.story-tts-shell {
  margin: 2rem 0;
  font-family: system-ui, -apple-system, "Segoe UI", Roboto, Ubuntu, Cantarell, "Noto Sans", sans-serif;
}

.story-tts-card {
  border-radius: 16px;
  padding: 1.1rem 1.15rem 1rem;
  background: linear-gradient(135deg, #f8fafc 0%, #eef2ff 45%, #fdf2f8 100%);
  border: 1px solid rgba(99, 102, 241, 0.22);
  box-shadow: 0 18px 40px rgba(15, 23, 42, 0.08);
}

.story-tts-card-head {
  margin-bottom: 0.75rem;
}

.story-tts-tabs {
  display: flex;
  gap: 0.35rem;
  padding: 0.25rem;
  border-radius: 12px;
  background: rgba(255, 255, 255, 0.72);
  border: 1px solid rgba(148, 163, 184, 0.35);
}

.story-tts-tab {
  flex: 1 1 0;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.4rem;
  min-height: 42px;
  padding: 0.45rem 0.65rem;
  border: none;
  border-radius: 10px;
  cursor: pointer;
  font: inherit;
  font-size: 0.88rem;
  font-weight: 600;
  color: #475569;
  background: transparent;
  transition: background 0.15s ease, color 0.15s ease, box-shadow 0.15s ease;
}

.story-tts-tab:hover:not(:disabled) {
  color: #1e293b;
  background: rgba(255, 255, 255, 0.65);
}

.story-tts-tab.is-active {
  color: #312e81;
  background: #fff;
  box-shadow: 0 4px 14px rgba(99, 102, 241, 0.18);
}

.story-tts-tab:disabled {
  opacity: 0.45;
  cursor: not-allowed;
}

.story-tts-tab-icon {
  display: inline-flex;
  color: #6366f1;
}

.story-tts-tab-label {
  line-height: 1.2;
}

.story-tts-pane[hidden] {
  display: none !important;
}

.story-tts-pane--ambient {
  padding-top: 0.15rem;
}

.story-tts-ambient-bar {
  display: flex;
  align-items: center;
  gap: 0.85rem;
  padding: 0.65rem 0.75rem;
  border-radius: 14px;
  background: rgba(255, 255, 255, 0.85);
  border: 1px solid rgba(148, 163, 184, 0.35);
}

.story-tts-ambient-now {
  margin: 0;
  font-size: 0.95rem;
  font-weight: 700;
  color: #0f172a;
}

.story-tts-ambient-picker {
  display: flex;
  flex-wrap: wrap;
  gap: 0.45rem;
  margin-top: 0.75rem;
}

.story-tts-ambient-chip {
  border: 1px solid rgba(99, 102, 241, 0.28);
  border-radius: 999px;
  padding: 0.42rem 0.85rem;
  font: inherit;
  font-size: 0.84rem;
  font-weight: 600;
  color: #4338ca;
  background: rgba(255, 255, 255, 0.9);
  cursor: pointer;
  transition: background 0.15s ease, color 0.15s ease, border-color 0.15s ease, box-shadow 0.15s ease;
}

.story-tts-ambient-chip:hover {
  border-color: rgba(99, 102, 241, 0.5);
  box-shadow: 0 4px 12px rgba(99, 102, 241, 0.12);
}

.story-tts-ambient-chip.is-active {
  color: #fff;
  background: linear-gradient(135deg, #6366f1, #8b5cf6);
  border-color: transparent;
  box-shadow: 0 8px 18px rgba(99, 102, 241, 0.28);
}

.story-tts-ambient-empty {
  margin: 0.75rem 0 0;
  font-size: 0.85rem;
  color: #64748b;
  line-height: 1.45;
}

.story-tts-ambient-empty[hidden] {
  display: none !important;
}

.story-tts-ambient-play-icon {
  display: inline-flex;
  align-items: center;
  justify-content: center;
}

.story-tts-ambient-audio {
  display: none;
}

.story-tts-bar {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 0.65rem 0.85rem;
  padding: 0.55rem 0.65rem;
  border-radius: 14px;
  background: rgba(255, 255, 255, 0.85);
  border: 1px solid rgba(148, 163, 184, 0.35);
  transition: opacity 0.2s ease;
}

.story-tts-card[aria-busy='true'] .story-tts-bar {
  opacity: 0.55;
  pointer-events: none;
}

.story-tts-loader {
  display: flex;
  align-items: flex-start;
  gap: 0.85rem;
  margin-top: 0.75rem;
  padding: 0.85rem 1rem;
  border-radius: 12px;
  background: rgba(255, 255, 255, 0.92);
  border: 1px solid rgba(99, 102, 241, 0.28);
  box-shadow: inset 0 1px 0 rgba(255, 255, 255, 0.8);
}

.story-tts-loader[hidden] {
  display: none !important;
}

.story-tts-spinner {
  flex-shrink: 0;
  width: 28px;
  height: 28px;
  margin-top: 2px;
  border-radius: 50%;
  border: 3px solid rgba(99, 102, 241, 0.2);
  border-top-color: #6366f1;
  animation: story-tts-spin 0.75s linear infinite;
}

.story-tts-loader-text {
  display: flex;
  flex-direction: column;
  gap: 0.35rem;
  min-width: 0;
  font-size: 0.88rem;
  line-height: 1.45;
  color: #334155;
}

.story-tts-loader-title {
  display: block;
  font-size: 0.95rem;
  font-weight: 700;
  color: #4f46e5;
}

.story-tts-loader-hint {
  display: block;
  font-size: 0.82rem;
  color: #64748b;
}

@keyframes story-tts-spin {
  to {
    transform: rotate(360deg);
  }
}

@media (prefers-reduced-motion: reduce) {
  .story-tts-spinner {
    animation: none;
    border-top-color: rgba(99, 102, 241, 0.45);
    opacity: 0.85;
  }
}

.story-tts-transport,
.story-tts-util {
  display: inline-flex;
  align-items: center;
  gap: 0.45rem;
}

.story-tts-iconbtn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 40px;
  height: 40px;
  padding: 0;
  border: none;
  border-radius: 50%;
  cursor: pointer;
  color: #1a1a1a;
  background: linear-gradient(180deg, #ddcfb0, #b89b62);
  box-shadow: 0 6px 14px rgba(91, 74, 38, 0.22);
  transition: transform 0.15s ease, filter 0.15s ease, box-shadow 0.15s ease;
}

.story-tts-iconbtn:hover {
  filter: brightness(1.05);
  transform: translateY(-1px);
}

.story-tts-iconbtn:active {
  transform: translateY(0);
}

.story-tts-iconbtn:disabled {
  opacity: 0.55;
  cursor: not-allowed;
  transform: none;
  box-shadow: none;
}

.story-tts-iconbtn--primary {
  width: 46px;
  height: 46px;
  background: linear-gradient(135deg, #6366f1, #a855f7);
  color: #fff;
  box-shadow: 0 10px 22px rgba(99, 102, 241, 0.35);
}

.story-tts-iconbtn--primary:hover {
  filter: brightness(1.06);
}

.story-tts-play-icon {
  display: inline-flex;
  align-items: center;
  justify-content: center;
}

.story-tts-progress-wrap {
  flex: 1 1 180px;
  min-width: 140px;
}

.story-tts-progress {
  width: 100%;
  accent-color: #6366f1;
}

.story-tts-time {
  display: flex;
  justify-content: space-between;
  align-items: center;
  font-size: 0.78rem;
  color: #64748b;
  margin-top: 0.2rem;
  font-variant-numeric: tabular-nums;
}

.story-tts-settings-panel {
  margin-top: 0.65rem;
  padding-top: 0.65rem;
  border-top: 1px solid rgba(148, 163, 184, 0.35);
}

.story-tts-settings-panel[hidden] {
  display: none !important;
}

.story-tts-settings-label {
  display: flex;
  flex-direction: column;
  gap: 0.35rem;
  font-size: 0.72rem;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  color: #64748b;
}

.story-tts-settings-label select {
  text-transform: none;
  letter-spacing: normal;
  font-size: 0.9rem;
  border-radius: 10px;
  border: 1px solid #cbd5f5;
  padding: 0.4rem 0.55rem;
  background: #fff;
  color: #0f172a;
}

.story-tts-status {
  margin: 0.55rem 0 0;
  font-size: 0.85rem;
  color: #b45309;
  min-height: 1.2em;
}

.story-tts-audio {
  display: none;
}

@media (max-width: 640px) {
  .story-tts-bar {
    flex-direction: column;
    align-items: stretch;
  }

  .story-tts-transport,
  .story-tts-util {
    justify-content: center;
  }

  .story-tts-progress-wrap {
    flex-basis: auto;
    width: 100%;
  }
}