:root {
  --component-line: rgba(0, 71, 171, .16);
  --component-route-glow: rgba(255, 255, 255, .3);
  --component-fab-shadow: rgba(18, 23, 33, .16);
}

.chip-row,
.badge-row {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 8px;
}

.chip,
.badge {
  display: inline-flex;
  max-width: 100%;
  min-height: 28px;
  align-items: center;
  gap: 7px;
  padding: 4px 10px;
  overflow: hidden;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-pill);
  background: var(--color-bg);
  color: var(--color-muted);
  font-family: var(--font-mono);
  font-size: .73rem;
  line-height: 1.35;
}

.badge::before {
  width: 7px;
  height: 7px;
  flex-shrink: 0;
  border-radius: 50%;
  background: currentColor;
  content: "";
}

.badge--primary {
  border-color: var(--color-accent-line);
  background: var(--color-accent-wash);
  color: var(--color-accent);
}

.badge--recommended {
  border-color: var(--color-success);
  background: var(--color-success-wash);
  color: var(--color-success);
}

.badge--warning {
  border-color: var(--color-warning);
  background: var(--color-warning-wash);
  color: var(--color-warning);
}

.badge--retired {
  border-color: var(--color-error);
  background: var(--color-error-wash);
  color: var(--color-error);
}

.tab-shell {
  overflow: hidden;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-m);
  background: var(--color-bg);
}

.tab-list {
  display: flex;
  min-width: 0;
  overflow-x: auto;
  border-bottom: 1px solid var(--color-border);
  background: var(--color-panel);
  scrollbar-width: thin;
}

.tab-list [role="tab"] {
  position: relative;
  min-width: max-content;
  min-height: 48px;
  padding: 12px 20px;
  border-right: 1px solid var(--color-border);
  color: var(--color-muted);
  font-weight: 650;
}

.tab-list [role="tab"]:hover {
  color: var(--color-accent);
}

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

.tab-list [role="tab"][aria-selected="true"]::after,
.tab-list [role="tab"].is-active::after {
  position: absolute;
  right: 14px;
  bottom: -1px;
  left: 14px;
  height: 2px;
  background: var(--color-accent);
  content: "";
}

.tab-panel {
  padding: clamp(24px, 4vw, 44px);
}

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

.inspection-tabs {
  display: grid;
  grid-template-columns: minmax(210px, .72fr) minmax(0, 2fr);
  overflow: hidden;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-m);
  background: var(--color-bg);
}

.inspection-tabs .tab-list {
  display: flex;
  overflow: visible;
  border-right: 1px solid var(--color-border);
  border-bottom: 0;
  background: var(--color-panel);
  flex-direction: column;
}

.inspection-tabs .tab-list [role="tab"] {
  display: flex;
  width: 100%;
  min-width: 0;
  min-height: 60px;
  align-items: center;
  gap: 12px;
  padding: 14px 20px;
  border-right: 0;
  border-bottom: 1px solid var(--color-border);
  font-family: var(--font-mono);
  text-align: left;
}

.inspection-tabs .tab-list [role="tab"]::before {
  width: 10px;
  height: 10px;
  flex-shrink: 0;
  border: 1px solid var(--color-accent);
  border-radius: 50%;
  background: var(--color-bg);
  content: "";
}

.inspection-tabs .tab-list [role="tab"][aria-selected="true"]::before {
  background: var(--color-accent);
  box-shadow: inset 0 0 0 2px var(--color-bg);
}

.inspection-tabs .tab-list [role="tab"][aria-selected="true"]::after {
  top: 50%;
  right: -1px;
  bottom: auto;
  left: auto;
  width: 22px;
  height: 1px;
  background: var(--color-accent);
}

.inspection-visual {
  width: min(320px, 100%);
  margin-top: 28px;
  color: var(--color-accent);
}

.toc {
  position: sticky;
  z-index: 10;
  top: 12px;
  display: flex;
  max-width: 100%;
  margin-bottom: 40px;
  padding: 8px;
  overflow-x: auto;
  gap: 6px;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-m);
  background: var(--color-bg);
  scrollbar-width: thin;
}

.toc a {
  display: inline-flex;
  min-width: max-content;
  min-height: 40px;
  align-items: center;
  padding: 8px 13px;
  border-radius: var(--radius-s);
  color: var(--color-muted);
  font-size: .9rem;
}

.toc a:hover,
.toc a[aria-current="location"] {
  background: var(--color-accent-wash);
  color: var(--color-accent);
}

.faq-list {
  border-top: 1px solid var(--color-border);
}

.faq-item {
  border-bottom: 1px solid var(--color-border);
}

.faq-item summary {
  position: relative;
  display: flex;
  min-height: 64px;
  padding: 18px 48px 18px 0;
  align-items: center;
  font-weight: 700;
  list-style: none;
  cursor: pointer;
}

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

.faq-item summary::before,
.faq-item summary::after {
  position: absolute;
  top: 50%;
  right: 10px;
  width: 16px;
  height: 1px;
  background: var(--color-accent);
  content: "";
}

.faq-item summary::after {
  transform: rotate(90deg);
  transition: transform var(--transition-fast);
}

.faq-item[open] summary::after {
  transform: rotate(0);
}

.faq-answer {
  max-width: 840px;
  padding: 0 48px 22px 0;
  color: var(--color-muted);
}

.glossary-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  border-top: 1px solid var(--color-border);
  border-left: 1px solid var(--color-border);
}

.term-card {
  min-width: 0;
  padding: 26px;
  border-right: 1px solid var(--color-border);
  border-bottom: 1px solid var(--color-border);
  background: var(--color-bg);
}

.term-card dt {
  margin-bottom: 8px;
  color: var(--color-accent);
  font-family: var(--font-mono);
  font-weight: 700;
}

.term-card dd {
  margin: 0;
  color: var(--color-muted);
}

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

.download-card {
  position: relative;
  display: flex;
  min-width: 0;
  padding: clamp(22px, 3vw, 32px);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-m);
  background: var(--color-bg);
  flex-direction: column;
}

.download-card.is-featured {
  border-color: var(--color-accent);
  box-shadow: inset 4px 0 0 var(--color-accent);
}

.download-card.is-retired {
  background: var(--color-panel);
}

.download-card-head {
  display: flex;
  margin-bottom: 20px;
  align-items: flex-start;
  justify-content: space-between;
  gap: 18px;
}

.download-card-title {
  display: flex;
  min-width: 0;
  align-items: center;
  gap: 14px;
}

.app-logo {
  width: 52px;
  height: 52px;
}

.download-actions {
  display: flex;
  margin-top: auto;
  padding-top: 24px;
  flex-wrap: wrap;
  gap: 10px;
}

.article-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  border-top: 1px solid var(--color-border);
  border-left: 1px solid var(--color-border);
}

.article-card {
  display: flex;
  min-width: 0;
  min-height: 290px;
  padding: clamp(24px, 4vw, 38px);
  border-right: 1px solid var(--color-border);
  border-bottom: 1px solid var(--color-border);
  background: var(--color-bg);
  flex-direction: column;
  transition: background var(--transition-fast);
}

.article-card:hover {
  background: var(--color-panel);
}

.article-card-meta {
  display: flex;
  margin-bottom: 22px;
  align-items: center;
  flex-wrap: wrap;
  gap: 10px;
  color: var(--color-muted);
  font-family: var(--font-mono);
  font-size: .75rem;
}

.article-card h3 {
  font-size: clamp(20px, 2.4vw, 27px);
}

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

.article-card-link {
  margin-top: auto;
  padding-top: 22px;
  color: var(--color-accent);
  font-weight: 700;
}

.callout {
  position: relative;
  margin-block: 28px;
  padding: 20px 22px 20px 28px;
  border: 1px solid var(--color-border);
  border-left: 4px solid var(--color-accent);
  border-radius: var(--radius-s);
  background: var(--color-panel);
}

.callout::before {
  position: absolute;
  top: 24px;
  left: 11px;
  width: 5px;
  height: 5px;
  border-radius: 50%;
  background: var(--color-accent);
  content: "";
}

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

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

.callout--error {
  border-left-color: var(--color-error);
  background: var(--color-error-wash);
}

.callout-title {
  margin-bottom: 6px;
  font-weight: 750;
}

.dl-fab {
  position: fixed;
  z-index: 80;
  right: max(18px, env(safe-area-inset-right));
  bottom: max(18px, env(safe-area-inset-bottom));
  display: inline-flex;
  max-width: calc(100vw - 36px);
  min-height: 52px;
  align-items: center;
  gap: 12px;
  padding: 9px 16px 9px 10px;
  border: 1px solid var(--color-accent);
  border-radius: var(--radius-m);
  background: var(--color-bg);
  box-shadow: 0 10px 28px var(--component-fab-shadow);
  color: var(--color-accent);
  font-weight: 750;
}

.dl-fab:hover {
  background: var(--color-accent);
  color: var(--color-on-accent);
}

.dl-fab-icon {
  display: inline-flex;
  width: 34px;
  height: 34px;
  flex-shrink: 0;
  align-items: center;
  justify-content: center;
  border-radius: var(--radius-s);
  background: var(--color-accent);
  color: var(--color-on-accent);
}

.dl-fab:hover .dl-fab-icon {
  background: var(--color-on-accent);
  color: var(--color-accent);
}

.article-download {
  display: grid;
  grid-template-columns: 1fr auto;
  margin-top: 52px;
  padding: clamp(22px, 4vw, 36px);
  align-items: center;
  gap: 24px;
  border: 1px solid var(--color-accent);
  border-radius: var(--radius-m);
  background: var(--color-accent-wash);
}

.hero {
  position: relative;
  height: calc(100vh - 120px);
  min-height: 700px;
  margin: 16px 16px 0;
  overflow: hidden;
  overflow-x: clip;
  border-radius: var(--radius-l);
  background-color: var(--color-accent);
  background-image:
    radial-gradient(88% 70% at 50% 28%, var(--color-hero-core), transparent 62%),
    radial-gradient(150% 128% at 50% 36%, transparent 50%, var(--color-hero-vignette) 100%);
  color: var(--color-on-accent);
}

.hero::before {
  position: absolute;
  inset: 0;
  background: linear-gradient(180deg, var(--color-on-accent-tint), transparent 16%);
  content: "";
  pointer-events: none;
}

.hero-weave {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  opacity: .05;
  pointer-events: none;
}

.hero-weave circle {
  fill: var(--color-on-accent);
}

.hero-in {
  position: relative;
  z-index: 1;
  display: flex;
  width: 100%;
  max-width: var(--wrap);
  height: 100%;
  margin-inline: auto;
  padding: 36px 32px 40px;
  align-items: center;
  justify-content: center;
  flex-direction: column;
}

.hero .chip-row {
  margin-bottom: 16px;
  justify-content: center;
}

.hero .chip {
  border-color: var(--color-on-accent-hair);
  background: transparent;
  color: var(--color-on-accent-soft);
}

.hero h1 {
  margin-bottom: 0;
  color: var(--color-on-accent);
  font-size: clamp(34px, 4.4vw, 48px);
  text-align: center;
}

.hero-highlight {
  box-shadow: inset 0 -.28em var(--color-highlight-band);
}

.hero-sub {
  max-width: 720px;
  margin: 14px auto 0;
  color: var(--color-on-accent-soft);
  font-size: 16px;
  line-height: 1.72;
  text-align: center;
}

.hero-sub strong {
  color: var(--color-on-accent);
  font-weight: 650;
}

.hero-actions {
  display: flex;
  margin-top: 26px;
  align-items: center;
  justify-content: center;
  flex-wrap: wrap;
  gap: 16px;
}

.hero .btn--light {
  padding: 14px 34px;
  border-color: var(--color-on-accent);
  border-radius: var(--radius-m);
  background: var(--color-on-accent);
  box-shadow: 0 10px 26px var(--color-button-shadow);
  color: var(--color-accent);
  font-size: 16.5px;
}

.hero .btn--light:hover {
  color: var(--color-accent-dark);
}

.hero .btn--hero-ghost {
  border-color: var(--color-on-accent-line);
  border-radius: var(--radius-m);
  color: var(--color-on-accent-soft);
}

.hero .btn--hero-ghost:hover {
  border-color: var(--color-on-accent-faint);
  background: var(--color-on-accent-tint);
  color: var(--color-on-accent);
}

.hero-net {
  display: flex;
  width: 100%;
  margin-top: 42px;
  align-items: stretch;
  gap: 24px;
}

.topology-wrap {
  min-width: 0;
  flex: 1 1 auto;
}

.topology-svg {
  width: 100%;
  height: auto;
}

.topology-edge,
.topology-stub {
  fill: none;
  stroke: var(--color-on-accent-line);
  stroke-width: 1;
}

.topology-dash {
  stroke-dasharray: 3 5;
}

.topology-node {
  fill: none;
  stroke: var(--color-on-accent);
  stroke-width: 1.25;
}

.topology-node-lit,
.topology-dot {
  fill: var(--color-on-accent);
  stroke: var(--color-on-accent);
}

.topology-route,
.topology-route-glow {
  fill: none;
  stroke: var(--color-on-accent);
  stroke-linecap: round;
  stroke-linejoin: round;
}

.topology-route {
  stroke-width: 3;
}

.topology-route-glow {
  opacity: .3;
  stroke-width: 8;
}

.topology-label {
  fill: var(--color-on-accent-soft);
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: .03em;
  text-anchor: middle;
}

.platform-column {
  display: flex;
  width: 190px;
  padding-block: 2px;
  flex: none;
  justify-content: space-between;
  flex-direction: column;
}

.platform-column a {
  position: relative;
  display: flex;
  padding: 7px 12px;
  align-items: center;
  gap: 10px;
  border: 1px solid var(--color-on-accent-hair);
  border-radius: var(--radius-m);
  color: var(--color-on-accent);
  font-size: 14.5px;
  font-weight: 650;
}

.platform-column a::before {
  position: absolute;
  top: 50%;
  left: -24px;
  width: 24px;
  height: 1px;
  background: var(--color-on-accent-line);
  content: "";
}

.platform-column a:hover {
  border-color: var(--color-on-accent-faint);
  background: var(--color-on-accent-tint);
}

.platform-icon {
  display: flex;
  width: 30px;
  height: 30px;
  align-items: center;
  justify-content: center;
  border: 1px solid var(--color-on-accent-hair);
  border-radius: 50%;
}

.platform-icon svg {
  width: 15px;
  height: 15px;
}

.palette-grid {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 12px;
}

.swatch {
  overflow: hidden;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-m);
  background: var(--color-bg);
}

.swatch-color {
  height: 86px;
  border-bottom: 1px solid var(--color-border);
}

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

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

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

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

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

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

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

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

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

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

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

.swatch-label {
  padding: 12px;
  font-family: var(--font-mono);
  font-size: .75rem;
  overflow-wrap: anywhere;
}

.type-sample {
  padding-block: 24px;
  border-bottom: 1px solid var(--color-border);
}

.type-sample:last-child {
  border-bottom: 0;
}

.type-label {
  margin-bottom: 8px;
  color: var(--color-accent);
  font-family: var(--font-mono);
  font-size: .75rem;
}

.preview-footer {
  border-top: 1px solid var(--color-border);
  background: var(--color-panel);
}

@media (max-width: 900px) {
  .inspection-tabs {
    grid-template-columns: 1fr;
  }

  .inspection-tabs .tab-list {
    overflow-x: auto;
    border-right: 0;
    border-bottom: 1px solid var(--color-border);
    flex-direction: row;
  }

  .inspection-tabs .tab-list [role="tab"] {
    width: auto;
    min-width: max-content;
    border-right: 1px solid var(--color-border);
    border-bottom: 0;
  }

  .inspection-tabs .tab-list [role="tab"][aria-selected="true"]::after {
    top: auto;
    right: 14px;
    bottom: -1px;
    left: 14px;
    width: auto;
    height: 2px;
  }

  .hero {
    height: auto;
    min-height: 0;
  }

  .hero-in {
    min-height: 760px;
  }

  .hero-net {
    flex-direction: column;
    gap: 22px;
  }

  .platform-column {
    width: 100%;
    flex-direction: row;
    flex-wrap: wrap;
    justify-content: center;
    gap: 12px;
  }

  .platform-column a::before {
    display: none;
  }

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

@media (max-width: 700px) {
  .download-grid,
  .article-grid,
  .glossary-grid {
    grid-template-columns: 1fr;
  }

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

@media (max-width: 640px) {
  .chip-row,
  .badge-row {
    flex-direction: row;
    justify-content: center;
  }

  .hero {
    margin: 8px 8px 0;
    border-radius: var(--radius-m);
  }

  .hero-in {
    min-height: 690px;
    padding: 30px 16px;
  }

  .hero h1 {
    font-size: clamp(24px, 7.4vw, 30px);
  }

  .hero-actions {
    width: 100%;
  }

  .hero-actions .btn {
    width: 100%;
  }

  .hero-net {
    margin-top: 30px;
  }

  .topology-svg {
    min-width: 650px;
  }

  .topology-wrap {
    overflow-x: auto;
    -webkit-overflow-scrolling: touch;
  }

  .platform-column a {
    flex: 1 1 calc(50% - 12px);
    justify-content: center;
  }

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

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