/* ==========================================================================
   Photos.app — certificate & workspace gallery
   ========================================================================== */

.photos-sidebar { width: 190px; }

.photos-sidebar .sidebar-item { position: relative; }

.photos-count {
    margin-left: auto;
    font-size: 11px;
    color: #8a8a8f;
    background: rgba(255, 255, 255, 0.09);
    border-radius: 9px;
    padding: 1px 7px;
}

.photos-main {
    flex: 1;
    overflow-y: auto;
    padding: 18px;
    background: rgba(0, 0, 0, 0.18);
}

.photos-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(190px, 1fr));
    gap: 18px;
}

.photo-tile {
    margin: 0;
    cursor: pointer;
    border-radius: 9px;
    padding: 7px;
    transition: background 0.14s ease, transform 0.14s ease;
}

.photo-tile:hover {
    background: rgba(255, 255, 255, 0.07);
    transform: translateY(-2px);
}

.photo-tile:focus-visible {
    outline: 2px solid var(--accent);
    outline-offset: 1px;
}

.photo-tile-frame {
    aspect-ratio: 4 / 3;
    border-radius: 6px;
    overflow: hidden;
    background: #fff;
    box-shadow: 0 4px 14px rgba(0, 0, 0, 0.42);
    display: flex;
    align-items: center;
    justify-content: center;
}

.photo-tile-frame img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    object-position: top center;
}

.photo-tile figcaption {
    display: flex;
    flex-direction: column;
    gap: 1px;
    margin-top: 9px;
}

.photo-tile-title {
    font-size: 12.5px;
    font-weight: 500;
    color: #f0f0f2;
    line-height: 1.3;
}

.photo-tile-issuer {
    font-size: 11px;
    color: #8a8a8f;
}

/* ── Lightbox ───────────────────────────────────────────────────────────── */

.photo-lightbox {
    position: absolute;
    inset: 0;
    background: rgba(0, 0, 0, 0.86);
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
    display: flex;
    flex-direction: column;
    z-index: 40;
    opacity: 0;
    pointer-events: none;
    transition: opacity 0.16s ease;
}

.photo-lightbox.active {
    opacity: 1;
    pointer-events: auto;
}

.photo-lightbox-stage {
    flex: 1;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 46px 62px 12px;
    min-height: 0;
}

.photo-lightbox-stage img {
    max-width: 100%;
    max-height: 100%;
    object-fit: contain;
    border-radius: 4px;
    box-shadow: 0 16px 44px rgba(0, 0, 0, 0.6);
}

.photo-lightbox-close {
    position: absolute;
    top: 12px;
    right: 14px;
    width: 28px;
    height: 28px;
    border: none;
    border-radius: 50%;
    background: rgba(255, 255, 255, 0.13);
    color: #fff;
    font-size: 17px;
    line-height: 1;
    cursor: pointer;
}

.photo-lightbox-close:hover { background: rgba(255, 255, 255, 0.24); }

.photo-lightbox-nav {
    position: absolute;
    top: 50%;
    transform: translateY(-50%);
    width: 38px;
    height: 38px;
    border: none;
    border-radius: 50%;
    background: rgba(255, 255, 255, 0.11);
    color: #fff;
    cursor: pointer;
    z-index: 2;
}

.photo-lightbox-nav:hover { background: rgba(255, 255, 255, 0.22); }
.photo-lightbox-nav.prev { left: 12px; }
.photo-lightbox-nav.next { right: 12px; }

.photo-lightbox-bar {
    flex-shrink: 0;
    display: flex;
    align-items: center;
    gap: 14px;
    padding: 12px 18px;
    background: rgba(0, 0, 0, 0.5);
    border-top: 1px solid rgba(255, 255, 255, 0.1);
}

.photo-lightbox-meta { flex: 1; min-width: 0; }

.photo-lightbox-title {
    font-size: 13.5px;
    font-weight: 600;
    color: #fff;
}

.photo-lightbox-issuer {
    font-size: 11.5px;
    color: #9a9a9f;
}

.photo-lightbox-counter {
    font-size: 11.5px;
    color: #8a8a8f;
    font-variant-numeric: tabular-nums;
}

@media (max-width: 768px) {
    .photos-grid { grid-template-columns: repeat(auto-fill, minmax(140px, 1fr)); gap: 12px; }
    .photo-lightbox-stage { padding: 40px 14px 8px; }
    .photo-lightbox-nav { width: 32px; height: 32px; }
}

@media (prefers-reduced-motion: reduce) {
    .photo-tile, .photo-lightbox { transition: none; }
    .photo-tile:hover { transform: none; }
}