/* CSS para animaciones de burbujas */
.bubble-container {
  position: absolute;
  width: 100%;
  height: 100%;
  pointer-events: none;
  overflow: hidden;
}

.bubble {
  position: absolute;
  bottom: -20px;
  width: 20px;
  height: 20px;
  background: radial-gradient(circle, rgba(255, 255, 255, 0.8) 0%, rgba(255, 255, 255, 0.3) 70%, transparent 100%);
  border-radius: 50%;
  animation: riseAndRotate 6s ease-in-out infinite;
}

.bubble::after {
  content: '';
  position: absolute;
  top: 25%;
  left: 25%;
  width: 50%;
  height: 50%;
  background: radial-gradient(circle, rgba(255, 255, 255, 0.9) 0%, transparent 70%);
  border-radius: 50%;
}

@keyframes riseAndRotate {
  0% {
    transform: translateY(0) rotate(0deg) scale(0);
    opacity: 0;
  }
  10% {
    opacity: 1;
    transform: translateY(-10px) rotate(36deg) scale(1);
  }
  90% {
    opacity: 1;
  }
  100% {
    transform: translateY(-300px) rotate(360deg) scale(0.5);
    opacity: 0;
  }
}

/* Variaciones de burbujas */
.bubble:nth-child(1) {
  animation-delay: 0s;
  animation-duration: 5s;
}

.bubble:nth-child(2) {
  animation-delay: 2s;
  animation-duration: 7s;
}

.bubble:nth-child(3) {
  animation-delay: 4s;
  animation-duration: 6s;
}

.bubble:nth-child(4) {
  animation-delay: 1.5s;
  animation-duration: 8s;
}