#calculator-salt {
  padding: 1rem;
  border: solid 1px #333;
  margin: 1rem 0;
  background: #F7F7F7;
  border-radius: 1rem;
}

#calculator-salt hr {
  margin: 1rem 0;
  border-color: #8390BC;
}

.salt-amounts {
  text-align: left;
}

.calculator-grid {
  display: flex;
  flex-direction: column;
  gap: 1rem;
}

.calculator-grid > div {
  display: block;
  border: 1px solid #ddd;
  border-radius: 0.25rem;
  padding: 1rem;
  background: #FFF;
}

.calculator-grid > div > div {
  display: block;
  margin-bottom: 0.5rem;
}

@media (min-width: 768px) {

  .salt-amounts {
    text-align: center;
  }

  .calculator-grid {
    display: grid;
    border: 1px solid #DDD;
    gap: 0;
  }
  .calculator-grid > div {
    display: grid;
    grid-column: span 2;
    grid-template-columns: subgrid;

    padding: 0;
    border-radius: 0;

    transition: background-color 0.2s ease;
    cursor: pointer;
  }

  .calculator-grid > div:hover {
    background-color: #FBFBFB;
  }

  .calculator-grid > div > div {
    padding: 1rem;
    margin: 0;
    border: 1px solid #DDD;
  }
}