.workbook-ad {
  min-height: 420px;
  background: var(--navy);
  color: #fff;
  padding: 3rem;
  box-shadow: var(--shadow);
  display: grid;
  place-content: center;
  gap: .5rem;
  text-align: center;
}

.workbook-ad p,
.workbook-ad strong {
  position: static;
  display: block;
  margin: 0;
  line-height: 1;
}

.workbook-ad p {
  font-family: "League Spartan", sans-serif;
  font-size: clamp(2.25rem, 5vw, 4.5rem);
  font-weight: 800;
  letter-spacing: .04em;
}

.workbook-ad strong {
  color: var(--gold);
  font-family: "League Spartan", sans-serif;
  font-size: clamp(2rem, 4.5vw, 4rem);
  letter-spacing: .02em;
}

.workbook-ad::before,
.workbook-ad::after { content: none; }

@media (max-width: 850px) {
  .workbook-ad { width: min(100%, 560px); justify-self: center; }
}

@media (max-width: 540px) {
  .workbook-ad { min-height: 300px; padding: 2rem 1.25rem; }
}