:root {
  color-scheme: dark;
  --bg: #050505;
  --panel: #111111;
  --panel-soft: #171717;
  --text: #f4f1ea;
  --muted: #b6b1a8;
  --dim: #7b766e;
  --line: rgba(244, 241, 234, 0.14);
  --line-strong: rgba(244, 241, 234, 0.28);
  --focus: #ffffff;
  --shadow: rgba(0, 0, 0, 0.5);
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  min-height: 100vh;
  background:
    radial-gradient(circle at 74% 20%, rgba(255, 255, 255, 0.055), transparent 34rem),
    linear-gradient(135deg, #050505 0%, #101010 55%, #050505 100%);
  color: var(--text);
  font-family:
    Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
}

a {
  color: inherit;
}

.hero,
.layout,
footer,
.doc-page {
  width: min(1680px, calc(100vw - 24px));
  margin: 0 auto;
}

.hero {
  display: grid;
  grid-template-columns: minmax(0, 1fr) auto;
  gap: 1rem;
  align-items: center;
  padding: 10px 0 8px;
}

.hero.compact {
  padding-top: 10px;
}

.eyebrow {
  margin: 0 0 0.22rem;
  color: var(--muted);
  font-size: 0.66rem;
  font-weight: 700;
  letter-spacing: 0.16em;
  text-transform: uppercase;
}

h1,
h2 {
  margin: 0;
}

h1 {
  max-width: 720px;
  font-family: Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  font-size: clamp(1.45rem, 2vw, 2.05rem);
  font-weight: 850;
  letter-spacing: -0.045em;
  line-height: 1;
}

h2 {
  font-family: Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  font-size: clamp(1.18rem, 1.4vw, 1.45rem);
  font-weight: 820;
  letter-spacing: -0.035em;
  line-height: 1.08;
}

.lede {
  max-width: 720px;
  margin: 0.28rem 0 0;
  color: var(--muted);
  font-size: clamp(0.82rem, 1vw, 0.94rem);
  line-height: 1.25;
}

.actions {
  display: flex;
  gap: 0.55rem;
  flex-wrap: wrap;
  justify-content: end;
}

.mobile-label,
.mobile-hint {
  display: none;
}

.actions a,
.details-actions a,
button,
select {
  border: 1px solid var(--line-strong);
  border-radius: 999px;
  background: rgba(255, 255, 255, 0.028);
  color: var(--text);
  font-size: 0.82rem;
  font-weight: 700;
  line-height: 1;
}

.actions a,
.details-actions a {
  padding: 0.7rem 0.84rem;
  text-decoration: none;
}

button,
select {
  cursor: pointer;
  padding: 0.64rem 0.78rem;
}

select {
  width: 100%;
  appearance: none;
}

.actions a:hover,
.details-actions a:hover,
button:hover,
select:hover {
  background: rgba(255, 255, 255, 0.1);
}

.layout {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 0.75rem;
  align-items: stretch;
}

.layout.wide-map {
  min-height: calc(100vh - 112px);
}

.map-card,
.concept-card,
.doc-card {
  border: 1px solid var(--line);
  border-radius: 24px;
  background: rgba(12, 12, 12, 0.78);
  box-shadow: 0 24px 80px var(--shadow);
  backdrop-filter: blur(18px);
}

.map-card {
  position: relative;
  min-height: calc(100vh - 112px);
  overflow: hidden;
}

.toolbar {
  display: grid;
  grid-template-columns: auto minmax(180px, 1fr) auto;
  gap: 0.55rem;
  align-items: center;
  padding: 0.56rem 0.62rem;
  border-bottom: 1px solid rgba(244, 241, 234, 0.1);
  background: rgba(255, 255, 255, 0.012);
}

.toolbar.advanced {
  grid-template-columns: minmax(280px, 1.35fr) minmax(140px, 0.5fr) minmax(120px, 0.42fr) auto;
  align-items: end;
}

.control {
  display: grid;
  gap: 0.24rem;
}

.filter-control {
  opacity: 0.88;
}

.button-group {
  display: flex;
  gap: 0.4rem;
  flex-wrap: wrap;
  justify-content: end;
}

.search-label {
  color: var(--muted);
  font-size: 0.66rem;
  font-weight: 800;
  letter-spacing: 0.04em;
}

input[type="search"] {
  width: 100%;
  border: 1px solid var(--line);
  border-radius: 999px;
  background: rgba(255, 255, 255, 0.042);
  color: var(--text);
  padding: 0.64rem 0.78rem;
  outline: none;
}

input[type="search"]::placeholder {
  color: var(--dim);
}

input[type="search"]:focus,
select:focus,
button:focus-visible,
a:focus-visible {
  border-color: rgba(255, 255, 255, 0.58);
  outline: 2px solid rgba(255, 255, 255, 0.2);
  outline-offset: 2px;
}

.map-wrap {
  height: 560px;
  overflow: hidden;
}

.map-wrap.large {
  height: calc(100vh - 192px);
  min-height: 720px;
}

#map {
  display: block;
  width: 100%;
  height: 100%;
  cursor: grab;
  touch-action: none;
  user-select: none;
}

#map:active {
  cursor: grabbing;
}

.hint {
  margin: 0;
  padding: 0 0.82rem 0.7rem;
  color: var(--dim);
  font-size: 0.8rem;
}

.concept-card {
  position: absolute;
  right: 1rem;
  bottom: 2.35rem;
  z-index: 4;
  width: min(460px, calc(100% - 2rem));
  max-height: min(455px, calc(100% - 6.4rem));
  overflow: auto;
  padding: 1rem;
  border-color: rgba(244, 241, 234, 0.22);
  background:
    linear-gradient(180deg, rgba(22, 22, 22, 0.96), rgba(8, 8, 8, 0.92)),
    rgba(10, 10, 10, 0.92);
  box-shadow: 0 26px 90px rgba(0, 0, 0, 0.68);
}

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

.concept-card-header {
  display: flex;
  justify-content: space-between;
  align-items: start;
  gap: 1rem;
}

.icon-button {
  border-color: var(--line);
  min-height: 32px;
  padding: 0.36rem 0.56rem;
  color: var(--muted);
  font-size: 0.72rem;
}

.concept-card .eyebrow {
  margin-bottom: 0.46rem;
}

.concept-card dl {
  margin: 0.9rem 0;
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 0.52rem;
}

.concept-card dl div {
  min-width: 0;
  padding: 0.58rem 0.62rem;
  border: 1px solid rgba(244, 241, 234, 0.12);
  border-radius: 14px;
  background: rgba(255, 255, 255, 0.035);
}

dt {
  color: var(--dim);
  font-size: 0.62rem;
  font-weight: 800;
  letter-spacing: 0.11em;
  text-transform: uppercase;
}

dd {
  margin: 0.22rem 0 0;
  color: var(--text);
  font-size: 0.84rem;
}

.description {
  color: var(--muted);
  line-height: 1.5;
  font-size: 0.91rem;
}

.feedback-prompt {
  margin: 0.72rem 0 0;
  color: var(--dim);
  font-size: 0.78rem;
  line-height: 1.35;
}

.details-actions {
  margin-top: 1rem;
}

.details-actions.stacked {
  display: grid;
  gap: 0.55rem;
}

.concept-card .details-actions a,
.concept-card .details-actions button {
  display: inline-flex;
  justify-content: center;
  align-items: center;
  min-height: 40px;
  text-align: center;
}

footer {
  padding: 10px 0 18px;
  color: var(--dim);
  font-size: 0.82rem;
  line-height: 1.4;
}

.site-footer {
  display: flex;
  justify-content: space-between;
  gap: 1rem;
  align-items: center;
  border-top: 1px solid rgba(244, 241, 234, 0.08);
}

.site-footer p {
  margin: 0;
}

.footer-links {
  display: flex;
  gap: 0.7rem;
  flex-wrap: wrap;
  justify-content: end;
}

.footer-links a {
  color: var(--muted);
  text-decoration-color: rgba(244, 241, 234, 0.24);
  text-underline-offset: 0.2em;
}

.footer-links a:hover {
  color: var(--text);
}

.link {
  stroke: var(--line-strong);
  stroke-width: 1.3;
}

.node circle {
  cursor: pointer;
  stroke: rgba(255, 255, 255, 0.58);
  stroke-width: 1.1;
}

.node.level-0 circle {
  fill: #f4f1ea;
  filter: drop-shadow(0 0 16px rgba(255, 255, 255, 0.5));
}

.node.level-1 circle {
  fill: #bdb8ae;
}

.node.level-2 circle {
  fill: #56524c;
}

.node.dimmed {
  opacity: 0.16;
}

.node.selected circle {
  stroke: var(--focus);
  stroke-width: 3;
}

.node.matched circle {
  filter: drop-shadow(0 0 14px rgba(255, 255, 255, 0.72));
  stroke: var(--focus);
  stroke-width: 3;
}

.node text {
  cursor: pointer;
  pointer-events: auto;
  fill: var(--text);
  paint-order: stroke;
  stroke: #050505;
  stroke-width: 4px;
  stroke-linejoin: round;
  font-size: 0.72rem;
  font-weight: 650;
}

.node.level-2 text {
  fill: var(--muted);
  font-size: 0.62rem;
  font-weight: 600;
}

.doc-page {
  padding: 32px 0 32px;
}

.doc-card {
  max-width: 900px;
  margin: 24px auto 0;
  padding: clamp(1.3rem, 3vw, 2.4rem);
  color: var(--muted);
  line-height: 1.65;
}

.doc-card h1,
.doc-card h2,
.doc-card h3 {
  color: var(--text);
  letter-spacing: -0.035em;
}

.doc-card h1 {
  font-family: Georgia, "Times New Roman", serif;
  font-size: clamp(2.4rem, 5vw, 4rem);
}

.doc-card h2 {
  margin-top: 2rem;
  font-family: Georgia, "Times New Roman", serif;
  font-size: clamp(1.6rem, 3vw, 2.4rem);
}

.doc-card h3 {
  margin-top: 1.5rem;
  font-size: 1.3rem;
}

.doc-card code,
.doc-card pre {
  background: rgba(255, 255, 255, 0.08);
  border-radius: 10px;
}

.doc-card code {
  padding: 0.12rem 0.32rem;
}

.doc-card pre {
  overflow: auto;
  padding: 1rem;
}

.doc-card a {
  color: var(--text);
  text-decoration-color: var(--line-strong);
}

.use-cases-page {
  padding-top: 12px;
}

.use-section {
  margin-top: 16px;
}

.use-section:first-child {
  margin-top: 0;
}

.use-section h3 {
  margin: 0 0 0.5rem;
  color: var(--text);
  font-size: 1rem;
  letter-spacing: -0.02em;
}

.use-section p,
.use-section li {
  line-height: 1.55;
}

.use-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 0.85rem;
  margin-top: 1.1rem;
}

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

.use-grid article,
.term-list div {
  min-width: 0;
  padding: 0.9rem;
  border: 1px solid rgba(244, 241, 234, 0.1);
  border-radius: 16px;
  background: rgba(255, 255, 255, 0.026);
}

.use-grid article > :last-child,
.use-section > :last-child,
.term-list div > :last-child {
  margin-bottom: 0;
}

.term-list {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 0.75rem;
  margin: 1.1rem 0 0;
}

.term-list dd {
  color: var(--muted);
  line-height: 1.5;
}

.caveat {
  color: var(--dim);
  font-size: 0.88rem;
}

.pair-list {
  columns: 2;
  column-gap: 2rem;
}

.limitation-block {
  border-color: rgba(255, 255, 255, 0.24);
  background: rgba(255, 255, 255, 0.052);
}

.feedback-section {
  display: grid;
  gap: 0.75rem;
}

.common-terms-page {
  max-width: 1120px;
}

.reuse-page {
  max-width: 1120px;
}

.attribution-examples {
  display: grid;
  gap: 0.75rem;
  margin-top: 1rem;
}

.attribution-example {
  min-width: 0;
  padding: 0.9rem;
  border: 1px solid rgba(244, 241, 234, 0.1);
  border-radius: 16px;
  background: rgba(0, 0, 0, 0.16);
}

.attribution-example h3 {
  margin: 0 0 0.4rem;
  color: var(--text);
  font-size: 0.98rem;
}

.attribution-example p {
  margin: 0;
  color: var(--muted);
}

.terms-grid {
  display: grid;
  gap: 0.9rem;
  margin-top: 1.1rem;
}

.term-card {
  padding: 1rem;
  border: 1px solid rgba(244, 241, 234, 0.1);
  border-radius: 16px;
  background: rgba(255, 255, 255, 0.026);
}

.term-card h3 {
  margin: 0 0 0.75rem;
  color: var(--text);
  font-size: 1.08rem;
  letter-spacing: -0.025em;
}

.term-card dl {
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(0, 1fr);
  gap: 0.75rem;
  margin: 0;
}

.term-card dl div {
  min-width: 0;
  padding: 0.72rem;
  border: 1px solid rgba(244, 241, 234, 0.08);
  border-radius: 13px;
  background: rgba(0, 0, 0, 0.16);
}

.term-card dd + dd {
  margin-top: 0.45rem;
}

.json-doc {
  max-width: 1180px;
}

.json-header {
  display: flex;
  justify-content: space-between;
  gap: 1rem;
  align-items: start;
  margin-bottom: 1rem;
}

.json-header h1 {
  margin-top: 0;
}

.raw-link {
  display: inline-flex;
  align-items: center;
  min-height: 38px;
  padding: 0.55rem 0.75rem;
  border: 1px solid var(--line-strong);
  border-radius: 999px;
  color: var(--text);
  text-decoration: none;
  white-space: nowrap;
}

.json-viewer {
  max-height: 74vh;
  margin: 0;
  border: 1px solid rgba(244, 241, 234, 0.12);
  background: rgba(0, 0, 0, 0.34) !important;
  color: var(--text);
  font-size: 0.82rem;
  line-height: 1.5;
  tab-size: 2;
}

.load-error {
  padding: 2rem;
  color: var(--muted);
}

@media (max-width: 1100px) {
  .toolbar.advanced {
    grid-template-columns: 1fr 1fr;
  }

  .button-group {
    justify-content: start;
  }
}

@media (max-width: 920px) {
  .hero {
    grid-template-columns: 1fr;
  }

  .actions {
    justify-content: start;
  }

  .map-card,
  .layout.wide-map {
    min-height: auto;
  }

  .map-wrap.large {
    height: 70vh;
    min-height: 500px;
  }

  .toolbar.advanced {
    grid-template-columns: 1fr;
  }

  .concept-card {
    right: 0.75rem;
    bottom: 2rem;
    width: auto;
    max-height: 56vh;
  }

  .concept-card dl {
    grid-template-columns: 1fr;
  }

  .site-footer {
    display: grid;
    justify-content: start;
  }

  .footer-links {
    justify-content: start;
  }
}

@media (max-width: 700px) {
  body {
    overflow-x: hidden;
  }

  .hero,
  .layout,
  footer,
  .doc-page {
    width: min(100vw - 14px, 1680px);
  }

  .hero {
    gap: 0.48rem;
    padding: 8px 0 6px;
  }

  .hero.compact {
    padding-top: 8px;
  }

  .eyebrow {
    margin-bottom: 0.16rem;
    font-size: 0.58rem;
    letter-spacing: 0.13em;
  }

  h1 {
    font-size: 1.25rem;
    letter-spacing: -0.04em;
  }

  h2 {
    font-size: 1.12rem;
  }

  .actions {
    flex-wrap: nowrap;
    justify-content: start;
    gap: 0.38rem;
    overflow-x: auto;
    padding: 0 0 0.2rem;
    margin-right: -0.35rem;
    scrollbar-width: none;
    -webkit-overflow-scrolling: touch;
  }

  .actions::-webkit-scrollbar {
    display: none;
  }

  .actions a {
    display: inline-flex;
    align-items: center;
    min-height: 38px;
    white-space: nowrap;
    padding: 0.52rem 0.66rem;
    font-size: 0.74rem;
  }

  .desktop-label,
  .desktop-hint {
    display: none;
  }

  .mobile-label,
  .mobile-hint {
    display: inline;
  }

  .map-card {
    border-radius: 18px;
  }

  .toolbar.advanced {
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 0.34rem;
    align-items: end;
    padding: 0.38rem;
  }

  .control {
    gap: 0.16rem;
  }

  .search-control,
  .button-group {
    grid-column: 1 / -1;
  }

  .search-label {
    font-size: 0.54rem;
  }

  input[type="search"],
  select,
  button {
    min-height: 38px;
    font-size: 0.74rem;
  }

  input[type="search"] {
    padding: 0.48rem 0.66rem;
  }

  select {
    padding: 0.48rem 0.64rem;
  }

  .button-group {
    display: grid;
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 0.28rem;
  }

  .button-group button {
    width: 100%;
    padding: 0.46rem 0.34rem;
  }

  .map-wrap.large {
    height: 62vh;
    height: 62dvh;
    min-height: 380px;
  }

  .hint {
    padding: 0.45rem 0.68rem 0.65rem;
    font-size: 0.74rem;
    line-height: 1.35;
  }

  .concept-card {
    position: fixed;
    left: 0;
    right: 0;
    bottom: 0;
    width: auto;
    max-height: 50vh;
    max-height: 50dvh;
    padding: 0.78rem 0.78rem max(0.82rem, env(safe-area-inset-bottom));
    border-right: 0;
    border-bottom: 0;
    border-left: 0;
    border-radius: 18px 18px 0 0;
    background:
      linear-gradient(180deg, rgba(18, 18, 18, 0.98), rgba(7, 7, 7, 0.96)),
      rgba(10, 10, 10, 0.96);
    box-shadow: 0 -18px 56px rgba(0, 0, 0, 0.62);
    z-index: 10;
  }

  .concept-card::before {
    content: "";
    display: block;
    width: 34px;
    height: 3px;
    margin: 0 auto 0.56rem;
    border-radius: 999px;
    background: rgba(244, 241, 234, 0.24);
  }

  .concept-card-header {
    align-items: center;
  }

  .icon-button {
    min-height: 38px;
    padding: 0.38rem 0.62rem;
    font-size: 0.68rem;
  }

  .concept-card .eyebrow {
    margin-bottom: 0.3rem;
    font-size: 0.56rem;
  }

  .concept-card h2 {
    font-size: 1rem;
    line-height: 1.06;
  }

  .concept-card dl {
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 0.34rem;
    margin: 0.55rem 0;
  }

  .concept-card dl div {
    padding: 0.38rem 0.42rem;
    border-radius: 11px;
  }

  .concept-card dt {
    font-size: 0.46rem;
    letter-spacing: 0.08em;
  }

  .concept-card dd {
    font-size: 0.66rem;
    line-height: 1.14;
  }

  .description {
    margin: 0.5rem 0 0;
    font-size: 0.78rem;
    line-height: 1.34;
  }

  .feedback-prompt {
    margin-top: 0.48rem;
    font-size: 0.68rem;
  }

  .details-actions.stacked {
    gap: 0.38rem;
  }

  .details-actions {
    margin-top: 0.68rem;
  }

  .details-actions a,
  .details-actions button {
    min-height: 38px;
    font-size: 0.74rem;
  }

  .node text {
    font-size: 0.66rem;
  }

  .node.level-2 text {
    font-size: 0.54rem;
  }

  .doc-page {
    padding-top: 14px;
  }

  .doc-card {
    margin-top: 12px;
  }

  .use-grid,
  .use-grid.compact,
  .term-list,
  .term-card dl {
    grid-template-columns: 1fr;
  }

  .pair-list {
    columns: 1;
  }

  .json-header {
    display: grid;
  }

  .json-viewer {
    max-height: 64vh;
    font-size: 0.68rem;
  }

  footer {
    padding: 8px 0 12px;
    font-size: 0.72rem;
  }

  .footer-links {
    gap: 0.55rem;
  }
}

@media (max-width: 420px) {
  .hero,
  .layout,
  footer,
  .doc-page {
    width: min(100vw - 10px, 1680px);
  }

  h1 {
    font-size: 1.15rem;
  }

  .toolbar.advanced {
    gap: 0.3rem;
    padding: 0.34rem;
  }

  .actions a {
    min-height: 36px;
    padding: 0.48rem 0.58rem;
  }

  .map-wrap.large {
    height: 58vh;
    height: 58dvh;
    min-height: 340px;
  }

  .concept-card {
    max-height: 48vh;
    max-height: 48dvh;
  }
}