.collapse-control img.indicator {
    width: 25px;
    height: 15px;
    transform: rotate(-90deg);
    transition: transform 0.5s cubic-bezier(0, 1, 0, 1);
    z-index: 0;
}

.collapse-control.opened img.indicator {
    transform: rotate(0deg);
}

.collapsed {
    display: block;
    max-height: 0px;
    overflow: hidden;
    transition: max-height 0.5s cubic-bezier(0, 1, 0, 1);
}
.collapsed.opened {
    max-height: 99em;
    transition: max-height 0.5s ease-in-out;
}