.maintext-kolca-collapsible__content {
    position: relative;
    max-height: 260px;
    overflow: hidden;
}

.maintext-kolca-collapsible__content::after {
    content: "";
    position: absolute;
    right: 0;
    bottom: 0;
    left: 0;

    height: 60px;

    pointer-events: none;

    background: linear-gradient(
        to bottom,
        rgba(255, 255, 255, 0),
        #fff
    );
}

.maintext-kolca-collapsible.is-open
.maintext-kolca-collapsible__content {
    max-height: none;
}

.maintext-kolca-collapsible.is-open
.maintext-kolca-collapsible__content::after {
    display: none;
}

.maintext-kolca-collapsible__toggle {
    display: block;

    margin: 20px auto 0;

    cursor: pointer;
}