tb-formula {
  display: block;
  margin: 1rem 0;
}

.tb-formula__prompt {
  margin-bottom: 1rem;
}

.tb-formula__variable {
  font-weight: 700;
}

.tb-formula__answer {
  margin-top: 0.75rem;
}

.tb-formula__label {
  align-items: center;
  display: inline-flex;
  gap: 0.5rem;
}

.tb-formula__input {
  box-sizing: border-box;
  color: inherit;
  font: inherit;
  min-height: 2rem;
  min-width: 8rem;
  padding: 0.25rem 0.4rem;
}

.tb-formula__input:focus-visible,
.tb-formula__check:focus-visible,
.tb-formula__new-values:focus-visible {
  outline: 2px solid var(--color-brand-primary, #1f6feb);
  outline-offset: 2px;
}

.tb-formula__input--correct {
  border-color: #2e7d32;
}

.tb-formula__input--incorrect {
  border-color: #b00020;
}

.tb-formula__actions {
  align-items: center;
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem;
  margin-top: 1rem;
}

.tb-formula__check,
.tb-formula__new-values {
  cursor: pointer;
  min-height: 2.25rem;
  padding: 0.35rem 0.75rem;
}

.tb-formula__status {
  font-weight: 700;
  margin: 0;
}