:root{
  --ink:#172b35;
  --muted:#5f737a;
  --paper:#f3f8f8;
  --card:#fff;
  --line:#d5e3e3;
  --accent:#176776;
  --accent2:#d6eff0;
  --shadow:0 14px 40px rgba(15,71,80,.09);
}
.masthead{background:rgba(255,255,255,.97)}
.quick-start,.tool-surface{background:#e5f1f1;border-color:#d1e5e5}
.drop-zone{border-color:#a9c8cd}
.drop-zone:hover,.drop-zone.dragging,.drop-zone:focus{background:#f6fcfc}
.file-state{background:#f0f7f7}
.tool-notice{background:#eaf6f6;color:#315962}
.result{background:#e7f6ef}
.ad-slot{border-color:#bfd5d7;color:#668186}
.batch-note{background:#183743}
.batch-note p{color:#cee0e3}
.tool-card b{margin-top:auto}