/* Quiet, shared attachment chrome. Media keeps its natural color and proportions. */
#fileOverlay, #filePreviewModal {
    background: rgba(12, 17, 25, .76);
    -webkit-backdrop-filter: blur(16px);
    backdrop-filter: blur(16px);
    color: #f3f6fb;
}
#fileOverlay {
    box-sizing: border-box;
    height: 100dvh;
    padding: calc(98px + env(safe-area-inset-top, 0px)) max(20px, env(safe-area-inset-right, 0px)) max(20px, env(safe-area-inset-bottom, 0px)) max(20px, env(safe-area-inset-left, 0px));
    cursor: default;
}
#fileOverlay .file-overlay-controls {
    position: absolute;
    top: calc(16px + env(safe-area-inset-top, 0px));
    left: max(20px, env(safe-area-inset-left, 0px));
    right: max(20px, env(safe-area-inset-right, 0px));
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 20px;
    padding: 10px 12px 10px 18px;
    border: 1px solid rgba(255,255,255,.13);
    border-radius: 16px;
    background: rgba(255,255,255,.055);
}
.attachment-viewer-identity { min-width: 0; display: flex; flex-direction: column; gap: 4px; }
#attachmentViewerName { font-size: 15px; font-weight: 600; overflow: hidden; white-space: nowrap; text-overflow: ellipsis; }
#attachmentViewerDetails { font-size: 12px; color: #b8c2d1; }
.attachment-viewer-actions, .attachment-viewer-zoom { display: flex; align-items: center; gap: 8px; flex-shrink: 0; }
#fileOverlay [hidden], #filePreviewModal [hidden] { display: none !important; }
#fileOverlay button, #filePreviewModal .file-preview-controls button, .pdf-viewer-toolbar button {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    min-height: 44px;
    padding: 10px 14px;
    border: 1px solid rgba(255,255,255,.18);
    border-radius: 10px;
    background: rgba(255,255,255,.09);
    color: #f3f6fb;
    font: inherit;
    font-size: 14px;
    font-weight: 600;
    cursor: pointer;
    box-shadow: none;
    transform: none;
    transition: background-color .15s ease;
}
#fileOverlay button:hover, #filePreviewModal .file-preview-controls button:hover, .pdf-viewer-toolbar button:hover { background: rgba(255,255,255,.17); transform: none; }
#fileOverlay button:focus-visible, #filePreviewModal button:focus-visible, .pdf-continuous-scroll:focus-visible { outline: 2px solid #a8c5ff; outline-offset: 3px; }
#fileOverlay button:disabled, .pdf-viewer-toolbar button:disabled { opacity: .5; cursor: default; }
#fileOverlay .viewer-download, #filePreviewModal #downloadFileBtn, #filePreviewModal .viewer-download {
    background: #eaf1ff; border-color: transparent; color: #192b48;
}
#fileOverlay .viewer-download:hover, #filePreviewModal .viewer-download:hover, #filePreviewModal #downloadFileBtn:hover { background: #fff; }
#fileOverlay svg, #filePreviewModal .file-preview-controls svg, .pdf-viewer-toolbar svg { width: 19px; height: 19px; flex: 0 0 19px; }
#fileOverlay .viewer-icon-button { width: 44px; padding: 10px; border-color: transparent; background: transparent; }
#fileOverlay .file-overlay-content { width: 100%; height: 100%; max-width: 100%; max-height: 100%; min-height: 0; overflow: hidden; }
#fileOverlay .file-overlay-content > img, #fileOverlay .file-overlay-content > video { max-width: 100% !important; max-height: 100% !important; border-radius: 8px; object-fit: contain; box-shadow: 0 12px 50px rgba(0,0,0,.25); }
#fileOverlay audio { max-width: min(100%, 560px); }
.pdf-canvas-preview { width: min(100%,1100px); height: 100%; display: flex; flex-direction: column; overflow: hidden; color: #f3f6fb; background: transparent; }
.pdf-viewer-toolbar { display: flex; align-items: center; justify-content: space-between; flex-shrink: 0; gap: 12px; padding: 0 12px 12px; font-size: 13px; color: #c7d0df; }
.pdf-continuous-scroll { overflow: auto; flex: 1; min-height: 0; padding: 12px; overscroll-behavior: contain; scrollbar-color: #687386 transparent; scrollbar-width: thin; }
.pdf-page { box-shadow: 0 8px 30px rgba(0,0,0,.2); }
#filePreviewModal .file-preview-modal-content { background: rgba(24,31,43,.92); border: 1px solid rgba(255,255,255,.15); border-radius: 18px; max-height: 92dvh; overflow: auto; }
#filePreviewModal .modal-header, #filePreviewModal .file-preview-container, #filePreviewModal .file-preview-info { background: transparent; }
#filePreviewModal .modal-header { gap: 16px; }
#filePreviewModal .modal-header h3 { min-width: 0; font-size: 15px; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
#filePreviewModal .file-preview-controls { gap: 8px; flex-shrink: 0; }
#filePreviewModal .pdf-preview-compact { height: 50vh; max-width: 100%; }
@media (max-width: 600px) {
    #fileOverlay { padding: calc(134px + env(safe-area-inset-top, 0px)) 8px max(8px, env(safe-area-inset-bottom, 0px)); }
    #fileOverlay .file-overlay-controls { left: max(8px, env(safe-area-inset-left, 0px)); right: max(8px, env(safe-area-inset-right, 0px)); top: calc(8px + env(safe-area-inset-top, 0px)); padding: 10px 12px; gap: 8px; flex-wrap: wrap; }
    .attachment-viewer-identity { width: 100%; }
    .attachment-viewer-actions { width: 100%; justify-content: flex-end; }
    .attachment-viewer-zoom { margin-right: auto; gap: 0; }
    #fileOverlay .viewer-icon-button { width: 40px; }
    #fileOverlay button { padding: 10px 12px; }
    .pdf-viewer-toolbar { padding: 0 12px 8px; }
    #filePreviewModal .modal-header { flex-wrap: wrap; padding: 12px; }
    #filePreviewModal .file-preview-container { padding: 8px; }
}
@media (prefers-reduced-motion: reduce) { #fileOverlay button { transition: none; } }
@media (max-width: 380px) {
    #fileOverlay[data-viewer-type="image"] { padding-top: calc(186px + env(safe-area-inset-top, 0px)); }
    #fileOverlay[data-viewer-type="image"] .attachment-viewer-actions { flex-wrap: wrap; }
    #fileOverlay[data-viewer-type="image"] .attachment-viewer-zoom { width: 100%; }
}