:root {
  color-scheme: dark;
  --page: #080b10;
  --surface: #0e151c;
  --surface-raised: #131d26;
  --text: #edf4f7;
  --text-soft: #cbd7dd;
  --muted: #a2b0ba;
  --faint: #8294a0;
  --line: #23313b;
  --line-strong: #3b5260;
  --accent: #67d8ff;
  --accent-bright: #b9efff;
  --accent-alt: #d28bff;
  --accent-warm: #ffb86c;
  --page-accent: var(--accent);
  --sans: Inter, ui-sans-serif, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  --mono: "SFMono-Regular", Consolas, "Liberation Mono", monospace;
  --page-width: 70rem;
  --gutter: clamp(1.25rem, 4vw, 3.25rem);
  --intro-top: clamp(4rem, 8vw, 6.5rem);
  --intro-bottom: 2.5rem;
  --font-meta: 0.875rem;
  --font-small: 1rem;
  --font-body: 1.0625rem;
  --font-intro: 1.1rem;
  --font-subheading: 1.125rem;
  --font-large: 1.25rem;
  --font-label: 1.3rem;
  --font-page-title: clamp(2.75rem, 5vw, 3.75rem);
  --font-section-title: clamp(1.4rem, 2.5vw, 1.9rem);
  --font-entry-title: clamp(1.25rem, 2.3vw, 1.65rem);
  --font-feature-title: clamp(1.65rem, 3vw, 2.3rem);
}

* {
  box-sizing: border-box;
}

html {
  min-width: 20rem;
  scroll-behavior: smooth;
}

body {
  display: flex;
  min-height: 100vh;
  margin: 0;
  flex-direction: column;
  color: var(--text);
  background:
    radial-gradient(circle at 100% 0%, rgba(103, 216, 255, 0.07), transparent 31rem),
    radial-gradient(circle at 0% 68%, rgba(210, 139, 255, 0.04), transparent 36rem),
    var(--page);
  background-attachment: fixed;
  font-family: var(--sans);
  font-size: var(--font-body);
  line-height: 1.7;
  text-rendering: optimizeLegibility;
}

body::before {
  position: fixed;
  z-index: 50;
  inset: 0;
  background: repeating-linear-gradient(
    to bottom,
    rgba(255, 255, 255, 0.012) 0,
    rgba(255, 255, 255, 0.012) 1px,
    transparent 1px,
    transparent 4px
  );
  content: "";
  pointer-events: none;
}

.page-ai {
  --page-accent: var(--accent);
}

.page-visualizations {
  --page-accent: var(--accent-alt);
}

.page-about {
  --page-accent: var(--accent-warm);
}

::selection {
  color: var(--page);
  background: var(--accent);
}

main {
  flex: 1;
}

a {
  color: var(--accent-bright);
  text-decoration-color: #56758a;
  text-decoration-thickness: 1px;
  text-underline-offset: 0.22em;
}

a:hover {
  color: #d6e9f5;
  text-decoration-color: currentColor;
}

:focus-visible {
  outline: 3px solid var(--accent);
  outline-offset: 4px;
}

.page-width {
  width: min(var(--page-width), calc(100% - (2 * var(--gutter))));
  margin-inline: auto;
}

.skip-link {
  position: fixed;
  z-index: 100;
  top: 0.75rem;
  left: 0.75rem;
  padding: 0.55rem 0.8rem;
  color: var(--page);
  background: var(--accent-bright);
  transform: translateY(-180%);
}

.skip-link:focus {
  transform: translateY(0);
}

.visually-hidden {
  position: absolute;
  overflow: hidden;
  width: 1px;
  height: 1px;
  padding: 0;
  border: 0;
  margin: -1px;
  clip: rect(0 0 0 0);
  white-space: nowrap;
}

.site-header {
  position: relative;
  border-bottom: 1px solid var(--line);
  background: rgba(8, 11, 16, 0.9);
  backdrop-filter: blur(14px);
}

.site-header::before {
  position: absolute;
  top: 0;
  right: 0;
  left: 0;
  height: 2px;
  background: linear-gradient(90deg, var(--accent), var(--accent-alt) 55%, var(--accent-warm));
  box-shadow: 0 0 16px rgba(103, 216, 255, 0.24);
  content: "";
}

.site-header__inner {
  display: flex;
  width: min(var(--page-width), calc(100% - (2 * var(--gutter))));
  min-height: 5.25rem;
  margin-inline: auto;
  align-items: center;
  justify-content: space-between;
  gap: 2rem;
}

.brand {
  display: inline-flex;
  align-items: baseline;
  gap: 0.85rem;
  color: var(--text);
  text-decoration: none;
}

.brand:hover {
  color: var(--text);
}

.brand__name {
  font-weight: 680;
  letter-spacing: -0.02em;
}

.brand__domain {
  color: var(--faint);
  font-family: var(--mono);
  font-size: var(--font-meta);
}

.site-nav {
  display: flex;
  align-items: center;
  gap: clamp(1.1rem, 3vw, 2.2rem);
}

.site-nav a {
  position: relative;
  padding-block: 0.25rem;
  color: var(--muted);
  font-size: var(--font-small);
  font-weight: 600;
  text-decoration: none;
}

.site-nav a:hover,
.site-nav a[aria-current="page"] {
  color: var(--text);
}

.site-nav a[aria-current="page"]::after {
  position: absolute;
  right: 0;
  bottom: -0.45rem;
  left: 0;
  height: 1px;
  background: var(--page-accent);
  box-shadow: 0 0 9px color-mix(in srgb, var(--page-accent) 65%, transparent);
  content: "";
}

.section-label {
  margin: 0 0 1rem;
  color: var(--page-accent);
  font-family: var(--mono);
  font-size: var(--font-label);
  font-weight: 600;
  letter-spacing: 0.08em;
  line-height: 1.4;
  text-transform: uppercase;
}

h1,
h2,
h3,
p {
  overflow-wrap: break-word;
}

h1 {
  margin: 0;
  font-size: var(--font-page-title);
  font-weight: 620;
  letter-spacing: -0.055em;
  line-height: 1.04;
}

h2 {
  margin: 0;
  font-size: var(--font-section-title);
  font-weight: 620;
  letter-spacing: -0.03em;
  line-height: 1.25;
}

h3 {
  margin: 0;
  font-size: var(--font-subheading);
  font-weight: 650;
  letter-spacing: -0.01em;
  line-height: 1.45;
}

/* Home */

.home {
  padding-block: var(--intro-top) clamp(4.5rem, 8vw, 7rem);
}

.home-intro {
  display: grid;
  min-height: 18rem;
  margin-bottom: var(--intro-bottom);
  grid-template-columns: minmax(0, 1.55fr) minmax(18rem, 0.75fr);
  gap: clamp(3rem, 10vw, 9rem);
  align-items: start;
}

.home-intro h1 {
  max-width: 12ch;
}

.home-intro__copy {
  align-self: center;
  color: var(--text-soft);
  font-size: var(--font-intro);
}

.home-intro__copy > p:first-child {
  margin: 0;
}

.section-directory {
  border-top: 1px solid var(--line-strong);
}

.directory-item {
  --item-accent: var(--accent);
  display: grid;
  grid-template-columns: 3.5rem minmax(10rem, 0.75fr) minmax(16rem, 1.4fr) 2rem;
  gap: 1.5rem;
  align-items: center;
  padding: 1.8rem 0;
  color: inherit;
  border-bottom: 1px solid var(--line);
  text-decoration: none;
  transition: color 150ms ease, padding 150ms ease, background 150ms ease, box-shadow 150ms ease;
}

.directory-item:nth-of-type(2) {
  --item-accent: var(--accent-alt);
}

.directory-item:nth-of-type(3) {
  --item-accent: var(--accent-warm);
}

.directory-item:hover {
  padding-inline: 0.7rem;
  color: inherit;
  background: linear-gradient(90deg, color-mix(in srgb, var(--item-accent) 8%, var(--surface)), var(--surface));
  box-shadow: inset 2px 0 0 var(--item-accent);
}

.directory-item__number {
  color: var(--item-accent);
  font-family: var(--mono);
  font-size: var(--font-body);
  font-weight: 700;
}

.directory-item__title {
  font-size: var(--font-entry-title);
  font-weight: 620;
  letter-spacing: -0.025em;
  transition: color 150ms ease;
}

.directory-item:hover .directory-item__title {
  color: var(--item-accent);
}

.directory-item__description {
  color: var(--muted);
  font-size: var(--font-body);
}

.directory-item__arrow {
  justify-self: end;
  color: var(--item-accent);
  font-size: var(--font-large);
  transition: transform 150ms ease;
}

.directory-item:hover .directory-item__arrow {
  transform: translate(0.15rem, -0.15rem);
}

.home-progress {
  display: grid;
  grid-template-columns: minmax(12rem, 0.5fr) minmax(0, 1.5fr);
  gap: clamp(2.5rem, 6vw, 5.5rem);
  margin-top: clamp(4rem, 8vw, 7rem);
  padding-top: clamp(3rem, 6vw, 5rem);
  border-top: 1px solid var(--line-strong);
}

.home-progress__heading h2 {
  max-width: 12ch;
}

.activity-list {
  border-top: 1px solid var(--line-strong);
}

.activity-item {
  display: grid;
  grid-template-columns: 2.25rem minmax(0, 1fr) auto;
  gap: 1.5rem;
  align-items: start;
  padding: 1.45rem 0;
  color: inherit;
  border-bottom: 1px solid var(--line);
  text-decoration: none;
}

.activity-item:hover {
  color: inherit;
}

.activity-item__number,
.activity-item__status {
  color: var(--accent);
  font-family: var(--mono);
  font-size: var(--font-meta);
}

.activity-item__content {
  display: grid;
  gap: 0.25rem;
}

.activity-item__content strong {
  font-size: var(--font-body);
  font-weight: 650;
}

.activity-item__content > span {
  color: var(--muted);
}

.activity-item__status {
  display: inline-flex;
  align-items: center;
  gap: 0.45rem;
}

.activity-item__status::before {
  width: 0.42rem;
  height: 0.42rem;
  border-radius: 50%;
  background: currentColor;
  box-shadow: 0 0 9px currentColor;
  content: "";
}

/* Inner pages */

.page-heading {
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(19rem, 0.62fr);
  gap: clamp(3rem, 10vw, 9rem);
  padding-block: var(--intro-top) var(--intro-bottom);
  align-items: start;
}

.page-heading > p {
  align-self: end;
  margin: 0;
  color: var(--text-soft);
  font-size: var(--font-intro);
}

.page-heading__copy {
  align-self: end;
  color: var(--text-soft);
  font-size: var(--font-intro);
}

.page-heading__copy p {
  margin: 0;
}

.content-section {
  display: grid;
  grid-template-columns: minmax(12rem, 0.52fr) minmax(0, 1.75fr);
  gap: clamp(2.5rem, 6vw, 5.5rem);
  padding-block: clamp(3.25rem, 6vw, 5rem);
  border-top: 1px solid var(--line-strong);
}

.content-section > header h2 {
  max-width: 12ch;
}

.entry-list,
.discipline-list {
  border-top: 1px solid var(--line-strong);
}

.entry {
  padding: 1.8rem 0 2rem;
  border-bottom: 1px solid var(--line);
}

.entry__meta {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  margin-bottom: 1rem;
  color: var(--faint);
  font-family: var(--mono);
  font-size: var(--font-small);
  letter-spacing: 0.02em;
}

.status {
  display: inline-flex;
  align-items: center;
  gap: 0.45rem;
  color: var(--page-accent);
}

.status::before {
  width: 0.42rem;
  height: 0.42rem;
  border-radius: 50%;
  background: var(--page-accent);
  box-shadow: 0 0 9px var(--page-accent);
  content: "";
}

.entry h3 {
  font-size: var(--font-entry-title);
  font-weight: 590;
  letter-spacing: -0.025em;
}

.entry > p:not(.entry__tools) {
  max-width: 43rem;
  margin: 0.85rem 0 0;
  color: var(--muted);
}

.entry__tools {
  margin: 1.1rem 0 0;
  color: var(--faint);
  font-family: var(--mono);
  font-size: var(--font-meta);
}

.entry__number {
  margin-right: 0.55rem;
  color: var(--page-accent);
  font-size: var(--font-body);
  font-weight: 700;
}

/* Visualizations */

.visualization-index {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  border-top: 1px solid var(--line-strong);
  border-bottom: 1px solid var(--line-strong);
}

.visualization-index a {
  display: grid;
  grid-template-columns: auto minmax(0, 1fr);
  gap: 0.1rem 0.9rem;
  padding: 1.35rem 1.3rem;
  color: inherit;
  text-decoration: none;
}

.visualization-index a + a {
  border-left: 1px solid var(--line);
}

.visualization-index a:hover {
  background: color-mix(in srgb, var(--page-accent) 7%, var(--surface));
}

.visualization-index span {
  grid-row: 1 / 3;
  color: var(--page-accent);
  font-family: var(--mono);
  font-size: var(--font-small);
  font-weight: 700;
}

.visualization-index strong {
  font-size: var(--font-small);
  font-weight: 650;
  line-height: 1.35;
}

.visualization-index small {
  color: var(--faint);
  font-family: var(--mono);
  font-size: var(--font-meta);
  line-height: 1.4;
}

.visualization-entry {
  padding-block: clamp(4rem, 8vw, 7rem);
  scroll-margin-top: 2rem;
}

.visualization-entry + .visualization-entry {
  border-top: 1px solid var(--line-strong);
}

.visualization-entry__header {
  display: grid;
  grid-template-columns: minmax(15rem, 0.82fr) minmax(0, 1.2fr);
  gap: clamp(2.5rem, 7vw, 6rem);
  align-items: start;
  margin-bottom: clamp(2.5rem, 5vw, 4rem);
}

.visualization-entry__identity p {
  margin: 0;
}

.visualization-entry__number {
  color: var(--page-accent);
  font-family: var(--mono);
  font-size: var(--font-large);
  font-weight: 700;
}

.visualization-entry__type {
  margin-top: 0.4rem !important;
  color: var(--faint);
  font-family: var(--mono);
  font-size: var(--font-body);
}

.visualization-entry__identity h2 {
  margin-top: 1.25rem;
  font-size: var(--font-feature-title);
}

.visualization-entry__description {
  color: var(--text-soft);
  font-size: var(--font-body);
}

.visualization-entry__description p {
  margin: 0;
}

.visualization-entry__description p + p {
  margin-top: 0.9rem;
}

.chart-panel {
  margin: 0;
  padding: clamp(1rem, 2.5vw, 1.7rem);
  overflow: hidden;
  border: 1px solid color-mix(in srgb, var(--page-accent) 42%, var(--line-strong));
  background:
    linear-gradient(rgba(210, 139, 255, 0.045) 1px, transparent 1px),
    linear-gradient(90deg, rgba(103, 216, 255, 0.04) 1px, transparent 1px),
    #0c1218;
  background-size: 4rem 4rem;
  box-shadow: inset 0 0 80px rgba(210, 139, 255, 0.025), 0 18px 60px rgba(0, 0, 0, 0.18);
}

@media (min-width: 681px) {
  .page-visualizations .visualization-entry > .chart-panel:not(.is-expanded) {
    width: min(92rem, calc(100vw - (2 * var(--gutter))));
    margin-left: 50%;
    transform: translateX(-50%);
  }
}

.chart-panel__toolbar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  padding-bottom: 1rem;
  border-bottom: 1px solid var(--line);
  color: var(--faint);
  font-family: var(--mono);
  font-size: var(--font-meta);
  letter-spacing: 0.03em;
  text-transform: uppercase;
}

.chart-panel__toolbar button {
  padding: 0.48rem 0.75rem;
  color: var(--text-soft);
  border: 1px solid var(--line-strong);
  background: var(--surface-raised);
  font: inherit;
  letter-spacing: inherit;
  text-transform: inherit;
  cursor: pointer;
}

.chart-panel__toolbar button:hover {
  color: var(--text);
  border-color: var(--page-accent);
}

.chart-legend {
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem 1.4rem;
  margin-top: 1rem;
  color: var(--muted);
  font-family: var(--mono);
  font-size: var(--font-meta);
}

.chart-legend span {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
}

.legend-node {
  width: 0.75rem;
  height: 0.75rem;
  border-radius: 50%;
  box-shadow: 0 0 8px currentColor;
}

.legend-node--player {
  color: var(--accent);
  background: currentColor;
}

.legend-node--deck {
  color: var(--accent-alt);
  border: 2px solid currentColor;
  background: var(--surface-raised);
}

.legend-link {
  width: 1.5rem;
  height: 2px;
  background: linear-gradient(90deg, var(--accent), var(--accent-alt));
  box-shadow: 0 0 7px color-mix(in srgb, var(--accent) 55%, transparent);
}

.d3-chart {
  width: 100%;
  margin-top: 0.75rem;
  overflow-x: auto;
}

.d3-chart svg {
  display: block;
  width: 100%;
  height: auto;
}

.d3-chart--network {
  overflow: auto;
}

.constellation-svg {
  min-width: 47.5rem;
}

.constellation-background {
  fill: transparent;
}

.constellation-link {
  stroke: color-mix(in srgb, var(--line-strong) 82%, var(--accent-alt));
  stroke-linecap: round;
  opacity: 0.58;
  cursor: pointer;
  outline: none;
  transition: opacity 130ms ease, stroke 130ms ease, filter 130ms ease;
}

.constellation-link.is-active,
.constellation-link:focus-visible {
  stroke: var(--constellation-link-color, var(--accent));
  opacity: 1;
  filter: drop-shadow(0 0 5px var(--constellation-link-color, var(--accent)));
}

.constellation-link.is-pinned {
  filter:
    drop-shadow(0 0 4px var(--constellation-link-color, var(--accent)))
    drop-shadow(0 0 9px var(--constellation-link-color, var(--accent)));
}

.constellation-link.is-dimmed {
  opacity: 0.07;
}

.constellation-node {
  cursor: grab;
  outline: none;
  transition: opacity 130ms ease, filter 130ms ease;
}

.constellation-node:active {
  cursor: grabbing;
}

.constellation-node__circle {
  filter: drop-shadow(0 5px 7px rgba(0, 0, 0, 0.32));
  stroke-width: 1.6px;
}

.constellation-node.is-player .constellation-node__circle {
  fill-opacity: 1;
  stroke: rgba(255, 255, 255, 0.48);
}

.constellation-node.is-deck .constellation-node__circle {
  fill: var(--surface-raised);
  stroke: var(--accent-alt);
}

.constellation-node.is-active,
.constellation-node.is-origin,
.constellation-node.is-pinned,
.constellation-node:focus-visible {
  filter: drop-shadow(0 0 8px var(--constellation-node-color, var(--accent-alt)));
}

.constellation-node.is-origin .constellation-node__circle,
.constellation-node.is-pinned .constellation-node__circle,
.constellation-node:focus-visible .constellation-node__circle {
  stroke: var(--text);
  stroke-width: 3px;
}

.constellation-node.is-dimmed {
  opacity: 0.14;
}

.constellation-node-core {
  fill: #e7defe;
  font-family: var(--mono);
  font-size: 15px;
  font-weight: 900;
  paint-order: stroke;
  stroke: var(--surface-raised);
  stroke-width: 2px;
  pointer-events: none;
}

.constellation-node.is-player .constellation-node-core {
  fill: #071019;
  stroke: none;
}

.constellation-node-label {
  fill: var(--text-soft);
  font-family: var(--mono);
  font-size: 0.78rem;
  font-weight: 600;
  paint-order: stroke;
  stroke: #0c1218;
  stroke-width: 4px;
  stroke-linejoin: round;
  pointer-events: none;
}

.chart-error {
  margin: 2rem 0;
  color: var(--muted);
  font-family: var(--mono);
  text-align: center;
}

.chart-panel figcaption {
  padding-top: 1rem;
  border-top: 1px solid var(--line);
  color: var(--faint);
  font-size: var(--font-small);
}

.chart-tooltip {
  position: fixed;
  z-index: 110;
  max-width: 13rem;
  padding: 0.48rem 0.65rem;
  color: var(--text);
  border: 1px solid var(--page-accent);
  background: rgba(8, 11, 16, 0.96);
  box-shadow: 0 0 20px color-mix(in srgb, var(--page-accent) 18%, transparent);
  font-family: var(--mono);
  font-size: var(--font-meta);
  line-height: 1.4;
  white-space: pre-line;
  opacity: 0;
  pointer-events: none;
  transform: translateY(0.3rem);
  transition: opacity 100ms ease, transform 100ms ease;
}

.chart-tooltip.is-visible {
  opacity: 1;
  transform: translateY(0);
}

.chart-panel.is-expanded {
  position: fixed;
  z-index: 90;
  inset: 1.5rem;
  margin: 0;
  overflow: auto;
  background-color: #0c1218;
}

.chart-panel.is-expanded .d3-chart {
  width: min(86rem, 100%);
  margin-inline: auto;
}

body.has-expanded-chart {
  overflow: hidden;
}

body.has-expanded-chart .chart-panel:not(.is-expanded) {
  visibility: hidden;
}

body.has-expanded-chart::after {
  position: fixed;
  z-index: 80;
  inset: 0;
  background: rgba(2, 5, 8, 0.76);
  content: "";
  pointer-events: none;
}

.chart-load-error {
  display: grid;
  min-height: 18rem;
  place-items: center;
  color: var(--accent-warm);
  font-family: var(--mono);
  text-align: center;
}

/* About */

.about-heading {
  display: grid;
  grid-template-columns: minmax(0, 1.75fr) minmax(14rem, 0.65fr);
  gap: clamp(3rem, 7vw, 6rem);
  padding-block: var(--intro-top) var(--intro-bottom);
}

.about-intro {
  max-width: 47rem;
  margin-top: 1.75rem;
  color: var(--text-soft);
  font-size: var(--font-intro);
}

.about-intro p {
  margin: 0;
}

.about-intro p + p {
  margin-top: 1rem;
}

.profile-details {
  align-self: end;
  margin: 0;
  border-top: 1px solid var(--line-strong);
}

.profile-details div {
  padding: 0.9rem 0;
  border-bottom: 1px solid var(--line);
}

.profile-details dt {
  color: var(--faint);
  font-family: var(--mono);
  font-size: var(--font-meta);
  letter-spacing: 0.05em;
  text-transform: uppercase;
}

.profile-details dd {
  margin: 0.12rem 0 0;
  color: var(--text-soft);
  font-size: var(--font-small);
}

.discipline {
  display: grid;
  grid-template-columns: 2.2rem minmax(10rem, 0.8fr) minmax(15rem, 1.4fr);
  gap: 1.5rem;
  padding: 1.55rem 0;
  border-bottom: 1px solid var(--line);
}

.discipline__number {
  margin: 0;
  color: var(--faint);
  font-family: var(--mono);
  font-size: var(--font-intro);
  line-height: 1.45;
}

.discipline > p:not(.discipline__number):not(.discipline__tools) {
  margin: 0;
  color: var(--muted);
}

.discipline__tools {
  grid-column: 3;
  margin: 0.5rem 0 0;
  color: var(--faint);
  font-family: var(--mono);
  font-size: var(--font-meta);
}

.background-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 0 2.5rem;
  border-top: 1px solid var(--line-strong);
}

.background-item {
  padding: 1.3rem 0;
  border-bottom: 1px solid var(--line);
}

.background-item p {
  margin: 0;
}

.background-item p:first-child {
  font-weight: 620;
}

.background-item p:last-child {
  margin-top: 0.25rem;
  color: var(--muted);
  font-size: var(--font-small);
}

.story-list {
  border-top: 1px solid var(--line-strong);
}

.story-item {
  display: grid;
  grid-template-columns: 2.25rem minmax(0, 1fr);
  gap: 1.5rem;
  padding: 1.65rem 0;
  border-bottom: 1px solid var(--line);
}

.story-item__number {
  margin: 0.15rem 0 0;
  color: var(--page-accent);
  font-family: var(--mono);
  font-size: var(--font-small);
}

.story-item div p {
  max-width: 43rem;
  margin: 0.65rem 0 0;
  color: var(--muted);
}

.site-footer {
  border-top: 1px solid var(--line);
  background: #06090d;
}

.site-footer .page-width {
  display: flex;
  min-height: 5.5rem;
  align-items: center;
  justify-content: space-between;
  gap: 2rem;
  color: var(--faint);
  font-family: var(--mono);
  font-size: var(--font-meta);
}

.site-footer p {
  margin: 0;
}

.site-footer a {
  color: var(--muted);
}

.brand__domain,
.entry__tools,
.profile-details dt,
.discipline__tools,
.site-footer .page-width {
  font-size: var(--font-meta);
}

.page-about .discipline__number {
  color: var(--page-accent);
}

.activity-item__number,
.story-item__number {
  font-size: var(--font-small);
  font-weight: 700;
}

.discipline__number {
  font-size: var(--font-intro);
  font-weight: 700;
}

.directory-item__number {
  font-size: var(--font-body);
  font-weight: 700;
}

@media (max-width: 900px) {
  .home-intro,
  .page-heading,
  .about-heading,
  .content-section,
  .home-progress {
    grid-template-columns: 1fr;
    gap: 3rem;
  }

  .home-intro {
    min-height: auto;
  }

  .home-intro__copy,
  .page-heading > p,
  .page-heading__copy {
    max-width: 38rem;
    padding-top: 0;
  }

  .visualization-entry__header {
    grid-template-columns: 1fr;
    gap: 2rem;
  }

  .profile-details {
    display: grid;
    grid-template-columns: repeat(2, minmax(0, 1fr));
    column-gap: 2rem;
  }

  .content-section > header h2 {
    max-width: none;
  }

  .directory-item {
    grid-template-columns: 3rem minmax(9rem, 0.75fr) minmax(14rem, 1.2fr) 2rem;
  }
}

@media (max-width: 680px) {
  :root {
    --intro-top: 3.75rem;
  }

  .site-header__inner {
    min-height: auto;
    flex-direction: column;
    align-items: flex-start;
    gap: 0.9rem;
    padding-block: 1rem 1.15rem;
  }

  .site-nav {
    width: 100%;
    gap: 1.25rem;
    overflow-x: auto;
    padding-bottom: 0.2rem;
  }

  .site-nav a {
    flex: 0 0 auto;
  }

  .brand__domain {
    display: none;
  }

  .directory-item {
    grid-template-columns: 2rem minmax(0, 1fr) 1.5rem;
    gap: 0.8rem 1rem;
  }

  .directory-item__description {
    grid-column: 2 / -1;
  }

  .directory-item__arrow {
    grid-column: 3;
    grid-row: 1;
  }

  .profile-details,
  .background-grid {
    grid-template-columns: 1fr;
  }

  .discipline {
    grid-template-columns: 1.8rem minmax(0, 1fr);
    gap: 0.45rem 1rem;
  }

  .discipline > p:not(.discipline__number):not(.discipline__tools),
  .discipline__tools {
    grid-column: 2;
  }

  .activity-item {
    grid-template-columns: 1.75rem minmax(0, 1fr);
    gap: 1rem;
  }

  .activity-item__status {
    grid-column: 2;
  }

  .visualization-index {
    grid-template-columns: 1fr;
  }

  .visualization-index a + a {
    border-top: 1px solid var(--line);
    border-left: 0;
  }

  .chart-panel {
    margin-inline: calc(-1 * var(--gutter));
    border-right: 0;
    border-left: 0;
    background-size: 3rem 3rem;
  }

  .d3-chart svg {
    width: 40rem;
    max-width: none;
  }

  .chart-panel.is-expanded {
    inset: 0;
  }

  .site-footer .page-width {
    min-height: 6rem;
    flex-direction: column;
    align-items: flex-start;
    justify-content: center;
    gap: 0.4rem;
  }
}

@media (prefers-reduced-motion: reduce) {
  html {
    scroll-behavior: auto;
  }

  .directory-item,
  .directory-item__arrow,
  .chart-tooltip {
    transition: none;
  }
}