.bubble {
    border-radius: calc(2.75rem);
    width: 2.75rem;
    height: 2.75rem;
    display: inline-grid;
}

.bubbles-box {
    max-width: 100%;
    vertical-align: middle;
    text-align: center;
    padding-top: 25px;
}

.bubble_holder {
    display: inline-block;
    width: 3rem;
    height: 3rem;
}