/* htm/navcards – Bilderblock als Navigation
   Farben, Höhe und Breite der zugeklappten Karten lassen sich über die
   Custom Properties am Wrapper anpassen (z. B. im Sitepackage überschreiben). */

.htm-navcards {
    --htm-nc-height: clamp(380px, 56vw, 580px);
    --htm-nc-collapsed: 7rem;          /* Breite einer zugeklappten Karte */
    --htm-nc-gap: 1.5rem;
    --htm-nc-radius: 1.5rem;
    --htm-nc-duration: 800ms;
    --htm-nc-ease: cubic-bezier(.4, 0, .2, 1);
    --htm-nc-text: #fff;
    --htm-nc-shade: #0b0f1a;           /* Farbe des Verlaufs über dem Foto */
    --htm-nc-button-bg: #fff;
    --htm-nc-button-fg: #0b0f1a;
    --htm-nc-focus: #4a90e2;
    --htm-nc-title-font: Georgia, "Times New Roman", serif;
}

.htm-navcards__heading {
    margin: 0 0 1.25rem;
}

.htm-navcards__track {
    display: flex;
    gap: var(--htm-nc-gap);
    height: var(--htm-nc-height);
}

.htm-navcards__card {
    position: relative;
    flex: 0 0 var(--htm-nc-collapsed);
    min-width: 0;
    overflow: hidden;
    border-radius: var(--htm-nc-radius);
    background: var(--htm-nc-shade);
    color: var(--htm-nc-text);
    transition: flex-grow var(--htm-nc-duration) var(--htm-nc-ease);
    will-change: flex-grow;
}

.htm-navcards__card.is-open {
    flex-grow: 1;
}

/* Hintergrundfoto */
.htm-navcards__bg {
    position: absolute;
    inset: 0;
    width: 100%;
    height: 100%;
    object-fit: cover;
    object-position: center;
    display: block;
}

/* Dunkler Verlauf, damit der Text lesbar bleibt */
.htm-navcards__shade {
    position: absolute;
    inset: 0;
    background:
        linear-gradient(90deg, color-mix(in srgb, var(--htm-nc-shade) 92%, transparent) 0%, color-mix(in srgb, var(--htm-nc-shade) 45%, transparent) 45%, color-mix(in srgb, var(--htm-nc-shade) 15%, transparent) 100%),
        linear-gradient(0deg, color-mix(in srgb, var(--htm-nc-shade) 85%, transparent) 0%, transparent 55%);
    opacity: 1;
    transition: opacity var(--htm-nc-duration) var(--htm-nc-ease);
}

.htm-navcards__card:not(.is-open) .htm-navcards__shade {
    background: color-mix(in srgb, var(--htm-nc-shade) 45%, transparent);
}

/* Klickfläche: deckt die zugeklappte Karte komplett ab */
.htm-navcards__toggle {
    position: absolute;
    inset: 0;
    z-index: 3;
    width: 100%;
    height: 100%;
    margin: 0;
    padding: 0;
    border: 0;
    background: transparent;
    cursor: pointer;
    border-radius: inherit;
}

.htm-navcards__toggle:focus-visible {
    outline: 3px solid var(--htm-nc-focus);
    outline-offset: -3px;
}

.htm-navcards__card.is-open .htm-navcards__toggle {
    /* Offene Karte: Button nur noch für Tastatur-Fokus da, Inhalt bleibt klickbar */
    pointer-events: none;
    inset: auto 0 auto auto;
    width: 1px;
    height: 1px;
    opacity: 0;
}

.htm-navcards__sr {
    position: absolute;
    width: 1px;
    height: 1px;
    overflow: hidden;
    clip: rect(0 0 0 0);
    white-space: nowrap;
}

/* Icon: zugeklappt mittig, aufgeklappt oben links */
.htm-navcards__icon {
    position: absolute;
    z-index: 2;
    display: grid;
    place-items: center;
    width: 3rem;
    height: 3rem;
    left: 50%;
    top: 50%;
    transform: translate(-50%, -50%);
    transition:
        left var(--htm-nc-duration) var(--htm-nc-ease),
        top var(--htm-nc-duration) var(--htm-nc-ease),
        transform var(--htm-nc-duration) var(--htm-nc-ease);
}

.htm-navcards__icon img {
    width: 3rem;
    height: 3rem;
    object-fit: contain;
    filter: brightness(0) invert(1);   /* Icon weiß einfärben */
}

.htm-navcards__card.is-open .htm-navcards__icon {
    left: 2.25rem;
    top: 2.25rem;
    transform: none;
}

/* Inhalt */
.htm-navcards__content {
    position: absolute;
    z-index: 2;
    inset: 0;
    display: flex;
    flex-direction: column;
    justify-content: space-between;
    padding: 6.25rem 2.25rem 2.25rem;
    width: min(100%, 44rem);
    opacity: 0;
    visibility: hidden;
    transform: translateY(0.5rem);
    transition:
        opacity calc(var(--htm-nc-duration) * .5) var(--htm-nc-ease),
        transform calc(var(--htm-nc-duration) * .5) var(--htm-nc-ease),
        visibility 0s linear calc(var(--htm-nc-duration) * .5);
}

.htm-navcards__card.is-open .htm-navcards__content {
    opacity: 1;
    visibility: visible;
    transform: none;
    transition-delay: calc(var(--htm-nc-duration) * .35), calc(var(--htm-nc-duration) * .35), 0s;
}

.htm-navcards__card:not(:has(.htm-navcards__icon)) .htm-navcards__content {
    padding-top: 2.25rem;
}

.htm-navcards__title {
    margin: 0;
    font-family: var(--htm-nc-title-font);
    font-weight: 500;
    font-size: clamp(1.6rem, 3.2vw, 2.6rem);
    line-height: 1.15;
    letter-spacing: -0.01em;
}

.htm-navcards__teaser {
    margin: 0.75rem 0 0;
    font-size: 1.05rem;
    opacity: .9;
}

.htm-navcards__text {
    margin-top: auto;
    padding-top: 1.5rem;
    font-size: 1rem;
    line-height: 1.5;
}

.htm-navcards__text > :first-child { margin-top: 0; }
.htm-navcards__text > :last-child  { margin-bottom: 0; }

.htm-navcards__button {
    align-self: flex-start;
    margin-top: 1.25rem;
    padding: 0.7rem 1.4rem;
    border-radius: 999px;
    background: var(--htm-nc-button-bg);
    color: var(--htm-nc-button-fg);
    font-weight: 600;
    text-decoration: none;
    transition: transform 200ms var(--htm-nc-ease), opacity 200ms;
}

.htm-navcards__button:hover,
.htm-navcards__button:focus-visible {
    transform: translateY(-2px);
    opacity: .92;
    outline-color: var(--htm-nc-focus);
}

/* Mobil: Karten untereinander, alle aufgeklappt */
@media (max-width: 767px) {
    .htm-navcards__track {
        flex-direction: column;
        height: auto;
    }

    .htm-navcards__card,
    .htm-navcards__card.is-open {
        flex: 0 0 auto;
        min-height: 26rem;
    }

    .htm-navcards__toggle { display: none; }

    .htm-navcards__card .htm-navcards__icon,
    .htm-navcards__card.is-open .htm-navcards__icon {
        left: 1.5rem;
        top: 1.5rem;
        transform: none;
    }

    .htm-navcards__content {
        position: relative;
        width: auto;
        padding: 6.5rem 1.5rem 1.5rem;
        opacity: 1;
        visibility: visible;
        transform: none;
        min-height: 26rem;
    }

    .htm-navcards__card:not(.is-open) .htm-navcards__shade {
        background: inherit;
    }

    .htm-navcards__shade {
        background:
            linear-gradient(0deg, color-mix(in srgb, var(--htm-nc-shade) 90%, transparent) 0%, color-mix(in srgb, var(--htm-nc-shade) 40%, transparent) 60%, color-mix(in srgb, var(--htm-nc-shade) 20%, transparent) 100%) !important;
    }
}

@media (prefers-reduced-motion: reduce) {
    .htm-navcards { --htm-nc-duration: 0ms; }
}