/* ============================================================
   GALLERY PAGE — gallery.css
   ============================================================ */

/* ============================================================
   STEP 1 — SECTION SPACING
   ============================================================ */
.gallery-section {
    padding: var(--space-xl) 0 var(--space-2xl);
}

/* ============================================================
   STEP 2 — FILTER PILLS
   ============================================================ */
.filter-pills-sentinel {
    height: 1px;
}
.filter-pills {
    position: sticky;
    top: calc(var(--nav-height-desktop) + var(--space-sm));
    z-index: 50;
    display: flex;
    flex-wrap: wrap;
    gap: var(--space-xs);
    padding: var(--space-sm) var(--space-md);
    margin-bottom: var(--space-lg);
    border-radius: var(--radius-lg);
    background-color: rgba(247, 247, 247, 0.7);
    border: 1px solid rgba(57, 62, 70, 0.08);
    transition: box-shadow var(--duration-normal) var(--ease-standard),
                background-color var(--duration-normal) var(--ease-standard);
}
.filter-pills.is-stuck {
    background-color: rgba(247, 247, 247, 0.9);
    backdrop-filter: blur(10px);
    -webkit-backdrop-filter: blur(10px);
    box-shadow: 0 6px 20px rgba(29, 43, 54, 0.1);
}
.filter-pill {
    font-family: var(--font-body);
    font-size: 14px;
    font-weight: 500;
    color: var(--color-primary-dark);
    background-color: transparent;
    border: 1px solid rgba(57, 62, 70, 0.25);
    border-radius: var(--radius-sm);
    padding: 8px 18px;
    cursor: pointer;
    transition: background-color var(--duration-fast) var(--ease-standard),
                color var(--duration-fast) var(--ease-standard),
                border-color var(--duration-fast) var(--ease-standard);
}
.filter-pill:hover {
    border-color: var(--color-secondary-slate);
    color: var(--color-secondary-slate);
}
.filter-pill.is-active {
    background-color: var(--color-primary-dark);
    border-color: var(--color-primary-dark);
    color: var(--color-offwhite);
}

/* ============================================================
   STEP 3 — MASONRY GRID (CSS COLUMNS TECHNIQUE)
   ============================================================ */
.masonry-grid {
    column-count: 4;
    column-gap: var(--space-md);
}
.masonry-tile {
    break-inside: avoid;
    margin-bottom: var(--space-md);
    border-radius: var(--radius-md);
    overflow: hidden;
    cursor: pointer;
    position: relative;
    background-color: rgba(57, 62, 70, 0.06);
    transition: box-shadow var(--duration-normal) var(--ease-standard),
                transform var(--duration-normal) var(--ease-standard);
}
.masonry-tile:hover {
    box-shadow: var(--shadow-card-hover);
    transform: translateY(-2px);
}
.masonry-tile img {
    width: 100%;
    height: auto;
    display: block;
    transition: transform var(--duration-slow) var(--ease-standard);
}
.masonry-tile:hover img {
    transform: scale(1.03);
}
/* Hidden tiles (filtered out) are removed from layout entirely */
.masonry-tile.is-hidden {
    display: none;
}
/* Category label overlay, appears on hover */
.masonry-tile__label {
    position: absolute;
    bottom: 0;
    left: 0;
    right: 0;
    padding: var(--space-sm) var(--space-md);
    background: linear-gradient(to top, rgba(29, 43, 54, 0.75), transparent);
    color: var(--color-offwhite);
    font-family: var(--font-body);
    font-size: 12px;
    font-weight: 600;
    letter-spacing: 0.3px;
    opacity: 0;
    transition: opacity var(--duration-normal) var(--ease-standard);
}
.masonry-tile:hover .masonry-tile__label {
    opacity: 1;
}

/* ============================================================
   STEP 4 — LIGHTBOX (iOS Liquid Glass Overlay)
   ============================================================ */
.lightbox {
    position: fixed;
    inset: 0;
    z-index: 2000;
    background-color: rgba(29, 43, 54, 0.68);
    backdrop-filter: blur(24px) saturate(180%);
    -webkit-backdrop-filter: blur(24px) saturate(180%);
    display: none;
    align-items: center;
    justify-content: center;
    opacity: 0;
    transition: opacity var(--duration-normal) var(--ease-standard);
}
.lightbox.is-open {
    display: flex;
    opacity: 1;
}
.lightbox__content {
    max-width: 90vw;
    max-height: 90vh;
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: var(--space-md);
}
.lightbox__image {
    max-width: 90vw;
    max-height: 80vh;
    width: auto;
    height: auto;
    object-fit: contain;
    border-radius: var(--radius-md);
    box-shadow: 0 16px 40px rgba(0, 0, 0, 0.35), 0 0 0 1px rgba(255, 255, 255, 0.12);
}
.lightbox__caption {
    font-family: var(--font-body);
    font-size: 14px;
    font-weight: 500;
    color: var(--color-offwhite);
    text-align: center;
    background: rgba(247, 247, 247, 0.12);
    border: 1px solid rgba(255, 255, 255, 0.18);
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
    padding: 8px 20px;
    border-radius: var(--radius-sm);
    box-shadow: 0 4px 16px rgba(0, 0, 0, 0.2);
}
.lightbox__close {
    position: absolute;
    top: var(--space-lg);
    right: var(--space-lg);
    color: var(--color-offwhite);
    background: rgba(247, 247, 247, 0.12);
    border: 1px solid rgba(255, 255, 255, 0.2);
    border-radius: 50%;
    width: 44px;
    height: 44px;
    display: flex;
    align-items: center;
    justify-content: center;
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
    cursor: pointer;
    padding: var(--space-xs);
    transition: background-color var(--duration-fast) var(--ease-standard),
                transform var(--duration-fast) var(--ease-standard);
}
.lightbox__close:hover {
    background: rgba(247, 247, 247, 0.25);
    transform: scale(1.05);
}
.lightbox__nav {
    position: absolute;
    top: 50%;
    transform: translateY(-50%);
    color: var(--color-offwhite);
    background: rgba(247, 247, 247, 0.12);
    border: 1px solid rgba(255, 255, 255, 0.2);
    border-radius: 50%;
    width: 48px;
    height: 48px;
    display: flex;
    align-items: center;
    justify-content: center;
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
    cursor: pointer;
    transition: background-color var(--duration-fast) var(--ease-standard),
                transform var(--duration-fast) var(--ease-standard);
}
.lightbox__nav:hover {
    background: rgba(247, 247, 247, 0.25);
    transform: translateY(-50%) scale(1.05);
}
.lightbox__nav--prev { left: var(--space-lg); }
.lightbox__nav--next { right: var(--space-lg); }

/* ============================================================
   STEP 5 — TABLET RESPONSIVE (768px–1023px)
   ============================================================ */
@media (min-width: 768px) and (max-width: 1023px) {
    .masonry-grid { column-count: 3; }
    .filter-pills { top: calc(var(--nav-height-desktop) + var(--space-xs)); }
}

/* ============================================================
   STEP 6 — MOBILE RESPONSIVE (below 768px)
   ============================================================ */
@media (max-width: 767px) {
    .intro-banner--compact { min-height: 28vh; }
    .masonry-grid { column-count: 2; column-gap: var(--space-sm); }
    .masonry-tile { margin-bottom: var(--space-sm); }
    .filter-pills {
        top: calc(var(--nav-height-mobile) + var(--space-xs));
        flex-wrap: nowrap;
        overflow-x: auto;
        scrollbar-width: none;
        padding-bottom: var(--space-md);
    }
    .filter-pills::-webkit-scrollbar { display: none; }
    .filter-pill { flex-shrink: 0; font-size: 13px; padding: 7px 14px; }

    .lightbox__nav { width: 40px; height: 40px; }
    .lightbox__nav--prev { left: var(--space-sm); }
    .lightbox__nav--next { right: var(--space-sm); }
    .lightbox__close { top: var(--space-md); right: var(--space-md); }
}