[data-controller="hello"] {
    position: relative;
    display: inline-block;
    padding: 20px 40px;
    background: #222;
    color: white;
    border-radius: 12px;
    font-family: sans-serif;
    text-align: center;
    user-select: none;
}

.particle {
    position: absolute;
    width: 8px;
    height: 8px;
    border-radius: 50%;
    pointer-events: none;
}