/* =============================================================
   Gallery Slider v3 — Inline Slider + Lightbox
   TYPO3 Fluid Partial, kein externes Framework
   Fix: g-lb-header als eigener Stacking-Layer über g-lb-stage
============================================================= */

/* ── Tokens ──────────────────────────────────────────────────── */
:root {
    --g-radius:        0.75rem;
    --g-radius-sm:     0.375rem;
    --g-nav-size:      44px;
    --g-transition:    320ms cubic-bezier(0.16, 1, 0.3, 1);
    --g-overlay-bg:    oklch(0.08 0.01 80 / 0.94);
    --g-btn-bg:        oklch(1 0 0 / 0.4);
    --g-btn-bg-dark:   oklch(0.15 0.01 80 / 0.75);
    --g-btn-hover:     rgba(238,0,0,1);
    --g-btn-hover-dark:oklch(0.08 0.01 80 / 0.88);
    --g-btn-hover-color:#fff;
    --g-btn-shadow:    0 2px 8px oklch(0.2 0.01 80 / 0.18);
    --g-accent:        #01696f;
    --g-accent-light:  #4f98a3;
    --g-surface:       #f9f8f5;
    --g-border:        oklch(0.7 0.005 80 / 0.2);
    --g-text:          #28251d;
    --g-text-muted:    #7a7974;
    --g-badge-bg:      oklch(0.15 0.01 80 / 0.82);
    --g-tab-active-bg: #fff;
}

/* ── Wrapper ─────────────────────────────────────────────────── */
.gallery-wrapper {
    position: relative;
    background: var(--g-surface);
    border-radius: var(--g-radius);
    overflow: hidden;
    box-shadow:
            0 1px 3px oklch(0.2 0.01 80 / 0.07),
            0 6px 24px oklch(0.2 0.01 80 / 0.07);
}

/* ── Tab Navigation ──────────────────────────────────────────── */
.g-tabs {
    display: flex;
    justify-content: center;
    gap: 0;
    padding: 0.875rem 1rem 0;
    background: var(--g-surface);
}

.g-tab {
    padding: 0.45rem 1.1rem;
    font-size: 0.875rem;
    font-weight: 500;
    color: var(--g-text-muted);
    background: transparent;
    border: 1px solid var(--g-border);
    cursor: pointer;
    transition: background var(--g-transition), color var(--g-transition);
    white-space: nowrap;
    line-height: 1.4;
}

.g-tab:first-child { border-radius: var(--g-radius-sm) 0 0 var(--g-radius-sm); }
.g-tab:last-child  { border-radius: 0 var(--g-radius-sm) var(--g-radius-sm) 0; }
.g-tab + .g-tab    { border-left: none; }

.g-tab.is-active {
    background: var(--g-tab-active-bg);
    color: var(--g-text);
    font-weight: 600;
    border-color: var(--g-border);
    box-shadow: inset 0 -2px 0 var(--g-accent);
}

.g-tab:hover:not(.is-active) {
    background: oklch(0.93 0.002 80);
    color: var(--g-text);
}

.g-tab:focus-visible {
    outline: 2px solid var(--g-accent);
    outline-offset: 2px;
    z-index: 1;
}

/* ── Inline Stage ────────────────────────────────────────────── */
.g-stage {
    position: relative;
    width: 100%;
    aspect-ratio: auto;
    background: #1a1a1a;
    overflow: hidden;
    cursor: zoom-in;
}

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

.g-stage-img {
    width: 100%;
    height: 100%;
    object-fit: contain;
    display: block;
    opacity: 0;
    transform: scale(1.015);
    transition: opacity var(--g-transition), transform var(--g-transition);
    user-select: none;
    -webkit-user-drag: none;
}

.g-stage-img.is-visible {
    opacity: 1;
    transform: scale(1);
}

.g-fullscreen-hint {
    position: absolute;
    bottom: 0.6rem;
    right: 0.6rem;
    background: var(--g-badge-bg);
    color: #fff;
    font-size: 0.7rem;
    font-weight: 500;
    padding: 4px 8px;
    border-radius: var(--g-radius-sm);
    display: flex;
    align-items: center;
    gap: 5px;
    pointer-events: none;
    backdrop-filter: blur(4px);
    letter-spacing: 0.02em;
    z-index: 100;
}

/* ── Inline Stage Caption ────────────────────────────────────── */
.g-stage-caption {
    position: absolute;
    bottom: 0;
    left: 0;
    right: 0;
    background-color: rgba(0, 0, 0, 0.5);
    color: #fff;
    font-size: 0.90rem;
    font-weight: 500;
    padding: 0.7rem;
    text-align: center;
    pointer-events: none;
    backdrop-filter: blur(0px);
    letter-spacing: 0.01em;
    line-height: 1.4;
}

.g-stage-caption:empty { display: none; }

.g-stage-counter {
    position: absolute;
    top: 0.6rem;
    left: 50%;
    transform: translateX(-50%);
    background: var(--g-badge-bg);
    color: #fff;
    font-size: 0.72rem;
    font-variant-numeric: tabular-nums;
    padding: 3px 10px;
    border-radius: var(--g-radius-sm);
    pointer-events: none;
    backdrop-filter: blur(4px);
}

/* ── Inline Nav Buttons ──────────────────────────────────────── */
.g-stage-btn {
    position: absolute;
    top: 50%;
    transform: translateY(-50%);
    width: var(--g-nav-size);
    height: var(--g-nav-size);
    border-radius: 10px;
    background: var(--g-btn-bg);
    color: var(--g-text);
    border: 1px solid var(--g-border);
    box-shadow: var(--g-btn-shadow);
    display: flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    transition: background var(--g-transition), transform var(--g-transition), box-shadow var(--g-transition);
    z-index: 5;
}

.g-stage-btn:hover        { background: var(--g-btn-hover); box-shadow: 0 4px 16px oklch(0.2 0.01 80 / 0.22); color: var(--g-btn-hover-color); }
.g-stage-btn:active       { transform: translateY(-50%) scale(0.92); }
.g-stage-btn:focus-visible { outline: 2px solid var(--g-accent); outline-offset: 2px; }
.g-stage-btn-prev { left: 0.75rem; }
.g-stage-btn-next { right: 0.75rem; }

/* ── Thumbnail Strip ─────────────────────────────────────────── */
.g-thumbstrip {
    display: flex;
    gap: 4px;
    padding: 0.5rem 0.75rem 0.75rem;
    overflow-x: auto;
    scrollbar-width: thin;
    scrollbar-color: oklch(0.7 0.005 80 / 0.4) transparent;
    scroll-behavior: smooth;
    background: var(--g-surface);
}

.g-thumbstrip::-webkit-scrollbar       { height: 4px; }
.g-thumbstrip::-webkit-scrollbar-thumb { background: oklch(0.7 0.005 80 / 0.4); border-radius: 2px; }

.g-thumb {
    flex: 0 0 auto;
    width: 64px;
    height: 46px;
    border-radius: 4px;
    overflow: hidden;
    cursor: pointer;
    border: 2px solid transparent;
    transition: border-color var(--g-transition), opacity var(--g-transition);
    opacity: 0.55;
    background: oklch(0.88 0.003 80);
}

.g-thumb img          { width: 100%; height: 100%; object-fit: cover; display: block; pointer-events: none; }
.g-thumb.is-active    { border-color: var(--g-accent); opacity: 1; }
.g-thumb:hover:not(.is-active) { border-color: var(--g-accent-light); opacity: 0.9;  }
.g-thumb:focus-visible { outline: 2px solid var(--g-accent); outline-offset: 2px; }

/* ══════════════════════════════════════════════════════════════
   LIGHTBOX
   Struktur:
     .g-lightbox              (position: fixed, flex-column)
       .g-lb-header           (eigener Layer, z-index: 20 — IMMER oben)
         .g-lb-counter
         .g-lb-close
       .g-lb-stage            (flex: 1, z-index: 10)
         .g-lb-btn-prev
         .g-lb-img-wrap
           .g-lb-img
           .g-lb-caption
         .g-lb-btn-next
       .g-lb-filmstrip        (z-index: 10)
══════════════════════════════════════════════════════════════ */

.g-lightbox {
    position: fixed;
    inset: 0;
    z-index: 9999;
    background: var(--g-overlay-bg);
    display: flex;
    flex-direction: column;
    align-items: stretch;
    opacity: 0;
    pointer-events: none;
    transition: opacity var(--g-transition);
    backdrop-filter: blur(10px);
    -webkit-backdrop-filter: blur(10px);
}

.g-lightbox.is-open {
    opacity: 1;
    pointer-events: all;
}

/* ── Lightbox Header (Close + Counter) ───────────────────────── */
.g-lb-header {
    position: relative;         /* eigener Stacking-Context */
    z-index: 20;                /* immer über .g-lb-stage */
    flex: 0 0 auto;
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 0.75rem 1rem;
    pointer-events: none;       /* Header-Fläche nicht klickbar */
}

.g-lb-counter {
    background: var(--g-badge-bg);
    color: #fff;
    font-size: 0.78rem;
    font-variant-numeric: tabular-nums;
    padding: 4px 12px;
    border-radius: var(--g-radius-sm);
    backdrop-filter: blur(4px);
    pointer-events: none;
    user-select: none;
}

.g-lb-close {
    pointer-events: all;        /* nur der Button ist klickbar */
    width: var(--g-nav-size);
    height: var(--g-nav-size);
    border-radius: 50%;
    background: var(--g-btn-bg-dark);
    color: #fff;
    border: 1px solid oklch(1 0 0 / 0.2);
    display: flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    transition: background var(--g-transition), transform var(--g-transition);
    backdrop-filter: blur(4px);
}

.g-lb-close:hover       { background: var(--g-btn-hover-dark); transform: scale(1.08); }
.g-lb-close:active      { transform: scale(0.94); }
.g-lb-close:focus-visible { outline: 2px solid var(--g-accent-light, #4f98a3); outline-offset: 3px; }

/* ── Lightbox Stage ──────────────────────────────────────────── */
.g-lb-stage {
    position: relative;
    flex: 1 1 auto;
    z-index: 10;
    display: flex;
    align-items: center;
    justify-content: center;
    overflow: hidden;
    /* Padding seitlich = Platz für Prev/Next-Buttons */
    padding: 0 3.5rem;
    min-height: 0;              /* wichtig: flex-child darf schrumpfen */
}

/* ── Lightbox Prev / Next ────────────────────────────────────── */
.g-lb-btn {
    position: absolute;
    top: 50%;
    transform: translateY(-50%);
    width: var(--g-nav-size);
    height: var(--g-nav-size);
    border-radius: 50%;
    background: var(--g-btn-bg-dark);
    color: #fff;
    border: 1px solid oklch(1 0 0 / 0.2);
    display: flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    transition: background var(--g-transition), transform var(--g-transition);
    z-index: 5;
    backdrop-filter: blur(4px);
    flex-shrink: 0;
}

.g-lb-btn:hover       { background: var(--g-btn-hover-dark); }
.g-lb-btn:active      { transform: translateY(-50%) scale(0.92); }
.g-lb-btn:focus-visible { outline: 2px solid var(--g-accent-light, #4f98a3); outline-offset: 3px; }

.g-lb-btn-prev { left: 0.75rem; }
.g-lb-btn-next { right: 0.75rem; }

/* ── Lightbox Bild + Caption ─────────────────────────────────── */
.g-lb-img-wrap {
    position: relative;
    display: flex;
    align-items: center;
    justify-content: center;
    width: 100%;
    height: 100%;
}

.g-lb-img {
    max-width: 100%;
    max-height: 100%;
    object-fit: contain;
    border-radius: var(--g-radius);
    opacity: 0;
    transform: scale(0.97);
    transition: opacity var(--g-transition), transform var(--g-transition);
    user-select: none;
    -webkit-user-drag: none;
    display: block;
}

.g-lb-img.is-visible {
    opacity: 1;
    transform: scale(1);
}

.g-lb-caption {
    position: absolute;
    bottom: 0.6rem;
    left: 50%;
    transform: translateX(-50%);
    background: var(--g-badge-bg);
    color: #fff;
    font-size: 0.8rem;
    padding: 4px 14px;
    border-radius: var(--g-radius-sm);
    white-space: nowrap;
    max-width: 80%;
    overflow: hidden;
    text-overflow: ellipsis;
    pointer-events: none;
    backdrop-filter: blur(4px);
}

.g-lb-caption:empty { display: none; }

/* ── Lightbox Filmstrip ──────────────────────────────────────── */
.g-lb-filmstrip {
    flex: 0 0 auto;
    z-index: 10;
    width: 100%;
    padding: 0.5rem 0.75rem 0.75rem;
    display: flex;
    gap: 5px;
    justify-content: center;
    overflow-x: auto;
    scrollbar-width: thin;
    scrollbar-color: oklch(1 0 0 / 0.3) transparent;
    scroll-behavior: smooth;
}

.g-lb-filmstrip::-webkit-scrollbar       { height: 4px; }
.g-lb-filmstrip::-webkit-scrollbar-thumb { background: oklch(1 0 0 / 0.3); border-radius: 2px; }

.g-lb-film-item {
    flex: 0 0 auto;
    width: 56px;
    height: 40px;
    border-radius: 4px;
    overflow: hidden;
    cursor: pointer;
    border: 2px solid transparent;
    transition: border-color var(--g-transition), opacity var(--g-transition);
    opacity: 0.45;
    background: oklch(0.3 0.005 80);
}

.g-lb-film-item img     { width: 100%; height: 100%; object-fit: cover; display: block; pointer-events: none; }
.g-lb-film-item.is-active { border-color: var(--g-accent-light, #4f98a3); opacity: 1; }
.g-lb-film-item:hover:not(.is-active) { opacity: 0.7; }
.g-lb-film-item:focus-visible { outline: 2px solid var(--g-accent-light, #4f98a3); outline-offset: 2px; }

/* ── Drag-Cursor ─────────────────────────────────────────────── */
.g-lb-stage.is-dragging,
.g-stage.is-dragging { cursor: grabbing; }

.g-lb-stage.is-dragging .g-lb-img,
.g-stage.is-dragging .g-stage-img { transition: none; }

/* ── Responsive ──────────────────────────────────────────────── */
@media (max-width: 600px) {
    .g-lb-stage        { padding: 0 2.75rem; }
    .g-lb-btn-prev     { left: 0.4rem; }
    .g-lb-btn-next     { right: 0.4rem; }
    .g-lb-film-item    { width: 44px; height: 32px; }
    .g-thumb           { width: 52px; height: 38px; }
    .g-tab             { font-size: 0.78rem; padding: 0.4rem 0.75rem; }
    .g-lb-header       { padding: 0.5rem 0.75rem; }
}

/* ── Reduced Motion ──────────────────────────────────────────── */
@media (prefers-reduced-motion: reduce) {
    .g-lightbox, .g-lb-img, .g-stage-img,
    .g-lb-btn, .g-stage-btn, .g-lb-film-item, .g-thumb,
    .g-lb-close {
        transition: none !important;
    }
}