:root {
  --bg:#f6f5f0;
  --surface:#fff;
  --soft:#eeede7;
  --text:#222420;
  --muted:#686b63;
  --line:#dedfd6;
  --accent:#ff6236;
  --violet:#e7ddff;
  --lime:#e8f2c9;
  --peach:#ffe3d5;
  --blue:#dceaf8;
  --radius:22px;
  color-scheme:light
}

[data-theme=dark] {
  --bg:#171a18;
  --surface:#222723;
  --soft:#2d332e;
  --text:#f0f3e9;
  --muted:#b9c2b7;
  --line:#414940;
  --violet:#393048;
  --lime:#323e23;
  --peach:#473126;
  --blue:#243b49;
  color-scheme:dark
}

* {
  box-sizing:border-box
}

html {
  scroll-behavior:smooth;
  scroll-padding-top:100px
}

body {
  margin:0;
  background:var(--bg);
  color:var(--text);
  font-family:Arial,'Apple SD Gothic Neo','Malgun Gothic',sans-serif;
  line-height:1.7;
  word-break:keep-all
}

a {
  color:inherit;
  text-decoration:none
}

button,input,select,textarea {
  font:inherit
}

button,a,input,select,textarea {
  -webkit-tap-highlight-color:transparent
}

button {
  cursor:pointer
}

button:disabled {
  cursor:wait;
  opacity:.6
}

a:focus-visible,button:focus-visible,input:focus-visible,select:focus-visible,textarea:focus-visible {
  outline:3px solid var(--accent);
  outline-offset:4px
}

img,svg {
  max-width:100%
}

[hidden] {
  display:none!important
}

::selection {
  background:#ffcfbe;
  color:#222
}

.skip-link {
  position:fixed;
  top:-100px;
  left:16px;
  z-index:100;
  background:var(--text);
  color:var(--bg);
  padding:12px
}

.skip-link:focus {
  top:10px
}

.site-header {
  position:sticky;
  top:0;
  z-index:30;
  border-bottom:1px solid var(--line);
  background:var(--bg)
}

.site-header-inner,.page-wrap,.site-footer-inner {
  width:min(1160px,calc(100% - 64px));
  margin:auto
}

.site-header-inner {
  min-height:94px;
  display:flex;
  align-items:center;
  gap:26px
}

.brand-lockup {
  display:flex;
  align-items:center;
  gap:12px;
  flex-shrink:0
}

.brand-mark {
  position:relative;
  display:grid;
  place-items:center;
  width:43px;
  height:43px;
  border-radius:13px;
  background:var(--text);
  color:var(--bg);
  font-weight:900;
  font-size:24px;
  transform:rotate(-7deg)
}

.brand-dot {
  position:absolute;
  width:10px;
  height:10px;
  background:var(--accent);
  border:2px solid var(--bg);
  border-radius:50%;
  right:-3px;
  bottom:0
}

.brand-copy strong {
  font-size:26px;
  font-weight:900;
  line-height:1.1;
  letter-spacing:-1.5px
}

.brand-period {
  color:var(--accent)
}

.brand-copy>span {
  display:block;
  color:var(--muted);
  font-size:10px;
  letter-spacing:1px;
  margin-top:4px
}

.main-nav {
  display:flex;
  gap:28px;
  margin-left:auto;
  align-items:center
}

.main-nav a {
  font-size:13px;
  font-weight:700;
  white-space:nowrap
}

.main-nav a:hover,.main-nav a.active {
  color:var(--accent)
}

.theme-toggle {
  border:1px solid var(--line);
  background:transparent;
  border-radius:50%;
  width:35px;
  height:35px;
  flex-shrink:0;
  color:var(--text)
}

.page-wrap {
  padding:48px 0 88px
}

.lab-hero {
  display:grid;
  grid-template-columns:1.4fr 1fr;
  gap:62px;
  align-items:center;
  padding:30px 0 58px
}

.eyebrow {
  font-size:12px;
  font-weight:700;
  display:inline-flex;
  align-items:center;
  gap:8px;
  letter-spacing:.02em
}

.live-dot {
  width:7px;
  height:7px;
  background:var(--accent);
  border-radius:50%
}

.hero-copy {
  position:relative
}

.hero-copy h1 {
  font-size:clamp(45px,5.2vw,66px);
  line-height:1.23;
  letter-spacing:-3.5px;
  margin:26px 0 25px;
  font-weight:900
}

.underlined {
  position:relative;
  z-index:1
}

.underlined:after {
  content:'';
  position:absolute;
  bottom:3px;
  left:0;
  width:100%;
  height:14px;
  background:#fbc1a5;
  z-index:-1;
  transform:rotate(-2deg)
}

[data-theme=dark] .underlined:after {
  background:#84452d
}

.hero-spark {
  position:absolute;
  font-weight:400;
  right:16px;
  top:72px;
  font-size:66px;
  color:var(--accent);
  transform:rotate(12deg)
}

.hero-copy>p {
  font-size:16px;
  color:var(--muted);
  line-height:1.9
}

.hero-actions,.inline-actions {
  display:flex;
  align-items:center;
  flex-wrap:wrap;
  gap:18px;
  margin-top:28px
}

.solid-button,.ghost-button,.chip-link {
  display:inline-flex;
  justify-content:center;
  align-items:center;
  gap:26px;
  padding:13px 22px;
  border:1px solid transparent;
  border-radius:10px;
  font-weight:700;
  font-size:14px;
  transition:transform .18s,background .18s
}

.solid-button {
  background:var(--text);
  color:var(--bg)
}

.solid-button:hover {
  background:var(--accent);
  color:#fff;
  transform:translateY(-2px)
}

.ghost-button,.chip-link {
  background:var(--surface);
  color:var(--text);
  border-color:var(--line)
}

.text-link {
  font-size:13px;
  font-weight:700;
  text-decoration:underline;
  text-underline-offset:5px
}

.hero-caption {
  display:flex;
  align-items:center;
  gap:10px;
  font-size:11px;
  color:var(--muted);
  margin-top:26px
}

.hero-caption span:first-child {
  font-size:9px;
  font-weight:700;
  letter-spacing:1px;
  border-right:1px solid var(--line);
  padding-right:10px
}

.intuition-card {
  position:relative;
  background:var(--surface);
  border:1px solid var(--line);
  border-radius:var(--radius);
  padding:27px;
  box-shadow:8px 9px 0 var(--soft);
  transform:rotate(2deg)
}

.tiny-heading {
  display:flex;
  justify-content:space-between;
  font-size:11px;
  font-weight:700
}

.tiny-heading span {
  font-family:monospace;
  color:var(--muted)
}

.probability-badge {
  font-size:74px;
  line-height:1.5;
  text-align:center;
  font-weight:900;
  letter-spacing:-5px;
  color:#8150ce;
  position:relative;
  margin:9px 0;
  background:radial-gradient(ellipse at center,var(--violet) 0 48%,transparent 49%);
  transform:rotate(-4deg)
}

.intuition-card h2 {
  font-size:19px;
  line-height:1.6;
  letter-spacing:-.6px;
  text-align:center
}

.guess-options {
  display:grid;
  gap:8px
}

.guess-options button,.prediction-options button {
  border:1px solid var(--line);
  background:var(--bg);
  color:var(--text);
  padding:12px;
  border-radius:10px;
  font-size:13px;
  font-weight:700
}

.guess-options button:hover,.prediction-options button:hover,.prediction-options button[aria-pressed=true] {
  background:var(--text);
  color:var(--bg);
  border-color:var(--text)
}

.card-note {
  font-size:10px;
  text-align:center;
  color:var(--muted);
  margin-top:18px
}

.home-answer {
  background:var(--lime);
  padding:16px;
  border-radius:12px;
  text-align:center;
  font-size:13px
}

.home-answer p {
  margin:6px 0
}

.home-answer a {
  font-weight:700;
  text-decoration:underline
}

.ticker {
  display:flex;
  justify-content:space-around;
  gap:20px;
  padding:16px 0;
  border-top:1px solid var(--line);
  border-bottom:1px solid var(--line);
  font-size:11px;
  font-weight:700;
  letter-spacing:1px;
  color:var(--muted);
  overflow:hidden;
  white-space:nowrap
}

.section {
  margin-top:62px
}

.section-head {
  display:flex;
  justify-content:space-between;
  align-items:end;
  gap:20px;
  margin-bottom:25px
}

.section-kicker {
  font:700 10px monospace;
  letter-spacing:2px;
  color:var(--muted)
}

.section-head h2,.toolkit h2 {
  font-size:29px;
  letter-spacing:-1.3px;
  margin:10px 0
}

.section-head p {
  font-size:14px;
  color:var(--muted);
  margin:0
}

.section-counter {
  font-size:11px;
  color:var(--muted);
  white-space:nowrap
}

.filter-row {
  display:flex;
  flex-wrap:wrap;
  gap:8px;
  margin-bottom:25px
}

.filter-chip {
  background:transparent;
  border:1px solid var(--line);
  padding:8px 16px;
  border-radius:30px;
  font-size:12px;
  color:var(--muted)
}

.filter-chip.active {
  background:var(--text);
  border-color:var(--text);
  color:var(--bg)
}

.filter-chip span {
  margin-left:9px;
  font:10px monospace
}

.experiment-grid {
  display:grid;
  grid-template-columns:repeat(4,minmax(0,1fr));
  gap:18px
}

.experiment-card {
  border:1px solid var(--line);
  border-radius:18px;
  background:var(--surface);
  overflow:hidden;
  transition:transform .2s,box-shadow .2s;
  display:flex;
  flex-direction:column
}

.experiment-card:hover {
  transform:translateY(-7px);
  box-shadow:0 12px 24px #0000000d
}

.card-top {
  display:flex;
  align-items:center;
  justify-content:space-between;
  padding:18px 18px 0;
  background:var(--card-color);
  font:9px monospace;
  letter-spacing:.7px
}

.round-arrow {
  display:grid;
  place-items:center;
  width:25px;
  height:25px;
  border:1px solid currentColor;
  border-radius:50%;
  font-size:15px
}

.violet {
  --card-color:var(--violet)
}

.lime {
  --card-color:var(--lime)
}

.peach {
  --card-color:var(--peach)
}

.blue {
  --card-color:var(--blue)
}

.card-art {
  height:146px;
  background:var(--card-color);
  position:relative;
  display:flex;
  align-items:center;
  justify-content:center;
  overflow:hidden
}

.art-number {
  position:relative;
  z-index:1;
  font-size:56px;
  letter-spacing:-3px;
  font-weight:900;
  transform:rotate(-8deg)
}

.art-number span {
  font-size:21px;
  margin-left:3px
}

.peach .art-number {
  font-size:29px;
  letter-spacing:-2px
}

.art-symbol {
  position:absolute;
  font-size:120px;
  right:8px;
  top:5px;
  opacity:.11;
  transform:rotate(12deg)
}

.card-bottom {
  padding:22px 18px;
  display:flex;
  flex-direction:column;
  flex:1
}

.category {
  font-size:10px;
  color:var(--muted)
}

.card-bottom h3 {
  font-size:20px;
  letter-spacing:-.8px;
  margin:7px 0 10px
}

.card-bottom p {
  font-size:12px;
  color:var(--muted);
  margin:0 0 24px;
  line-height:1.8
}

.card-cta {
  display:flex;
  justify-content:space-between;
  align-items:center;
  border-top:1px solid var(--line);
  padding-top:14px;
  margin-top:auto;
  font-size:11px;
  font-weight:700
}

.manifesto {
  display:grid;
  grid-template-columns:65px 1fr 1fr;
  align-items:start;
  gap:20px;
  padding:42px 0;
  margin-top:70px;
  border-top:1px solid var(--line);
  border-bottom:1px solid var(--line)
}

.manifesto-symbol {
  font-size:105px;
  color:var(--accent);
  line-height:1.2
}

.manifesto h2 {
  font-size:28px;
  letter-spacing:-1px;
  line-height:1.5
}

.manifesto em {
  font-style:normal;
  color:var(--accent)
}

.manifesto p {
  font-size:13px;
  color:var(--muted)
}

.steps {
  padding-left:50px;
  display:grid;
  gap:20px
}

.steps>div {
  display:grid;
  grid-template-columns:35px 1fr;
  gap:0 14px
}

.steps span {
  font:13px monospace;
  color:var(--accent);
  grid-row:span 2;
  padding-top:4px
}

.steps strong {
  font-size:15px
}

.steps p {
  margin:3px 0
}

.toolkit {
  display:grid;
  grid-template-columns:1.3fr repeat(3,1fr);
  gap:25px;
  align-items:center
}

.toolkit h2 {
  font-size:23px
}

.toolkit>a {
  border-left:1px solid var(--line);
  padding-left:24px
}

.toolkit>a:hover h3 {
  color:var(--accent)
}

.toolkit>a>span {
  font:9px monospace;
  color:var(--muted)
}

.toolkit h3 {
  font-size:16px;
  margin:9px 0
}

.toolkit p {
  font-size:11px;
  color:var(--muted)
}

.site-footer {
  border-top:1px solid var(--line);
  padding:40px 0 34px;
  background:var(--soft)
}

.site-footer-inner {
  display:flex;
  justify-content:space-between;
  gap:28px
}

.footer-brand {
  font-size:23px;
  font-weight:900;
  letter-spacing:-1px
}

.site-footer p {
  font-size:12px;
  color:var(--muted);
  margin:8px 0
}

.site-footer small {
  font-size:10px;
  color:var(--muted)
}

.footer-links {
  display:flex;
  flex-wrap:wrap;
  align-content:start;
  gap:12px 22px;
  font-size:11px;
  color:var(--muted);
  max-width:390px
}

.footer-links a:hover {
  text-decoration:underline
}

/* Retained tools, games and articles share the new visual language. */
.page-title,.article-shell h1 {
  font-size:clamp(28px,4vw,46px);
  line-height:1.35;
  letter-spacing:-1.8px;
  margin:20px 0
}

.lede {
  font-size:17px;
  color:var(--muted)
}

.page-intro {
  margin-bottom:35px
}

.card-grid,.three-col {
  display:grid;
  grid-template-columns:repeat(3,minmax(0,1fr));
  gap:20px
}

.two-col,.mini-grid {
  display:grid;
  grid-template-columns:repeat(2,minmax(0,1fr));
  gap:20px
}

.card,.panel,.article-shell,.tool-box,.game-box,.hero-card {
  border:1px solid var(--line);
  border-radius:var(--radius);
  padding:30px;
  background:var(--surface)
}

.card strong {
  display:block;
  font-size:20px;
  margin:14px 0
}

.card p,.panel p,.tool-note,.game-note {
  color:var(--muted);
  font-size:14px
}

.article-shell {
  max-width:850px;
  margin:auto
}

.article-shell h2 {
  font-size:23px;
  margin-top:34px
}

.article-shell p,.article-shell li {
  font-size:15px;
  line-height:1.95
}

.article-meta,.chip-row {
  display:flex;
  gap:10px;
  flex-wrap:wrap
}

.meta-pill {
  font-size:11px;
  border:1px solid var(--line);
  border-radius:30px;
  padding:6px 12px
}

.callout,.result-box {
  padding:22px;
  background:var(--soft);
  border-radius:14px;
  margin:24px 0
}

.result-box strong {
  display:block;
  font-size:13px;
  margin-bottom:10px
}

.form-grid {
  display:grid;
  gap:16px;
  margin:22px 0
}

.field label {
  display:block;
  font-size:13px;
  font-weight:700;
  margin-bottom:8px
}

.field input,.field select,.field textarea {
  width:100%;
  padding:12px;
  border:1px solid var(--line);
  border-radius:9px;
  background:var(--bg);
  color:var(--text)
}

.score-board,.stat-grid {
  display:grid;
  grid-template-columns:repeat(3,minmax(0,1fr));
  gap:12px
}

.score-box,.stat-item {
  background:var(--soft);
  border-radius:12px;
  padding:18px
}

.score-box span,.stat-item span {
  display:block;
  font-size:12px;
  color:var(--muted)
}

.score-box strong,.stat-item strong {
  font-size:24px
}

.question-box {
  padding:25px;
  background:var(--violet);
  border-radius:15px;
  margin:20px 0
}

.question-box span {
  display:block;
  font-size:12px
}

.question-box strong {
  font-size:32px
}

.good,.is-good {
  color:#387534
}

.danger,.is-danger {
  color:#c74224
}

.split-list {
  padding-left:20px
}

.hero {
  display:grid;
  grid-template-columns:1.4fr 1fr;
  gap:20px
}

.hero h1 {
  font-size:40px;
  line-height:1.4
}

.tool-box h2,.game-box h2 {
  font-size:20px
}

/* Experiment detail */
.breadcrumb {
  font-size:12px;
  color:var(--muted);
  margin-bottom:28px
}

.breadcrumb a {
  text-decoration:underline
}

.lab-heading {
  max-width:820px;
  margin-bottom:30px
}

.lab-heading h1 {
  font-size:clamp(32px,4.4vw,53px);
  line-height:1.3;
  letter-spacing:-2px;
  margin:18px 0
}

.lab-heading p {
  color:var(--muted);
  max-width:680px
}

.lab-layout {
  display:grid;
  grid-template-columns:1.15fr 1fr;
  gap:24px;
  align-items:start
}

.lab-panel {
  border:1px solid var(--line);
  border-radius:20px;
  padding:28px;
  background:var(--surface)
}

.lab-panel h2 {
  font-size:20px;
  letter-spacing:-.6px;
  margin:14px 0
}

.step-label {
  font:700 10px monospace;
  letter-spacing:1px;
  color:var(--muted)
}

.prediction-options {
  display:grid;
  grid-template-columns:1fr 1fr;
  gap:9px;
  margin-top:16px
}

.prediction-feedback {
  color:var(--muted);
  font-size:12px;
  min-height:21px;
  margin:10px 0 0
}

.lab-controls {
  display:grid;
  grid-template-columns:1fr 1fr;
  gap:15px;
  margin:20px 0
}

.lab-controls label {
  font-size:12px;
  font-weight:700;
  display:block
}

.lab-controls input {
  width:100%;
  border:1px solid var(--line);
  background:var(--bg);
  color:var(--text);
  border-radius:9px;
  padding:11px;
  margin-top:6px
}

.lab-error {
  color:#c74224;
  font-size:13px;
  margin:8px 0
}

.lab-result {
  background:var(--card-color,var(--violet));
  border-radius:16px;
  padding:24px;
  margin-top:20px
}

.lab-result .big-result {
  font-size:48px;
  letter-spacing:-2px;
  line-height:1.3;
  font-weight:900;
  margin:10px 0
}

.lab-result p {
  font-size:13px;
  margin:8px 0
}

.meter {
  height:10px;
  border-radius:8px;
  background:var(--surface);
  overflow:hidden;
  margin:15px 0
}

.meter>span {
  display:block;
  background:var(--text);
  height:100%;
  width:0;
  transition:width .3s
}

.draw-grid {
  display:grid;
  grid-template-columns:repeat(20,1fr);
  gap:3px;
  margin-top:16px
}

.draw-dot {
  width:100%;
  aspect-ratio:1;
  background:var(--line);
  border-radius:3px
}

.draw-dot.win {
  background:var(--accent)
}

.legend {
  font-size:11px;
  color:var(--muted);
  margin-top:10px
}

.action-row {
  display:flex;
  flex-wrap:wrap;
  gap:9px;
  margin-top:18px
}

.action-row button {
  font-size:12px;
  padding:11px 15px
}

.lab-panel details {
  margin-top:15px;
  border-top:1px solid var(--line);
  padding-top:14px;
  font-size:13px
}

.lab-panel summary {
  font-weight:700;
  cursor:pointer
}

.math-note {
  font:12px monospace;
  background:var(--soft);
  border-radius:10px;
  padding:15px;
  overflow-wrap:anywhere;
  word-break:break-word
}

.bar-chart {
  display:flex;
  align-items:end;
  gap:8px;
  height:160px;
  border-bottom:1px solid var(--line);
  margin:25px 0 8px;
  padding:0 5px
}

.bar-chart>div {
  flex:1;
  background:var(--card-color);
  min-height:2px;
  position:relative;
  border-radius:7px 7px 0 0
}

.bar-chart>div:last-child {
  background:var(--accent)
}

.chart-labels {
  display:flex;
  justify-content:space-around;
  font-size:10px;
  color:var(--muted)
}

.comparison {
  display:grid;
  grid-template-columns:1fr 1fr;
  gap:12px;
  margin:16px 0
}

.comparison>div {
  padding:16px;
  border-radius:12px;
  background:var(--soft)
}

.comparison strong {
  display:block;
  font-size:26px
}

.comparison span {
  font-size:11px;
  color:var(--muted)
}

.explanation {
  max-width:800px;
  margin:48px auto
}

.explanation h2 {
  font-size:25px;
  letter-spacing:-1px;
  margin-top:36px
}

.explanation h3 {
  font-size:18px;
  margin-top:28px
}

.explanation p,.explanation li {
  font-size:15px;
  line-height:1.95;
  color:var(--muted)
}

.explanation strong {
  color:var(--text)
}

.source-note {
  border-top:1px solid var(--line);
  padding-top:18px;
  font-size:12px;
  color:var(--muted)
}

.source-note a {
  text-decoration:underline
}

.related-labs {
  border-top:1px solid var(--line);
  padding-top:35px
}

.related-labs h2 {
  font-size:24px
}

.noscript-note {
  padding:15px;
  background:var(--peach);
  border-radius:10px
}

.share-status {
  font-size:12px;
  min-height:20px;
  color:var(--muted)
}

.birthday-list {
  display:flex;
  flex-wrap:wrap;
  gap:5px;
  margin-top:12px
}

.birthday-list span {
  font:10px monospace;
  border:1px solid var(--line);
  padding:4px 7px;
  border-radius:6px
}

.birthday-list .match {
  background:var(--accent);
  color:#fff;
  border-color:var(--accent)
}

@media(min-width:1500px) {
  .page-wrap {
    padding-top:65px
  }
  .lab-hero {
    padding-bottom:75px
  }
}

@media(max-width:1020px) {
  .main-nav {
    gap:16px
  }
  .lab-hero {
    gap:28px
  }
  .hero-spark {
    right:0;
    font-size:45px
  }
  .hero-copy h1 {
    font-size:52px
  }
  .experiment-grid {
    grid-template-columns:repeat(2,minmax(0,1fr))
  }
  .card-art {
    height:170px
  }
  .manifesto {
    grid-template-columns:45px 1fr
  }
  .steps {
    grid-column:2;
    padding:20px 0 0;
    grid-template-columns:repeat(3,1fr);
    gap:15px
  }
  .toolkit {
    grid-template-columns:repeat(3,1fr)
  }
  .toolkit>div {
    grid-column:1/-1
  }
  .lab-layout {
    grid-template-columns:1fr 1fr
  }
}

@media(max-width:740px) {
  .site-header-inner,.page-wrap,.site-footer-inner {
    width:calc(100% - 36px)
  }
  .site-header-inner {
    min-height:80px;
    gap:14px;
    flex-wrap:wrap;
    padding:15px 0
  }
  .brand-copy strong {
    font-size:23px
  }
  .brand-mark {
    width:37px;
    height:37px;
    font-size:22px
  }
  .theme-toggle {
    margin-left:auto
  }
  .main-nav {
    order:3;
    justify-content:space-between;
    width:100%;
    margin:0;
    gap:10px
  }
  .main-nav a {
    font-size:11px
  }
  .page-wrap {
    padding:24px 0 55px
  }
  .lab-hero {
    grid-template-columns:1fr;
    gap:35px;
    padding:20px 0 42px
  }
  .hero-copy h1 {
    font-size:47px;
    letter-spacing:-2.8px
  }
  .hero-copy>p {
    font-size:14px
  }
  .hero-spark {
    right:25px;
    top:65px
  }
  .hero-actions {
    gap:18px
  }
  .intuition-card {
    transform:rotate(1deg);
    max-width:460px;
    width:100%;
    margin:auto;
    padding:24px
  }
  .probability-badge {
    font-size:60px
  }
  .intuition-card h2 {
    font-size:18px
  }
  .ticker {
    justify-content:flex-start;
    font-size:10px;
    gap:28px
  }
  .ticker span:nth-child(n+3) {
    display:none
  }
  .section {
    margin-top:40px
  }
  .section-head {
    display:block
  }
  .section-head h2 {
    font-size:23px
  }
  .section-counter {
    display:block;
    margin-top:12px
  }
  .experiment-grid {
    gap:12px
  }
  .card-top {
    padding:12px 12px 0;
    font-size:8px;
    letter-spacing:0
  }
  .card-art {
    height:125px
  }
  .art-number {
    font-size:48px
  }
  .peach .art-number {
    font-size:24px
  }
  .art-symbol {
    font-size:95px
  }
  .card-bottom {
    padding:17px 13px
  }
  .card-bottom h3 {
    font-size:18px
  }
  .card-bottom p {
    font-size:11px
  }
  .category {
    font-size:9px
  }
  .card-cta {
    font-size:10px
  }
  .manifesto {
    grid-template-columns:1fr;
    gap:8px;
    margin-top:40px;
    padding:30px 0
  }
  .manifesto-symbol {
    display:none
  }
  .manifesto h2 {
    font-size:25px
  }
  .steps {
    grid-column:auto;
    grid-template-columns:1fr;
    padding:15px 0 0
  }
  .steps>div {
    grid-template-columns:35px 1fr
  }
  .toolkit {
    grid-template-columns:1fr;
    gap:14px
  }
  .toolkit>div {
    grid-column:auto
  }
  .toolkit>a {
    padding:10px 15px;
    border:1px solid var(--line);
    border-radius:12px
  }
  .toolkit h3 {
    margin:5px 0
  }
  .toolkit p {
    margin:4px 0
  }
  .site-footer-inner {
    flex-direction:column
  }
  .footer-links {
    gap:10px 18px
  }
  .card-grid,.two-col,.three-col,.hero,.lab-layout {
    grid-template-columns:1fr
  }
  .card,.panel,.article-shell,.tool-box,.game-box,.hero-card {
    padding:22px
  }
  .score-box {
    padding:12px
  }
  .score-box strong {
    font-size:20px
  }
  .lab-heading h1 {
    letter-spacing:-1.3px
  }
  .lab-panel {
    padding:22px
  }
  .lab-controls {
    gap:12px
  }
  .lab-result .big-result {
    font-size:42px
  }
  .explanation {
    margin:35px auto
  }
  .explanation p,.explanation li {
    font-size:14px
  }
  .prediction-options {
    gap:7px
  }
  .prediction-options button {
    font-size:12px
  }
  .explanation ol,.explanation ul {
    padding-left:22px
  }
}

@media(prefers-reduced-motion:reduce) {
  html {
    scroll-behavior:auto
  }
  *,*:before,*:after {
    transition:none!important;
    animation:none!important
  }
}
/* More ways to discover a numerical surprise. */
.rose { --card-color: #f8dde6; }
.yellow { --card-color: #f4edc8; }
.mint { --card-color: #d9ebe2; }
.sand { --card-color: #eadfcd; }
[data-theme=dark] .rose { --card-color: #49313e; }
[data-theme=dark] .yellow { --card-color: #443f27; }
[data-theme=dark] .mint { --card-color: #263f34; }
[data-theme=dark] .sand { --card-color: #3b352a; }
.rose .art-number,.mint .art-number { font-size: 30px; letter-spacing: -2px; }
.yellow .art-number { font-size: 43px; }
.lab-divider { border: 0; border-top: 1px solid var(--line); margin: 24px 0; }
.interval-chart { padding: 20px 12px 20px 0; margin-top: 20px; }
.interval-row { display: flex; align-items: center; gap: 15px; margin: 22px 0; font-size: 12px; }
.interval-track { position: relative; height: 24px; flex: 1; background: var(--soft); border-radius: 6px; }
.interval-band { position: absolute; height: 100%; background: var(--card-color); border: 1px solid var(--muted); border-radius: 6px; }
.interval-dot { position: absolute; top: 7px; height: 10px; width: 10px; background: var(--accent); border-radius: 50%; transform: translateX(-50%); }
.curve-chart { margin-top: 24px; }
.curve-chart svg { display: block; width: 100%; }
.discount-flow { margin-top: 24px; display: grid; gap: 8px; }
.discount-flow>div { display: flex; justify-content: space-between; gap: 12px; padding: 14px; border-radius: 12px; background: var(--soft); font-size: 13px; }
.discount-flow>div:last-child { background: var(--card-color); }
.discount-flow>span { padding-left: 15px; color: var(--muted); font-size: 11px; }
@media(max-width:740px) { .rose .art-number,.mint .art-number { font-size: 24px; } .yellow .art-number { font-size: 36px; } }
/* A challenge about judgment, not speed. */
.challenge-shell { display: grid; grid-template-columns: 1.5fr 1fr; gap: 40px; align-items: start; }
.challenge-card { border: 1px solid var(--line); padding: 34px; background: var(--surface); border-radius: 22px; }
.challenge-top { display: flex; justify-content: space-between; gap: 20px; font-size: 12px; font-weight: 700; }
.quiz-track { background: var(--soft); height: 5px; margin-top: 16px; border-radius: 5px; overflow: hidden; }
.quiz-track>span { display: block; background: var(--accent); width: 0; height: 100%; transition: width .2s; }
.quiz-day { font-size: 11px; color: var(--muted); margin: 17px 0 24px; }
#quiz-question { font-size: 25px; line-height: 1.55; letter-spacing: -.8px; margin: 14px 0 25px; }
.quiz-options { display: grid; gap: 11px; }
.quiz-options button { display: flex; text-align: left; align-items: center; gap: 14px; padding: 16px; border: 1px solid var(--line); border-radius: 12px; background: var(--bg); color: var(--text); font-size: 14px; }
.quiz-options button>span:first-child { font: 11px monospace; color: var(--muted); }
.quiz-options button:hover:not(:disabled) { border-color: var(--text); }
.quiz-options button:disabled { opacity: 1; cursor: default; }
.quiz-options button.quiz-correct { border-color: #66813a; background: var(--lime); }
.quiz-options button.quiz-wrong { border-color: var(--accent); background: var(--peach); }
.quiz-explanation { background: var(--soft); margin-top: 23px; padding: 20px; border-radius: 12px; font-size: 13px; }
.quiz-explanation p { line-height: 1.9; color: var(--muted); }
#quiz-next { margin-top: 22px; }
.challenge-aside { padding: 20px 0; }
.challenge-aside h2 { font-size: 25px; line-height: 1.6; letter-spacing: -1px; }
.challenge-aside ol { padding-left: 23px; }
.challenge-aside li { padding: 8px 0; font-size: 14px; }
.challenge-aside li p { margin: 4px 0; font-size: 13px; color: var(--muted); }
.challenge-aside .callout { font-size: 12px; }
.challenge-aside .callout p { color: var(--muted); }
.quiz-score { font-size: 70px; line-height: 1.3; font-weight: 900; letter-spacing: -4px; color: var(--accent); }
.quiz-result h3 { font-size: 23px; }
.quiz-result>p { font-size: 14px; color: var(--muted); }
.quiz-review { margin-top: 30px; }
.quiz-review article { border-top: 1px solid var(--line); padding: 22px 0; }
.quiz-review h3 { font-size: 17px; line-height: 1.6; margin: 10px 0; }
.quiz-review p { font-size: 13px; color: var(--muted); }
.review-badge { font-size: 10px; border: 1px solid var(--line); padding: 5px 8px; border-radius: 20px; }
.quiz-review .review-answer { color: var(--text); font-weight: 700; font-size: 12px; }
#quiz-share-status textarea { display: block; width: 100%; min-height: 90px; background: var(--bg); color: var(--text); border: 1px solid var(--line); padding: 10px; }
.retired-game { padding: 50px 0; max-width: 720px; margin: auto; }
.retired-game .solid-button { margin: 20px 15px 20px 0; }
@media(max-width:740px) { .challenge-shell { grid-template-columns: 1fr; gap: 20px; } .challenge-card { padding: 22px; } #quiz-question { font-size: 21px; } .quiz-options button { font-size: 13px; padding: 14px; } .challenge-aside { padding-top: 5px; } }
.daily-banner { margin-top: 30px; padding: 27px 30px; display: flex; justify-content: space-between; align-items: center; gap: 26px; border: 1px solid var(--line); border-radius: 18px; background: var(--surface); }
.daily-banner h2 { font-size: 24px; letter-spacing: -.8px; margin: 9px 0; }
.daily-banner p { color: var(--muted); font-size: 12px; margin: 0; }
.daily-banner-action { display: flex; align-items: center; gap: 20px; flex-shrink: 0; }
.five-dots { display: flex; gap: 3px; }
.five-dots span { display: grid; place-items: center; width: 28px; height: 28px; border-radius: 50%; background: var(--violet); font-size: 12px; font-weight: 700; }
.five-dots span:nth-child(2n) { background: var(--lime); }
.five-dots span:last-child { background: var(--peach); }
@media(max-width:1020px) { .five-dots { display: none; } }
@media(max-width:740px) { .daily-banner { display: block; padding: 22px; } .daily-banner h2 { font-size: 21px; } .daily-banner-action { margin-top: 20px; } .daily-banner .section-kicker { letter-spacing: 1px; font-size: 9px; } }
.lab-result .big-result,.comparison strong { overflow-wrap: anywhere; word-break: normal; }
@media(max-width:740px) { .lab-result .big-result { font-size: 36px; } .comparison strong { font-size: 22px; } }
.related-labs .experiment-grid { grid-template-columns: repeat(3,minmax(0,1fr)); }
@media(max-width:740px) { .related-labs .experiment-grid { grid-template-columns: 1fr; } .related-labs .experiment-card { display: grid; grid-template-columns: 115px 1fr; } .related-labs .card-top { display: none; } .related-labs .card-art { height: 100%; min-height: 140px; } .related-labs .card-art .art-number { font-size: 30px; } .related-labs .card-bottom p { margin-bottom: 12px; } }