*{box-sizing:border-box}
html{scroll-behavior:smooth}
body.behavior-lab-page{margin:0;background:#f7f3ea;color:#172824;font-family:'DM Sans',Arial,sans-serif}
.skip-link{position:absolute;left:12px;top:-60px;z-index:200;background:#174b40;color:#fff;padding:10px 14px}
.skip-link:focus{top:8px}
.lab-shell{max-width:1160px;margin:0 auto;padding:108px 32px 100px}
.back-link{display:inline-block;margin-bottom:32px;color:#174b40;font-size:13px;font-weight:700;text-decoration:none;border-bottom:1px solid currentColor}
.lab-intro{display:grid;grid-template-columns:minmax(0,1fr) minmax(260px,.6fr);gap:50px;align-items:end;border-bottom:1px solid #c9cec4;padding-bottom:42px}
.lab-kicker,.section-number,.question-label,.response-tag{color:#ba5538;text-transform:uppercase;letter-spacing:.14em;font-size:11px;font-weight:800;margin:0 0 16px}
.lab-intro h1{font-family:'Literata',Georgia,serif;font-weight:500;letter-spacing:-.055em;font-size:clamp(40px,5vw,68px);line-height:1.08;max-width:730px;margin:0 0 20px}
.lab-lede{font-size:17px;line-height:1.65;color:#52605b;max-width:650px;margin:0}
.lab-diagram{display:flex;align-items:center;justify-content:center;padding:38px 18px;min-height:172px;border:1px solid #c9cec4;background:#eeeae0;transform:rotate(-2deg)}
.lab-diagram>span:not(.diagram-line){font-size:11px;font-weight:800;text-align:center;line-height:1.5;padding:12px 8px;background:#fffcf5;border:1px solid #819389;white-space:nowrap}
.lab-diagram .diagram-control{border-color:#174b40!important;color:#174b40;transform:rotate(2deg)}
.diagram-control b{font-size:14px;letter-spacing:1px}
.diagram-line{height:1px;background:#819389;flex:1;min-width:12px}
.lab-note{border-left:3px solid #ba5538;background:#eeeae0;color:#52605b;padding:15px 18px;margin:28px 0 64px;line-height:1.6;font-size:13px}
.lab-note strong{color:#172824;margin-right:8px}
.workspace-head{display:flex;justify-content:space-between;align-items:end;gap:20px;margin-bottom:28px}
.workspace-head h2,.learning-section h2{font:500 clamp(28px,3vw,40px)/1.15 'Literata',Georgia,serif;letter-spacing:-.04em;margin:0}
.section-number{margin-bottom:8px}
.reset-button{border:1px solid #819389;background:transparent;color:#174b40;font:700 12px 'DM Sans',Arial,sans-serif;padding:10px 14px;cursor:pointer;min-height:44px}
.reset-button:hover{background:#d8e9d8}
.question-label{color:#52605b;margin:0 0 8px}
.question{font:500 clamp(21px,2.4vw,29px)/1.35 'Literata',Georgia,serif;letter-spacing:-.025em;margin:0 0 34px;padding:0 0 0 20px;border-left:3px solid #ba5538}
.lab-grid{display:grid;grid-template-columns:minmax(300px,.85fr) minmax(0,1.15fr);gap:24px;align-items:start}
.controls,.comparison{border:1px solid #c9cec4;background:#fffcf5}
.controls{padding:0 26px}
.control{padding:23px 0;border-bottom:1px solid #c9cec4}
.control:last-child{border-bottom:0}
.control-heading{display:flex;justify-content:space-between;align-items:baseline;gap:10px}
.control label{font-size:15px;font-weight:800;line-height:1.3}
.control output{font-size:12px;font-weight:800;color:#174b40;white-space:nowrap}
.control p{color:#52605b;font-size:12px;line-height:1.5;margin:6px 0 13px}
.control input[type=range]{width:100%;height:28px;margin:0;cursor:pointer;accent-color:#174b40}
.range-ends{display:flex;justify-content:space-between;color:#52605b;font-size:11px;font-weight:700}
.comparison{padding:24px;display:grid;gap:14px}
.response{padding:22px;border:1px solid #c9cec4;min-height:155px}
.response-before{background:#f0ede4}
.response-after{background:#fffdf8;border-color:#174b40;border-left:4px solid #174b40}
.response-tag{margin:0 0 8px;font-size:10px}
.response-after .response-tag{color:#174b40}
.response h3{font-size:14px;font-weight:800;margin:0 0 12px}
.response p:not(.response-tag),#sample-response p{font-size:13px;line-height:1.65;color:#36443f;margin:0 0 9px}
#sample-response p:last-child{margin-bottom:0}
.sample-caption{font-size:11px;color:#52605b;margin:0}
.instruction-section{margin-top:78px;padding-top:28px;border-top:2px solid #174b40}
.instruction-section>p{color:#52605b;line-height:1.6;margin:0 0 18px}
#instruction-output{display:block;width:100%;min-height:235px;resize:vertical;padding:20px;border:1px solid #819389;background:#fffcf5;color:#172824;font:13px/1.65 ui-monospace,SFMono-Regular,Menlo,monospace}
.instruction-actions{display:flex;align-items:center;gap:14px;margin-top:14px;min-height:44px}
.copy-button{border:1px solid #174b40;background:#174b40;color:#fff;font:800 13px 'DM Sans',Arial,sans-serif;padding:12px 18px;min-height:44px;cursor:pointer}
.copy-button:hover{background:#10392f}
#copy-status{font-size:12px;color:#174b40;font-weight:700}
.learning-section{margin-top:80px;border-top:1px solid #c9cec4;padding-top:28px}
.learning-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:28px;margin:28px 0 40px}
.learning-grid>div{border-top:2px solid #174b40;padding-top:13px}
.learning-grid span{color:#ba5538;font-weight:800;font-size:11px}
.learning-grid h3{font-size:16px;margin:12px 0 8px}
.learning-grid p,.lab-credit{color:#52605b;font-size:13px;line-height:1.65;margin:0}
.lab-credit{padding-top:22px;border-top:1px solid #c9cec4}
.lab-credit a{color:#174b40;font-weight:700}
@media(max-width:850px){.lab-intro{grid-template-columns:1fr}.lab-diagram{max-width:520px}.lab-grid{grid-template-columns:1fr}.learning-grid{gap:16px}}
@media(max-width:620px){.lab-shell{padding:92px 18px 70px}.lab-intro{gap:24px;padding-bottom:30px}.lab-diagram{min-height:120px;padding:20px 10px}.lab-diagram>span:not(.diagram-line){font-size:9px;padding:8px 5px}.lab-note{margin-bottom:48px}.workspace-head{align-items:start}.controls{padding:0 20px}.comparison{padding:15px}.learning-grid{grid-template-columns:1fr;gap:24px}.instruction-section,.learning-section{margin-top:60px}}
@media(prefers-reduced-motion:reduce){html{scroll-behavior:auto}}