@charset "UTF-8";
@import url("theme.css");
*{box-sizing:border-box}
body{margin:0;background:var(--paper);color:var(--ink);font:18px/1.66 var(--sans);-webkit-font-smoothing:antialiased}
button,input,select{font:inherit}
button,a,input,select{touch-action:manipulation}
button{cursor:pointer;border:0;background:transparent;color:inherit}
button:disabled{opacity:.3;cursor:default}
a{color:inherit;text-underline-offset:4px}
button:focus-visible,a:focus-visible,summary:focus-visible,select:focus-visible,input:focus-visible{outline:3px solid var(--teal);outline-offset:4px}
[hidden]{display:none!important}

/* Header */
.site-header{min-height:74px;border-bottom:1px solid var(--line);display:flex;justify-content:space-between;align-items:center;padding:10px 4vw;gap:20px;background:rgba(246,245,240,.88);backdrop-filter:saturate(180%) blur(18px);-webkit-backdrop-filter:saturate(180%) blur(18px);position:sticky;top:0;z-index:30}
.header-brand-block{display:flex;flex-direction:column;gap:3px;min-width:0}
.header-credit{margin:0;font-size:13.5px;color:var(--muted);line-height:1.35}
.wordmark{text-decoration:none;font-weight:650;display:flex;gap:12px;align-items:center;font-size:17px;line-height:1.3}
.brand-symbol{border:1.5px solid var(--ink);border-radius:50%;font-size:19px;width:34px;height:34px;text-align:center;line-height:30px;flex-shrink:0}
.edition{font-size:11.5px;text-transform:uppercase;letter-spacing:.12em;color:var(--teal);margin-left:8px;font-weight:650;white-space:nowrap;padding:3px 9px;border-radius:999px;background:rgba(17,120,112,.1)}
.site-header nav{display:flex;align-items:center;gap:22px;font-size:15.5px;font-weight:500}
.outline-button{border:1px solid var(--line);border-radius:9px;padding:8px 16px;white-space:nowrap;background:var(--white);font-size:15px;font-weight:560;transition:border-color .28s var(--ease-apple),transform .28s var(--ease-apple),box-shadow .28s var(--ease-apple)}
.outline-button:hover{border-color:var(--ink);box-shadow:0 4px 12px rgba(0,0,0,.06)}
.text-button{font-size:15px;color:var(--muted);padding:8px 12px;font-weight:520}
.text-button:hover{color:var(--ink)}

.eyebrow{text-transform:uppercase;font-size:var(--concept-label-size);letter-spacing:.14em;font-weight:700;color:var(--teal)}

/* Main Immersive Stage */
.explorer.immersive-stage{max-width:1480px;margin:12px auto 48px;padding:0 68px 28px;background:transparent;border:0}
.stage-header{display:flex;flex-wrap:wrap;align-items:center;justify-content:space-between;gap:12px 20px;padding:8px 4px 14px;border-bottom:1px solid var(--line);margin-bottom:14px}
.stage-kicker{font-size:13px;text-transform:uppercase;letter-spacing:.14em;color:var(--teal);margin:0 0 3px;font-weight:700}
.stage-title{font:normal var(--page-title-size)/var(--page-title-leading) var(--serif);letter-spacing:-.02em;margin:0}
.view-switch{background:var(--white);border:1px solid var(--line);padding:4px;border-radius:999px;display:flex;gap:4px}
.view-switch button{padding:7px 16px;border-radius:999px;font-size:14.5px;font-weight:560;transition:background .3s var(--ease-apple),color .3s var(--ease-apple)}
.view-switch button[aria-pressed=true]{background:var(--ink);color:white}

.page-dots{display:flex;flex-wrap:wrap;gap:8px;align-items:center}
.page-dots button{width:10px;height:10px;border-radius:999px;border:1px solid #b5bebb;background:var(--white);padding:0;font-size:0;transition:all .38s var(--ease-apple)}
.page-dots button[aria-current=page]{width:28px;background:var(--teal);border-color:var(--teal)}

.stage-workspace{position:relative;background:var(--white);border:1px solid var(--line);border-radius:16px;padding:22px 24px 24px;box-shadow:0 12px 36px rgba(20,30,38,.04);overflow:hidden}
.stage-source{font-size:14px;color:var(--muted);margin:10px 0 0;line-height:1.6}
.explorer.page-scene-0 .stage-source,.explorer.page-scene-1 .stage-source,.explorer.page-scene-2 .stage-source{display:none}

/* Circular Apple-Style Left & Right Navigation Buttons */
.edge-nav{
  position:fixed;top:50%;transform:translateY(-50%);z-index:45;
  width:56px;height:56px;min-width:56px;min-height:56px;
  aspect-ratio:1/1;padding:0;
  border-radius:50%!important;
  display:flex;align-items:center;justify-content:center;
  border:1.5px solid rgba(29,39,48,.22);
  background:rgba(255,255,255,.78);
  backdrop-filter:saturate(180%) blur(20px);
  -webkit-backdrop-filter:saturate(180%) blur(20px);
  box-shadow:0 8px 26px rgba(18,28,36,.12),inset 0 1px 0 rgba(255,255,255,.9);
  color:var(--ink);
  opacity:.62;
  transition:opacity .42s var(--ease-apple),transform .42s var(--ease-apple),background .42s var(--ease-apple),box-shadow .42s var(--ease-apple),border-color .42s var(--ease-apple),color .42s var(--ease-apple);
}
.edge-nav-prev{left:14px}
.edge-nav-next{right:14px}
.edge-nav svg{width:24px;height:24px;display:block;flex-shrink:0;transition:transform .35s var(--ease-apple)}
.edge-nav-prev:hover svg{transform:translateX(-1.5px)}
.edge-nav-next:hover svg{transform:translateX(1.5px)}
.edge-nav:hover,.edge-nav:focus-visible{
  opacity:1;
  transform:translateY(-50%) scale(1.08);
  background:rgba(255,255,255,.97);
  border-color:var(--teal);
  color:var(--teal);
  box-shadow:0 14px 36px rgba(17,120,112,.22),inset 0 1px 0 #fff;
}
.edge-nav:active{transform:translateY(-50%) scale(0.95)}
.edge-nav:disabled{opacity:.16!important;pointer-events:none;transform:translateY(-50%) scale(0.92);box-shadow:none}

/* Page 1: Bayesian Optimization */
.page0-lead{font-size:18.5px;line-height:1.68;margin:0 0 16px;color:var(--ink);max-width:none}
.symbol-badges{display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:12px;list-style:none;padding:0;margin:0 0 16px}
.symbol-badges li{font-size:16px;line-height:1.52;padding:12px 15px;border:1px solid var(--line);border-radius:10px;background:#fafaf7;display:flex;flex-direction:column;gap:6px}
.symbol-badges li .badge-title{font-size:12.5px;font-weight:700;text-transform:uppercase;letter-spacing:.09em;color:var(--teal)}
.symbol-badges li .badge-math{font-size:16.5px;line-height:1.45;color:var(--ink);min-height:28px;display:flex;align-items:center;overflow-x:auto}
.symbol-badges li .badge-desc{font-size:15px;color:var(--muted);line-height:1.45}

.bo-loop-toolbar{display:flex;flex-wrap:wrap;align-items:center;gap:10px 16px;margin-bottom:16px;padding:10px 16px;background:#fafaf7;border:1px solid var(--line);border-radius:10px;font-size:16px;font-weight:500}
.bo-loop-status{font-size:16.5px;color:var(--ink);flex:1;min-width:220px;font-weight:600}
.page0-layout{display:grid;grid-template-columns:1.05fr 1fr 1fr;gap:16px;align-items:stretch}
.page0-plots{display:contents}
.bo-cycle-card{margin:0;background:#fcfcfa;display:flex;flex-direction:column;justify-content:space-between}
.bo-phase-description{font-size:15.5px;color:var(--ink);margin:8px 4px 0;padding:8px 12px;background:#f3f7f6;border-left:3px solid var(--teal);border-radius:6px;line-height:1.45;font-weight:500}
.demo-note{font-size:15px;color:var(--muted);margin:14px 4px 0;line-height:1.55}

/* Circular BO Loop SVG & Nodes */
svg .bo-guide-ring{fill:none;stroke:#dfe6e4;stroke-width:2}
svg .bo-flow-edge{fill:none!important;stroke:#96aca7;stroke-width:2.6;stroke-linecap:round;transition:stroke .38s var(--ease-apple),stroke-width .38s var(--ease-apple)}
svg .bo-flow-edge.is-active{stroke:var(--teal);stroke-width:3.8;stroke-dasharray:8 5;animation:boEdgeFlow 1s linear infinite}
@keyframes boEdgeFlow{to{stroke-dashoffset:-26}}

.loop-node-card{
  width:100%;height:100%;border-radius:11px;
  border:1.5px solid #c3cdca;background:#ffffff;
  padding:5px 8px;display:flex;flex-direction:column;justify-content:center;align-items:center;
  text-align:center;box-shadow:0 3px 10px rgba(0,0,0,.04);
  transition:border-color .38s var(--ease-apple),background .38s var(--ease-apple),box-shadow .38s var(--ease-apple);
}
.loop-node-card.is-active{
  border-color:var(--teal);border-width:2px;
  background:#e9f5f3;
  box-shadow:0 6px 18px rgba(17,120,112,.18);
}
.loop-node-title{font-size:13.5px;font-weight:700;color:var(--ink);line-height:1.2;margin-bottom:3px}
.loop-node-sub{font-size:12.5px;color:var(--ink);line-height:1.2}
.loop-node-sub .katex{font-size:1.0em!important}

/* Unified Control Bar on Pages 2 & 3 */
.unified-control-bar{display:flex;flex-wrap:wrap;align-items:center;gap:12px 20px;margin-bottom:16px;padding:12px 16px;background:#fafaf7;border:1px solid var(--line);border-radius:10px;font-size:16px;font-weight:550}
.unified-control-bar label{display:flex;align-items:center;gap:10px;flex-wrap:wrap;font-size:16px;font-weight:550}
.unified-control-bar select{font-size:16px;padding:6px 12px;border:1px solid var(--line);border-radius:7px;background:#fff;font-weight:550}
.unified-control-bar input[type=range]{width:125px;accent-color:var(--indigo)}
.unified-control-bar output{font-size:17px;font-weight:700;font-family:var(--serif)}
.position-control{display:grid;grid-template-columns:1fr auto;align-items:center;gap:0 14px;flex:1;min-width:220px;max-width:390px;font-size:16px;font-weight:550}
.position-control input{grid-column:1/-1;width:100%;margin:6px 0 0}
output{font-variant-numeric:tabular-nums;color:var(--indigo);font-weight:700}

/* Pages 2 & 3 Grid and The Information Geometric View */
.deep-dive-grid{display:grid;grid-template-columns:1fr 1fr;gap:16px}
.deep-row1{grid-row:1}
.ig-view-box{grid-column:1/-1;background:var(--ig-bg);border:1.5px solid var(--ig-border);border-radius:14px;padding:18px 18px 16px;margin-top:2px;overflow:hidden}
.ig-view-header{display:flex;align-items:baseline;justify-content:space-between;gap:16px;margin-bottom:14px;flex-wrap:wrap}
.ig-view-title{font:700 23px/1.25 var(--serif);margin:0;color:var(--ink)}
.ig-view-tag{font-size:14.5px;color:var(--teal);font-weight:600;letter-spacing:.02em}
.ig-inner-grid{display:grid;grid-template-columns:1fr 1fr;gap:16px;align-items:stretch;position:relative}

.ig-text-block{
  background:rgba(255,255,255,.86);border:1px solid rgba(17,120,112,.2);border-radius:10px;
  padding:18px 20px;font-size:17.5px;line-height:1.66;color:var(--ink);
  display:flex;flex-direction:column;justify-content:center;
}
#ig-text-block p{font-size:17.5px;line-height:1.66;color:#1d2730;margin:0 0 10px}
#ig-text-block p:last-child{margin-bottom:0}
.ig-prose .equation{margin:10px 0;padding:10px 14px;background:#fff;border:1px solid var(--line);border-radius:8px;overflow-x:auto;font-size:18.5px;text-align:center}
.chart-caveat{font-size:16px!important;color:#33424d!important;padding-top:4px;border-top:1px dashed rgba(17,120,112,.22)}

.explorer.page-scene-1 .ig-inner-grid{grid-template-areas:"text map"}
.explorer.page-scene-1 #ig-text-block{grid-area:text}
.explorer.page-scene-1 #map-card{grid-area:map;background:#fff}
.explorer.page-scene-1 #bound-card{display:none!important}

.explorer.page-scene-2 .ig-inner-grid{grid-template-areas:"map bound"}
.explorer.page-scene-2 #ig-text-block{display:none!important}
.explorer.page-scene-2 #map-card{grid-area:map;background:#fff}
.explorer.page-scene-2 #bound-card{grid-area:bound;background:#fff}
.page3-optimizer-note{grid-column:1/-1;margin-top:2px;padding:16px 18px;border:1.5px solid #dc8a63;border-left-width:5px;border-radius:11px;background:#fff4ed;color:#6b3422;font-size:16.5px;line-height:1.6}

/* Page 3 Full Paper Proof & Notation Box */
.proof-scroll{
  grid-column:1/-1;margin-top:18px;padding:28px 32px;
  border:1px solid var(--line);border-radius:14px;background:#fcfcfa;
  font-size:18px;line-height:1.74;color:#1d2730;
  box-shadow:inset 0 1px 0 rgba(255,255,255,.85);
}
.proof-paper-header{border-bottom:1px solid var(--line);padding-bottom:14px;margin-bottom:20px}
.proof-paper-header h3{font:normal 30px/1.22 var(--serif);margin:6px 0 0;color:var(--ink)}
.proof-scroll h4{font:650 22px/1.3 var(--serif);margin:28px 0 12px;color:var(--ink)}
.proof-scroll h5{font-size:18px;margin:0 0 8px;font-weight:700;color:var(--teal)}
.proof-step-card{padding:16px 20px;border:1px solid var(--line);border-radius:10px;background:#fff;margin-bottom:14px}
.proof-step-card p{margin:10px 0 0;font-size:17.5px;line-height:1.7}
.proof-two-col{display:grid;grid-template-columns:1fr 1fr;gap:14px 20px;font-size:17px}
.notation-card{padding:12px 16px;background:#fff;border:1px solid var(--line);border-radius:9px;line-height:1.55;display:flex;flex-direction:column;justify-content:center}
.notation-card p{margin:6px 0 0;color:var(--muted);font-size:16px}
.notation-formula{overflow-x:auto;padding:4px 0}
.equation-block{margin:12px 0;padding:14px 18px;background:#fff;border:1px solid var(--line);border-radius:8px;overflow-x:auto;font-size:19px;text-align:center}

/* KaTeX Computer Modern Typography */
.katex{font-size:1.06em!important;color:inherit}
.katex-display{margin:0.35em 0!important;overflow-x:auto;overflow-y:hidden}
.equation-block .katex,.ig-prose .equation .katex{font-size:1.1em!important}

/* Plot Cards & SVGs */
.plot-grid{display:grid;grid-template-columns:1fr 1fr;gap:16px}
.plot-card{margin:0;border:1px solid var(--line);border-radius:11px;padding:14px 14px 12px;min-width:0;background:var(--white);transition:border-color .28s var(--ease-apple),box-shadow .35s var(--ease-apple)}
.plot-card.is-focus{border-color:#789896;box-shadow:0 4px 18px rgba(17,120,112,.07)}
.plot-card figcaption{display:flex;justify-content:space-between;padding:0 4px 8px;gap:10px;align-items:flex-start}
.plot-card figcaption b{font-size:var(--plot-title-size);font-weight:650;color:var(--ink)}
.plot-card figcaption small{display:block;font-size:var(--plot-subtitle-size);color:var(--muted);margin-top:3px;line-height:1.4}
.figure-number{font:italic 22px var(--serif);color:#8fa0a0;flex-shrink:0}
.plot-card > svg{width:100%;height:auto;display:block;overflow:visible;max-height:330px}
.plot-card > svg.selectable{cursor:crosshair;touch-action:pan-y}
.legend{display:flex;gap:14px 18px;flex-wrap:wrap;font-size:var(--plot-legend-size);color:var(--muted);padding:6px 6px 0;line-height:1.55;align-items:center}
.legend > span,.legend > button{display:inline-flex;align-items:center;gap:6px}
.legend > span::before,.legend > button::before{content:'';display:inline-block;width:var(--legend-line-length);border-top:var(--legend-line-width) solid;vertical-align:middle;flex-shrink:0}
.legend-toggle{padding:2px 4px;border-radius:5px;color:var(--muted);font-size:inherit}
.legend-toggle:hover{background:#f1f3f1;color:var(--ink)}
.legend-toggle[aria-pressed=false]{opacity:.42;text-decoration:line-through}
.mean-key::before{color:var(--indigo)}
.band-key::before{border-top:11px solid #dfe5f2!important}
.true-key::before{color:#5e6a73;border-top-style:dashed!important;border-top-width:3px!important}
.point-key::before{width:9px!important;height:9px;border:0!important;border-radius:50%;background:var(--ink)}
.gradient-key::before{color:var(--orange)}
.acqf-gradient-key::before{color:var(--magenta)}
.bound-key::before{color:var(--teal);border-top-style:dashed!important}
.candidate-key::before{color:var(--teal);border-top-style:dashed!important}
.active-step-key::before{width:12px!important;height:12px;border:2.4px solid var(--teal)!important;border-radius:3px;background:#e9f5f3}
.loop-edge-key::before{color:#96aca7;border-top-style:dashed!important}
.tangent-key::before{color:var(--magenta);border-top-style:dashed!important}
.selected-key::before{width:10px!important;height:10px;border:2.4px solid #fff!important;border-radius:50%;background:var(--teal);box-shadow:0 0 0 1.2px var(--teal)}
.map-point-key::before{width:10px!important;height:10px;border:2.4px solid #fff!important;border-radius:50%;background:var(--violet);box-shadow:0 0 0 1.2px var(--violet)}
.map-curve-key::before{color:var(--violet)}
.dynamic-legend:empty{display:none}
.legend-key::before{color:var(--legend-color,var(--ink))}
.legend-key.is-dashed::before{border-top-style:dashed!important}
.legend-key.is-dot::before{width:var(--legend-dot-size)!important;height:var(--legend-dot-size);border:2.4px solid #fff!important;border-radius:50%;background:var(--legend-color);box-shadow:0 0 0 1.2px var(--legend-color)}
.legend-key.is-fill::before{height:11px;border:1.2px solid var(--legend-color)!important;background:color-mix(in srgb,var(--legend-color) 16%,white)}
.plot-footnote{font-size:var(--plot-footnote-size);padding:6px 6px 0;color:var(--muted);line-height:1.5}
.plot-footnote a{color:var(--indigo);font-weight:560}
.plot-footnote a:hover{color:var(--teal)}
.bound-scale-note{margin-top:7px;padding-top:8px;border-top:1px dashed #d9b8a8;color:#6b4435}
.bound-scale-note sup{color:var(--orange);font-size:18px;font-weight:800;vertical-align:-1px}
.interaction-hint{font-size:15.5px;color:var(--muted);margin:14px 4px 0}

/* Advanced Stage Lead & Controls */
.advanced-lead{font-size:18px;line-height:1.66;color:var(--ink);margin:0 0 12px;max-width:none}
.advanced-eq{margin:0 0 14px;padding:12px 16px}
.citation-strip{display:flex;flex-wrap:wrap;align-items:center;gap:7px 18px;margin:-2px 0 14px;padding:10px 14px;border:1px solid #d8dfdc;border-radius:9px;background:#f7faf9;font-size:14.5px;line-height:1.5;color:var(--muted)}
.citation-strip > strong{color:var(--teal);font-size:12px;text-transform:uppercase;letter-spacing:.1em}
.citation-group b{color:var(--ink);font-weight:650}
.citation-group a{color:var(--indigo);font-weight:560;text-decoration-thickness:1px}
.citation-group a:hover{color:var(--teal)}
.scene-controls{display:flex;flex-wrap:wrap;gap:10px 16px;margin-bottom:16px;padding:12px 16px;background:#fafaf7;border:1px solid var(--line);border-radius:10px}
.scene-controls .control-group{display:flex;flex-wrap:wrap;align-items:center;gap:12px 20px;width:100%}
.scene-controls label{font-size:16px;font-weight:550;display:flex;align-items:center;gap:8px;flex-wrap:wrap}
.scene-controls input[type=range]{width:115px;accent-color:var(--indigo)}
.scene-controls select{font-size:16px;font-weight:550;padding:6px 10px;border:1px solid var(--line);border-radius:6px;background:#fff}
.scene-controls output{font-size:17px;font-weight:700;font-family:var(--serif)}
.preset-row button.compact,.outline-button.compact{padding:7px 14px;font-size:14.5px;line-height:1.3}
.preset-row button[aria-pressed=true]{background:var(--ink);color:#fff;border-color:var(--ink)}
.advanced-plot.selectable-2d{cursor:crosshair;touch-action:none}
.explorer.page-scene-3 .advanced-plot.selectable-2d{cursor:default;touch-action:pan-y}
svg .insight-line{stroke-width:4}

/* Page 5: linked 2D landscape and stationary companion geometry */
.page5-theory-block{margin-bottom:16px;padding:18px 20px;border:1.5px solid var(--ig-border);border-radius:12px;background:#f4f8f7;color:var(--ink)}
.page5-theory-block p{margin:0 0 11px;font-size:16.5px;line-height:1.62}
.page5-theory-block p:last-of-type{margin-bottom:10px}
.page5-theory-block .equation-block{margin:9px 0 13px;background:#fff}
.page5-theory-block a{color:var(--indigo);font-weight:600}
.page5-stationary-layout{display:grid;gap:16px}
.stationary-map-grid{display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:12px}
.stationary-map-grid .plot-card{padding:11px 10px 10px}
.stationary-map-grid .legend{gap:7px 10px}
.stationary-explanation-grid{display:grid;grid-template-columns:1fr 1fr;gap:16px}
.stationary-selector{display:flex;align-items:center;gap:8px;flex-wrap:wrap;padding:9px 12px;border:1px solid var(--line);border-radius:9px;background:#fafaf7}
.stationary-selector-label{font-size:13px;font-weight:650;color:var(--muted);margin-right:4px}
.stationary-selector-status{margin-left:auto;font-size:13px;color:var(--teal);font-weight:650}
.stationary-selector button{height:31px;padding:0 10px;border:1px solid var(--line);border-radius:999px;background:#fff;font-size:13px;font-weight:700}
.stationary-selector button[aria-pressed=true]{background:var(--magenta);border-color:var(--magenta);color:#fff}
.stationary-conclusion{padding:15px 18px;border:1.5px solid #b8a4ca;border-left-width:5px;border-radius:10px;background:#f8f4fb;color:#352d3e;font-size:16px;line-height:1.6}
.stationary-conclusion b{color:var(--violet)}
.ratio-result{display:inline-block;margin-left:8px;color:var(--indigo);font-weight:650}
.math-inline{font-family:var(--serif);font-style:italic}
.true-field-key::before{color:var(--orange)}
.mean-field-key::before,.mean-gradient-key::before{color:var(--indigo)}
.variance-field-key::before,.variance-gradient-key::before{color:var(--violet)}
.acquisition-field-key::before{color:var(--magenta)}
.maximum-point-key::before{width:10px!important;height:10px;border:2px solid var(--orange)!important;border-radius:50%;background:#fff}
.minimum-point-key::before{width:10px!important;height:10px;border:2px solid var(--indigo)!important;background:#fff}
.saddle-point-key::before{width:9px!important;height:9px;border:2px solid var(--magenta)!important;background:#fff;transform:rotate(45deg)}
.stationary-selected-key::before{width:10px!important;height:10px;border:3px solid var(--teal)!important;border-radius:50%;background:#fff}
.generic-ellipse-key::before{color:var(--teal)}
.stationary-ellipse-key::before{color:var(--violet);border-top-style:dashed!important}
.acquisition-vector-key::before{color:var(--orange)}

/* SVG Elements — Computer Modern Serif for all numbers and math labels */
svg text{font-family:KaTeX_Main,Georgia,serif;fill:#26333a;font-size:var(--plot-text-size);font-weight:400}
svg .axis-label{font-family:KaTeX_Main,Georgia,serif;font-size:var(--plot-axis-label-size);font-weight:400;fill:#18222a}
.svg-axis-html{width:100%;height:100%;display:flex;align-items:center;justify-content:center;font-family:KaTeX_Main,Georgia,serif;font-size:15.5px;color:#18222a;white-space:nowrap;line-height:1}
.svg-axis-html .katex{font-size:1.02em!important}
.svg-vec-html{display:inline-flex;align-items:center;justify-content:center;font-family:KaTeX_Main,Georgia,serif;font-size:13.5px;line-height:1;white-space:nowrap}
svg .grid-line{stroke:#eceee9;stroke-width:1}
svg .axis-line{stroke:#bfc7c4;stroke-width:1.2}
svg .cursor-line{stroke:#147c74;stroke-dasharray:4 4;stroke-width:1.5}
svg .data-line{fill:none;stroke-linecap:round;stroke-linejoin:round;stroke-width:var(--plot-line-width)}
svg .band-edge{fill:none;stroke:#b8c5df;stroke-width:1.2;stroke-dasharray:3 3}
svg .selection-dot{stroke:white;stroke-width:2.4}
svg .tangent{stroke:var(--magenta);stroke-width:2.2;stroke-dasharray:5 3}
svg .true-process{stroke:#5e6a73;stroke-dasharray:6 4;stroke-width:2.3}
svg .heatmap-cell{stroke:none}
svg .vector-arrow{stroke-linecap:round}
svg .ellipse-stroke{fill:rgba(17,120,112,.1);stroke:var(--teal);stroke-width:2}
svg .region-box{fill:rgba(63,86,148,.07);stroke:var(--indigo);stroke-width:1.6;stroke-dasharray:4 3}
svg .region-fitr{fill:rgba(123,90,160,.09);stroke:var(--violet);stroke-width:2}
svg .region-turbo{fill:rgba(200,90,54,.07);stroke:var(--orange);stroke-width:1.8}
svg .bar-fill{opacity:.88}

/* Reading Notes & Supplementary */
.reading-notes{max-width:1360px;padding:0 68px;margin:0 auto 56px;display:grid;grid-template-columns:1fr 1.2fr;gap:64px}
.closing-note h2{font:normal clamp(26px,2.6vw,34px)/1.2 var(--serif);margin:10px 0 14px}
.closing-note p{font-size:17.5px;line-height:1.7;max-width:none;color:var(--ink)}
.notes-list details{border-bottom:1px solid var(--line);padding:14px 0}
.notes-list summary{cursor:pointer;font-size:17px;font-weight:600}
.notes-list p{font-size:16.5px;color:var(--muted);line-height:1.7;max-width:none}

.supplementary{max-width:1360px;padding:32px 68px 48px;margin:0 auto 36px;border-top:1px solid var(--line)}
.supplementary-badge{display:inline-block;font-size:11.5px;text-transform:uppercase;letter-spacing:.12em;color:var(--violet);border:1px solid #d8cfe6;background:#faf8fc;padding:6px 12px;border-radius:999px;margin-bottom:10px;font-weight:650}
.supplementary h2{font:normal clamp(24px,2.4vw,30px)/1.2 var(--serif);margin:0 0 16px}
.equation{background:#fff;border:1px solid var(--line);border-radius:8px;padding:14px;margin:12px 0;overflow-x:auto;font-size:19px;text-align:center}

footer{border-top:1px solid var(--line);padding:22px 4vw;display:flex;justify-content:space-between;gap:25px;color:var(--muted);font-size:14px}

@media(max-width:1280px){
  .symbol-badges{grid-template-columns:repeat(2,minmax(0,1fr))}
  .page0-layout{grid-template-columns:1fr 1fr}
  .bo-cycle-card{grid-column:1/-1}
  .stationary-map-grid{grid-template-columns:repeat(2,minmax(0,1fr))}
}
@media(max-width:1020px){
  .explorer.immersive-stage{padding:0 24px 24px}
  .deep-dive-grid,.page0-layout,.proof-two-col,.reading-notes,.stationary-explanation-grid{grid-template-columns:1fr}
  .edge-nav{width:46px;height:46px;min-width:46px;min-height:46px}
}
@media(max-width:760px){
  .site-header{padding:10px 18px;flex-wrap:wrap}
  .explorer.immersive-stage{padding:0 14px 20px}
  .plot-grid{grid-template-columns:1fr}
  .stationary-map-grid{grid-template-columns:1fr}
  .edge-nav-prev{left:6px}.edge-nav-next{right:6px}
  .reading-notes,.supplementary{padding-left:18px;padding-right:18px}
  footer{flex-direction:column;gap:6px}
}
@media(prefers-reduced-motion:reduce){
  *{scroll-behavior:auto!important;animation:none!important;transition:none!important}
}

/* Two HDBO comparisons replace the former four-panel proxy and scaling pages. */
.trace-key::before{color:var(--trace-blue);border-top-style:dashed!important}
svg .trace-axis-label{fill:var(--trace-blue)}
.trace-demo-details{margin:22px 0 4px;border-top:1px solid var(--line);padding:14px 0;font-size:13px;color:var(--muted)}
.trace-demo-details summary{cursor:pointer;color:var(--ink)}
.trace-demo-details p{max-width:1000px;line-height:1.7}

.fitr-explanation{padding:24px;background:#f1f6f4;border:1px solid #c8d9d3;border-radius:12px;min-width:0}
.fitr-explanation h3,.fitr-results h3{font:normal 25px Georgia,serif;margin:0 0 14px}
.fitr-explanation p,.fitr-results p{font-size:15px;line-height:1.7}
.fitr-explanation h3:not(:first-child){margin-top:26px}
.fitr-results{margin-top:28px;padding:26px 4px;border-top:1px solid var(--line)}
.fitr-table-scroll{overflow:auto}.fitr-results table{border-collapse:collapse;width:100%;font-size:14px;font-variant-numeric:tabular-nums}
.fitr-results th,.fitr-results td{padding:10px 12px;border-bottom:1px solid var(--line);text-align:right;white-space:nowrap}
.fitr-results th:first-child,.fitr-results td:first-child{text-align:left}
#fitr-current-center{font-size:13px;flex-basis:100%;color:var(--muted)}

.interaction-callout{padding:14px 18px;background:#f0f1f0;border:1px solid #dcdedb;border-radius:8px;font-size:14px;line-height:1.65;margin:0 0 18px;color:var(--ink)}

.fitr-results tr.fitr-better td:nth-child(n+3){font-weight:700}

.posterior-bridge{display:grid;grid-template-columns:minmax(230px,.8fr) minmax(0,1.4fr);gap:30px;align-items:center;margin:0 0 26px;padding:22px;background:#f0f4f3;border:1px solid #ccdcd7;border-radius:12px}
.posterior-bridge h3{font:normal 29px/1.2 Georgia,serif;margin:8px 0 14px}.posterior-bridge p{font-size:15px;line-height:1.7}
.posterior-bridge svg{width:100%;height:auto}.bridge-math{font-size:14px}.bridge-caption{font-family:Georgia,serif;font-size:13px}
.continue-fitr{display:inline-block;margin:24px 0;padding:14px 20px;background:#117870;color:white;border-radius:8px;text-decoration:none}
@media(max-width:760px){.posterior-bridge{grid-template-columns:1fr;padding:15px;gap:10px}.posterior-bridge h3{font-size:25px}}

.posterior-bridge > div:first-child > p:not(.eyebrow):not(.plot-footnote),
.posterior-bridge h3,.concept-copy{font:400 var(--concept-copy-size)/var(--concept-copy-leading) var(--sans);margin:8px 0 18px}
.posterior-bridge p.eyebrow{font-size:var(--concept-label-size);line-height:1.66}

.explore-choices{padding:20px 10px 35px}.explore-intro{color:var(--muted);font-size:17px;margin:0 0 28px}
.paper-choice-grid{display:grid;grid-template-columns:1fr 1fr;gap:24px}.paper-choice{display:flex;flex-direction:column;align-items:flex-start;min-height:310px;padding:34px;border:1px solid #c8d9d3;border-radius:22px;background:#f1f6f4;text-decoration:none;transition:transform .3s,box-shadow .3s}
.paper-choice h3{font:normal 42px Georgia,serif;margin:22px 0 14px}.paper-choice p{font-size:17px;line-height:1.7;max-width:420px}.choice-action{margin-top:auto;padding-top:28px;font-weight:600;color:var(--teal)}
.paper-choice:hover{transform:translateY(-4px);box-shadow:0 12px 28px #233b3310}.paper-choice.unavailable:hover{transform:none;box-shadow:none}.paper-choice.unavailable .choice-action{color:var(--muted)}
@media(max-width:760px){.paper-choice-grid{grid-template-columns:1fr}.paper-choice{padding:26px;min-height:255px}}

.linkedin-contact{display:inline-flex;align-items:center;gap:8px;border:1px solid var(--line);border-radius:8px;padding:7px 13px;background:white;text-decoration:none;font-size:14px;white-space:nowrap;transition:border-color .2s,background .2s}
.linkedin-contact:hover{border-color:#0a66c2;background:#f0f7fb}.linkedin-mark{display:inline-flex;align-items:center;justify-content:center;background:#0a66c2;color:white;font:bold 15px Arial,sans-serif;border-radius:3px;width:21px;height:21px}

.stage-workspace{overflow-x:clip}
@media(max-width:760px){.site-header nav{flex-wrap:wrap;gap:10px 14px;max-width:100%}}