:root {
  --ink:#13212d;
  --muted:#52616d;
  --paper:#f4f6f8;
  --line:#d2dae0;
  --panel:#fff;
  --accent:#086772;
  --bright:#76e2e8;
  --tint:#e1f5f5;
  --night:#112936;
  --radius:18px;
  font-family:'Avenir Next','Segoe UI',Arial,sans-serif;
  color:var(--ink);
  background:var(--paper);
  font-synthesis:none;
  font-size:16px
}
* {
  box-sizing:border-box
}
body {
  margin:0;
  line-height:1.55
}
button,input,select {
  font:inherit
}
button,a,input,select,summary {
  -webkit-tap-highlight-color:transparent
}
button,select,input {
  min-height:44px
}
button {
  cursor:pointer;
  border:1px solid var(--line);
  background:#fff;
  color:var(--ink);
  border-radius:9px;
  padding:10px 16px;
  font-weight:650;
  transition:background .15s,transform .15s
}
button:hover {
  background:var(--tint);
  border-color:var(--accent)
}
button:active {
  transform:translateY(1px)
}
button:disabled {
  opacity:.48;
  cursor:default;
  transform:none
}
button.primary,.primary-link {
  background:var(--accent);
  border-color:var(--accent);
  color:white
}
button.primary:hover,.primary-link:hover {
  filter:brightness(.92)
}
button.quiet {
  background:transparent;
  font-weight:500
}
button.small {
  padding:7px 11px
}
button[aria-pressed=true] {
  background:var(--accent);
  color:white;
  border-color:var(--accent)
}
a {
  color:var(--accent);
  text-underline-offset:4px
}
a:hover {
  text-decoration-thickness:2px
}
a,button,input,summary,select,[tabindex]:focus-visible {
  outline-offset:4px
}
:focus-visible {
  outline:3px solid #ce6700;
  outline-offset:4px
}
input,select {
  border:1px solid #9babb7;
  border-radius:8px;
  background:#fff;
  color:var(--ink);
  padding:9px 12px;
  max-width:100%
}
input[type=range] {
  accent-color:var(--accent);
  padding:0;
  width:100%
}
input[type=checkbox] {
  min-height:auto;
  accent-color:var(--accent);
  width:20px;
  height:20px
}
label {
  font-weight:600
}
h1,h2,h3,p {
  margin-top:0
}
h1 {
  font-size:clamp(2.25rem,4vw,3.5rem);
  letter-spacing:-.05em;
  line-height:1.05;
  margin-bottom:12px
}
h2 {
  font-size:1.65rem;
  letter-spacing:-.035em;
  line-height:1.2;
  margin-bottom:10px
}
h3 {
  font-size:1.1rem;
  line-height:1.35;
  margin-bottom:12px
}
p {
  margin-bottom:16px
}
.serif {
  font-family:Georgia,'Times New Roman',serif;
  font-weight:400;
  font-style:italic
}
.muted {
  color:var(--muted)
}
.small-text {
  font-size:.875rem
}
.eyebrow {
  text-transform:uppercase;
  letter-spacing:.13em;
  font-weight:700;
  font-size:.75rem;
  color:var(--accent);
  margin-bottom:12px
}
.skip {
  position:absolute;
  top:-80px;
  left:16px;
  z-index:99;
  background:white;
  padding:12px
}
.skip:focus {
  top:10px
}
.sr-only {
  position:absolute;
  width:1px;
  height:1px;
  padding:0;
  margin:-1px;
  overflow:hidden;
  clip:rect(0,0,0,0);
  white-space:nowrap;
  border:0
}
.topbar {
  border-bottom:1px solid var(--line);
  display:flex;
  align-items:center;
  justify-content:space-between;
  gap:15px;
  padding:18px max(24px,calc((100vw - 1200px)/2));
  min-height:75px;
  background:#fff
}
.brand {
  text-decoration:none;
  color:var(--ink);
  font-weight:750;
  letter-spacing:-.035em;
  font-size:1.2rem;
  display:flex;
  align-items:center;
  gap:10px
}
.brand-mark {
  display:inline-grid;
  place-items:center;
  width:32px;
  height:32px;
  background:var(--ink);
  color:#fff;
  border-radius:50%;
  font-family:Georgia,serif
}
.top-meta {
  font-size:.875rem;
  color:var(--muted)
}
.topbar nav {
  display:flex;
  gap:20px;
  align-items:center
}
.topbar nav a {
  font-size:.875rem
}
.page {
  max-width:1256px;
  margin:auto;
  padding:32px 28px 70px
}
.game-heading {
  display:flex;
  align-items:flex-start;
  justify-content:space-between;
  gap:24px;
  margin-bottom:24px
}
.game-heading p {
  color:var(--muted);
  margin:0;
  max-width:650px
}
.game-heading .eyebrow {
  color:var(--accent);
  margin-bottom:10px
}
.game-index {
  color:var(--accent);
  font:italic 4rem/1 Georgia,serif;
  opacity:.5
}
.progress {
  list-style:none;
  padding:0;
  display:flex;
  margin:0 0 26px;
  gap:5px
}
.progress li {
  flex:1;
  border-top:3px solid var(--line);
  padding-top:10px;
  font-size:.875rem;
  color:var(--muted);
  display:flex;
  gap:8px;
  align-items:center
}
.progress li span {
  width:23px;
  height:23px;
  display:inline-grid;
  place-items:center;
  border-radius:50%;
  background:#e0e5e9;
  font-size:.75rem;
  font-weight:700;
  flex-shrink:0
}
.progress .current {
  border-color:var(--accent);
  color:var(--ink);
  font-weight:650
}
.progress .current span,.progress .done span {
  background:var(--accent);
  color:#fff
}
.progress .done {
  border-color:var(--accent)
}
.stage-head {
  margin-bottom:22px;
  max-width:830px
}
.stage-head p:last-child {
  color:var(--muted);
  margin-bottom:0
}
.stage-head .eyebrow {
  margin-bottom:8px
}
.workspace {
  display:grid;
  grid-template-columns:minmax(0,1.65fr) minmax(280px,1fr);
  gap:22px;
  align-items:start
}
.panel {
  background:var(--panel);
  border:1px solid var(--line);
  border-radius:var(--radius);
  overflow:hidden;
  min-width:0
}
.panel-pad {
  padding:24px
}
.panel-title {
  display:flex;
  justify-content:space-between;
  align-items:baseline;
  gap:12px;
  margin-bottom:18px
}
.panel-title h3 {
  margin:0
}
.dark-panel {
  background:var(--night);
  color:white;
  border-color:var(--night)
}
.dark-panel .eyebrow,.dark-panel .muted {
  color:#a9c4cd
}
.dark-panel button {
  background:#ffffff0d;
  color:white;
  border-color:#ffffff30
}
.dark-panel button:hover {
  background:#ffffff24
}
.dark-panel button[aria-pressed=true] {
  background:var(--bright);
  color:#10222b
}
.dark-panel a {
  color:var(--bright)
}
.stack {
  display:grid;
  gap:18px
}
.row {
  display:flex;
  gap:10px;
  flex-wrap:wrap;
  align-items:center
}
.spread {
  justify-content:space-between
}
.actions {
  display:flex;
  gap:10px;
  flex-wrap:wrap;
  margin-top:20px
}
.tag {
  font-size:.75rem;
  letter-spacing:.05em;
  font-weight:700;
  padding:5px 10px;
  border:1px solid currentColor;
  border-radius:30px;
  white-space:nowrap
}
.feedback {
  border-left:4px solid var(--accent);
  background:var(--tint);
  padding:16px 18px;
  border-radius:0 10px 10px 0;
  margin-top:18px
}
.feedback strong {
  display:block;
  margin-bottom:4px
}
.feedback p {
  margin:0
}
.feedback.warn {
  --accent:#a45515;
  --tint:#fff0df
}
.feedback.success {
  --accent:#177458;
  --tint:#e5f6eb
}
.hint {
  margin-top:18px;
  border-top:1px solid var(--line);
  padding-top:12px;
  font-size:.94rem
}
summary {
  cursor:pointer;
  font-weight:650;
  padding:8px 0;
  min-height:44px
}
details p {
  margin:8px 0 12px
}
.research {
  margin-top:40px;
  border-top:1px solid var(--line);
  padding-top:20px
}
.research>summary {
  font-size:1.15rem
}
.research-content {
  max-width:880px;
  padding:12px 0 10px
}
.research details {
  border-top:1px solid var(--line);
  margin-top:20px;
  padding-top:12px
}
.research ul {
  padding-left:23px
}
.research li {
  margin:10px 0
}
.equation {
  font:1rem/1.7 'SFMono-Regular',Consolas,monospace;
  background:#e9edf1;
  border-radius:10px;
  padding:16px;
  overflow-wrap:anywhere
}
.game-footer {
  display:flex;
  justify-content:space-between;
  gap:20px;
  padding-top:30px;
  color:var(--muted);
  font-size:.875rem
}
.stat-line {
  display:flex;
  align-items:baseline;
  gap:10px;
  flex-wrap:wrap
}
.big-number {
  font-size:3.3rem;
  line-height:1;
  letter-spacing:-.05em;
  font-weight:700;
  font-variant-numeric:tabular-nums
}
.rule-select {
  display:flex;
  align-items:center;
  gap:12px;
  margin:14px 0
}
.rule-select label {
  width:35px;
  height:35px;
  border-radius:50%;
  display:grid;
  place-items:center;
  background:var(--tint);
  flex-shrink:0
}
.rule-select select {
  width:100%;
  font-size:.94rem
}
.network {
  width:100%;
  height:270px;
  display:block
}
.network text {
  font-family:inherit
}
.network-caption {
  padding:0 22px 22px;
  color:#b8d2d8;
  font-size:.875rem;
  text-align:center
}
.node-tabs {
  display:flex;
  gap:8px;
  justify-content:center;
  margin:6px 0 18px
}
.case-grid {
  display:grid;
  grid-template-columns:repeat(4,1fr);
  gap:9px
}
.case {
  display:flex;
  flex-direction:column;
  align-items:center;
  padding:11px 5px;
  font-size:.94rem;
  border-radius:10px;
  min-height:78px
}
.case strong {
  letter-spacing:.15em;
  font:1.2rem/1.3 monospace
}
.case span {
  font-size:.75rem;
  color:var(--muted);
  margin-top:5px
}
.case.win {
  border-color:#2b967d;
  background:#e9f9f1
}
.case.win span {
  color:#17644d
}
.case.selected {
  outline:2px solid var(--accent);
  outline-offset:1px
}
.truth-grid {
  display:grid;
  grid-template-columns:repeat(2,1fr);
  gap:8px;
  margin-top:12px
}
.truth-grid button {
  font-size:.875rem;
  min-height:48px
}
.edge-grid {
  display:grid;
  grid-template-columns:repeat(3,1fr);
  gap:8px;
  margin:12px 0
}
.edge-grid button {
  padding:8px 4px
}
.certificate {
  display:grid;
  grid-template-columns:1fr auto;
  gap:8px;
  border-top:1px solid var(--line);
  padding:12px 0
}
.certificate:first-child {
  border-top:0
}
.certificate .pass {
  color:#146049;
  font-weight:700
}
.ballots {
  display:grid;
  grid-template-columns:repeat(3,1fr);
  gap:14px
}
.ballot {
  background:#fff;
  border-radius:12px;
  padding:16px;
  color:var(--ink);
  box-shadow:0 4px 0 #ffffff20;
  position:relative
}
.ballot h3 {
  font-size:.75rem;
  text-transform:uppercase;
  letter-spacing:.1em;
  color:var(--muted);
  margin-bottom:16px
}
.ranking {
  display:flex;
  align-items:center;
  gap:7px;
  flex-wrap:wrap
}
.ranking.vertical {
  display:grid;
  gap:10px
}
.candidate {
  display:inline-grid;
  place-items:center;
  width:35px;
  height:35px;
  border-radius:8px;
  background:#edf0f4;
  color:#263b4b;
  font-weight:750
}
.candidate[data-candidate=A] {
  background:#c9efef
}
.candidate[data-candidate=B] {
  background:#ffdace
}
.candidate[data-candidate=C] {
  background:#e3daf9
}
.candidate[data-candidate=D] {
  background:#f5e9b4
}
.candidate-name {
  font-size:.875rem;
  font-weight:600
}
.vote-edge {
  display:flex;
  align-items:center;
  justify-content:space-between;
  gap:10px;
  border-bottom:1px solid #ffffff25;
  padding:13px 0
}
.vote-edge:last-child {
  border:0
}
.vote-edge .score {
  font:1.5rem monospace;
  color:var(--bright)
}
.domain-cards {
  display:grid;
  grid-template-columns:repeat(3,1fr);
  gap:12px
}
.domain-card {
  padding:16px 12px;
  text-align:left;
  min-height:105px;
  border:2px solid var(--line);
  background:white
}
.domain-card[aria-pressed=true] {
  color:var(--ink);
  background:var(--tint);
  border-color:var(--accent)
}
.domain-card .card-state {
  display:block;
  font-size:.75rem;
  margin-top:12px;
  letter-spacing:.05em;
  color:var(--muted)
}
.domain-card[aria-pressed=true] .card-state {
  color:var(--accent);
  font-weight:700
}
.domain-card .ranking {
  gap:4px
}
.domain-card .candidate {
  width:30px;
  height:30px
}
.domain-card[aria-pressed=false] {
  opacity:.7
}
.law-row {
  display:grid;
  grid-template-columns:80px 1fr;
  gap:12px;
  align-items:center;
  margin:10px 0
}
.law-row select {
  width:100%;
  font-size:.875rem
}
.orders-list {
  display:flex;
  gap:8px;
  flex-wrap:wrap
}
.order-chip {
  background:var(--tint);
  border-radius:6px;
  font:1rem monospace;
  letter-spacing:.15em;
  padding:9px 11px
}
.nim-board {
  display:flex;
  flex-direction:column;
  gap:20px;
  padding:24px
}
.heap {
  display:grid;
  grid-template-columns:38px 1fr 32px;
  gap:12px;
  align-items:center;
  min-height:50px
}
.heap-label {
  color:#b5c6df;
  font-size:.875rem
}
.stones {
  display:flex;
  flex-wrap:wrap;
  gap:7px
}
.stone {
  width:27px;
  height:27px;
  background:var(--bright);
  border-radius:7px;
  box-shadow:inset 0 -4px 0 #0002
}
.stone.ghost {
  opacity:.22;
  outline:1px dashed white;
  background:transparent
}
.heap-number {
  font:1.45rem monospace
}
.nim-control {
  display:grid;
  grid-template-columns:1fr 1fr;
  gap:14px
}
.nim-control label {
  display:grid;
  gap:6px;
  font-size:.875rem
}
.binary-grid {
  display:grid;
  grid-template-columns:55px repeat(4,1fr);
  gap:6px;
  align-items:center;
  text-align:center;
  font-family:monospace
}
.binary-grid>span {
  padding:8px 2px
}
.bit {
  background:#ffffff0c;
  border-radius:6px;
  font-size:1.2rem;
  color:#8b9fbc
}
.bit.on {
  background:var(--bright);
  color:#142137;
  font-weight:700
}
.binary-head {
  color:#b6c5db;
  font-size:.875rem
}
.parity {
  border-top:1px solid #ffffff30;
  margin-top:8px;
  padding-top:12px!important;
  font-size:.8rem
}
.parity.odd {
  color:#ffc78c
}
.parity.even {
  color:#9af1c3
}
.move-log {
  list-style:none;
  padding:0;
  margin:12px 0 0;
  max-height:220px;
  overflow-y:auto
}
.move-log li {
  padding:9px 0;
  border-bottom:1px solid var(--line);
  font-size:.875rem
}
.audit-cards {
  display:grid;
  grid-template-columns:repeat(3,1fr);
  gap:10px
}
.audit-card {
  background:var(--tint);
  padding:16px;
  border-radius:12px;
  text-align:center
}
.audit-card strong {
  display:block;
  font:1.3rem monospace;
  margin-bottom:6px
}
.audit-card span {
  font-size:.8rem
}
.rule-options {
  display:grid;
  gap:10px
}
.rule-option {
  text-align:left;
  padding:15px
}
.rule-option strong {
  display:block
}
.rule-option span {
  font-size:.875rem;
  font-weight:400
}
.audit-result {
  display:grid;
  grid-template-columns:1fr 1fr;
  gap:14px;
  margin:20px 0
}
.audit-result>div {
  background:var(--tint);
  border-radius:12px;
  padding:16px
}
.audit-result .big-number {
  font-size:2.3rem
}
.garden-controls {
  display:grid;
  grid-template-columns:repeat(3,1fr);
  gap:12px
}
.garden-controls label {
  display:grid;
  gap:6px;
  font-size:.875rem
}
.garden-controls input,.garden-controls select {
  width:100%
}
.garden-bed {
  display:grid;
  grid-template-columns:repeat(16,1fr);
  gap:5px;
  padding:20px;
  min-height:178px
}
.seed-cell {
  aspect-ratio:1;
  border-radius:4px;
  display:grid;
  place-items:center;
  background:var(--color);
  font-size:.65rem;
  color:#14291b;
  font-weight:800;
  min-width:0
}
.seed-cell.dim {
  opacity:.14
}
.garden-key {
  display:grid;
  grid-template-columns:repeat(4,1fr);
  gap:7px;
  padding:0 20px 20px
}
.garden-key button {
  padding:7px;
  font-size:.8rem;
  border-radius:7px;
  display:flex;
  gap:6px;
  align-items:center;
  justify-content:space-between;
  min-height:44px
}
.garden-key button .swatch {
  width:11px;
  height:11px;
  border-radius:2px;
  background:var(--color);
  flex-shrink:0
}
.garden-key button[aria-pressed=true] {
  background:#ffffff1d;
  color:white;
  outline:2px solid var(--bright)
}
.specimens {
  background:#ffffff08;
  border-top:1px solid #ffffff20;
  padding:18px 22px
}
.specimens p {
  margin:5px 0;
  font-family:Georgia,serif;
  font-size:1.1rem;
  color:#d8e7dd
}
.specimens em {
  color:var(--bright);
  font-style:normal
}
.garden-stats {
  display:grid;
  grid-template-columns:repeat(3,1fr);
  gap:12px
}
.garden-stats strong {
  font-size:1.9rem;
  letter-spacing:-.05em;
  display:block
}
.garden-stats span {
  font-size:.8rem;
  color:var(--muted)
}
.chart {
  width:100%;
  height:auto;
  display:block;
  margin-top:16px
}
.chart text {
  font-size:12px;
  fill:var(--muted);
  font-family:inherit
}
.chart line {
  stroke:var(--line)
}
.chart polyline {
  fill:none;
  stroke:var(--accent);
  stroke-width:3;
  stroke-linejoin:round
}
.season-range {
  display:flex;
  align-items:center;
  gap:12px;
  font-size:.875rem
}
.season-range input {
  flex:1
}
.comparison-grid {
  display:grid;
  grid-template-columns:repeat(3,1fr);
  gap:16px
}
.comparison-card {
  border-top:4px solid var(--accent);
  padding:18px;
  background:white;
  border-radius:4px 4px 12px 12px
}
.comparison-card strong {
  font-size:2rem;
  display:block
}
.table-wrap {
  overflow:auto
}
table {
  border-collapse:collapse;
  width:100%;
  font-size:.875rem
}
th,td {
  border-bottom:1px solid var(--line);
  padding:10px;
  text-align:left
}
th {
  font-weight:700
}
.ending {
  border:1px solid var(--accent);
  border-radius:18px;
  background:var(--tint);
  padding:25px;
  margin-top:24px
}
.ending h3 {
  font-size:1.4rem
}
.ending p {
  max-width:800px
}
.gallery {
  --paper:#101e29;
  --ink:#edf3f7;
  --muted:#b3c1ca;
  --line:#34434e;
  --panel:#182a38;
  background:var(--paper);
  color:var(--ink)
}
.gallery .topbar {
  background:transparent
}
.gallery .brand-mark {
  background:#edf3f7;
  color:#101e29
}
.gallery .brand {
  color:#edf3f7
}
.gallery .topbar a {
  color:#d5e5ef
}
.gallery .eyebrow {
  color:#9ac7d0
}
.gallery-intro {
  display:flex;
  justify-content:space-between;
  align-items:flex-end;
  gap:35px;
  margin:24px 0 40px
}
.gallery-intro h1 {
  font-size:clamp(3.3rem,6.5vw,5.8rem);
  margin:0;
  max-width:750px;
  letter-spacing:-.055em
}
.gallery-intro h1 .serif {
  color:#bfe9e6
}
.gallery-intro p {
  max-width:285px;
  margin-bottom:8px;
  color:#b9c9d3
}
.room-grid {
  display:grid;
  grid-template-columns:repeat(2,1fr);
  gap:22px
}
.room {
  display:grid;
  grid-template-columns:1fr 210px;
  grid-template-rows:1fr auto;
  text-decoration:none;
  background:var(--room);
  border:1px solid #ffffff24;
  border-radius:18px;
  min-height:258px;
  padding:26px;
  color:white;
  position:relative;
  overflow:hidden;
  transition:transform .2s,border-color .2s
}
.room:hover {
  transform:translateY(-3px);
  border-color:var(--room-accent);
  text-decoration:none
}
.room-copy {
  position:relative;
  z-index:1
}
.room .eyebrow {
  color:var(--room-accent)
}
.room h2 {
  font-size:2rem;
  color:white;
  margin-bottom:10px
}
.room p {
  font-size:.94rem;
  color:#d3e0e7;
  max-width:270px
}
.room svg {
  width:100%;
  height:180px;
  align-self:center
}
.room-footer {
  grid-column:1/-1;
  border-top:1px solid #ffffff25;
  padding-top:15px;
  display:flex;
  justify-content:space-between;
  color:#d2e0e7;
  font-size:.875rem
}
.room-arrow {
  color:var(--room-accent);
  font-size:1.3rem;
  line-height:1
}
.gallery-note {
  display:flex;
  gap:35px;
  justify-content:space-between;
  margin-top:35px;
  padding-top:25px;
  border-top:1px solid var(--line);
  color:var(--muted);
  font-size:.875rem
}
.gallery-note p {
  max-width:580px
}
.visited {
  font-size:.75rem;
  color:var(--room-accent);
  display:block;
  margin-top:8px
}
.assembly {
  --accent:#a3402a;
  --bright:#ffbb9f;
  --tint:#fff0e9;
  --night:#38252d
}
.invariant {
  --accent:#4c47aa;
  --bright:#bcb6ff;
  --tint:#edecff;
  --night:#22233e
}
.garden {
  --accent:#256238;
  --bright:#d1ed82;
  --tint:#eaf4e6;
  --night:#17362b
}
.empty-text {
  color:var(--muted);
  font-style:italic;
  padding:20px 0
}
@media(min-width:1440px) {
  .page {
    padding-top:42px
  }
  .network {
    height:300px
  }
}
@media(max-width:1000px) {
  .room {
    grid-template-columns:1fr 150px;
    padding:23px
  }
  .room svg {
    height:145px
  }
  .workspace {
    grid-template-columns:minmax(0,1.35fr) minmax(270px,1fr)
  }
  .gallery-intro h1 {
    font-size:4.5rem
  }
  .garden-key {
    grid-template-columns:repeat(2,1fr)
  }
  .domain-cards {
    grid-template-columns:repeat(2,1fr)
  }
}
@media(max-width:760px) {
  .page {
    padding:24px 18px 45px
  }
  .topbar {
    padding:15px 18px;
    min-height:65px
  }
  .top-meta {
    display:none
  }
  .brand {
    font-size:1.06rem
  }
  .topbar nav {
    gap:14px
  }
  .topbar nav a {
    font-size:.8rem
  }
  .game-heading {
    margin-bottom:22px
  }
  .game-index {
    display:none
  }
  .game-heading h1 {
    font-size:2.65rem
  }
  .game-heading p {
    font-size:.94rem
  }
  .progress {
    gap:8px;
    margin-bottom:24px
  }
  .progress li {
    font-size:.75rem;
    align-items:flex-start;
    gap:6px
  }
  .progress li span {
    width:19px;
    height:19px;
    font-size:.65rem
  }
  .workspace {
    grid-template-columns:1fr
  }
  .panel-pad {
    padding:20px
  }
  .stage-head h2 {
    font-size:1.5rem
  }
  .network {
    height:245px
  }
  .ballots {
    gap:9px
  }
  .ballot {
    padding:12px
  }
  .candidate-name {
    font-size:.8rem
  }
  .domain-cards {
    grid-template-columns:repeat(3,1fr);
    gap:8px
  }
  .domain-card {
    padding:12px 7px
  }
  .domain-card .candidate {
    width:24px;
    height:28px;
    font-size:.875rem
  }
  .domain-card .ranking {
    gap:2px
  }
  .comparison-grid {
    grid-template-columns:1fr
  }
  .garden-bed {
    gap:4px;
    padding:18px;
    grid-template-columns:repeat(16,1fr)
  }
  .garden-key {
    grid-template-columns:repeat(4,1fr);
    padding:0 18px 18px
  }
  .garden-key button {
    font-size:.75rem;
    flex-wrap:wrap;
    justify-content:center;
    gap:5px
  }
  .garden-key button .swatch {
    display:none
  }
  .garden-key button strong {
    width:100%;
    font-size:.875rem
  }
  .garden-controls {
    grid-template-columns:1fr 1fr
  }
  .garden-controls label:last-child {
    grid-column:1/-1
  }
  .gallery-intro {
    display:block;
    margin:22px 0 30px
  }
  .gallery-intro h1 {
    font-size:3.8rem;
    max-width:580px
  }
  .gallery-intro p {
    max-width:440px;
    margin-top:25px
  }
  .room-grid {
    grid-template-columns:1fr;
    gap:18px
  }
  .room {
    grid-template-columns:1fr 160px;
    min-height:245px;
    padding:22px
  }
  .gallery-note {
    display:block
  }
  .room h2 {
    font-size:1.9rem
  }
  .gallery-note p {
    margin-bottom:14px
  }
  .game-footer {
    flex-direction:column;
    gap:12px
  }
  .research {
    margin-top:30px
  }
  .truth-grid {
    grid-template-columns:repeat(2,1fr)
  }
  .garden-stats strong {
    font-size:1.7rem
  }
}
@media(max-width:380px) {
  .page {
    padding-left:14px;
    padding-right:14px
  }
  .room {
    grid-template-columns:1fr 118px;
    padding:18px
  }
  .room p {
    font-size:.875rem
  }
  .room svg {
    height:130px
  }
  .gallery-intro h1 {
    font-size:3.25rem
  }
  .progress li {
    font-size:.7rem;
    display:block
  }
  .progress li span {
    margin-right:4px
  }
  .domain-cards {
    grid-template-columns:repeat(2,1fr)
  }
  .ballots {
    gap:6px
  }
  .ballot {
    padding:10px 8px
  }
  .case-grid {
    grid-template-columns:repeat(4,1fr)
  }
  .garden-key {
    grid-template-columns:repeat(2,1fr)
  }
  .garden-key button strong {
    width:auto
  }
  .garden-controls {
    grid-template-columns:1fr
  }
  .garden-controls label:last-child {
    grid-column:auto
  }
  .room-footer {
    font-size:.8rem
  }
}
@media(prefers-reduced-motion:reduce) {
  *,*::before,*::after {
    transition:none!important;
    animation:none!important;
    scroll-behavior:auto!important
  }
}
@media print {
  .topbar,.actions,button,.game-footer,.hint {
    display:none
  }
  .page {
    max-width:100%;
    padding:0
  }
  .workspace {
    display:block
  }
  .panel {
    margin:15px 0;
    break-inside:avoid
  }
  .gallery {
    background:white;
    color:black
  }
  .research[open] {
    display:block
  }
}
[hidden] {
  display:none!important
}
@media(max-width:760px) {
  .game-heading {
    margin-bottom:18px
  }
  .page {
    padding-top:22px
  }
  .progress {
    margin-bottom:20px
  }
  .game-heading h1 {
    font-size:2.3rem
  }
  .stage-head {
    margin-bottom:18px
  }
}
.seed-cell.dim {
  opacity:.64
}
.seed-cell:not(.dim) {
  outline:2px solid #f3ffd9;
  outline-offset:1px
}
.garden-key .word-code {
  font-family:monospace;
  font-weight:750;
  color:#d7eac6
}
.garden-key button {
  gap:5px
}
.stone-pick {
  display:grid;
  place-items:center;
  min-height:44px;
  min-width:38px;
  padding:5px;
  background:transparent!important;
  border:1px solid transparent!important;
  border-radius:8px
}
.stone-pick:hover {
  border-color:var(--bright)!important
}
.stone-pick .stone {
  display:block;
  width:25px;
  height:25px
}
.stone-pick:disabled {
  opacity:1
}
.stones {
  gap:2px
}
.board-action {
  padding:0 24px 24px
}
.dark-panel .board-action button {
  background:var(--bright);
  color:var(--night);
  border-color:var(--bright)
}
@media(max-width:760px) {
  .garden-controls label:last-child {
    grid-column:auto
  }
  .nim-board {
    padding:18px;
    gap:9px
  }
  .heap {
    min-height:44px;
    gap:8px;
    grid-template-columns:22px 1fr 22px
  }
  .stone-pick {
    min-width:40px
  }
  .network-caption {
    padding:14px 18px;
    margin:0
  }
  .board-action {
    padding:4px 18px 18px
  }
  .garden-controls {
    grid-template-columns:1fr 1fr
  }
}
.room-copy {
  min-width:0
}
@media(max-width:760px) {
  .room {
    grid-template-columns:minmax(0,1fr) 112px
  }
  .room h2 {
    font-size:1.7rem
  }
  .room svg {
    height:140px
  }
  .room-footer {
    min-width:0
  }
}
@media(max-width:380px) {
  .room {
    grid-template-columns:minmax(0,1fr) 88px
  }
  .room h2 {
    font-size:1.55rem
  }
  .room svg {
    height:125px
  }
  .room-footer {
    font-size:.75rem;
    gap:7px
  }
}
.gallery-intro .eyebrow {
  max-width:none;
  margin-bottom:12px
}
/* Reflow remains usable when a visitor doubles the browser's text size. */ h1,h2,h3 {
  overflow-wrap:anywhere
}
.game-heading>div {
  min-width:0
}
.topbar {
  flex-wrap:wrap
}
.topbar nav {
  max-width:100%;
  flex-wrap:wrap
}
.brand {
  min-width:0;
  max-width:100%
}
.panel-title {
  flex-wrap:wrap
}
.tag {
  max-width:100%;
  white-space:normal
}
.progress {
  flex-wrap:wrap
}
.progress li {
  flex:1 1 4.7rem;
  min-width:0;
  overflow-wrap:anywhere
}
.candidate {
  line-height:1
}
.ballots {
  grid-template-columns:repeat(auto-fit,minmax(min(100%,5.5rem),1fr))
}
.ballot {
  min-width:0
}
.candidate-name {
  overflow-wrap:anywhere
}
.domain-cards {
  grid-template-columns:repeat(auto-fit,minmax(min(100%,max(26%,8rem)),1fr))
}
.domain-card .candidate {
  width:1.8rem;
  height:1.8rem
}
.nim-control {
  grid-template-columns:repeat(auto-fit,minmax(min(100%,8rem),1fr))
}
.nim-control label {
  min-width:0
}
.nim-control select {
  width:100%
}
.garden-key {
  grid-template-columns:repeat(auto-fit,minmax(min(100%,max(20%,6rem)),1fr))
}
.garden-key button {
  min-width:0;
  font-size:.875rem
}
.garden-stats {
  grid-template-columns:repeat(auto-fit,minmax(min(100%,6.5rem),1fr))
}
.room-footer {
  flex-wrap:wrap
}
.gallery-intro h1 {
  overflow-wrap:anywhere
}
.binary-grid {
  grid-template-columns:3rem repeat(4,minmax(0,1fr))
}
.binary-grid>span {
  overflow-wrap:anywhere
}
.edge-grid {
  grid-template-columns:repeat(auto-fit,minmax(min(100%,5rem),1fr))
}
.truth-grid {
  grid-template-columns:repeat(auto-fit,minmax(min(100%,7rem),1fr))
}
.brand-mark {
  width:2rem;
  height:2rem;
  flex-shrink:0;
  line-height:1
}
.progress li span {
  width:1.4rem;
  height:1.4rem;
  line-height:1
}
.case[aria-pressed=true] {
  color:var(--ink);
  background:#fff
}
.case.win[aria-pressed=true] {
  background:#e9f9f1
}
.stone.ghost {
  opacity:.55
}
.export-dialog {
  width:min(760px,calc(100% - 32px));
  max-height:90vh;
  overflow:auto;
  border:1px solid var(--line);
  border-radius:18px;
  padding:28px;
  background:var(--panel);
  color:var(--ink)
}
.export-dialog::backdrop {
  background:#0b192dbb
}
.export-dialog textarea {
  display:block;
  width:100%;
  margin-top:8px;
  border:1px solid var(--line);
  border-radius:9px;
  font:.875rem/1.5 monospace;
  padding:14px;
  resize:vertical;
  min-height:180px;
  color:var(--ink);
  background:var(--paper)
}
.primary-link {
  display:inline-flex;
  align-items:center;
  text-decoration:none;
  font-weight:650;
  border-radius:9px;
  padding:10px 16px;
  min-height:44px
}
.export-dialog form {
  margin:0
}

/* Review revision: explicit turns, optional workshops, and navigable chapters. */
#game { overflow-anchor:none; }
.advanced-jump { margin:0 0 26px; font-size:.92rem; }
.advanced { margin-top:36px; border:1px solid var(--line); border-radius:18px; background:var(--panel); }
.advanced > summary { padding:22px 26px; font-weight:750; color:var(--accent); }
.advanced-content { padding:8px 26px 28px; }
.advanced-content h2 { font-size:clamp(1.55rem,3vw,2.2rem); margin:12px 0; }
.advanced-content > p { max-width:78ch; }
.advanced-grid { display:grid; grid-template-columns:minmax(0,1fr) minmax(0,1fr); gap:22px; margin-top:24px; }
.advanced-grid > * { min-width:0; }
.field-space,.section-gap { margin-top:24px; }
.three-inputs { display:grid; grid-template-columns:repeat(3,minmax(0,1fr)); gap:16px; align-items:start; }
.three-inputs label { display:grid; gap:8px; min-width:0; }
.three-inputs select,.advanced-content select { max-width:100%; min-width:0; width:100%; }
.advanced-content label { font-size:.9rem; }
.phase-nav { display:grid; grid-template-columns:repeat(3,minmax(0,1fr)); gap:10px; }
.phase-nav button { display:flex; gap:9px; align-items:center; text-align:left; min-width:0; }
.phase-nav button span { display:grid; place-items:center; width:1.8rem; height:1.8rem; border:1px solid currentColor; border-radius:50%; flex-shrink:0; }
.phase-nav button[aria-current] { background:var(--accent); color:white; }
.active-rule { padding:14px 0; border-bottom:1px solid var(--line); font-size:.9rem; }
.chapter-next { margin-top:22px; padding-top:20px; border-top:2px solid var(--accent); }
.comparison-grid { margin-top:24px; }
.stone-pick,.stone-slot { width:40px; min-width:40px; height:44px; padding:5px; display:grid; place-items:center; flex:0 0 40px; }
.stone-pick .stone { display:grid; place-items:center; color:#1c2632; line-height:1; font-size:21px; font-weight:850; }
.stone-pick.selected-counter .stone { background:#f7df8b; outline:2px solid #fff; outline-offset:3px; opacity:1; }
.stone-slot > span { width:25px; height:25px; border:1px dashed #718398; border-radius:7px; }
.nimber-value { color:#fff; font:1.05rem/1.6 ui-monospace,monospace; }
.nimber-value strong { font-size:1.5rem; color:var(--bright); }
.nimber-moves { display:grid; grid-template-columns:repeat(2,minmax(0,1fr)); gap:10px; max-height:560px; overflow:auto; padding:4px; }
.nimber-moves button { display:flex; flex-direction:column; gap:5px; text-align:left; }
.nimber-moves span { font-size:.8rem; }
.nimber-moves .zero-move { background:var(--tint); border-color:var(--accent); }
.fishburn-axis { display:grid; grid-template-columns:repeat(5,minmax(0,1fr)); gap:8px; margin:22px 0; }
.fishburn-axis > div { display:grid; justify-items:center; gap:8px; background:var(--tint); border-radius:10px; padding:12px 4px; text-align:center; }
.fishburn-axis strong { font-size:1.5rem; }
.fishburn-axis span { font-size:.78rem; }
.bounded-orders { max-height:330px; overflow:auto; padding:4px; }
.table-scroll { max-width:100%; overflow:auto; }
.data-table { border-collapse:collapse; width:100%; font-size:.9rem; }
.data-table th,.data-table td { text-align:left; border-bottom:1px solid var(--line); padding:12px 10px; }
.data-table thead { background:var(--tint); }
.probability-bar { display:inline-block; vertical-align:middle; width:var(--p); max-width:100px; height:8px; background:var(--accent); border-radius:2px; margin-right:6px; }
.structure-chart { width:100%; height:auto; max-height:280px; }
.advanced-content .equation { white-space:normal; overflow-wrap:anywhere; font-size:.9rem; }
@media(max-width:900px) {
 .three-inputs { grid-template-columns:1fr; }
 .advanced-grid { grid-template-columns:1fr; }
}
@media(max-width:760px) {
 .advanced-content { padding:4px 16px 20px; }
 .advanced > summary { padding:18px 16px; }
 .phase-nav { gap:5px; }
 .phase-nav button { flex-direction:column; align-items:flex-start; padding:10px; font-size:.82rem; }
 .fishburn-axis { gap:4px; }
 .nimber-moves { grid-template-columns:1fr; }
 .advanced-content .panel-pad { padding:18px; }
 .data-table th,.data-table td { padding:10px 6px; }
}
@media(min-width:761px) {
 .phase-nav button { justify-content:center; }
}

.feedback p strong { display:inline; font-size:inherit; }
.fishburn-axis > div,.fishburn-axis span { min-width:0; max-width:100%; overflow-wrap:anywhere; }
.advanced-jump a { display:inline-block; max-width:100%; min-height:44px; padding:6px 0; }
.advanced-content .big-number { font-size:clamp(2rem,4vw,3rem); }

.continue-research{margin:32px 0;padding:24px;border-top:1px solid #b7c4ca}.continue-research h2{font-size:1.35rem}.continue-research a{color:#164c5a;text-underline-offset:4px;font-weight:600}.continue-research .actions{gap:16px 28px}.topbar nav{flex-wrap:wrap}