body, html {
    margin: 0;
    padding: 0;
    width: 100%;
    height: 100%;
    overflow: hidden;
}

#container {
    position: relative;
    width: 100%;
    height: 100%;
    background-color: white;
    cursor: pointer;
}

.disk {
    position: absolute;
    border-radius: 50%;
    animation: expand 15s cubic-bezier(0.2, 0, 0.8, 1) forwards;
}

@keyframes expand {
    0% {
        transform: scale(0.1);
    }
    50% {
        background-color: rgba(0, 0, 0, 0.5);
    }
    100% {
        transform: scale(100);
        background-color: rgba(255, 255, 255, 1);
    }
}