.text-boxes__boxes {
  display: grid;
  gap: var(--s2);
}
.text-box {
  background-color: rgba(255,255,255,0.5);
  padding: var(--s1);
}
.text-box__heading {
  font-size: 2.5rem;
  line-height: calc(1em + 0.5rem);
  font-weight: normal;
}

/* sm */
@media (min-width: 576px) {
  .text-box__heading {
    font-size: 3rem;
  }
}

/* md */
@media (min-width: 768px) {
  .text-box__heading {
    font-size: 3.5rem;
  }
}

/* lg */
@media (min-width: 992px) {
  .text-boxes__boxes {
    grid-template-columns: 1fr 1fr 1fr;
    gap: var(--s3);
  }
  .text-box__heading {
    font-size: 4rem;
  }
}

/* xl */
@media (min-width: 1200px) {
  .text-box__heading {
    font-size: 4.5rem;
  }
}

/* xxl */
@media (min-width: 1400px) {
}