.brand-guidelines {
  max-width: 68ch;
  font-size: 1.0625rem;
  line-height: 1.8;
  overflow-wrap: break-word;
}

.brand-guidelines h1 {
  margin: 0 0 .75rem;
  font-size: clamp(2.6rem, 6vw, 4rem);
  line-height: 1.1;
}

.brand-guidelines h2 {
  margin: 0 0 1.5rem;
  color: var(--accent);
  font-size: clamp(1.7rem, 4vw, 2.3rem);
}

.brand-guidelines h3 {
  margin: 3rem 0 1.25rem;
  padding-top: 1.5rem;
  border-top: 1px solid var(--border-color);
  font-family: Georgia, "Times New Roman", serif;
  font-size: clamp(1.45rem, 3vw, 1.8rem);
  font-weight: 500;
  line-height: 1.3;
}

.brand-guidelines h4 {
  display: flex;
  align-items: baseline;
  gap: .85rem;
  margin: 2.75rem 0 1.25rem;
  color: var(--accent);
  font-size: clamp(1.25rem, 3vw, 1.45rem);
  line-height: 1.4;
}

.brand-guidelines .guideline-number {
  flex-shrink: 0;
  font-family: ui-monospace, SFMono-Regular, Consolas, monospace;
  font-size: .85rem;
  font-weight: 500;
  letter-spacing: .06em;
}

.brand-guidelines p { margin: 0 0 1.4rem; }
.brand-guidelines > h2 + p { color: var(--text-muted); font-size: .9rem; }
.brand-guidelines > h2 + p + p { color: var(--accent); font-size: 1.2rem; }
.brand-guidelines ul { margin: 0 0 1.5rem; padding-left: 1.5rem; }
.brand-guidelines li { margin-bottom: 1rem; padding-left: .25rem; }
.brand-guidelines li::marker { color: var(--accent); }

.guidelines-quick-reference {
  margin: 2rem 0 3rem;
  padding: 1.5rem clamp(1rem, 3vw, 1.75rem);
  border-left: 3px solid var(--accent);
  background: var(--blockquote-bg);
}

.guidelines-quick-reference h3 {
  margin: 0 0 1.25rem;
  padding: 0;
  border: 0;
}

.guidelines-quick-reference > p:last-child,
.guidelines-voice-group > p:last-child { margin-bottom: 0; }

.guidelines-voice-group + .guidelines-voice-group {
  margin-top: 2rem;
  padding-top: 1.5rem;
  border-top: 1px solid var(--border-color);
}

@media (max-width: 600px) {
  .brand-guidelines { font-size: 1rem; }
}