/* Play Circle - frosted glass play button with transition states */
.play-circle {
  position: absolute;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  width: 48px;
  height: 48px;
  border-radius: 50%;
  background: rgba(255, 255, 255, 0.7);
  backdrop-filter: blur(8px);
  -webkit-backdrop-filter: blur(8px);
  border: 1px solid rgba(74, 85, 104, 0.15);
  color: #4a5568;
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  transition: all 0.3s ease;
  z-index: 10;
}

.play-circle:hover {
  background: rgba(255, 255, 255, 0.85);
  border-color: rgba(74, 85, 104, 0.3);
  box-shadow: 0 4px 12px rgba(74, 85, 104, 0.15);
  transform: translate(-50%, -50%) scale(1.05);
}

.play-circle:active {
  transform: translate(-50%, -50%) scale(0.95);
}

.play-circle.shrinking {
  width: 5px;
  height: 5px;
  background: currentColor;
  border: none;
  box-shadow: 0 0 10px currentColor;
}

.play-circle.shrinking svg {
  display: none;
}

.play-circle.stretching {
  width: 100%;
  height: 5px;
  border-radius: 2px;
  background: currentColor;
  border: none;
  box-shadow: 0 0 10px currentColor;
}

.play-circle.stretching svg {
  display: none;
}

.play-circle.fade-out {
  opacity: 0;
}