:root{
  --ink:#191922; --muted:#6b6b78; --line:#e5e3ee; --brand:#6c4bf4; --brand-dark:#5738d6;
  --bg:#fafaff; --card:#fff; --ok:#1d9e75; --err:#d64545;
}
*{box-sizing:border-box}
body{margin:0;font:16px/1.5 system-ui,-apple-system,"Segoe UI",Roboto,sans-serif;color:var(--ink);background:var(--bg)}
.top{max-width:1080px;margin:0 auto;padding:28px 20px 4px}
.brand{font-size:26px;font-weight:700;letter-spacing:-.02em}
.brand .logo{color:var(--brand)}
.tag{color:var(--muted);margin-top:2px}
main{max-width:1080px;margin:0 auto;padding:16px 20px 40px}

.dropzone{border:2px dashed #cfc9ea;border-radius:16px;background:var(--card);padding:44px 20px;text-align:center;transition:border-color .15s,background .15s}
.dropzone.drag{border-color:var(--brand);background:#f3f0ff}
.dz-title{font-size:22px;font-weight:650}
.dz-sub{color:var(--muted);margin:4px 0 16px}
.model-status{margin-top:14px;font-size:13px;color:var(--muted)}
.model-status .bar{height:6px;background:var(--line);border-radius:3px;overflow:hidden;max-width:420px;margin:8px auto 0}
.model-status .bar i{display:block;height:100%;width:0;background:var(--brand);transition:width .2s}

.btn{appearance:none;border:1px solid var(--line);background:var(--card);color:var(--ink);padding:9px 16px;border-radius:10px;font-size:15px;cursor:pointer}
.btn:hover{border-color:#c9c4e4}
.btn.primary{background:var(--brand);border-color:var(--brand);color:#fff;font-weight:600}
.btn.primary:hover{background:var(--brand-dark)}
.btn:disabled{opacity:.45;cursor:default}
.btn.small{padding:6px 10px;font-size:13px;border-radius:8px}

.controls{display:flex;flex-wrap:wrap;gap:12px;align-items:center;margin:20px 0 4px}
.controls label{font-size:14px;color:var(--muted);display:flex;gap:8px;align-items:center}
.controls select{font-size:14px;padding:7px 8px;border:1px solid var(--line);border-radius:8px;background:var(--card);color:var(--ink)}
.batch-status{font-size:14px;color:var(--muted);margin-right:auto}

.grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(230px,1fr));gap:16px;margin-top:16px}
.card{background:var(--card);border:1px solid var(--line);border-radius:14px;overflow:hidden;display:flex;flex-direction:column}
.preview{position:relative;aspect-ratio:4/3;display:flex;align-items:center;justify-content:center;overflow:hidden;
  background:repeating-conic-gradient(#e8e8ef 0 25%, #fff 0 50%) 0 0/22px 22px}
.preview img{max-width:100%;max-height:100%;object-fit:contain;display:block}
.preview .orig{position:absolute;inset:0;width:100%;height:100%;object-fit:contain;background:#f4f4f8}
.card .meta{padding:10px 12px 12px;display:flex;flex-direction:column;gap:8px}
.card .name{font-size:13px;font-weight:600;white-space:nowrap;overflow:hidden;text-overflow:ellipsis}
.card .status{font-size:13px;color:var(--muted)}
.card .status.err{color:var(--err)}
.card .row{display:flex;gap:8px;flex-wrap:wrap}
.spin{width:26px;height:26px;border-radius:50%;border:3px solid var(--line);border-top-color:var(--brand);animation:sp 0.8s linear infinite}
@keyframes sp{to{transform:rotate(360deg)}}

.how{margin-top:40px;background:var(--card);border:1px solid var(--line);border-radius:14px;padding:20px 24px}
.how h2{margin:0 0 8px;font-size:18px}
.how ol{margin:0;padding-left:20px}
.how .fine{color:var(--muted);font-size:14px;margin-bottom:0}
.foot{max-width:1080px;margin:0 auto;padding:0 20px 30px;color:var(--muted);font-size:13px}