.calculation-table-group { margin: 1rem 0; }
.calculation-scroll-hint { display: none; margin: 0 0 .35rem; color: var(--muted, #475569); font-size: .9rem; }
.calculation-table-scroll {
  max-width: 100%;
  margin: 0;
  overflow-x: auto;
  border: 1px solid var(--border, #cbd5e1);
  border-radius: .65rem;
  background: var(--surface, #fff);
}
.calculation-table-scroll:focus-visible {
  outline: 3px solid var(--focus, #1d4ed8);
  outline-offset: 2px;
}
.calculation-table {
  width: 100%;
  min-width: 38rem;
  border-collapse: collapse;
  color: var(--text, #172033);
  font-variant-numeric: tabular-nums;
}
.calculation-table caption {
  padding: .85rem 1rem;
  text-align: left;
  font-weight: 700;
}
.calculation-table th,
.calculation-table td {
  min-width: 8rem;
  padding: .75rem;
  border-top: 1px solid var(--border, #cbd5e1);
  border-right: 1px solid var(--border, #cbd5e1);
  text-align: right;
  vertical-align: middle;
}
.calculation-table th:last-child,
.calculation-table td:last-child { border-right: 0; }
.calculation-table thead th {
  background: color-mix(in srgb, var(--accent, #2563eb) 10%, var(--surface, #fff));
  text-align: center;
}
.calculation-table tbody th {
  min-width: 13rem;
  text-align: left;
  background: color-mix(in srgb, var(--accent, #2563eb) 5%, var(--surface, #fff));
}
.calculation-answer-cell { background: color-mix(in srgb, var(--accent, #2563eb) 4%, var(--surface, #fff)); }
.calculation-input-wrap {
  display: inline-flex;
  align-items: center;
  justify-content: flex-end;
  gap: .35rem;
  width: 100%;
}
.calculation-input {
  min-width: 7rem;
  min-height: 44px;
  padding: .55rem .65rem;
  border: 2px solid var(--border, #94a3b8);
  border-radius: .45rem;
  background: var(--surface, #fff);
  color: var(--text, #172033);
  font: inherit;
  text-align: right;
}
select.calculation-input { min-width: 9.5rem; text-align: left; }
.calculation-input:focus-visible {
  outline: 3px solid var(--focus, #1d4ed8);
  outline-offset: 2px;
}
.calculation-input[aria-invalid="true"],
.calculation-input[data-result="wrong"] { border-color: var(--danger, #b42318); }
.calculation-input[data-result="correct"] { border-color: var(--success, #137333); }
.calculation-unit { white-space: nowrap; color: var(--muted, #475569); }
@media (max-width: 640px) {
  .calculation-scroll-hint { display: block; }
  .calculation-table { min-width: 44rem; }
  .calculation-table th,
  .calculation-table td { padding: .6rem; }
}