body {
    margin: 0;
    padding: 0;
    background-color: #0a192f;
    overflow: hidden;
}

.bubble-container {
    position: absolute;
    width: 100%;
    height: 100%;
    overflow: hidden;
}

.bubble {
    position: absolute;
    bottom: 0;
    background-color: rgba(173, 216, 230, 0.7);
    border-radius: 50%;
    animation: bubbleAnimation 5s linear infinite;
}

@keyframes bubbleAnimation {
    0% {
        transform: translateY(0);
        opacity: 1;
    }
    100% {
        transform: translateY(-100vh);
        opacity: 0;
    }
}