.materials {
    --materials-border: var(--color-border, #d9d9d9);
    --materials-surface: var(--color-surface, #f3f3f3);
    --materials-background: var(--color-background, #fff);
    --materials-text: var(--color-text, #222);
    --materials-accent: var(--color-primary, #333);
    --materials-accent-light: var(--color-primary-light, #eee);
    --materials-radius: 0.5rem;

    margin-top: 1.5rem;
    color: var(--materials-text);
}

.materials__intro {
    margin-bottom: 1.5rem;
}

/* basepackage limits p/ul/ol to a reading width (--max-width-paragraph) */
.materials p,
.materials ul {
    max-width: none;
}

.materials__sr-only {
    position: absolute;
    width: 1px;
    height: 1px;
    padding: 0;
    margin: -1px;
    overflow: hidden;
    clip: rect(0, 0, 0, 0);
    white-space: nowrap;
    border: 0;
}

/* Filterleiste */

.materials__filter {
    display: flex;
    flex-wrap: wrap;
    align-items: center;
    gap: 0.5rem 0.75rem;
    margin-bottom: 1rem;
}

.materials__filter[hidden] {
    display: none;
}

.materials__dropdown {
    position: relative;
}

.materials__dropdown-button,
.materials__reset {
    display: inline-flex;
    align-items: center;
    gap: 0.35rem;
    padding: 0.5rem 0.9rem;
    border: 1px solid var(--materials-border);
    border-radius: var(--materials-radius);
    background: var(--materials-background);
    color: inherit;
    font: inherit;
    cursor: pointer;
}

.materials__dropdown-button::after {
    content: "";
    width: 0.45em;
    height: 0.45em;
    margin-left: 0.2rem;
    border-right: 2px solid currentColor;
    border-bottom: 2px solid currentColor;
    transform: translateY(-25%) rotate(45deg);
    transition: transform 0.15s;
}

.materials__dropdown-button[aria-expanded="true"]::after {
    transform: translateY(25%) rotate(-135deg);
}

.materials__dropdown.is-active .materials__dropdown-button {
    border-color: var(--materials-accent);
    background: var(--materials-accent-light);
}

.materials__reset {
    border-color: transparent;
    background: none;
    text-decoration: underline;
}

.materials__dropdown-panel {
    position: absolute;
    z-index: 20;
    top: calc(100% + 0.25rem);
    left: 0;
    width: max-content;
    min-width: 14rem;
    max-width: min(22rem, calc(100vw - 2rem));
    max-height: 60vh;
    overflow-y: auto;
    margin: 0;
    padding: 0.5rem;
    border: 1px solid var(--materials-border);
    border-radius: var(--materials-radius);
    background: var(--materials-background);
    box-shadow: 0 0.5rem 1.5rem rgb(0 0 0 / 0.12);
}

.materials__dropdown-panel[hidden] {
    display: none;
}

@media (max-width: 40rem) {
    .materials__filter {
        position: relative;
    }

    .materials__dropdown {
        position: static;
    }

    .materials__dropdown-panel {
        right: 0;
        width: auto;
        max-width: none;
    }
}

.materials__option,
.materials__toggle {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    cursor: pointer;
}

.materials__option {
    padding: 0.35rem 0.5rem;
    border-radius: calc(var(--materials-radius) / 2);
}

.materials__option:hover {
    background: var(--materials-surface);
}

.materials__option input,
.materials__toggle input {
    width: 1.1rem;
    height: 1.1rem;
    margin: 0;
    accent-color: var(--materials-accent);
}

.materials__dropdown-button:focus-visible,
.materials__reset:focus-visible,
.materials__option input:focus-visible,
.materials__toggle input:focus-visible,
.materials__link:focus-visible {
    outline: 2px solid var(--materials-accent);
    outline-offset: 2px;
}

.materials__result {
    margin: 0 0 1rem;
    font-size: 0.9rem;
}

/* Kacheln */

.materials__grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(min(100%, 16rem), 1fr));
    gap: 1.25rem;
    margin: 0;
    padding: 0;
    list-style: none;
}

.materials__card {
    position: relative;
    display: flex;
    flex-direction: column;
    overflow: hidden;
    border: 1px solid var(--materials-border);
    border-radius: var(--materials-radius);
    background: var(--materials-background);
    transition: box-shadow 0.15s, transform 0.15s;
}

.materials__card[hidden] {
    display: none;
}

.materials__card:hover,
.materials__card:focus-within {
    box-shadow: 0 0.5rem 1.5rem rgb(0 0 0 / 0.12);
    transform: translateY(-2px);
}

.materials__thumb {
    position: relative;
    display: grid;
    place-items: center;
    aspect-ratio: 3 / 2;
    background: var(--materials-surface);
}

.materials__thumb::before {
    content: attr(data-type-label);
    font-size: 1.25rem;
    font-weight: 600;
    letter-spacing: 0.05em;
    opacity: 0.45;
}

.materials__thumb img {
    position: absolute;
    inset: 0;
    width: 100%;
    height: 100%;
    object-fit: cover;
    background: #fff;
}

.materials__body {
    display: flex;
    flex-direction: column;
    gap: 0.4rem;
    padding: 0.9rem 1rem 1rem;
}

.materials__meta {
    margin: 0;
    font-size: 0.8rem;
    text-transform: uppercase;
    letter-spacing: 0.04em;
    opacity: 0.75;
}

.materials__title {
    margin: 0;
    font-size: 1.05rem;
    line-height: 1.3;
    overflow-wrap: anywhere;
}

.materials__link {
    color: inherit;
    text-decoration: none;
}

.materials__link::after {
    content: "";
    position: absolute;
    inset: 0;
}

.materials__card:hover .materials__link {
    text-decoration: underline;
}

.materials__description {
    display: -webkit-box;
    -webkit-box-orient: vertical;
    -webkit-line-clamp: 3;
    overflow: hidden;
    margin: 0;
    font-size: 0.9rem;
}

.materials__tags {
    display: flex;
    flex-wrap: wrap;
    gap: 0.25rem;
    margin: 0.25rem 0 0;
    padding: 0;
    list-style: none;
    font-size: 0.7rem;
    line-height: 1.2;
}

.materials__tags li {
    margin: 0;
    font-size: 0.7rem;
    line-height: 1.2;
    padding: 0.15rem 0.4rem;
    border-radius: 999px;
    background: var(--materials-surface);
}

.materials__empty {
    padding: 1.5rem;
    border: 1px dashed var(--materials-border);
    border-radius: var(--materials-radius);
    text-align: center;
}

.materials__empty[hidden] {
    display: none;
}

@media (prefers-reduced-motion: reduce) {
    .materials__card,
    .materials__dropdown-button::after {
        transition: none;
    }

    .materials__card:hover,
    .materials__card:focus-within {
        transform: none;
    }
}