/* GST product upgrades — additive styles only; existing site design remains authoritative. */
.gst-upgrade-grid{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:.7rem}
.gst-explain-grid{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:.8rem}
.gst-explain-grid .calc-card{padding:1rem}
.gst-explain-grid h3{font-size:1rem;margin:0 0 .55rem;color:var(--txt,#0f172a)}
.gst-explain-grid p{margin:.35rem 0;line-height:1.55}
.gst-check-list{margin:.4rem 0 1rem;padding-left:1.25rem;display:grid;gap:.5rem;line-height:1.55}
.gst-privacy-note{padding:.8rem 1rem;border:1px solid var(--border,#d1d5db);border-left:4px solid #0C7D61;border-radius:8px;background:var(--g50,#f0fdf4);line-height:1.55}
.gst-save-status{margin:.65rem 0 0;font-size:.8rem;color:var(--txt2,#64748b)}
.bulk-hdr-pro{grid-template-columns:1.4fr 1fr 1fr 1fr}
.bulk-row-pro{display:grid;grid-template-columns:1.4fr 1fr 1fr 1fr;gap:.55rem;align-items:start;padding:.7rem 0;border-bottom:1px solid var(--border,#e5e7eb)}
.bulk-cell{display:grid;gap:.4rem;min-width:0}
.bulk-cell-pair{display:grid;grid-template-columns:1fr 1fr;gap:.4rem}
.bulk-cell label{font-size:.7rem;font-weight:700;color:var(--txt2,#64748b)}
.bulk-cell input,.bulk-cell select{width:100%;min-width:0}
.bulk-actions{display:grid;grid-template-columns:1fr auto auto;gap:.35rem;align-items:end}
.bulk-actions .btn{min-width:42px;padding:.62rem .55rem}
.bulk-rate-summary{margin-top:.65rem;padding-top:.65rem;border-top:1px solid var(--border,#d1d5db)}
.bulk-rate-summary h3{font-size:.9rem;margin:0 0 .4rem}
.bulk-rate-row{display:flex;justify-content:space-between;gap:1rem;padding:.2rem 0;font-size:.82rem}
.bulk-invalid{border-color:#dc2626!important;box-shadow:0 0 0 2px rgba(220,38,38,.12)!important}
@media(max-width:900px){
  .gst-explain-grid{grid-template-columns:1fr}
  .bulk-hdr-pro{display:none!important}
  .bulk-row-pro{grid-template-columns:1fr 1fr;border:1px solid var(--border,#e5e7eb);border-radius:10px;padding:.75rem;margin:.65rem 0;background:var(--card,#fff)}
}
@media(max-width:640px){
  .gst-upgrade-grid,.bulk-row-pro{grid-template-columns:1fr}
  .bulk-actions{grid-template-columns:1fr auto auto}
}
@media print{
  .gst-explain,.gst-privacy-note,.gst-save-status{break-inside:avoid}
}