.complexica-pagesection {
    display: flex;
    min-height: 20px;
    margin: 12px;
    border-radius: 2px;
    box-shadow: 1px 1px 3px #ccc;
    background-color: #fff;
}

.complexica-pagesection a.complexica-pagesection-expander {
    display: block;
    width: 50px;
    height: 15px;
    position: absolute;
    z-index: 1;
    margin: 0 auto;
    left: 0;
    right: 0;
    border-radius: 0 0 6px 6px;
    opacity: .15;
    transition: .2s all linear;
    background-position: 0 -5px;
}

@media (-webkit-min-device-pixel-ratio: 2), (min-resolution: 192dpi) {
    .complexica-pagesection a.complexica-pagesection-expander {
        background-size: 100%;
    }
}

.complexica-pagesection a.complexica-pagesection-expander:hover {
    height: 20px;
    opacity: .3;
    background-position: 0 0;
    transition: .2s all linear;
}

.complexica-pagesection a.complexica-pagesection-expander.complexica-pagesection-expander-collapsed {
    background-image: url("../images/expand-down-button.png");
}

@media (-webkit-min-device-pixel-ratio: 2), (min-resolution: 192dpi) {
    .complexica-pagesection a.complexica-pagesection-expander.complexica-pagesection-expander-collapsed {
        background-image: url("../images/expand-down-button@2x.png");
    }
}

.complexica-pagesection a.complexica-pagesection-expander.complexica-pagesection-expander-expanded {
    background-image: url("../images/expand-up-button.png");
}

@media (-webkit-min-device-pixel-ratio: 2), (min-resolution: 192dpi) {
    .complexica-pagesection a.complexica-pagesection-expander.complexica-pagesection-expander-expanded {
        background-image: url("../images/expand-up-button@2x.png");
    }
}