.handbook {
  display: grid;
  grid-template-columns: 260px minmax(0, 1fr);
  gap: clamp(2rem, 4vw, 3.75rem);
  align-items: start;
  padding-bottom: var(--space-section);
}

.handbook-content {
  padding: 0.25rem 0 0;
}

.handbook-nav {
  position: sticky;
  top: calc(var(--header-h) + 1.25rem);
  padding: 1.25rem 1rem;
  border: 1px solid var(--line);
  background:
    linear-gradient(180deg, rgba(147, 165, 255, 0.05), transparent 40%, rgba(125, 1, 1, 0.06)),
    var(--surface);
}

.handbook-nav__label {
  margin: 0 0 0.85rem;
  font-size: 0.7rem;
  font-weight: 700;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--muted);
}

.handbook-nav ol {
  margin: 0;
  padding: 0;
  list-style: none;
  display: grid;
  gap: 0.2rem;
}

.handbook-nav a {
  display: block;
  padding: 0.5rem 0.6rem;
  color: var(--muted);
  text-decoration: none;
  font-size: 0.9rem;
  font-weight: 600;
  border-left: 2px solid transparent;
}

.handbook-nav a:hover,
.handbook-nav a.is-active {
  color: var(--text);
  border-left-color: var(--blend);
  background: linear-gradient(90deg, rgba(147, 165, 255, 0.1), rgba(194, 58, 58, 0.08));
}

.handbook-chapter {
  padding: clamp(2rem, 4vw, 3rem) 0;
  border-bottom: 1px solid var(--line);
  scroll-margin-top: calc(var(--header-h) + 1.25rem);
}

.handbook-chapter:first-child {
  padding-top: 0;
}

.handbook-chapter:last-child {
  border-bottom: 0;
}

.handbook-chapter__num {
  display: block;
  margin-bottom: 0.65rem;
  font-size: 0.74rem;
  font-weight: 700;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--valorium);
}

.handbook-chapter h2 {
  margin: 0 0 1rem;
  font-family: var(--font-display);
  font-size: clamp(1.8rem, 3vw, 2.5rem);
  color: var(--text);
}

.handbook-chapter > p {
  margin: 0 0 1rem;
  color: var(--muted);
  max-width: 48rem;
}

.criteria {
  margin-top: 1.5rem;
  border-top: 1px solid var(--line);
}

.criteria__row {
  display: grid;
  grid-template-columns: 14rem 1fr;
  gap: 1.25rem;
  padding: 1rem 0;
  border-bottom: 1px solid var(--line);
}

.criteria__row dt {
  margin: 0;
  font-weight: 700;
  color: var(--dust);
}

.criteria__row dd {
  margin: 0;
  color: var(--muted);
}

.process {
  margin-top: 1.75rem;
  display: grid;
  grid-template-columns: repeat(6, 1fr);
  gap: 0.65rem;
}

.process__step {
  padding: 1.1rem 0.9rem;
  background: var(--graphite);
  border-top: 2px solid var(--valorium);
  transition: transform 0.25s var(--ease), box-shadow 0.25s var(--ease);
}

.process__step:nth-child(even) {
  border-top-color: var(--infernal-bright);
}

.process__step:hover {
  transform: translateY(-3px);
  box-shadow: 0 10px 24px rgba(0, 0, 0, 0.25);
}

.process__step strong {
  display: block;
  margin-bottom: 0.3rem;
  font-family: var(--font-display);
  font-size: 1.15rem;
  color: var(--text);
}

.process__step span {
  font-size: 0.88rem;
  color: var(--muted);
}

.adjust-list {
  margin: 1.25rem 0 0;
  padding: 0;
  list-style: none;
  display: grid;
  gap: 0.65rem;
}

.adjust-list li {
  padding: 0.9rem 1rem;
  border-left: 2px solid var(--valorium);
  background: var(--valorium-soft);
  color: var(--dust);
}

.leader-duties {
  margin: 1.25rem 0 0;
  padding: 0;
  list-style: none;
  display: grid;
  gap: 0.55rem;
}

.leader-duties li {
  padding: 0.75rem 0;
  border-bottom: 1px solid var(--line);
  color: var(--muted);
}

.leader-duties li::before {
  content: "— ";
  color: var(--valorium);
}

.final-goal {
  padding: clamp(2rem, 4vw, 2.75rem);
  border: 1px solid rgba(147, 165, 255, 0.35);
  background: linear-gradient(120deg, var(--valorium-soft), transparent 60%), var(--surface);
}

.final-goal p {
  margin: 0;
  font-family: var(--font-display);
  font-size: clamp(1rem, 1.4vw, 1.15rem);
  line-height: 1.55;
  color: var(--text);
  max-width: 46rem;
}

@media (max-width: 1000px) {
  .handbook {
    grid-template-columns: 1fr;
  }

  .handbook-nav {
    position: static;
  }

  .handbook-nav ol {
    display: flex;
    flex-wrap: wrap;
    gap: 0.35rem;
  }

  .handbook-nav a {
    border-left: 0;
    border-bottom: 2px solid transparent;
  }

  .handbook-nav a.is-active {
    border-bottom-color: var(--valorium);
  }

  .process {
    grid-template-columns: repeat(3, 1fr);
  }
}

@media (max-width: 700px) {
  .criteria__row {
    grid-template-columns: 1fr;
    gap: 0.25rem;
  }

  .process {
    grid-template-columns: 1fr 1fr;
  }
}

@media (max-width: 420px) {
  .process {
    grid-template-columns: 1fr;
  }
}