#black-screen-guide {
  box-sizing: border-box;
  width: min(100% - 2rem, 880px) !important;
  max-width: 880px !important;
  margin: 3.5rem auto 0;
  padding: 0;
  line-height: 1.75;
}

#black-screen-guide > h2 {
  max-width: 22ch;
  margin: 0 auto 1.25rem;
  font-size: clamp(1.7rem, 3vw, 2.25rem);
  line-height: 1.25;
}

#black-screen-guide > p {
  max-width: 70ch;
  margin: 0 auto 2.75rem;
  color: #d2d2d9;
  font-size: 1.08rem;
  line-height: 1.75;
}

#black-screen-guide > .mb-6 {
  margin-bottom: 2rem;
  padding-bottom: 1.8rem;
  border-bottom: 1px solid #34343e;
}

#black-screen-guide > .mb-6 h3 {
  margin: 0 0 0.65rem;
  font-size: clamp(1.15rem, 2vw, 1.4rem);
  line-height: 1.35;
}

#black-screen-guide > .mb-6 p {
  max-width: 75ch;
  margin: 0;
  color: #d2d2d9;
  font-size: 1rem;
  line-height: 1.75;
}

#black-screen-guide > h3 {
  margin: 2.75rem 0 1.2rem;
  font-size: 1.55rem;
}

#black-screen-guide h4 {
  line-height: 1.45;
}

#black-screen-guide h4 + button,
#black-screen-guide h4 + span {
  flex: none;
}

#black-screen-guide > div:last-child > .mb-4 {
  margin-bottom: 0.85rem;
  padding: 1rem 1.1rem;
  border: 1px solid #34343e;
  border-radius: 12px;
  background: #1d1d22;
}

#black-screen-guide > div:last-child p {
  color: #d2d2d9;
  line-height: 1.7;
}

@media (max-width: 620px) {
  #black-screen-guide {
    width: min(100% - 1.5rem, 880px) !important;
    margin-top: 2.5rem;
  }

  #black-screen-guide > p {
    font-size: 1rem;
  }
}