/**
 * pvt-gallery.css — Responsive gallery grid + Lightbox
 * PVT Image Pro v1.2.0 | Phase 3
 *
 * Layout: CSS Grid, mobile-first
 * Breakpoints: 768px, 1024px
 * Aspect ratio: padding-bottom % trick (không dùng CSS aspect-ratio)
 * Không dùng: aspect-ratio, color-mix(), :has(), dvh
 */

/* ── CSS Variables ────────────────────────────────────────────────────────── */
:root {
    --pvt-accent:    #C88830;       /* Amber — YogiBee brand */
    --pvt-thumb-bg:  #f5f2ee;       /* Cream placeholder */
    --pvt-gap:       8px;
    --pvt-radius:    4px;
    --pvt-lb-bg:     rgba(8, 8, 8, 0.96);
    --pvt-lb-text:   #ffffff;
    --pvt-lb-speed:  0.27s;
}

/* ═══════════════════════════════════════════════════════════════════════════
   GALLERY GRID
   ══════════════════════════════════════════════════════════════════════════ */

.pvt-gallery {
    display: grid;
    grid-template-columns: repeat(2, 1fr); /* Mobile: 2 cột */
    gap: var(--pvt-gap);
    margin: 1.5rem 0;
}

/* Tablet: 3 cột */
@media (min-width: 768px) {
    .pvt-gallery { grid-template-columns: repeat(3, 1fr); gap: 12px; }
}

/* Desktop: tuỳ theo columns attr */
@media (min-width: 1024px) {
    .pvt-gallery                { grid-template-columns: repeat(4, 1fr); gap: 16px; }
    .pvt-gallery.pvt-gallery--2col { grid-template-columns: repeat(2, 1fr); }
    .pvt-gallery.pvt-gallery--3col { grid-template-columns: repeat(3, 1fr); }
    .pvt-gallery.pvt-gallery--5col { grid-template-columns: repeat(5, 1fr); }
    .pvt-gallery.pvt-gallery--6col { grid-template-columns: repeat(6, 1fr); }
}

/* ── Gallery Item ─────────────────────────────────────────────────────────── */

.pvt-gallery__item {
    min-width: 0; /* Tránh overflow trong grid */
}

.pvt-gallery__link {
    display: block;
    text-decoration: none;
    color: inherit;
    overflow: hidden;
    border-radius: var(--pvt-radius);
}

/* ── Thumbnail container: padding-bottom % trick ─────────────────────────── */

.pvt-gallery__thumb {
    position: relative;
    width: 100%;
    overflow: hidden;
    background-color: var(--pvt-thumb-bg);
    border-radius: var(--pvt-radius);
    /* padding-bottom được set inline theo ratio attribute */
}

/* picture và img: absolute fill toàn bộ thumb container */
.pvt-gallery__picture {
    position: absolute;
    top: 0; left: 0;
    width: 100%; height: 100%;
    display: block;
}

.pvt-gallery__img {
    position: absolute;
    top: 0; left: 0;
    width: 100%; height: 100%;
    object-fit: cover;
    display: block;
    /* Transition cho pvt-lazy fade-in (tương tác với pvt-lazy.css) */
}

/* Hover: nhẹ nhàng, không distract */
.pvt-gallery__link:hover .pvt-gallery__img,
.pvt-gallery__link:focus .pvt-gallery__img {
    opacity: 0.88;
}

.pvt-gallery__link:focus {
    outline: 2px solid var(--pvt-accent);
    outline-offset: 2px;
}

/* ── Caption ─────────────────────────────────────────────────────────────── */

.pvt-gallery__cap {
    margin: 4px 0 0;
    font-size: 0.78rem;
    color: #666;
    text-align: center;
    line-height: 1.4;
}

/* ═══════════════════════════════════════════════════════════════════════════
   LIGHTBOX
   ══════════════════════════════════════════════════════════════════════════ */

.pvt-lb {
    position: fixed;
    top: 0; left: 0; right: 0; bottom: 0;
    z-index: 99999;
    display: flex;
    align-items: center;
    justify-content: center;
    opacity: 0;
    transition: opacity var(--pvt-lb-speed) ease;
}

/* JS đóng lightbox bằng thuộc tính [hidden], nhưng `display:flex` ở trên có
   độ ưu tiên cao hơn quy tắc mặc định [hidden]{display:none} của trình duyệt.
   Thiếu dòng này, lightbox tuy trong suốt (opacity:0) vẫn phủ kín màn hình ở
   z-index 99999 và nuốt toàn bộ click của trang. */
.pvt-lb[hidden] {
    display: none;
}

.pvt-lb--open {
    opacity: 1;
}

/* ── Overlay ──────────────────────────────────────────────────────────────── */

.pvt-lb__overlay {
    position: absolute;
    top: 0; left: 0; right: 0; bottom: 0;
    background: var(--pvt-lb-bg);
    cursor: pointer;
}

/* ── Wrapper (z-index cao hơn overlay) ───────────────────────────────────── */

.pvt-lb__wrap {
    position: relative;
    z-index: 1;
    display: flex;
    align-items: center;
    justify-content: center;
    width: 100%;
    height: 100%;
    padding: 48px 60px 64px; /* top: cho close btn; left/right: cho nav; bottom: footer */
    box-sizing: border-box;
}

@media (max-width: 767px) {
    .pvt-lb__wrap { padding: 56px 8px 80px; }
}

/* ── Close button ────────────────────────────────────────────────────────── */

.pvt-lb__close {
    position: absolute;
    top: 12px; right: 12px;
    width: 40px; height: 40px;
    display: flex; align-items: center; justify-content: center;
    background: rgba(255,255,255,0.1);
    border: 1px solid rgba(255,255,255,0.2);
    border-radius: 50%;
    color: var(--pvt-lb-text);
    cursor: pointer;
    transition: background 0.2s ease, color 0.2s ease;
    padding: 0;
}

.pvt-lb__close:hover,
.pvt-lb__close:focus {
    background: var(--pvt-accent);
    border-color: var(--pvt-accent);
    outline: none;
}

/* ── Nav buttons ─────────────────────────────────────────────────────────── */

.pvt-lb__nav {
    position: absolute;
    top: 50%;
    /* translateY không làm reflow — safe to use trong lightbox context */
    transform: translateY(-50%);
    width: 44px; height: 64px;
    display: flex; align-items: center; justify-content: center;
    background: rgba(255,255,255,0.08);
    border: 1px solid rgba(255,255,255,0.15);
    border-radius: var(--pvt-radius);
    color: var(--pvt-lb-text);
    cursor: pointer;
    transition: background 0.2s ease;
    padding: 0;
    z-index: 2;
}

.pvt-lb__prev { left: 10px; }
.pvt-lb__next { right: 10px; }

.pvt-lb__nav:hover,
.pvt-lb__nav:focus {
    background: var(--pvt-accent);
    border-color: var(--pvt-accent);
    outline: none;
}

@media (max-width: 767px) {
    .pvt-lb__nav  { width: 36px; height: 48px; }
    .pvt-lb__prev { left: 4px; }
    .pvt-lb__next { right: 4px; }
}

/* ── Content / Image ──────────────────────────────────────────────────────── */

.pvt-lb__content {
    display: flex;
    align-items: center;
    justify-content: center;
    max-width: 90vw;
    max-height: 85vh;
    overflow: hidden;
}

.pvt-lb__picture {
    display: flex;
    align-items: center;
    justify-content: center;
    max-width: 100%;
    max-height: 85vh;
}

.pvt-lb__img {
    display: block;
    max-width: 90vw;
    max-height: 85vh;
    width: auto;
    height: auto;
    object-fit: contain;
    border-radius: var(--pvt-radius);
    transition: opacity var(--pvt-lb-speed) ease;
}

/* Fade khi navigate */
.pvt-lb__img--fade {
    opacity: 0;
}

/* ── Footer: caption + counter ───────────────────────────────────────────── */

.pvt-lb__footer {
    position: absolute;
    bottom: 0; left: 0; right: 0;
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 10px 16px 12px;
    background: linear-gradient(to top, rgba(0,0,0,0.5), transparent);
}

.pvt-lb__cap {
    color: var(--pvt-lb-text);
    font-size: 0.85rem;
    line-height: 1.4;
    max-width: 70%;
    opacity: 0.9;
}

.pvt-lb__counter {
    color: rgba(255,255,255,0.65);
    font-size: 0.8rem;
    font-variant-numeric: tabular-nums;
    white-space: nowrap;
    margin-left: auto;
}