/* Before/after previews for /grayscale-pdf-converter (scoped). */
#gpcApp .gpc-compare { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 12px; margin: 12px 0; }
#gpcApp .gpc-compare figure { margin: 0; text-align: center; }
#gpcApp .gpc-compare canvas { max-width: 100%; height: auto; border: 1px solid var(--bm-line); box-shadow: 0 1px 3px rgba(0, 0, 0, .12); background: #fff; }
#gpcApp .gpc-compare figcaption { font-size: .8rem; margin-top: 4px; }
#gpcApp .gpc-progress { width: 100%; }