/* 13 Labs — Small Experiments
   White graph-paper canvas, deep forest green data marks,
   black monospaced measurement labels, quiet sans titles. */

:root {
  --paper: #ffffff;
  --ink: #14181a;
  --ink-soft: #3a4245;
  --forest: #0b4a34;
  --forest-deep: #073726;
  --forest-mid: #1f7a55;
  --grid: #e3ece6;
  --grid-strong: #cfdcd3;
  --rule: #c9d3cd;
  --wash: #f4f8f5;
  --alert: #8a1f11;
  --focus: #b4690e;
  --sans: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
  --mono: ui-monospace, SFMono-Regular, Menlo, Consolas, "Liberation Mono", monospace;
}

* { box-sizing: border-box; }

html { -webkit-text-size-adjust: 100%; }

body {
  margin: 0;
  background-color: var(--paper);
  background-image:
    linear-gradient(var(--grid) 1px, transparent 1px),
    linear-gradient(90deg, var(--grid) 1px, transparent 1px),
    linear-gradient(var(--grid-strong) 1px, transparent 1px),
    linear-gradient(90deg, var(--grid-strong) 1px, transparent 1px);
  background-size: 24px 24px, 24px 24px, 120px 120px, 120px 120px;
  background-position: -1px -1px, -1px -1px, -1px -1px, -1px -1px;
  color: var(--ink);
  font-family: var(--sans);
  font-size: 17px;
  line-height: 1.6;
}

.mono { font-family: var(--mono); font-size: 0.9em; letter-spacing: 0.01em; }

/* ---------- Links and focus ---------- */

a { color: var(--forest-deep); text-decoration: underline; text-underline-offset: 2px; }
a:hover { color: var(--forest); text-decoration-thickness: 2px; }

a:focus-visible,
button:focus-visible,
input:focus-visible,
textarea:focus-visible,
select:focus-visible,
summary:focus-visible {
  outline: 3px solid var(--focus);
  outline-offset: 2px;
  border-radius: 2px;
}

.skip-link {
  position: absolute;
  left: -9999px;
  top: 0;
  background: var(--forest-deep);
  color: #ffffff;
  padding: 0.6rem 1rem;
  z-index: 20;
  font-family: var(--mono);
}
.skip-link:focus { left: 0.5rem; top: 0.5rem; }

/* ---------- Header ---------- */

.site-header {
  background: var(--paper);
  border-bottom: 2px solid var(--forest-deep);
}

.site-header .header-inner {
  max-width: 1180px;
  margin: 0 auto;
  padding: 0.9rem clamp(1rem, 4vw, 2.5rem);
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  justify-content: space-between;
  gap: 0.5rem 2rem;
}

.site-header .brand {
  margin: 0;
  font-size: 1.35rem;
  font-weight: 700;
  letter-spacing: -0.01em;
}
.site-header .brand a { color: var(--ink); text-decoration: none; }
.site-header .brand a:hover { text-decoration: underline; }
.brand-note {
  display: inline-block;
  margin-left: 0.6rem;
  font-weight: 400;
  color: var(--ink-soft);
  font-size: 0.78rem;
  text-transform: uppercase;
  letter-spacing: 0.12em;
}

.site-header .site-nav ul {
  list-style: none;
  margin: 0;
  padding: 0;
  display: flex;
  flex-wrap: wrap;
  gap: 0.35rem 1.4rem;
}
.site-nav a {
  color: var(--ink);
  text-decoration: none;
  font-size: 0.95rem;
  border-bottom: 2px solid transparent;
  padding-bottom: 1px;
}
.site-nav a:hover { border-bottom-color: var(--forest); }
.site-nav a[aria-current="page"] {
  color: var(--forest-deep);
  border-bottom-color: var(--forest);
  font-weight: 600;
}

/* ---------- Page shells ---------- */

.page {
  max-width: 1180px;
  margin: 0 auto;
  padding: clamp(1.5rem, 4vw, 3rem) clamp(1rem, 4vw, 2.5rem) 3.5rem;
}

/* ---------- Home ---------- */

.home > h1 {
  font-size: clamp(2.1rem, 5.2vw, 3.5rem);
  line-height: 1.05;
  letter-spacing: -0.025em;
  font-weight: 650;
  margin: 0.4rem 0 0.9rem;
  max-width: 22ch;
  color: var(--ink);
}

.home-lede {
  max-width: 62ch;
  font-size: clamp(1.05rem, 2vw, 1.28rem);
  color: var(--ink-soft);
  margin: 0 0 1.6rem;
}

.home-guides {
  margin-top: 3rem;
  padding-top: 1.6rem;
  border-top: 2px solid var(--forest-deep);
}
.home-guides h2 {
  font-size: clamp(1.35rem, 2.6vw, 1.8rem);
  letter-spacing: -0.015em;
  margin: 0 0 1.1rem;
}

.guide-list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 1.1rem;
  grid-template-columns: 1fr;
}

.guide-list li {
  padding: 1rem 1.15rem;
  background: var(--wash);
  border-left: 4px solid var(--forest);
}

.guide-title {
  margin: 0 0 0.35rem;
  font-weight: 650;
  font-size: 1.08rem;
}
.guide-title a { text-decoration-thickness: 1px; }

.guide-desc {
  margin: 0;
  color: var(--ink-soft);
  font-size: 0.97rem;
  max-width: 68ch;
}

.guide-cta {
  margin: 1.6rem 0 0;
  font-family: var(--mono);
  font-size: 0.92rem;
}

/* ---------- Experiment page intro ---------- */

.page--experiment .page-intro { max-width: 74ch; }

.kicker {
  font-family: var(--mono);
  font-size: 0.8rem;
  text-transform: uppercase;
  letter-spacing: 0.14em;
  color: var(--forest);
  margin: 0 0 0.5rem;
}

.page--experiment h1 {
  font-size: clamp(2rem, 4.6vw, 3.1rem);
  line-height: 1.06;
  letter-spacing: -0.02em;
  font-weight: 650;
  margin: 0 0 0.8rem;
}

.lede {
  font-size: clamp(1.02rem, 1.8vw, 1.18rem);
  color: var(--ink-soft);
  margin: 0 0 1rem;
}

.notice {
  margin: 0 0 2rem;
  padding: 0.85rem 1rem;
  background: var(--wash);
  border-left: 4px solid var(--forest-mid);
  font-size: 0.96rem;
  color: var(--ink);
  max-width: 74ch;
}

.noscript {
  margin: 0 0 1.6rem;
  padding: 0.85rem 1rem;
  border: 2px solid var(--alert);
  color: var(--alert);
  background: #ffffff;
  font-size: 0.96rem;
}

/* ---------- Article page ---------- */

article.page.article .article-header {
  max-width: 74ch;
  margin: 0 0 1.6rem;
  padding-bottom: 1.1rem;
  border-bottom: 2px solid var(--forest-deep);
}
article.page.article .article-header h1 {
  font-size: clamp(2rem, 4.6vw, 3.1rem);
  line-height: 1.06;
  letter-spacing: -0.02em;
  font-weight: 650;
  margin: 0 0 0.6rem;
}
article.page.article .article-body {
  max-width: 74ch;
  color: var(--ink);
}
article.page.article .article-body h2 {
  font-size: clamp(1.3rem, 2.4vw, 1.7rem);
  letter-spacing: -0.015em;
  margin: 1.8rem 0 0.7rem;
}
article.page.article .article-body h3 {
  font-size: 1.06rem;
  margin: 1.4rem 0 0.45rem;
}
article.page.article .article-body p { margin: 0 0 1rem; }
article.page.article .article-body ul,
article.page.article .article-body ol { padding-left: 1.2rem; margin: 0 0 1rem; }
article.page.article .article-body code {
  font-family: var(--mono);
  font-size: 0.9em;
  background: var(--wash);
  padding: 0.1em 0.3em;
  border-radius: 2px;
}

/* ---------- Plot area (dominant visual) ---------- */

.gallery {
  display: grid;
  grid-template-columns: 1fr;
  gap: 1.4rem;
  margin: 0 0 2.4rem;
}

.dotplot-figure,
.worksheet {
  margin: 0 0 2.4rem;
  background: var(--paper);
  border: 1px solid var(--rule);
  border-top: 3px solid var(--forest-deep);
}

.dotplot-figure { padding: 0.7rem 0.8rem 0.5rem; }
.dotplot-figure figcaption {
  color: var(--ink);
  font-size: 0.8rem;
  margin: 0 0 0.5rem;
  letter-spacing: 0.02em;
}

.plot-host {
  width: 100%;
  min-height: 170px;
  display: flex;
  align-items: center;
  justify-content: center;
}

.dotplot {
  width: 100%;
  height: auto;
  max-height: 320px;
  display: block;
  overflow: visible;
}

.plot-frame { fill: #fbfdfb; stroke: var(--grid-strong); stroke-width: 1; }
.plot-grid { stroke: var(--grid); stroke-width: 1; }
.plot-dot { fill: var(--forest); fill-opacity: 0.88; stroke: var(--forest-deep); stroke-width: 0.5; }
.plot-label { fill: var(--ink); font-family: var(--mono); }

/* ---------- Worksheet ---------- */

.worksheet { padding: 1.1rem 1.1rem 1.4rem; }

.worksheet h2,
.results h2,
.limits h2 {
  font-size: clamp(1.3rem, 2.4vw, 1.7rem);
  letter-spacing: -0.015em;
  margin: 0 0 0.9rem;
}

.worksheet fieldset {
  border: 0;
  margin: 0;
  padding: 0;
  min-width: 0;
}
.worksheet fieldset[disabled] { opacity: 0.75; }

.worksheet legend {
  font-family: var(--mono);
  font-size: 0.8rem;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  color: var(--forest);
  padding: 0 0 0.6rem;
}

.field {
  margin: 0 0 1.15rem;
  max-width: 62ch;
  min-width: 0;
}

.field label {
  display: block;
  font-weight: 600;
  font-size: 0.98rem;
  margin: 0 0 0.35rem;
}

.field textarea,
.field input,
select,
input,
textarea {
  display: block;
  width: 100%;
  min-width: 0;
  max-width: 100%;
  font-family: var(--mono);
  font-size: 1rem;
  line-height: 1.5;
  color: var(--ink);
  background: #ffffff;
  border: 2px solid var(--ink-soft);
  border-radius: 2px;
  padding: 0.5rem 0.6rem;
}

.field textarea { resize: vertical; min-height: 5.2rem; }

.field--narrow { max-width: 34ch; }

.help {
  display: block;
  font-size: 0.86rem;
  color: var(--ink-soft);
  margin-top: 0.3rem;
  max-width: 60ch;
}

.error {
  display: block;
  color: var(--alert);
  font-size: 0.85rem;
  margin-top: 0.25rem;
  min-height: 0;
}
.error:empty { margin-top: 0; }

.field [aria-invalid="true"] { border-color: var(--alert); background: #fdf6f5; }

.actions {
  display: flex;
  flex-wrap: wrap;
  gap: 0.6rem;
  margin: 1.2rem 0 0;
}

button {
  font-family: var(--mono);
  font-size: 0.94rem;
  padding: 0.6rem 1rem;
  border: 2px solid var(--forest-deep);
  border-radius: 2px;
  background: var(--forest-deep);
  color: #ffffff;
  cursor: pointer;
}
button:hover:not(:disabled) { background: var(--forest); border-color: var(--forest); }
button.secondary {
  background: var(--paper);
  color: var(--forest-deep);
}
button.secondary:hover:not(:disabled) { background: var(--wash); }
button:disabled { opacity: 0.55; cursor: not-allowed; }

/* ---------- Results ---------- */

.results { margin: 0 0 2.4rem; }

.results h3 {
  font-size: 1.06rem;
  margin: 1.6rem 0 0.45rem;
  letter-spacing: 0.005em;
}

.results-live {
  margin: 0 0 0.4rem;
  padding: 0.7rem 0.9rem;
  background: var(--wash);
  border-left: 4px solid var(--forest-mid);
  font-size: 0.9rem;
  color: var(--ink);
}

.result-table {
  width: 100%;
  border-collapse: collapse;
  margin: 0.4rem 0 0;
  background: var(--paper);
}

.result-table caption {
  text-align: left;
  font-size: 0.85rem;
  color: var(--ink-soft);
  padding: 0.3rem 0 0.5rem;
  caption-side: top;
}

.result-table th,
.result-table td {
  border: 1px solid var(--rule);
  padding: 0.42rem 0.6rem;
  text-align: left;
  vertical-align: top;
  font-size: 0.94rem;
}

.result-table thead th {
  background: var(--forest-deep);
  color: #ffffff;
  font-weight: 600;
  font-size: 0.85rem;
  letter-spacing: 0.04em;
  text-transform: uppercase;
}

.result-table tbody th {
  font-weight: 600;
  background: var(--wash);
  width: 40%;
}

.result-table td { color: var(--ink); }

#settings-line {
  margin: 0.2rem 0 0;
  font-size: 0.88rem;
  color: var(--ink);
}

.table-scroll {
  overflow-x: auto;
  max-width: 100%;
  margin-top: 0.6rem;
  border: 1px solid var(--rule);
}
.table-scroll .result-table { margin: 0; }

details#samples-details {
  margin-top: 1.4rem;
  border-top: 1px solid var(--rule);
  padding-top: 0.8rem;
}
details#samples-details summary {
  cursor: pointer;
  font-family: var(--mono);
  font-size: 0.9rem;
  color: var(--forest-deep);
  font-weight: 600;
}

/* ---------- Limits ---------- */

.limits {
  border-top: 2px solid var(--forest-deep);
  padding-top: 1.4rem;
  max-width: 74ch;
}
.limits ul { margin: 0; padding-left: 1.2rem; }
.limits li { margin: 0 0 0.5rem; }

/* ---------- Footer ---------- */

.site-footer {
  background: var(--paper);
  border-top: 2px solid var(--forest-deep);
}
.site-footer .footer-inner {
  max-width: 1180px;
  margin: 0 auto;
  padding: 1.4rem clamp(1rem, 4vw, 2.5rem);
  display: flex;
  flex-wrap: wrap;
  gap: 0.6rem 2rem;
  justify-content: space-between;
  align-items: baseline;
  color: var(--ink-soft);
  font-family: var(--mono);
  font-size: 0.84rem;
}
.site-footer a { color: var(--forest-deep); }

/* ---------- Contrast / motion safety ---------- */

@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after {
    animation-duration: 0.001ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.001ms !important;
    scroll-behavior: auto !important;
  }
}

/* ---------- Responsive ---------- */

@media (min-width: 640px) {
  .guide-list { grid-template-columns: repeat(2, minmax(0, 1fr)); }
}

/* Coordinator responsive completion of preserved generated source. */
*,*::before,*::after{box-sizing:border-box}img,svg{max-width:100%}input,textarea,select{max-width:100%;min-width:0}fieldset{min-width:0} .header-inner,.footer-inner{flex-wrap:wrap} .site-nav ul{display:flex;flex-wrap:wrap;gap:1rem;list-style:none;padding:0} .skip-link{position:absolute;left:-9999px}.skip-link:focus{left:1rem;top:1rem;z-index:100;background:white;color:black;padding:1rem}article.page.article{max-width:78rem;margin:auto;padding:clamp(1rem,4vw,3rem)}.article-body{max-width:72ch}.article-body p,.article-body li{line-height:1.7}button,a,input,textarea,select{touch-action:manipulation}:focus-visible{outline:3px solid #865600;outline-offset:3px}table{max-width:100%}td,th{overflow-wrap:anywhere}
@media(max-width:680px){.hero,.hero-grid,.tool-layout,.experiment-layout,.workbench,.workspace,.desk-layout,.map-layout,.ba-grid,.gallery,.guide-list,.totals,.result-grid,.results-grid,.two-column,.editorial-grid{grid-template-columns:minmax(0,1fr)!important}.page{min-width:0}.stage-row{flex-wrap:wrap}.site-header .header-inner{display:flex;flex-direction:column;align-items:flex-start}h1{overflow-wrap:anywhere}table{font-size:.85rem}}