:root {
    --ripple-color: #fff;
    --ripple-radius: 9999px;
    --ripple-duration: 600ms;
    --ripple-timing-function: linear;
    --ripple-focus-duration: 2500ms;
    --ripple-focus-timing-function: ease-in-out;
    --ripple-focus-delay: 200ms;
}

.ripple {
    position: absolute;
    top: 0;
    left: 0;
    bottom: 0;
    right: 0;
    overflow: hidden;
    pointer-events: none;
    border-radius: inherit;
}

.ripple span {
    position: absolute;
    border-radius: var(--ripple-radius);
    opacity: 0.5;
    background: var(--ripple-color);
    transform: scale(0);
    animation: ripple var(--ripple-duration) var(--ripple-timing-function);
}

.ripple-focus {
    overflow: hidden;
    pointer-events: none;
    position: absolute;
    z-index: 0;
    border-radius: inherit;
    inset: 0;
}

.ripple-focus-child {
    position: absolute;
    opacity: 0.3;
    border-radius: 50%;
    background: var(--ripple-focus-color, var(--ripple-color));
    transform: scale(1);
    animation: ripple-pulsate var(--ripple-focus-duration) var(--ripple-focus-timing-function) infinite var(--ripple-focus-delay);
}

.ripple-focus-child > span {
    position: absolute;
    top: 0;
    left: 0;
    display: block;
    width: 100%;
    height: 100%;
    border-radius: 50%;
}

@keyframes ripple {
    to {
        transform: scale(4);
        opacity: 0;
    }
}

@keyframes ripple-pulsate {
    0% {
        transform: scale(1);
    }
    50% {
        transform: scale(.92);
    }
    100% {
        transform: scale(1);
    }
}