/* Buttons */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
  padding: 0.95rem 1.75rem;
  font-family: inherit;
  font-size: 0.9375rem;
  font-weight: 700;
  border: none;
  border-radius: var(--radius-pill);
  cursor: pointer;
  text-decoration: none;
  transition: transform var(--transition), box-shadow var(--transition), background var(--transition);
}

.btn--primary {
  color: #fff;
  background: linear-gradient(135deg, var(--accent) 0%, #5b4ae8 50%, var(--accent-warm) 100%);
  background-size: 200% 200%;
  box-shadow: 0 4px 20px rgba(61, 79, 219, 0.35);
}

.btn--primary:hover {
  transform: translateY(-2px);
  box-shadow: 0 12px 32px rgba(61, 79, 219, 0.4);
  color: #fff;
}

.btn--outline {
  background: transparent;
  color: var(--text);
  border: 1.5px solid var(--border-strong);
}

.btn--outline:hover {
  border-color: var(--accent);
  color: var(--accent);
  background: var(--accent-soft);
}

.btn--sm {
  padding: 0.65rem 1.25rem;
  font-size: 0.875rem;
}

.btn--block {
  width: 100%;
}

/* Typography utilities */
.eyebrow {
  display: inline-block;
  font-size: 0.75rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.12em;
  color: var(--accent-warm);
  margin-bottom: 1rem;
}

.text-link {
  font-weight: 600;
  text-decoration: none;
}

/* Badges */
.badge {
  display: inline-block;
  padding: 0.3rem 0.7rem;
  font-size: 0.6875rem;
  font-weight: 800;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  border-radius: 8px;
  background: var(--accent-soft);
  color: var(--accent);
}

.badge--muted {
  background: var(--bg-muted);
  color: var(--text-muted);
}

/* Cards & bento */
.bento {
  display: grid;
  gap: 1rem;
}

.bento--2 {
  grid-template-columns: 1fr;
}

@media (min-width: 640px) {
  .bento--2 {
    grid-template-columns: repeat(2, 1fr);
  }
}

.bento-card {
  display: flex;
  flex-direction: column;
  padding: 1.5rem;
  background: var(--bg-elevated);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  text-decoration: none;
  color: inherit;
  transition: transform var(--transition), box-shadow var(--transition), border-color var(--transition);
}

.bento-card__action {
  display: inline-flex;
  align-items: center;
  align-self: flex-start;
  margin-top: auto;
  padding: 0.5rem 1rem;
  font-size: 0.85rem;
  font-weight: 700;
  color: var(--accent);
  border: 1px solid rgba(61, 79, 219, 0.35);
  border-radius: 999px;
  background: rgba(61, 79, 219, 0.06);
  transition: background var(--transition), border-color var(--transition), color var(--transition);
}

.bento-card:hover .bento-card__action {
  background: var(--accent);
  border-color: var(--accent);
  color: #fff;
}

.bento-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow);
  border-color: rgba(61, 79, 219, 0.2);
  color: inherit;
}

.bento-card__num {
  font-size: 0.75rem;
  font-weight: 800;
  color: var(--accent-warm);
}

.bento-card h3 {
  margin: 0.5rem 0 0.35rem;
  font-size: 1.1rem;
}

.bento-card p {
  margin: 0;
  font-size: 0.9rem;
  color: var(--text-muted);
  line-height: 1.5;
}

.card {
  background: var(--bg-elevated);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 1.5rem;
  box-shadow: var(--shadow-sm);
}

/* Callouts */
.callout {
  padding: 1.25rem 1.5rem;
  border-radius: var(--radius);
  margin: 1.5rem 0;
  border-left: 4px solid var(--accent);
  background: var(--bg-muted);
}

.callout--practice {
  border-left-color: #2d8c5c;
  background: #eef8f2;
}

.disclaimer-ki {
  padding: 1.35rem 1.5rem;
  border-radius: var(--radius);
  margin: 1.5rem 0 2rem;
  background: linear-gradient(135deg, #f0eeff 0%, #fdf4f2 100%);
  border: 1px solid rgba(61, 79, 219, 0.15);
  font-size: 0.9375rem;
  line-height: 1.6;
}

.disclaimer-legal {
  padding: 1.35rem 1.5rem;
  border-radius: var(--radius);
  margin: 1.5rem 0 2rem;
  background: #f8f9fc;
  border: 1px solid #d8dce8;
  font-size: 0.9rem;
  line-height: 1.55;
}

.disclaimer-legal ul {
  margin: 0.75rem 0 0;
  padding-left: 1.25rem;
}

.disclaimer-legal li {
  margin-bottom: 0.5rem;
}

/* KB TOC */
.kb-toc {
  padding: 1.25rem;
  background: var(--bg-elevated);
  border: 1px solid var(--border);
  border-radius: var(--radius);
}

.kb-toc__label {
  font-size: 0.6875rem;
  font-weight: 800;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  color: var(--text-muted);
  margin: 0 0 1rem;
}

.kb-toc ul {
  list-style: none;
  margin: 0;
  padding: 0;
}

.kb-toc li {
  margin-bottom: 0.35rem;
}

.kb-toc a {
  display: block;
  padding: 0.35rem 0;
  font-size: 0.875rem;
  text-decoration: none;
  color: var(--text-muted);
  line-height: 1.4;
  transition: color var(--transition);
}

.kb-toc a:hover {
  color: var(--accent);
}

.kb-toc .toc-l3 a {
  padding-left: 0.75rem;
  font-size: 0.8125rem;
}

.kb-toc .toc-l4 a {
  padding-left: 1.25rem;
  font-size: 0.75rem;
  opacity: 0.85;
}

.kb-toc__cta {
  margin-top: 1.5rem;
}

.chapter-meta {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
  margin-bottom: 1rem;
}

/* Prose base */
.prose {
  font-family: var(--font-serif);
  font-size: 1.125rem;
  line-height: 1.75;
}

.prose h1 {
  font-family: var(--font-sans);
  font-size: clamp(1.75rem, 4vw, 2.5rem);
  font-weight: 800;
  letter-spacing: -0.03em;
  line-height: 1.15;
  margin: 0 0 1.25rem;
}

.prose h2 {
  font-family: var(--font-sans);
  font-size: clamp(1.35rem, 2.5vw, 1.65rem);
  font-weight: 800;
  margin: 2.75rem 0 1rem;
  padding-top: 0.5rem;
  letter-spacing: -0.02em;
}

.prose h3 {
  font-family: var(--font-sans);
  font-size: 1.15rem;
  font-weight: 700;
  margin: 2rem 0 0.75rem;
  color: var(--accent);
}

.prose h4 {
  font-family: var(--font-sans);
  font-size: 1rem;
  font-weight: 800;
  margin: 1.75rem 0 0.5rem;
  color: var(--text);
  padding-left: 0.75rem;
  border-left: 3px solid var(--accent-warm);
}

.prose p {
  margin: 0 0 1.15rem;
}

.prose ul,
.prose ol {
  margin: 0 0 1.15rem;
  padding-left: 1.5rem;
}

.prose table {
  width: 100%;
  border-collapse: collapse;
  margin: 1.5rem 0;
  font-family: var(--font-sans);
  font-size: 0.9rem;
}

.prose th,
.prose td {
  padding: 0.75rem 1rem;
  border: 1px solid var(--border);
  text-align: left;
}

.prose th {
  background: var(--bg-muted);
  font-weight: 700;
}

.chapter-nav {
  display: flex;
  flex-wrap: wrap;
  gap: 1rem;
  justify-content: space-between;
  align-items: center;
  margin-top: 3rem;
  padding-top: 2rem;
  border-top: 1px solid var(--border);
  font-family: var(--font-sans);
  font-size: 0.9rem;
}

.chapter-nav__link {
  font-weight: 600;
  text-decoration: none;
}

.chapter-nav__link--next {
  text-align: right;
}

.chapter-nav__mid {
  color: var(--text-muted);
  text-decoration: none;
}

/* Visual components */
.principle-grid,
.strike-cards {
  display: grid;
  gap: 1rem;
  margin: 2rem 0;
  font-family: var(--font-sans);
}

@media (min-width: 640px) {
  .principle-grid {
    grid-template-columns: repeat(2, 1fr);
  }

  .strike-cards {
    grid-template-columns: repeat(2, 1fr);
  }
}

@media (min-width: 900px) {
  .strike-cards {
    grid-template-columns: repeat(3, 1fr);
  }
}

.principle-card,
.strike-card {
  padding: 1.25rem;
  background: var(--bg-elevated);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  transition: transform var(--transition);
}

.strike-card__n {
  font-size: 0.6875rem;
  font-weight: 800;
  color: var(--accent-warm);
  letter-spacing: 0.08em;
}

.strike-card h4 {
  margin: 0.35rem 0 0.5rem;
  border: none;
  padding: 0;
  font-size: 1rem;
}

.strike-card p {
  margin: 0;
  font-size: 0.875rem;
  color: var(--text-muted);
}

.timeline {
  margin: 2rem 0;
  padding-left: 1.5rem;
  border-left: 2px solid var(--accent);
  font-family: var(--font-sans);
}

.timeline-item {
  margin-bottom: 1.5rem;
  padding-left: 1rem;
}

.lever-diagram {
  display: flex;
  align-items: center;
  justify-content: center;
  flex-wrap: wrap;
  gap: 0.5rem;
  margin: 2rem 0;
  padding: 1.5rem;
  background: var(--bg-muted);
  border-radius: var(--radius-lg);
  font-family: var(--font-sans);
  font-weight: 700;
  font-size: 0.9rem;
}

.lever-diagram span:not(.arrow) {
  padding: 0.5rem 1rem;
  background: var(--bg-elevated);
  border-radius: 10px;
  border: 1px solid var(--border);
}

.lever-diagram .arrow {
  color: var(--accent-warm);
  border: none;
  background: none;
}

.center-diagram {
  display: flex;
  flex-direction: column;
  align-items: center;
  margin: 2rem 0;
  font-family: var(--font-sans);
  font-weight: 700;
  color: var(--accent);
}

.center-diagram__ring {
  width: 160px;
  height: 160px;
  border-radius: 50%;
  border: 2px solid var(--accent);
  background: radial-gradient(circle, rgba(232, 93, 76, 0.15) 40%, transparent 70%);
  margin-bottom: 0.5rem;
}

.accordion details {
  border: 1px solid var(--border);
  border-radius: var(--radius);
  margin-bottom: 0.5rem;
  background: var(--bg-elevated);
  font-family: var(--font-sans);
}

.accordion summary {
  padding: 1rem 1.25rem;
  font-weight: 700;
  cursor: pointer;
  list-style: none;
}

.accordion summary::-webkit-details-marker {
  display: none;
}

.accordion .accordion-body {
  padding: 0 1.25rem 1.25rem;
  font-size: 0.9rem;
  color: var(--text-muted);
}

.checklist {
  list-style: none;
  margin: 0;
  padding: 0;
  font-family: var(--font-sans);
}

.checklist li {
  display: flex;
  gap: 0.75rem;
  padding: 0.85rem 0;
  border-bottom: 1px solid var(--border);
}

.checklist input {
  margin-top: 0.35rem;
  accent-color: var(--accent);
}

.glossary-term {
  margin-bottom: 1.75rem;
  padding-bottom: 1.75rem;
  border-bottom: 1px solid var(--border);
}

.glossary-term dt {
  font-family: var(--font-sans);
  font-weight: 800;
  margin-bottom: 0.35rem;
}

.glossary-term dd {
  margin: 0;
  color: var(--text-muted);
}

.faq-list details {
  border-bottom: 1px solid var(--border);
}

.faq-list summary {
  padding: 1.1rem 0;
  font-weight: 700;
  cursor: pointer;
  list-style: none;
}

.faq-list summary::-webkit-details-marker {
  display: none;
}

.faq-list p {
  margin: 0 0 1.25rem;
  color: var(--text-muted);
}

.kb-article {
  opacity: 1;
  transform: none;
}

.reveal {
  opacity: 0;
  transform: translateY(24px);
  transition: opacity 0.7s ease, transform 0.7s ease;
}

.reveal.is-visible {
  opacity: 1;
  transform: none;
}

@media (prefers-reduced-motion: reduce) {
  .reveal {
    opacity: 1;
    transform: none;
    transition: none;
  }
}

.pill-link {
  display: inline-block;
  padding: 0.65rem 1.25rem;
  margin-right: 0.5rem;
  background: var(--bg-elevated);
  border: 1px solid var(--border);
  border-radius: var(--radius-pill);
  font-weight: 700;
  font-size: 0.9rem;
  text-decoration: none;
  color: var(--text);
}

.pill-link:hover {
  border-color: var(--accent);
  color: var(--accent);
}