:root {
  color-scheme: light;
  --ink: #172033;
  --muted: #5d687a;
  --line: #d9e0e8;
  --surface: #ffffff;
  --canvas: #f4f7fa;
  --local: #7e22ce;
  --local-soft: #f3e8ff;
  --queensland: #c2410c;
  --queensland-soft: #fff1d6;
  --australia: #0f766e;
  --australia-soft: #e6f7f5;
  --international: #2563eb;
  --international-soft: #e8f1fb;
  --focus: #111827;
}

* {
  box-sizing: border-box;
}

[hidden] {
  display: none !important;
}

html {
  background: var(--canvas);
}

body {
  margin: 0;
  color: var(--ink);
  background:
    linear-gradient(180deg, #eef3f8 0, var(--canvas) 210px),
    var(--canvas);
  font-family:
    Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI",
    sans-serif;
}

button,
a {
  font: inherit;
}

button:focus-visible,
a:focus-visible,
.network-viewport:focus-visible {
  outline: 3px solid rgba(37, 99, 235, 0.35);
  outline-offset: 3px;
}

.page-header {
  display: flex;
  justify-content: space-between;
  gap: 32px;
  max-width: 1740px;
  margin: 0 auto;
  padding: 30px 32px 24px;
}

.eyebrow,
.short-title {
  margin: 0 0 6px;
  color: var(--local);
  font-size: 0.76rem;
  font-weight: 800;
  letter-spacing: 0.09em;
  text-transform: uppercase;
}

h1,
h2,
h3,
p {
  margin-top: 0;
}

h1 {
  max-width: 760px;
  margin-bottom: 10px;
  font-size: clamp(2rem, 3vw, 3rem);
  line-height: 1.04;
  letter-spacing: -0.035em;
}

.lede {
  max-width: 820px;
  margin-bottom: 0;
  color: var(--muted);
  font-size: 1.02rem;
  line-height: 1.55;
}

.ai-disclaimer {
  max-width: 820px;
  margin: 16px 0 0;
  padding: 11px 13px;
  border-left: 4px solid #c2410c;
  color: #6f3219;
  background: #fff4e8;
  font-size: 0.88rem;
  line-height: 1.45;
}

.legend {
  display: grid;
  grid-template-columns: repeat(2, max-content);
  align-self: end;
  gap: 8px 18px;
  padding-bottom: 3px;
  color: #3f4a5c;
  font-size: 0.82rem;
}

.concept-link {
  grid-column: 1 / -1;
  justify-self: end;
  margin-bottom: 5px;
  color: #1d4ed8;
  font-weight: 750;
  text-decoration-thickness: 2px;
  text-underline-offset: 3px;
}

.legend span {
  display: inline-flex;
  align-items: center;
  gap: 7px;
}

.swatch {
  display: inline-block;
  width: 10px;
  height: 10px;
  border-radius: 50%;
}

.swatch-local {
  background: var(--local);
}

.swatch-queensland {
  background: var(--queensland);
}

.swatch-australia {
  background: var(--australia);
}

.swatch-international {
  background: var(--international);
}

.explorer-layout {
  display: grid;
  grid-template-columns: minmax(0, 1fr) 390px;
  gap: 20px;
  max-width: 1740px;
  margin: 0 auto;
  padding: 0 32px 32px;
}

.network-section,
.detail-panel {
  border: 1px solid var(--line);
  background: var(--surface);
}

.network-section {
  min-width: 0;
}

.network-toolbar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 20px;
  padding: 16px 18px;
  border-bottom: 1px solid var(--line);
}

.network-toolbar h2 {
  margin-bottom: 3px;
  font-size: 1rem;
}

.network-toolbar p,
.network-help {
  margin-bottom: 0;
  color: var(--muted);
  font-size: 0.8rem;
}

.zoom-controls {
  display: inline-flex;
  flex: 0 0 auto;
  border: 1px solid #cbd4df;
  border-radius: 7px;
  overflow: hidden;
}

.zoom-controls button {
  min-width: 38px;
  min-height: 34px;
  border: 0;
  border-right: 1px solid #cbd4df;
  color: #334155;
  background: #fff;
  cursor: pointer;
}

.zoom-controls button:last-child {
  border-right: 0;
}

.zoom-controls button:hover {
  background: #f1f5f9;
}

.network-viewport {
  min-height: 590px;
  max-height: calc(100vh - 250px);
  overflow: auto;
  background:
    linear-gradient(#edf2f7 1px, transparent 1px),
    linear-gradient(90deg, #edf2f7 1px, transparent 1px),
    #fafcfe;
  background-size: 28px 28px;
  scrollbar-color: #bac5d2 #edf2f7;
}

.network-object {
  display: block;
  width: 1200px;
  margin: 0 auto;
  transition: width 150ms ease;
}

.network-object > svg {
  display: block;
  width: 100%;
  height: auto;
}

.network-help {
  padding: 11px 18px 13px;
  border-top: 1px solid var(--line);
}

.detail-panel {
  align-self: start;
  position: sticky;
  top: 16px;
  min-height: 590px;
  padding: 24px 24px 26px;
  box-shadow: 0 14px 40px rgba(32, 44, 66, 0.08);
}

.detail-heading {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  margin-bottom: 22px;
}

.layer-pill,
.summary-status {
  display: inline-flex;
  align-items: center;
  min-height: 27px;
  padding: 4px 9px;
  border-radius: 999px;
  font-size: 0.72rem;
  font-weight: 750;
}

.layer-pill[data-layer="THHS"] {
  color: var(--local);
  background: var(--local-soft);
}

.layer-pill[data-layer="Queensland"] {
  color: var(--queensland);
  background: var(--queensland-soft);
}

.layer-pill[data-layer="Australia"] {
  color: var(--australia);
  background: var(--australia-soft);
}

.layer-pill[data-layer="International"] {
  color: var(--international);
  background: var(--international-soft);
}

.summary-status {
  color: #356247;
  background: #e8f5ec;
}

.summary-status.is-missing {
  color: #84520e;
  background: #fff4d6;
}

.detail-panel h2 {
  margin-bottom: 10px;
  font-size: 1.48rem;
  line-height: 1.18;
  letter-spacing: -0.02em;
}

.authority {
  margin-bottom: 0;
  color: var(--muted);
  font-size: 0.92rem;
  line-height: 1.45;
}

.detail-rule {
  height: 1px;
  margin: 21px 0;
  background: var(--line);
}

.detail-panel h3 {
  margin-bottom: 13px;
  font-size: 0.92rem;
  letter-spacing: 0.01em;
}

.takeaway-list {
  display: grid;
  gap: 12px;
  margin: 0;
  padding-left: 19px;
}

.takeaway-list li,
.unavailable-message {
  color: #354154;
  font-size: 0.9rem;
  line-height: 1.5;
}

.takeaway-list li::marker {
  color: var(--australia);
}

.unavailable-message {
  padding: 14px 15px;
  border-left: 3px solid #d79a2b;
  background: #fff9e9;
}

.full-summary-link {
  display: inline-flex;
  margin-top: 22px;
  color: #1d4ed8;
  font-size: 0.9rem;
  font-weight: 750;
  text-decoration-thickness: 2px;
  text-underline-offset: 3px;
}

@media (max-width: 1120px) {
  .page-header {
    align-items: flex-start;
    flex-direction: column;
  }

  .legend {
    align-self: auto;
  }

  .explorer-layout {
    grid-template-columns: minmax(0, 1fr);
  }

  .detail-panel {
    position: static;
    min-height: 0;
  }

  .network-viewport {
    max-height: 680px;
  }
}

@media (max-width: 680px) {
  .page-header,
  .explorer-layout {
    padding-right: 16px;
    padding-left: 16px;
  }

  .page-header {
    padding-top: 22px;
  }

  .legend {
    grid-template-columns: repeat(2, minmax(0, 1fr));
    width: 100%;
  }

  .network-toolbar {
    align-items: flex-start;
    flex-direction: column;
  }

  .network-viewport {
    min-height: 470px;
  }

  .detail-panel {
    padding: 20px 18px 22px;
  }
}

@media (prefers-reduced-motion: reduce) {
  .network-object {
    transition: none;
  }
}