:root{font:14px/1.55 ui-sans-serif,system-ui,-apple-system,BlinkMacSystemFont,"Segoe UI",sans-serif;color:#192b40;background:#f6f5f1;--line:#dedfdc;--muted:#626f7d;--green:#335cff;--red:#c94f52;--amber:#b77920}*{box-sizing:border-box}body{margin:0}a{color:inherit;text-decoration:none}a:hover{color:var(--green)}header{display:flex;align-items:center;gap:30px;padding:21px 4vw;border-bottom:1px solid var(--line);background:#fff}.brand{font-size:18px;font-weight:650;white-space:nowrap}nav{display:flex;gap:22px;flex:1;flex-wrap:wrap}nav a,.method-link{font-size:12px;color:var(--muted)}nav a[aria-current=page]{color:var(--green);font-weight:650}main{max-width:1120px;padding:48px 28px 70px;margin:auto}.eyebrow{font-size:10px;letter-spacing:.15em;color:var(--muted);text-transform:uppercase}h1{font-size:clamp(29px,4vw,46px);letter-spacing:-.045em;font-weight:500;line-height:1.15;margin:17px 0}h2{font-size:18px;font-weight:550;letter-spacing:-.02em}.intro{max-width:670px;font-size:15px;color:var(--muted);line-height:1.7}.status{font-size:11px;color:var(--muted);min-height:17px}.controls{display:flex;gap:16px;flex-wrap:wrap;align-items:end;margin:26px 0}label{display:grid;gap:7px;font-size:11px;color:var(--muted)}select,input,button,textarea{font:inherit;color:inherit}select,input{max-width:100%;border:1px solid var(--line);border-radius:6px;background:#fff;min-height:36px;padding:7px 10px}button,.button{border:1px solid var(--line);background:#fff;border-radius:6px;padding:8px 13px;cursor:pointer;font-size:12px}button:hover,.button:hover{border-color:#92a9ed}button.primary{background:#2549c6;color:#fff;border-color:#2549c6}button:disabled{opacity:.45;cursor:default}.fine{font-size:12px;line-height:1.7;color:var(--muted)}.visual{display:block;width:100%;height:auto;margin:26px 0}svg text{font:12px ui-sans-serif,system-ui;fill:#354c6c}svg .edge{stroke:#ccd7e9;fill:none;stroke-width:1.5}svg .node{cursor:pointer}svg .node rect,svg .node circle{stroke:#8d9fbc;stroke-width:1.3;fill:#fff}svg .node.bad rect,svg .node.bad circle{stroke:var(--red);fill:#fff0ee}svg .node.warn:not(.bad) rect{stroke:var(--amber);fill:#fff3df}svg .ghost{stroke-dasharray:4 5;opacity:.65}.cards{display:grid;grid-template-columns:repeat(3,1fr);gap:16px;margin:28px 0}.card{background:#fff;border:1px solid var(--line);border-radius:8px;padding:20px}.card small{display:block;color:var(--muted);font-size:11px}.card strong{display:block;font-size:23px;font-weight:500;margin-top:8px}.list{margin-top:28px;border-top:1px solid var(--line)}.list>button{display:flex;justify-content:space-between;align-items:center;text-align:left;border:0;border-bottom:1px solid var(--line);border-radius:0;background:transparent;width:100%;padding:18px 3px;gap:18px}.list b{font-weight:500}.badge{font-size:10px;padding:4px 7px;background:#edf2ff;border-radius:4px;color:#365cb3;white-space:nowrap}.badge.hypothesis{background:#fff3df;color:#a46d1a}details{border-top:1px solid var(--line);padding:17px 0;margin-top:18px}summary{cursor:pointer;font-size:12px}table{font-size:11px;border-collapse:collapse;width:100%;margin:20px 0}th,td{text-align:left;padding:12px 9px;border-bottom:1px solid var(--line)}th{font-weight:550}.table-scroll{overflow-x:auto;max-width:100%}textarea{width:100%;height:230px;resize:vertical;padding:15px;border:1px solid var(--line);border-radius:8px;background:#fff;font-family:ui-monospace,monospace;font-size:11px}.drop{background:#fff;border:1px dashed #a9bbab;border-radius:8px;padding:28px;margin:25px 0}.next{margin-top:45px;padding-top:20px;border-top:1px solid var(--line);display:flex;gap:22px;justify-content:space-between;font-size:12px;color:var(--green)}footer{display:flex;justify-content:space-between;padding:22px 4vw;border-top:1px solid var(--line);font-size:10px;color:var(--muted)}dialog{width:min(820px,94vw);max-height:82vh;overflow:auto;border:1px solid var(--line);border-radius:10px;padding:22px}dialog::backdrop{background:#192b4055}.dialog-head{display:flex;justify-content:space-between;align-items:center;gap:20px}pre{white-space:pre-wrap;overflow-wrap:anywhere;font:11px/1.7 ui-monospace,monospace}a:focus-visible,button:focus-visible,select:focus-visible,input:focus-visible,textarea:focus-visible{outline:2px solid #386fce;outline-offset:3px}[hidden]{display:none!important}.notice{border-left:2px solid #94a8d2;padding:8px 16px;font-size:12px;color:var(--muted)}.step-link{display:block;border-top:1px solid var(--line);padding:22px 0;font-size:17px}.step-link small{display:block;color:var(--muted);font-size:12px;margin-top:5px}@media(max-width:700px){header{gap:13px;flex-wrap:wrap;padding:16px}nav{order:3;flex-basis:100%;gap:18px}.method-link{margin-left:auto}main{padding:30px 16px 48px}.intro{font-size:14px}.cards{grid-template-columns:1fr}.controls{gap:10px}.controls label{flex:1;min-width:135px}.controls select{width:100%}table{min-width:650px}.visual text{font-size:22px}.visual .small{font-size:19px}.next{flex-wrap:wrap}}

.replay-current rect{stroke:#335cff!important;stroke-width:2.5!important;filter:drop-shadow(0 0 5px #335cff44)}.replay-edge{stroke:#335cff!important;stroke-width:2.5!important;stroke-dasharray:1!important;animation:draw-route .9s ease both}.caption{font-size:12px;min-height:24px;color:var(--muted)}@keyframes draw-route{from{stroke-dashoffset:1}to{stroke-dashoffset:0}}@media(prefers-reduced-motion:reduce){*{animation:none!important;transition:none!important}}

/* One calm visual language across the guided demo. */
:root{font-family:"Avenir Next",Avenir,-apple-system,BlinkMacSystemFont,"Segoe UI",sans-serif;font-size:15px;--line:#dedfdc;--muted:#626f7d;--green:#315bce}
header{gap:32px;background:#fdfdfa;padding:20px max(24px,4vw)}.brand{letter-spacing:-.04em;font-size:20px}.brand span{color:var(--green)}nav{gap:30px}nav a{font-size:11px;color:#86909a;display:flex;gap:8px;align-items:baseline}nav a span{font-size:13px;color:var(--muted)}nav a[aria-current=page] span{color:var(--green)}
main{max-width:1180px;padding-top:40px}h1{font-family:Georgia,"Times New Roman",serif;font-weight:400;letter-spacing:-.035em;font-size:clamp(32px,4vw,48px);line-height:1.16;margin:15px 0}.intro{max-width:720px;font-size:16px;line-height:1.65}.eyebrow{font-size:10px;letter-spacing:.13em}.status{font-size:12px;color:#75808b;margin-top:20px}.controls{gap:14px;margin:24px 0;position:relative}label{font-size:12px}button,.button,select,input{min-height:40px;border-radius:8px}button,.button{font-size:13px}button.primary{background:#254bbb;border-color:#254bbb}.fine{font-size:13px}.card{border-radius:12px;padding:22px;background:#fdfdfa}.card small{font-size:12px}.card strong{font-size:27px;font-variant-numeric:tabular-nums}.cards{gap:14px;margin:22px 0}.notice{border-left-color:#315bce;padding:12px 17px;background:#eef1f8;border-radius:0 8px 8px 0;line-height:1.7;font-size:13px}.caption{font-size:13px;line-height:1.7}.visual{background:#fdfdfa;border:1px solid var(--line);border-radius:14px;padding:12px;margin:20px 0 12px}svg text{font-family:"Avenir Next",Avenir,system-ui,sans-serif}.chart-guide{text-align:center;color:var(--muted);font-size:12px;margin:8px 0 22px}.next{font-size:13px}summary{font-size:13px}dialog{border-radius:16px;box-shadow:0 18px 80px #192b4020}dialog::backdrop{background:#192b4055;backdrop-filter:blur(3px)}.dialog-head h2{font-family:Georgia,serif;font-size:25px;font-weight:400}.skip-link{position:absolute;top:-100px;left:16px;z-index:10;background:#fff;padding:12px}.skip-link:focus{top:10px}
.more-nav{position:relative;border:0;margin:0;padding:0}.more-nav summary{list-style:none;min-height:40px;display:flex;align-items:center;gap:14px;color:var(--muted);padding:0 10px}.more-nav summary::after{content:'⌄'}.more-nav summary::-webkit-details-marker{display:none}.more-nav>div{position:absolute;right:0;top:45px;z-index:20;min-width:235px;border:1px solid var(--line);background:#fff;border-radius:12px;padding:9px;box-shadow:0 12px 32px #192b4014}.more-nav a,.more-nav button{display:block;width:100%;text-align:left;font-size:13px;padding:10px 12px;border:0;background:transparent;border-radius:6px;white-space:nowrap}.more-nav a:hover,.more-nav button:hover{background:#eef1f8}.more-nav a[aria-current=page]{color:var(--green)}
.study-settings{order:10;margin:0 0 0 auto;padding:0;border:0;align-self:end}.study-settings>summary{padding:10px 12px;border:1px solid var(--line);border-radius:8px;background:#fdfdfa;min-height:40px;color:var(--muted)}.settings-fields{position:absolute;right:0;top:100%;z-index:9;display:grid;gap:14px;min-width:290px;padding:18px;background:#fff;border:1px solid var(--line);border-radius:12px;box-shadow:0 12px 32px #192b4014}.settings-fields select{width:100%}
@media(max-width:700px){header{padding:16px 18px;gap:14px}.brand{font-size:19px}nav{order:3;gap:0;justify-content:space-between}nav a{gap:6px}nav a span{font-size:12px}.more-nav{margin-left:auto}.more-nav summary{font-size:12px}main{padding:28px 18px 45px}h1{font-size:35px}.intro{font-size:15px}.controls label{min-width:125px}.controls{gap:12px}.controls .primary{order:-1;flex-basis:100%}.study-settings{margin-left:0;flex-basis:100%}.study-settings summary{width:100%}.settings-fields{position:static;box-shadow:none;margin-top:8px;min-width:0}.cards{grid-template-columns:1fr;gap:9px}.card{display:flex;align-items:center;justify-content:space-between;gap:16px;padding:17px}.card small{max-width:60%}.card strong{font-size:23px;margin:0;white-space:nowrap}.visual{padding:4px}.fine{font-size:12px}.next{gap:18px}.more-nav>div{right:0}}

.result-note{border-top:1px solid var(--line);padding:18px 0 0;font-size:14px;color:#364a65;line-height:1.7}.caption[hidden]{display:none}#demo-caption{margin:0 0 12px}.more-nav:focus-within>summary{color:var(--green)}
.drop{background:#fdfdfa;border-color:#b9c3ce;padding:24px}.drop h2{font-family:Georgia,serif;font-size:23px;font-weight:400}.drop .controls .primary{order:0}.drop select{min-width:220px}input[type=file]{font-size:12px;width:100%;background:#fff;padding:10px}input[type=file]::file-selector-button{font:inherit;background:#eef1f8;color:#192b40;border:0;border-radius:5px;padding:8px 12px;margin-right:12px;cursor:pointer}

.sample-actions{display:flex;flex-basis:100%;gap:12px;align-items:end;flex-wrap:wrap}.sample-actions input[type=file]{max-width:320px;min-height:40px;padding:4px 8px}.sample-actions select{min-width:230px}.sample-actions .button{min-height:40px;display:flex;align-items:center}.sample-actions .primary{order:0;flex-basis:auto}@media(max-width:700px){.sample-actions label{flex:1;min-width:180px}.sample-actions input[type=file]{max-width:none}.sample-actions select{min-width:0;width:100%}.sample-actions .primary{order:0;flex-basis:auto}}

/* Product film keeps native playback and keyboard controls. */
main>video{display:block;width:100%;height:auto;background:#182c3a;border:1px solid var(--line,#d9dfdc);border-radius:16px;margin:32px 0;}