.polynomials-area-model__grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  grid-template-rows: 1fr 1fr;
  gap: 4px;
  max-width: 320px;
  margin: 0 auto;
  aspect-ratio: 1;
}

.polynomials-area-model__cell {
  display: flex;
  align-items: center;
  justify-content: center;
  min-height: 72px;
  border-radius: 6px;
  font-family: var(--mono);
  font-size: 0.85rem;
  font-weight: 600;
}

.polynomials-area-model__cell--ac {
  background: rgba(37, 99, 235, 0.15);
}

.polynomials-area-model__cell--ad {
  background: rgba(74, 107, 74, 0.2);
}

.polynomials-area-model__cell--bc {
  background: rgba(154, 107, 46, 0.2);
}

.polynomials-area-model__cell--bd {
  background: rgba(220, 38, 38, 0.12);
}

.polynomials-factor-checker__feedback {
  margin-top: 12px;
  padding: 12px 14px;
  border-radius: 8px;
  border: 1px solid var(--line);
  font-size: 0.9rem;
}

.polynomials-factor-checker__feedback--correct {
  border-color: #16a34a;
  background: rgba(22, 163, 74, 0.08);
}

.polynomials-factor-checker__feedback--incorrect {
  border-color: #dc2626;
  background: rgba(220, 38, 38, 0.06);
}

.polynomials-factor-checker__steps {
  margin: 8px 0 0;
  padding-left: 1.2rem;
  color: var(--soft-ink);
}

.polynomials-factor-checker__input {
  width: 100%;
  max-width: 420px;
  padding: 8px 12px;
  font-family: var(--mono);
  font-size: 0.9rem;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: var(--card-bg);
  color: var(--ink);
}