body {
  background: #ffff00;
  margin: 0;
}


.bubbles {
  position: relative;
  width: 100%;
  height: 100vh;
  overflow: hidden;
}

.bubble {
  position: absolute;
  left: var(--bubble-left-offset);
  bottom: -75%;
  display: block;
  width: var(--bubble-radius);
  height: var(--bubble-radius);
  border-radius: 50%;
  animation: float-up var(--bubble-float-duration) var(--bubble-float-delay) ease-in infinite;
}
.bubble::before {
  position: absolute;
  content: "";
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
 // background: rgba(136, 246, 251, 0.3);
  background: rgba(255, 255, 0, 0.3);
  border-radius: inherit;
  animation: var(--bubble-sway-type) var(--bubble-sway-duration) var(--bubble-sway-delay) ease-in-out alternate infinite;
}
.bubble:nth-child(0) {
  --bubble-left-offset: 35vw;
  --bubble-radius: 7vw;
  --bubble-float-duration: 10s;
  --bubble-sway-duration: 5s;
  --bubble-float-delay: 4s;
  --bubble-sway-delay: 4s;
  --bubble-sway-type: sway-right-to-left;
}
.bubble:nth-child(1) {
  --bubble-left-offset: 40vw;
  --bubble-radius: 10vw;
  --bubble-float-duration: 10s;
  --bubble-sway-duration: 4s;
  --bubble-float-delay: 0s;
  --bubble-sway-delay: 3s;
  --bubble-sway-type: sway-left-to-right;
}
.bubble:nth-child(2) {
  --bubble-left-offset: 89vw;
  --bubble-radius: 2vw;
  --bubble-float-duration: 6s;
  --bubble-sway-duration: 6s;
  --bubble-float-delay: 2s;
  --bubble-sway-delay: 2s;
  --bubble-sway-type: sway-right-to-left;
}
.bubble:nth-child(3) {
  --bubble-left-offset: 86vw;
  --bubble-radius: 3vw;
  --bubble-float-duration: 8s;
  --bubble-sway-duration: 5s;
  --bubble-float-delay: 4s;
  --bubble-sway-delay: 4s;
  --bubble-sway-type: sway-right-to-left;
}
.bubble:nth-child(4) {
  --bubble-left-offset: 52vw;
  --bubble-radius: 9vw;
  --bubble-float-duration: 9s;
  --bubble-sway-duration: 5s;
  --bubble-float-delay: 3s;
  --bubble-sway-delay: 2s;
  --bubble-sway-type: sway-left-to-right;
}
.bubble:nth-child(5) {
  --bubble-left-offset: 55vw;
  --bubble-radius: 10vw;
  --bubble-float-duration: 7s;
  --bubble-sway-duration: 4s;
  --bubble-float-delay: 4s;
  --bubble-sway-delay: 0s;
  --bubble-sway-type: sway-left-to-right;
}
.bubble:nth-child(6) {
  --bubble-left-offset: 62vw;
  --bubble-radius: 10vw;
  --bubble-float-duration: 9s;
  --bubble-sway-duration: 4s;
  --bubble-float-delay: 1s;
  --bubble-sway-delay: 3s;
  --bubble-sway-type: sway-right-to-left;
}
.bubble:nth-child(7) {
  --bubble-left-offset: 61vw;
  --bubble-radius: 7vw;
  --bubble-float-duration: 8s;
  --bubble-sway-duration: 4s;
  --bubble-float-delay: 1s;
  --bubble-sway-delay: 3s;
  --bubble-sway-type: sway-right-to-left;
}
.bubble:nth-child(8) {
  --bubble-left-offset: 21vw;
  --bubble-radius: 4vw;
  --bubble-float-duration: 9s;
  --bubble-sway-duration: 6s;
  --bubble-float-delay: 3s;
  --bubble-sway-delay: 4s;
  --bubble-sway-type: sway-right-to-left;
}
.bubble:nth-child(9) {
  --bubble-left-offset: 75vw;
  --bubble-radius: 8vw;
  --bubble-float-duration: 7s;
  --bubble-sway-duration: 5s;
  --bubble-float-delay: 0s;
  --bubble-sway-delay: 3s;
  --bubble-sway-type: sway-right-to-left;
}
.bubble:nth-child(10) {
  --bubble-left-offset: 9vw;
  --bubble-radius: 8vw;
  --bubble-float-duration: 11s;
  --bubble-sway-duration: 4s;
  --bubble-float-delay: 0s;
  --bubble-sway-delay: 1s;
  --bubble-sway-type: sway-right-to-left;
}

@keyframes float-up {
  to {
    transform: translateY(-175vh);
  }
}
@keyframes sway-left-to-right {
  from {
    transform: translateX(-100%);
  }
  to {
    transform: translateX(100%);
  }
}
@keyframes sway-right-to-left {
  from {
    transform: translateX(100%);
  }
  to {
    transform: translateX(-100%);
  }
}