/* ==============================================================
   KIWAG.com — chapter.css
   Einheitliches Layout für ALLE Wissens-Kapitelseiten.
   Kein eigenes <style> mehr in den Seiten nötig!
   ============================================================== */

/* ---------------------------------------------------------------
   SEITEN-WRAPPER
--------------------------------------------------------------- */
.chapter-page {
    background: #fff;
}

/* ---------------------------------------------------------------
   HERO — oben auf jeder Kapitelseite
--------------------------------------------------------------- */
.chapter-hero {
    background:
        radial-gradient(circle at 85% 10%, rgba(110,231,183,0.18), transparent 30%),
        linear-gradient(155deg, #06231c 0%, var(--accent) 65%, #0a3d30 100%);
    color: #fff;
    padding: 3.2rem 0 3rem;
    overflow: hidden;
}
.chapter-hero-inner {
    max-width: 860px;
}
.chapter-badge {
    display: inline-flex;
    align-items: center;
    gap: 0.45rem;
    padding: 0.35rem 0.75rem;
    border-radius: var(--radius-md);
    border: 1px solid rgba(255,255,255,0.22);
    background: rgba(255,255,255,0.09);
    color: #c9f7df;
    font-size: 0.82rem;
    font-weight: 800;
    letter-spacing: 0.01em;
    margin-bottom: 1rem;
}
.chapter-hero h1 {
    color: #fff;
    margin: 0 0 0.85rem;
    font-size: clamp(1.7rem, 4vw, 2.4rem);
    line-height: 1.2;
}
.chapter-hero h1 em {
    color: #8DF2C0;
    font-style: normal;
}
.chapter-hero p {
    color: rgba(255,255,255,0.82);
    font-size: 1.05rem;
    line-height: 1.8;
    max-width: 720px;
    margin: 0;
}
.chapter-hero-meta {
    display: flex;
    flex-wrap: wrap;
    gap: 1.25rem;
    margin-top: 1.5rem;
}
.chapter-hero-meta span {
    color: rgba(255,255,255,0.65);
    font-size: 0.84rem;
    display: flex;
    align-items: center;
    gap: 0.35rem;
}

/* ---------------------------------------------------------------
   STICKY KAPITEL-NAVIGATION (kommt aus _chapter-nav.php)
--------------------------------------------------------------- */
.chapter-subnav {
    position: sticky;
    top: 0;
    z-index: 20;
    background: rgba(255,255,255,0.97);
    border-bottom: 1px solid var(--color-border);
    backdrop-filter: blur(12px);
}
.chapter-subnav-inner {
    display: flex;
    gap: 0.35rem;
    overflow-x: auto;
    padding: 0.65rem 0;
    scrollbar-width: none;
}
.chapter-subnav-inner::-webkit-scrollbar { display: none; }
.chapter-subnav a {
    flex: 0 0 auto;
    color: var(--color-text-soft);
    text-decoration: none;
    font-size: 0.83rem;
    font-weight: 700;
    padding: 0.42rem 0.75rem;
    border-radius: var(--radius-md);
    border: 1px solid transparent;
    white-space: nowrap;
    transition: background var(--transition-fast), color var(--transition-fast), border-color var(--transition-fast);
}
.chapter-subnav a:hover {
    color: var(--accent);
    background: var(--accent-light);
    border-color: rgba(0,0,0,0.06);
}
.chapter-subnav a.active {
    color: var(--accent);
    background: var(--accent-light);
    border-color: rgba(0,0,0,0.07);
}

/* ---------------------------------------------------------------
   INHALT-WRAPPER
--------------------------------------------------------------- */
.chapter-content {
    padding: 2.8rem 0 4rem;
}
.chapter-narrow {
    max-width: 860px;
    margin: 0 auto;
    padding: 0 1.25rem;
}

/* ---------------------------------------------------------------
   ABSCHNITT-TRENNER
--------------------------------------------------------------- */
.chapter-section {
    padding: 2.8rem 0;
}
.chapter-section + .chapter-section {
    border-top: 1px solid var(--color-border-soft);
}
.chapter-section.alt {
    background: linear-gradient(180deg, #F8FAFC 0%, #fff 100%);
    border-radius: var(--radius-lg);
    padding: 2.4rem 2rem;
    margin: 2rem 0;
}

/* ---------------------------------------------------------------
   ABSCHNITTS-KOPF
--------------------------------------------------------------- */
.chapter-kicker {
    display: block;
    color: var(--accent);
    font-size: 0.78rem;
    font-weight: 900;
    text-transform: uppercase;
    letter-spacing: 0.06em;
    margin-bottom: 0.5rem;
}
.chapter-section h2 {
    color: #10241f;
    margin: 0 0 0.65rem;
    font-size: clamp(1.2rem, 2.5vw, 1.55rem);
}
.chapter-lead {
    color: var(--color-text-soft);
    font-size: 1rem;
    line-height: 1.8;
    margin: 0 0 1.75rem;
    max-width: 740px;
}

/* ---------------------------------------------------------------
   CARDS — 2er und 3er Grid
--------------------------------------------------------------- */
.chapter-cards {
    display: grid;
    grid-template-columns: repeat(3, minmax(0,1fr));
    gap: 1rem;
}
.chapter-cards.two-col {
    grid-template-columns: repeat(2, minmax(0,1fr));
}
.chapter-card {
    background: #fff;
    border: 1px solid var(--color-border);
    border-radius: var(--radius-lg);
    padding: 1.25rem;
    transition: transform var(--transition-base), box-shadow var(--transition-base), border-color var(--transition-base);
}
.chapter-card:hover {
    transform: translateY(-3px);
    border-color: var(--accent-light);
    box-shadow: var(--shadow-lg);
}
.chapter-card-icon {
    width: 44px;
    height: 44px;
    border-radius: var(--radius-md);
    background: var(--accent);
    color: #fff;
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: 900;
    font-size: 1.1rem;
    margin-bottom: 0.8rem;
    flex-shrink: 0;
}
.chapter-card-icon.green  { background: #0F6E56; }
.chapter-card-icon.red    { background: #B42318; }
.chapter-card-icon.blue   { background: #185FA5; }
.chapter-card-icon.amber  { background: #BA7517; }
.chapter-card-icon.purple { background: #6D28D9; }
.chapter-card h3 {
    font-size: 0.98rem;
    font-weight: 800;
    margin: 0 0 0.45rem;
    color: #10241f;
}
.chapter-card p {
    font-size: 0.9rem;
    line-height: 1.7;
    color: var(--color-text-soft);
    margin: 0;
}

/* ---------------------------------------------------------------
   VERGLEICHS-BOXEN (2-3 Spalten nebeneinander)
--------------------------------------------------------------- */
.chapter-compare {
    display: grid;
    grid-template-columns: repeat(2, minmax(0,1fr));
    gap: 1rem;
}
.chapter-compare.three-col {
    grid-template-columns: repeat(3, minmax(0,1fr));
}
.chapter-box {
    border-radius: var(--radius-lg);
    padding: 1.35rem;
    border: 1.5px solid transparent;
}
.chapter-box.good {
    background: #F0FDF4;
    border-color: #BBF7D0;
}
.chapter-box.bad {
    background: #FFF8F8;
    border-color: #FECACA;
}
.chapter-box.warn {
    background: #FFFBEB;
    border-color: #FDE68A;
}
.chapter-box.info {
    background: #EFF6FF;
    border-color: #BFDBFE;
}
.chapter-box.neutral {
    background: #F8FAFC;
    border-color: var(--color-border);
}
.chapter-box h3 {
    font-size: 0.98rem;
    font-weight: 800;
    margin: 0 0 0.65rem;
}
.chapter-box.good h3  { color: #065F46; }
.chapter-box.bad h3   { color: #991B1B; }
.chapter-box.warn h3  { color: #92400E; }
.chapter-box.info h3  { color: #1E40AF; }
.chapter-box.neutral h3 { color: #10241f; }
.chapter-box p, .chapter-box li {
    font-size: 0.88rem;
    line-height: 1.7;
    color: var(--color-text-soft);
    margin: 0;
}
.chapter-box ul {
    margin: 0;
    padding-left: 1.1rem;
}
.chapter-box li { margin-bottom: 0.3rem; }

/* ---------------------------------------------------------------
   FAKTEN-STREIFEN (farbig links)
--------------------------------------------------------------- */
.chapter-facts {
    display: grid;
    grid-template-columns: repeat(2, minmax(0,1fr));
    gap: 0.85rem;
}
.chapter-fact {
    background: #fff;
    border: 1px solid var(--color-border);
    border-left: 5px solid var(--accent);
    border-radius: 0 var(--radius-md) var(--radius-md) 0;
    padding: 1rem 1.2rem;
}
.chapter-fact.good   { border-left-color: #0F6E56; }
.chapter-fact.red    { border-left-color: #B42318; }
.chapter-fact.blue   { border-left-color: #185FA5; }
.chapter-fact.amber  { border-left-color: #BA7517; }
.chapter-fact h3 {
    font-size: 0.93rem;
    font-weight: 800;
    margin: 0 0 0.4rem;
    color: #10241f;
}
.chapter-fact p {
    font-size: 0.87rem;
    line-height: 1.7;
    color: var(--color-text-soft);
    margin: 0;
}

/* ---------------------------------------------------------------
   KENNZAHLEN — grosse Zahlen
--------------------------------------------------------------- */
.chapter-stats {
    display: grid;
    grid-template-columns: repeat(3, minmax(0,1fr));
    gap: 1rem;
    margin: 1.5rem 0;
}
.chapter-stat {
    background: #fff;
    border: 1px solid var(--color-border);
    border-radius: var(--radius-lg);
    padding: 1.5rem 1.25rem;
    text-align: center;
    transition: transform var(--transition-base), box-shadow var(--transition-base);
}
.chapter-stat:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow-md);
}
.chapter-stat-value {
    font-size: 2.2rem;
    font-weight: 900;
    color: var(--accent);
    line-height: 1;
    margin-bottom: 0.4rem;
    font-family: var(--font-display);
}
.chapter-stat-label {
    font-size: 0.84rem;
    color: var(--color-text-soft);
    line-height: 1.5;
}

/* ---------------------------------------------------------------
   VERGLEICHS-TABELLE
--------------------------------------------------------------- */
.chapter-table-wrap {
    overflow-x: auto;
    border-radius: var(--radius-lg);
    border: 1px solid var(--color-border);
    margin: 1.25rem 0;
}
.chapter-table {
    width: 100%;
    border-collapse: collapse;
    font-size: 0.9rem;
}
.chapter-table th {
    background: #F8FAFC;
    color: #10241f;
    font-weight: 800;
    padding: 0.9rem 1rem;
    text-align: left;
    border-bottom: 2px solid var(--color-border);
}
.chapter-table th.accent {
    background: var(--accent);
    color: #fff;
}
.chapter-table td {
    padding: 0.85rem 1rem;
    border-bottom: 1px solid var(--color-border-soft);
    color: var(--color-text-soft);
    vertical-align: top;
}
.chapter-table tr:last-child td { border-bottom: none; }
.chapter-table tr:hover td { background: #FAFAF9; }
.chapter-table .good { color: #065F46; font-weight: 700; }
.chapter-table .bad  { color: #991B1B; font-weight: 700; }
.chapter-table .warn { color: #92400E; font-weight: 700; }

/* ---------------------------------------------------------------
   ZINSESZINS-BALKEN-CHART (visuell, kein JS)
--------------------------------------------------------------- */
.chapter-chart {
    background: #F8FAFC;
    border: 1px solid var(--color-border);
    border-radius: var(--radius-lg);
    padding: 1.5rem;
    margin: 1.25rem 0;
}
.chapter-chart-title {
    font-size: 0.9rem;
    font-weight: 800;
    color: #10241f;
    margin-bottom: 1.25rem;
}
.chapter-chart-row {
    display: flex;
    align-items: center;
    gap: 0.85rem;
    margin-bottom: 0.85rem;
}
.chapter-chart-row:last-child { margin-bottom: 0; }
.chapter-chart-label {
    font-size: 0.82rem;
    font-weight: 700;
    color: var(--color-text-soft);
    min-width: 120px;
    flex-shrink: 0;
}
.chapter-chart-bar-wrap {
    flex: 1;
    background: var(--color-border-soft);
    border-radius: var(--radius-full);
    height: 28px;
    overflow: hidden;
    position: relative;
}
.chapter-chart-bar {
    height: 100%;
    border-radius: var(--radius-full);
    background: var(--accent);
    display: flex;
    align-items: center;
    justify-content: flex-end;
    padding-right: 0.75rem;
    font-size: 0.8rem;
    font-weight: 800;
    color: #fff;
    min-width: 3rem;
    transition: width 1s cubic-bezier(0.4,0,0.2,1);
}
.chapter-chart-bar.red    { background: #B42318; }
.chapter-chart-bar.amber  { background: #D97706; }
.chapter-chart-bar.green  { background: #0F6E56; }
.chapter-chart-bar.blue   { background: #185FA5; }

/* Label rechts neben Balken */
.chapter-chart-value {
    font-size: 0.8rem;
    font-weight: 800;
    color: var(--color-text);
    min-width: 120px;
    margin-left: 1rem;
    white-space: nowrap;
}

/* ---------------------------------------------------------------
   CALLOUTS / ALERTS
--------------------------------------------------------------- */
.chapter-alert {
    border-radius: var(--radius-md);
    padding: 1rem 1.25rem;
    font-size: 0.9rem;
    line-height: 1.7;
    margin: 1.25rem 0;
    display: flex;
    gap: 0.75rem;
    align-items: flex-start;
}
.chapter-alert-icon { font-size: 1.1rem; flex-shrink: 0; margin-top: 0.1rem; }
.chapter-alert.info    { background: #EFF6FF; border-left: 4px solid #3B82F6; color: #1E3A5F; }
.chapter-alert.warn    { background: #FFFBEB; border-left: 4px solid #F59E0B; color: #78350F; }
.chapter-alert.success { background: #F0FDF4; border-left: 4px solid #22C55E; color: #14532D; }
.chapter-alert.danger  { background: #FFF8F8; border-left: 4px solid #EF4444; color: #7F1D1D; }
.chapter-alert strong { font-weight: 800; }

/* ---------------------------------------------------------------
   ZITAT / BLOCKQUOTE
--------------------------------------------------------------- */
.chapter-quote {
    border-left: 4px solid var(--accent);
    background: var(--accent-light);
    border-radius: 0 var(--radius-md) var(--radius-md) 0;
    padding: 1.1rem 1.4rem;
    margin: 1.5rem 0;
    font-size: 0.96rem;
    font-style: italic;
    color: #10241f;
    line-height: 1.75;
}

/* ---------------------------------------------------------------
   SCHRITTE / NUMMERIERTE LISTE
--------------------------------------------------------------- */
.chapter-steps {
    display: flex;
    flex-direction: column;
    gap: 0.85rem;
}
.chapter-step {
    display: flex;
    gap: 1rem;
    align-items: flex-start;
    background: #fff;
    border: 1px solid var(--color-border);
    border-radius: var(--radius-lg);
    padding: 1.1rem 1.25rem;
    transition: border-color var(--transition-base), box-shadow var(--transition-base);
}
.chapter-step:hover {
    border-color: var(--accent-light);
    box-shadow: var(--shadow-sm);
}
.chapter-step-num {
    width: 34px;
    height: 34px;
    border-radius: var(--radius-md);
    background: var(--accent-light);
    color: var(--accent);
    font-weight: 900;
    font-size: 0.9rem;
    display: flex;
    align-items: center;
    justify-content: center;
    flex-shrink: 0;
}
.chapter-step-body h3 {
    font-size: 0.96rem;
    font-weight: 800;
    margin: 0 0 0.3rem;
    color: #10241f;
}
.chapter-step-body p {
    font-size: 0.88rem;
    line-height: 1.7;
    color: var(--color-text-soft);
    margin: 0;
}

/* ---------------------------------------------------------------
   PAGER (Vor/Zurück zwischen Kapiteln)
--------------------------------------------------------------- */
.chapter-pager {
    display: flex;
    gap: 1rem;
    justify-content: space-between;
    align-items: center;
    padding: 2rem 0 0;
    border-top: 1px solid var(--color-border-soft);
    margin-top: 2.5rem;
    flex-wrap: wrap;
}
.chapter-pager a {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    padding: 0.7rem 1.25rem;
    border-radius: var(--radius-md);
    border: 1.5px solid var(--color-border);
    color: var(--color-text);
    text-decoration: none;
    font-weight: 700;
    font-size: 0.88rem;
    transition: border-color var(--transition-fast), background var(--transition-fast), color var(--transition-fast);
}
.chapter-pager a:hover {
    border-color: var(--accent);
    color: var(--accent);
    background: var(--accent-light);
}
.chapter-pager a.primary {
    background: var(--accent);
    color: #fff;
    border-color: var(--accent);
}
.chapter-pager a.primary:hover {
    background: var(--accent-dark);
    border-color: var(--accent-dark);
    color: #fff;
}

/* ---------------------------------------------------------------
   QUELLEN (am Seitenende)
--------------------------------------------------------------- */
.chapter-sources {
    margin-top: 2.5rem;
    padding-top: 1.5rem;
    border-top: 1px dashed var(--color-border);
}
.chapter-sources summary {
    cursor: pointer;
    font-size: 0.82rem;
    font-weight: 700;
    color: var(--color-text-muted);
    list-style: none;
    display: flex;
    align-items: center;
    gap: 0.4rem;
}
.chapter-sources summary::before { content: '▶'; font-size: 0.65rem; }
details[open] .chapter-sources summary::before { content: '▼'; }
.chapter-sources-list {
    margin-top: 0.85rem;
    display: flex;
    flex-direction: column;
    gap: 0.4rem;
}
.chapter-sources-list a {
    font-size: 0.8rem;
    color: var(--color-text-muted);
    text-decoration: none;
}
.chapter-sources-list a:hover { color: var(--accent); text-decoration: underline; }

/* ---------------------------------------------------------------
   DISCLAIMER-BOX (am Seitenende)
--------------------------------------------------------------- */
.chapter-disclaimer {
    background: #FFFBEB;
    border: 1px solid #FDE68A;
    border-radius: var(--radius-md);
    padding: 1rem 1.25rem;
    font-size: 0.82rem;
    line-height: 1.7;
    color: #78350F;
    margin-top: 1.5rem;
}
.chapter-disclaimer strong { font-weight: 800; }

/* ---------------------------------------------------------------
   VISUELLE TRENNER — Abschnitt-Dekoration
--------------------------------------------------------------- */
.chapter-divider {
  display: flex;
  align-items: center;
  gap: 1rem;
  margin: 2.5rem 0;
  color: var(--color-text-muted);
  font-size: 0.78rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.08em;
}
.chapter-divider::before,
.chapter-divider::after {
  content: '';
  flex: 1;
  height: 1px;
  background: linear-gradient(90deg, transparent, var(--color-border), transparent);
}
.chapter-divider-icon {
  flex-shrink: 0;
  font-size: 1.1rem;
  opacity: 0.6;
}

/* ---------------------------------------------------------------
   KEY-INSIGHT — Hervorgehobene Kernaussage
--------------------------------------------------------------- */
.chapter-insight {
  background: linear-gradient(135deg, var(--accent-light) 0%, #fff 100%);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: 1.5rem 1.75rem;
  margin: 1.75rem 0;
  position: relative;
}
.chapter-insight::before {
  content: '💡';
  position: absolute;
  top: -0.6rem;
  left: 1.25rem;
  font-size: 1.3rem;
  background: #fff;
  padding: 0 0.3rem;
  line-height: 1;
}
.chapter-insight h3 {
  font-size: 1rem;
  font-weight: 800;
  color: var(--accent-dark);
  margin: 0 0 0.4rem;
}
.chapter-insight p {
  font-size: 0.92rem;
  color: var(--color-text);
  line-height: 1.7;
  margin: 0;
  max-width: none;
}

/* ---------------------------------------------------------------
   ZAHLEN-HERVORHEBUNG — große Zahl + Erklärung
--------------------------------------------------------------- */
.chapter-number {
  display: flex;
  align-items: flex-start;
  gap: 1.25rem;
  margin: 1.5rem 0;
  padding: 1.25rem 1.5rem;
  background: var(--color-white);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
}
.chapter-number-value {
  flex-shrink: 0;
  font-family: var(--font-display);
  font-size: 2.8rem;
  font-weight: 400;
  color: var(--accent);
  line-height: 1;
  min-width: 4.5rem;
}
.chapter-number-body h4 {
  font-size: 0.95rem;
  font-weight: 700;
  color: var(--color-text);
  margin: 0 0 0.25rem;
}
.chapter-number-body p {
  font-size: 0.88rem;
  color: var(--color-text-soft);
  line-height: 1.65;
  margin: 0;
  max-width: none;
}

/* ---------------------------------------------------------------
   ILLUSTRATION-PLATZHALTER — wo Grafiken hinkommen
--------------------------------------------------------------- */
.chapter-figure {
  margin: 1.75rem 0;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  overflow: hidden;
  background: linear-gradient(135deg, var(--accent-light) 0%, #F8FAFC 100%);
}
.chapter-figure-placeholder {
  display: flex;
  align-items: center;
  justify-content: center;
  min-height: 200px;
  padding: 2rem;
  text-align: center;
  flex-direction: column;
  gap: 0.6rem;
}
.chapter-figure-placeholder-icon {
  font-size: 2.5rem;
  opacity: 0.6;
}
.chapter-figure-placeholder-text {
  font-size: 0.85rem;
  color: var(--color-text-muted);
  font-weight: 500;
}
.chapter-figure-caption {
  padding: 0.65rem 1rem;
  font-size: 0.78rem;
  color: var(--color-text-soft);
  border-top: 1px solid var(--color-border-soft);
  background: rgba(255,255,255,0.6);
  text-align: center;
}

/* ---------------------------------------------------------------
   SVG-DIAGRAMM — inline SVG chart wrapper
--------------------------------------------------------------- */
.chapter-svg-chart {
  margin: 1.75rem 0;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  overflow: hidden;
  background: var(--color-white);
}
.chapter-svg-chart svg {
  display: block;
  width: 100%;
  height: auto;
}
.chapter-svg-chart-caption {
  padding: 0.65rem 1rem;
  font-size: 0.78rem;
  color: var(--color-text-soft);
  border-top: 1px solid var(--color-border-soft);
  background: #FAFAF9;
  text-align: center;
}

/* ---------------------------------------------------------------
   PROGRESS-BALKEN — horizontale Fortschrittsbalken (Vergleiche)
--------------------------------------------------------------- */
.chapter-progress {
  margin: 1.25rem 0;
}
.chapter-progress-item {
  display: flex;
  align-items: center;
  gap: 0.85rem;
  margin-bottom: 0.85rem;
}
.chapter-progress-item:last-child { margin-bottom: 0; }
.chapter-progress-label {
  font-size: 0.82rem;
  font-weight: 700;
  color: var(--color-text);
  min-width: 110px;
  flex-shrink: 0;
}
.chapter-progress-track {
  flex: 1;
  height: 22px;
  background: var(--color-border-soft);
  border-radius: var(--radius-full);
  overflow: hidden;
  position: relative;
}
.chapter-progress-fill {
  height: 100%;
  border-radius: var(--radius-full);
  display: flex;
  align-items: center;
  justify-content: flex-end;
  padding-right: 0.6rem;
  font-size: 0.72rem;
  font-weight: 800;
  color: #fff;
  min-width: 2.5rem;
  transition: width 0.6s ease;
}
.chapter-progress-fill.green  { background: #0F6E56; }
.chapter-progress-fill.blue   { background: #185FA5; }
.chapter-progress-fill.amber  { background: #BA7517; }
.chapter-progress-fill.red    { background: #B42318; }
.chapter-progress-fill.purple { background: #6D28D9; }
.chapter-progress-value {
  font-size: 0.78rem;
  font-weight: 800;
  color: var(--color-text-soft);
  min-width: 3rem;
  text-align: right;
}

/* ---------------------------------------------------------------
   RESPONSIVE
--------------------------------------------------------------- */
@media (max-width: 900px) {
    .chapter-cards { grid-template-columns: repeat(2, minmax(0,1fr)); }
    .chapter-facts { grid-template-columns: 1fr; }
    .chapter-stats { grid-template-columns: repeat(2, minmax(0,1fr)); }
    .chapter-compare.three-col { grid-template-columns: 1fr; }
}
@media (max-width: 600px) {
    .chapter-cards { grid-template-columns: 1fr; }
    .chapter-compare { grid-template-columns: 1fr; }
    .chapter-stats { grid-template-columns: 1fr; }
    .chapter-section.alt { padding: 1.75rem 1.25rem; }
    .chapter-hero { padding: 2.4rem 0 2rem; }
    .chapter-pager { flex-direction: column; }
    .chapter-pager a { width: 100%; justify-content: center; }
}