styles.css

.code-review {
    position: relative;
    cursor: default;
}

.code-review .tooltiptext {
    visibility: hidden;
    width: 120px;
    background-color: black;
    color: #fff;
    text-align: center;
    padding: 5px 0;
    border-radius: 6px;
    position: absolute;
    z-index: 200;
    width: 120px;
    top: 30px;
    left: 50%;
    margin-left: -60px;
}

.code-review:hover .tooltiptext {
    visibility: visible;
}

.code-review .tooltiptext::after {
    content: " ";
    position: absolute;
    bottom: 100%;
    /* At the top of the tooltip */
    left: 50%;
    margin-left: -5px;
    border-width: 5px;
    border-style: solid;
    border-color: transparent transparent black transparent;
}

.pullRequestNode {
    margin-bottom: 5px;
}

.pullRequestNode:last-child {
    margin-bottom: 0px;
}

.pull-request-label {
    margin-top: 3px;
    height: 20px;
    padding: 0.15em 4px;
    font-size: 12px;
    font-weight: 600 line-height:15px;
    border-radius: 2px;
}

.repo-name {
    font-size: 10px;
    font-style: italic;
    padding-left: 5px;
}

.pr-heading {
    border-bottom: 2px solid #dfe1e6;
    color: #6c798f;
    font-weight: 500;
    font-size: 12px;
    margin-bottom: 5px;
}