/* dictation exercise player — dark-theme redesign (Phase A).
 *
 * Accessibility requirement (docs/dictation/ARCHITECTURE.md §7.4): text
 * sizing uses rem units, containers wrap instead of clipping at 200% browser
 * zoom, and diff feedback is never color-alone (each severity/kind pairing
 * below combines a distinct underline style with color) — this requirement
 * is untouched by the redesign; only the color VALUES feeding the markers
 * changed, never the encoding mechanism (text-decoration style + border +
 * ::before glyph).
 *
 * Player-only file — landing/review/catalog pages use pages.css instead,
 * which shares almost no rules with this one (no diff markers, no media
 * pane there).
 */

:root {
  --dp-accent: var(--color-primary);
  --dp-bg: var(--color-bg-surface);
  --dp-border: var(--surface-border);
  --dp-muted: var(--color-text-muted);
  --dp-panel: var(--surface-card);
  --dp-info: var(--color-info);
  --dp-minor: var(--color-warning);
  --dp-critical: var(--color-danger);
  --dp-radius: var(--radius-2);
  --dp-radius-lg: var(--radius-3);
  --dp-shadow: var(--shadow-1);
}

.dp-player {
  max-width: 72rem;
  margin: 0 auto;
  padding: 1.5rem;
  font-size: 1rem;
  color: var(--color-text-base);
}

.dp-header {
  margin-bottom: 1rem;
}

.dp-back-link {
  display: inline-flex;
  align-items: center;
  gap: 0.35rem;
  color: var(--dp-muted);
  text-decoration: none;
  font-size: 0.85rem;
  margin-bottom: 0.75rem;
}

.dp-back-link:hover {
  color: var(--color-text-base);
}

.dp-title {
  font-size: 1.5rem;
  margin: 0 0 0.25rem;
  color: var(--color-text-base);
}

.dp-meta {
  color: var(--dp-muted);
  font-size: 0.9rem;
}

/* Two-pane layout: media left (~55%), answer/controls right (~45%).
 * Collapses to a single column below the sitewide md breakpoint. */
.dp-player-layout {
  display: grid;
  grid-template-columns: minmax(0, 1.4fr) minmax(0, 1fr);
  gap: var(--space-5);
  align-items: start;
}

@media (max-width: 767px) {
  .dp-player-layout {
    grid-template-columns: 1fr;
  }
}

.dp-media-pane {
  background: var(--dp-panel);
  border: 1px solid var(--dp-border);
  border-radius: var(--dp-radius-lg);
  padding: 1rem;
}

.dp-answer-pane {
  display: flex;
  flex-direction: column;
  gap: 0.75rem;
}

.dp-controls,
.dp-actions,
.dp-tabs,
.dp-media-controls {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
  align-items: center;
  margin: 1rem 0;
}

.dp-btn {
  font-size: 1rem;
  padding: 0.5rem 1rem;
  min-height: 2.5rem;
  border-radius: var(--dp-radius);
  border: 1px solid var(--dp-border);
  background: var(--surface-card);
  color: var(--color-text-base);
  cursor: pointer;
  transition: background var(--motion-fast);
}

.dp-btn:hover:not(:disabled) {
  background: var(--surface-card-strong);
}

.dp-btn--primary {
  background: var(--dp-accent);
  color: var(--color-primary-text);
  border-color: transparent;
}

.dp-btn--primary:hover:not(:disabled) {
  background: var(--color-primary-strong);
}

.dp-btn:disabled {
  opacity: 0.5;
  cursor: not-allowed;
}

@media (max-width: 767px) {
  .dp-btn {
    min-height: 44px;
  }
}

.dp-tab {
  font-size: 1rem;
  padding: 0.5rem 1rem;
  min-height: 2.5rem;
  border: none;
  border-bottom: 2px solid transparent;
  background: none;
  color: var(--dp-muted);
  cursor: pointer;
}

.dp-tab--active {
  border-bottom-color: var(--dp-accent);
  color: var(--color-text-base);
  font-weight: 600;
}

.dp-segment-counter {
  font-variant-numeric: tabular-nums;
  color: var(--dp-muted);
}

.dp-play-btn {
  width: 3rem;
  height: 3rem;
  min-height: 3rem;
  border-radius: var(--dp-radius);
  border: 1px solid var(--dp-border);
  background: var(--surface-card);
  color: var(--dp-accent);
  font-size: 1.1rem;
  cursor: pointer;
  transition: background var(--motion-fast);
  display: flex;
  align-items: center;
  justify-content: center;
}

.dp-play-btn:hover {
  background: var(--surface-card-strong);
}

.dp-segment-nav {
  display: flex;
  align-items: center;
  gap: 0.75rem;
}

.dp-nav-arrow {
  font-size: 1.1rem;
  padding: 0.4rem 0.6rem;
  min-height: 2.5rem;
  border-radius: var(--dp-radius);
  border: 1px solid var(--dp-border);
  background: var(--surface-card);
  color: var(--color-text-base);
  cursor: pointer;
}

.dp-nav-arrow:hover:not(:disabled) {
  background: var(--surface-card-strong);
}

.dp-nav-arrow:disabled {
  opacity: 0.5;
  cursor: not-allowed;
}

.dp-mode-switch {
  display: flex;
  gap: 0.5rem;
  margin-bottom: 0.75rem;
}

.dp-mode-btn {
  font-size: 0.875rem;
  padding: 0.35rem 0.9rem;
  min-height: 2rem;
  border-radius: 999px;
  border: 1px solid var(--dp-border);
  background: transparent;
  color: var(--dp-muted);
  cursor: pointer;
}

.dp-mode-btn--active {
  background: var(--dp-accent);
  color: var(--color-primary-text);
  border-color: transparent;
  font-weight: 600;
}

.dp-wordbank {
  display: flex;
  flex-direction: column;
  gap: 0.75rem;
  margin: 0.5rem 0;
}

.dp-wordbank-answer {
  min-height: 3.5rem;
  padding: 0.6rem;
  border-radius: var(--dp-radius);
  border: 1px dashed var(--dp-border);
  background: var(--dp-panel);
  display: flex;
  flex-wrap: wrap;
  gap: 0.4rem;
  align-items: flex-start;
}

.dp-wordbank-placeholder {
  color: var(--dp-muted);
  font-size: 0.9rem;
  padding: 0.4rem 0.2rem;
}

.dp-wordbank-bank {
  display: flex;
  flex-wrap: wrap;
  gap: 0.4rem;
}

.dp-wordbank-tile {
  font-size: 1rem;
  padding: 0.4rem 0.75rem;
  min-height: 2.25rem;
  border-radius: var(--dp-radius);
  border: 1px solid var(--dp-border);
  background: var(--surface-card);
  color: var(--color-text-base);
  cursor: grab;
  transition: background var(--motion-fast);
}

.dp-wordbank-tile:active {
  cursor: grabbing;
}

/* Thin vertical line showing where a dragged tile will land — same
 * --dp-accent as the placed-tile fill, so it reads as "this is where the
 * accent-colored tile goes" rather than an unrelated new color. */
.dp-wordbank-drop-marker {
  width: 2px;
  align-self: stretch;
  min-height: 2.25rem;
  background: var(--dp-accent);
  border-radius: 1px;
}

.dp-wordbank-tile:hover {
  background: var(--surface-card-strong);
}

.dp-wordbank-tile--placed {
  background: var(--dp-accent);
  color: var(--color-primary-text);
  border-color: transparent;
}

@media (max-width: 767px) {
  .dp-play-btn,
  .dp-nav-arrow,
  .dp-wordbank-tile {
    min-height: 44px;
  }
}

.dp-hint-chip {
  display: inline-flex;
  align-items: center;
  gap: 0.35rem;
  font-size: 0.85rem;
  color: var(--color-text-soft);
  background: var(--dp-panel);
  border: 1px solid var(--dp-border);
  border-radius: var(--dp-radius);
  padding: 0.3rem 0.6rem;
  width: fit-content;
}

.dp-answer {
  width: 100%;
  min-height: 4rem;
  font-size: 1.1rem;
  padding: 0.75rem;
  border-radius: var(--dp-radius);
  border: 1px solid var(--dp-border);
  background: var(--color-bg-raised);
  color: var(--color-text-base);
  box-sizing: border-box;
  resize: vertical;
}

.dp-answer::placeholder {
  color: var(--color-text-faint);
}

.dp-transcript,
.dp-answer-reveal {
  font-size: 1.1rem;
  line-height: 1.6;
  padding: 0.75rem;
  background: var(--dp-panel);
  border-radius: var(--dp-radius);
  white-space: pre-wrap;
  overflow-wrap: break-word;
  color: var(--color-text-soft);
}

.dp-translation {
  margin-top: 0.75rem;
  padding: 0.75rem;
  background: var(--dp-panel);
  border-radius: var(--dp-radius);
  font-size: 1.05rem;
  color: var(--color-text-base);
}

.dp-translation-label {
  font-size: 0.75rem;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  color: var(--dp-muted);
  margin-bottom: 0.25rem;
}

.dp-diff-words {
  display: flex;
  flex-wrap: wrap;
  gap: 0.35rem;
  font-size: 1.1rem;
  line-height: 1.8;
}

.dp-diff-verdict {
  font-weight: 600;
  text-transform: uppercase;
  font-size: 0.85rem;
  letter-spacing: 0.05em;
  margin-bottom: 0.5rem;
  color: var(--color-text-soft);
}

/* Color-independent word markers — color is never the only signal.
 * DO NOT change the encoding mechanism here (text-decoration style,
 * border, ::before glyph) without re-verifying docs/dictation/
 * ARCHITECTURE.md §7.4 — only the color values were part of this redesign. */
.dp-word {
  padding: 0 0.1em;
}

.dp-word--clean {
  color: inherit;
}

.dp-word--match-info {
  color: var(--dp-info);
  text-decoration: underline dotted;
}

.dp-word--match-minor {
  color: var(--dp-minor);
  text-decoration: underline dotted;
  text-decoration-thickness: 0.15em;
}

.dp-word--match-critical {
  color: var(--dp-critical);
  text-decoration: underline dotted;
  text-decoration-thickness: 0.2em;
}

.dp-word--wrong {
  color: var(--dp-critical);
  text-decoration: underline solid;
  text-decoration-thickness: 0.2em;
}

.dp-word--wrong::before {
  content: "✕ ";
}

.dp-word--wrong-minor {
  color: var(--dp-minor);
  text-decoration: underline wavy;
}

.dp-word--missing {
  color: var(--dp-critical);
  border: 1px dashed currentColor;
  border-radius: 0.25em;
}

.dp-word--missing::before {
  content: "∅ ";
}

.dp-word--extra {
  color: var(--dp-critical);
  text-decoration: line-through solid;
  text-decoration-thickness: 0.15em;
}

.dp-loading,
.dp-error {
  padding: 2rem;
  text-align: center;
  font-size: 1.1rem;
  color: var(--dp-muted);
}

.dp-anon-banner {
  background: var(--dp-panel);
  border: 1px solid var(--dp-border);
  border-radius: var(--dp-radius);
  padding: 0.75rem 1rem;
  margin-bottom: 1rem;
  font-size: 0.95rem;
  color: var(--color-text-soft);
}

.dp-anon-banner a {
  color: var(--dp-accent);
  font-weight: 600;
}

.dp-speed-control {
  display: flex;
  align-items: center;
  gap: 0.4rem;
  font-size: 0.9rem;
  color: var(--color-text-soft);
}

.dp-speed-control input[type="range"] {
  width: 6rem;
  accent-color: var(--dp-accent);
}

.dp-loop-toggle {
  display: flex;
  align-items: center;
  gap: 0.3rem;
  font-size: 0.9rem;
  color: var(--color-text-soft);
}

.dp-loop-toggle input[type="checkbox"] {
  accent-color: var(--dp-accent);
}

.dp-toolbar {
  display: flex;
  flex-wrap: wrap;
  gap: 0.3rem;
  margin-bottom: 0.5rem;
}

.dp-toolbar-key {
  font-size: 1rem;
  min-width: 2.5rem;
  min-height: 2.5rem;
  padding: 0.25rem 0.4rem;
  border-radius: var(--dp-radius);
  border: 1px solid var(--dp-border);
  background: var(--surface-card);
  color: var(--color-text-base);
  cursor: pointer;
}

.dp-toolbar-key:hover {
  background: var(--surface-card-strong);
}

.dp-xp-toast {
  font-size: 0.9rem;
  font-weight: 600;
  color: var(--dp-accent);
  margin: 0.25rem 0;
}

.dp-hint-reveal {
  font-size: 1.1rem;
  line-height: 1.6;
  padding: 0.5rem 0.75rem;
  background: var(--dp-panel);
  border-radius: var(--dp-radius);
  margin: 0.5rem 0;
  color: var(--color-text-soft);
}

audio.dp-audio {
  width: 100%;
}

.dp-youtube-wrap {
  /* Reserved before the iframe mounts — same CLS discipline as the
     thumbnail-fallback cards on the catalog pages (Phase A). */
  aspect-ratio: 16 / 9;
  width: 100%;
  border-radius: var(--dp-radius);
  overflow: hidden;
  background: var(--color-bg-canvas);
}

.dp-youtube-iframe {
  width: 100%;
  height: 100%;
}

.dp-youtube-iframe iframe {
  width: 100%;
  height: 100%;
  border: 0;
}