:root{
  --ink:#0d2340;
  --body:#536a80;
  --muted:#718397;
  --line:#d7e3e9;
  --paper:#ffffff;
  --wash:#f3f8fa;
  --navy:#0b2942;
  --teal:#0d9f99;
  --teal-dark:#087670;
  --teal-soft:#e7f7f5;
  --blue:#3d78a8;
  --orange:#e08a37;
  --purple:#7656a6;
  --coral:#d85e62;
  --shadow:0 18px 48px rgba(13,35,64,.09);
}
*{box-sizing:border-box}
html{scroll-behavior:smooth}
body{margin:0;background:var(--wash);color:var(--ink);font-family:Inter,"Helvetica Neue",Arial,sans-serif}
button,input{font:inherit}
a{color:inherit}
.skip-link{position:fixed;z-index:1000;left:16px;top:12px;transform:translateY(-180%);padding:10px 14px;border-radius:8px;background:var(--navy);color:#fff;font-weight:750;text-decoration:none}
.skip-link:focus{transform:none}
.eyebrow{margin:0;color:var(--teal);font-size:.72rem;font-weight:800;letter-spacing:.12em;text-transform:uppercase}
.studio-header{padding:22px max(24px,calc((100vw - 1360px)/2)) 0;background:linear-gradient(136deg,#071f35 0%,#0b3049 58%,#0d484f 100%);color:#fff}
.studio-header__nav{display:flex;align-items:center;justify-content:space-between;gap:16px;padding-bottom:22px;border-bottom:1px solid rgba(255,255,255,.16)}
.studio-header__nav a{color:#c6e4e4;font-size:.78rem;font-weight:730;text-decoration:none}
.studio-header__nav a:hover,.studio-header__nav a:focus-visible{color:#fff;text-decoration:underline;text-underline-offset:4px}
.studio-header__copy{display:grid;grid-template-columns:minmax(0,1fr) minmax(320px,.78fr);gap:48px;align-items:end;padding:52px 0 44px}
.studio-header .eyebrow{color:#73d2cd}
.studio-header h1{max-width:820px;margin:.55rem 0 0;font-size:clamp(2.65rem,5vw,5.35rem);font-weight:760;line-height:.92;letter-spacing:-.055em}
.studio-header__copy>p{max-width:620px;margin:0;color:#c0d1dc;font-size:1rem;line-height:1.7}
.scale-ribbon{display:grid;grid-template-columns:auto 1fr auto 1fr auto 1fr auto 1fr auto;align-items:center;gap:12px;padding:17px 0;border-top:1px solid rgba(255,255,255,.16);color:#c6e4e4;font-size:.68rem;font-weight:780;letter-spacing:.09em;text-transform:uppercase}
.scale-ribbon i{height:1px;background:linear-gradient(90deg,rgba(115,210,205,.2),#73d2cd,rgba(115,210,205,.2))}
.studio-shell{display:grid;grid-template-columns:280px minmax(0,1fr);max-width:1440px;margin:0 auto;padding:32px 24px 68px;gap:18px;align-items:start}
.app-index{position:sticky;top:96px;max-height:calc(100vh - 114px);overflow:auto;padding:18px;border:1px solid var(--line);border-radius:18px;background:#fff;box-shadow:0 10px 28px rgba(13,35,64,.06)}
.app-index__heading,.panel-heading{display:flex;align-items:center;justify-content:space-between;gap:12px;color:var(--muted);font-size:.64rem;font-weight:800;letter-spacing:.1em;text-transform:uppercase}
.app-index__heading strong{color:var(--teal-dark);font-size:.7rem}
.app-search{display:grid;gap:7px;margin:17px 0 14px;color:var(--body);font-size:.7rem;font-weight:720}
.app-search input{width:100%;min-height:42px;padding:0 11px;border:1px solid #c7d8e1;border-radius:10px;background:#fff;color:var(--ink);font-size:.84rem}
#app-navigation{display:grid;gap:4px}
.app-nav-button{display:grid;grid-template-columns:29px 1fr;gap:8px;align-items:center;width:100%;min-height:43px;padding:7px 8px;border:0;border-radius:9px;background:transparent;color:var(--body);text-align:left;cursor:pointer}
.app-nav-button span{color:#90a0ae;font-size:.62rem;font-weight:800}
.app-nav-button strong{font-size:.74rem;font-weight:700;line-height:1.25}
.app-nav-button:hover{background:#f1f7f7;color:var(--ink)}
.app-nav-button[aria-current="true"]{background:var(--teal-soft);color:var(--teal-dark)}
.app-nav-button[aria-current="true"] span{color:var(--teal-dark)}
.app-nav-empty{margin:12px 4px;color:var(--muted);font-size:.76rem;line-height:1.5}
.app-index__coverage{display:grid;grid-template-columns:auto 1fr;gap:9px;align-items:center;margin:16px 0 0;padding-top:15px;border-top:1px solid var(--line)}
.app-index__coverage strong{font-size:1.45rem;color:var(--teal-dark)}
.app-index__coverage span{color:var(--muted);font-size:.68rem;line-height:1.3}
.workbench{min-width:0;border:1px solid var(--line);border-radius:20px;background:var(--paper);box-shadow:var(--shadow);overflow:hidden}
.workbench__header{display:grid;grid-template-columns:minmax(0,1fr) auto;gap:24px;align-items:start;padding:28px 30px;border-bottom:1px solid var(--line)}
.workbench__header h2{margin:.45rem 0 .6rem;font-size:clamp(1.75rem,3vw,2.65rem);line-height:1.02;letter-spacing:-.04em}
.workbench__header>div>p:last-child{max-width:850px;margin:0;color:var(--body);font-size:.9rem;line-height:1.6}
.evidence-status{display:inline-flex;align-items:center;min-height:32px;padding:7px 11px;border:1px solid #b9d9d6;border-radius:999px;background:var(--teal-soft);color:var(--teal-dark);font-size:.65rem;font-weight:800;letter-spacing:.06em;text-transform:uppercase;white-space:nowrap}
.workbench__body{display:grid;grid-template-columns:280px minmax(0,1fr);min-height:600px}
.parameter-panel{padding:24px;border-right:1px solid var(--line);background:#f8fbfc}
.panel-heading button{padding:0;border:0;background:transparent;color:var(--teal-dark);font-size:.68rem;font-weight:800;cursor:pointer}
#app-controls{display:grid;gap:19px;margin-top:24px}
.app-control{display:grid;gap:7px;color:var(--body);font-size:.72rem;font-weight:720}
.app-control__line{display:flex;align-items:baseline;justify-content:space-between;gap:8px}
.app-control output{color:var(--ink);font-size:.79rem;font-weight:800;font-variant-numeric:tabular-nums}
.app-control input[type="range"]{width:100%;accent-color:var(--teal)}
.app-control select,.app-control input[type="number"]{width:100%;height:42px;padding:0 10px;border:1px solid #c7d8e1;border-radius:9px;background:#fff;color:var(--ink);font-size:.8rem}
.data-notice{display:grid;gap:5px;margin:26px 0 0;padding-top:18px;border-top:1px solid var(--line)}
.data-notice strong{color:var(--coral);font-size:.65rem;letter-spacing:.08em;text-transform:uppercase}
.data-notice span{color:var(--muted);font-size:.7rem;line-height:1.5}
.visual-panel{min-width:0;padding:24px 28px 28px}
.visual-panel__heading{display:flex;align-items:flex-start;justify-content:space-between;gap:18px;margin-bottom:18px}
.visual-panel__heading span,.evidence-panel>div>span{color:var(--muted);font-size:.63rem;font-weight:800;letter-spacing:.1em;text-transform:uppercase}
.visual-panel__heading h3,.evidence-panel h3{margin:.35rem 0 0;font-size:1.05rem;line-height:1.3}
.visual-panel__heading a{color:var(--teal-dark);font-size:.7rem;font-weight:760;text-decoration:none;white-space:nowrap}
.visual-panel__heading a:hover,.visual-panel__heading a:focus-visible{text-decoration:underline;text-underline-offset:4px}
.app-visual{position:relative;min-height:356px;border-bottom:1px solid var(--line);background:linear-gradient(180deg,#fbfdfe,#fff)}
.phase-surface>div{max-width:620px;text-align:center}
.phase-surface h3{margin:.65rem 0;font-size:clamp(1.35rem,2.5vw,2.15rem);line-height:1.1;letter-spacing:-.03em}
.phase-surface p{margin:0 auto 18px;color:var(--body);font-size:.82rem;line-height:1.65}
.studio-launch{display:inline-flex;align-items:center;justify-content:center;min-height:42px;padding:10px 15px;border-radius:10px;background:var(--teal);color:#fff;font-size:.74rem;font-weight:780;text-decoration:none}
.studio-launch:hover,.studio-launch:focus-visible{background:var(--teal-dark)}
.studio-launch--compact{width:100%;background:var(--navy)}
.app-visual svg{display:block;width:100%;height:auto;min-height:340px;overflow:visible}
.plot-axis,.plot-grid,.plot-reference,.plot-primary,.plot-secondary,.plot-threshold{fill:none;vector-effect:non-scaling-stroke}
.plot-axis{stroke:#8294a4;stroke-width:1.2}
.plot-grid{stroke:#e2eaee;stroke-width:1}
.plot-reference{stroke:#93a4b1;stroke-width:2}
.plot-primary{stroke:var(--teal);stroke-width:3}
.plot-secondary{stroke:var(--orange);stroke-width:2.5}
.plot-threshold{stroke:var(--coral);stroke-width:1.5;stroke-dasharray:6 5}
.plot-area{fill:rgba(13,159,153,.1)}
.plot-area-secondary{fill:rgba(224,138,55,.12)}
.plot-point{fill:var(--teal);stroke:#fff;stroke-width:1.5}
.plot-point.is-reference{fill:#9aaab6}
.plot-point.is-selected{fill:var(--coral)}
.plot-node{fill:var(--teal-soft);stroke:var(--teal);stroke-width:2}
.plot-edge{stroke:#9fb2bf;stroke-width:2}
.plot-edge.is-active{stroke:var(--teal);stroke-width:3}
.plot-text{fill:var(--ink);font-size:12px;font-weight:650}
.plot-muted{fill:var(--muted);font-size:11px}
.plot-label{fill:var(--ink);font-size:12px;font-weight:760}
.plot-state{fill:var(--teal-soft);stroke:var(--teal);stroke-width:2}
.plot-state.is-warning{fill:#fff2df;stroke:var(--orange)}
.plot-state.is-alert{fill:#fdebed;stroke:var(--coral)}
.pixel-grid{display:grid;grid-template-columns:repeat(16,minmax(12px,1fr));gap:3px;max-width:680px;margin:18px auto;padding:24px}
.pixel-grid span{aspect-ratio:1;border-radius:3px;background:color-mix(in srgb,var(--teal) calc(var(--signal)*1%),#edf2f4);outline:1px solid rgba(13,35,64,.04)}
.pixel-grid span.is-positive{outline:2px solid var(--orange)}
.phase-surface{display:grid;place-items:center;min-height:350px;padding:18px}
.metric-strip{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:1px;margin-top:18px;background:var(--line)}
.metric-strip article{min-height:90px;padding:14px;background:#fff}
.metric-strip span{display:block;color:var(--muted);font-size:.63rem;font-weight:760;letter-spacing:.06em;text-transform:uppercase}
.metric-strip strong{display:block;margin:.45rem 0 .25rem;color:var(--ink);font-size:1.2rem;line-height:1.15;font-variant-numeric:tabular-nums}
.metric-strip small{color:var(--muted);font-size:.65rem;line-height:1.35}
.app-insight{margin:16px 0 0;color:var(--body);font-size:.82rem;line-height:1.6}
.evidence-panel{display:grid;grid-template-columns:1.2fr .8fr;gap:36px;padding:26px 30px 30px;border-top:1px solid var(--line);background:#fbfdfe}
.method-coverage{display:flex;flex-wrap:wrap;gap:6px;margin-top:14px}
.method-coverage a{display:inline-flex;padding:6px 9px;border:1px solid #cadbe2;border-radius:999px;background:#fff;color:#37536b;font-size:.65rem;font-weight:680;text-decoration:none}
.method-coverage a:hover,.method-coverage a:focus-visible{border-color:var(--teal);color:var(--teal-dark)}
.evidence-panel__boundary{padding-left:30px;border-left:1px solid var(--line)}
.evidence-panel__boundary p{margin:.55rem 0 14px;color:var(--body);font-size:.78rem;line-height:1.6}
.stage-links{display:flex;flex-wrap:wrap;gap:7px}
.stage-links a{color:var(--teal-dark);font-size:.68rem;font-weight:760;text-decoration:none}
.stage-links a:hover,.stage-links a:focus-visible{text-decoration:underline;text-underline-offset:4px}
.studio-notes{display:grid;grid-template-columns:minmax(0,.85fr) minmax(500px,1.15fr);gap:48px;padding:58px max(24px,calc((100vw - 1240px)/2));background:var(--navy);color:#fff}
.studio-notes .eyebrow{color:#73d2cd}
.studio-notes h2{max-width:620px;margin:.55rem 0 0;font-size:clamp(1.8rem,3vw,3rem);line-height:1.04;letter-spacing:-.04em}
.studio-notes ol{display:grid;grid-template-columns:repeat(3,1fr);gap:10px;margin:0;padding:0;list-style:none;counter-reset:steps}
.studio-notes li{min-height:155px;padding:18px;border:1px solid #315067;border-radius:15px;background:#0e304a;counter-increment:steps}
.studio-notes li:before{content:"0" counter(steps);display:block;margin-bottom:30px;color:#73d2cd;font-size:.65rem;font-weight:800;letter-spacing:.08em}
.studio-notes li strong{display:block;margin-bottom:8px;font-size:.86rem}
.studio-notes li span{color:#b9cad7;font-size:.72rem;line-height:1.5}
.studio-footer{display:flex;align-items:center;justify-content:space-between;gap:24px;padding:24px max(24px,calc((100vw - 1240px)/2));background:#071f35;color:#aebfcb;font-size:.7rem}
.studio-footer nav{display:flex;flex-wrap:wrap;gap:18px}
.studio-footer a{color:#c6e4e4;text-decoration:none}
@media(max-width:1100px){.studio-shell{grid-template-columns:minmax(0,1fr)}.app-index{position:static;max-height:none}.app-index nav{grid-template-columns:repeat(3,minmax(0,1fr))}.workbench__body{grid-template-columns:240px minmax(0,1fr)}.studio-notes{grid-template-columns:1fr}.studio-notes ol{max-width:800px}}
@media(max-width:850px){.studio-header__copy{grid-template-columns:1fr;gap:24px}.studio-shell{grid-template-columns:1fr}.app-index{position:static;max-height:none}.app-index nav{grid-template-columns:repeat(2,minmax(0,1fr))}.workbench__body{grid-template-columns:1fr}.parameter-panel{border-right:0;border-bottom:1px solid var(--line)}#app-controls{grid-template-columns:repeat(2,minmax(0,1fr))}.evidence-panel{grid-template-columns:1fr}.evidence-panel__boundary{padding-left:0;border-left:0;border-top:1px solid var(--line);padding-top:24px}}
@media(max-width:600px){.studio-header{padding-left:18px;padding-right:18px}.studio-header__nav{align-items:flex-start}.studio-header__copy{padding-top:38px}.scale-ribbon{grid-template-columns:auto 1fr auto 1fr auto}.scale-ribbon span:nth-of-type(n+4),.scale-ribbon i:nth-of-type(n+3){display:none}.studio-shell{padding:18px 12px 46px}.app-index nav{grid-template-columns:1fr}.workbench__header{grid-template-columns:1fr;padding:23px 20px}.evidence-status{justify-self:start}.parameter-panel,.visual-panel,.evidence-panel{padding-left:20px;padding-right:20px}#app-controls{grid-template-columns:1fr}.visual-panel__heading{display:grid}.visual-panel__heading a{white-space:normal}.app-visual{min-height:300px}.app-visual svg{min-height:285px}.metric-strip{grid-template-columns:1fr}.metric-strip article{min-height:0}.studio-notes{padding-top:42px;padding-bottom:42px}.studio-notes ol{grid-template-columns:1fr}.studio-notes li{min-height:0}.studio-notes li:before{margin-bottom:16px}.studio-footer{align-items:flex-start;flex-direction:column}}
@media(prefers-reduced-motion:reduce){html{scroll-behavior:auto}}



/* v138 refinement: progressive depth, readable controls and bounded mobile navigation */
.app-index__heading,.panel-heading{font-size:.7rem}
.app-search{font-size:.78rem}
.app-nav-button{min-height:48px}
.app-nav-button strong{font-size:.82rem}
.app-control{font-size:.8rem}
.app-control output{font-size:.84rem}
.visual-panel__heading span,.evidence-panel>div>span{font-size:.7rem}
.metric-strip span{font-size:.7rem}
.metric-strip small{font-size:.73rem}
.app-insight{font-size:.88rem}
.method-coverage a{align-items:center;min-height:38px;padding:7px 10px;font-size:.74rem}
.evidence-panel__boundary p{font-size:.84rem}
.stage-links a{font-size:.76rem}
.app-nav-button:focus-visible,
.panel-heading button:focus-visible,
.app-control input:focus-visible,
.app-control select:focus-visible,
.method-coverage a:focus-visible,
.stage-links a:focus-visible,
.studio-launch:focus-visible{
  outline:3px solid #69a5ff;
  outline-offset:3px;
}
.method-coverage details{flex:1 0 100%;margin-top:4px}
.method-coverage summary{width:max-content;max-width:100%;padding:8px 2px;color:var(--teal-dark);font-size:.76rem;font-weight:780;line-height:1.35;cursor:pointer}
.method-coverage summary:focus-visible{outline:3px solid #69a5ff;outline-offset:3px;border-radius:4px}
.method-coverage details>div{display:flex;flex-wrap:wrap;gap:6px;padding-top:6px}
#app-navigation{scrollbar-gutter:stable}
@media(max-width:600px){
  #app-navigation{max-height:320px;overflow:auto;overscroll-behavior:contain;padding-right:4px}
  .app-index{padding:16px}
  .app-index__coverage{margin-top:13px}
}