/* PDF 轉圖片 */
.pi-previews { display: grid; grid-template-columns: repeat(auto-fill, minmax(110px, 1fr)); gap: 8px; margin: 10px 0; }
.pi-previews figure { margin: 0; text-align: center; font-size: .85rem; color: var(--muted); }
.pi-previews img { max-width: 100%; border: 1px solid var(--line); background: #fff; }