.tab-shell {
  min-width: 0;
}

.tab-list {
  display: flex;
  max-width: 100%;
  padding: 6px;
  gap: 6px;
  overflow-x: auto;
  border-radius: var(--radius-control);
  background: var(--color-panel-muted);
  scrollbar-width: thin;
}

.tab-list[aria-orientation="vertical"] {
  padding: 0;
  overflow: visible;
  flex-direction: column;
  background: transparent;
}

.tab-button,
[role="tab"] {
  display: inline-flex;
  min-height: 46px;
  flex: 0 0 auto;
  align-items: center;
  justify-content: center;
  gap: 9px;
  padding: 10px 17px;
  border-radius: var(--radius-small);
  background: transparent;
  cursor: pointer;
  color: var(--color-text-muted);
  font-weight: 750;
  white-space: nowrap;
}

.tab-button:hover,
[role="tab"]:hover {
  color: var(--color-text);
}

.tab-button.is-active,
.tab-button[aria-selected="true"],
[role="tab"].is-active,
[role="tab"][aria-selected="true"] {
  background: var(--color-panel);
  box-shadow: var(--shadow-chip);
  color: var(--color-primary);
}

.tab-list[aria-orientation="vertical"] [role="tab"] {
  position: relative;
  width: 100%;
  min-height: 72px;
  justify-content: flex-start;
  padding: 14px 16px;
  text-align: left;
  white-space: normal;
  transition: transform var(--transition-fast), background var(--transition-fast);
}

.tab-list[aria-orientation="vertical"] [role="tab"][aria-selected="true"] {
  transform: translateX(10px);
}

.rule-tab-dot {
  width: 9px;
  height: 9px;
  flex-shrink: 0;
  border-radius: var(--radius-pill);
  background: var(--color-primary);
}

.rule-tab-dot.is-success {
  background: var(--color-success);
}

.rule-tab-dot.is-warning {
  background: var(--color-warning);
}

.rule-tab-copy {
  display: grid;
  gap: 2px;
}

.rule-tab-name {
  font-family: var(--font-mono);
  font-size: 0.78rem;
  font-weight: 700;
}

.rule-tab-summary {
  color: var(--color-text-muted);
  font-size: 0.79rem;
  font-weight: 500;
}

.tab-panel {
  min-width: 0;
  padding-top: 28px;
}

.tab-panel[hidden] {
  display: none;
}

.feature-console {
  display: grid;
  grid-template-columns: minmax(230px, 0.7fr) minmax(0, 1.3fr);
  gap: 42px;
  align-items: start;
}

.feature-detail {
  min-height: 430px;
  border-radius: var(--radius-window);
  background: var(--color-panel);
  box-shadow: var(--shadow-window);
  overflow: hidden;
}

.feature-detail-top {
  display: flex;
  padding: 14px 18px;
  align-items: center;
  gap: 7px;
  background: var(--color-panel-muted);
}

.feature-detail-body {
  padding: clamp(24px, 4vw, 44px);
}

.toc {
  position: sticky;
  top: calc(var(--header-height) + 18px);
  z-index: 10;
  display: flex;
  max-width: 100%;
  padding: 8px;
  gap: 6px;
  overflow-x: auto;
  border-radius: var(--radius-control);
  background: var(--color-panel);
  box-shadow: var(--shadow-chip);
  scrollbar-width: thin;
}

.toc a {
  display: inline-flex;
  min-height: 42px;
  flex: 0 0 auto;
  align-items: center;
  padding: 8px 14px;
  border-radius: var(--radius-small);
  color: var(--color-text-muted);
  font-size: 0.86rem;
  font-weight: 700;
  text-decoration: none;
  white-space: nowrap;
}

.toc a:hover,
.toc a.is-current {
  background: var(--color-primary-soft);
  color: var(--color-primary);
}

.faq-list {
  display: grid;
  gap: 12px;
}

.faq-item {
  border-radius: var(--radius-control);
  background: var(--color-panel);
  box-shadow: var(--shadow-chip);
}

.faq-item summary,
.faq-question {
  display: flex;
  width: 100%;
  min-height: 58px;
  padding: 17px 20px;
  align-items: center;
  justify-content: space-between;
  gap: 18px;
  cursor: pointer;
  color: var(--color-text);
  font-weight: 780;
  list-style: none;
}

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

.faq-item summary::after,
.faq-question::after {
  width: 26px;
  height: 26px;
  flex-shrink: 0;
  border-radius: var(--radius-pill);
  background: var(--color-panel-muted);
  color: var(--color-primary);
  content: "+";
  font-family: var(--font-mono);
  font-size: 1rem;
  line-height: 26px;
  text-align: center;
}

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

.faq-answer {
  padding: 0 20px 20px;
  color: var(--color-text-muted);
}

.glossary-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 18px;
}

.term-card {
  min-width: 0;
  padding: 24px;
  border-radius: var(--radius-card);
  background: var(--color-panel);
  box-shadow: var(--shadow-chip);
}

.term-name {
  margin-bottom: 9px;
  font-family: var(--font-mono);
  font-size: 1rem;
  font-weight: 750;
  overflow-wrap: anywhere;
}

.term-description {
  margin-bottom: 0;
  color: var(--color-text-muted);
  font-size: 0.92rem;
}

.download-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 20px;
}

.download-card {
  display: flex;
  min-width: 0;
  padding: 26px;
  border-radius: var(--radius-card);
  background: var(--color-panel);
  box-shadow: var(--shadow-card);
  flex-direction: column;
}

.download-card-head {
  display: flex;
  align-items: flex-start;
  gap: 16px;
}

.download-card-icon {
  width: 56px;
  height: 56px;
  flex-shrink: 0;
}

.download-card-title {
  margin-bottom: 4px;
  font-size: 1.35rem;
}

.download-card-version {
  color: var(--color-text-muted);
  font-family: var(--font-mono);
  font-size: 0.77rem;
  overflow-wrap: anywhere;
}

.download-card-actions {
  display: flex;
  margin-top: auto;
  padding-top: 20px;
  gap: 10px;
  flex-wrap: wrap;
}

.download-card-actions .btn {
  min-height: 46px;
  flex: 1 1 180px;
  padding-inline: 18px;
}

.app-badge {
  display: inline-flex;
  max-width: 100%;
  align-items: center;
  padding: 5px 10px;
  border-radius: var(--radius-pill);
  font-size: 0.72rem;
  font-weight: 800;
  line-height: 1.2;
}

.app-badge-featured {
  background: var(--color-primary-soft);
  color: var(--color-primary);
}

.app-badge-recommended {
  background: var(--color-success-soft);
  color: var(--color-success);
}

.app-badge-retired {
  background: var(--color-danger-soft);
  color: var(--color-danger);
}

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

.article-card {
  display: flex;
  min-width: 0;
  min-height: 300px;
  padding: 26px;
  border-radius: var(--radius-card);
  background: var(--color-panel);
  box-shadow: var(--shadow-card);
  color: var(--color-text);
  flex-direction: column;
  text-decoration: none;
  transition: transform var(--transition-fast), box-shadow var(--transition-fast);
}

.article-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-window);
  color: var(--color-text);
}

.article-card-meta {
  display: flex;
  margin-bottom: 18px;
  align-items: center;
  gap: 10px;
  flex-wrap: wrap;
  color: var(--color-text-muted);
  font-family: var(--font-mono);
  font-size: 0.72rem;
}

.article-card-title {
  margin-bottom: 14px;
  font-size: 1.25rem;
  line-height: 1.4;
}

.article-card-summary {
  margin-bottom: 22px;
  color: var(--color-text-muted);
  font-size: 0.9rem;
}

.article-card-more {
  margin-top: auto;
  color: var(--color-primary);
  font-weight: 750;
}

.callout {
  position: relative;
  margin: 1.5rem 0;
  padding: 20px 22px 20px 52px;
  overflow-x: clip;
  border-radius: var(--radius-control);
  background: var(--color-primary-soft);
  color: var(--color-primary-dark);
}

.callout::before {
  position: absolute;
  top: 20px;
  left: 20px;
  width: 17px;
  height: 17px;
  border-radius: var(--radius-pill);
  background: var(--color-primary);
  box-shadow: 0 0 0 6px var(--color-panel);
  content: "";
}

.callout-title {
  display: block;
  margin-bottom: 4px;
  font-weight: 800;
}

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

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

.callout-warning {
  background: var(--color-warning-soft);
  color: var(--color-text);
}

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

.download-guide-card {
  display: grid;
  margin-top: 3rem;
  padding: clamp(24px, 4vw, 38px);
  grid-template-columns: 1fr auto;
  gap: 24px;
  align-items: center;
  border-radius: var(--radius-window);
  background: var(--color-panel);
  box-shadow: var(--shadow-window);
}

.download-guide-card h2,
.download-guide-card h3 {
  margin-bottom: 8px;
}

.download-guide-card p {
  margin-bottom: 0;
  color: var(--color-text-muted);
}

.dl-fab {
  position: fixed;
  right: max(18px, env(safe-area-inset-right));
  bottom: max(18px, env(safe-area-inset-bottom));
  z-index: 80;
  display: inline-flex;
  max-width: calc(100vw - 36px);
  min-height: 54px;
  align-items: center;
  gap: 11px;
  padding: 9px 18px 9px 10px;
  border-radius: var(--radius-pill);
  background: var(--color-panel);
  box-shadow: var(--shadow-window);
  color: var(--color-text);
  font-weight: 780;
  text-decoration: none;
}

.dl-fab:hover {
  color: var(--color-primary);
  transform: translateY(-2px);
}

.dl-fab-icon {
  display: inline-flex;
  width: 36px;
  height: 36px;
  flex-shrink: 0;
  align-items: center;
  justify-content: center;
  border-radius: var(--radius-pill);
  background: var(--gradient-primary);
  color: var(--color-panel);
}

.dl-fab-icon svg {
  width: 18px;
  height: 18px;
  fill: none;
  stroke: currentColor;
  stroke-linecap: round;
  stroke-linejoin: round;
  stroke-width: 2;
}

.preview-palette {
  display: grid;
  grid-template-columns: repeat(5, minmax(0, 1fr));
  gap: 14px;
}

.swatch {
  min-width: 0;
  overflow: hidden;
  border-radius: var(--radius-control);
  background: var(--color-panel);
  box-shadow: var(--shadow-chip);
}

.swatch-color {
  height: 92px;
}

.swatch-info {
  padding: 13px;
}

.swatch-name {
  display: block;
  font-family: var(--font-mono);
  font-size: 0.72rem;
  overflow-wrap: anywhere;
}

.swatch-value {
  color: var(--color-text-muted);
  font-family: var(--font-mono);
  font-size: 0.68rem;
}

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

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

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

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

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

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

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

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

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

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

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

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

.component-demo-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 22px;
}

.hero-preview {
  position: relative;
  padding-top: 52px;
  padding-bottom: 64px;
  overflow-x: clip;
}

.hero-preview-grid {
  display: grid;
  grid-template-columns: minmax(0, 1.02fr) minmax(0, 0.98fr);
  gap: 56px;
  align-items: start;
}

.hero-preview-copy {
  padding-top: 26px;
}

.eyebrow-row,
.platform-row,
.badge-row,
.capsule-row {
  display: flex;
  align-items: center;
  gap: 10px;
  flex-wrap: wrap;
}

.eyebrow-row {
  margin-bottom: 26px;
}

.hero-preview-description {
  max-width: 34em;
  margin-bottom: 32px;
  color: var(--color-text-muted);
  font-size: 1.06rem;
  line-height: 1.75;
}

.hero-preview-description strong {
  color: var(--color-text);
}

.hero-preview .btn-row {
  margin-bottom: 26px;
}

.platform-chip {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 9px 16px;
  border-radius: 12px;
  background: var(--color-panel-muted);
  color: var(--color-text);
  font-size: 0.84rem;
  font-weight: 650;
  text-decoration: none;
  transition: background var(--transition-fast), transform var(--transition-fast);
}

.platform-chip:hover {
  transform: translateY(-1px);
  background: var(--color-primary-soft);
  color: var(--color-primary);
}

.platform-chip svg {
  width: 17px;
  height: 17px;
  flex-shrink: 0;
  fill: var(--color-text-muted);
}

.platform-chip .icon-hole {
  fill: var(--color-panel-muted);
}

.platform-chip .icon-stroke {
  fill: none;
  stroke: var(--color-text-muted);
  stroke-linecap: round;
  stroke-width: 1.6;
}

.platform-chip:hover svg {
  fill: var(--color-primary);
}

.platform-chip:hover .icon-hole {
  fill: var(--color-primary-soft);
}

.platform-chip:hover .icon-stroke {
  stroke: var(--color-primary);
}

.hero-device-stage {
  position: relative;
  padding-top: 88px;
}

.route-window {
  overflow: hidden;
  border-radius: var(--radius-window);
  background: var(--color-panel);
  box-shadow: var(--shadow-window);
}

.route-window-chrome {
  display: flex;
  padding: 14px 20px 12px;
  align-items: center;
  gap: 16px;
  background: var(--color-panel-muted);
}

.traffic-dots {
  display: flex;
  gap: 6px;
}

.traffic-dots i {
  width: 10px;
  height: 10px;
  flex-shrink: 0;
  border-radius: var(--radius-pill);
}

.traffic-red {
  background: var(--color-danger);
}

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

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

.route-tabs {
  display: flex;
  gap: 4px;
}

.route-tab {
  padding: 7px 16px;
  border-radius: var(--radius-small);
  color: var(--color-text-muted);
  font-size: 0.78rem;
  font-weight: 650;
}

.route-tab.is-current {
  display: flex;
  align-items: center;
  gap: 7px;
  background: var(--color-panel);
  box-shadow: var(--shadow-chip);
  color: var(--color-primary);
}

.route-tab.is-current i {
  width: 6px;
  height: 6px;
  flex-shrink: 0;
  border-radius: var(--radius-pill);
  background: var(--color-primary);
}

.route-topology {
  width: 100%;
  height: auto;
  padding: 10px 6px 4px;
}

.route-topology .gradient-start {
  stop-color: var(--color-primary);
}

.route-topology .gradient-end {
  stop-color: var(--color-primary-sky);
}

.route-topology .line-base,
.route-topology .line-flow {
  fill: none;
  stroke-linecap: round;
  stroke-linejoin: round;
  stroke-width: 3.5;
}

.route-topology .line-base {
  opacity: 0.28;
}

.route-topology .line-flow {
  stroke-dasharray: 5 13;
}

.route-topology .route-neutral {
  stroke: var(--color-line);
}

.route-topology .route-proxy {
  stroke: url("#previewProxyGradient");
}

.route-topology .route-direct {
  stroke: var(--color-success);
}

.route-topology .route-block {
  stroke: var(--color-warning);
}

.route-topology .flow-in {
  animation: route-flow 1.8s linear infinite;
}

.route-topology .flow-proxy {
  animation: route-flow 1.5s linear infinite;
}

.route-topology .flow-direct {
  animation: route-flow 2.1s linear infinite;
}

.route-topology .flow-block {
  animation: route-flow 2.7s linear infinite;
}

@keyframes route-flow {
  to {
    stroke-dashoffset: -18;
  }
}

.route-topology .entry-core,
.route-topology .entry-halo {
  transform-box: fill-box;
  transform-origin: center;
  fill: var(--color-primary);
  animation: route-breathe 3.2s ease-in-out infinite;
}

.route-topology .entry-halo {
  opacity: 0.14;
  animation-direction: reverse;
}

@keyframes route-breathe {
  0%,
  100% {
    transform: scale(1);
  }

  50% {
    transform: scale(1.28);
  }
}

.route-topology .node-diamond,
.route-topology .outbound-box {
  fill: var(--color-panel-muted);
}

.route-topology .route-chip {
  fill: var(--color-panel);
  filter: drop-shadow(0 2px 5px var(--color-shadow-medium));
}

.route-topology .topology-mono {
  fill: var(--color-text-muted);
  font-family: var(--font-mono);
  font-size: 11px;
}

.route-topology .topology-rule {
  fill: var(--color-primary);
  font-family: var(--font-mono);
  font-size: 12.5px;
  font-weight: 650;
}

.route-topology .topology-badge {
  fill: var(--color-text);
  font-family: var(--font-mono);
  font-size: 12.5px;
  font-weight: 650;
}

.route-topology .topology-chip-text {
  font-family: var(--font-body);
  font-size: 11.5px;
  font-weight: 750;
}

.route-topology .fill-proxy,
.route-topology .text-proxy {
  fill: var(--color-primary);
}

.route-topology .fill-direct,
.route-topology .text-direct {
  fill: var(--color-success);
}

.route-topology .fill-block,
.route-topology .text-block {
  fill: var(--color-warning);
}

.route-status {
  display: flex;
  padding: 11px 22px;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  background: var(--color-panel-muted);
}

.route-status-left {
  display: flex;
  align-items: center;
  gap: 9px;
}

.route-status-text {
  color: var(--color-text-muted);
  font-family: var(--font-mono);
  font-size: 0.68rem;
  overflow-wrap: anywhere;
}

.preview-footer {
  margin-top: var(--section-space);
}

@media (prefers-reduced-motion: reduce) {
  .route-topology .line-flow,
  .route-topology .entry-core,
  .route-topology .entry-halo {
    animation: none;
  }
}

@media (max-width: 1080px) {
  .hero-preview-grid {
    grid-template-columns: 1fr;
  }

  .hero-device-stage {
    padding-top: 12px;
  }

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

  .preview-palette {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }
}

@media (max-width: 820px) {
  .feature-console {
    grid-template-columns: 1fr;
  }

  .tab-list[aria-orientation="vertical"] {
    gap: 8px;
  }

  .tab-list[aria-orientation="vertical"] [role="tab"] {
    min-height: 62px;
  }

  .tab-list[aria-orientation="vertical"] [role="tab"][aria-selected="true"] {
    transform: none;
  }

  .download-grid,
  .glossary-grid,
  .component-demo-grid {
    grid-template-columns: 1fr;
  }

  .download-guide-card {
    grid-template-columns: 1fr;
  }
}

@media (max-width: 640px) {
  .hero-preview {
    padding-top: 26px;
    padding-bottom: 48px;
  }

  .hero-preview-grid {
    gap: 34px;
  }

  .hero-preview-copy {
    padding-top: 8px;
  }

  .eyebrow-row {
    margin-bottom: 20px;
  }

  .platform-row {
    justify-content: flex-start;
  }

  .platform-chip {
    padding: 8px 11px;
    font-size: 0.76rem;
  }

  .route-tabs {
    overflow-x: auto;
  }

  .route-tab {
    padding-inline: 10px;
    white-space: nowrap;
  }

  .route-status {
    align-items: flex-start;
    flex-direction: column;
  }

  .route-status > .route-status-text {
    display: none;
  }

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

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

  .dl-fab {
    right: 12px;
    bottom: 12px;
    max-width: calc(100vw - 24px);
  }

  .dl-fab-label {
    white-space: normal;
  }
}