/* ---------- File preview panel ---------- */

.file-preview-panel {
    /* Override the default sidebar-section padding — the header needs edge-to-edge
       treatment; the body handles its own padding per plugin. */
    padding: 0;
    display: flex;
    flex-direction: column;
    overflow: hidden;
    /* Fill the available sidebar height so plugins (especially the
       spreadsheet grid) can have an internal scroller. Without this,
       the panel grows with its content and the sidebar — not the grid
       — becomes the scrollable area. */
    flex: 1;
    min-height: 0;
}

.preview-header {
    display: flex;
    align-items: center;
    gap: var(--sm);
    padding: 10px var(--md);
    border-bottom: 1px solid var(--color-border-light);
    flex-shrink: 0;
}

.preview-filename {
    flex: 1;
    font-size: 12px;
    font-weight: 500;
    color: var(--color-text-primary);
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
    min-width: 0;
}

.preview-dl {
    flex-shrink: 0;
    font-size: 12px;
    text-decoration: none;
}

.preview-body {
    flex: 1;
    overflow-y: auto;
    overflow-x: hidden;
    min-height: 0;
}

/* Loading / error / hint states (shared across plugins) */
.preview-loading,
.preview-error,
.preview-hint {
    font-size: 12px;
    padding: var(--md);
    margin: 0;
    color: var(--color-text-secondary);
}
.preview-error { color: var(--color-error); }

/* Image plugin */
.preview-image { display: flex; align-items: flex-start; justify-content: center; padding: var(--sm); }
.preview-image-el {
    max-width: 100%;
    height: auto;
    border-radius: var(--radius-sm);
    display: block;
}

/* Pages plugin — long vertical scroll of page renders */
.preview-pages { display: flex; flex-direction: column; gap: 6px; padding: var(--sm); }
.preview-page-wrapper { line-height: 0; }
.preview-page-img {
    width: 100%;
    height: auto;
    display: block;
    border-radius: 2px;
    background: #2a2a2a;
}

/* Text plugin */
.preview-text-wrap { padding: var(--sm); }
.preview-text {
    font: 11px/1.5 ui-monospace, "SF Mono", Menlo, monospace;
    color: var(--color-text-primary);
    white-space: pre-wrap;
    overflow-wrap: anywhere;
    margin: 0;
    padding: var(--sm);
    background: var(--color-bg);
    border-radius: var(--radius-sm);
}

/* CAD plugin */
.preview-cad {
    display: flex;
    align-items: center;
    justify-content: center;
    padding: var(--sm);
    background: #1a1a1a;
}
.preview-cad-canvas {
    display: block;
    max-width: 100%;
    border-radius: var(--radius-sm);
    cursor: grab;
    touch-action: none;
}
.preview-cad-canvas:active { cursor: grabbing; }

/* Unsupported plugin */
.preview-unsupported { padding: var(--md); }

/* Email plugin */
.preview-email { padding: 0; }
.email-view { display: flex; flex-direction: column; }

.email-headers {
    padding: 12px 14px;
    border-bottom: 1px solid var(--color-border-light);
    background: var(--color-bg);
}
.email-subject {
    margin: 0 0 8px;
    font-size: 14px;
    font-weight: 600;
    color: var(--color-text-primary);
    text-transform: none;
    letter-spacing: 0;
    display: block;
}
.email-fields {
    margin: 0;
    display: grid;
    grid-template-columns: max-content 1fr;
    gap: 3px 10px;
    font-size: 11px;
}
.email-fields dt {
    color: var(--color-text-secondary);
    font-weight: 500;
    text-transform: uppercase;
    letter-spacing: 0.03em;
}
.email-fields dd {
    margin: 0;
    color: var(--color-text-primary);
    overflow-wrap: anywhere;
}

.email-attachments {
    padding: 8px 14px;
    border-bottom: 1px solid var(--color-border-light);
    background: var(--color-bg-elevated);
}
.email-att-label {
    margin: 0 0 4px;
    font-size: 11px;
    font-weight: 500;
    color: var(--color-text-secondary);
    text-transform: uppercase;
    letter-spacing: 0.03em;
}
.email-att-list {
    list-style: none;
    margin: 0;
    padding: 0;
    font-size: 12px;
}
.email-att-list li { padding: 2px 0; }
.email-att-name { color: var(--color-text-primary); }
.email-att-meta { color: var(--color-text-secondary); font-size: 11px; }

.email-body { padding: 0; }
.email-html-frame {
    width: 100%;
    /* Sandboxed iframe can't message its size out; pick a tall fixed
       max so the body scrolls inside the frame for long emails. */
    height: 70vh;
    border: 0;
    background: #fff;
    display: block;
}
.email-text {
    font: 12px/1.5 ui-monospace, "SF Mono", Menlo, monospace;
    color: var(--color-text-primary);
    white-space: pre-wrap;
    overflow-wrap: anywhere;
    margin: 0;
    padding: 12px 14px;
    background: var(--color-bg);
}

/* Spreadsheet plugin — Excel-style grid with column letters, row
   numbers, and a sheet-tab strip. The whole pane is the scroller so
   the column / row headers stay aligned with the cell grid. */
.preview-spreadsheet {
    display: flex;
    flex-direction: column;
    height: 100%;
    padding: 0;
}

/* Sheet-tab strip. Mirrors the Excel bottom-tab idiom but lives at the
   top so it stays in view while the cell grid scrolls below. */
.preview-sheet-tabs {
    display: flex;
    gap: 2px;
    padding: 6px 8px 0;
    background: var(--color-bg);
    border-bottom: 1px solid var(--color-border-light);
    overflow-x: auto;
    flex-shrink: 0;
}
.preview-sheet-tab {
    background: var(--color-bg-elevated);
    color: var(--color-text-secondary);
    border: 1px solid var(--color-border-light);
    border-bottom: none;
    border-radius: 4px 4px 0 0;
    padding: 4px 10px;
    font-size: 11px;
    cursor: pointer;
    white-space: nowrap;
    font-family: var(--font);
}
.preview-sheet-tab:hover { color: var(--color-text-primary); }
.preview-sheet-tab.active {
    background: var(--color-bg);
    color: var(--color-text-primary);
    border-color: var(--color-border);
    border-bottom: 1px solid var(--color-bg);
    margin-bottom: -1px;
    font-weight: 600;
}

.preview-sheet-scroll {
    flex: 1;
    overflow: auto;
    background: var(--color-bg);
}
.preview-sheet-wrap { display: inline-block; min-width: 100%; }

.preview-sheet-grid {
    border-collapse: separate;
    border-spacing: 0;
    font: 11px/1.4 -apple-system, BlinkMacSystemFont, "Helvetica Neue", sans-serif;
    table-layout: auto;
}

/* Cell + header borders. ``border-collapse: separate`` + edge-only
   borders gives the clean Excel grid look without the double-line
   artifacts of ``collapse``. */
.preview-sheet-grid th,
.preview-sheet-grid td {
    border-right: 1px solid var(--color-border-light);
    border-bottom: 1px solid var(--color-border-light);
    padding: 2px 6px;
    min-width: 60px;
    max-width: 240px;
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
    color: var(--color-text-primary);
    background: var(--color-bg-elevated);
}

/* Column-letter header — sticky to the top of the scroller. */
.preview-sheet-col-head {
    position: sticky;
    top: 0;
    z-index: 2;
    background: var(--color-bg-hover);
    color: var(--color-text-secondary);
    font-weight: 500;
    text-align: center;
    border-top: 1px solid var(--color-border-light);
}

/* Row-number header — sticky to the left of the scroller. */
.preview-sheet-row-head {
    position: sticky;
    left: 0;
    z-index: 1;
    background: var(--color-bg-hover);
    color: var(--color-text-secondary);
    font-weight: 500;
    text-align: right;
    border-left: 1px solid var(--color-border-light);
    min-width: 32px;
}

/* Top-left corner — sticky in both axes, sits above both headers. */
.preview-sheet-corner {
    position: sticky;
    top: 0;
    left: 0;
    z-index: 3;
    background: var(--color-bg-hover);
    border-top: 1px solid var(--color-border-light);
    border-left: 1px solid var(--color-border-light);
    min-width: 32px;
}

/* Numbers right-aligned, monospace-ish digits for column alignment. */
.preview-sheet-grid td.num {
    text-align: right;
    font-variant-numeric: tabular-nums;
}
.preview-sheet-grid td.date {
    color: var(--color-text-primary);
    font-variant-numeric: tabular-nums;
}

.preview-sheet-trunc {
    padding: 8px 12px;
    font-size: 11px;
    color: var(--color-text-secondary);
}

/* Markdown plugin — rendered prose inside the preview panel */
.preview-markdown {
    padding: var(--md);
    font-size: 13px;
    line-height: 1.6;
    color: var(--color-text-primary);
    overflow-wrap: anywhere;
}
.preview-markdown h1,
.preview-markdown h2,
.preview-markdown h3,
.preview-markdown h4 {
    margin: 1em 0 0.4em;
    font-weight: 600;
    line-height: 1.25;
}
.preview-markdown h1 { font-size: 18px; border-bottom: 1px solid var(--color-border-light); padding-bottom: 4px; }
.preview-markdown h2 { font-size: 15px; border-bottom: 1px solid var(--color-border-light); padding-bottom: 3px; }
.preview-markdown h3 { font-size: 13px; }
.preview-markdown h4 { font-size: 12px; color: var(--color-text-secondary); }
.preview-markdown p { margin: 0.5em 0; }
.preview-markdown ul,
.preview-markdown ol { margin: 0.4em 0; padding-left: 20px; }
.preview-markdown li { margin: 2px 0; }
.preview-markdown code {
    font: 11px/1.4 ui-monospace, "SF Mono", Menlo, monospace;
    background: var(--color-bg-hover);
    border-radius: 3px;
    padding: 1px 4px;
}
.preview-markdown pre {
    background: var(--color-bg);
    border: 1px solid var(--color-border-light);
    border-radius: var(--radius-sm);
    padding: 10px 12px;
    overflow-x: auto;
    margin: 0.5em 0;
}
.preview-markdown pre code {
    background: none;
    padding: 0;
    font-size: 11px;
}
.preview-markdown blockquote {
    border-left: 3px solid var(--color-border);
    margin: 0.5em 0;
    padding: 2px 0 2px 12px;
    color: var(--color-text-secondary);
}
.preview-markdown a { color: var(--color-accent); text-decoration: none; }
.preview-markdown a:hover { text-decoration: underline; }
.preview-markdown table {
    border-collapse: collapse;
    width: 100%;
    font-size: 12px;
    margin: 0.5em 0;
}
.preview-markdown th,
.preview-markdown td {
    border: 1px solid var(--color-border-light);
    padding: 4px 8px;
    text-align: left;
}
.preview-markdown th { background: var(--color-bg-hover); font-weight: 600; }
.preview-markdown img { max-width: 100%; height: auto; border-radius: var(--radius-sm); }
.preview-markdown hr { border: none; border-top: 1px solid var(--color-border-light); margin: 1em 0; }