body.worldmodel-page {
  height: 100vh;
  height: 100dvh;
  min-height: 100vh;
  min-height: 100dvh;
  overflow: hidden;
}

.worldmodel-page .page {
  width: 100%;
  max-width: none;
  height: 100vh;
  height: 100dvh;
  min-height: 0;
  padding: 28px 0 32px;
}

.worldmodel-page .masthead,
.worldmodel-page footer {
  flex: 0 0 auto;
  width: calc(100% - 40px);
  max-width: 1220px;
  margin-right: auto;
  margin-left: auto;
}

.worldmodel-page footer {
  position: relative;
  margin-top: 0;
  padding-top: 22px;
}

.worldmodel-header {
  position: relative;
}

.worldmodel-header-title {
  position: absolute;
  top: 50%;
  left: 50%;
  display: inline-flex;
  align-items: center;
  gap: 7px;
  border-bottom: 1px solid transparent;
  font-family: Georgia, "Times New Roman", serif;
  font-size: 1.34rem;
  transform: translate(-50%, -50%);
}

.worldmodel-header-title svg {
  width: 15px;
  height: 15px;
  fill: currentColor;
}

.worldmodel-header-title:hover {
  color: var(--blue);
  border-color: currentColor;
}

.worldmodel-main {
  display: flex;
  flex: 1 1 auto;
  flex-direction: column;
  min-width: 0;
  min-height: 0;
  padding: clamp(8px, 1.5vh, 16px) 0;
}

.knowledge-map {
  position: relative;
  flex: 1 1 auto;
  min-width: 0;
  min-height: 0;
  margin: 0;
  overflow: hidden;
}

.map-viewport {
  position: relative;
  width: 100%;
  height: 100%;
  min-width: 0;
  min-height: 0;
  overflow: hidden;
}

.map-viewport canvas {
  display: block;
  width: 100%;
  height: 100%;
  cursor: grab;
  touch-action: none;
}

.map-viewport canvas.is-dragging {
  cursor: grabbing;
}

.map-viewport canvas.is-hovering-node {
  cursor: crosshair;
}

.map-key {
  position: absolute;
  right: max(14px, calc((100vw - 1220px) / 2));
  bottom: 8px;
  z-index: 2;
  display: grid;
  width: 260px;
  max-width: calc(100vw - 20px);
  justify-items: end;
  gap: 8px;
  color: var(--muted);
  font-size: 0.72rem;
  line-height: 1.3;
  text-align: right;
  pointer-events: none;
}

.map-legend {
  display: grid;
  grid-template-columns: repeat(2, max-content);
  align-items: center;
  justify-content: end;
  column-gap: 13px;
  row-gap: 3px;
  font-size: 0.74rem;
}

.map-legend span {
  display: inline-flex;
  align-items: center;
  gap: 5px;
}

.map-legend i {
  display: inline-block;
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--map-note);
}

.map-legend .is-folder {
  width: 9px;
  height: 9px;
  background: var(--map-folder);
}

.map-legend .is-hierarchy-link,
.map-legend .is-note-link {
  width: 20px;
  height: 3px;
  border-radius: 999px;
}

.map-legend .is-hierarchy-link {
  background: var(--map-hierarchy);
}

.map-legend .is-note-link {
  background: var(--map-link);
}

.map-source-note {
  font-size: 0.68rem;
  font-style: italic;
  opacity: 0.72;
}

.map-source-note a {
  color: inherit;
  pointer-events: auto;
}

.map-source-note a:hover {
  color: var(--blue);
}

.map-loading {
  position: absolute;
  inset: 0;
  display: grid;
  place-content: center;
  justify-items: center;
  color: var(--muted);
  background: var(--soft-overlay);
  transition: opacity 420ms ease, visibility 420ms ease;
}

.map-loading span {
  width: 26px;
  height: 26px;
  border: 1px solid var(--spinner-border);
  border-top-color: var(--blue);
  border-radius: 50%;
  animation: map-spin 800ms linear infinite;
}

.knowledge-map.is-ready .map-loading,
.knowledge-map.has-error .map-loading {
  visibility: hidden;
  opacity: 0;
  pointer-events: none;
}

.map-tooltip {
  position: absolute;
  top: 0;
  left: 0;
  z-index: 2;
  display: grid;
  width: max-content;
  max-width: min(330px, calc(100% - 20px));
  gap: 2px;
  padding: 9px 11px;
  border: 1px solid var(--panel-border);
  border-radius: 6px;
  color: var(--ink);
  background: var(--panel);
  box-shadow: var(--panel-shadow);
  font-size: 0.82rem;
  line-height: 1.35;
  pointer-events: none;
}

.map-tooltip[hidden] {
  display: none;
}

.map-tooltip span,
.map-tooltip small {
  color: var(--muted);
}

.map-tooltip small {
  max-width: 300px;
  overflow: hidden;
  font-size: 0.7rem;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.worldmodel-caption {
  position: absolute;
  top: 22px;
  left: 50%;
  z-index: 2;
  display: block;
  width: min(620px, 46vw);
  color: var(--ink);
  font-family: "SFMono-Regular", Consolas, "Liberation Mono", Menlo, monospace;
  font-size: inherit;
  line-height: inherit;
  text-align: center;
  text-wrap: balance;
  overflow-wrap: anywhere;
  white-space: normal;
  transform: translateX(-50%);
  pointer-events: none;
  text-shadow: 0 1px 0 var(--readout-shadow);
}

.worldmodel-caption.has-status::before {
  color: #6a6b66;
  content: "> ";
}

.worldmodel-caption span {
  display: inline;
  white-space: normal;
}

@keyframes map-spin {
  to { transform: rotate(360deg); }
}

footer {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
  margin-top: 50px;
  padding-top: 22px;
  border-top: 1px solid var(--line);
  color: var(--muted);
  font-size: 0.92rem;
}

.footer-codex-link {
  text-decoration: underline;
  text-decoration-color: var(--line);
  text-underline-offset: 3px;
}

.footer-codex-link:hover {
  color: var(--ink);
  text-decoration-color: currentColor;
}

.footer-companions {
  position: absolute;
  top: 0;
  left: 50%;
  z-index: 2;
  display: grid;
  place-items: end center;
  width: 78px;
  height: 68px;
  padding: 0;
  border: 0;
  color: var(--ink);
  background: transparent;
  cursor: help;
  transform: translate(-50%, -100%);
  transform-origin: 50% 100%;
}

.footer-companions::after {
  position: absolute;
  right: 7px;
  bottom: 0;
  left: 7px;
  height: 2px;
  border-radius: 999px;
  background: currentColor;
  content: "";
  opacity: 0.9;
}

.footer-companions:hover,
.footer-companions:focus-visible {
  color: #11100e;
  transform: translate(-50%, -100%) translateY(-1px);
}

.footer-boy {
  position: relative;
  z-index: 1;
  display: block;
  width: 68px;
  height: auto;
  object-fit: contain;
  object-position: center bottom;
  opacity: 0.86;
}

.footer-companions:hover .footer-boy,
.footer-companions:focus-visible .footer-boy {
  opacity: 1;
}

.elsewhere {
  display: flex;
  gap: 16px;
  white-space: nowrap;
}

.elsewhere a {
  border-bottom: 1px solid transparent;
}

.elsewhere a:hover {
  color: var(--ink);
  border-color: currentColor;
}

body.meta-home {
  height: 100vh;
  height: 100dvh;
  min-height: 100vh;
  min-height: 100dvh;
  overflow: hidden;
}

.meta-home .page {
  width: 100%;
  max-width: none;
  height: 100vh;
  height: 100dvh;
  min-height: 0;
  padding: 28px 0 32px;
}

.meta-home .masthead,
.meta-home footer {
  flex: 0 0 auto;
  width: calc(100% - 40px);
  max-width: 1220px;
  margin-left: auto;
  margin-right: auto;
}

.meta-home main,
.meta-home .meta-main,
.meta-home .meta-stage,
.meta-home .cosmos-frame,
.meta-home .cosmos-shell {
  min-width: 0;
  min-height: 0;
}

.meta-home .meta-main {
  flex: 1 1 auto;
  align-items: stretch;
  width: 100%;
  overflow: hidden;
  padding: clamp(8px, 1.4vh, 18px) 0 clamp(6px, 1vh, 12px);
}

.meta-home .meta-stage,
.meta-home .cosmos-frame,
.meta-home .cosmos-shell,
.meta-home .worldmodel-diagram {
  height: 100%;
}

.meta-home .worldmodel-diagram {
  min-width: 0;
  min-height: 0;
  max-height: 100%;
}

.meta-home footer {
  position: relative;
  display: grid;
  grid-template-columns: minmax(0, 1fr) auto minmax(0, 1fr);
  align-items: center;
  margin-top: 0;
  padding-top: 22px;
}

.meta-home footer > span:first-child,
.worldmodel-page footer > span:first-child {
  grid-column: 1;
}

.meta-home footer .elsewhere,
.worldmodel-page footer .elsewhere {
  grid-column: 3;
  justify-self: end;
}

.worldmodel-page footer {
  display: grid;
  grid-template-columns: minmax(0, 1fr) auto minmax(0, 1fr);
  align-items: center;
}

:root[data-theme="night"] .ascii-map {
  color: rgba(232, 231, 224, 0.62);
}

:root[data-theme="night"] .ascii-cell {
  color: rgba(232, 231, 224, 0.14);
}

:where(:root[data-theme="night"]) .ascii-cell.is-universe {
  color: rgba(139, 157, 207, 0.38);
}

:where(:root[data-theme="night"]) .ascii-cell.is-universe.tone-sky-silver {
  color: rgba(165, 180, 199, 0.5);
}

:where(:root[data-theme="night"]) .ascii-cell.is-universe.tone-sky-blue,
:where(:root[data-theme="night"]) .ascii-cell.is-universe.tone-sky-star {
  color: rgba(111, 157, 232, 0.58);
}

:where(:root[data-theme="night"]) .ascii-cell.is-universe.tone-sky-gold {
  color: rgba(232, 175, 77, 0.68);
}

:where(:root[data-theme="night"]) .ascii-cell.is-universe.tone-sky-violet {
  color: rgba(169, 139, 225, 0.62);
}

:root[data-theme="night"] .ascii-cell.is-firework {
  color: #ffe082;
  font-weight: 700;
  opacity: 1;
}

:root[data-theme="night"] .ascii-cell.is-firework.tone-firework-gold {
  color: #ffe082;
  text-shadow:
    0 0 4px rgba(255, 224, 130, 0.92),
    0 0 12px rgba(255, 188, 66, 0.68),
    0 0 24px rgba(255, 149, 0, 0.38);
}

:root[data-theme="night"] .ascii-cell.is-firework.tone-firework-red {
  color: #ff6b8a;
  text-shadow:
    0 0 4px rgba(255, 107, 138, 0.92),
    0 0 12px rgba(255, 71, 111, 0.66),
    0 0 24px rgba(223, 42, 92, 0.38);
}

:root[data-theme="night"] .ascii-cell.is-firework.tone-firework-blue {
  color: #62d9ff;
  text-shadow:
    0 0 4px rgba(98, 217, 255, 0.94),
    0 0 12px rgba(48, 184, 255, 0.7),
    0 0 24px rgba(31, 132, 255, 0.4);
}

:root[data-theme="night"] .ascii-cell.is-firework.tone-firework-violet {
  color: #d7a2ff;
  text-shadow:
    0 0 4px rgba(215, 162, 255, 0.94),
    0 0 12px rgba(183, 105, 255, 0.68),
    0 0 24px rgba(133, 75, 255, 0.4);
}

:where(:root[data-theme="night"]) .ascii-cell.is-earth {
  color: rgba(139, 174, 183, 0.66);
}

:where(:root[data-theme="night"]) .ascii-cell.is-earth.tone-earth-deep-sea {
  color: rgba(76, 143, 184, 0.7);
}

:where(:root[data-theme="night"]) .ascii-cell.is-earth.tone-earth-shallow-sea {
  color: rgba(86, 174, 197, 0.72);
}

:where(:root[data-theme="night"]) .ascii-cell.is-earth.tone-earth-coast,
:where(:root[data-theme="night"]) .ascii-cell.is-earth.tone-earth-rim {
  color: rgba(168, 188, 191, 0.78);
}

:where(:root[data-theme="night"]) .ascii-cell.is-earth.tone-earth-rainforest,
:where(:root[data-theme="night"]) .ascii-cell.is-earth.tone-earth-forest,
:where(:root[data-theme="night"]) .ascii-cell.is-earth.tone-earth-grass,
:where(:root[data-theme="night"]) .ascii-cell.is-earth.tone-earth-dry,
:where(:root[data-theme="night"]) .ascii-cell.is-earth.tone-earth-mountain,
:where(:root[data-theme="night"]) .ascii-cell.is-earth.tone-earth-tundra {
  color: rgba(161, 181, 179, 0.72);
}

:where(:root[data-theme="night"]) .ascii-cell.is-earth.tone-earth-ice {
  color: rgba(205, 228, 231, 0.84);
}

:where(:root[data-theme="night"]) .ascii-cell.is-self {
  color: rgba(232, 231, 224, 0.84);
}

:root[data-theme="night"] .ascii-cell.is-author {
  color: rgba(235, 142, 102, 0.92);
}

:where(:root[data-theme="night"]) .ascii-cell.is-worldmodel {
  color: rgba(221, 216, 225, 0.58);
}

:where(:root[data-theme="night"]) .ascii-cell.is-earth.tone-earth-city-hot {
  color: rgba(242, 166, 26, 0.86);
}

:where(:root[data-theme="night"]) .ascii-cell.is-earth.tone-earth-city-dense {
  color: rgba(235, 177, 48, 0.78);
}

:where(:root[data-theme="night"]) .ascii-cell.is-earth.tone-earth-city-light {
  color: rgba(220, 142, 20, 0.67);
}

:where(:root[data-theme="night"]) .ascii-cell.is-earth.tone-earth-city-glow {
  color: rgba(213, 144, 23, 0.52);
}

:root[data-theme="night"] .diagram-readout::before,
:root[data-theme="night"] .worldmodel-caption.has-status::before {
  color: var(--muted);
}

:root[data-theme="night"] .footer-companions {
  color: #858d87;
}

:root[data-theme="night"] .footer-companions:hover,
:root[data-theme="night"] .footer-companions:focus-visible {
  color: #b8beb9;
}

:root[data-theme="night"] .footer-boy {
  filter: invert(0.78);
  opacity: 1;
}

:root[data-theme="night"] .footer-companions:hover .footer-boy,
:root[data-theme="night"] .footer-companions:focus-visible .footer-boy {
  filter: invert(0.9);
  opacity: 1;
}

@media (max-width: 900px) {
  .page {
    width: calc(100% - 28px);
    padding-top: 18px;
  }

  body:not(.meta-home):not(.worldmodel-page) footer {
    align-items: center;
    flex-direction: column;
  }

  footer {
    text-align: center;
  }

  nav {
    width: 100%;
    justify-content: flex-start;
    overflow-x: auto;
    padding-bottom: 3px;
  }

  .meta-main {
    padding: 26px 0 20px;
  }

  .worldmodel-diagram {
    min-width: 1020px;
  }

  .meta-home .worldmodel-diagram {
    min-width: 0;
  }

  .meta-home .page {
    width: 100%;
    padding-top: 18px;
  }

  .meta-home .masthead,
  .meta-home footer {
    width: calc(100% - 28px);
  }

  .meta-home .masthead,
  .meta-home footer {
    gap: 10px;
  }

  .masthead nav {
    width: auto;
    min-width: 0;
    justify-content: flex-end;
    overflow: visible;
  }

  .masthead .masthead-primary {
    justify-content: flex-start;
  }

  .meta-home footer,
  .worldmodel-page footer {
    grid-template-columns: minmax(0, 1fr);
    row-gap: 24px;
    font-size: 0.92rem;
  }

  .meta-home footer > span:first-child,
  .worldmodel-page footer > span:first-child {
    grid-column: 1;
    grid-row: 2;
  }

  .meta-home footer .elsewhere,
  .worldmodel-page footer .elsewhere {
    grid-column: 1;
    grid-row: 3;
    justify-self: center;
  }

  .diagram-readout,
  .worldmodel-caption {
    position: static;
    grid-column: 1 / -1;
    grid-row: 1;
    width: 100%;
    min-height: 1.55em;
    text-align: center;
    transform: translateY(4px);
  }

  .diagram-readout.is-visible {
    transform: none;
  }

  .worldmodel-caption {
    transform: none;
  }

  .meta-home .meta-main {
    padding: 8px 0;
  }

  .meta-home footer {
    padding-top: 22px;
  }

  .content-main {
    padding-top: 54px;
  }

  .worldmodel-page .masthead,
  .worldmodel-page footer {
    width: calc(100% - 28px);
  }

  .worldmodel-page .worldmodel-main {
    padding: 8px 0;
  }

  .map-viewport {
    height: 100%;
  }

  h1 {
    font-size: 3rem;
  }

  .lede {
    font-size: 1.06rem;
  }

  .academic-main {
    padding-top: 48px;
  }
}

@media (max-width: 680px) {
  .academic-intro {
    grid-template-columns: 116px minmax(0, 1fr);
    column-gap: 20px;
    row-gap: 14px;
    align-items: center;
    margin-bottom: 35px;
  }

  .academic-details {
    display: contents;
  }

  .academic-photo-wrap {
    grid-column: 1;
    grid-row: 1;
    align-self: center;
  }

  .academic-identity {
    grid-column: 2;
    grid-row: 1;
  }

  .academic-contact {
    grid-column: 1 / -1;
    grid-row: 2;
    margin-top: 0;
  }

  .academic-photo {
    width: 116px;
  }

  .academic-photo-wrap figcaption {
    font-size: 0.65rem;
  }

  .academic-kicker {
    margin-top: 2px;
  }

  .academic-identity h1 {
    margin-bottom: 11px;
    font-size: clamp(1.8rem, 8vw, 2.55rem);
  }

  .academic-identity h1 .academic-name-en,
  .academic-identity h1 .academic-name-zh {
    display: block;
    color: inherit;
    font-size: inherit;
    font-weight: inherit;
    letter-spacing: inherit;
  }

  .academic-identity h1 .academic-name-en {
    margin-top: 0;
  }

  .academic-identity h1 .academic-name-zh {
    margin-top: 11px;
    margin-left: 0;
  }

  .academic-role,
  .academic-affiliation {
    font-size: 0.88rem;
  }

  .academic-contact {
    margin-top: 12px;
    font-size: 0.8rem;
  }
}

@media (max-width: 520px) {
  .brand {
    gap: 8px;
  }

  .brand img {
    width: 36px;
    height: 36px;
  }

  nav {
    width: auto;
    gap: 12px;
    overflow: visible;
  }

}

@media (max-width: 460px) {
  .worldmodel-header-title span {
    display: none;
  }

  .worldmodel-header-title svg {
    width: 17px;
    height: 17px;
  }
}

@media (max-width: 420px) {
  .about-wide {
    display: none;
  }

  .about-compact {
    display: inline;
  }

  h1 {
    font-size: 2.24rem;
  }

  .map-viewport {
    height: 100%;
    min-height: 0;
  }

  .map-key {
    right: 10px;
    bottom: 5px;
    max-width: calc(100% - 20px);
  }

  .map-legend {
    grid-template-columns: repeat(2, max-content);
    column-gap: 10px;
    row-gap: 3px;
  }

  .worldmodel-caption {
    width: 100%;
  }

  .academic-main {
    padding-top: 38px;
  }

  .academic-intro {
    grid-template-columns: 88px minmax(0, 1fr);
    gap: 15px;
  }

  .academic-photo {
    width: 88px;
  }

  .academic-photo-wrap figcaption {
    display: none;
  }

  .academic-kicker {
    font-size: 0.62rem;
  }

  .academic-identity h1 {
    font-size: 1.67rem;
  }

  .academic-identity h1 span {
    display: block;
    margin-top: 4px;
    font-size: 0.48em;
  }

  .academic-role,
  .academic-affiliation {
    font-size: 0.78rem;
    line-height: 1.35;
  }

  .academic-contact {
    gap: 2px 7px;
    font-size: 0.74rem;
  }

  .academic-item {
    padding-left: 13px;
  }

  .academic-item-heading {
    display: block;
  }

  .academic-item time {
    display: block;
    margin-top: 3px;
  }
}

/* Switch directly from the full footer to a compact single-row utility bar. */
@media (max-width: 900px) {
  .page,
  .meta-home .page,
  .worldmodel-page .page,
  body.life-page .page {
    padding-bottom: max(12px, env(safe-area-inset-bottom));
  }

  footer {
    gap: 12px;
    padding-top: 10px;
    font-size: 0.78rem;
    text-align: left;
  }

  body:not(.meta-home):not(.worldmodel-page) footer {
    align-items: center;
    flex-direction: row;
  }

  .life-page .page > footer {
    padding-top: 10px;
  }

  footer > span:first-child {
    flex: 0 0 auto;
    white-space: nowrap;
  }

  .footer-credit {
    display: none;
  }

  footer .elsewhere {
    gap: 12px;
    margin-left: auto;
  }

  footer .elsewhere a {
    display: inline-flex;
    min-height: 32px;
    align-items: center;
  }

  .meta-home footer,
  .worldmodel-page footer {
    grid-template-columns: auto minmax(0, 1fr);
    column-gap: 12px;
    row-gap: 0;
    padding-top: 10px;
    font-size: 0.78rem;
  }

  .meta-home footer > span:first-child,
  .worldmodel-page footer > span:first-child {
    grid-column: 1;
    grid-row: 1;
  }

  .meta-home footer .elsewhere,
  .worldmodel-page footer .elsewhere {
    grid-column: 2;
    grid-row: 1;
    justify-self: end;
    margin-left: 0;
  }
}

/* On phone-sized screens, status copy floats over the canvas. */
@media (max-width: 600px) {
  .diagram-readout,
  .worldmodel-caption {
    position: fixed;
    top: calc(env(safe-area-inset-top) + 68px);
    left: 50%;
    z-index: 8;
    width: max-content;
    max-width: calc(100vw - 28px);
    min-height: 0;
    padding: 0;
    border: 0;
    background: transparent;
    box-shadow: none;
    font-size: 0.76rem;
    line-height: 1.35;
    text-align: center;
    transform: translate(-50%, -4px);
  }

  .worldmodel-caption:not(.has-status) {
    display: none;
  }

  .diagram-readout.is-visible {
    transform: translate(-50%, 0);
  }

  .worldmodel-caption {
    transform: translateX(-50%);
  }
}

@media (prefers-reduced-motion: reduce) {
  *,
  *::before,
  *::after {
    animation-duration: 0.001ms !important;
    animation-iteration-count: 1 !important;
    scroll-behavior: auto !important;
    transition-duration: 0.001ms !important;
  }
}