.k9er-qef {
    margin: 1.5rem 0;
}

.k9er-qef * {
    box-sizing: border-box;
}

.k9er-qef-filter {
    display: flex;
    flex-wrap: wrap;
    gap: .5rem;
    margin: 0 0 1rem;
}

.k9er-qef-filter-button {
    border: 1px solid var(--k9er-qef-border, #d1d5db);
    border-radius: 999px;
    background: #fff;
    color: var(--k9er-qef-question, #111827);
    cursor: pointer;
    font: inherit;
    line-height: 1.2;
    padding: .45rem .85rem;
}

.k9er-qef-filter-button:hover,
.k9er-qef-filter-button:focus,
.k9er-qef-filter-button.is-active {
    border-color: var(--k9er-qef-accent, #1e73be);
    color: var(--k9er-qef-accent, #1e73be);
    outline: none;
}

.k9er-qef-group {
    margin: 2rem 0;
}

.k9er-qef-group:first-child {
    margin-top: 0;
}

.k9er-qef-group-title {
    margin: 0 0 1rem;
}

.k9er-qef-index {
    border: 1px solid var(--k9er-qef-border, #d1d5db);
    border-radius: .5rem;
    margin: 0 0 1.25rem;
    padding: 1rem 1rem 1rem 2rem;
}

.k9er-qef-index a,
.k9er-qef-back-to-index a {
    color: var(--k9er-qef-accent, #1e73be);
}

.k9er-qef-items {
    display: grid;
    gap: .875rem;
}

.k9er-qef-item {
    border: 1px solid var(--k9er-qef-border, #d1d5db);
    border-radius: .5rem;
    overflow: hidden;
    background: #fff;
}

.k9er-qef-item[hidden] {
    display: none !important;
}

.k9er-qef-question {
    color: var(--k9er-qef-question, #111827);
    font-weight: 700;
    line-height: 1.35;
    margin: 0;
    padding: 1rem;
}

h3.k9er-qef-question {
    border-bottom: 1px solid var(--k9er-qef-border, #d1d5db);
}

.k9er-qef-details > summary.k9er-qef-question {
    cursor: pointer;
    list-style: none;
    position: relative;
    padding-right: 2.75rem;
}

.k9er-qef-details > summary.k9er-qef-question::-webkit-details-marker {
    display: none;
}

.k9er-qef-details > summary.k9er-qef-question::after {
    border-right: 2px solid currentColor;
    border-bottom: 2px solid currentColor;
    content: "";
    height: .55rem;
    position: absolute;
    right: 1rem;
    top: 50%;
    transform: translateY(-65%) rotate(45deg);
    transition: transform .18s ease;
    width: .55rem;
}

.k9er-qef-details[open] > summary.k9er-qef-question::after {
    transform: translateY(-35%) rotate(225deg);
}

.k9er-qef-answer {
    color: var(--k9er-qef-answer, #374151);
    padding: 1rem;
}

.k9er-qef-details .k9er-qef-answer {
    border-top: 1px solid var(--k9er-qef-border, #d1d5db);
}

.k9er-qef-answer > :first-child {
    margin-top: 0;
}

.k9er-qef-answer > :last-child {
    margin-bottom: 0;
}

.k9er-qef-gallery {
    display: grid;
    gap: .75rem;
    grid-template-columns: repeat(auto-fit, minmax(140px, 1fr));
    margin-top: 1rem;
}

.k9er-qef-gallery-figure {
    margin: 0;
}

.k9er-qef-gallery-image {
    border-radius: .375rem;
    display: block;
    height: auto;
    max-width: 100%;
}

.k9er-qef-back-to-index {
    font-size: .925em;
    margin: 1rem 0 0;
}

.k9er-qef-empty {
    border: 1px solid var(--k9er-qef-border, #d1d5db);
    border-radius: .5rem;
    padding: 1rem;
}