:root{--fg: #1a1a1a;--muted: #595959;--bg: #fafafa;--accent: #0b5cff;--border: #d4d4d4;--focus: #ff9800}*{box-sizing:border-box}body{margin:0;font-family:system-ui,-apple-system,Segoe UI,sans-serif;background:var(--bg);color:var(--fg);line-height:1.5}main{max-width:36rem;margin:3rem auto;padding:0 1.25rem}h1{margin:0 0 .25rem;font-size:1.75rem}h2{font-size:1.05rem;margin:0 0 .5rem}.lede{color:var(--muted);margin:0 0 2rem}form{display:flex;flex-direction:column;gap:1.25rem;padding:1.5rem;background:#fff;border:1px solid var(--border);border-radius:8px}.field{display:flex;flex-direction:column;gap:.35rem;font-weight:500}.field small{font-weight:400;color:var(--muted);margin-top:.15rem}#drop-zone{padding:1.25rem;border:2px dashed var(--border);border-radius:6px;transition:background .15s,border-color .15s}#drop-zone.drop-active{background:#eef4ff;border-color:var(--accent)}input[type=file],select{padding:.5rem;border:1px solid var(--border);border-radius:4px;background:#fff;font:inherit}input:focus,select:focus,button:focus,#download:focus{outline:3px solid var(--focus);outline-offset:2px}button{padding:.65rem 1rem;background:var(--accent);color:#fff;border:0;border-radius:4px;font:inherit;font-weight:500;cursor:pointer}button:disabled{opacity:.6;cursor:progress}#status{margin:1.25rem 0 0;color:var(--muted)}#progress{display:block;width:100%;margin:.75rem 0 0;height:.5rem}#download{display:inline-block;margin:1rem 0 0;padding:.55rem .9rem;background:#fff;border:1px solid var(--accent);color:var(--accent);border-radius:4px;text-decoration:none;font-weight:500}.summary{margin-top:1.5rem;padding:1.25rem 1.5rem;background:#fff;border:1px solid var(--border);border-radius:8px}.summary dl{display:grid;grid-template-columns:auto 1fr;gap:.35rem 1rem;margin:0}.summary dt{color:var(--muted);font-weight:500}.summary dd{margin:0}.summary-note{margin:1rem 0 0;color:var(--muted);font-size:.95rem}.preview{margin-top:1.5rem}.preview canvas{display:block;width:100%;max-width:100%;height:auto;border:1px solid var(--border);border-radius:8px;background:#fff}.preview-note{margin:.5rem 0 0;color:var(--muted);font-size:.9rem}.hints{margin-top:2.5rem;padding-top:1.25rem;border-top:1px solid var(--border);color:var(--muted);font-size:.95rem}.hints ul{padding-left:1.25rem;margin:0}footer{margin-top:2rem;padding-top:1rem;border-top:1px solid var(--border);font-size:.9rem;color:var(--muted)}footer a{color:var(--muted)}