/* ================================================================
   3. FLOATING HANDS-FREE AUDIO IMMERSION PLAYER
   ================================================================ */
.immersion-floating-trigger {
  position: fixed;
  bottom: 24px;
  right: 24px;
  z-index: 99990;
  background: linear-gradient(135deg, #6657d9 0%, #4338ca 100%);
  color: #ffffff;
  border: 0;
  border-radius: 999px;
  padding: 10px 18px;
  font-size: 13px;
  font-weight: 700;
  display: inline-flex;
  align-items: center;
  gap: 8px;
  box-shadow: 0 8px 24px rgba(102, 87, 217, 0.4), 0 2px 6px rgba(0,0,0,0.1);
  cursor: pointer;
  transition: all 0.2s cubic-bezier(0.16, 1, 0.3, 1);
}
.immersion-floating-trigger:hover {
  transform: translateY(-2px) scale(1.03);
  box-shadow: 0 12px 30px rgba(102, 87, 217, 0.5);
}
.immersion-floating-trigger.playing {
  background: linear-gradient(135deg, #059669 0%, #047857 100%);
  box-shadow: 0 8px 24px rgba(5, 150, 105, 0.4);
}

/* Mini Audio Bars Animation */
.immersion-eq-bars {
  display: inline-flex;
  align-items: flex-end;
  gap: 2.5px;
  height: 14px;
}
.immersion-eq-bar {
  width: 2.5px;
  background: #ffffff;
  border-radius: 2px;
  height: 4px;
  transition: height 0.15s ease;
}
.immersion-floating-trigger.playing .immersion-eq-bar:nth-child(1) {
  animation: eqBounce 0.8s ease-in-out infinite alternate;
}
.immersion-floating-trigger.playing .immersion-eq-bar:nth-child(2) {
  animation: eqBounce 0.6s ease-in-out infinite alternate 0.2s;
}
.immersion-floating-trigger.playing .immersion-eq-bar:nth-child(3) {
  animation: eqBounce 0.9s ease-in-out infinite alternate 0.4s;
}
.immersion-floating-trigger.playing .immersion-eq-bar:nth-child(4) {
  animation: eqBounce 0.7s ease-in-out infinite alternate 0.1s;
}

@keyframes eqBounce {
  0% { height: 3px; }
  100% { height: 14px; }
}

/* Expanded Player Dock */
.immersion-player-card {
  position: fixed;
  bottom: 24px;
  right: 24px;
  z-index: 99995;
  width: min(420px, calc(100vw - 32px));
  background: #ffffff;
  border: 1.5px solid #e2e8f0;
  border-radius: 20px;
  box-shadow: 0 20px 50px rgba(15, 23, 42, 0.18), 0 0 0 1px rgba(0, 0, 0, 0.05);
  overflow: hidden;
  animation: immersionSlideUp 0.25s cubic-bezier(0.16, 1, 0.3, 1);
  display: flex;
  flex-direction: column;
}
.immersion-player-card.hidden,
.immersion-player-card[hidden] {
  display: none !important;
}

.immersion-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 12px 16px;
  background: #f8fafc;
  border-bottom: 1px solid #e2e8f0;
}
.immersion-header-title {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 13.5px;
  font-weight: 800;
  color: #1e1b4b;
}
.immersion-header-actions {
  display: flex;
  align-items: center;
  gap: 4px;
}
.immersion-icon-btn {
  border: 0;
  background: transparent;
  color: #64748b;
  width: 28px;
  height: 28px;
  border-radius: 8px;
  cursor: pointer;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  font-size: 14px;
  transition: all 0.12s ease;
}
.immersion-icon-btn:hover {
  background: #e2e8f0;
  color: #1e1b4b;
}

.immersion-body {
  padding: 14px 16px;
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.immersion-selector-row {
  display: flex;
  gap: 8px;
}
.immersion-select {
  flex: 1;
  background: #f8fafc;
  border: 1px solid #cbd5e1;
  border-radius: 10px;
  padding: 6px 10px;
  font-size: 12.5px;
  font-weight: 600;
  color: #334155;
  outline: none;
}

/* Subtitle Box */
.immersion-subtitle-box {
  background: #fdfcff;
  border: 1.5px solid #ede9fe;
  border-radius: 14px;
  padding: 12px 16px;
  min-height: 88px;
  display: flex;
  flex-direction: column;
  justify-content: center;
  align-items: center;
  text-align: center;
  position: relative;
}
.immersion-hanzi-text {
  font-size: 23px;
  font-weight: 600;
  font-family: STKaiti, KaiTi, 'KaiTi SC', serif;
  color: #1e1b4b;
  line-height: 1.3;
}
.immersion-pinyin-text {
  font-size: 13.5px;
  font-weight: 700;
  color: #6657d9;
  margin-top: 3px;
}
.immersion-meaning-text {
  font-size: 12.5px;
  color: #475569;
  margin-top: 3px;
}

/* Voice Shadowing & Recording Dock */
.immersion-voice-dock {
  background: #f8fafc;
  border: 1px solid #e2e8f0;
  border-radius: 12px;
  padding: 8px 10px;
  display: flex;
  flex-direction: column;
  gap: 6px;
}

.immersion-voice-row {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 6px;
}

.immersion-v-btn {
  display: inline-flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 2px;
  padding: 6px 3px;
  border-radius: 8px;
  border: 1px solid #cbd5e1;
  background: #ffffff;
  color: #334155;
  font-size: 11px;
  font-weight: 700;
  cursor: pointer;
  transition: all 0.15s ease;
  user-select: none;
}
.immersion-v-btn:hover:not(:disabled) {
  transform: translateY(-1px);
  box-shadow: 0 2px 6px rgba(0,0,0,0.06);
}
.immersion-v-btn:disabled {
  opacity: 0.45;
  cursor: not-allowed;
  background: #f1f5f9;
  border-color: #e2e8f0;
}
.immersion-v-btn .v-icon {
  font-size: 14px;
  line-height: 1;
}

/* Specific Voice Button Styles */
.immersion-v-btn.rec-btn {
  background: #fdf2f8;
  border-color: #fbcfe8;
  color: #be185d;
}
.immersion-v-btn.rec-btn:hover:not(:disabled) {
  background: #fce7f3;
  border-color: #f472b6;
}
.immersion-v-btn.rec-btn.is-recording {
  background: #ef4444;
  border-color: #dc2626;
  color: #ffffff;
  animation: recPulse 1s infinite alternate;
}
.immersion-v-btn.rec-btn.is-recording .rec-dot {
  animation: blinkDot 0.8s infinite;
}

@keyframes recPulse {
  0% { box-shadow: 0 0 0 0 rgba(239, 68, 68, 0.4); }
  100% { box-shadow: 0 0 0 6px rgba(239, 68, 68, 0); }
}
@keyframes blinkDot {
  0%, 100% { opacity: 1; }
  50% { opacity: 0.2; }
}

.immersion-v-btn.play-user-btn {
  background: #f0fdf4;
  border-color: #bbf7d0;
  color: #15803d;
}
.immersion-v-btn.play-user-btn:hover:not(:disabled) {
  background: #dcfce7;
  border-color: #86efac;
}
.immersion-v-btn.play-user-btn.is-playing-user {
  background: #22c55e;
  color: #ffffff;
  border-color: #16a34a;
}

.immersion-v-btn.native-sample-btn {
  background: #eff6ff;
  border-color: #bfdbfe;
  color: #1d4ed8;
}
.immersion-v-btn.native-sample-btn:hover:not(:disabled) {
  background: #dbeafe;
  border-color: #93c5fd;
}
.immersion-v-btn.native-sample-btn.is-playing-sample {
  background: #3b82f6;
  color: #ffffff;
  border-color: #2563eb;
}

.immersion-v-btn.compare-btn {
  background: #faf5ff;
  border-color: #e9d5ff;
  color: #7e22ce;
}
.immersion-v-btn.compare-btn:hover:not(:disabled) {
  background: #f3e8ff;
  border-color: #d8b4fe;
}
.immersion-v-btn.compare-btn.is-comparing {
  background: #a855f7;
  color: #ffffff;
  border-color: #9333ea;
}

/* Feedback Box */
.immersion-voice-feedback {
  display: flex;
  align-items: center;
  gap: 6px;
  font-size: 11px;
  color: #475569;
  background: #ffffff;
  padding: 4px 8px;
  border-radius: 6px;
  border: 1px dashed #cbd5e1;
  min-height: 24px;
  line-height: 1.3;
}
.immersion-voice-feedback .feedback-icon {
  font-size: 12px;
  flex-shrink: 0;
}
.immersion-voice-feedback .feedback-text {
  flex: 1;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}
.immersion-voice-feedback[data-type="recording"] {
  background: #fef2f2;
  border-color: #fca5a5;
  color: #991b1b;
  font-weight: 600;
}
.immersion-voice-feedback[data-type="success"] {
  background: #f0fdf4;
  border-color: #86efac;
  color: #166534;
  font-weight: 600;
}
.immersion-voice-feedback[data-type="playing"] {
  background: #eff6ff;
  border-color: #93c5fd;
  color: #1e40af;
}
.immersion-voice-feedback[data-type="error"] {
  background: #fff1f2;
  border-color: #fecdd3;
  color: #be123c;
}
.immersion-voice-feedback[data-type="info"] {
  background: #f8fafc;
  border-color: #cbd5e1;
  color: #334155;
}

/* Controls Bar */
.immersion-controls {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 2px 4px;
}
.immersion-playback-btns {
  display: flex;
  align-items: center;
  gap: 8px;
}
.immersion-play-btn {
  width: 42px;
  height: 42px;
  border-radius: 999px;
  background: #6657d9;
  color: #ffffff;
  border: 0;
  font-size: 17px;
  cursor: pointer;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  box-shadow: 0 4px 12px rgba(102, 87, 217, 0.35);
  transition: transform 0.15s ease;
}
.immersion-play-btn:hover {
  transform: scale(1.08);
}
.immersion-step-btn {
  width: 32px;
  height: 32px;
  border-radius: 999px;
  background: #f1f5f9;
  border: 1px solid #cbd5e1;
  color: #475569;
  font-size: 13px;
  cursor: pointer;
  display: inline-flex;
  align-items: center;
  justify-content: center;
}
.immersion-step-btn:hover {
  background: #e2e8f0;
  color: #1e1b4b;
}

.immersion-settings-row {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 6px 10px;
  background: #f8fafc;
  border-radius: 8px;
  font-size: 11.5px;
  color: #64748b;
}
.immersion-chip-btn {
  border: 1px solid #cbd5e1;
  background: #ffffff;
  color: #475569;
  border-radius: 6px;
  padding: 3px 8px;
  font-size: 11px;
  font-weight: 700;
  cursor: pointer;
}
.immersion-chip-btn.active {
  background: #6657d9;
  color: #ffffff;
  border-color: #6657d9;
}

@keyframes immersionSlideUp {
  from { transform: translateY(20px); opacity: 0; }
  to { transform: translateY(0); opacity: 1; }
}

/* Nâng nhẹ nút nổi khi thanh TTS Audio đang phát ở góc dưới */
body:has(.hsk-audio-status:not([hidden])) .immersion-floating-trigger {
  bottom: calc(76px + env(safe-area-inset-bottom, 0px));
}

/* Khi máy nghe thụ động đang mở toàn màn hình/dock, ẩn các nút nổi khác để không che khuất */
body.immersion-card-open .immersion-floating-trigger {
  opacity: 0;
  pointer-events: none;
  transform: translateY(12px) scale(0.9);
}

@media (max-width: 640px) {
  .immersion-floating-trigger {
    bottom: calc(16px + env(safe-area-inset-bottom, 0px));
    right: 16px;
    padding: 8px 13px;
    font-size: 12px;
    border-radius: 999px;
    box-shadow: 0 4px 16px rgba(102, 87, 217, 0.35);
    z-index: 9980;
  }
  .immersion-player-card {
    bottom: calc(14px + env(safe-area-inset-bottom, 0px));
    right: 12px;
    left: 12px;
    width: auto;
    z-index: 99995;
    border-radius: 18px;
  }
}