.bubble-container {
  position: fixed;
  width: 100vw;
  height: 100vh;
  top: 0;
  left: 0;
  z-index: -1;
  background: rgb(62, 30, 104);
  overflow: hidden;
}

.bubble {
  position: absolute;
  bottom: -60px;
  border-radius: 50%;
  pointer-events: none;
  mix-blend-mode: screen;
  filter: blur(1px);

  /* Only one animation using combined transform */
  animation: floatZig 10s linear infinite;
}

/* Bubble rises upward */
@keyframes floatZig {
  0% {
    transform: translate(0, 0) scale(1);
    opacity: 1;
  }
  25% {
    transform: translate(-10px, -30vh) scale(1.1);
  }
  50% {
    transform: translate(10px, -60vh) scale(1.2);
  }
  75% {
    transform: translate(-6px, -90vh) scale(1.3);
  }
  100% {
    transform: translate(0, -120vh) scale(1.5);
    opacity: 0;
  }
}

/* Bubble zigzags horizontally while rising */
@keyframes zigzag {
  0%   { transform: translateX(0); }
  25%  { transform: translateX(-10px); }
  50%  { transform: translateX(10px); }
  75%  { transform: translateX(-6px); }
  100% { transform: translateX(0); }
}