:root {
  --paper:#fbf7ed;
  --ink:#0a2724;
  --muted:#425854;
  --line:#c0d3cd;
  --accent:#005d51;
  --gold:#715215;
  --dark:#0f1d23;
  --tint:#dbf1ea;
  --on-dark:#b9d0ce;
  --body-1:#6ed0b7;
  --body-2:#eabc6e;
  --body-3:#caa0e9;
  --body-1-ink:#035e4d;
  --body-2-ink:#715215;
  --body-3-ink:#63417b;
  --fade:180ms;
  --settle:220ms;
  --ease-settle:cubic-bezier(.2,.8,.3,1);
  font-family:Arial,Helvetica,sans-serif;
  color:var(--ink);
  background:var(--paper);
  font-synthesis:none
}
* {
  box-sizing:border-box
}
html {
  scroll-behavior:smooth;
  scroll-padding-top:90px
}
body {
  margin:0
}
a {
  color:inherit;
  text-underline-offset:4px
}
button,input,select {
  font:inherit
}
button,a,input,select,summary {
  -webkit-tap-highlight-color:transparent
}
a:focus-visible,button:focus-visible,input:focus-visible,select:focus-visible,summary:focus-visible {
  outline:3px solid #a5783f;
  outline-offset:5px
}
button {
  cursor:pointer
}
img,svg {
  display:block;
  max-width:100%;
  height:auto
}
h1,h2,h3,p {
  margin-top:0
}
h1,h2 {
  font-family:Georgia,'Times New Roman',serif;
  font-weight:400;
  letter-spacing:-.055em;
  line-height:1.06
}
h1 {
  font-size:clamp(52px,6.3vw,92px);
  margin-bottom:28px
}
h2 {
  font-size:clamp(37px,4.5vw,66px);
  margin-bottom:25px
}
h3 {
  font-size:19px;
  font-weight:500;
  letter-spacing:-.025em
}
p {
  line-height:1.7
}
em {
  font-weight:400;
  color:var(--accent)
}
.site-header {
  height:99px;
  display:flex;
  align-items:center;
  justify-content:space-between;
  gap:24px;
  max-width:1440px;
  margin:auto;
  padding:0 5vw;
  border-bottom:1px solid var(--line)
}
.wordmark {
  text-decoration:none;
  font-size:29px;
  letter-spacing:-1.6px;
  font-weight:600
}
.wordmark span {
  display:block;
  letter-spacing:2.2px;
  font-size:9px;
  margin-top:8px;
  font-weight:400
}
.site-header nav {
  display:flex;
  gap:28px;
  font-size:12px
}
.site-header nav a {
  text-decoration:none
}
.site-header nav a:hover {
  text-decoration:underline
}
.hero {
  max-width:1440px;
  margin:auto;
  padding:84px 5vw 95px;
  display:grid;
  grid-template-columns:1.02fr 1fr;
  align-items:center;
  gap:5vw
}
.eyebrow {
  font-size:10px;
  letter-spacing:2.2px;
  text-transform:uppercase;
  font-weight:600;
  color:var(--muted);
  margin-bottom:25px
}
.lead {
  font-size:19px;
  max-width:430px;
  color:var(--muted);
  margin-bottom:32px
}
.button {
  display:inline-flex;
  align-items:center;
  gap:40px;
  text-decoration:none;
  font-size:12px;
  padding:18px 23px;
  border:1px solid var(--ink)
}
.button.dark {
  background:var(--ink);
  color:var(--paper)
}
.button:hover {
  background:var(--accent)
}
.edition {
  font-size:10px;
  color:var(--muted);
  margin-top:24px
}
.hero-plate {
  margin:0;
  box-shadow:18px 18px 0 #e9e7db
}
.hero-plate img {
  width:100%;
  background:var(--dark)
}
.hero-plate figcaption {
  display:flex;
  justify-content:space-between;
  gap:20px;
  padding:16px;
  background:#e9e7db;
  font-size:9px;
  line-height:1.5;
  letter-spacing:.6px
}
.section {
  max-width:1300px;
  margin:auto;
  padding:85px 40px;
  border-top:1px solid var(--line)
}
.dedication {
  display:grid;
  grid-template-columns:1fr 2fr;
  gap:70px
}
.dedication>div {
  max-width:720px
}
.large-copy {
  font-family:Georgia,'Times New Roman',serif;
  font-size:clamp(22px,2.25vw,31px);
  line-height:1.5;
  letter-spacing:-.02em
}
.small {
  font-size:11px;
  color:var(--muted);
  line-height:1.7
}
.timeline {
  list-style:none;
  padding:0;
  margin:45px 0 25px;
  display:grid;
  grid-template-columns:repeat(3,1fr);
  gap:42px 34px;
  counter-reset:history
}
.timeline li {
  padding-top:20px;
  border-top:1px solid var(--line)
}
.year {
  display:block;
  font-size:10px;
  letter-spacing:1.5px;
  color:var(--accent);
  margin-bottom:20px
}
.timeline h3 {
  font-family:Georgia,serif;
  font-size:26px;
  margin-bottom:12px
}
.timeline p {
  font-size:13px;
  color:var(--muted)
}
.section-heading {
  margin-bottom:38px
}
.section-heading.split {
  display:grid;
  grid-template-columns:1.2fr 1fr;
  align-items:end;
  gap:9vw
}
.section-heading.split>p {
  font-size:15px;
  color:var(--muted);
  max-width:440px
}
.lab-grid {
  display:grid;
  grid-template-columns:1.55fr 1fr;
  border:1px solid var(--line)
}
.orbit-wrap {
  background:var(--dark);
  display:flex;
  align-items:center;
  justify-content:center;
  min-width:0
}
.orbit-wrap>svg,.orbit-wrap>img {
  width:100%;
  height:auto
}
.control-panel {
  padding:32px;
  background:#efefe3;
  font-size:13px
}
.control-panel>label,.label-line label {
  font-size:11px;
  letter-spacing:.4px
}
.label-line {
  display:flex;
  justify-content:space-between;
  align-items:center;
  gap:12px;
  margin-top:22px;
  margin-bottom:9px
}
.label-line output {
  font-size:12px;
  font-variant-numeric:tabular-nums
}
.control-panel select {
  width:100%;
  padding:12px 10px;
  background:transparent;
  border:1px solid #9cafa2;
  margin:9px 0 7px;
  color:var(--ink)
}
input[type=range] {
  width:100%;
  accent-color:var(--accent);
  cursor:pointer;
  margin:10px 0;
  min-height:22px
}
.hint {
  font-size:10px;
  color:var(--muted);
  line-height:1.65
}
.button-row {
  display:flex;
  gap:12px;
  margin:16px 0 25px
}
.button-row button {
  border:1px solid #a5b6a7;
  padding:10px 15px;
  background:transparent;
  color:var(--ink);
  font-size:12px
}
.button-row button:first-child {
  background:var(--ink);
  border-color:var(--ink);
  color:var(--paper)
}
.readouts {
  margin:22px 0;
  font-variant-numeric:tabular-nums
}
.readouts>div {
  display:flex;
  justify-content:space-between;
  gap:14px;
  padding:11px 0;
  border-bottom:1px solid #d1d8c9
}
.readouts dt {
  font-size:11px;
  line-height:1.5
}
.readouts dd {
  font-size:15px;
  margin:0
}
.readouts .emphasis {
  display:block
}
.readouts .emphasis dd {
  font-family:Georgia,serif;
  font-size:38px;
  color:var(--accent);
  margin-top:8px
}
.note {
  border-left:2px solid var(--gold);
  padding-left:14px;
  font-size:12px;
  line-height:1.7
}
.text-button {
  background:none;
  border:0;
  border-bottom:1px solid var(--accent);
  color:var(--accent);
  padding:5px 0;
  font-size:11px
}
.data-details {
  border:1px solid var(--line);
  border-top:0;
  padding:18px 22px;
  font-size:12px
}
summary {
  cursor:pointer;
  line-height:1.6
}
.table-wrap {
  overflow:auto
}
table {
  width:100%;
  border-collapse:collapse;
  margin:15px 0;
  font-variant-numeric:tabular-nums
}
th,td {
  padding:11px;
  text-align:right;
  border-bottom:1px solid var(--line);
  font-size:12px
}
th:first-child,td:first-child {
  text-align:left
}
caption {
  text-align:left;
  line-height:1.7;
  font-size:11px;
  color:var(--muted);
  padding:12px 0
}
.bound-panel {
  padding:24px;
  border:1px solid var(--line)
}
#bound-chart svg,#bound-chart img {
  width:100%;
  max-width:940px;
  margin:auto
}
.bound-controls {
  display:grid;
  grid-template-columns:1fr 1fr 1fr;
  gap:40px;
  align-items:end;
  margin:20px 0
}
.bound-controls strong {
  display:block;
  font-size:26px;
  font-weight:400;
  white-space:nowrap;
  margin:18px 0
}
.paper-grid {
  display:grid;
  grid-template-columns:repeat(3,1fr);
  gap:36px
}
.paper-grid article {
  border-top:1px solid var(--line);
  padding-top:24px
}
.paper-grid p {
  font-size:13px;
  color:var(--muted)
}
.paper-grid a {
  font-size:12px;
  line-height:1.7
}
.paper-scope {
  margin-top:40px;
  padding:19px 0;
  border-top:1px solid var(--line);
  font-size:12px
}
.paper-scope p {
  max-width:800px;
  margin-top:15px
}
.future {
  background:#e9ece0;
  margin-top:25px;
  padding:70px 55px
}
.future .large-copy {
  max-width:780px
}
.future-grid {
  display:grid;
  grid-template-columns:repeat(3,1fr);
  gap:35px;
  margin:45px 0 25px
}
.future-grid span {
  font-family:Georgia,serif;
  color:var(--accent);
  font-size:28px
}
.future-grid h3 {
  margin-top:22px
}
.future-grid p {
  font-size:13px;
  color:var(--muted)
}
.references ol {
  padding-left:20px;
  font-size:13px;
  line-height:1.8
}
.references h2 {
  font-size:38px
}
.references>p {
  max-width:850px;
  font-size:12px
}
footer {
  max-width:1300px;
  margin:auto;
  border-top:1px solid var(--line);
  padding:40px;
  display:flex;
  justify-content:space-between;
  gap:30px;
  align-items:center
}
footer p {
  font-family:Georgia,serif;
  font-size:17px;
  line-height:1.5
}
footer>span {
  font-size:9px;
  letter-spacing:1.5px;
  line-height:1.8;
  color:var(--muted)
}
.skip-link {
  position:absolute;
  left:15px;
  top:-100px;
  background:var(--ink);
  color:white;
  padding:15px;
  z-index:3
}
.skip-link:focus {
  top:15px
}
.sr-only {
  position:absolute;
  width:1px;
  height:1px;
  overflow:hidden;
  clip:rect(0,0,0,0);
  white-space:nowrap
}
.noscript-note {
  padding:20px;
  text-align:center
}
.hidden,[hidden] {
  display:none!important
}
@media(max-width:900px) {
  .site-header {
    padding:0 25px
  }
  .site-header nav {
    gap:16px;
    font-size:11px
  }
  .hero {
    grid-template-columns:1fr;
    padding:55px 35px;
    gap:40px
  }
  .hero-copy {
    max-width:680px
  }
  .hero-plate {
    max-width:650px;
    width:100%;
    justify-self:center
  }
  .section {
    padding:60px 30px
  }
  .dedication {
    grid-template-columns:1fr;
    gap:10px
  }
  .lab-grid {
    grid-template-columns:1.25fr 1fr
  }
  .control-panel {
    padding:22px
  }
  .section-heading.split {
    gap:35px
  }
  .bound-controls {
    gap:24px
  }
  .paper-grid,.future-grid {
    gap:25px
  }
}
@media(max-width:620px) {
  .site-header {
    height:auto;
    min-height:100px;
    align-items:flex-start;
    padding:22px 22px 18px;
    gap:22px
  }
  .wordmark {
    font-size:25px
  }
  .site-header nav {
    display:grid;
    grid-template-columns:1fr 1fr;
    gap:14px 17px;
    font-size:10px
  }
  .hero {
    padding:45px 23px 55px
  }
  .hero-plate {
    box-shadow:9px 9px 0 #e9e7db
  }
  .hero-plate figcaption {
    flex-direction:column;
    gap:5px
  }
  .section {
    padding:50px 23px
  }
  .timeline {
    grid-template-columns:1fr 1fr;
    gap:22px
  }
  .section-heading.split {
    grid-template-columns:1fr;
    gap:5px
  }
  .section-heading.split h2 {
    margin-bottom:15px
  }
  .lab-grid {
    grid-template-columns:1fr
  }
  .control-panel {
    padding:26px
  }
  .bound-controls {
    grid-template-columns:1fr;
    gap:5px
  }
  .bound-panel {
    padding:13px
  }
  .bound-controls>div:last-child {
    padding-top:20px
  }
  .paper-grid,.future-grid {
    grid-template-columns:1fr;
    gap:30px
  }
  .future {
    margin:20px 14px;
    padding:40px 25px
  }
  .future-grid {
    margin-top:30px
  }
  footer {
    padding:30px 23px;
    flex-wrap:wrap
  }
  footer>span {
    width:100%
  }
  .eyebrow {
    line-height:1.8
  }
}
@media(prefers-reduced-motion:reduce) {
  html {
    scroll-behavior:auto
  }
  * {
    animation:none!important;
    transition:none!important
  }
}
/* Reading hierarchy and usable controls across screen sizes. */
body {
  font-size: 16px;
  line-height: 1.65;
}
main {
  min-width: 0;
}
main:focus {
  outline: none;
}
.section {
  scroll-margin-top: 24px;
}
.section-heading p {
  max-width: 62ch;
}
.site-header {
  height: auto;
  min-height: 100px;
  gap: 24px;
}
.site-header nav {
  flex-wrap: wrap;
  font-size: 14px;
  gap: 8px 24px;
}
.site-header nav a {
  display: inline-flex;
  align-items: center;
  min-height: 44px;
}
.site-header nav a:hover {
  text-decoration-thickness: 2px;
  text-underline-offset: 6px;
}
.hero {
  padding-top: 72px;
  padding-bottom: 72px;
}
.hero-plate img {
  height: auto;
}
.edition {
  font-size: 13px;
  line-height: 1.6;
}
.eyebrow {
  font-size: 12px;
  line-height: 1.7;
  letter-spacing: 1.6px;
}
.small, .hint, .note {
  font-size: 13px;
  line-height: 1.75;
}
.research-guide {
  padding-top: 52px;
  padding-bottom: 52px;
}
.research-guide h2 {
  font-size: clamp(32px, 3.4vw, 48px);
}
.reading-route {
  list-style: none;
  margin: 0 0 24px;
  padding: 0;
}
.reading-route li {
  border-top: 1px solid var(--line);
}
.reading-route li:last-child {
  border-bottom: 1px solid var(--line);
}
.reading-route a {
  display: grid;
  grid-template-columns: 42px 1fr auto;
  align-items: center;
  gap: 18px;
  padding: 20px 12px;
  text-decoration: none;
}
.reading-route a:hover {
  background: #e9ece0;
}
.route-number {
  color: var(--accent);
  font-family: Georgia, serif;
  font-size: 24px;
}
.reading-route strong {
  display: block;
  font-size: 17px;
  margin-bottom: 3px;
}
.reading-route strong + span {
  color: var(--muted);
  font-size: 14px;
}
.scope-note {
  padding: 18px 22px;
  margin: 0;
  border-left: 3px solid var(--accent);
  background: #e9ece0;
  font-size: 14px;
}
.timeline p, .paper-grid p, .future-grid p, .references ol {
  font-size: 15px;
}
.paper-grid a, .paper-scope, .references > p {
  font-size: 14px;
}
.control-panel {
  font-size: 14px;
}
.control-panel > label, .label-line label, .readouts dt {
  font-size: 13px;
}
.label-line output {
  font-size: 14px;
}
.button-row {
  flex-wrap: wrap;
}
.button-row button, .text-button, summary {
  min-height: 44px;
}
.button-row button {
  padding: 11px 18px;
  font-size: 14px;
}
.text-button {
  text-align: left;
  font-size: 14px;
  line-height: 1.5;
  padding: 10px 0;
}
input[type=range] {
  min-height: 44px;
}
select {
  min-height: 44px;
}
.readouts dd {
  font-size: 17px;
}
.data-details, th, td, caption {
  font-size: 14px;
}
.table-wrap:focus-visible {
  outline-offset: -3px;
}
#export-status:empty {
  display: none;
}
button:focus-visible, input:focus-visible, select:focus-visible, summary:focus-visible, a:focus-visible, .table-wrap:focus-visible {
  outline: 3px solid #765126;
  outline-offset: 4px;
}
footer > span {
  font-size: 11px;
  line-height: 1.8;
}
.equation-card {
  margin-top: 42px;
  padding: 36px;
  border: 1px solid var(--line);
  background: #eeeee2;
}
.formula-intro {
  max-width: 650px;
  margin: 0 auto 28px;
  text-align: center;
}
.formula-intro h3 {
  font-family: Georgia, serif;
  font-size: clamp(28px, 3vw, 38px);
  font-weight: 400;
}
.formula-intro p {
  font-size: 15px;
}
.formula-family {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 14px;
  padding: 20px 0;
  border-top: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
}
math {
  font-family: 'STIX Two Math', 'Cambria Math', 'Latin Modern Math', math;
  font-size: clamp(23px, 2.6vw, 33px);
  color: var(--ink);
}
.formula-direction {
  display: flex;
  justify-content: center;
  align-items: center;
  flex-wrap: wrap;
  gap: 18px 40px;
  margin: 30px 0;
}
.formula-direction math {
  font-size: clamp(20px, 2.3vw, 28px);
}
.formula-speed {
  display: flex;
  justify-content: center;
  align-items: center;
  flex-wrap: wrap;
  gap: 20px 40px;
  padding: 22px 0 30px;
}
.formula-label {
  max-width: 150px;
  color: var(--muted);
  font-size: 14px;
  line-height: 1.6;
}
.symbol-key {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 16px 35px;
  border-top: 1px solid var(--line);
  padding-top: 24px;
  margin: 0;
}
.symbol-key > div {
  display: grid;
  grid-template-columns: 32px 1fr;
  gap: 12px;
}
.symbol-key dt {
  font: italic 24px Georgia, serif;
  color: var(--accent);
}
.symbol-key dd {
  margin: 0;
  font-size: 14px;
  line-height: 1.6;
}
.equation-card .formula-context {
  max-width: 72ch;
  font-size: 13px;
  margin: 25px 0 0;
  color: var(--muted);
}
@media (max-width: 900px) {
  .lab-grid {
    grid-template-columns: 1fr;
  }
  .orbit-wrap > svg, .orbit-wrap > img {
    max-width: 760px;
  }
  .hero {
    padding-top: 48px;
    padding-bottom: 56px;
  }
}
@media (max-width: 620px) {
  .site-header {
    flex-direction: column;
    align-items: stretch;
    gap: 12px;
  }
  .site-header nav {
    display: grid;
    grid-template-columns: 1fr 1fr;
    font-size: 14px;
    gap: 0 18px;
  }
  .hero h1 {
    font-size: clamp(41px, 10vw, 62px);
  }
  .reading-route a {
    grid-template-columns: 28px 1fr 16px;
    gap: 10px;
    padding: 18px 4px;
  }
  .reading-route strong {
    font-size: 16px;
  }
  .scope-note {
    padding: 16px;
  }
  .timeline {
    grid-template-columns: 1fr;
  }
  .control-panel {
    padding: 24px 20px;
  }
  .equation-card {
    padding: 24px 16px;
  }
  .formula-family {
    grid-template-columns: 1fr;
    gap: 12px;
  }
  .formula-direction {
    gap: 16px;
  }
  .formula-speed {
    text-align: center;
  }
  .formula-label {
    max-width: none;
    width: 100%;
  }
  .symbol-key {
    grid-template-columns: 1fr;
  }
}
@media (forced-colors: active) {
  .reading-route a, .scope-note, .button-row button {
    border: 1px solid CanvasText;
  }
}
/* Epoch 009: a reading room around an illuminated mathematical instrument.
   Color roles and authored timing choices are recorded in docs/design-tokens.json. */
h1 { font-size: clamp(54px,6.4vw,94px); }
.site-header { min-height: 112px; }
.hero { grid-template-columns: minmax(0,1.02fr) minmax(0,1fr); padding-top: 88px; padding-bottom: 96px; }
.lead { max-width: 43ch; }
.button { font-size: 14px; border-radius: 3px; transition: background-color var(--fade); }
.button.dark { background: var(--accent); color: var(--paper); border-color: var(--accent); }
.button.dark:hover { background: var(--ink); }
.hero-plate { background: var(--dark); color: var(--on-dark); padding: 12px; border-radius: 4px; box-shadow: 14px 18px 0 var(--tint); }
.hero-plate figcaption { font-size: 12px; color: var(--on-dark); background: var(--dark); padding: 14px; line-height: 1.7; }
.section { padding-top: 76px; padding-bottom: 76px; }
.section-heading.split { grid-template-columns: minmax(0,1.1fr) minmax(0,1fr); }
.section-heading.split > p { color: var(--muted); font-size: 17px; }
.reading-route a { transition: background-color var(--fade); }
.reading-route a:hover, .scope-note { background: var(--tint); }
.dedication { background: var(--dark); color: var(--on-dark); }
.dedication h2 { color: var(--paper); }
.dedication em { color: var(--body-1); }
.dedication .eyebrow, .dedication .small { color: var(--on-dark); }
.timeline h3 { font: 26px Georgia,serif; }
.lab-grid { grid-template-columns: minmax(0,1.45fr) minmax(0,1fr); border-radius: 4px; overflow: hidden; }
.orbit-wrap { background: var(--dark); min-width: 0; }
.control-panel { background: #f0f2e8; min-width: 0; }
select { background: var(--paper); border-color: var(--muted); color: var(--ink); }
input[type=range] { accent-color: var(--accent); }
.button-row { gap: 9px; }
.button-row button { padding: 10px 14px; border-radius: 3px; border-color: var(--muted); transition: background-color var(--fade); }
.button-row button:first-child { background: var(--accent); border-color: var(--accent); color: var(--paper); }
.button-row button:hover { background: var(--tint); color: var(--ink); }
.button-row button:disabled { cursor: default; border-style: dashed; }
.text-button { color: var(--accent); border-bottom: 1px solid var(--accent); }
.readouts .emphasis dd { color: var(--body-2-ink); }
.body-legend { display: grid; grid-template-columns: repeat(3,minmax(0,1fr)); gap: 24px; list-style: none; padding: 24px 0; margin: 0; }
.body-legend li { display: flex; align-items: center; gap: 12px; font-size: 13px; }
.body-legend strong { display: block; font-size: 15px; }
.body-legend strong + span { display: block; color: var(--muted); }
.body-dot { display: inline-grid; place-items: center; flex-shrink: 0; width: 32px; height: 32px; border-radius: 50%; font-weight: 700; color: var(--dark); }
[data-body-label="1"] { color: var(--body-1-ink); }
[data-body-label="2"] { color: var(--body-2-ink); }
[data-body-label="3"] { color: var(--body-3-ink); }
[data-body-label="1"] .body-dot { background: var(--body-1); }
[data-body-label="2"] .body-dot { background: var(--body-2); }
[data-body-label="3"] .body-dot { background: var(--body-3); }
.equation-card { margin-top: 48px; padding: 42px; background: #f3f0e4; border-radius: 4px; }
.formula-intro h3 { font-size: clamp(30px,3vw,42px); }
.equation-reading { border: 0; margin: 0; padding: 0; text-align: center; }
.equation-reading legend { width: 100%; font-size: 13px; color: var(--muted); margin-bottom: 12px; }
.equation-reading > div { display: flex; justify-content: center; flex-wrap: wrap; gap: 8px; }
.equation-reading button { padding: 10px 18px; min-height: 44px; font-size: 14px; color: var(--accent); background: transparent; border: 1px solid var(--muted); border-radius: 30px; transition: background-color var(--fade); }
.equation-reading button[aria-pressed=true] { background: var(--accent); color: var(--paper); border-color: var(--accent); }
.equation-note { max-width: 66ch; min-height: 4em; margin: 22px auto 24px; text-align: center; font-size: 15px; color: var(--muted); }
[data-formula] { border: 1px solid transparent; border-radius: 4px; padding: 25px 15px; transition: background-color var(--fade), border-color var(--fade); }
.equation-card[data-reading=shape] [data-formula=shape],
.equation-card[data-reading=direction] [data-formula=direction],
.equation-card[data-reading=rhythm] [data-formula=rhythm] { background: var(--paper); border-color: var(--line); }
.formula-family { grid-template-columns: repeat(3,minmax(0,1fr)); gap: 12px; align-items: center; }
math { font-size: clamp(25px,2.7vw,36px); }
.formula-direction, .formula-speed { gap: 24px 40px; margin: 16px 0 0; }
.formula-direction math { font-size: clamp(21px,2.4vw,29px); }
.symbol-key { margin-top: 30px; }
.future { background: var(--tint); }
button:focus-visible, input:focus-visible, select:focus-visible, summary:focus-visible, a:focus-visible, .table-wrap:focus-visible { outline-color: var(--body-2-ink); }
@media (max-width: 1000px) {
  .hero { padding-top: 60px; padding-bottom: 64px; grid-template-columns: 1fr; gap: 42px; }
  .hero-copy { max-width: 700px; }
  .hero-plate { max-width: 720px; width: 100%; justify-self: center; }
  .lab-grid { grid-template-columns: 1fr; }
}
@media (max-width: 700px) {
  .site-header { flex-direction: column; align-items: stretch; gap: 15px; padding: 24px; }
  .site-header nav { display: grid; grid-template-columns: 1fr 1fr; gap: 0 18px; }
  .hero { padding: 48px 24px 62px; }
  .hero h1 { font-size: clamp(43px,10vw,66px); }
  .hero-plate { box-shadow: 7px 10px 0 var(--tint); padding: 5px; }
  .hero-plate figcaption { flex-direction: column; gap: 3px; }
  .section { padding: 52px 24px; }
  .section-heading.split, .dedication { grid-template-columns: 1fr; gap: 12px; }
  .control-panel { padding: 26px 20px; }
  .body-legend { gap: 12px; }
  .body-legend li { align-items: flex-start; gap: 8px; }
  .body-dot { width: 25px; height: 25px; }
  .body-legend strong { font-size: 14px; }
  .equation-card { padding: 30px 15px; }
  .equation-reading button { padding: 10px 12px; }
  .formula-family { grid-template-columns: 1fr; gap: 20px; }
  .formula-label { max-width: none; width: 100%; text-align: center; }
  .symbol-key { grid-template-columns: 1fr; }
}
@media (max-width: 390px) {
  .body-legend { grid-template-columns: 1fr; gap: 14px; }
  [data-formula] { padding-left: 5px; padding-right: 5px; }
}
@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after { animation: none !important; transition: none !important; }
}
@media (forced-colors: active) {
  .body-dot { border: 1px solid CanvasText; }
  .equation-reading button[aria-pressed=true] { outline: 2px solid Highlight; }
}
@media print {
  .equation-reading { display: none; }
  .dedication, .dedication h2, .dedication em, .dedication .eyebrow, .dedication .small { background: white; color: black; }
  .site-header nav,.button-row,.text-button,input,select {
    display:none
  }
  .hero,.section {
    padding:25px 0
  }
  .hero,.lab-grid,.section-heading.split {
    display:block
  }
  .orbit-wrap {
    max-width:500px;
    margin:auto
  }
  .hero-plate {
    max-width:400px
  }
  .control-panel {
    background:white
  }
  .future {
    background:white
  }
  body {
    background:white
  }
  .site-header {
    padding:0
  }
  .section {
    break-inside:avoid
  }
  a {
    color:black
  }
}