/* arsip section: photo mosaic + CSS-only (:target) lightbox. Layered over acg.css. */

.arsip {
    --c: var(--pink);
}

.arsip__squares {
    right: 1%;
    top: 24px;
    opacity: 0.55;
    z-index: 0;
}

.arsip .section__head,
.arsip__grid {
    position: relative;
    z-index: 1;
}

.arsip__grid {
    list-style: none;
    margin: 0;
    padding: 0;
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    grid-auto-rows: clamp(120px, 15vw, 190px);
    gap: clamp(10px, 1.4vw, 18px);
}

.arsip__item {
    overflow: hidden;
    border-radius: var(--radius-sm);
    transition: transform 0.5s var(--ease-out), box-shadow 0.5s var(--ease-out);
}

.arsip__item--1 { grid-column: span 2; grid-row: span 2; }
.arsip__item--2 { grid-row: span 2; }
.arsip__item--5,
.arsip__item--6,
.arsip__item--7,
.arsip__item--8 { grid-column: span 2; }

.arsip__link {
    position: relative;
    display: block;
    height: 100%;
    color: inherit;
    text-decoration: none;
}

.arsip__link img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    display: block;
    transition: transform 0.8s var(--ease-out);
}

.arsip__item--2 img { object-position: center 30%; }

.arsip__caption {
    position: absolute;
    inset: auto 0 0;
    padding: 36px 16px 14px;
    font-size: 13px;
    font-weight: 500;
    color: var(--text);
    background: linear-gradient(to top, rgba(6, 10, 42, 0.85), transparent);
    opacity: 0;
    transform: translateY(8px);
    transition: opacity 0.4s var(--ease-out), transform 0.4s var(--ease-out);
}

.arsip__item:hover,
.arsip__item:focus-within {
    transform: translateY(-4px);
    box-shadow: var(--glass-shadow), var(--milky-edge), 0 0 36px color-mix(in srgb, var(--c) 40%, transparent);
}

.arsip__item:hover img,
.arsip__item:focus-within img { transform: scale(1.05); }

.arsip__item:hover .arsip__caption,
.arsip__item:focus-within .arsip__caption {
    opacity: 1;
    transform: none;
}

.arsip__link:focus-visible {
    outline: 2px solid var(--sky);
    outline-offset: -2px;
}

/* Lightbox */

.arsip__lb {
    position: fixed;
    inset: 0;
    z-index: 100;
    display: none;
    place-items: center;
    padding: clamp(56px, 8vw, 80px) var(--gutter);
    background: rgba(6, 10, 42, 0.88);
    -webkit-backdrop-filter: blur(14px);
    backdrop-filter: blur(14px);
}

.arsip__lb:target {
    display: grid;
    animation: arsip-fade 0.35s var(--ease-out);
}

.arsip__backdrop {
    position: absolute;
    inset: 0;
    cursor: zoom-out;
}

.arsip__stage {
    position: relative;
    display: grid;
    gap: 12px;
    justify-items: center;
    max-width: min(100%, 1200px);
    max-height: 100%;
}

.arsip__stage img {
    max-width: 100%;
    max-height: calc(100vh - 190px);
    width: auto;
    height: auto;
    border-radius: var(--radius-sm);
    box-shadow: var(--glow-strong);
}

.arsip__stage figcaption {
    color: var(--text-2);
    font-size: 14px;
    text-align: center;
}

.arsip__stage figcaption span {
    margin-left: 8px;
    color: var(--text-3);
}

.arsip__btn {
    position: absolute;
    display: grid;
    place-items: center;
    width: 48px;
    height: 48px;
    border-radius: 50%;
    font-size: 28px;
    line-height: 1;
    color: var(--text);
    text-decoration: none;
    transition: transform 0.3s var(--ease-spring), box-shadow 0.3s var(--ease-out);
}

.arsip__btn:hover,
.arsip__btn:focus-visible {
    transform: scale(1.1);
    box-shadow: var(--glow-strong);
}

.arsip__btn--close { top: 16px; right: var(--gutter); }
.arsip__btn--prev { left: var(--gutter); top: 50%; margin-top: -24px; }
.arsip__btn--next { right: var(--gutter); top: 50%; margin-top: -24px; }

@keyframes arsip-fade {
    from { opacity: 0; }
}

@supports (animation-timeline: view()) {
    .arsip__item.reveal { animation-range: entry 0% entry 60%; }
}

@media (max-width: 1000px) {
    .arsip__grid { grid-template-columns: repeat(2, 1fr); grid-auto-rows: clamp(130px, 28vw, 220px); }
    .arsip__item--1 { grid-column: span 2; }
    .arsip__item--2 { grid-column: auto; }
    .arsip__item--5,
    .arsip__item--6,
    .arsip__item--7,
    .arsip__item--8 { grid-column: auto; }
}

@media (max-width: 640px) {
    /* Phone: park the decoration at the top-right corner, clear of the title. */
    .arsip__squares {
        right: -18px;
        top: -24px;
        opacity: 0.35;
    }

    .arsip__item { border-radius: 12px; }
    .arsip__caption { opacity: 1; transform: none; font-size: 11px; padding: 24px 10px 8px; }
    .arsip__btn { width: 42px; height: 42px; }
    .arsip__btn--prev,
    .arsip__btn--next { top: auto; bottom: 20px; margin-top: 0; }
    .arsip__btn--prev { left: calc(50% - 54px); }
    .arsip__btn--next { right: calc(50% - 54px); }
}

@media (hover: none) {
    .arsip__item:hover { transform: none; }
}

@media (prefers-reduced-motion: reduce) {
    .arsip__item,
    .arsip__link img,
    .arsip__caption,
    .arsip__btn { transition: none; }
    .arsip__lb:target { animation: none; }
}