/* ==========================================================================
   Reader — Story reading view styles
   ========================================================================== */

/* ---- Reader wrapper ---- */
.reader {
  background: var(--color-bg-reader);
  min-height: 100dvh;
}

.reader__header {
  text-align: center;
  padding: var(--space-2xl) 0 var(--space-lg);
  max-width: var(--max-width-reader);
  margin: 0 auto;
}

.reader__title {
  font-family: var(--font-heading);
  font-size: clamp(24px, 5vw, 36px);
  margin-bottom: var(--space-xs);
}

.reader__meta {
  font-size: 14px;
  color: var(--color-text-secondary);
  display: flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-sm);
}

.reader__controls {
  display: flex;
  align-items: center;
  gap: var(--space-md);
}

/* ---- Hero Banner (side-by-side: text left, illustration right) ---- */
.reader__hero-banner {
  max-width: var(--max-width, 960px);
  margin: 0 auto;
  padding: var(--space-2xl) var(--space-lg) var(--space-xl);
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--space-xl);
  align-items: center;
}

.reader__hero-text {
  display: flex;
  flex-direction: column;
  gap: var(--space-sm);
}

.reader__hero-text .level-badge {
  align-self: flex-start;
  font-size: 14px;
  font-weight: 600;
  letter-spacing: 0.01em;
}

.reader__hero-text .reader__title {
  margin-bottom: 0;
}

.reader__subtitle {
  font-family: var(--font-reading);
  font-size: clamp(16px, 3vw, 20px);
  color: var(--color-text-secondary);
  font-style: italic;
}

.reader__hero-text .reader__meta {
  justify-content: flex-start;
  margin-top: var(--space-sm);
}

.reader__hero-image {
  background: #F5EDDF;
  border-radius: var(--radius-lg);
  overflow: hidden;
  display: flex;
  align-items: center;
  justify-content: center;
  aspect-ratio: 1 / 1;
}

.reader__hero-image img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  display: block;
}

@media (max-width: 680px) {
  .reader__hero-banner {
    grid-template-columns: 1fr;
    text-align: center;
    padding: var(--space-xl) var(--space-md) var(--space-lg);
  }

  .reader__hero-text .level-badge {
    align-self: center;
  }

  .reader__hero-text .reader__meta {
    justify-content: center;
  }

  .reader__hero-image {
    max-width: 320px;
    margin: 0 auto;
    order: -1;
  }
}

/* ---- Two-column body grid (sentences + sidebar) ---- */
.reader__body {
  display: grid;
  grid-template-columns: 1fr 260px;
  gap: var(--space-xl);
  max-width: var(--max-width, 960px);
  margin: 0 auto;
  padding: 0 var(--space-md);
}

.reader__main {
  min-width: 0; /* prevent grid blowout */
}

/* ---- Sidebar ---- */
.reader__sidebar {
  position: sticky;
  top: 80px; /* topbar 56px + progress 3px + breathing room */
  align-self: start;
  display: flex;
  flex-direction: column;
  gap: var(--space-lg);
  padding: var(--space-md);
  background: var(--color-surface);
  border: 1px solid var(--color-border-light);
  border-radius: var(--radius-md);
  box-shadow: var(--shadow-sm);
}

.sidebar__section {
  display: flex;
  flex-direction: column;
  gap: var(--space-sm);
}

.sidebar__label {
  font-size: 11px;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  color: var(--color-text-light);
}

/* Sidebar — English toggle (reuse existing .en-toggle-btn styles) */
.reader__sidebar .en-toggle-btn {
  width: 100%;
  justify-content: center;
}

/* Sidebar — Text size pill group */
.sidebar__size {
  display: flex;
  align-items: center;
  gap: 1px;
  background: var(--color-border-light);
  border-radius: var(--radius-sm);
  padding: 2px;
}

.sidebar__size-btn {
  display: flex;
  align-items: center;
  justify-content: center;
  flex: 1;
  height: 30px;
  border-radius: 4px;
  font-weight: 600;
  color: var(--color-text-light);
  transition: all var(--transition-fast);
}

.sidebar__size-btn:hover {
  color: var(--color-text-secondary);
}

.sidebar__size-btn.active {
  background: var(--color-surface);
  color: var(--color-text);
  box-shadow: var(--shadow-sm);
}

.sidebar__size-btn[data-size="small"]  { font-size: 11px; }
.sidebar__size-btn[data-size="medium"] { font-size: 14px; }
.sidebar__size-btn[data-size="large"]  { font-size: 17px; }

/* Sidebar — Vocabulary */
.sidebar__vocab-list {
  display: flex;
  flex-direction: column;
}

.sidebar__vocab-item {
  display: flex;
  flex-direction: column;
  gap: 1px;
  padding: var(--space-xs) 0;
  border-bottom: 1px solid var(--color-border-light);
}

.sidebar__vocab-item:last-child {
  border-bottom: none;
}

.sidebar__vocab-es {
  font-family: var(--font-reading);
  font-weight: 600;
  font-size: 14px;
}

.sidebar__vocab-en {
  font-size: 12px;
  color: var(--color-text-secondary);
}

/* Sidebar — Story navigation */
.sidebar__nav {
  flex-direction: row;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-xs);
  padding-top: var(--space-sm);
  border-top: 1px solid var(--color-border-light);
}

.sidebar__nav-btn {
  font-size: 13px;
  font-weight: 500;
  color: var(--color-text-secondary);
  transition: color var(--transition-fast);
  white-space: nowrap;
}

.sidebar__nav-btn:hover {
  color: var(--color-text);
}

.sidebar__nav-counter {
  font-size: 12px;
  color: var(--color-text-light);
}

/* ---- Responsive: collapse sidebar on mobile ---- */
@media (max-width: 767px) {
  .reader__body {
    grid-template-columns: 1fr;
    gap: var(--space-md);
  }

  .reader__sidebar {
    position: static;
    order: -1; /* move above sentences on mobile */
  }
}

/* ---- English Toggle button ---- */
.en-toggle-btn {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 6px 14px;
  border-radius: var(--radius-pill);
  font-size: 13px;
  font-weight: 500;
  border: 1px solid var(--color-border);
  color: var(--color-text-secondary);
  background: var(--color-surface);
  transition: all var(--transition-fast);
  cursor: pointer;
}

.en-toggle-btn:hover {
  border-color: var(--color-text-light);
  color: var(--color-text);
}

.en-toggle-btn.active {
  border-color: var(--color-accent);
  color: var(--color-accent);
  background: var(--color-accent-light);
}

.en-toggle-btn__icon {
  flex-shrink: 0;
}

/* ---- Sentence blocks ---- */
.sentence-list {
  padding: 0 0 var(--space-2xl);
}

.sentence-block {
  margin-bottom: var(--gap);
  transition: background var(--transition-fast);
  border-radius: var(--radius-sm);
}

/* ---- Stacked mode (default) — English below Spanish ---- */
.sentence-block--stacked .sentence__en {
  margin-top: var(--space-xs);
}

/* ---- Parallel mode — side by side on desktop, stacked on mobile ---- */
@media (min-width: 768px) {
  .sentence-block--parallel {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--space-lg);
    align-items: baseline;
  }
}

@media (max-width: 767px) {
  .sentence-block--parallel .sentence__en {
    margin-top: var(--space-xs);
  }
}

.sentence__es-row {
  display: flex;
  align-items: flex-start;
  gap: var(--space-sm);
}

.sentence__es {
  font-family: var(--font-reading);
  font-size: var(--spanish-size);
  line-height: var(--spanish-lh);
  color: var(--color-text);
  flex: 1;
}

.sentence__speak {
  flex-shrink: 0;
  width: 28px;
  height: 28px;
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--color-text-light);
  opacity: 0;
  border-radius: var(--radius-sm);
  transition: opacity var(--transition-fast), background var(--transition-fast);
  margin-top: 2px;
}

.sentence-block:hover .sentence__speak {
  opacity: 0.5;
}

.sentence__speak:hover {
  opacity: 1 !important;
  background: var(--color-accent-light);
  color: var(--color-accent);
}

/* On touch devices, always show the button */
@media (hover: none) {
  .sentence__speak {
    opacity: 0.4;
  }
}

.sentence__en {
  font-family: var(--font-reading);
  font-size: var(--english-size);
  line-height: var(--english-lh);
  color: var(--color-text-secondary);
}

/* ---- Spanish-only mode ---- */
.sentence-block--spanish-only .sentence__en {
  max-height: 0;
  overflow: hidden;
  opacity: 0;
  margin-top: 0;
  transition: max-height 300ms var(--ease-out), opacity 200ms var(--ease-out), margin-top 200ms var(--ease-out);
}

.sentence-block--spanish-only.revealed .sentence__en {
  max-height: 200px;
  opacity: 1;
  margin-top: var(--space-sm);
}

.sentence-block--spanish-only .sentence__es {
  cursor: pointer;
  padding: var(--space-sm);
  margin: calc(-1 * var(--space-sm));
  border-radius: var(--radius-sm);
  transition: background var(--transition-fast);
}

.sentence-block--spanish-only .sentence__es:hover {
  background: rgba(0, 0, 0, 0.03);
}

.sentence-block--spanish-only .sentence__es::after {
  content: ' ↕';
  font-size: 12px;
  color: var(--color-text-light);
  opacity: 0;
  transition: opacity var(--transition-fast);
}

.sentence-block--spanish-only .sentence__es:hover::after {
  opacity: 1;
}

.sentence-block--spanish-only.revealed .sentence__es::after {
  display: none;
}

/* ---- Word spans (clickable) ---- */
.word-span {
  cursor: pointer;
  border-radius: 2px;
  padding: 0 1px;
  transition: background var(--transition-fast);
}

.word-span:hover {
  background: var(--color-accent-light);
}

.word-span.highlight-es {
  background: var(--color-accent-light);
  box-shadow: 0 2px 0 var(--color-accent);
}

.word-span.highlight-en {
  background: var(--color-a2-light);
  box-shadow: 0 2px 0 var(--color-a2);
}

/* ---- Vocabulary section ---- */
.vocab-section {
  max-width: var(--max-width, 960px);
  margin: 0 auto;
  padding: var(--space-xl) var(--space-md);
  border-top: 1px solid var(--color-border-light);
}

.vocab-section__title {
  font-family: var(--font-heading);
  font-size: 22px;
  margin-bottom: var(--space-md);
}

.vocab-list {
  display: grid;
  grid-template-columns: auto 1fr;
  column-gap: var(--space-md);
}

.vocab-item {
  display: contents;
}

.vocab-es,
.vocab-en {
  padding: var(--space-sm) 0;
  border-bottom: 1px solid var(--color-border-light);
}

.vocab-item:last-child .vocab-es,
.vocab-item:last-child .vocab-en {
  border-bottom: none;
}

.vocab-es {
  font-family: var(--font-reading);
  font-weight: 600;
  font-size: 15px;
  white-space: nowrap;
}

.vocab-en {
  font-size: 14px;
  color: var(--color-text-secondary);
}

/* ---- Continue reading prompt ---- */
.continue-prompt {
  position: fixed;
  bottom: var(--space-lg);
  left: 50%;
  transform: translateX(-50%);
  background: var(--color-text);
  color: var(--color-surface);
  padding: var(--space-sm) var(--space-lg);
  border-radius: var(--radius-pill);
  font-size: 14px;
  font-weight: 500;
  box-shadow: var(--shadow-lg);
  cursor: pointer;
  z-index: var(--z-overlay);
  display: flex;
  align-items: center;
  gap: var(--space-sm);
  transition: transform var(--transition-normal), opacity var(--transition-normal);
}

.continue-prompt:hover {
  transform: translateX(-50%) scale(1.02);
}

.continue-prompt__dismiss {
  opacity: 0.6;
  font-size: 12px;
  margin-left: var(--space-sm);
}

.continue-prompt__dismiss:hover {
  opacity: 1;
}

/* ---- Reader Settings Panel ---- */
.reader-settings {
  max-width: var(--max-width-reader);
  margin: 0 auto;
  padding: 0 var(--space-md);
  display: flex;
  flex-direction: column;
  align-items: center;
}

.reader-settings__toggle {
  display: inline-flex;
  align-items: center;
  gap: var(--space-xs);
  padding: var(--space-xs) var(--space-md);
  border-radius: var(--radius-pill);
  font-size: 13px;
  font-weight: 500;
  color: var(--color-text-secondary);
  border: 1px solid var(--color-border);
  background: var(--color-surface);
  cursor: pointer;
  transition: all var(--transition-fast);
  margin-bottom: var(--space-sm);
}

.reader-settings__toggle:hover,
.reader-settings__toggle.active {
  color: var(--color-text);
  border-color: var(--color-text-light);
}

.reader-settings__panel {
  display: none;
  flex-direction: column;
  gap: var(--space-md);
  padding: var(--space-md);
  background: var(--color-surface);
  border: 1px solid var(--color-border-light);
  border-radius: var(--radius-md);
  margin-bottom: var(--space-lg);
  width: 100%;
  max-width: 400px;
}

.reader-settings__panel.open {
  display: flex;
}

.reader-settings__group {
  display: flex;
  flex-direction: column;
  gap: var(--space-xs);
}

.reader-settings__label {
  font-size: 12px;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  color: var(--color-text-light);
}