:root{
  --bg:#f7f7fb; --card:#ffffff; --ink:#1c1c28; --muted:#6b6b7d;
  --accent:#5b21b6; --accent2:#7c3aed; --gold:#b45309;
  --line:#e5e5ef; --ok:#15803d; --warn:#b45309; --err:#b91c1c;
}
*{box-sizing:border-box}
body{margin:0;background:var(--bg);color:var(--ink);font:16px/1.5 system-ui,-apple-system,"Segoe UI",Roboto,sans-serif}
.wrap{max-width:960px;margin:0 auto;padding:0 16px}
.topbar{background:#fff;border-bottom:3px solid var(--gold);padding:18px 0;margin-bottom:18px}
.topbar h1{margin:0;font-size:1.5rem}
.proto{font-size:.7rem;background:var(--accent);color:#fff;border-radius:4px;padding:2px 8px;vertical-align:middle}
.sub{color:var(--muted);margin:4px 0 0}
.panel{background:var(--card);border:1px solid var(--line);border-radius:10px;padding:18px;margin-bottom:16px}
.panel h2{margin:0 0 12px;font-size:1.15rem}
.muted{color:var(--muted);font-weight:normal;font-size:.9rem}
.dropzone{border:2px dashed var(--accent2);border-radius:10px;background:#fff;text-align:center;padding:34px 16px;margin-bottom:16px;cursor:pointer}
.dropzone.over{background:#f3efff;border-color:var(--accent)}
.dz-big{font-size:1.1rem;margin:0 0 6px}
.dz-small{color:var(--muted);margin:0;font-size:.9rem}
.linkbtn{background:none;border:none;color:var(--accent2);text-decoration:underline;cursor:pointer;font-size:1.1rem;padding:0}
.modes{display:flex;gap:18px;flex-wrap:wrap;margin-bottom:12px}
.modes label{display:flex;gap:6px;align-items:center;cursor:pointer}
.modebody{margin:8px 0}
.hidden{display:none!important}
.sliderow{display:flex;align-items:center;gap:10px;flex-wrap:wrap}
.sliderow input[type=range]{flex:1;min-width:140px}
.hint{color:var(--muted);font-size:.9rem;margin:6px 0 0}
.grid2{display:grid;grid-template-columns:1fr 1fr;gap:12px}
.grid2 label{display:flex;flex-direction:column;gap:4px;font-size:.95rem}
.grid2 input,.grid2 select{padding:8px;border:1px solid var(--line);border-radius:6px;font-size:1rem;max-width:100%}
.check{flex-direction:row!important;align-items:center;gap:8px!important}
.presets{display:flex;gap:8px;flex-wrap:wrap;align-items:center;margin-top:12px}
.presets span{color:var(--muted);font-size:.9rem}
button{padding:9px 14px;border:1px solid var(--line);border-radius:8px;background:#fff;cursor:pointer;font-size:.95rem}
button:hover{border-color:var(--accent2)}
button:disabled{opacity:.45;cursor:default}
button.primary{background:var(--accent);border-color:var(--accent);color:#fff}
.row{display:flex;gap:8px;flex-wrap:wrap;margin-bottom:12px}
.filelist{display:flex;flex-direction:column;gap:12px}
.fcard{border:1px solid var(--line);border-radius:8px;padding:12px}
.fcard .fname{font-weight:600;overflow-wrap:anywhere}
.fcard .fmeta{color:var(--muted);font-size:.88rem;margin:4px 0 8px}
.fcard .frow{display:flex;gap:8px;flex-wrap:wrap;align-items:center}
.status{font-size:.88rem}
.status.ok{color:var(--ok)} .status.err{color:var(--err)} .status.work{color:var(--warn)}
.compare{display:grid;grid-template-columns:1fr 1fr;gap:10px;margin-top:10px}
.compare figure{margin:0;border:1px solid var(--line);border-radius:6px;overflow:hidden;background:#fafafa}
.compare img{width:100%;height:auto;display:block;image-rendering:auto}
.compare figcaption{font-size:.8rem;color:var(--muted);padding:4px 8px}
.stats{width:100%;border-collapse:collapse;margin-top:10px;font-size:.9rem}
.stats td,.stats th{border:1px solid var(--line);padding:5px 8px;text-align:left}
.stats th{background:#fafafe}
.limits ul{margin:0;padding-left:20px}
.limits li{margin-bottom:6px}
footer{padding:18px 0 30px;font-size:.85rem}
code{background:#f0f0f6;padding:1px 5px;border-radius:4px;font-size:.9em}
@media (max-width:520px){
  .grid2{grid-template-columns:1fr}
  .compare{grid-template-columns:1fr}
  .topbar h1{font-size:1.25rem}
}