.tb-calc {
  border: 1px solid #e2e6ea;
  border-radius: 12px;
  padding: 1.25rem 1.5rem;
  margin: 1.5rem 0;
  background: #f8fafc;
}
.tb-calc__title { margin: 0 0 1rem; font-size: 1.15rem; }
.tb-calc__inputs {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
  gap: 1rem;
}
.tb-calc__field label {
  display: block;
  font-size: 0.9rem;
  font-weight: 600;
  margin-bottom: 0.35rem;
}
.tb-calc__input {
  width: 100%;
  padding: 0.55rem 0.7rem;
  border: 1px solid #cbd5e1;
  border-radius: 8px;
  font-size: 1rem;
  box-sizing: border-box;
}
.tb-calc__result {
  margin-top: 1.25rem;
  padding-top: 1rem;
  border-top: 1px dashed #cbd5e1;
  display: flex;
  flex-direction: column;
  align-items: flex-start;
}
.tb-calc__amount {
  font-size: 2rem;
  font-weight: 800;
  color: #2563EB;
  line-height: 1;
}
.tb-calc__label { font-size: 0.85rem; color: #64748b; margin-top: 0.25rem; }
.tb-calc__nota {
  margin-top: 0.6rem;
  font-size: 0.8rem;
  color: #92400e;
  background: #fef3c7;
  padding: 0.35rem 0.6rem;
  border-radius: 6px;
}