/* ========================================
   A/B Audio Player Component
   ======================================== */

.audio-player {
  display: flex;
  flex-direction: column;
  align-items: center;
  padding: var(--spacing-xl);
  background-color: var(--color-white);
  border-radius: var(--radius-xl);
  box-shadow: var(--shadow-lg);
  max-width: 280px;
  margin: 0 auto;
}

/* Circular Progress Container */
.audio-player-circle {
  position: relative;
  width: 160px;
  height: 160px;
  cursor: pointer;
}

/* SVG Progress Ring */
.audio-player-svg {
  width: 100%;
  height: 100%;
  transform: rotate(-90deg);
}

.audio-player-track {
  fill: none;
  stroke: var(--color-light-gray);
  stroke-width: 8;
}

.audio-player-progress {
  fill: none;
  stroke: url(#playerGradient);
  stroke-width: 8;
  stroke-linecap: round;
  stroke-dasharray: 452; /* 2 * PI * 72 (radius) */
  stroke-dashoffset: 452;
  transition: stroke-dashoffset 0.1s linear;
}

/* Play/Pause Button in Center */
.audio-player-control {
  position: absolute;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  width: 64px;
  height: 64px;
  border-radius: 50%;
  background: var(--gradient-brand);
  border: none;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  box-shadow: var(--shadow-md);
  transition: transform var(--transition-fast), box-shadow var(--transition-fast);
}

.audio-player-control:hover {
  transform: translate(-50%, -50%) scale(1.05);
  box-shadow: var(--shadow-lg);
}

.audio-player-control:active {
  transform: translate(-50%, -50%) scale(0.98);
}

.audio-player-control svg {
  width: 24px;
  height: 24px;
  fill: var(--color-white);
}

/* Play icon offset for visual centering */
.audio-player-control .icon-play {
  margin-left: 3px;
}

.audio-player-control .icon-pause {
  display: none;
}

.audio-player.playing .audio-player-control .icon-play {
  display: none;
}

.audio-player.playing .audio-player-control .icon-pause {
  display: block;
}

/* Time Display */
.audio-player-time {
  margin-top: var(--spacing-md);
  font-size: var(--font-size-sm);
  color: var(--color-text-muted);
  font-variant-numeric: tabular-nums;
}

/* A/B Toggle */
.audio-player-toggle {
  display: flex;
  align-items: center;
  gap: var(--spacing-sm);
  margin-top: var(--spacing-lg);
  padding: var(--spacing-xs);
  background-color: var(--color-light-gray);
  border-radius: var(--radius-full);
}

.audio-player-toggle-btn {
  padding: var(--spacing-sm) var(--spacing-lg);
  font-size: var(--font-size-sm);
  font-weight: var(--font-weight-semibold);
  border: none;
  border-radius: var(--radius-full);
  cursor: pointer;
  transition: all var(--transition-fast);
  background-color: transparent;
  color: var(--color-text-muted);
}

.audio-player-toggle-btn.active {
  background: var(--gradient-brand);
  color: var(--color-white);
  box-shadow: var(--shadow-sm);
}

.audio-player-toggle-btn:not(.active):hover {
  color: var(--color-text-dark);
}

/* Song Name */
.audio-player-song {
  margin-top: var(--spacing-lg);
  font-size: var(--font-size-base);
  font-weight: var(--font-weight-semibold);
  color: var(--color-text-dark);
  text-align: center;
}

.audio-player-label {
  font-size: var(--font-size-xs);
  color: var(--color-text-muted);
  text-transform: uppercase;
  letter-spacing: 0.05em;
  margin-top: var(--spacing-xs);
}

/* Audio Players Grid */
.audio-players-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
  gap: var(--spacing-xl);
  justify-items: center;
}

/* Loading State */
.audio-player.loading .audio-player-control {
  opacity: 0.7;
  pointer-events: none;
}

.audio-player.loading .audio-player-control::after {
  content: '';
  position: absolute;
  width: 24px;
  height: 24px;
  border: 2px solid transparent;
  border-top-color: var(--color-white);
  border-radius: 50%;
  animation: spin 0.8s linear infinite;
}

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

/* Disabled State */
.audio-player.disabled {
  opacity: 0.5;
  pointer-events: none;
}

/* Responsive */
@media (max-width: 767px) {
  .audio-player {
    padding: var(--spacing-lg);
    max-width: 240px;
  }

  .audio-player-circle {
    width: 140px;
    height: 140px;
  }

  .audio-player-control {
    width: 56px;
    height: 56px;
  }

  .audio-player-control svg {
    width: 20px;
    height: 20px;
  }

  .audio-players-grid {
    grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
    gap: var(--spacing-lg);
  }
}

/* Focus States for Accessibility */
.audio-player-control:focus {
  outline: 3px solid var(--color-cyan);
  outline-offset: 3px;
}

.audio-player-toggle-btn:focus {
  outline: 2px solid var(--color-cyan);
  outline-offset: 2px;
}

/* Dark Mode Variant (for dark sections) */
.section-dark .audio-player {
  background-color: rgba(255, 255, 255, 0.05);
  backdrop-filter: blur(10px);
}

.section-dark .audio-player-track {
  stroke: rgba(255, 255, 255, 0.1);
}

.section-dark .audio-player-toggle {
  background-color: rgba(255, 255, 255, 0.1);
}

.section-dark .audio-player-toggle-btn {
  color: rgba(255, 255, 255, 0.6);
}

.section-dark .audio-player-toggle-btn:not(.active):hover {
  color: var(--color-white);
}

.section-dark .audio-player-song {
  color: var(--color-white);
}

.section-dark .audio-player-time,
.section-dark .audio-player-label {
  color: rgba(255, 255, 255, 0.6);
}

/* ========================================
   Progression Audio Player Component
   4-stage demo: Raw > VocalIQ > VocalIQ+Music > VocalIQ+SpatialIQ
   ======================================== */

.progression-player {
  display: flex;
  flex-direction: column;
  align-items: center;
  padding: var(--spacing-xl);
  background-color: var(--color-white);
  border-radius: var(--radius-xl);
  box-shadow: var(--shadow-lg);
  max-width: 380px;
  margin: 0 auto;
}

/* Circular Progress Container */
.progression-player-circle {
  position: relative;
  width: 160px;
  height: 160px;
  cursor: pointer;
}

/* SVG Progress Ring */
.progression-player-svg {
  width: 100%;
  height: 100%;
  transform: rotate(-90deg);
}

.progression-player-track {
  fill: none;
  stroke: var(--color-light-gray);
  stroke-width: 8;
}

.progression-player-progress {
  fill: none;
  stroke: url(#progressionGradient);
  stroke-width: 8;
  stroke-linecap: round;
  stroke-dasharray: 452;
  stroke-dashoffset: 452;
  transition: stroke-dashoffset 0.1s linear;
}

/* Play/Pause Button in Center */
.progression-player-control {
  position: absolute;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  width: 64px;
  height: 64px;
  border-radius: 50%;
  background: var(--gradient-brand);
  border: none;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  box-shadow: var(--shadow-md);
  transition: transform var(--transition-fast), box-shadow var(--transition-fast);
}

.progression-player-control:hover {
  transform: translate(-50%, -50%) scale(1.05);
  box-shadow: var(--shadow-lg);
}

.progression-player-control:active {
  transform: translate(-50%, -50%) scale(0.98);
}

.progression-player-control svg {
  width: 24px;
  height: 24px;
  fill: var(--color-white);
}

.progression-player-control .icon-play {
  margin-left: 3px;
}

.progression-player-control .icon-pause {
  display: none;
}

.progression-player.playing .progression-player-control .icon-play {
  display: none;
}

.progression-player.playing .progression-player-control .icon-pause {
  display: block;
}

/* Time Display */
.progression-player-time {
  margin-top: var(--spacing-md);
  font-size: var(--font-size-sm);
  color: var(--color-text-muted);
  font-variant-numeric: tabular-nums;
}

/* 4-Stage Toggle */
.progression-player-toggle {
  display: flex;
  flex-wrap: nowrap;
  align-items: center;
  justify-content: center;
  gap: var(--spacing-xs);
  margin-top: var(--spacing-lg);
  padding: var(--spacing-xs);
  background-color: var(--color-light-gray);
  border-radius: var(--radius-lg);
}

.progression-toggle-btn {
  padding: var(--spacing-xs) var(--spacing-md);
  font-size: var(--font-size-xs);
  font-weight: var(--font-weight-semibold);
  border: none;
  border-radius: var(--radius-md);
  cursor: pointer;
  transition: all var(--transition-fast);
  background-color: transparent;
  color: var(--color-text-muted);
  white-space: nowrap;
}

.progression-toggle-btn.active {
  background: var(--gradient-brand);
  color: var(--color-white);
  box-shadow: var(--shadow-sm);
}

.progression-toggle-btn:not(.active):hover {
  color: var(--color-text-dark);
  background-color: rgba(0, 0, 0, 0.05);
}

/* Song Name */
.progression-player-song {
  margin-top: var(--spacing-lg);
  font-size: var(--font-size-base);
  font-weight: var(--font-weight-semibold);
  color: var(--color-text-dark);
  text-align: center;
}

.progression-player-label {
  font-size: var(--font-size-xs);
  color: var(--color-text-muted);
  text-transform: uppercase;
  letter-spacing: 0.05em;
  margin-top: var(--spacing-xs);
}

/* Progression Players Grid */
.progression-players-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(380px, 1fr));
  gap: var(--spacing-xl);
  justify-items: center;
}

/* Loading State */
.progression-player.loading .progression-player-control {
  opacity: 0.7;
  pointer-events: none;
}

.progression-player.loading .progression-player-control::after {
  content: '';
  position: absolute;
  width: 24px;
  height: 24px;
  border: 2px solid transparent;
  border-top-color: var(--color-white);
  border-radius: 50%;
  animation: spin 0.8s linear infinite;
}

/* Responsive */
@media (max-width: 767px) {
  .progression-player {
    padding: var(--spacing-lg);
    max-width: 340px;
  }

  .progression-player-circle {
    width: 140px;
    height: 140px;
  }

  .progression-player-control {
    width: 56px;
    height: 56px;
  }

  .progression-player-control svg {
    width: 20px;
    height: 20px;
  }

  .progression-player-toggle {
    gap: 4px;
    padding: 4px;
  }

  .progression-toggle-btn {
    padding: 6px 8px;
    font-size: 10px;
  }

  .progression-players-grid {
    grid-template-columns: 1fr;
    gap: var(--spacing-lg);
  }
}

/* Focus States for Accessibility */
.progression-player-control:focus {
  outline: 3px solid var(--color-cyan);
  outline-offset: 3px;
}

.progression-toggle-btn:focus {
  outline: 2px solid var(--color-cyan);
  outline-offset: 2px;
}

/* Dark Mode Variant */
.section-dark .progression-player {
  background-color: rgba(255, 255, 255, 0.05);
  backdrop-filter: blur(10px);
}

.section-dark .progression-player-track {
  stroke: rgba(255, 255, 255, 0.1);
}

.section-dark .progression-player-toggle {
  background-color: rgba(255, 255, 255, 0.1);
}

.section-dark .progression-toggle-btn {
  color: rgba(255, 255, 255, 0.6);
}

.section-dark .progression-toggle-btn:not(.active):hover {
  color: var(--color-white);
  background-color: rgba(255, 255, 255, 0.1);
}

.section-dark .progression-player-song {
  color: var(--color-white);
}

.section-dark .progression-player-time,
.section-dark .progression-player-label {
  color: rgba(255, 255, 255, 0.6);
}