.bubble-button {
    position: relative;
    display: inline-block;
    padding: 15px 30px;
    background-color: #0000FF;
    color: #fff;
    text-decoration: none;
    border-radius: 30px;
    font-weight: bold;
    transition: all 0.3s ease;
    cursor: pointer;
}

.bubble-button:hover {
    border-bottom-right-radius: 0;
}

.bubble-button::after {
    content: '';
    position: absolute;
    bottom: -20px;
    right: 0;
    border-width: 0 20px 20px 0;
    border-style: solid;
    border-color: transparent #0000FF transparent transparent;
    opacity: 0;
    transition: all 0.3s ease;
    transform: translateY(-10px);
}

.bubble-button:hover::after {
    opacity: 1;
    transform: translateY(0);
}