main .matrix-calculator {
  background: #1c1c1c;
  color: #fff;
  max-width: 800px;
  margin: auto;
  padding: 2rem;
  border-radius: 10px;
}

main .matrix-inputs {
  display: flex;
  justify-content: space-between;
  gap: 1rem;
  flex-wrap: wrap;
}

main .matrix-grid {
  display: grid;
  grid-template-columns: repeat(3, 50px);
  gap: 0.5rem;
  margin-top: 0.5rem;
}

main .matrix-grid input {
  width: 50px;
  padding: 0.3rem;
  text-align: center;
  border: 1px solid #888;
  border-radius: 5px;
  background: #2b2b2b;
  color: #fff;
}

main .controls {
  margin: 2rem 0;
  display: flex;
  flex-wrap: wrap;
  gap: 1rem;
  align-items: center;
}

main .controls label,
main .controls select,
main .controls button {
  font-size: 1rem;
}

main .controls select,
main .controls button {
  padding: 0.5rem 1rem;
  border-radius: 5px;
  background: #333;
  color: #fff;
  border: none;
}

main #matrix-result {
  margin-top: 1rem;
}