display: flex;
  gap: 0.5rem;
  border-bottom: 1px solid var(--line);
  padding-bottom: 0.25rem;
  overflow-x: auto;
}

.reader-tab {
  display: inline-flex;
  align-items: center;
  gap: 0.45rem;
  min-height: 2.75rem;
  padding: 0.45rem 1rem;
  border: 0;
  border-bottom: 3px solid transparent;
  border-radius: var(--radius-sm) var(--radius-sm) 0 0;
  background: transparent;
  color: var(--ink-2);
  font: 600 0.95rem/1 var(--font);
  cursor: pointer;
  transition: all 0.15s ease;
}

.reader-tab:hover {
  background: var(--surface-2);
  color: var(--ink);
}

.reader-tab.active {
  border-bottom-color: var(--reading-ink, #2a4386);
  color: var(--reading-ink, #2a4386);
  background: var(--surface-2);
  font-weight: 700;
}

.badge {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-width: 1.25rem;
  height: 1.25rem;
  padding: 0 0.35rem;
  border-radius: 999px;
  background: var(--line);
  color: var(--ink);
  font-size: 0.75rem;
  font-weight: 700;
}

.badge-due {
  background: var(--brand);
  color: #fff;
}

/* Toolbar */
.reader-toolbar {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 0.75rem var(--s-4);
  padding: var(--s-3) var(--s-4);
  background: var(--surface);
  border: 1.5px solid var(--line);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
}

.toolbar-group {
  display: flex;
  align-items: center;
  gap: 0.4rem;
}

.toolbar-label {
  font-size: 0.85rem;
  font-weight: 600;
  color: var(--ink-3);
  margin-right: 0.2rem;
}

.playback-btn {
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
}

.rehearse-btn.active-rehearse {
  background: var(--wrong-soft);
  border-color: var(--wrong);
  color: var(--wrong);
  animation: pulse-red 1.5s infinite;
}

@keyframes pulse-red {
  0%, 100% { box-shadow: 0 0 0 0 rgba(168, 40, 29, 0.4); }
  50% { box-shadow: 0 0 0 6px rgba(168, 40, 29, 0); }
}

.chip {
  padding: 0.3rem 0.65rem;
  border: 1px solid var(--line-strong);
  border-radius: 999px;
  background: var(--surface);
  color: var(--ink);
  font-size: 0.85rem;
  cursor: pointer;
}

.chip.active-chip {
  background: var(--brand);
  border-color: var(--brand);
  color: #fff;
  font-weight: 700;
}

.toggle-pill {
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
  padding: 0.35rem 0.65rem;
  border: 1.5px solid var(--line);
  border-radius: 999px;
  background: var(--surface-2);
  font-size: 0.85rem;
  font-weight: 600;
  cursor: pointer;
  user-select: none;
}

.toggle-pill input {
  accent-color: var(--reading-ink, #2a4386);
}

.toggle-pill.active-toggle {
  border-color: var(--reading-ink, #2a4386);
  background: var(--reading-soft, #eceef8);
}

/* Sample Bar */
.reader-sample-bar {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 0.5rem;
  margin-top: -0.25rem;
}

.sample-prompt {
  font-size: 0.85rem;
  font-weight: 700;
  color: var(--ink-3);
}

.sample-chip {
  padding: 0.3rem 0.8rem;
  border: 1px solid var(--line);
  border-radius: 999px;
  background: var(--surface);
  color: var(--ink-2);
  font-size: 0.85rem;
  cursor: pointer;
  transition: all 0.15s ease;
}

.sample-chip:hover {
  background: var(--surface-2);
  color: var(--ink);
}

.sample-chip.current-sample {
  border-color: var(--reading-ink, #2a4386);
  background: var(--reading-soft, #eceef8);
  color: var(--reading-ink, #2a4386);
  font-weight: 700;
}

/* Paste Drawer */
.reader-paste-drawer {
  display: flex;
  flex-direction: column;
  gap: var(--s-3);
  padding: var(--s-4);
  background: var(--surface-2);
  border: 1.5px solid var(--line-strong);
  border-radius: var(--radius);
}

.reader-paste-drawer textarea {
  width: 100%;
  padding: var(--s-3);
  border: 1px solid var(--line-strong);
  border-radius: var(--radius-sm);
  background: var(--surface);
  font: 1rem/1.5 var(--font);
  color: var(--ink);
}

.drawer-actions {
  display: flex;
  gap: var(--s-2);
}

/* Reading Surface */
.reader-surface {
  padding: clamp(var(--s-4), 5vw, var(--s-6));
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  min-height: 20rem;
  font-family: var(--font);
  font-size: calc(1.35rem * var(--lab-scale, 1));
  line-height: 2.1;
  color: var(--ink);
}

.reader-paragraph {
  margin-bottom: 1.75em;
}

.reader-sentence {
  display: inline;
  transition: opacity 0.25s ease, background-color 0.25s ease;
  padding: 0.15em 0;
  border-radius: 4px;
}

/* Spotlight Mode: dims sentences when another is active */
.has-spotlight .reader-sentence {
  opacity: 0.65;
}

.has-spotlight .reader-sentence.is-focused-sentence {
  opacity: 1;
  background-color: rgb(46 74 148 / 9%);
  box-shadow: 0 0 0 3px rgb(46 74 148 / 9%);
}

/* Words */
.reader-word {
  display: inline;
  padding: 0.05em 0.15em;
  margin: 0 -0.05em;
  border: 0;
  border-radius: 4px;
  background: transparent;
  color: inherit;
  font: inherit;
  text-decoration: none;
  cursor: pointer;
  transition: all 0.12s ease;
}

.reader-word:hover {
  background: var(--reading-soft, #eceef8);
  color: var(--reading-ink, #2a4386);
  outline: 1px dashed var(--reading-ink, #2a4386);
}

.reader-word.is-spoken-word {
  background: #fde047 !important;
  color: #111a3b !important;
  font-weight: 700;
  box-shadow: 0 0 0 2px #eab308;
}

/* Dictation states */
.reader-word.spoken-read {
  background: var(--right-soft, #e7f1ea);
  color: var(--right, #276152);
  border-bottom: 2px solid var(--right);
}

.reader-word.spoken-retry {
  background: var(--hint-soft, #fbf0e0);
  color: var(--hint, #7f4314);
  border-bottom: 2px dashed var(--hint);
}

/* Phrasing Chunks */
.has-chunks .chunk-divider {
  display: inline-block;
  margin: 0 0.45em;
  color: var(--reading-ink, #2a4386);
  font-weight: 700;
  opacity: 0.65;
}

.chunk-divider {
  display: none;
}

/* Dictation Banner */
.dictation-banner {
  padding: var(--s-3) var(--s-4);
  border-radius: var(--radius);
  background: var(--surface-2);
  border-left: 5px solid var(--right);
  display: flex;
  flex-direction: column;
  gap: var(--s-2);
}

.dictation-stats p {
  margin: 0.2rem 0 0;
  font-size: 0.9rem;
  color: var(--ink-2);
}

.dictation-practice-words {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 0.4rem;
  font-size: 0.9rem;
}

.retry-chip {
  background: var(--hint-soft);
  border-color: var(--hint);
  color: var(--hint);
  font-weight: 600;
}

/* Word Inspector Card & Modal */
.word-inspector-overlay {
  position: fixed;
  inset: 0;
  z-index: 950;
  display: grid;
  place-items: center;
  padding: var(--s-4);
  background: rgb(8 14 37 / 50%);
  backdrop-filter: blur(4px);
}

.word-inspector-card {
  width: min(28rem, 100%);
  padding: var(--s-5);
  border-radius: var(--radius);
  background: var(--surface);
  color: var(--ink);
  box-shadow: var(--shadow-float);
  display: flex;
  flex-direction: column;
  gap: var(--s-4);
}

.inspector-header {
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
}

.inspector-word-group h2 {
  margin: 0;
  font-family: var(--font-display);
  font-size: 1.8rem;
  line-height: 1.1;
}

.part-of-speech {
  display: inline-block;
  margin-top: 0.2rem;
  font-size: 0.82rem;
  font-style: italic;
  color: var(--ink-3);
}

.btn-close-inspector {
  display: grid;
  place-items: center;
  width: 2.5rem;
  height: 2.5rem;
  border: 1px solid var(--line-strong);
  border-radius: 50%;
  background: var(--surface-2);
  color: var(--ink);
  cursor: pointer;
}

.inspector-pronounce {
  display: flex;
  align-items: center;
  gap: var(--s-3);
}

.syllables-count {
  font-size: 0.9rem;
  color: var(--ink-3);
  font-weight: 600;
}

.inspector-definitions {
  display: flex;
  flex-direction: column;
  gap: var(--s-3);
}

.def-block {
  padding: var(--s-3);
  border-radius: var(--radius-sm);
  background: var(--surface-2);
}

.def-label {
  display: block;
  font-size: 0.8rem;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  color: var(--ink-3);
  margin-bottom: 0.2rem;
}

.def-block p {
  margin: 0;
  font-size: 1rem;
  line-height: 1.45;
}

.cognate-badge {
  padding: var(--s-2) var(--s-3);
  border-radius: var(--radius-sm);
  font-size: 0.88rem;
  font-weight: 600;
}

.cog-true {
  background: var(--right-soft);
  color: var(--right);
}

.cog-false {
  background: var(--wrong-soft);
  color: var(--wrong);
}

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

/* Word Bank & Flashcards */
.wordbank-section {
  display: flex;
  flex-direction: column;
  gap: var(--s-5);
}

.flashcard-arena {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: var(--s-3);
  padding: var(--s-5);
  border-radius: var(--radius);
  background: var(--surface);
  border: 1.5px solid var(--line);
  box-shadow: var(--shadow);
}

.flashcard-kicker {
  margin: 0;
  font-size: 0.85rem;
  font-weight: 700;
  color: var(--ink-3);
  text-transform: uppercase;
}

.flashcard-card {
  width: min(30rem, 100%);
  min-height: 14rem;
  padding: var(--s-5);
  border: 2px solid var(--line-strong);
  border-radius: var(--r-lg);
  background: var(--surface-2);
  display: grid;
  place-items: center;
  text-align: center;
  cursor: pointer;
  transition: transform 0.2s ease, box-shadow 0.2s ease;
}

.flashcard-card:hover {
  box-shadow: var(--shadow-lift);
}

.flashcard-word {
  margin: 0.5rem 0;
  font-family: var(--font-display);
  font-size: 2.2rem;
  color: var(--ink);
}

.flashcard-box-tag {
  display: inline-block;
  padding: 0.2rem 0.5rem;
  border-radius: 999px;
  background: var(--line);
  font-size: 0.75rem;
  font-weight: 700;
}

.flashcard-hint {
  margin: 0.5rem 0 1rem;
  font-size: 0.9rem;
  color: var(--ink-3);
}

.flashcard-back {
  display: none;
  text-align: left;
}

.flashcard-card.flipped .flashcard-front {
  display: none;
}

.flashcard-card.flipped .flashcard-back {
  display: block;
}

.flashcard-controls {
  display: flex;
  gap: var(--s-3);
  width: min(30rem, 100%);
}

.flashcard-controls .btn {
  flex: 1;
}

.saved-words-list {
  display: flex;
  flex-direction: column;
  gap: 0.4rem;
  padding: 0;
  margin: var(--s-3) 0 0;
  list-style: none;
}

.saved-word-row {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: var(--s-3) var(--s-4);
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: var(--radius-sm);
}

.sw-main strong {
  font-size: 1.05rem;
}

.sw-es {
  color: var(--reading-ink);
  font-weight: 600;
  margin-left: 0.4rem;
}

.sw-def {
  color: var(--ink-2);
  margin-left: 0.5rem;
}

.sw-meta {
  display: flex;
  align-items: center;
  gap: 0.4rem;
}

.box-badge {
  font-size: 0.8rem;
  font-weight: 700;
  padding: 0.2rem 0.5rem;
  background: var(--surface-2);
  border-radius: 6px;
  color: var(--ink-3);
}

.btn-icon {
  display: grid;
  place-items: center;
  width: 2.25rem;
  height: 2.25rem;
  border: 0;
  background: transparent;
  color: var(--ink-2);
  cursor: pointer;
  border-radius: 50%;
}

.btn-icon:hover {
  background: var(--surface-2);
  color: var(--ink);
}

.delete-word:hover {
  color: var(--wrong);
}

/* Insights Tab */
.insights-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(13rem, 1fr));
  gap: var(--s-4);
  margin: var(--s-4) 0;
}

.stat-card {
  padding: var(--s-4);
  border-radius: var(--radius);
  background: var(--surface);
  border: 1.5px solid var(--line);
  box-shadow: var(--shadow);
  display: flex;
  flex-direction: column;
  gap: 0.25rem;
}

.stat-num {
  font-family: var(--font-display);
  font-size: 2.4rem;
  color: var(--reading-ink, #2a4386);
  font-weight: 700;
  line-height: 1;
}

.stat-label {
  font-size: 0.92rem;
  color: var(--ink-2);
  font-weight: 600;
}

.academic-tag-cloud {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
  margin-top: var(--s-3);
}

.academic-chip {
  padding: 0.4rem 0.8rem;
  border: 1px solid var(--line-strong);
  border-radius: var(--radius-sm);
  background: var(--surface-2);
  display: flex;
  flex-direction: column;
  align-items: flex-start;
  gap: 0.1rem;
  cursor: pointer;
}

.academic-chip:hover {
  background: var(--reading-soft);
  border-color: var(--reading-ink);
}

@media (max-width: 640px) {
  .reader-toolbar {
    flex-direction: column;
    align-items: stretch;
  }
  .toolbar-group {
    justify-content: space-between;
  }
  .flashcard-controls {
    flex-direction: column;
  }
}