/* The study inherits the portfolio's shared colour theme and typography. */
:root {
  --study-correct: #426e87;
  --study-error: #a25b36;
  --seed-0: #376b91;
  --seed-1: #a05e22;
  --seed-2: #7461a6;
  --seed-3: #287c75;
  --seed-4: #a04d68;
}
:root[data-theme="dark"] {
  --study-correct: #a6c9dd;
  --study-error: #e7b18d;
  --seed-0: #9ec7e5;
  --seed-1: #e3b17d;
  --seed-2: #bcb0e1;
  --seed-3: #8ecac1;
  --seed-4: #e3a3b7;
}
@media (prefers-color-scheme: dark) {
  :root:not([data-theme="light"]) {
    --study-correct: #a6c9dd;
    --study-error: #e7b18d;
    --seed-0: #9ec7e5;
    --seed-1: #e3b17d;
    --seed-2: #bcb0e1;
    --seed-3: #8ecac1;
    --seed-4: #e3a3b7;
  }
}

#main { padding-bottom: 36px; }
.study-intro { max-width: 1030px; padding: 39px 0 30px; }
.study-category { color: var(--muted); font-size: 14px; line-height: 1.5; }
.study-intro h1 { margin: 11px 0 15px; font-size: clamp(34px, 4vw, 56px); line-height: 1.08; letter-spacing: -.035em; }
.study-intro .lede { max-width: 76ch; color: var(--ink); font-size: 19px; line-height: 1.55; }
.study-meta { margin-top: 15px; color: var(--muted); font-family: var(--sans); font-size: 13px; line-height: 1.6; }

/* One persistent setting bar controls both the main result and diagnostics. */
.trial-design {
  position: sticky;
  top: var(--header-height, 76px);
  z-index: 10;
  display: grid;
  grid-template-columns: minmax(210px, .75fr) minmax(0, 1.65fr);
  align-items: center;
  column-gap: 40px;
  padding: 20px 0 18px;
  border-top: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
  background: var(--paper);
}
.trial-design h2 { margin: 0; font-size: 23px; line-height: 1.2; letter-spacing: -.02em; }
.saved-setting { margin-top: 7px; color: var(--muted); font-size: 12px; line-height: 1.5; }
#count-label { color: var(--ink); font-size: 13px; line-height: 1.5; }
.control-context { color: var(--muted); }
.count-controls { display: grid; grid-template-columns: repeat(6, minmax(44px, 66px)); gap: 7px; margin: 8px 0; }
.count-controls button { min-width: 44px; min-height: 40px; padding: 4px 8px; border: 1px solid var(--line); border-radius: 4px; background: var(--card); color: var(--ink); font-family: var(--sans); font-size: 16px; font-variant-numeric: tabular-nums; }
.count-controls button:hover { border-color: var(--link); background: var(--soft); }
.count-controls button[aria-pressed="true"] { border-color: var(--link); background: var(--link); color: var(--paper); font-weight: 600; }
.count-controls button:focus-visible { outline: 3px solid var(--link); outline-offset: 3px; }
.balance-key { margin: 0; max-width: 70ch; color: var(--muted); font-size: 12px; line-height: 1.5; }

/* Allocation and interpretation are distinct views of the same selected mix. */
.experiment { border-bottom: 1px solid var(--line); }
.experiment-body { display: grid; grid-template-columns: minmax(0, 1fr) minmax(0, 1.12fr); gap: 50px; padding: 31px 0 30px; }
.study-allocation, .study-results { min-width: 0; }
.study-allocation > h2 { margin: 0 0 20px; font-size: 19px; line-height: 1.3; letter-spacing: -.015em; }
.allocation { display: grid; grid-template-columns: 1fr 1fr; border-top: 1px solid var(--line); }
.trial-cell { min-width: 0; padding: 15px 16px 17px 0; border-bottom: 1px solid var(--line); }
.trial-cell:nth-child(even) { padding-left: 22px; padding-right: 0; border-left: 1px solid var(--line); }
.trial-cell h3 { font-size: 13px; line-height: 1.5; font-weight: 400; color: var(--muted); }
.trial-cell strong { display: block; margin: 5px 0 9px; font-size: 29px; line-height: 1.2; font-weight: 600; letter-spacing: -.025em; font-variant-numeric: tabular-nums; }
.dots { display: grid; grid-template-columns: repeat(10, minmax(0, 7px)); gap: 3px; }
.dots i { display: block; aspect-ratio: 1; border: 1px solid var(--line); border-radius: 50%; }
.dots i.filled { background: var(--study-correct); border-color: var(--study-correct); }
.is-error .dots i { border-radius: 1px; }
.is-error .dots i.filled { background: var(--study-error); border-color: var(--study-error); }
.design-note { margin-top: 12px; color: var(--muted); font-size: 12px; line-height: 1.55; }
#design-state { color: var(--ink); font-weight: 600; }
.design-note + .design-note { max-width: 66ch; margin-top: 6px; }
.result-context { margin: 0 0 8px; color: var(--muted); font-size: 13px; line-height: 1.5; }
.study-results h2 { max-width: 22ch; margin: 0 0 13px; font-size: clamp(25px, 2.5vw, 34px); line-height: 1.12; letter-spacing: -.025em; }
#result-explanation { max-width: 61ch; color: var(--muted); font-size: 16px; line-height: 1.6; }
.result-overview { display: grid; grid-template-columns: 1fr 1fr; gap: 25px; margin-top: 22px; padding-top: 17px; border-top: 1px solid var(--line); }
.result-overview > div > p:first-child { color: var(--ink); font-size: 14px; line-height: 1.4; }
.result-overview strong { display: block; margin: 7px 0 9px; font-size: clamp(37px, 3.8vw, 51px); font-weight: 600; line-height: 1.05; letter-spacing: -.04em; font-variant-numeric: tabular-nums; }
.overview-help { color: var(--muted); font-size: 12px; line-height: 1.5; }
.overview-scope { margin-top: 17px; max-width: 62ch; color: var(--muted); font-size: 12px; line-height: 1.6; }
.diagnostics-link { display: inline-flex; align-items: center; min-height: 36px; margin-top: 10px; color: var(--link); font-size: 13px; font-weight: 600; }
.no-js-note { margin-top: 16px; font-size: 13px; color: var(--muted); }

.study-takeaway { display: grid; grid-template-columns: minmax(200px, .75fr) minmax(0, 1.65fr); gap: 40px; padding: 28px 0 31px; border-bottom: 1px solid var(--line); }
.study-takeaway h2 { font-size: 22px; letter-spacing: -.02em; line-height: 1.25; }
.study-takeaway p { max-width: 70ch; color: var(--ink); font-size: 17px; line-height: 1.65; }
.study-depth { margin-bottom: 20px; }
.study-depth details { padding: 0; border-bottom: 1px solid var(--line); scroll-margin-top: calc(var(--header-height, 76px) + 180px); }
.study-depth summary { display: flex; align-items: center; gap: 14px; min-height: 68px; padding: 19px 0; color: var(--ink); font-size: 18px; line-height: 1.4; font-weight: 600; list-style: none; }
.study-depth summary::-webkit-details-marker { display: none; }
.study-depth summary::before { content: "+"; flex: none; width: 14px; color: var(--link); font-weight: 400; font-size: 22px; line-height: 1; }
.study-depth details[open] > summary::before { content: "\2212"; }
.study-depth details[open] { padding-bottom: 27px; }
.study-depth details > p { max-width: 90ch; margin: 0 0 16px 28px; color: var(--muted); font-size: 15px; line-height: 1.7; }
.study-depth details > p strong { color: var(--ink); font-weight: 600; }
.study-depth details a { color: var(--link); }
.study-depth figure { margin: 20px 0 0 28px; }
.study-depth figure img { width: 100%; height: auto; background: #fff; }
.study-depth figcaption { margin-top: 11px; max-width: 100ch; color: var(--muted); font-size: 12px; line-height: 1.6; }
.study-depth .source-links { display: flex; flex-wrap: wrap; gap: 9px 26px; }

/* Means, full ranges and the five exact seeds share one flat diagnostic row. */
.diagnostics-heading { display: flex; flex-wrap: wrap; align-items: baseline; justify-content: space-between; gap: 9px 25px; margin: 0 0 12px 28px; }
.diagnostics-heading .study-meta { margin: 0; font-size: 13px; }
.seed-legend { display: flex; flex-wrap: wrap; align-items: center; gap: 9px 17px; }
.seed-key { display: inline-flex; align-items: center; gap: 5px; color: var(--muted); font-size: 12px; line-height: 1.4; }
.seed-swatch { display: inline-block; width: 7px; height: 7px; border-radius: 50%; background: var(--seed-color); }
.seed-point { fill: var(--seed-color); }
.seed-0 { --seed-color: var(--seed-0); }
.seed-1 { --seed-color: var(--seed-1); }
.seed-2 { --seed-color: var(--seed-2); }
.seed-3 { --seed-color: var(--seed-3); }
.seed-4 { --seed-color: var(--seed-4); }
.metric-grid { display: block; margin-left: 28px; }
.metric { display: grid; grid-template-columns: minmax(190px, 1fr) 155px minmax(280px, 1.3fr); align-items: center; gap: 4px 27px; padding: 18px 0; border-top: 1px solid var(--line); }
.metric h3 { grid-column: 1; grid-row: 1; font-size: 15px; line-height: 1.55; font-weight: 400; }
.metric strong { grid-column: 2; grid-row: 1 / span 2; font-size: 33px; line-height: 1.2; letter-spacing: -.035em; font-weight: 600; font-variant-numeric: tabular-nums; }
.metric svg { grid-column: 3; grid-row: 1 / span 2; display: block; width: 100%; height: auto; max-height: 135px; color: var(--muted); overflow: visible; }
.metric .metric-range { grid-column: 1; grid-row: 2; margin: 0; color: var(--muted); font-size: 12px; line-height: 1.55; }
.study-depth details > .result-note { padding-top: 14px; border-top: 1px solid var(--line); font-size: 13px; }
.study-footer { border-top: 1px solid var(--line); }

@media (max-width: 1000px) {
  .experiment-body { gap: 32px; }
  .trial-design { column-gap: 25px; grid-template-columns: minmax(190px, .7fr) minmax(0, 1.3fr); }
  .study-takeaway { grid-template-columns: minmax(190px, .7fr) minmax(0, 1.3fr); gap: 25px; }
  .metric { grid-template-columns: minmax(160px, 1fr) 125px minmax(230px, 1.1fr); gap: 4px 15px; }
  .metric strong { font-size: 29px; }
}
@media (max-width: 780px) {
  .study-intro { padding-top: 29px; padding-bottom: 24px; }
  .study-intro .lede { font-size: 18px; }
  .trial-design { grid-template-columns: 1fr; row-gap: 13px; padding: 16px 0 13px; }
  .trial-design__heading { display: flex; flex-wrap: wrap; align-items: baseline; gap: 4px 18px; }
  .trial-design h2 { font-size: 20px; }
  .saved-setting { margin: 0; }
  .count-controls { grid-template-columns: repeat(6, minmax(0, 1fr)); }
  .experiment-body { display: flex; flex-direction: column; gap: 28px; padding-top: 26px; }
  .study-results { order: 0; }
  .study-allocation { order: 1; }
  .result-overview { margin-top: 20px; }
  .study-results h2 { max-width: 30ch; font-size: 30px; }
  .study-takeaway { grid-template-columns: 1fr; gap: 12px; padding: 25px 0; }
  .study-takeaway h2 { font-size: 21px; }
  .study-takeaway p { font-size: 16px; }
  .metric { grid-template-columns: minmax(0, 1fr) auto; gap: 8px 20px; }
  .metric h3 { grid-column: 1; grid-row: 1; }
  .metric strong { grid-column: 2; grid-row: 1; font-size: 32px; text-align: right; }
  .metric .metric-range { grid-column: 1 / -1; grid-row: 2; }
  .metric svg { grid-column: 1 / -1; grid-row: 3; max-width: 500px; max-height: none; margin-top: 6px; }
  .study-depth details { scroll-margin-top: calc(var(--header-height, 110px) + 210px); }
}
@media (max-width: 480px) {
  .study-intro h1 { margin-top: 9px; margin-bottom: 13px; font-size: 36px; }
  .study-category { font-size: 12px; }
  .study-intro .lede { font-size: 17px; line-height: 1.5; }
  .study-meta { margin-top: 12px; font-size: 12px; }
  .trial-design { row-gap: 10px; }
  .trial-design h2 { font-size: 18px; }
  .saved-setting { font-size: 11px; }
  .count-controls { gap: 5px; }
  .count-controls button { min-width: 0; min-height: 42px; font-size: 15px; }
  .balance-key { font-size: 11px; }
  .study-results h2 { font-size: 28px; }
  #result-explanation { font-size: 15px; }
  .result-overview { gap: 16px; }
  .result-overview > div > p:first-child { min-height: 39px; font-size: 14px; }
  .result-overview strong { font-size: 39px; }
  .overview-scope { font-size: 11px; }
  .diagnostics-link { font-size: 12px; }
  .trial-cell:nth-child(even) { padding-left: 15px; }
  .trial-cell h3 { font-size: 12px; }
  .dots { gap: 3px; grid-template-columns: repeat(10, minmax(0, 7px)); }
  .study-depth summary { min-height: 67px; padding: 18px 0; font-size: 16px; }
  .study-depth details > p, .study-depth figure { margin-left: 0; }
  .study-depth details > p { font-size: 14px; }
  .diagnostics-heading, .metric-grid { margin-left: 0; }
  .diagnostics-heading { gap: 10px; }
  .seed-legend { gap: 7px 13px; }
  .seed-key { font-size: 11px; }
  .metric { gap: 8px 12px; }
  .metric h3 { font-size: 13px; }
  .metric strong { font-size: 30px; }
  .metric .metric-range { font-size: 11px; }
}
@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *, *::before, *::after { animation: none !important; transition: none !important; scroll-behavior: auto !important; }
}
@media (forced-colors: active) {
  .dots i.filled { forced-color-adjust: none; background: Highlight; border-color: Highlight; }
  .count-controls button[aria-pressed="true"] { outline: 3px solid Highlight; outline-offset: -3px; }
  .seed-point { fill: CanvasText; }
}
@media print {
  .trial-design { position: static; }
  .count-controls, .theme-toggle { display: none; }
  .study-depth details { break-inside: avoid; }
  .experiment-body { display: block; }
  .study-results { margin-top: 24px; }
}