@import url('https://fonts.googleapis.com/css2?family=DM+Sans:wght@400;500;600;700&family=Source+Serif+4:wght@400;500;600&display=swap');
:root{--ink:#172a3c;--muted:#526576;--blue:#265ece;--light:#eef4fc;--line:#d8e1ed;--paper:#fff;--green:#167458;--red:#ac3c42}*{box-sizing:border-box}html{scroll-behavior:smooth;scroll-padding-top:90px}body{margin:0;background:var(--paper);color:var(--ink);font:17px/1.65 'DM Sans',sans-serif}a{color:var(--blue);text-underline-offset:4px}button{font:inherit;cursor:pointer}button:focus-visible,a:focus-visible{outline:3px solid #dc8800;outline-offset:5px}header{height:80px;max-width:1240px;margin:auto;padding:0 32px;display:flex;align-items:center;justify-content:space-between;border-bottom:1px solid var(--line)}.wordmark{font-weight:700;color:var(--ink);text-decoration:none;font-size:20px}nav{display:flex;gap:30px}nav a{font-size:15px;text-decoration:none;color:var(--muted)}nav a:hover{color:var(--blue)}main{max-width:1180px;margin:auto;padding:0 32px}section{padding:78px 0;border-bottom:1px solid var(--line)}.intro{text-align:center;padding:72px 0 0;border:0}.edition{font-size:15px;color:var(--muted);margin:0 0 20px}h1,h2,h3,p{margin-top:0}h1,h2{font-family:'Source Serif 4',Georgia,serif;font-weight:500}h1{font-size:clamp(42px,5.5vw,72px);letter-spacing:-2px;line-height:1.12;margin-bottom:25px}h2{font-size:38px;line-height:1.22;letter-spacing:-.8px;margin-bottom:14px}h3{font-size:20px;line-height:1.4;margin-bottom:14px}.lead{font-size:21px;line-height:1.6;max-width:700px;margin:0 auto 14px}.intro-note{color:var(--muted);font-size:16px}.study-strip{display:flex;justify-content:center;gap:50px;margin-top:45px;padding:24px 0;border-block:1px solid var(--line);font-size:15px;color:var(--muted)}.study-strip b{display:block;color:var(--ink);font-size:18px}.section-heading{display:flex;gap:22px;align-items:flex-start;margin-bottom:34px}.section-number{font-size:16px;color:var(--blue);padding-top:9px}.section-heading p{color:var(--muted);margin-bottom:0}.loop{background:var(--light);padding:36px 30px 0;border-radius:12px}.loop-track{display:flex;align-items:center;gap:8px}.step{flex:1;border:1px solid #c7d5e9;background:white;border-radius:7px;text-align:left;padding:17px 14px;min-height:145px;color:var(--ink);transition:border-color .15s,background .15s}.step span{display:block;font-size:14px;color:var(--blue);margin-bottom:14px}.step b{display:block;font-size:16px;line-height:1.35;margin-bottom:5px}.step small{font-size:14px;color:var(--muted)}.step.active{background:var(--blue);border-color:var(--blue);color:white}.step.active span,.step.active small{color:#e2ebff}.loop-track i{color:#8097b4;font-style:normal}.return-path{margin:0 50px 25px;border:1px solid #a8bcda;border-top:0;border-radius:0 0 12px 12px;height:37px;text-align:center;position:relative}.return-path span{font-size:13px;color:var(--muted);background:var(--light);padding:0 10px;position:relative;top:23px}.step-explanation{display:grid;grid-template-columns:170px 1fr;gap:25px;padding:33px 0 28px;min-height:210px}.step-explanation>span{font-size:14px;color:var(--blue);padding-top:4px}.step-explanation h3{font-size:23px;margin-bottom:9px}.step-explanation p{margin:0;max-width:750px;color:var(--muted)}.method-columns{display:grid;grid-template-columns:repeat(3,1fr);gap:34px;margin-top:35px}.method-columns p{font-size:16px;color:var(--muted);margin:0}.rule{display:grid;grid-template-columns:150px 1fr;gap:30px;border-left:3px solid var(--blue);padding:20px 24px;background:#f8fafc;margin-top:32px;font-size:15px}.rule p{margin:0;color:var(--muted)}.run-status{display:flex;align-items:center;gap:24px;margin-bottom:38px}.status-label{display:inline-block;font-size:14px;background:var(--light);color:var(--blue);border-radius:4px;padding:5px 12px;white-space:nowrap}.run-status p{font-size:15px;color:var(--muted);margin:0}.results-layout{display:grid;grid-template-columns:1.45fr 1fr;gap:65px}.chart-note,.footnote{font-size:14px;color:var(--muted)}.score-chart{min-height:100px;padding:12px 0 20px}.bar-row{display:grid;grid-template-columns:80px 1fr 80px;align-items:center;gap:15px;font-size:14px;margin:16px 0}.bar-track{height:24px;background:#edf1f7;border-radius:3px;overflow:hidden}.bar-fill{height:100%;background:var(--blue)}.bar-track.pending{background:repeating-linear-gradient(135deg,#edf1f7,#edf1f7 5px,#fafbfd 5px,#fafbfd 10px)}.bar-value{text-align:right;color:var(--muted)}.external{border-top:1px dashed #9eafc4;padding-top:20px}.external>div{display:flex;align-items:baseline;gap:20px}.external b{font-size:28px;font-weight:500;color:var(--muted)}.external span{font-size:14px;color:var(--muted)}.external p{font-size:14px;color:var(--muted);margin:8px 0 0}.task{border-top:1px solid var(--line);padding:16px 0}.task b{font-size:18px}.task p{font-size:15px;color:var(--muted);margin:6px 0}.task span{font-size:13px;color:var(--blue)}.scope-note{font-size:14px;color:var(--muted);margin:15px 0 0}.table-wrap{overflow-x:auto;margin-top:32px}table{border-collapse:collapse;width:100%;font-size:15px;text-align:left}caption{text-align:left;font-weight:600;font-size:19px;padding:0 0 16px}th{font-weight:500;color:var(--muted);background:#f7f9fc}th,td{padding:15px 18px;border-bottom:1px solid var(--line);white-space:nowrap}.tag{font-size:13px;border-radius:4px;background:var(--light);padding:5px 9px;color:var(--blue)}.tag.kept{color:var(--green);background:#e9f5ef}.tag.discarded{color:var(--red);background:#fbeeee}.round-tabs{display:flex;gap:8px;flex-wrap:wrap;margin-bottom:0}.round-tabs button{padding:12px 24px;background:transparent;border:1px solid var(--line);border-bottom:0;border-radius:6px 6px 0 0;font-size:15px;color:var(--muted)}.round-tabs button[aria-selected=true]{background:var(--light);color:var(--blue);border-color:#bdcfea}.round-content{border:1px solid var(--line);border-radius:0 8px 8px 8px;padding:32px}.round-top{display:flex;justify-content:space-between;align-items:center;margin-bottom:20px}.round-top h3{font-size:26px;margin:0}.round-summary{max-width:830px;font-size:18px}.round-facts{display:grid;grid-template-columns:1fr 1fr;gap:28px;margin:26px 0}.round-facts>div{border-left:2px solid var(--line);padding-left:18px}.round-facts h4{font-size:15px;margin:0 0 8px}.round-facts p{font-size:15px;color:var(--muted);margin:0}details{border-top:1px solid var(--line);padding:16px 0}summary{cursor:pointer;font-size:15px;font-weight:500}pre{white-space:pre-wrap;overflow-wrap:anywhere;background:#f6f8fb;padding:20px;font:13px/1.7 ui-monospace,monospace;max-height:500px;overflow:auto;margin-bottom:0}.prose{white-space:pre-wrap;font-size:15px;color:var(--muted);max-height:500px;overflow:auto;margin-top:18px}.trial-list{display:grid;gap:8px;margin:18px 0 0;padding-left:20px;font-size:14px;color:var(--muted)}.closing{display:grid;grid-template-columns:1.2fr 1fr;gap:80px}.closing h2{font-size:32px}.closing p{color:var(--muted);font-size:16px}.data-link{font-size:15px}footer{max-width:1180px;padding:28px 32px 50px;margin:auto;display:flex;justify-content:space-between;gap:20px;font-size:13px;color:var(--muted)}footer a{color:var(--muted)}@media(max-width:850px){.loop{padding:22px 20px 0}.loop-track{flex-direction:column;align-items:stretch}.step{min-height:0;display:grid;grid-template-columns:25px 1fr 85px;align-items:center;padding:15px;gap:10px}.step span,.step b{margin:0}.loop-track i{display:none}.return-path{margin-inline:20px}.return-path span{font-size:12px}.step-explanation{grid-template-columns:1fr;gap:10px;min-height:240px}.results-layout{gap:35px}.study-strip{gap:25px}.closing{gap:35px}.method-columns{gap:20px}}@media(max-width:620px){body{font-size:16px}header{padding:0 20px;height:70px}nav{gap:14px}nav a{font-size:13px}.wordmark{font-size:16px}main{padding:0 20px}.intro{padding-top:45px}h1{letter-spacing:-1px}h2{font-size:30px}.lead{font-size:18px}.study-strip{gap:15px;font-size:12px}.study-strip b{font-size:14px}.section-heading{gap:14px}.section-number{padding-top:4px}section{padding:48px 0}.method-columns,.results-layout,.closing,.round-facts{grid-template-columns:1fr;gap:25px}.rule{grid-template-columns:1fr;gap:6px;padding:16px}.run-status{align-items:flex-start;flex-direction:column;gap:10px}.round-content{padding:22px 18px}.round-top{gap:15px}.round-top h3{font-size:22px}.round-tabs button{padding:10px 15px}.return-path span{display:block;line-height:1.3;top:22px}.step-explanation{padding-top:38px}.bar-row{grid-template-columns:70px 1fr 65px;gap:8px}footer{padding-inline:20px;flex-wrap:wrap}footer>span:last-child{display:none}}@media(prefers-reduced-motion:reduce){html{scroll-behavior:auto}*{transition:none!important}}
/* An animated schematic of the editable harness and the fixed evaluation loop. */
.harness-demo{border:1px solid #cbd8ea;border-radius:12px;background:#fbfdff;overflow:hidden}.demo-toolbar{display:flex;justify-content:space-between;gap:20px;padding:23px 26px;background:#f1f6fd;border-bottom:1px solid var(--line);align-items:center}.demo-toolbar b{display:block;font-size:18px}.demo-toolbar span{display:block;font-size:14px;color:var(--muted);margin-top:3px}.demo-controls{display:flex;gap:7px;flex-shrink:0}.demo-controls button{border:1px solid #b8c9e1;background:white;color:var(--ink);padding:7px 12px;border-radius:5px;font-size:14px}.demo-controls button:first-child{background:var(--blue);border-color:var(--blue);color:white;min-width:65px}.demo-stages{display:flex;padding:17px 26px 0;gap:7px}.demo-stages button{border:0;border-bottom:2px solid transparent;background:transparent;color:var(--muted);font-size:14px;padding:7px 13px}.demo-stages button[aria-pressed=true]{color:var(--blue);border-color:var(--blue);font-weight:600}.demo-scene{position:relative;display:grid;grid-template-columns:24% 38% 25%;justify-content:space-between;padding:28px 26px 62px;min-height:475px;isolation:isolate}.demo-wires{position:absolute;inset:28px 26px 25px;width:calc(100% - 52px);height:calc(100% - 53px);z-index:-1;overflow:visible;color:#9cb2d0}.wire{fill:none;stroke:#b1c2d9;stroke-width:1.5;marker-end:url(#wire-arrow)}.travel{fill:none;stroke:var(--blue);stroke-width:3;stroke-dasharray:6 120;opacity:0}.harness-demo[data-phase="1"] .travel-edit,.harness-demo[data-phase="2"] .travel-check,.harness-demo[data-phase="3"] .travel-test,.harness-demo[data-phase="4"] .travel-return{opacity:1}.is-playing .travel{animation:flow-dash 2.5s linear infinite}@keyframes flow-dash{to{stroke-dashoffset:-126}}.component-stack h3{font-size:17px;margin-bottom:1px}.component-stack>p{font-size:13px;color:var(--muted);margin-bottom:13px}.component-options{display:grid;gap:7px}.component-options button{border:1px solid var(--line);border-radius:5px;background:white;text-align:left;padding:9px 11px;color:var(--ink)}.component-options b{font-size:14px;display:block}.component-options span{font-size:12px;display:block;color:var(--muted)}.component-options button[aria-pressed=true]{border-color:var(--blue);background:#eaf1ff;box-shadow:inset 3px 0 var(--blue)}.fixed-core{margin-top:14px;border:1px dashed #afbdce;padding:10px;border-radius:5px;background:#f2f4f7}.fixed-core b{font-size:13px;display:block}.fixed-core span{font-size:12px;color:var(--muted);display:block}.edit-station{background:white;border:1px solid #cbd8ea;border-radius:9px;padding:20px;align-self:start;box-shadow:0 5px 20px #1e478009;transition:border-color .3s,box-shadow .3s}.station-label{display:flex;justify-content:space-between;gap:10px;font-size:13px;color:var(--muted);margin-bottom:18px;align-items:center}.example-kind{font-size:12px;color:var(--green);background:#e9f5ef;padding:3px 6px;border-radius:3px}.example-kind.illustrative{color:#6a5590;background:#f1edf8}.edit-station h3{font-size:21px;margin-bottom:10px}.edit-station>p{font-size:14px;color:var(--muted);line-height:1.55}.edit-before,.edit-after{padding:10px 12px;border-radius:4px;font-size:14px;margin-top:12px}.edit-before{background:#f2f4f7}.edit-after{background:#ecf5f0;border-left:3px solid #44957a;transition:opacity .3s,transform .3s}.edit-before>span,.edit-after>span{font-size:12px;color:var(--muted);display:block;margin-bottom:4px}.edit-before p,.edit-after p{margin:0;font-size:14px;line-height:1.5}.edit-station .edit-file{font:12px/1.6 ui-monospace,monospace;margin:12px 0;overflow-wrap:anywhere}.proposal-status{font-size:13px;color:var(--blue);padding-top:12px;border-top:1px solid var(--line);line-height:1.5;min-height:52px}.harness-demo[data-phase="0"] .edit-after{opacity:.25;transform:translateY(5px)}.harness-demo[data-phase="1"] .edit-station{border-color:var(--blue);box-shadow:0 0 0 3px #265ece0c}.review-stations{display:flex;flex-direction:column;justify-content:space-between;gap:20px;padding-top:28px;padding-bottom:10px}.review-node{padding:15px;border:1px solid #cbd8ea;background:white;border-radius:7px;transition:border-color .3s,background .3s}.review-node>span{font-size:12px;color:var(--muted);display:block;margin-bottom:5px}.review-node b{font-size:15px;display:block;line-height:1.4}.review-node p{font-size:13px;color:var(--muted);line-height:1.45;margin:7px 0 0}.harness-demo[data-phase="2"] .critic-node,.harness-demo[data-phase="3"] .test-node,.harness-demo[data-phase="4"] .gate-node{border-color:var(--blue);background:#eef4ff}.trial-dots{display:flex;gap:6px;margin-top:13px}.trial-dots i{width:13px;height:13px;border:1px solid #aebfd8;border-radius:3px;background:#f0f4fa}.harness-demo[data-phase="3"] .trial-dots i{border-color:var(--blue);background:#d8e5ff}.harness-demo.is-playing[data-phase="3"] .trial-dots i{animation:trial-pulse 1.8s ease-in-out infinite}.trial-dots i:nth-child(2){animation-delay:.15s!important}.trial-dots i:nth-child(3){animation-delay:.3s!important}.trial-dots i:nth-child(4){animation-delay:.45s!important}.trial-dots i:nth-child(5){animation-delay:.6s!important}.trial-dots i:nth-child(6){animation-delay:.75s!important}@keyframes trial-pulse{50%{background:var(--blue)}}.feedback-note{position:absolute;bottom:22px;left:32%;padding:2px 16px;background:#fbfdff;font-size:12px;text-align:center}.feedback-note span{display:block;color:var(--muted)}.feedback-note b{color:var(--blue);font-weight:500}.demo-caption{display:grid;grid-template-columns:55px 1fr;gap:18px;background:#f1f6fd;border-top:1px solid var(--line);padding:22px 26px;min-height:137px}.demo-caption>span{color:var(--blue);font-size:15px;padding-top:2px}.demo-caption h3{font-size:20px;margin-bottom:6px}.demo-caption p{font-size:15px;color:var(--muted);margin:0;max-width:840px}.demo-disclaimer{font-size:12px;color:var(--muted);padding:14px 26px;margin:0;line-height:1.6}@media(max-width:950px){.demo-scene{grid-template-columns:25% 39% 27%;padding-inline:20px}.demo-toolbar{align-items:flex-start}.demo-toolbar span{max-width:400px}.demo-wires{opacity:.5}.edit-station{padding:14px}.station-label{flex-wrap:wrap;gap:4px}.component-options span{display:none}.review-node{padding:11px}.feedback-note{left:28%}.demo-controls button{padding:7px 9px}}@media(max-width:700px){.demo-toolbar{display:block;padding:20px}.demo-controls{margin-top:15px}.demo-stages{padding:12px 12px 0;gap:0;justify-content:space-between}.demo-stages button{font-size:12px;padding:8px}.demo-scene{display:flex;flex-direction:column;gap:24px;padding:20px;min-height:0}.demo-wires{display:none}.component-stack>p{margin-bottom:10px}.component-options{display:flex;flex-wrap:wrap;gap:6px}.component-options button{padding:7px 10px;flex:1 1 auto}.component-options b{font-size:13px}.fixed-core{display:flex;gap:10px;align-items:center}.fixed-core span{font-size:12px}.edit-station{width:100%;padding:20px}.station-label{flex-wrap:nowrap}.review-stations{padding:0;display:grid;grid-template-columns:repeat(3,1fr);gap:8px}.review-node b{font-size:13px}.review-node p{font-size:12px}.trial-dots{gap:3px;flex-wrap:wrap}.trial-dots i{width:10px;height:10px}.feedback-note{position:static;align-self:center;border-bottom:1px solid #b1c2d9;padding-bottom:8px}.demo-caption{padding:20px;grid-template-columns:35px 1fr;gap:10px;min-height:180px}.demo-disclaimer{padding:14px 20px}.edit-before p,.edit-after p{font-size:15px}}@media(prefers-reduced-motion:reduce){.harness-demo *{animation:none!important;transition:none!important}}

.github-link{display:inline-flex;align-items:center;gap:7px;color:var(--ink);white-space:nowrap}.github-link svg{flex-shrink:0}@media(max-width:620px){nav{gap:12px}.github-link span{display:none}.github-link svg{width:18px;height:18px}}
.bar-fill.muted{background:#9aa9bb}.notes{font-size:15px;color:var(--muted);margin:28px 0 0;padding-left:20px}.notes li{margin:6px 0}.round-facts h4{font-size:15px}