.photo-viewer {
    position: fixed;
    inset: 0;
    z-index: 1000;
    display: grid;
    grid-template-rows: auto minmax(0, 1fr) auto;
    height: 100vh;
    height: 100dvh;
    color: #f3f0e9;
    background: rgba(23, 24, 22, .985);
    opacity: 0;
    transition: opacity 180ms ease;
    overflow: hidden;
    font: 14px/1.5 -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Microsoft YaHei", sans-serif;
    -webkit-tap-highlight-color: transparent;
}
.photo-viewer.is-visible { opacity: 1; }
.photo-viewer * { box-sizing: border-box; }
.photo-viewer [hidden] { display: none !important; }
.viewer-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 16px;
    padding: max(20px, env(safe-area-inset-top)) max(30px, env(safe-area-inset-right)) 16px max(30px, env(safe-area-inset-left));
    position: relative;
    z-index: 2;
}
.viewer-heading, .viewer-toolbar { display: flex; align-items: center; }
.viewer-heading { gap: 22px; min-width: 0; }
.viewer-count { font-variant-numeric: tabular-nums; letter-spacing: .12em; font-size: 12px; white-space: nowrap; }
.viewer-date { color: #95978f; font-size: 12px; letter-spacing: .06em; white-space: nowrap; }
.viewer-toolbar { gap: 8px; }
.viewer-button {
    display: inline-flex;
    flex-shrink: 0;
    align-items: center;
    justify-content: center;
    width: 42px;
    height: 42px;
    padding: 0;
    border: 1px solid rgba(245, 242, 233, .13);
    border-radius: 50%;
    background: rgba(23, 24, 22, .7);
    color: #eae8df;
    cursor: pointer;
    text-decoration: none;
    transition: color 150ms, background 150ms, border-color 150ms;
    touch-action: manipulation;
}
.viewer-button:hover { color: #fff; background: #353730; border-color: #797c70; }
.viewer-button:focus-visible { outline: 2px solid #d4dda6; outline-offset: 4px; }
.viewer-button:disabled { opacity: .3; cursor: default; }
.viewer-button:disabled:hover { background: rgba(23, 24, 22, .7); border-color: rgba(245, 242, 233, .13); }
.viewer-close { margin-left: 12px; }
.viewer-stage {
    position: relative;
    display: grid;
    place-items: center;
    min-height: 0;
    overflow: hidden;
    touch-action: none;
}
.viewer-image {
    display: block;
    grid-area: 1 / 1;
    object-fit: contain;
    cursor: grab;
    transform-origin: center;
    user-select: none;
    -webkit-user-select: none;
    -webkit-user-drag: none;
    touch-action: none;
    will-change: transform;
}
.viewer-image.is-dragging { cursor: grabbing; }
.viewer-previous, .viewer-next { position: absolute; top: 50%; transform: translateY(-50%); width: 44px; height: 44px; z-index: 1; backdrop-filter: blur(12px); }
.viewer-previous { left: max(24px, env(safe-area-inset-left)); }
.viewer-next { right: max(24px, env(safe-area-inset-right)); }
.viewer-status {
    position: absolute;
    bottom: 22px;
    left: 50%;
    transform: translateX(-50%);
    margin: 0;
    padding: 8px 16px;
    border: 1px solid rgba(255, 255, 255, .1);
    border-radius: 20px;
    background: rgba(23, 24, 22, .88);
    color: #cbcfc0;
    font-size: 12px;
    text-align: center;
    max-width: calc(100% - 30px);
    width: max-content;
    pointer-events: none;
}
.viewer-status.is-error { color: #e7caa6; }
.viewer-footer {
    display: grid;
    grid-template-columns: minmax(0, 1fr) auto minmax(0, 1fr);
    align-items: center;
    gap: 24px;
    padding: 22px max(30px, env(safe-area-inset-right)) max(24px, env(safe-area-inset-bottom)) max(30px, env(safe-area-inset-left));
    position: relative;
    z-index: 2;
}
.viewer-filename { color: #8f9388; font-size: 11px; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.viewer-details { display: flex; gap: 32px; margin: 0; }
.viewer-details div { display: flex; flex-direction: column; gap: 3px; }
.viewer-details dt { color: #83877b; font-size: 10px; letter-spacing: .08em; }
.viewer-details dd { margin: 0; color: #e3e5d9; font-size: 12px; font-variant-numeric: tabular-nums; white-space: nowrap; }
.viewer-hint { justify-self: end; color: #797e70; font-size: 10px; white-space: nowrap; }
@media (max-width: 900px) {
    .viewer-footer { grid-template-columns: minmax(0, 1fr) auto; }
    .viewer-hint { display: none; }
    .viewer-details { gap: 24px; }
}
@media (max-width: 600px) {
    .viewer-header { padding: max(14px, env(safe-area-inset-top)) 14px 12px; gap: 8px; }
    .viewer-heading { flex-direction: column; align-items: flex-start; gap: 3px; }
    .viewer-count { font-size: 11px; }
    .viewer-date { font-size: 10px; }
    .viewer-toolbar { gap: 5px; }
    .viewer-button { width: 38px; height: 38px; }
    .viewer-close { margin-left: 4px; }
    .viewer-previous, .viewer-next { top: auto; bottom: 18px; transform: none; width: 38px; height: 38px; }
    .viewer-previous { left: 15px; }
    .viewer-next { right: 15px; }
    .viewer-status { bottom: 20px; max-width: calc(100% - 124px); font-size: 10px; padding: 7px 10px; }
    .viewer-footer { display: flex; flex-direction: column; gap: 13px; padding: 14px 16px max(20px, env(safe-area-inset-bottom)); }
    .viewer-filename { max-width: 100%; font-size: 10px; order: 2; }
    .viewer-details { justify-content: center; gap: 28px; }
    .viewer-details dt { font-size: 9px; }
    .viewer-details dd { font-size: 11px; }
}
@media (max-height: 500px) and (orientation: landscape) {
    .viewer-header { padding: max(8px, env(safe-area-inset-top)) max(16px, env(safe-area-inset-right)) 8px max(16px, env(safe-area-inset-left)); }
    .viewer-heading { flex-direction: row; align-items: center; gap: 16px; }
    .viewer-button { width: 38px; height: 38px; }
    .viewer-footer { display: flex; flex-direction: row; justify-content: center; gap: 16px; padding: 8px 16px max(8px, env(safe-area-inset-bottom)); }
    .viewer-filename, .viewer-hint { display: none; }
    .viewer-details { gap: 24px; }
    .viewer-details div { flex-direction: row; align-items: baseline; gap: 7px; }
    .viewer-previous, .viewer-next { top: 50%; bottom: auto; transform: translateY(-50%); }
    .viewer-status { bottom: 10px; }
}
@media (prefers-reduced-motion: reduce) {
    .photo-viewer, .photo-viewer * { transition: none !important; }
}