.tab-shell {
  border: var(--line-thin) solid var(--color-line);
  background: var(--color-canvas);
}

.tab-list,
[role="tablist"] {
  display: flex;
  max-width: 100%;
  overflow-x: auto;
  border-bottom: var(--line-thin) solid var(--color-line);
  background: var(--color-panel);
  -webkit-overflow-scrolling: touch;
}

.tab-list [role="tab"],
[role="tablist"] [role="tab"] {
  position: relative;
  min-height: 48px;
  flex: 0 0 auto;
  border: 0;
  border-right: var(--line-thin) solid var(--color-line);
  background: transparent;
  padding: 12px 20px;
  color: var(--color-ink-soft);
  font-weight: 700;
  white-space: nowrap;
}

.tab-list [role="tab"]::after,
[role="tablist"] [role="tab"]::after {
  position: absolute;
  right: 0;
  bottom: -1px;
  left: 0;
  height: 4px;
  background: transparent;
  content: "";
}

.tab-list [role="tab"][aria-selected="true"],
[role="tablist"] [role="tab"][aria-selected="true"] {
  background: var(--color-canvas);
  color: var(--color-ink);
}

.tab-list [role="tab"][aria-selected="true"]::after,
[role="tablist"] [role="tab"][aria-selected="true"]::after {
  background: var(--color-accent);
}

[role="tabpanel"] {
  padding: clamp(22px, 4vw, 40px);
}

[role="tabpanel"][hidden] {
  display: none;
}

.toc-tabs {
  position: sticky;
  top: 0;
  z-index: 30;
  display: flex;
  max-width: 100%;
  overflow-x: auto;
  border-top: var(--line-thin) solid var(--color-line);
  border-bottom: var(--line-thin) solid var(--color-line);
  background: var(--color-canvas);
  scrollbar-width: thin;
  -webkit-overflow-scrolling: touch;
}

.toc-tabs a {
  position: relative;
  display: flex;
  min-height: 52px;
  flex: 0 0 auto;
  align-items: center;
  padding: 10px 18px;
  color: var(--color-ink-soft);
  font-family: var(--font-mono);
  font-size: 12px;
  font-weight: 650;
  white-space: nowrap;
}

.toc-tabs a::after {
  position: absolute;
  right: 18px;
  bottom: 0;
  left: 18px;
  height: 4px;
  background: transparent;
  content: "";
}

.toc-tabs a.is-current,
.toc-tabs a[aria-current="true"] {
  color: var(--color-ink);
}

.toc-tabs a.is-current::after,
.toc-tabs a[aria-current="true"]::after {
  background: var(--color-accent);
}

.toc-sticky-host {
  position: sticky;
  z-index: 30;
}

.toc-sticky-host > .toc-tabs {
  position: static;
}

.faq-list {
  border-top: var(--line-thin) solid var(--color-line);
}

.faq-item {
  border-bottom: var(--line-thin) solid var(--color-line);
  background: var(--color-canvas);
}

.faq-item summary {
  position: relative;
  display: flex;
  min-height: 64px;
  align-items: center;
  padding: 16px 48px 16px 16px;
  color: var(--color-ink);
  font-size: 17px;
  font-weight: 750;
  list-style: none;
}

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

.faq-item summary::after {
  position: absolute;
  right: 18px;
  width: 20px;
  height: 20px;
  content: "+";
  color: var(--color-accent);
  font-family: var(--font-mono);
  font-size: 20px;
  line-height: 20px;
  text-align: center;
}

.faq-item[open] summary {
  background: var(--color-panel);
}

.faq-item[open] summary::after {
  content: "−";
}

.faq-answer {
  max-width: 72em;
  padding: 4px 48px 22px 16px;
  color: var(--color-ink-soft);
}

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

.plan-card {
  position: relative;
  display: flex;
  min-height: 100%;
  flex-direction: column;
  border: var(--line-thin) solid var(--color-line);
  background: var(--color-canvas);
  padding: 28px;
}

.plan-card::before {
  position: absolute;
  top: -1px;
  right: -1px;
  left: -1px;
  height: 5px;
  background: var(--color-line);
  content: "";
}

.plan-card.is-featured,
.plan-card[aria-current="true"] {
  border-color: var(--color-accent);
  background: var(--color-panel);
}

.plan-card.is-featured::before,
.plan-card[aria-current="true"]::before {
  background: var(--color-accent);
}

.plan-badge {
  align-self: flex-start;
  margin-bottom: 18px;
  background: var(--color-accent);
  padding: 5px 9px;
  color: var(--color-canvas);
  font-family: var(--font-mono);
  font-size: 11px;
  font-weight: 700;
  letter-spacing: .05em;
}

.plan-name {
  margin-bottom: 8px;
  font-size: 23px;
}

.plan-period {
  color: var(--color-ink-soft);
  font-family: var(--font-mono);
  font-size: 12px;
}

.plan-price {
  display: flex;
  align-items: baseline;
  gap: 7px;
  margin: 18px 0;
  color: var(--color-ink);
}

.plan-price strong {
  font-size: clamp(38px, 5vw, 54px);
  line-height: 1;
}

.plan-features {
  display: grid;
  gap: 10px;
  margin: 0 0 28px;
  padding: 18px 0 0;
  border-top: var(--line-thin) dashed var(--color-line);
  list-style: none;
}

.plan-features li {
  display: flex;
  gap: 9px;
  color: var(--color-ink-soft);
}

.plan-features li::before {
  width: 8px;
  height: 8px;
  flex: 0 0 auto;
  margin-top: .55em;
  background: var(--color-accent);
  content: "";
}

.plan-card .btn {
  width: 100%;
  margin-top: auto;
}

.table-scroll,
.network-table-wrap,
.comparison-table-wrap {
  max-width: 100%;
  overflow-x: auto;
  border: var(--line-thin) solid var(--color-line);
  -webkit-overflow-scrolling: touch;
}

.data-table,
.network-table,
.comparison-table {
  width: 100%;
  min-width: 680px;
  border-collapse: collapse;
  background: var(--color-canvas);
}

.data-table th,
.data-table td,
.network-table th,
.network-table td,
.comparison-table th,
.comparison-table td {
  border-right: var(--line-thin) solid var(--color-line);
  border-bottom: var(--line-thin) solid var(--color-line);
  padding: 13px 15px;
  text-align: left;
  vertical-align: top;
}

.data-table th,
.network-table th,
.comparison-table th {
  background: var(--color-ink);
  color: var(--color-canvas);
  font-family: var(--font-mono);
  font-size: 12px;
  font-weight: 700;
  letter-spacing: .03em;
}

.data-table th:first-child,
.network-table th:first-child,
.comparison-table th:first-child,
.data-table td:first-child,
.network-table td:first-child,
.comparison-table td:first-child {
  color: var(--color-ink);
  font-weight: 700;
}

.data-table th:first-child,
.network-table th:first-child,
.comparison-table th:first-child {
  color: var(--color-canvas);
}

.data-table tbody tr:nth-child(even),
.network-table tbody tr:nth-child(even),
.comparison-table tbody tr:nth-child(even) {
  background: var(--color-panel);
}

.data-table tbody tr:hover,
.network-table tbody tr:hover,
.comparison-table tbody tr:hover {
  background: var(--color-panel-strong);
}

.table-group-row th {
  background: var(--color-accent);
  color: var(--color-canvas);
}

.prose > .data-table {
  display: block;
  min-width: 0;
  max-width: 100%;
  overflow-x: auto;
  -webkit-overflow-scrolling: touch;
}

.platform-grid {
  display: grid;
  grid-template-columns: repeat(5, minmax(0, 1fr));
  border-top: var(--line-thin) solid var(--color-line);
  border-left: var(--line-thin) solid var(--color-line);
}

.platform-card {
  display: flex;
  min-height: 230px;
  flex-direction: column;
  border-right: var(--line-thin) solid var(--color-line);
  border-bottom: var(--line-thin) solid var(--color-line);
  background: var(--color-canvas);
  padding: 22px;
}

.platform-card-icon {
  display: grid;
  width: 46px;
  height: 46px;
  margin-bottom: 24px;
  place-items: center;
  border: var(--line-thin) solid var(--color-line);
  background: var(--color-panel);
  color: var(--color-ink);
}

.platform-card-icon svg {
  width: 24px;
  height: 24px;
}

.platform-card h3 {
  margin-bottom: 8px;
  font-size: 20px;
}

.platform-card p {
  color: var(--color-ink-soft);
  font-size: 13px;
}

.platform-card .btn {
  width: 100%;
  margin-top: auto;
  padding-inline: 12px;
}

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

.article-card {
  position: relative;
  display: flex;
  min-height: 100%;
  flex-direction: column;
  border: var(--line-thin) solid var(--color-line);
  background: var(--color-canvas);
  padding: 24px;
  transition:
    border-color var(--motion-fast) ease,
    transform var(--motion-fast) ease;
}

.article-card::before {
  position: absolute;
  top: -1px;
  left: -1px;
  width: 46px;
  height: 5px;
  background: var(--color-accent);
  content: "";
}

.article-card:hover {
  border-color: var(--color-accent);
  transform: translateY(-3px);
}

.article-meta {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 8px;
  margin-bottom: 16px;
  color: var(--color-ink-soft);
  font-family: var(--font-mono);
  font-size: 11px;
}

.article-card h3 {
  font-size: 21px;
}

.article-card p {
  color: var(--color-ink-soft);
}

.article-card-link {
  margin-top: auto;
  color: var(--color-accent-deep);
  font-weight: 750;
}

.callout {
  position: relative;
  border: var(--line-thin) solid var(--color-line);
  border-left: 6px solid var(--color-accent);
  background: var(--color-panel);
  padding: 20px 22px 20px 54px;
  color: var(--color-ink-soft);
}

.callout::before {
  position: absolute;
  top: 20px;
  left: 20px;
  display: grid;
  width: 22px;
  height: 22px;
  place-items: center;
  background: var(--color-accent);
  color: var(--color-canvas);
  content: "i";
  font-family: var(--font-mono);
  font-size: 13px;
  font-weight: 800;
}

.callout-success {
  border-left-color: var(--color-success);
}

.callout-success::before {
  background: var(--color-success);
  content: "✓";
}

.callout-warning {
  border-left-color: var(--color-warning);
}

.callout-warning::before {
  background: var(--color-warning);
  content: "!";
}

.article-promo,
.end-promo {
  position: relative;
  display: grid;
  grid-template-columns: minmax(0, 1fr) auto;
  gap: 24px;
  align-items: center;
  overflow: clip;
  border: var(--line-thin) solid var(--color-ink);
  background: var(--color-ink);
  padding: clamp(28px, 5vw, 48px);
  color: var(--color-canvas);
}

.article-promo::before,
.end-promo::before {
  position: absolute;
  top: 0;
  bottom: 0;
  left: 0;
  width: 8px;
  background: var(--color-accent);
  content: "";
}

.article-promo h2,
.article-promo h3,
.article-promo strong,
.end-promo h2,
.end-promo h3,
.end-promo strong {
  color: var(--color-canvas);
}

.article-promo p,
.end-promo p {
  margin-bottom: 0;
  color: var(--color-panel-strong);
}

.article-promo .btn,
.end-promo .btn {
  border-color: var(--color-canvas);
  background: var(--color-canvas);
  color: var(--color-ink);
}

.feature-browser {
  display: grid;
  grid-template-columns: minmax(220px, .72fr) minmax(0, 2fr);
  border: var(--line-thin) solid var(--color-line);
}

.feature-index {
  border-right: var(--line-thin) solid var(--color-line);
  background: var(--color-panel);
}

.feature-index button {
  display: grid;
  width: 100%;
  min-height: 72px;
  grid-template-columns: 76px minmax(0, 1fr);
  align-items: center;
  border: 0;
  border-bottom: var(--line-thin) solid var(--color-line);
  background: transparent;
  padding: 0;
  text-align: left;
}

.feature-index button[aria-selected="true"] {
  box-shadow: inset 5px 0 0 var(--color-accent);
  background: var(--color-canvas);
}

.feature-number {
  align-self: stretch;
  display: grid;
  place-items: center;
  background: var(--color-accent);
  color: var(--color-canvas);
  font-family: var(--font-mono);
  font-size: 11px;
  font-weight: 700;
}

.feature-title {
  padding: 14px;
  color: var(--color-ink);
  font-weight: 750;
}

.feature-detail {
  min-height: 420px;
  padding: clamp(28px, 5vw, 58px);
}

.feature-detail-label {
  color: var(--color-accent);
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: .08em;
}

.feature-sketch {
  margin-top: 28px;
  border-top: var(--line-thin) dashed var(--color-line);
  padding-top: 24px;
}

.preview-section {
  padding-top: 88px;
  padding-bottom: 88px;
}

.preview-label {
  margin-bottom: 28px;
  border-bottom: var(--line-thin) solid var(--color-line);
  padding-bottom: 12px;
  color: var(--color-accent);
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: .1em;
}

.swatch-grid {
  display: grid;
  grid-template-columns: repeat(5, minmax(0, 1fr));
  border-top: var(--line-thin) solid var(--color-line);
  border-left: var(--line-thin) solid var(--color-line);
}

.swatch {
  border-right: var(--line-thin) solid var(--color-line);
  border-bottom: var(--line-thin) solid var(--color-line);
  background: var(--color-canvas);
}

.swatch-color {
  height: 94px;
  border-bottom: var(--line-thin) solid var(--color-line);
}

.swatch-info {
  padding: 12px;
  font-family: var(--font-mono);
  font-size: 11px;
}

.swatch-bg {
  background: var(--color-canvas);
}

.swatch-panel {
  background: var(--color-panel);
}

.swatch-panel-strong {
  background: var(--color-panel-strong);
}

.swatch-line {
  background: var(--color-line);
}

.swatch-accent {
  background: var(--color-accent);
}

.swatch-accent-deep {
  background: var(--color-accent-deep);
}

.swatch-ink {
  background: var(--color-ink);
}

.swatch-muted {
  background: var(--color-ink-soft);
}

.swatch-success {
  background: var(--color-success);
}

.swatch-warning {
  background: var(--color-warning);
}

.swatch-error {
  background: var(--color-error);
}

.button-demo {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
}

.flag-route-row {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
}

.flag-route {
  display: flex;
  align-items: center;
  gap: 8px;
  border: var(--line-thin) solid var(--color-line);
  background: var(--color-canvas);
  padding: 7px 10px;
  color: var(--color-ink);
  font-size: 12px;
  font-weight: 650;
}

.flag-route svg {
  width: 28px;
  height: 19px;
  flex: 0 0 auto;
}

@media (max-width: 980px) {
  .platform-grid {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }

  .swatch-grid {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }
}

@media (max-width: 800px) {
  .pricing-grid,
  .article-grid {
    grid-template-columns: 1fr;
  }

  .feature-browser {
    grid-template-columns: 1fr;
  }

  .feature-index {
    border-right: 0;
    border-bottom: var(--line-thin) solid var(--color-line);
  }

  .feature-detail {
    min-height: 0;
  }

  .article-promo,
  .end-promo {
    grid-template-columns: 1fr;
  }
}

@media (max-width: 640px) {
  .tab-list [role="tab"],
  [role="tablist"] [role="tab"] {
    padding-inline: 15px;
  }

  .toc-tabs a {
    min-height: 48px;
    padding-inline: 14px;
  }

  .toc-tabs a::after {
    right: 14px;
    left: 14px;
  }

  .plan-card {
    padding: 22px;
  }

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

  .platform-card {
    min-height: 200px;
  }

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

  .callout {
    padding: 52px 18px 18px;
  }

  .callout::before {
    top: 17px;
    left: 17px;
  }

  .feature-index button {
    grid-template-columns: 70px minmax(0, 1fr);
  }

  .network-table-wrap,
  .comparison-table-wrap,
  .table-scroll {
    width: 100%;
    max-width: 100%;
    overflow-x: auto;
  }

  .network-table,
  .comparison-table,
  .data-table {
    min-width: 660px;
  }

  .prose > .data-table {
    min-width: 0;
  }
}

@media (prefers-reduced-motion: reduce) {
  .article-card {
    transform: none !important;
  }
}