.is-collapsed {
    display: none;
}

.collapser {
    color: var(--secondary-color);
    font-weight: bold;
    background: transparent;
    border: none;

    display: inline-flex;
    align-items: center;
    justify-content: center;

    margin-right: 0px;
    padding-right: 0px;
    cursor: pointer;

    font-size: 1em;
    line-height: 1;
}