/* ================================================
   掌握最伟大的秘密（英文版）— 主题样式（深海蓝绿色系）
   定义 CSS 变量
   ================================================ */

/* === Theme Variables === */
:root {
  --color-primary: #2a7f83;
  --color-primary-light: #3a9da2;
  --color-primary-dark: #1d5f62;
  --color-primary-glow: rgba(42, 127, 131, 0.10);
  --color-primary-rgb: 42, 127, 131;
  --color-accent: #c49835;
  --color-accent-rgb: 196, 152, 53;
}

/* === Inline Audio Play Button (h3 🎧) === */
.audio-inline-play {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 28px;
  height: 28px;
  border: none;
  border-radius: 50%;
  background: rgba(var(--color-primary-rgb), 0.10);
  color: var(--color-primary);
  cursor: pointer;
  margin-right: var(--space-2);
  vertical-align: middle;
  transition: var(--transition);
  flex-shrink: 0;
  position: relative;
  line-height: 1;
}

.audio-inline-play svg {
  width: 16px;
  height: 16px;
}

.audio-inline-play.playing {
  background: var(--color-primary);
  color: #fff;
  animation: audio-inline-pulse 1.5s ease-in-out infinite;
}

@keyframes audio-inline-pulse {
  0%, 100% { box-shadow: 0 0 0 0 rgba(var(--color-primary-rgb), 0.3); }
  50% { box-shadow: 0 0 0 6px rgba(var(--color-primary-rgb), 0); }
}

@media (hover: hover) {
  .audio-inline-play:hover {
    background: rgba(var(--color-primary-rgb), 0.20);
    transform: scale(1.1);
  }
  .audio-inline-play.playing:hover {
    background: var(--color-primary-dark);
  }
}

/* h3 with inline audio button: flex so text wraps around icon */
#teachingsContent h3[data-audio] {
  display: flex;
  align-items: center;
  flex-wrap: wrap;
}

/* === Audio Guide — In-page Card === */
.audio-guide-card {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: var(--space-5) var(--space-6);
  box-shadow: var(--shadow-sm);
  margin-bottom: var(--space-6);
  overflow: hidden;
  min-width: 0;
  transition: var(--transition);
}

@media (hover: hover) {
  .audio-guide-card:hover {
    box-shadow: var(--shadow-md);
  }
}

.audio-guide-header {
  display: flex;
  align-items: center;
  gap: var(--space-4);
  margin-bottom: var(--space-4);
}

.audio-header-play-btn {
  margin-left: auto;
  min-height: var(--touch-target-sm);
  border: none;
  border-radius: var(--radius-sm);
  background: linear-gradient(135deg, var(--color-primary-light), var(--color-primary));
  color: #fff;
  font-size: 0.82rem;
  font-weight: 600;
  cursor: pointer;
  padding: var(--space-1) var(--space-4);
  transition: var(--transition);
  white-space: nowrap;
  flex-shrink: 0;
}

@media (hover: hover) {
  .audio-header-play-btn:hover {
    filter: brightness(1.08);
    transform: translateY(-1px);
  }
}

.audio-guide-icon {
  font-size: 2rem;
  line-height: 1;
  flex-shrink: 0;
  color: var(--color-primary);
}

.audio-guide-icon svg {
  width: 32px;
  height: 32px;
}

.audio-guide-title {
  font-size: 1.1rem;
  font-weight: 700;
  color: var(--color-text);
  margin: 0 0 var(--space-1) 0;
}

.audio-guide-desc {
  font-size: 0.9rem;
  color: var(--color-text-secondary);
  margin: 0;
  line-height: 1.5;
}

.audio-guide-play-all {
  min-height: var(--touch-target-sm);
  border: none;
  border-radius: var(--radius-sm);
  background: linear-gradient(135deg, var(--color-primary-light), var(--color-primary));
  color: #fff;
  font-size: 0.85rem;
  font-weight: 600;
  cursor: pointer;
  padding: var(--space-1) var(--space-4);
  transition: var(--transition);
  white-space: nowrap;
  flex-shrink: 0;
}

/* Play/pause icon button in control bar */
.audio-guide-play-pause {
  width: var(--touch-target-sm);
  height: var(--touch-target-sm);
  border: none;
  border-radius: 50%;
  background: linear-gradient(135deg, var(--color-primary-light), var(--color-primary));
  color: #fff;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: var(--transition);
  flex-shrink: 0;
  padding: 0;
}

.audio-guide-play-pause svg {
  width: 16px;
  height: 16px;
}

@media (hover: hover) {
  .audio-guide-play-pause:hover {
    filter: brightness(1.08);
    transform: translateY(-1px);
  }
}

/* Prev / Next / Skip icon buttons */
.audio-ctrl-icon {
  width: var(--touch-target-sm);
  height: var(--touch-target-sm);
  border: none;
  border-radius: var(--radius-sm);
  background: transparent;
  color: var(--color-text-secondary);
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: var(--transition);
  flex-shrink: 0;
  padding: 0;
}

.audio-ctrl-icon svg {
  width: 18px;
  height: 18px;
}

@media (hover: hover) {
  .audio-ctrl-icon:hover {
    color: var(--color-primary);
    background: rgba(var(--color-primary-rgb), 0.08);
  }
}

/* Loop / repeat mode toggle */
.audio-guide-loop-btn {
  width: var(--touch-target-sm);
  height: var(--touch-target-sm);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-sm);
  background: var(--color-bg-alt);
  color: var(--color-text-muted);
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: var(--transition);
  flex-shrink: 0;
  padding: 0;
}

.audio-guide-loop-btn svg {
  width: 18px;
  height: 18px;
}

.audio-guide-loop-btn.active {
  color: var(--color-primary);
  border-color: var(--color-primary);
  background: rgba(var(--color-primary-rgb), 0.08);
}

@media (hover: hover) {
  .audio-guide-loop-btn:hover {
    color: var(--color-primary);
    border-color: var(--color-primary);
  }
}

@media (hover: hover) {
  .audio-guide-play-all:hover {
    filter: brightness(1.08);
    transform: translateY(-1px);
  }
}

/* Now playing area — stacked layout */
.audio-now-playing {
  padding: var(--space-3) var(--space-4);
  background: var(--color-bg-alt);
  border-radius: var(--radius-sm);
  margin-bottom: var(--space-4);
}

.audio-now-info {
  display: flex;
  align-items: center;
  gap: var(--space-3);
  margin-bottom: var(--space-3);
}

.audio-now-label {
  font-size: 0.72rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  color: var(--color-primary);
  flex-shrink: 0;
}

.audio-now-title {
  font-size: 0.88rem;
  font-weight: 600;
  color: var(--color-text);
  min-width: 0;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.audio-guide-progress-wrap {
  position: relative;
  height: 26px;
  display: flex;
  align-items: center;
  margin-bottom: var(--space-2);
  cursor: pointer;
}

.audio-seek-track {
  position: absolute;
  left: 0; right: 0;
  height: 6px;
  border-radius: 3px;
  background: var(--color-border);
  overflow: hidden;
  pointer-events: none;
}

.audio-seek-fill {
  height: 100%;
  width: 0;
  background: var(--color-primary);
  border-radius: 3px;
  transition: width 0.15s linear;
}

.audio-guide-seek {
  -webkit-appearance: none;
  appearance: none;
  position: relative;
  width: 100%;
  height: 26px;
  background: transparent;
  outline: none;
  cursor: pointer;
  margin: 0;
  padding: 0;
  touch-action: none;
  z-index: 1;
}

.audio-guide-seek::-webkit-slider-runnable-track {
  height: 6px;
  border-radius: 3px;
  background: transparent;
}

.audio-guide-seek::-moz-range-track {
  height: 6px;
  border-radius: 3px;
  background: transparent;
}

.audio-guide-seek::-webkit-slider-thumb {
  -webkit-appearance: none;
  width: 16px;
  height: 16px;
  border-radius: 50%;
  background: var(--color-primary);
  cursor: pointer;
  border: 2px solid #fff;
  box-shadow: 0 1px 4px rgba(0,0,0,.18);
  margin-top: -5px;
}

.audio-guide-time {
  font-size: 0.78rem;
  color: var(--color-text-muted);
  font-variant-numeric: tabular-nums;
}

.audio-guide-ctrl-row {
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: var(--space-2);
}

.audio-guide-ctrl-row.standalone {
  display: none;
}

.audio-guide-ctrl-btns {
  display: flex;
  align-items: center;
  gap: var(--space-2);
}

.audio-guide-mode-btn {
  min-height: var(--touch-target-sm);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-sm);
  background: var(--color-bg-alt);
  color: var(--color-text-secondary);
  font-size: 0.78rem;
  font-weight: 600;
  padding: var(--space-1) var(--space-3);
  cursor: pointer;
  transition: var(--transition);
  flex-shrink: 0;
}

.audio-guide-speed-btn {
  min-height: var(--touch-target-sm);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-sm);
  background: var(--color-bg-alt);
  color: var(--color-text-secondary);
  font-size: 0.82rem;
  font-weight: 600;
  padding: var(--space-1) var(--space-3);
  cursor: pointer;
  transition: var(--transition);
  flex-shrink: 0;
}

/* === Segment List === */
.audio-seg-list {
  display: flex;
  flex-direction: column;
  gap: 2px;
}

.audio-seg-item {
  display: flex;
  align-items: center;
  gap: var(--space-3);
  padding: var(--space-3) var(--space-3);
  border-radius: var(--radius-sm);
  transition: var(--transition);
}

.audio-seg-item.active {
  background: rgba(var(--color-primary-rgb), 0.08);
}

.audio-seg-item.excluded {
  opacity: 0.45;
}

.audio-seg-play {
  width: var(--touch-target-sm);
  height: var(--touch-target-sm);
  border: 1px solid var(--color-border);
  border-radius: 50%;
  background: var(--color-bg-alt);
  color: var(--color-text-secondary);
  font-size: 0.82rem;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
  transition: var(--transition);
}

.audio-seg-item.active .audio-seg-play {
  background: var(--color-primary);
  color: #fff;
  border-color: var(--color-primary);
}

.audio-seg-play:disabled {
  opacity: 0.3;
  cursor: not-allowed;
}

.audio-seg-title {
  flex: 1;
  font-size: 0.9rem;
  color: var(--color-text);
  min-width: 0;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

/* Toggle switch (keep existing) */
.audio-seg-toggle {
  position: relative;
  width: 38px;
  height: 22px;
  flex-shrink: 0;
}

.audio-seg-toggle input {
  opacity: 0;
  width: 0;
  height: 0;
  position: absolute;
}

.audio-seg-toggle-slider {
  position: absolute;
  inset: 0;
  background: var(--color-border);
  border-radius: 11px;
  cursor: pointer;
  transition: var(--transition);
}

.audio-seg-toggle-slider::before {
  content: '';
  position: absolute;
  width: 16px;
  height: 16px;
  left: 3px;
  top: 3px;
  background: #fff;
  border-radius: 50%;
  transition: var(--transition);
}

.audio-seg-toggle input:checked + .audio-seg-toggle-slider {
  background: var(--color-primary);
}

.audio-seg-toggle input:checked + .audio-seg-toggle-slider::before {
  transform: translateX(16px);
}

/* === Audio Mini Player (floating, when navigating away) === */
.audio-mini-player {
  position: fixed;
  bottom: max(96px, calc(env(safe-area-inset-bottom, 0px) + 80px));
  right: var(--space-4);
  z-index: 9997;
  display: flex;
  align-items: center;
  gap: var(--space-3);
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: var(--space-3) var(--space-4);
  box-shadow: var(--shadow-lg);
  max-width: 320px;
  opacity: 0;
  transform: translateY(16px) scale(0.95);
  pointer-events: none;
  transition: opacity 0.25s ease, transform 0.25s ease;
}

.audio-mini-player.visible {
  opacity: 1;
  transform: translateY(0) scale(1);
  pointer-events: auto;
}

.audio-mini-play,
.audio-mini-close {
  width: var(--touch-target-sm);
  height: var(--touch-target-sm);
  border: none;
  border-radius: 50%;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1rem;
  flex-shrink: 0;
  transition: var(--transition);
}

.audio-mini-play {
  background: var(--color-primary);
  color: #fff;
}

.audio-mini-play svg,
.audio-mini-close svg {
  width: 16px;
  height: 16px;
}

.audio-mini-close {
  background: var(--color-bg-alt);
  color: var(--color-text-muted);
  font-size: 0.85rem;
}

.audio-mini-info {
  flex: 1;
  min-width: 0;
}

.audio-mini-title {
  display: block;
  font-size: 0.82rem;
  font-weight: 600;
  color: var(--color-text);
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
  margin-bottom: 4px;
}

.audio-mini-bar-wrap {
  width: 100%;
  height: 4px;
  background: var(--color-border);
  border-radius: 2px;
  overflow: hidden;
  cursor: pointer;
  /* Expand touch target */
  padding: 8px 0;
  margin: -8px 0;
  background-clip: content-box;
}

.audio-mini-bar {
  height: 100%;
  width: 0;
  background: var(--color-primary);
  border-radius: 2px;
  transition: width 0.3s linear;
}

/* Mobile adjustments */
@media (max-width: 480px) {
  .audio-guide-card {
    padding: var(--space-4);
  }
  .audio-guide-desc {
    font-size: 0.85rem;
  }
  .audio-guide-header {
    flex-wrap: wrap;
  }
  .audio-seg-title {
    font-size: 0.85rem;
  }
  .audio-inline-play {
    width: var(--touch-target-sm);
    height: var(--touch-target-sm);
    margin-right: var(--space-2);
  }
  .audio-inline-play svg {
    width: 18px;
    height: 18px;
  }
  .audio-mini-player {
    left: var(--space-3);
    right: var(--space-3);
    max-width: none;
    bottom: max(86px, calc(env(safe-area-inset-bottom, 0px) + 72px));
  }
}