/* pat-gallery */

.pat-gallery img {
    cursor: pointer;
}

/* pat-toggle accordion */

/* Note:
 * - The animation is on max-height with keyframes because a transition of
 *   height with an unknown end value does not work. See:
 *   https://stackoverflow.com/a/8331169/1337474
 * - On closing there is an animation on padding with an step-end timing
 *   function to remove the padding at the END of the transition in order to
 *   fully close the accordion.
 * - We rotate the "▶" sign because the "▼" looks different and we can animate
 *   the rotation.
 */
@keyframes animate_close {
    from {
        max-height: 1000px;
    }
    to {
        max-height: 0;
    }
}
@keyframes animate_open {
    from {
        max-height: 0;
    }
    to {
        max-height: 1000px;
    }
}
.accordion-item .accordion-content {
    overflow: hidden;
    animation-duration: 0.5s;
}
.accordion-item.closed .accordion-content {
    max-height: 0;
    padding: 0;
    animation-name: animate_close;
    transition: padding 0.5s step-end;
}
.accordion-item:not(.closed) .accordion-content {
    animation-name: animate_open;
}
.accordion-item .card-header .pat-toggle:before {
    content: "▶";
    display: inline-block;
    transition: transform 0.3s;
}
.accordion-item:not(.closed) .card-header .pat-toggle:before {
    transform: rotate(90deg);
}

/* pat-collapsible */

.pat-collapsible {
    margin-bottom: 0.5em;
}

.pat-collapsible > *:first-child:before {
    content: "▼";
    width: 1.5em;
    display: inline-block;
}

.pat-collapsible.closed > *:first-child:before {
    content: "▶";
}

.pat-collapsible > .panel-content {
    padding-top: 1em;
    padding-bottom: 1em;
    width: 100% !important;
}

.pat-collapsible > *:first-child {
    font-family: "Source Sans Pro", sans-serif;
    margin: 0 0.5em 0 0;
    border: 1px solid rgba(0, 0, 0, 0.3);
    cursor: default;
    border-radius: 0.2em;
    background-image: -moz-linear-gradient(
        bottom,
        rgba(0, 0, 0, 0.2) 0%,
        rgba(255, 255, 255, 0.2) 100%
    );
    background-image: -webkit-linear-gradient(
        bottom,
        rgba(0, 0, 0, 0.2) 0%,
        rgba(255, 255, 255, 0.2) 100%
    );
    background-image: linear-gradient(
        bottom,
        rgba(0, 0, 0, 0.2) 0%,
        rgba(255, 255, 255, 0.2) 100%
    );
    text-decoration: none !important;
    line-height: 1.5;
    white-space: nowrap;
    background-color: transparent;
    display: inline-block;
    padding-top: 0;
    padding-left: 1em;
    padding-right: 1em;
    font-size: 0.98em;

    font-weight: normal;
    width: 100%;

    -moz-box-sizing: border-box;
    -webkit-box-sizing: border-box;
    box-sizing: border-box;
}