.message-bubble {
    position: absolute;

    right: 0;
    bottom: calc(100% + 12px);

    max-width: 280px;
    padding: 12px 16px;

    background: #000000;
    color: #FFFFFF;

    border: 2px solid #07B2F9;
    border-radius: 16px;

    font-size: 14px;
    line-height: 1.4;
    text-align: center;

    box-shadow: 3px 3px 0 #000000;

    opacity: 0;
    visibility: hidden;

    transform: translateY(8px) scale(0.95);
    transform-origin: bottom right;

    transition:
        opacity 0.2s ease,
        transform 0.2s ease;

    z-index: 100;
}

.message-bubble::after {
    content: "";

    position: absolute;

    right: 12px;
    bottom: -10px;

    width: 16px;
    height: 16px;

    background: #000000;

    border-right: 2px solid #07B2F9;
    border-bottom: 2px solid #07B2F9;

    transform: rotate(45deg);
}

.message-bubble.show {
    opacity: 1;
    visibility: visible;

    transform: translateY(0) scale(1);
}