.knowledge-shell {
  width: min(980px, 100% - 32px);
  margin: 0 auto;
  padding: 36px 0 56px;
  position: relative;
  z-index: 1;
}

.knowledge-header {
  background: rgba(255, 255, 255, 0.05);
  border: 1px solid var(--stroke);
  border-radius: 20px;
  padding: 24px;
  box-shadow: 0 18px 40px -24px var(--shadow);
}

.knowledge-header h1 {
  margin: 10px 0 14px;
  font-family: "Fraunces", serif;
  font-size: clamp(1.9rem, 3vw, 2.5rem);
}

.brand-link {
  font-family: "Fraunces", serif;
  font-size: 1.3rem;
  letter-spacing: 0.4px;
  color: var(--ink);
  text-decoration: none;
}

.brand-link:hover {
  opacity: 0.88;
}

.knowledge-intro {
  margin: 0;
  color: var(--muted);
  font-size: 1.02rem;
  line-height: 1.6;
}

.breadcrumbs {
  margin: 12px 0 12px;
  display: flex;
  gap: 8px;
  flex-wrap: wrap;
  align-items: center;
  color: var(--muted);
  font-size: 0.88rem;
}

.breadcrumbs a {
  color: var(--accent-2);
  text-decoration: none;
}

.breadcrumbs a:hover {
  text-decoration: underline;
}

.separator {
  opacity: 0.6;
}

.trust-row {
  margin-top: 12px;
  display: flex;
  gap: 16px;
  flex-wrap: wrap;
  color: var(--muted);
  font-size: 0.88rem;
}

.trust-row strong {
  color: var(--ink);
}

.knowledge-stats {
  margin-top: 12px;
  color: var(--muted);
  font-size: 0.92rem;
}

.knowledge-guide {
  margin-top: 18px;
  padding: 20px;
  border-radius: 18px;
  border: 1px solid var(--stroke);
  background: rgba(255, 255, 255, 0.04);
}

.knowledge-guide h2 {
  margin: 0;
  font-size: 1.3rem;
}

.knowledge-guide p {
  margin: 12px 0 0;
  color: var(--muted);
  line-height: 1.7;
}

.knowledge-highlights {
  margin: 14px 0 0;
  padding-left: 1.25rem;
}

.knowledge-highlights li {
  margin: 0.4rem 0;
  color: var(--ink);
}

.pager-row {
  margin-top: 18px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
}

.pager-row-bottom {
  margin-top: 20px;
}

.pager-status {
  color: var(--muted);
  font-size: 0.92rem;
}

.pager-btn {
  border: 1px solid var(--stroke);
  background: rgba(255, 255, 255, 0.08);
  color: var(--ink);
  border-radius: 999px;
  padding: 9px 16px;
  font: inherit;
  font-weight: 600;
  cursor: pointer;
  transition: transform 0.2s ease, background 0.2s ease;
}

.pager-btn:hover:not(:disabled) {
  transform: translateY(-1px);
  background: rgba(255, 255, 255, 0.14);
}

.pager-btn:disabled {
  cursor: not-allowed;
  opacity: 0.45;
}

.question-list {
  margin-top: 18px;
  display: grid;
  gap: 14px;
}

.question-card {
  background: rgba(9, 18, 20, 0.72);
  border: 1px solid var(--stroke);
  border-radius: 16px;
  padding: 16px;
  box-shadow: 0 16px 32px -24px var(--shadow);
}

.question-number {
  margin: 0;
  color: var(--accent-2);
  text-transform: uppercase;
  letter-spacing: 1px;
  font-size: 0.78rem;
}

.question-title {
  margin: 8px 0 0;
  font-size: 1.18rem;
  line-height: 1.4;
}

.answer-toggle {
  margin-top: 12px;
  border: 1px solid rgba(255, 255, 255, 0.2);
  border-radius: 12px;
  overflow: hidden;
  background: rgba(255, 255, 255, 0.03);
}

.answer-toggle summary {
  cursor: pointer;
  list-style: none;
  font-weight: 600;
  padding: 12px 14px;
  position: relative;
}

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

.answer-toggle summary::after {
  content: "+";
  position: absolute;
  right: 14px;
  top: 10px;
  font-size: 1.1rem;
  color: var(--accent-2);
}

.answer-toggle[open] summary::after {
  content: "-";
}

.answer-copy {
  color: var(--muted);
  padding: 0 14px 14px;
  line-height: 1.6;
}

.answer-copy p {
  margin: 0.55rem 0;
}

.answer-copy ul {
  margin: 0.4rem 0 0.8rem;
  padding-left: 1.25rem;
}

.answer-copy li {
  margin: 0.26rem 0;
}

.answer-copy strong {
  color: #ffe0a2;
}

.feature-buttons {
  margin-top: 12px;
  display: flex;
  gap: 10px;
  flex-wrap: wrap;
}

.feature-btn {
  border: 1px solid var(--stroke);
  background: rgba(255, 255, 255, 0.08);
  color: var(--ink);
  border-radius: 999px;
  padding: 8px 13px;
  font: inherit;
  font-size: 0.88rem;
  cursor: pointer;
  transition: transform 0.2s ease, background 0.2s ease, border-color 0.2s ease;
}

.feature-btn:hover {
  transform: translateY(-1px);
  background: rgba(255, 255, 255, 0.14);
  border-color: rgba(255, 255, 255, 0.34);
}

.feature-teaser {
  margin-top: 10px;
  border: 1px dashed rgba(255, 209, 102, 0.5);
  background: rgba(255, 209, 102, 0.08);
  border-radius: 12px;
  padding: 12px;
}

.feature-teaser p {
  margin: 0;
  color: #f7e5c5;
}

.feature-teaser .cta {
  margin-top: 10px;
}

.feature-teaser-actions {
  margin-top: 10px;
  display: flex;
  gap: 10px;
  flex-wrap: wrap;
}

.feature-teaser-actions .cta {
  margin-top: 0;
}

.page-error {
  margin-top: 18px;
  padding: 14px;
  border-radius: 12px;
  background: rgba(244, 67, 54, 0.2);
  border: 1px solid rgba(244, 67, 54, 0.4);
  color: #ffd7d7;
}

.practice-cta {
  margin-top: 24px;
  padding: 22px;
  border-radius: 18px;
  border: 1px solid var(--stroke);
  background: linear-gradient(145deg, rgba(255, 154, 60, 0.16), rgba(255, 209, 102, 0.1));
}

.practice-cta h2 {
  margin: 0;
  font-family: "Fraunces", serif;
  font-size: clamp(1.45rem, 2.8vw, 1.9rem);
}

.practice-cta p {
  margin: 10px 0 0;
  color: #f0dfbf;
  line-height: 1.6;
}

.practice-cta .cta {
  margin-top: 14px;
}

.topic-cloud {
  margin-top: 24px;
  padding: 20px;
  border-radius: 18px;
  border: 1px solid var(--stroke);
  background: rgba(255, 255, 255, 0.04);
}

.topic-cloud h2 {
  margin: 0 0 12px;
  font-size: 1.3rem;
}

.topic-cloud-grid {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
}

.topic-chip {
  display: inline-flex;
  text-decoration: none;
  color: var(--ink);
  border: 1px solid var(--stroke);
  background: rgba(255, 255, 255, 0.07);
  border-radius: 999px;
  padding: 8px 12px;
  font-size: 0.88rem;
  transition: transform 0.2s ease, background 0.2s ease;
}

.topic-chip:hover {
  transform: translateY(-1px);
  background: rgba(255, 255, 255, 0.15);
}

.topic-chip.active {
  border-color: rgba(255, 209, 102, 0.8);
  background: rgba(255, 209, 102, 0.14);
}

.hub-intro {
  margin: 10px 0 0;
  color: var(--muted);
  line-height: 1.6;
}

.hub-grid {
  margin-top: 20px;
  display: grid;
  gap: 14px;
  grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
}

.hub-card {
  background: rgba(9, 18, 20, 0.72);
  border: 1px solid var(--stroke);
  border-radius: 16px;
  padding: 16px;
  box-shadow: 0 16px 32px -24px var(--shadow);
}

.hub-card h2 {
  margin: 0;
  font-size: 1.12rem;
  line-height: 1.35;
}

.hub-card p {
  margin: 10px 0 0;
  color: var(--muted);
  line-height: 1.55;
}

.hub-card .cta {
  margin-top: 14px;
}

@media (max-width: 860px) {
  .knowledge-shell {
    width: min(980px, 100% - 24px);
  }

  .knowledge-header {
    padding: 18px;
  }
}

@media (max-width: 620px) {
  .pager-row {
    flex-wrap: wrap;
  }

  .pager-status {
    order: 3;
    width: 100%;
    text-align: center;
  }

  .pager-btn {
    flex: 1 1 calc(50% - 8px);
  }
}