body {
    margin: 0;
    display: flex;
    justify-content: center;
    align-items: center;
    min-height: 100vh;
    background: linear-gradient(135deg, #f5f7fa 0%, #c3cfe2 100%);
    font-family: monospace;
    font-size: 12px;
}

#start-overlay {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    display: flex;
    justify-content: center;
    align-items: center;
    cursor: pointer;
    z-index: 1000;
}

.start-text {
    font-size: 1.2em;
    color: rgba(0, 0, 0, 0.5);
    font-weight: 300;
}

#bubble-container {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    overflow: hidden;
}

.bubble {
    width: 100px;
    height: 100px;
    border-radius: 50%;
    background: linear-gradient(135deg, #FFFED1, #DEFFE5, #EADEFF, #E3E3E3);
    position: absolute;
    pointer-events: none;
    will-change: transform, opacity;
    box-shadow: 0 0 20px rgba(255, 255, 255, 0.3);
    transition: opacity 0.3s ease-out;
    transform-origin: center center;
}