Fylo data storage component

I'm happy with the way I made my triangle. I used ::after on the bubble.

.space-left-bubble::after {
    content: " ";
    position: absolute;
    bottom: 0;
    right: 0;
    height: 15px;
    width: 15px;

    /* triangle part */
    --size-triangle: 20px;
    border-top: var(--size-triangle) solid white;
    border-left: var(--size-triangle) solid transparent;
    transform: translateY(var(--size-triangle));
}