.kb-hero {
  padding: 64px 0 54px;
  background:
    radial-gradient(circle at 15% 0%, rgba(21, 93, 252, .14), transparent 30%),
    linear-gradient(180deg, #ffffff 0%, #f6f9fc 100%);
}

.kb-hero-grid {
  display: grid;
  grid-template-columns: minmax(0, 1.25fr) minmax(280px, .75fr);
  gap: 42px;
  align-items: center;
}

.kb-hero h1,
.kb-article-hero h1 {
  max-width: 840px;
  font-size: clamp(34px, 5vw, 58px);
}

.kb-search {
  position: relative;
  margin-top: 28px;
}

.kb-search label {
  display: block;
  margin-bottom: 8px;
  font-size: 14px;
  font-weight: 700;
}

.kb-search input {
  width: 100%;
  min-height: 52px;
  padding: 12px 48px 12px 16px;
  border: 1px solid #b8c7dc;
  border-radius: 8px;
  color: var(--ink);
  background: #ffffff;
  font: inherit;
  font-size: 16px;
}

.kb-search input:focus-visible,
.kb-category-filter:focus-visible,
.kb-article-card:focus-visible,
.kb-toc a:focus-visible,
.kb-support-link:focus-visible {
  outline: 3px solid rgba(21, 93, 252, .28);
  outline-offset: 3px;
}

.kb-search-icon {
  position: absolute;
  right: 16px;
  bottom: 15px;
  width: 22px;
  height: 22px;
  color: var(--brand-dark);
  pointer-events: none;
}

.kb-summary-card {
  padding: 26px;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: #ffffff;
  box-shadow: 0 20px 50px rgba(16, 24, 40, .09);
}

.kb-summary-card h2 {
  margin-bottom: 16px;
  font-size: 22px;
}

.kb-summary-list {
  display: grid;
  gap: 14px;
  list-style: none;
}

.kb-summary-list li {
  display: grid;
  grid-template-columns: 34px 1fr;
  gap: 12px;
  align-items: start;
  color: #344054;
}

.kb-summary-number {
  display: grid;
  width: 34px;
  height: 34px;
  place-items: center;
  border-radius: 8px;
  color: var(--brand-dark);
  background: #eaf1ff;
  font-weight: 700;
}

.kb-catalog-section {
  padding: 62px 0 72px;
}

.kb-filter-row {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin-bottom: 26px;
}

.kb-category-filter {
  min-height: 40px;
  padding: 8px 14px;
  border: 1px solid #b8c7dc;
  border-radius: 999px;
  color: #344054;
  background: #ffffff;
  cursor: pointer;
  font: inherit;
  font-size: 14px;
  font-weight: 600;
}

.kb-category-filter:hover,
.kb-category-filter[aria-pressed="true"] {
  color: #ffffff;
  border-color: var(--brand);
  background: var(--brand);
}

.kb-article-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 20px;
}

.kb-article-card {
  display: flex;
  min-height: 260px;
  flex-direction: column;
  padding: 24px;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: #ffffff;
  transition: border-color .18s ease, box-shadow .18s ease, transform .18s ease;
}

.kb-article-card[hidden] {
  display: none;
}

.kb-article-card:hover {
  border-color: #9ab8f8;
  box-shadow: 0 18px 42px rgba(16, 24, 40, .09);
  transform: translateY(-2px);
}

.kb-card-category {
  margin-bottom: 14px;
  color: var(--brand-dark);
  font-size: 13px;
  font-weight: 700;
  text-transform: uppercase;
}

.kb-article-card h3 {
  margin-bottom: 10px;
  font-size: 22px;
  line-height: 1.25;
}

.kb-article-card p {
  color: var(--muted);
}

.kb-card-meta {
  display: flex;
  flex-wrap: wrap;
  gap: 8px 16px;
  margin-top: auto;
  padding-top: 22px;
  color: #475467;
  font-size: 13px;
}

.kb-empty-state {
  padding: 34px;
  border: 1px dashed #b8c7dc;
  border-radius: 8px;
  color: var(--muted);
  background: var(--surface);
  text-align: center;
}

.kb-empty-state[hidden] {
  display: none;
}

.kb-help-band {
  padding: 52px 0;
  color: #ffffff;
  background: var(--nav);
}

.kb-help-band .container {
  display: grid;
  grid-template-columns: 1fr auto;
  gap: 26px;
  align-items: center;
}

.kb-help-band h2 {
  margin-bottom: 8px;
  font-size: clamp(26px, 3vw, 36px);
}

.kb-help-band p {
  max-width: 700px;
  color: #cbd5e1;
}

.kb-article-hero {
  padding: 48px 0 42px;
  border-bottom: 1px solid var(--line);
  background: linear-gradient(180deg, #ffffff 0%, #f7faff 100%);
}

.kb-article-lead {
  max-width: 780px;
  margin-top: 18px;
  color: var(--muted);
  font-size: 19px;
}

.kb-article-meta {
  display: flex;
  flex-wrap: wrap;
  gap: 10px 22px;
  margin-top: 24px;
  color: #475467;
  font-size: 14px;
}

.kb-article-meta span {
  display: inline-flex;
  gap: 6px;
  align-items: center;
}

.kb-article-layout {
  display: grid;
  grid-template-columns: minmax(0, 1fr) 260px;
  gap: 48px;
  align-items: start;
  padding-top: 52px;
  padding-bottom: 76px;
}

.kb-article-content {
  min-width: 0;
}

.kb-article-content > section {
  scroll-margin-top: 90px;
}

.kb-article-content > section + section {
  margin-top: 52px;
}

.kb-figure {
  margin: 24px 0 4px;
}

.kb-figure a {
  display: block;
  overflow: hidden;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: var(--surface);
  box-shadow: 0 12px 32px rgba(16, 24, 40, .08);
}

.kb-figure a:focus-visible {
  outline: 3px solid rgba(37, 99, 235, .28);
  outline-offset: 3px;
}

.kb-figure img {
  display: block;
  width: 100%;
  height: auto;
}

.kb-figure figcaption {
  margin-top: 10px;
  color: var(--muted);
  font-size: 13px;
  line-height: 1.55;
}

.kb-image-hint {
  color: var(--brand-dark);
  font-weight: 700;
}

.kb-article-content h2 {
  margin-bottom: 16px;
  font-size: clamp(26px, 3vw, 34px);
  line-height: 1.2;
}

.kb-article-content h3 {
  margin-bottom: 8px;
  font-size: 20px;
  line-height: 1.3;
}

.kb-article-content p + p {
  margin-top: 12px;
}

.kb-article-content ul,
.kb-article-content ol:not(.kb-steps) {
  display: grid;
  gap: 9px;
  margin: 16px 0 0 24px;
}

.kb-toc {
  position: sticky;
  top: 88px;
  padding: 20px;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: #ffffff;
}

.kb-toc strong {
  display: block;
  margin-bottom: 12px;
  font-size: 15px;
}

.kb-toc nav {
  display: grid;
  gap: 9px;
}

.kb-toc a {
  color: #475467;
  font-size: 14px;
}

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

.kb-prerequisites {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 14px;
  margin-top: 20px;
}

.kb-prerequisite {
  padding: 18px;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: var(--surface);
}

.kb-prerequisite strong {
  display: block;
  margin-bottom: 5px;
}

.kb-prerequisite p {
  color: var(--muted);
  font-size: 14px;
}

.kb-steps {
  display: grid;
  gap: 20px;
  margin: 22px 0 0;
  list-style: none;
  counter-reset: kb-step;
}

.kb-step {
  position: relative;
  padding: 24px 24px 24px 72px;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: #ffffff;
  counter-increment: kb-step;
}

.kb-step::before {
  content: counter(kb-step);
  position: absolute;
  top: 22px;
  left: 22px;
  display: grid;
  width: 34px;
  height: 34px;
  place-items: center;
  border-radius: 8px;
  color: #ffffff;
  background: var(--brand);
  font-weight: 700;
}

.kb-step p,
.kb-step li {
  color: #475467;
}

.kb-path {
  display: inline-flex;
  flex-wrap: wrap;
  gap: 6px;
  margin-top: 12px;
  color: var(--brand-dark);
  font-size: 14px;
  font-weight: 700;
}

.kb-path span + span::before {
  content: "›";
  margin-right: 6px;
  color: #98a2b3;
}

.kb-ui-label {
  padding: 1px 6px;
  border: 1px solid #bfd0eb;
  border-radius: 5px;
  color: #173b78;
  background: #f5f8ff;
  font-weight: 700;
  white-space: nowrap;
}

.kb-notice {
  margin-top: 20px;
  padding: 18px 20px;
  border-left: 4px solid var(--brand);
  border-radius: 0 8px 8px 0;
  background: #eff5ff;
}

.kb-notice--warning {
  border-left-color: #dc6803;
  background: #fff7ed;
}

.kb-notice--success {
  border-left-color: var(--success);
  background: #ecfdf3;
}

.kb-notice strong {
  display: block;
  margin-bottom: 4px;
}

.kb-choice-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 16px;
  margin-top: 20px;
}

.kb-choice-card {
  padding: 20px;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: #ffffff;
}

.kb-choice-card--primary {
  border-color: #9ab8f8;
  background: #f7faff;
}

.kb-choice-card p {
  margin-top: 8px;
  color: var(--muted);
  font-size: 14px;
}

.kb-troubleshooting {
  display: grid;
  gap: 12px;
  margin-top: 20px;
}

.kb-troubleshooting details {
  border: 1px solid var(--line);
  border-radius: 8px;
  background: #ffffff;
}

.kb-troubleshooting summary {
  padding: 16px 18px;
  cursor: pointer;
  font-weight: 700;
}

.kb-troubleshooting details p {
  padding: 0 18px 18px;
  color: var(--muted);
}

.kb-related-links {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 14px;
  margin-top: 20px;
}

.kb-support-link {
  padding: 18px;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: var(--surface);
}

.kb-support-link strong {
  display: block;
  color: var(--brand-dark);
}

.kb-support-link span {
  color: var(--muted);
  font-size: 14px;
}

@media (max-width: 900px) {
  .kb-hero-grid,
  .kb-article-layout {
    grid-template-columns: 1fr;
  }

  .kb-toc {
    position: static;
    order: -1;
  }

  .kb-article-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
}

@media (max-width: 640px) {
  .kb-hero {
    padding: 44px 0 40px;
  }

  .kb-article-grid,
  .kb-prerequisites,
  .kb-choice-grid,
  .kb-related-links {
    grid-template-columns: 1fr;
  }

  .kb-category-filter,
  .kb-search input {
    min-height: 44px;
  }

  .kb-step {
    padding: 66px 18px 20px;
  }

  .kb-step::before {
    top: 18px;
    left: 18px;
  }

  .kb-help-band .container {
    grid-template-columns: 1fr;
  }

  .kb-help-band .btn {
    width: 100%;
  }
}

@media (prefers-reduced-motion: reduce) {
  html {
    scroll-behavior: auto;
  }

  .kb-article-card {
    transition: none;
  }
}