:root {
  color-scheme: dark;
  --bg: #090e1d;
  --card: #10192b;
  --line: #2b3850;
  --ink: #f4f1e9;
  --muted: #a9b7ca;
  --mint: #79e5c2;
  --violet: #bc9cff;
  --gold: #ffd286;
  --red: #ff929e;
  --display: Georgia, "Times New Roman", serif;
  --body: -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
}
* { box-sizing: border-box; }
html { scroll-behavior: smooth; scroll-padding-top: 20px; }
body { margin: 0; background: var(--bg); color: var(--ink); font: 15px/1.65 var(--body); -webkit-font-smoothing: antialiased; }
::selection { background: #346957; color: white; }
button, input, select { font: inherit; }
a { color: var(--mint); text-underline-offset: 4px; text-decoration-thickness: 1px; }
a:hover { color: #bbf8e5; }
button, select { color: var(--ink); background: #19243a; border: 1px solid #40506a; border-radius: 7px; padding: 10px 13px; cursor: pointer; line-height: 1.45; }
button { transition: background .15s ease, border-color .15s ease; }
button:hover { border-color: #73849f; background: #24324c; }
button:active { background: #2f405b; }
button.active { background: #213e3d; border-color: var(--mint); color: #ddfff4; }
button:disabled { opacity: .5; cursor: not-allowed; }
:focus-visible { outline: 3px solid var(--mint); outline-offset: 5px; }
#app:focus { outline: none; }
.skip-link { position: absolute; top: 8px; left: 16px; z-index: 100; padding: 10px 18px; background: var(--mint); color: #0a2520; border-radius: 6px; transform: translateY(-160%); }
.skip-link:focus { transform: translateY(0); color: #0a2520; }
.site-header, #nav, main, .site-footer { max-width: 1416px; margin-inline: auto; padding-inline: 48px; }
.site-header { padding-top: 23px; }
.masthead { display: flex; align-items: center; justify-content: space-between; padding-bottom: 17px; border-bottom: 1px solid var(--line); }
.eskalar-wordmark { display: inline-flex; align-items: center; gap: 8px; color: var(--ink); text-decoration: none; font-size: 22px; font-weight: 620; letter-spacing: -.8px; }
.eskalar-wordmark svg { width: 25px; height: 24px; color: var(--mint); margin-right: 3px; }
.wordmark-ai { color: var(--muted); font-size: 15px; font-weight: 400; letter-spacing: -.5px; margin-left: -7px; padding-top: 4px; }
.masthead-caption { color: var(--muted); font-size: 12px; }
.brand-row { display: flex; justify-content: space-between; gap: 24px; align-items: center; padding: 26px 0 29px; }
.brand { display: flex; align-items: center; gap: 22px; }
.logo { width: 70px; height: 70px; display: grid; place-items: center; position: relative; flex: 0 0 70px; }
.logo span { font: italic 51px/1 var(--display); color: var(--mint); padding: 0 7px 7px 0; }
.logo svg { position: absolute; inset: 0; width: 100%; height: 100%; fill: none; stroke: #4b7e75; stroke-width: 1; }
.logo .orbit-point { fill: var(--mint); stroke: var(--bg); stroke-width: 2; }
h1 { font: 48px/1.1 var(--display); letter-spacing: -1.7px; margin: 0; }
.brand p { margin: 7px 0 0; color: var(--muted); font-size: 14px; }
.learning-invitation { text-align: right; font-size: 13px; color: var(--muted); }
.badge { display: inline-flex; align-items: center; gap: 8px; margin-top: 9px; color: var(--mint); font-size: 12px; border-radius: 4px; }
.badge::before { content: ''; width: 6px; height: 6px; border-radius: 50%; background: currentColor; }
.learning-invitation > span { display: block; }
#nav { display: grid; grid-template-columns: repeat(4, minmax(0, 1fr)); gap: 0; padding-bottom: 0; }
#nav button { position: relative; text-align: left; border-radius: 0; border: 0; border-bottom: 2px solid var(--line); background: transparent; padding: 15px 20px 16px; font-size: 15px; font-weight: 570; min-height: 82px; }
#nav button:first-child { padding-left: 0; }
#nav button + button::before { content: ''; position: absolute; left: 0; top: 18px; bottom: 20px; width: 1px; background: var(--line); }
#nav button.active { border-bottom-color: var(--mint); background: linear-gradient(0deg, #17342e66, transparent 90%); color: var(--mint); }
#nav button:hover { background: #142033; }
#nav small { display: block; color: var(--muted); font-size: 11px; font-weight: 400; margin-bottom: 5px; letter-spacing: .15px; }
#nav button.active small { color: #bbd2c9; }
main { padding-top: 31px; padding-bottom: 50px; }
.hero { margin: 0 0 21px; display: flex; justify-content: space-between; gap: 20px; align-items: end; }
.hero h2 { font: 36px/1.2 var(--display); letter-spacing: -.7px; margin: 6px 0 8px; max-width: 1000px; }
.hero p { margin: 0; color: var(--muted); font-size: 15px; max-width: 85ch; }
.eyebrow { color: var(--mint); font-size: 12px; letter-spacing: .1px; }
.stage { display: flex; flex-wrap: wrap; gap: 7px; margin: 0 0 24px; }
.stage button { font-size: 12px; padding: 9px 14px; border-radius: 5px; background: transparent; border-color: #35425a; }
.stage button:hover { background: #19273b; }
.stage button.active { background: #173831; border-color: #699d8e; color: #d8fff2; }
.layout { display: grid; grid-template-columns: 298px minmax(0, 1fr); gap: 26px; align-items: start; }
.layout > *, .explain > *, .panel { min-width: 0; }
.panel { background: var(--card); border: 1px solid var(--line); border-radius: 10px; padding: 23px; }
.controls { padding: 22px; background: #10182a; border-color: #2b394f; border-radius: 10px 10px 4px 4px; }
.controls h3 { margin: 0 0 19px; color: var(--ink); font-size: 15px; line-height: 1.4; font-weight: 610; }
.control { margin: 21px 0; }
.control label { display: flex; justify-content: space-between; align-items: center; gap: 12px; color: #c6d1e2; font-size: 12px; line-height: 1.55; }
.control output { color: var(--gold); font-size: 12px; font-weight: 560; text-align: right; font-variant-numeric: tabular-nums; flex-shrink: 0; max-width: 54%; }
input[type=range] { display: block; width: 100%; height: 25px; margin: 9px 0 0; padding: 0; background: transparent; accent-color: var(--mint); cursor: pointer; -webkit-appearance: none; appearance: none; }
input[type=range]::-webkit-slider-runnable-track { height: 3px; border-radius: 2px; background: #40516a; }
input[type=range]::-moz-range-track { height: 3px; border-radius: 2px; background: #40516a; }
input[type=range]::-webkit-slider-thumb { -webkit-appearance: none; width: 15px; height: 15px; margin-top: -6px; border-radius: 50%; background: var(--mint); border: 2px solid #142b2b; box-shadow: 0 0 0 1px var(--mint); }
input[type=range]::-moz-range-thumb { width: 12px; height: 12px; border-radius: 50%; background: var(--mint); border: 2px solid #142b2b; box-shadow: 0 0 0 1px var(--mint); }
input[type=range]:hover::-webkit-slider-thumb { background: #b7ffe8; }
input[type=checkbox] { width: 17px; height: 17px; margin: 0; accent-color: var(--mint); flex-shrink: 0; }
.control label:has(input[type=checkbox]) { justify-content: flex-start; gap: 10px; align-items: start; cursor: pointer; }
.control label:has(input[type=checkbox]) input { margin-top: 1px; }
select { width: 100%; max-width: 100%; margin-top: 7px; font-size: 12px; padding: 10px; white-space: normal; }
.small { font-size: 12px; color: var(--muted); }
.controls p { line-height: 1.7; }
.controls > p:last-child { margin-bottom: 0; }
.controls hr { border: 0; border-top: 1px solid var(--line); margin: 24px 0; }
.action { background: #285547; border-color: #679d8a; color: #ebfff6; }
.action:hover { background: #356c5b; border-color: #a4dfca; }
.transport { display: flex; gap: 7px; margin-top: 20px; }
.transport button { flex: 1; font-size: 12px; min-height: 42px; padding: 9px 8px; }
.reference-banner { display: flex; justify-content: space-between; align-items: center; flex-wrap: wrap; gap: 8px; border-left: 3px solid var(--mint); background: #142a2a; padding: 12px 16px; margin: 0 0 16px; color: #d2e9e2; font-size: 13px; border-radius: 0 6px 6px 0; }
.reference-banner strong { color: var(--mint); font-size: 14px; font-variant-numeric: tabular-nums; }
.observer-strip { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 16px; margin-bottom: 18px; }
.observer-strip.three { grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 12px; }
.person-card { background: #121d30; border: 1px solid #2c3a51; border-top: 2px solid var(--person); border-radius: 3px 3px 9px 9px; padding: 15px; min-width: 0; }
.person-top { display: flex; align-items: center; gap: 16px; }
.portrait { width: 70px; flex: 0 0 70px; align-self: flex-end; }
.portrait svg { display: block; width: 100%; }
.person-copy { min-width: 0; overflow-wrap: anywhere; }
.person-name { color: var(--person); font-size: 14px; font-weight: 600; }
.person-copy .small { font-size: 11px; }
.person-age { display: block; font-size: 25px; letter-spacing: -.7px; line-height: 1.5; font-weight: 600; font-variant-numeric: tabular-nums; }
.person-offset { font-size: 11px; color: var(--gold); line-height: 1.55; margin-top: 2px; }
.heartbeat-row { display: flex; align-items: center; gap: 12px; border-top: 1px solid #2c3a51; padding-top: 13px; margin-top: 13px; }
.heart { width: 25px; flex: 0 0 25px; transform-origin: center; }
.heartbeat-row > div { min-width: 0; overflow-wrap: anywhere; }
.heartbeat-row b { display: block; font-size: 13px; color: var(--person); font-weight: 550; }
.heartbeat-row span { display: block; font-size: 11px; color: var(--muted); line-height: 1.6; font-variant-numeric: tabular-nums; }
.visual { padding: 0; overflow: hidden; position: relative; border-color: #33425c; border-radius: 9px; background: #0b1223; }
canvas { display: block; width: 100%; height: auto; touch-action: pan-y; }
.canvas-caption { padding: 12px 17px; font-size: 11px; color: var(--muted); border-top: 1px solid #25334a; line-height: 1.6; }
.metrics { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 0; margin-top: 20px; border-bottom: 1px solid var(--line); padding-bottom: 17px; }
.metric { min-width: 0; padding: 0 20px; }
.metric:first-child { padding-left: 0; }
.metric + .metric { border-left: 1px solid var(--line); }
.metric span { display: block; color: var(--muted); font-size: 10px; line-height: 1.6; letter-spacing: .25px; }
.metric strong { display: block; color: var(--mint); font-size: 30px; font-weight: 550; letter-spacing: -.9px; line-height: 1.65; font-variant-numeric: tabular-nums; overflow-wrap: anywhere; }
.metric:nth-child(2) strong { color: var(--violet); }
.metric:nth-child(3) strong { color: var(--gold); }
.metric b { display: block; font-size: 11px; font-weight: 400; color: var(--muted); line-height: 1.5; }
.note { margin-top: 18px; border-left: 2px solid #be975a; padding: 12px 16px; background: #262635; border-radius: 0 6px 6px 0; color: #e9e0ce; font-size: 13px; line-height: 1.75; }
.explain { display: grid; grid-template-columns: 1fr 1fr; gap: 30px; margin-top: 38px; border-top: 1px solid var(--line); padding-top: 29px; }
.explain > .panel { background: transparent; border: 0; border-radius: 0; padding: 0; }
.explain > .panel + .panel { border-left: 1px solid var(--line); padding-left: 30px; }
.explain h3 { font: 24px/1.3 var(--display); margin: 0 0 16px; letter-spacing: -.25px; }
.explain p { font-size: 14px; color: #bdc9dc; line-height: 1.8; max-width: 78ch; }
.explain p b { color: #e7e9ec; font-weight: 600; }
.eq { background: #101a2c; border: 1px solid #2d3b54; border-radius: 6px; padding: 15px 18px; font: 16px/1.85 var(--display); overflow-x: auto; margin: 13px 0; color: #e5d8ff; }
.eq sub, .eq sup { font-size: .72em; }
details { border-top: 1px solid #2b364b; margin-top: 18px; padding-top: 13px; }
summary { cursor: pointer; color: var(--mint); font-size: 13px; line-height: 1.65; padding: 3px 0; }
summary::marker { color: #87b8ab; font-size: .8em; }
details[open] summary { margin-bottom: 9px; }
.quiz { margin-top: 32px; padding: 26px 29px 20px; background: #14242c; border: 1px solid #3c5958; border-radius: 8px; }
.quiz h3 { font: 25px/1.4 var(--display); margin: 7px 0 18px; max-width: 900px; }
.quiz button { margin: 0 8px 8px 0; font-size: 13px; text-align: left; background: #192d39; border-color: #4d6870; padding: 11px 15px; }
.quiz button:hover { border-color: var(--mint); background: #244741; }
.feedback { min-height: 24px; margin-top: 6px; font-size: 13px; color: var(--gold); }
.sources { display: flex; align-items: baseline; flex-wrap: wrap; gap: 10px 20px; margin-top: 29px; padding-top: 18px; border-top: 1px solid var(--line); color: var(--muted); font-size: 12px; }
.sources b { color: #e2e8ed; font-weight: 500; margin-right: 4px; }
.sources a { color: #acccc3; }
.legend { display: flex; flex-wrap: wrap; gap: 18px; font-size: 12px; color: var(--muted); }
.legend-chip { display: inline-flex; gap: 7px; align-items: center; }
.legend-chip::before { content: ''; width: 8px; height: 8px; border-radius: 50%; background: var(--person); }
.compare-hint { color: var(--muted); font-size: 12px; margin: 9px 0 14px; }
.inline-switches { display: flex; gap: 8px; flex-wrap: wrap; margin: 0 0 13px; }
.inline-switches button { font-size: 12px; }
.acc-readings { display: grid; grid-template-columns: 1fr 1fr; gap: 10px; margin-top: 14px; }
.acc-readings > div { padding: 12px 15px; background: #131e30; border: 1px solid #2e3d52; border-radius: 5px; font-size: 12px; color: var(--muted); }
.acc-readings strong { display: block; color: var(--gold); font-size: 15px; font-weight: 550; margin-top: 3px; }
.direction-box { border-left: 2px solid var(--gold); background: #171f30; padding: 15px 18px; margin: 18px 0; border-radius: 0 6px 6px 0; font-size: 13px; }
.direction-box strong { color: var(--gold); }
.direction-box p { margin: 7px 0; color: #c4ccda; }
.reference-table { overflow-x: auto; margin-top: 17px; max-width: 100%; }
table { width: 100%; border-collapse: collapse; font-size: 12px; }
th, td { text-align: left; border-bottom: 1px solid var(--line); padding: 11px 9px; }
th { color: var(--muted); font-size: 11px; font-weight: 500; }
td { font-variant-numeric: tabular-nums; }
.reference-table table { min-width: 500px; }
.reference-table th { white-space: nowrap; }
.table-points { color: var(--mint); }
.age-note { font-size: 11px; color: var(--muted); }
.spectrum-panel { background: #121b2c; border: 1px solid #33415a; border-radius: 8px; padding: 20px; margin-bottom: 18px; }
.spectrum-heading { display: flex; justify-content: space-between; align-items: center; flex-wrap: wrap; gap: 8px; }
.spectrum-heading h3 { margin: 0; font-size: 16px; font-weight: 570; }
.swatch-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 10px; margin: 16px 0; }
.swatch { display: flex; align-items: center; gap: 12px; padding: 13px; border: 1px solid #39455a; border-radius: 5px; min-width: 0; }
.swatch-dot { width: 30px; height: 30px; border-radius: 50%; border: 1px solid #b8c6db; flex-shrink: 0; }
.swatch strong { display: block; font-size: 18px; font-weight: 550; font-variant-numeric: tabular-nums; }
.swatch span { font-size: 11px; color: var(--muted); }
.spectrum-track { height: 15px; background: linear-gradient(90deg,#716789 0%,#8c6d95 14%,#8044cc 14%,#466dff 27%,#33ccce 39%,#75df59 48%,#f5df63 58%,#f49b52 66%,#e95151 79%,#a23b48 79%,#532538 100%); border-radius: 3px; position: relative; margin: 33px 0 10px; }
.spectrum-marker { position: absolute; top: -9px; height: 34px; border-left: 2px solid white; }
.spectrum-marker i { position: absolute; top: -19px; left: -5px; font-size: 11px; font-style: normal; font-weight: 700; }
.spectrum-labels { display: flex; justify-content: space-between; font-size: 11px; color: var(--muted); }
.spectrum-state { font-size: 13px; color: var(--gold); margin-top: 12px; }
.spectrum-panel .small { margin: 9px 0 0; }
.site-footer { display: grid; grid-template-columns: 240px minmax(0, 1fr) auto; gap: 30px; border-top: 1px solid var(--line); padding-top: 26px; padding-bottom: 33px; color: var(--muted); font-size: 11px; }
.footer-title a { font-size: 20px; font-weight: 550; color: var(--ink); letter-spacing: -.5px; text-decoration: none; }
.footer-title span { display: block; margin-top: 4px; }
.site-footer p { margin: 2px 0 0; max-width: 75ch; }
.back-top { align-self: center; white-space: nowrap; color: #adcdc4; }
.noscript-message { max-width: 700px; margin: 30px auto; padding: 24px; background: #202e3a; border: 1px solid var(--gold); }
@media (min-width: 1181px) {
  .observer-strip.three .person-top { align-items: start; gap: 9px; }
  .observer-strip.three .portrait { width: 47px; flex-basis: 47px; align-self: center; }
  .observer-strip.three .person-card { padding: 12px; }
  .observer-strip.three .person-age { font-size: 20px; line-height: 1.65; }
}
@media (max-width: 1180px) {
  .site-header, #nav, main, .site-footer { padding-inline: 30px; }
  .layout { grid-template-columns: 266px minmax(0, 1fr); gap: 20px; }
  .controls { padding: 19px; }
  .person-top { gap: 10px; }
  .portrait { width: 55px; flex-basis: 55px; }
  .person-age { font-size: 21px; }
  .person-card { padding: 12px; }
  .observer-strip.three .person-top { display: block; }
  .observer-strip.three .portrait { width: 52px; margin-bottom: 5px; }
  .observer-strip.three .person-age { font-size: 18px; }
  .metric { padding: 0 13px; }
  .metric strong { font-size: 25px; }
  #nav button { padding-inline: 15px; font-size: 13px; }
  .site-footer { grid-template-columns: 170px minmax(0, 1fr); }
  .back-top { grid-column: 2; }
}
@media (max-width: 850px) {
  .site-header, #nav, main, .site-footer { padding-inline: 23px; }
  .learning-invitation > span { display: none; }
  .brand-row { padding-block: 23px; }
  h1 { font-size: 42px; }
  .hero h2 { font-size: 32px; }
  .layout { grid-template-columns: 230px minmax(0, 1fr); gap: 17px; }
  .controls { padding: 16px; }
  .control label { gap: 6px; font-size: 11px; }
  .control output { font-size: 11px; }
  .person-top { display: block; }
  .portrait { width: 55px; }
  .observer-strip { gap: 10px; }
  .person-name { font-size: 13px; }
  .person-age { font-size: 20px; }
  .metric strong { font-size: 22px; }
  .metric { padding-inline: 9px; }
  .metric span { font-size: 9px; }
  .explain { gap: 23px; }
  .explain > .panel + .panel { padding-left: 23px; }
  .swatch-grid { grid-template-columns: 1fr; }
}
@media (max-width: 700px) {
  .site-header, #nav, main, .site-footer { padding-inline: 18px; }
  .site-header { padding-top: 16px; }
  .masthead { padding-bottom: 13px; }
  .eskalar-wordmark { font-size: 20px; }
  .masthead-caption { font-size: 10px; max-width: 125px; text-align: right; line-height: 1.5; }
  .brand-row { gap: 12px; padding: 22px 0 18px; }
  .brand { gap: 13px; }
  .logo { width: 51px; height: 51px; flex-basis: 51px; }
  .logo span { font-size: 39px; padding-right: 5px; padding-bottom: 6px; }
  h1 { font-size: 37px; letter-spacing: -1.2px; }
  .brand p { font-size: 11px; margin-top: 5px; }
  .badge { font-size: 10px; max-width: 65px; text-align: right; line-height: 1.6; gap: 5px; }
  .badge::before { width: 5px; height: 5px; flex-shrink: 0; }
  #nav { grid-template-columns: 1fr 1fr; column-gap: 13px; }
  #nav button { min-height: 73px; padding: 12px 9px 12px 0; font-size: 13px; line-height: 1.45; }
  #nav button + button::before { display: none; }
  #nav small { font-size: 10px; margin-bottom: 4px; }
  main { padding-top: 24px; padding-bottom: 35px; }
  .hero { margin-bottom: 18px; }
  .hero h2 { font-size: 31px; line-height: 1.22; letter-spacing: -.5px; margin-top: 7px; }
  .hero p { font-size: 13px; line-height: 1.7; }
  .eyebrow { font-size: 11px; }
  .stage { gap: 7px; margin-bottom: 20px; }
  .stage button { font-size: 11px; padding: 9px 11px; min-height: 36px; }
  .layout, .explain { grid-template-columns: minmax(0, 1fr); gap: 21px; }
  .controls { order: 1; padding: 21px; margin-top: 1px; }
  .controls h3 { font-size: 16px; }
  .control label, .control output { font-size: 13px; }
  .control { margin-block: 21px; }
  .controls .small, select { font-size: 12px; }
  .controls input[type=range] { height: 27px; }
  .transport button { min-height: 44px; font-size: 13px; }
  .reference-banner { padding: 11px 13px; margin-bottom: 13px; font-size: 12px; gap: 5px; }
  .reference-banner strong { font-size: 13px; }
  .observer-strip { gap: 10px; margin-bottom: 15px; }
  .person-card { padding: 12px; }
  .person-top { display: block; }
  .portrait { width: 55px; margin-bottom: 5px; }
  .person-name { font-size: 13px; }
  .person-age { font-size: 21px; letter-spacing: -.6px; }
  .person-offset, .person-copy .small { font-size: 10px; }
  .observer-strip.three { grid-template-columns: 1fr; gap: 9px; }
  .observer-strip.three .person-card { display: grid; grid-template-columns: minmax(0, 1.15fr) minmax(0, 1fr); gap: 12px; }
  .observer-strip.three .person-top { display: flex; align-items: center; gap: 9px; }
  .observer-strip.three .portrait { width: 47px; flex-basis: 47px; margin: 0; }
  .observer-strip.three .person-age { font-size: 18px; }
  .observer-strip.three .heartbeat-row { margin: 0; padding: 0 0 0 10px; border-top: 0; border-left: 1px solid #2c3a51; gap: 8px; }
  .observer-strip.three .heart { width: 20px; flex-basis: 20px; }
  .observer-strip.three .heartbeat-row b { font-size: 12px; }
  .observer-strip.three .heartbeat-row span { font-size: 10px; }
  .canvas-caption { padding: 10px 12px; font-size: 10px; }
  .metrics { margin-top: 16px; padding-bottom: 15px; }
  .metric { padding-inline: 10px; }
  .metric strong { font-size: 22px; line-height: 1.8; letter-spacing: -.7px; }
  .metric span { font-size: 9px; letter-spacing: 0; }
  .metric b { font-size: 10px; }
  .note { font-size: 12px; padding: 11px 13px; margin-top: 15px; }
  .explain { margin-top: 28px; padding-top: 25px; }
  .explain > .panel + .panel { padding: 24px 0 0; border-left: 0; border-top: 1px solid var(--line); }
  .explain h3 { font-size: 25px; }
  .explain p { font-size: 13px; line-height: 1.8; }
  .eq { padding: 14px; font-size: 14px; line-height: 1.95; }
  .quiz { padding: 20px; margin-top: 27px; }
  .quiz h3 { font-size: 24px; line-height: 1.35; }
  .quiz button { display: block; width: 100%; margin-right: 0; padding: 12px 13px; }
  .feedback { font-size: 12px; }
  .sources { gap: 11px 18px; font-size: 11px; }
  .sources b { width: 100%; }
  .acc-readings > div { padding: 10px; font-size: 11px; }
  .acc-readings strong { font-size: 13px; }
  .spectrum-panel { padding: 16px; }
  .spectrum-heading h3 { font-size: 15px; }
  .swatch-grid { grid-template-columns: 1fr 1fr; gap: 8px; }
  .swatch { padding: 10px; gap: 8px; }
  .swatch-dot { width: 20px; height: 20px; }
  .swatch strong { font-size: 16px; }
  .swatch span { font-size: 10px; }
  .direction-box { font-size: 12px; }
  .reference-table { padding: 17px; }
  .site-footer { display: block; padding-top: 22px; padding-bottom: 27px; }
  .footer-title { display: flex; align-items: center; gap: 16px; margin-bottom: 13px; }
  .footer-title span { margin: 0; }
  .site-footer p { max-width: 65ch; }
  .back-top { display: inline-block; margin-top: 17px; }
}
@media (max-width: 370px) {
  .site-header, #nav, main, .site-footer { padding-inline: 14px; }
  h1 { font-size: 34px; }
  .learning-invitation { display: none; }
  .hero h2 { font-size: 28px; }
  .observer-strip.three .portrait { width: 37px; flex-basis: 37px; }
  .observer-strip.three .person-card { gap: 8px; padding: 10px; }
  .metric { padding-inline: 7px; }
  .metric strong { font-size: 19px; }
  .swatch-grid { grid-template-columns: 1fr; }
}
@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  button { transition: none; }
  .heart { transform: none !important; }
}
[hidden] { display: none !important; }
.lab-tools { display: flex; justify-content: flex-end; align-items: center; flex-wrap: wrap; gap: 9px; margin: 21px 0 0; }
.lab-tools button { font-size: 11px; padding: 8px 12px; background: transparent; border-color: #405069; }
#toolStatus { color: var(--mint); font-size: 12px; }
.prediction { position: relative; overflow: hidden; padding: 30px 34px; margin: 23px 0 34px; border-color: #425d66; background: #13232f; }
.prediction > small, .prediction > .eyebrow { color: var(--mint); font-size: 12px; }
.prediction h3 { font: 30px/1.3 var(--display); letter-spacing: -.3px; margin: 7px 0 16px; max-width: 850px; }
.prediction p { color: #c8d3df; font-size: 14px; max-width: 80ch; }
.prediction-options { display: flex; flex-wrap: wrap; align-items: stretch; gap: 10px; margin: 22px 0 8px; }
.prediction-options button { flex: 1 1 220px; max-width: 400px; text-align: left; padding: 15px 18px; font-size: 14px; background: #1d3340; border-color: #516d76; }
.prediction-options button:hover { background: #284a4b; border-color: var(--mint); }
.prediction.done { display: flex; flex-wrap: wrap; align-items: baseline; gap: 8px 18px; padding: 13px 18px; margin-block: 16px 22px; border-left: 3px solid var(--mint); border-top: 0; border-bottom: 0; border-right: 0; border-radius: 0 5px 5px 0; background: #14272b; }
.prediction.done h3 { font: 15px/1.6 var(--body); margin: 0; letter-spacing: 0; }
.prediction.done p { font-size: 12px; margin: 0; }
.prediction.done button { font-size: 11px; padding: 6px 9px; }
.next-lab { margin-top: 18px; color: var(--mint); background: #183b34; border-color: #5e9685; }
.guide-note { font-size: 13px; color: #becbdc; max-width: 85ch; margin: 15px 0; padding-left: 13px; border-left: 2px solid #668b87; }
.prediction-diagram { display: block; width: 100%; max-width: 520px; height: auto; margin: 12px 0 19px; }
@media (max-width: 700px) {
  .lab-tools { justify-content: flex-start; gap: 8px; margin-top: 17px; }
  .lab-tools button { min-height: 40px; }
  .prediction { margin-top: 19px; padding: 24px 21px; }
  .prediction h3 { font-size: 26px; }
  .prediction p { font-size: 13px; }
  .prediction-options { display: grid; grid-template-columns: 1fr; margin-top: 20px; }
  .prediction-options button { width: 100%; max-width: none; padding: 14px; font-size: 13px; }
  .prediction.done { padding: 13px 15px; }
  .prediction.done h3 { font-size: 14px; }
  .next-lab { width: 100%; padding-block: 13px; }
}
.prediction:not(.done) { display: grid; grid-template-columns: 190px minmax(0, 1fr); align-items: center; gap: 32px; }
.prediction-visual { width: 100%; max-width: 210px; }
.prediction-visual svg { display: block; width: 100%; height: auto; }
.prediction-copy { min-width: 0; }
.prediction-copy > .small { color: var(--mint); }
.prediction-copy h3 { font-size: 28px; }
.lab-tools > div { display: flex; gap: 8px; flex-wrap: wrap; }
.lab-tools { margin-bottom: 20px; }
.next-lab { display: flex; justify-content: space-between; align-items: center; gap: 25px; margin-top: 28px; padding: 18px 0 0; border: 0; border-top: 1px solid var(--line); background: transparent; color: var(--muted); font-size: 13px; }
.next-lab p { margin: 0; max-width: 65ch; }
.next-lab button { flex-shrink: 0; background: #1e4239; border-color: #568878; font-size: 13px; }
@media (max-width: 700px) {
  .prediction:not(.done) { grid-template-columns: 1fr; gap: 20px; }
  .prediction-visual { max-width: 165px; margin-inline: auto; }
  .prediction-copy h3 { font-size: 26px; }
  .next-lab { display: block; padding-top: 20px; }
  .next-lab button { width: 100%; margin-top: 17px; min-height: 44px; }
  .visual { overflow-x: auto; overscroll-behavior-x: contain; }
  .visual canvas { min-width: 720px; touch-action: pan-x pan-y; }
  .visual::before { content: 'Scroll sideways to explore the full diagram ↔'; display: block; position: sticky; left: 0; width: 100%; color: #b8c8dc; font-size: 10px; padding: 8px 12px; border-bottom: 1px solid var(--line); background: #142036; }
  .canvas-caption { position: sticky; left: 0; width: 100%; }
}