.beefup {
    border: 1px solid #ddd;
    border-radius: 4px;
    margin: 1em 0;
    -webkit-transition: border .2s ease;
    transition: border .2s ease;
}

.beefup:first-child {
    margin-top: 0;
}

.beefup:hover {
    border-color: #aaa;
}

.beefup__head, .beefup__body {
    padding: 10px 20px;
}

.beefup__head {
    cursor: pointer;
    margin: 0;
    overflow: hidden;
    padding-right: 50px;
    position: relative;
    text-overflow: ellipsis;
    white-space: nowrap;
}

.beefup__head::after {
    border-style: solid;
    border-width: 10px 10px 0;
    border-color: #ddd transparent transparent;
    content: '';
    position: absolute;
    right: 20px;
    height: 0;
    margin-top: -5px;
    top: 50%;
    -webkit-transition: border .2s ease;
    transition: border .2s ease;
    width: 0;
}

.beefup__body {
    padding-top: 20px;
}

.beefup.is-open > .beefup__head::after {
    border-width: 0 10px 10px;
    border-color: transparent transparent #ddd;
}