#pdfMetadataViewerTool {
    --pmv-border: #dbe3ea;
    --pmv-surface: #f8fafc;
    --pmv-muted: #5b6878;
    --pmv-accent: #0d6efd;
}

#pdfMetadataViewerTool .drop-zone {
    border: 2px dashed #9fb3c8;
    border-radius: 12px;
    background: linear-gradient(145deg, #f7fbff, #edf4fb);
    min-height: 210px;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    text-align: center;
    padding: 1.25rem;
    transition: border-color 0.2s ease, transform 0.2s ease;
}

#pdfMetadataViewerTool .drop-zone.is-dragover {
    border-color: var(--pmv-accent);
    transform: translateY(-1px);
}

#pdfMetadataViewerTool .stat-box {
    border: 1px solid var(--pmv-border);
    border-radius: 10px;
    background: #fff;
    padding: 0.75rem;
    height: 100%;
}

#pdfMetadataViewerTool .stat-key {
    color: var(--pmv-muted);
    font-size: 0.8rem;
    margin-bottom: 0.25rem;
}

#pdfMetadataViewerTool .stat-value {
    font-weight: 700;
    word-break: break-word;
}

#pdfMetadataViewerTool .thumb-shell {
    border: 1px solid var(--pmv-border);
    border-radius: 10px;
    overflow: hidden;
    background: #fff;
    display: inline-block;
    max-width: 180px;
}

#pdfMetadataViewerTool #thumbCanvas {
    display: block;
    width: 100%;
    height: auto;
}

#pdfMetadataViewerTool .metadata-search {
    max-width: 420px;
}

#pdfMetadataViewerTool .metadata-table td {
    vertical-align: middle;
}

#pdfMetadataViewerTool .metadata-table .meta-key {
    width: 32%;
    min-width: 170px;
    font-weight: 600;
}

#pdfMetadataViewerTool .metadata-table .meta-value {
    width: 50%;
    word-break: break-word;
}

#pdfMetadataViewerTool .metadata-table .meta-copy {
    width: 18%;
    min-width: 90px;
    text-align: right;
}

#pdfMetadataViewerTool .meta-row.missing .meta-value {
    color: #b02a37;
    font-style: italic;
}

#pdfMetadataViewerTool .meta-row.suspicious .meta-value {
    color: #995c00;
}

#pdfMetadataViewerTool .json-shell {
    max-height: 260px;
    overflow: auto;
    border: 1px solid var(--pmv-border);
    border-radius: 8px;
    background: var(--pmv-surface);
    padding: 0.75rem;
    margin-top: 0.5rem;
    font-size: 0.82rem;
}

#pdfMetadataViewerTool .loading-block {
    min-height: 110px;
    display: flex;
    align-items: center;
    justify-content: center;
    flex-direction: column;
}

#pdfMetadataViewerTool .small-note {
    color: var(--pmv-muted);
    font-size: 0.9rem;
}

@media (max-width: 768px) {
    #pdfMetadataViewerTool .metadata-table .meta-key,
    #pdfMetadataViewerTool .metadata-table .meta-value,
    #pdfMetadataViewerTool .metadata-table .meta-copy {
        width: auto;
        min-width: 0;
    }
}

@media (prefers-color-scheme: dark) {
    #pdfMetadataViewerTool {
        --pmv-border: #3a4a5f;
        --pmv-surface: #1f2a38;
        --pmv-muted: #a8bdd1;
        --pmv-accent: #60a5fa;
    }

    #pdfMetadataViewerTool .drop-zone {
        background: linear-gradient(145deg, #243244, #1d2938);
        border-color: #517192;
        color: #e6eef7;
    }

    #pdfMetadataViewerTool .stat-box,
    #pdfMetadataViewerTool .thumb-shell {
        background: #111a24;
    }
}