.message-content img.msg-media,
.msg-attachment img,
#attachTray .attach-item img,
img.run-image {
    cursor: zoom-in;
}

.message-content a img.msg-media {
    cursor: pointer;
}

html.viewer-open,
html.viewer-open body {
    overflow: hidden;
}

.viewer {
    --viewer-fade: 1;
    position: fixed;
    inset: 0;
    z-index: 70;
    display: flex;
    align-items: center;
    justify-content: center;
    background: rgba(0, 0, 0, calc(0.85 * var(--viewer-fade)));
    touch-action: none;
    overscroll-behavior: contain;
    -webkit-tap-highlight-color: transparent;
    cursor: pointer;
}

.viewer[hidden] {
    display: none;
}

.viewer-img {
    max-width: 90vw;
    max-height: 90vh;
    max-height: 90dvh;
    object-fit: contain;
    border: 1px solid rgba(255, 255, 255, 0.12);
    border-radius: var(--radius, 12px);
    box-shadow: 0 8px 32px rgba(0, 0, 0, 0.5);
    touch-action: none;
    user-select: none;
    -webkit-user-select: none;
    -webkit-user-drag: none;
    transform-origin: center center;
    will-change: transform;
    cursor: zoom-in;
}

.viewer.is-zoomed .viewer-img {
    cursor: grab;
}

.viewer-img.is-animating {
    transition: transform 0.25s ease;
}

.viewer-img.is-fading {
    opacity: 0;
    transition: opacity 0.12s linear, transform 0.18s ease;
}

.viewer-btn {
    position: absolute;
    top: calc(20px + env(safe-area-inset-top, 0px));
    width: 40px;
    height: 40px;
    padding: 0;
    display: flex;
    align-items: center;
    justify-content: center;
    color: #fff;
    background: rgba(20, 20, 35, 0.8);
    border: 1px solid rgba(255, 255, 255, 0.12);
    border-radius: 50%;
    cursor: pointer;
    z-index: 1;
    transition: background 0.15s ease, border-color 0.15s ease;
}

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

.viewer-btn:hover,
.viewer-btn:focus-visible {
    background: rgba(255, 255, 255, 0.1);
    border-color: rgba(255, 255, 255, 0.2);
}

.viewer-btn:focus-visible {
    outline: 2px solid var(--primary);
    outline-offset: 2px;
}

.viewer-btn:disabled {
    opacity: 0.5;
    cursor: progress;
}

.viewer-close {
    right: calc(20px + env(safe-area-inset-right, 0px));
}

.viewer-save {
    right: calc(70px + env(safe-area-inset-right, 0px));
}

.viewer-nav {
    top: 50%;
    width: 44px;
    height: 44px;
    transform: translateY(-50%);
}

.viewer-prev {
    left: calc(20px + env(safe-area-inset-left, 0px));
}

.viewer-next {
    right: calc(20px + env(safe-area-inset-right, 0px));
}

.viewer-prev svg {
    transform: rotate(90deg);
}

.viewer-next svg {
    transform: rotate(-90deg);
}

.viewer-count {
    position: absolute;
    left: 0;
    right: 0;
    bottom: calc(28px + env(safe-area-inset-bottom, 0px));
    text-align: center;
    color: rgba(255, 255, 255, 0.7);
    font-size: 13px;
    pointer-events: none;
}

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

@media (prefers-reduced-motion: reduce) {
    .viewer-img.is-animating,
    .viewer-img.is-fading,
    .viewer-btn {
        transition: none;
    }
}