/* ==========================================================================
   COLLECTION VIEWER — UNIFORM GRID OF ALL WORKS
   ========================================================================== */

html.collection-viewer-open,
body.collection-viewer-open {
    overflow: hidden;
    height: 100%;
}

.collection-viewer {
    position: fixed;
    inset: 0;
    z-index: 9998;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: clamp(0.75rem, 3vw, 1.5rem);
    overflow: hidden;
    overscroll-behavior: none;
    opacity: 0;
    visibility: hidden;
    transition: opacity 0.5s var(--ease-cinematic), visibility 0.5s var(--ease-cinematic);
}

.collection-viewer.is-open {
    opacity: 1;
    visibility: visible;
}

.collection-viewer[hidden] {
    display: none;
}

.collection-viewer__backdrop {
    position: fixed;
    inset: 0;
    background: rgba(45, 34, 30, 0.88);
    backdrop-filter: blur(10px);
    -webkit-backdrop-filter: blur(10px);
}

.collection-viewer__panel {
    position: relative;
    z-index: 1;
    display: flex;
    flex-direction: column;
    width: min(1200px, 100%);
    max-height: min(92vh, calc(100dvh - 1.5rem));
    overflow: hidden;
    background: var(--bg-primary);
    box-shadow: 0 40px 80px rgba(45, 34, 30, 0.35);
    transform: translateY(16px);
    transition: transform 0.5s var(--ease-cinematic);
}

.collection-viewer.is-open .collection-viewer__panel {
    transform: translateY(0);
}

.collection-viewer__close {
    position: absolute;
    top: var(--space-sm);
    right: var(--space-sm);
    z-index: 3;
    width: 2.5rem;
    height: 2.5rem;
    display: flex;
    align-items: center;
    justify-content: center;
    background: none;
    border: none;
    color: var(--text-primary);
    cursor: pointer;
    transition: color 0.3s ease;
}

.collection-viewer__close:hover {
    color: var(--accent-gold);
}

.collection-viewer__close svg {
    width: 1.25rem;
    height: 1.25rem;
}

.collection-viewer__scroll {
    flex: 1 1 auto;
    min-height: 0;
    overflow-x: hidden;
    overflow-y: auto;
    scroll-behavior: smooth;
    overscroll-behavior: contain;
    -webkit-overflow-scrolling: touch;
    padding: clamp(2rem, 4vw, 3rem);
    padding-top: clamp(3rem, 5vw, 3.5rem);
}

.collection-viewer__intro {
    margin-bottom: clamp(1.5rem, 3vw, 2.25rem);
    max-width: 52ch;
}

.collection-viewer__intro h2 {
    margin-top: 0.35rem;
}

.collection-viewer__grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(min(100%, 240px), 1fr));
    gap: clamp(0.85rem, 2vw, 1.25rem);
}

.collection-viewer__item {
    margin: 0;
}

.collection-viewer__thumb {
    display: block;
    width: 100%;
    padding: 0;
    border: none;
    cursor: pointer;
    background: var(--bg-tertiary);
    aspect-ratio: 3 / 2;
    overflow: hidden;
    transition: box-shadow 0.35s var(--ease-cinematic);
}

.collection-viewer__thumb img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    object-position: center;
    display: block;
    transition: transform 0.55s var(--ease-cinematic);
}

.collection-viewer__thumb:hover img,
.collection-viewer__thumb:focus-visible img {
    transform: scale(1.04);
}

.collection-viewer__thumb:focus-visible {
    outline: 2px solid var(--accent-gold);
    outline-offset: 2px;
}

.collection-viewer__caption {
    margin-top: 0.5rem;
    font-size: 0.68rem;
    letter-spacing: 0.12em;
    text-transform: uppercase;
    color: var(--text-muted);
    line-height: 1.3;
}

/* Single image stage */
.collection-viewer__stage {
    position: fixed;
    inset: 0;
    z-index: 10000;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: var(--space-md);
    background: rgba(45, 34, 30, 0.94);
}

.collection-viewer__stage[hidden] {
    display: none;
}

.collection-viewer__stage-img {
    max-width: min(94vw, 1100px);
    max-height: 88vh;
    width: auto;
    height: auto;
    object-fit: contain;
}

.collection-viewer__stage-close {
    position: absolute;
    top: var(--space-sm);
    right: var(--space-sm);
    width: 2.5rem;
    height: 2.5rem;
    display: flex;
    align-items: center;
    justify-content: center;
    background: rgba(233, 227, 211, 0.12);
    border: 1px solid rgba(244, 239, 227, 0.2);
    border-radius: 50%;
    color: var(--text-on-media);
    cursor: pointer;
}

.collection-viewer__stage-close svg {
    width: 1.1rem;
    height: 1.1rem;
}

@media (max-width: 767px) {
    .collection-viewer__grid {
        grid-template-columns: repeat(2, 1fr);
        gap: 0.65rem;
    }

    .collection-viewer__caption {
        font-size: 0.6rem;
    }
}