.pdf-series-heading {
  display: flex;
  justify-content: space-between;
  align-items: end;
  gap: 2rem;
  margin-bottom: 1.5rem;
}
.pdf-series-heading p {
  margin: 0;
  color: var(--red);
  font-size: .7rem;
  font-weight: 800;
  letter-spacing: .12em;
  text-transform: uppercase;
}
.pdf-series-heading h2 {
  margin: .4rem 0 0 !important;
}
.pdf-open {
  padding: .8rem 1rem;
  border: 1px solid var(--ink);
  font-size: .75rem;
  font-weight: 800;
  text-decoration: none !important;
  white-space: nowrap;
}
.pdf-frame {
  display: block;
  width: 100%;
  height: min(78vh, 68rem);
  min-height: 42rem;
  border: 1px solid var(--line);
  background: #e5e7eb;
}
.pdf-fallback {
  padding: .75rem 1rem;
  background: var(--cream);
  font-size: .85rem;
}
.pdf-parts {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: .5rem;
  margin-top: 2rem;
}
.pdf-parts a {
  padding: 1rem;
  border: 1px solid var(--ink);
  text-align: center;
  font-weight: 800;
  text-decoration: none !important;
}
.pdf-parts a:hover, .pdf-parts .is-current {
  background: var(--ink);
  color: #fff;
}
.pdf-next {
  display: flex;
  justify-content: space-between;
  gap: 1rem;
  margin-top: 1rem;
}
.pdf-next a {
  font-weight: 800;
}
.tip-card {
  scroll-margin: 24vh;
}
@media (max-width: 680px) {
  .pdf-series-heading {
    align-items: stretch;
    flex-direction: column;
  }
  .pdf-open {
    text-align: center;
  }
  .pdf-frame {
    min-height: 34rem;
  }
  .pdf-parts {
    grid-template-columns: repeat(2, 1fr);
  }
}