/* Zoom Scroll — frontend styles */

.zoom-scroll {
    --zs-bg:             transparent;
    --zs-text:           currentColor;
    --zs-accent:         #ffffff;
    --zs-radius:         16px;
    --zs-section-height: 250vh;
    --zs-start-scale:    0.5;
    --zs-end-scale:      1;
    --zs-scale:          var(--zs-start-scale);
    --zs-overlay:        0;
    /* Luft over billedet ved fuld zoom — så toppen ikke ryger bag
     * en fixed/sticky header. Interpoleres af JS fra 0 → --zs-full-offset. */
    --zs-full-offset:    130px;
    --zs-pad-top:        0px;

    position: relative;
    width: 100%;
    background: var(--zs-bg);
    color: var(--zs-text);
}

/* ===== Top-tekst: inde i scroll-area, scrolles ud naturligt ===== */

.zoom-scroll__top {
    position: relative;
    text-align: center;
    max-width: 820px;
    margin: 0 auto;
    padding: clamp(48px, 8vh, 96px) 24px clamp(20px, 3vh, 40px);
}

.zoom-scroll__heading {
    font-size: clamp(1.75rem, 4vw, 3rem);
    line-height: 1.1;
    letter-spacing: -0.015em;
    font-weight: 600;
    margin: 0 0 16px;
    color: inherit;
}

.zoom-scroll__desc {
    font-size: clamp(0.95rem, 1.2vw, 1.1rem);
    line-height: 1.6;
    margin: 0;
    opacity: 0.75;
    color: inherit;
}

/* ===== Scroll-area: height = zoom-distancen =====
 * VIGTIGT: ingen overflow her — sticky-barnet vil ikke virke
 * hvis forælderen har overflow:clip/hidden/scroll/auto. */

.zoom-scroll__scroll-area {
    position: relative;
    height: var(--zs-section-height);
}

/* ===== Sticky: låser sig i viewport mens scroll-area passerer =====
 * align-items:flex-start sætter billedet tæt på toppen af viewport.
 * --zs-pad-top interpoleres af JS: lille ved start (tæt på teksten),
 * vokser mod fuld zoom så billedets top ikke cuttes af nav-menuen. */

.zoom-scroll__sticky {
    position: sticky;
    top: 0;
    height: 100vh;
    width: 100%;
    display: flex;
    align-items: flex-start;
    justify-content: center;
    overflow: hidden;
    padding-top: var(--zs-pad-top, 0px);
    box-sizing: border-box;
}

/* ===== Stage: selve billedcontaineren der skaleres =====
 * Bredden er begrænset så start-scale giver et mindre billede.
 * end-scale får det til at fylde den naturlige bredde — IKKE viewport,
 * så border-radius forbliver synlig hele vejen igennem.
 * max-height sikrer at billede + --zs-pad-top altid passer i 100vh. */

.zoom-scroll__stage {
    position: relative;
    width: min(80vw, 1280px);
    aspect-ratio: 16 / 9;
    max-height: calc(100vh - var(--zs-full-offset) - 24px);
    border-radius: var(--zs-radius);
    overflow: hidden;
    transform: scale(var(--zs-scale));
    transform-origin: center top;
    will-change: transform;
    transition: transform 0.05s linear;
    background: #000;
}

/* ===== Billede-lag: crossfade ved tab-skift ===== */

.zoom-scroll__media-layer {
    position: absolute;
    inset: 0;
    opacity: 0;
    transition: opacity 0.5s ease;
}

.zoom-scroll__media-layer.is-active {
    opacity: 1;
}

.zoom-scroll__media-layer img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    display: block;
}

/* ===== Overlay: fader ind efter zoom ===== */

.zoom-scroll__overlay {
    position: absolute;
    inset: 0;
    display: flex;
    flex-direction: column;
    justify-content: flex-end;
    padding: clamp(20px, 4vw, 56px);
    background: linear-gradient(
        to bottom,
        transparent 0%,
        transparent 35%,
        rgba(0,0,0,0.55) 70%,
        rgba(0,0,0,0.80) 100%
    );
    color: var(--zs-accent);
    opacity: var(--zs-overlay);
    pointer-events: none;
    transition: opacity 0.15s linear;
}

.zoom-scroll.is-interactive .zoom-scroll__overlay {
    pointer-events: auto;
}

/* ===== Tabs ===== */

.zoom-scroll__tabs {
    display: flex;
    gap: clamp(14px, 2.5vw, 36px);
    flex-wrap: wrap;
    margin-bottom: clamp(12px, 2vw, 24px);
    border-bottom: 1px solid rgba(255,255,255,0.2);
    padding-bottom: 2px;
}

.zoom-scroll__tab {
    background: transparent;
    border: none;
    color: var(--zs-accent);
    font: inherit;
    font-size: clamp(0.85rem, 1.1vw, 1rem);
    font-weight: 500;
    padding: 8px 0;
    cursor: pointer;
    opacity: 0.6;
    position: relative;
    transition: opacity 0.2s;
    white-space: nowrap;
}

.zoom-scroll__tab:hover { opacity: 0.9; }
.zoom-scroll__tab:focus-visible { outline: 2px solid var(--zs-accent); outline-offset: 4px; }
.zoom-scroll__tab[aria-selected="true"] { opacity: 1; }

.zoom-scroll__tab::after {
    content: '';
    position: absolute;
    left: 0; right: 0; bottom: -1px;
    height: 2px;
    background: var(--zs-accent);
    transform: scaleX(0);
    transform-origin: left;
    transition: transform 0.3s ease;
}

.zoom-scroll__tab[aria-selected="true"]::after { transform: scaleX(1); }

/* ===== Panels ===== */

.zoom-scroll__panels { max-width: 600px; }

.zoom-scroll__panel {
    display: none;
    animation: zs-fade-in 0.3s ease forwards;
}

.zoom-scroll__panel.is-active { display: block; }

@keyframes zs-fade-in {
    from { opacity: 0; transform: translateY(6px); }
    to   { opacity: 1; transform: translateY(0); }
}

.zoom-scroll__panel-heading {
    font-size: clamp(1.3rem, 2.5vw, 2.1rem);
    font-weight: 600;
    line-height: 1.15;
    margin: 0 0 10px;
    color: var(--zs-accent);
    letter-spacing: -0.01em;
}

.zoom-scroll__panel-body {
    font-size: clamp(0.88rem, 1.05vw, 1rem);
    line-height: 1.6;
    margin: 0 0 18px;
    opacity: 0.9;
    color: var(--zs-accent);
}

.zoom-scroll__panel-cta {
    display: inline-block;
    background: var(--zs-accent);
    color: #111;
    padding: 11px 26px;
    border-radius: 999px;
    font-size: 0.88rem;
    font-weight: 500;
    text-decoration: none;
    transition: transform 0.2s, box-shadow 0.2s;
}

.zoom-scroll__panel-cta:hover {
    transform: translateY(-2px);
    box-shadow: 0 8px 20px -4px rgba(0,0,0,0.4);
}

/* ===== Reduced motion ===== */

@media (prefers-reduced-motion: reduce) {
    .zoom-scroll__stage {
        transform: scale(var(--zs-end-scale)) !important;
        transition: none;
    }
    .zoom-scroll__overlay {
        opacity: 1 !important;
        pointer-events: auto !important;
    }
    .zoom-scroll__scroll-area {
        height: auto !important;
        min-height: 100vh;
    }
    .zoom-scroll__panel {
        animation: none;
    }
}

/* ===== Mobil ===== */

@media (max-width: 992px) {
    .zoom-scroll__stage {
        aspect-ratio: 4 / 5;
    }
    .zoom-scroll__tabs {
        flex-wrap: nowrap;
        overflow-x: auto;
        -webkit-overflow-scrolling: touch;
        scroll-snap-type: x mandatory;
        gap: 20px;
        padding-bottom: 6px;
        padding-left: 18px;
        padding-right: 18px;
        margin-left: -18px;
        margin-right: -18px;
    }
    .zoom-scroll__tabs::-webkit-scrollbar { display: none; }
    .zoom-scroll__tab {
        flex: 0 0 auto;
        scroll-snap-align: start;
    }
    .zoom-scroll__overlay {
        padding: 20px 18px;
    }
}

@media (max-width: 600px) {
    .zoom-scroll__stage {
        aspect-ratio: 3 / 4;
    }
}