/* GST Calculator - scoped additions on top of the shared marketing design
   system (tokens.css / components.css already loaded via renderHead()).
   Reuses .card / .form-grid / .field / .input / .btn / .kv-list as-is. */

/* No !important: several elements toggle visibility via direct inline
   style.display in the migrated app.js, which must be able to override
   this default. classList-toggled elements (no competing inline style)
   still hide correctly with a plain rule. */
.hidden { display: none; }

.tool-grid { display: grid; grid-template-columns: 1fr 1fr; gap: var(--sp-6); align-items: start; }
@media (max-width: 760px) {
  .tool-grid { grid-template-columns: 1fr; }
}

.option-grid { display: grid; grid-template-columns: repeat(2, 1fr); gap: var(--sp-3); }
.option-box {
  display: flex; align-items: center; gap: var(--sp-2);
  padding: var(--sp-3); border: 1px solid var(--border); border-radius: var(--r-md);
  font-size: var(--fs-14); font-weight: 620; color: var(--ink-700);
  cursor: pointer; transition: border-color var(--dur-base) var(--ease), background var(--dur-base) var(--ease);
}
.option-box:has(input:checked) { border-color: var(--brand-500); background: var(--brand-50); color: var(--brand-700); }
.option-box input { accent-color: var(--brand-600); }

.kv-row.final {
  margin-top: var(--sp-3); padding: var(--sp-4) var(--sp-5); border-radius: var(--r-md);
  background: var(--brand-700); border-bottom: none;
}
.kv-row.final .k, .kv-row.final .v { color: #fff; font-size: var(--fs-16); font-weight: 700; }

@media (max-width: 640px) {
  .option-grid { grid-template-columns: 1fr; }
}