.ed-lab{max-width:1500px;margin:auto;padding:3rem 2rem 7rem}.ed-breadcrumbs{display:flex;gap:.6rem;align-items:center;color:#6f849c;font-size:.65rem}.ed-breadcrumbs a{color:#8fb9ed}.ed-hero{display:grid;grid-template-columns:minmax(0,1fr) 280px;gap:3rem;align-items:end;padding:4.5rem 0 3rem;border-bottom:1px solid var(--line)}.ed-hero h1{max-width:950px;margin:.5rem 0 1rem;font:400 clamp(3.6rem,7vw,7rem)/.9 var(--serif)}.ed-hero>div>p:last-child{max-width:780px;color:#91a5bb;font-size:1.05rem;line-height:1.7}.ed-hero aside{display:grid;gap:.45rem;padding:1.3rem;border:1px solid #29415e;background:#09172a}.ed-hero aside span,.ed-hero aside small{color:#6f8dad;font-size:.6rem;text-transform:uppercase;letter-spacing:.1em}.ed-hero aside strong{font:400 1.6rem var(--serif);color:#f0f5fb}.ed-steps{display:grid;grid-template-columns:repeat(5,1fr);margin:2rem 0;padding:0;list-style:none;border:1px solid #263d58}.ed-steps li+li{border-left:1px solid #263d58}.ed-steps button{display:flex;width:100%;align-items:center;gap:.65rem;padding:.9rem;border:0;background:#081426;color:#8297ad;font:600 .63rem var(--sans);text-align:left;cursor:pointer}.ed-steps button span{display:grid;width:1.55rem;height:1.55rem;place-items:center;border:1px solid #395575;border-radius:50%;font-size:.55rem}.ed-steps button[aria-current=step]{background:linear-gradient(135deg,#2b8cff2e,#a855f714);color:#edf4fc}.ed-steps button[aria-current=step] span{border-color:#429bff;color:#71b4ff}.ed-workspace{display:grid;grid-template-columns:minmax(310px,420px) minmax(0,1fr);border:1px solid #29415e;background:#071324}.ed-instruction{padding:2rem;border-right:1px solid #29415e}.ed-instruction h2{margin:.5rem 0 1rem;font:400 2.2rem/1.05 var(--serif)}.ed-instruction>p:not(.eyebrow){color:#91a5bb;line-height:1.65}.ed-definition{display:grid;grid-template-columns:1fr auto 1fr;gap:.6rem;align-items:center;margin:1.5rem 0;padding:1rem;border:1px solid #2c4562;background:#09182b;color:#dbe8f7;font:500 .78rem var(--sans);text-align:center}.ed-definition b{color:#66819f;font-size:.55rem;text-transform:uppercase}.ed-controls{display:grid;gap:1.2rem}.ed-controls label{display:grid;gap:.55rem}.ed-controls label>span{display:flex;justify-content:space-between;gap:1rem}.ed-controls b{font-size:.68rem}.ed-controls output{color:#73b5ff;font:600 .68rem var(--mono,monospace)}.ed-controls input{width:100%;accent-color:#2b8cff}.ed-status{display:flex;gap:.8rem;align-items:flex-start;margin:1.5rem 0 0;padding:1rem;border-left:3px solid #516d8d;background:#0a1829}.ed-status>span{display:grid;flex:0 0 1.55rem;height:1.55rem;place-items:center;border:1px solid currentColor;border-radius:50%;color:#84a0be}.ed-status b{font-size:.68rem;color:#e8f0fa}.ed-status p{margin:.35rem 0 0;color:#8196ad;font-size:.62rem;line-height:1.5}.ed-status.success{border-color:#38c982;background:#1a84561a}.ed-status.success>span,.ed-status.success b{color:#6be0a6}.ed-status.failure{border-color:#ff725e;background:#a33a301a}.ed-status.failure>span,.ed-status.failure b{color:#ff8c7c}.ed-choice{margin-top:1.5rem;padding-top:1.4rem;border-top:1px solid #29415e}.ed-choice h3{font:400 1.25rem var(--serif)}.ed-choice>div{display:grid;grid-template-columns:1fr 1fr;gap:.45rem}.ed-choice button,.ed-stage-actions button{border:1px solid #355271;background:#0a192c;color:#cbd8e8;padding:.7rem;font:600 .62rem var(--sans);cursor:pointer}.ed-choice button:hover,.ed-stage-actions button:hover:not(:disabled){border-color:#338fff;color:#fff}.ed-choice p{min-height:2.8em;color:#91a5bb;font-size:.62rem;line-height:1.5}.ed-choice p.correct{color:#6be0a6}.ed-choice p.incorrect{color:#ff9b8e}.ed-stage-actions{display:flex;justify-content:space-between;gap:.6rem;margin-top:1.5rem}.ed-stage-actions button:disabled{opacity:.35;cursor:not-allowed}.ed-figure{min-width:0;margin:0;padding:1.5rem}.ed-figure figcaption{display:flex;justify-content:space-between;gap:1rem;align-items:start;margin-bottom:1rem}.ed-figure figcaption>div:first-child{display:grid;gap:.3rem}.ed-figure figcaption span{color:#6f8dad;font-size:.55rem;text-transform:uppercase;letter-spacing:.1em}.ed-figure figcaption strong{font:400 1.35rem var(--serif)}.ed-legend{display:flex;flex-wrap:wrap;gap:.8rem}.ed-legend span{display:flex;align-items:center;gap:.35rem;letter-spacing:.04em;text-transform:none}.ed-legend i{width:.8rem;height:.5rem}.ed-legend .epsilon{background:#a955f759}.ed-legend .delta{background:repeating-linear-gradient(45deg,rgba(43,140,255,.45),rgba(43,140,255,.45) 2px,transparent 2px,transparent 4px)}.ed-legend .point{border-radius:50%;background:#67d99f}.ed-figure svg{display:block;width:100%;height:auto;border:1px solid #29415e;background:#06101d}.ed-figure svg [data-grid] line{stroke:#1c3047;stroke-width:1}.ed-figure svg [data-axes] line{stroke:#607b99;stroke-width:1.4}.ed-figure svg text{fill:#7890aa;font:12px var(--sans)}.ed-figure svg .axis-title{fill:#a9bbce;font-size:13px}.ed-figure svg [data-epsilon-band]{fill:#a855f724}.ed-figure svg [data-delta-band]{fill:url(#ed-puncture);stroke:#2b8cff80}.ed-figure svg pattern line{stroke:#2b8cff38;stroke-width:3}.ed-figure svg [data-curve]{fill:none;stroke:#e7eef8;stroke-width:3}.ed-figure svg .epsilon-edge{stroke:#ba74ff;stroke-width:1.5}.ed-figure svg .delta-edge{stroke:#4ba0ff;stroke-width:1.5;stroke-dasharray:6 5}.ed-figure svg .limit-hole{fill:#06101d;stroke:#f0f5fb;stroke-width:3}.ed-figure svg .sample-neutral{fill:#75aff3}.ed-figure svg .sample-pass{fill:#48dc94;stroke:#071324;stroke-width:1}.ed-figure svg .sample-fail{fill:#ff715e;stroke:#071324;stroke-width:1}.ed-figure svg .constraint{stroke-width:2;stroke-dasharray:3 4}.ed-figure svg .constraint.left{stroke:#ff9a4f}.ed-figure svg .constraint.right{stroke:#66c7ff}.ed-readout{display:grid;grid-template-columns:1fr 1fr 1.25fr;margin-top:1rem;border:1px solid #29415e}.ed-readout>div{display:grid;gap:.35rem;padding:.8rem}.ed-readout>div+div{border-left:1px solid #29415e}.ed-readout span{color:#6f8dad;font-size:.52rem;text-transform:uppercase;letter-spacing:.1em}.ed-readout strong{display:flex;gap:.6rem;flex-wrap:wrap;color:#dbe7f5;font-size:.65rem}.ed-readout i{font-style:normal}.ed-takeaway{max-width:900px;margin:4rem auto 0;padding:2.5rem 0;border-top:1px solid var(--line)}.ed-takeaway h2{margin:.5rem 0 1rem;font:400 clamp(2rem,4vw,3.4rem)/1.05 var(--serif)}.ed-takeaway>p:not(.eyebrow){color:#91a5bb;line-height:1.7}.ed-takeaway a{display:inline-block;margin-top:1rem;color:#68afff}@media(max-width:1050px){.ed-workspace{grid-template-columns:1fr}.ed-instruction{border-right:0;border-bottom:1px solid #29415e}.ed-hero{grid-template-columns:1fr}.ed-hero aside{max-width:380px}.ed-readout{grid-template-columns:1fr 1fr}.ed-readout>div:nth-child(3){grid-column:1/-1;border-left:0;border-top:1px solid #29415e}}@media(max-width:720px){.ed-lab{padding:2rem 1rem 5rem}.ed-hero{padding:3rem 0 2rem}.ed-steps{grid-template-columns:1fr}.ed-steps li+li{border-left:0;border-top:1px solid #263d58}.ed-instruction,.ed-figure{padding:1rem}.ed-definition,.ed-readout{grid-template-columns:1fr}.ed-readout>div+div,.ed-readout>div:nth-child(3){grid-column:auto;border-left:0;border-top:1px solid #29415e}.ed-figure figcaption{display:grid}.ed-choice>div{grid-template-columns:1fr}.ed-stage-actions{display:grid;grid-template-columns:1fr 1fr}}@media(prefers-reduced-motion:reduce){.ed-lab *{scroll-behavior:auto!important}}.ed-lab [hidden]{display:none!important}@media(min-width:1051px){.ed-lab{padding:1rem 2rem 4rem}.ed-hero{grid-template-columns:minmax(0,1fr) 250px;gap:2rem;padding:1rem 0}.ed-hero h1{margin:.25rem 0 .45rem;font-size:clamp(2.4rem,4.2vw,4.4rem);line-height:.92}.ed-hero>div>p:last-child{margin:0;font-size:.85rem;line-height:1.45}.ed-hero aside{gap:.25rem;padding:.75rem 1rem}.ed-hero aside strong{font-size:1.25rem}.ed-steps{margin:.75rem 0}.ed-steps button{padding:.5rem .7rem}.ed-steps button span{width:1.25rem;height:1.25rem}.ed-workspace{grid-template-columns:minmax(285px,360px) minmax(0,1fr)}.ed-instruction{padding:1rem 1.25rem}.ed-instruction h2{margin:.25rem 0 .45rem;font-size:1.55rem}.ed-instruction>p:not(.eyebrow){margin:.35rem 0;font-size:.76rem;line-height:1.4}.ed-definition{margin:.7rem 0;padding:.6rem}.ed-controls{gap:.55rem}.ed-controls label{gap:.25rem}.ed-status{margin:.65rem 0 0;padding:.65rem}.ed-status p{margin:.2rem 0 0;line-height:1.35}.ed-choice{margin-top:.65rem;padding-top:.6rem}.ed-choice h3{margin:.2rem 0 .45rem;font-size:1rem}.ed-choice button,.ed-stage-actions button{padding:.45rem}.ed-choice p{min-height:1.8em;margin:.4rem 0}.ed-stage-actions{margin-top:.65rem}.ed-figure{display:grid;grid-template-rows:auto minmax(0,1fr) auto;padding:.8rem 1rem}.ed-figure figcaption{margin-bottom:.55rem}.ed-figure figcaption strong{font-size:1.05rem}.ed-figure svg{width:100%;height:min(44vh,430px)}.ed-readout{margin-top:.55rem}.ed-readout>div{padding:.5rem .6rem}.ed-takeaway{margin-top:2rem;padding:1.5rem 0}}@media(min-width:1051px)and (max-height:850px){.ed-breadcrumbs{display:none}.ed-lab{padding-top:.5rem}.ed-hero{padding:.55rem 0}.ed-hero h1{font-size:2.25rem}.ed-hero>div>p:last-child{font-size:.75rem;line-height:1.3}.ed-hero aside{padding:.45rem .75rem}.ed-instruction{padding:.65rem .9rem}.ed-instruction h2{font-size:1.35rem}.ed-definition{margin:.45rem 0;padding:.45rem}.ed-controls{gap:.35rem}.ed-status{margin:.45rem 0 0;padding:.5rem}.ed-choice{margin-top:.4rem;padding-top:.4rem}.ed-choice h3{font-size:.9rem}.ed-choice button{padding:.35rem}.ed-choice p{margin:.2rem 0;min-height:1.2em}.ed-figure svg{height:min(34vh,280px)}}.ed-figure svg [data-delta-band]{transition:fill .16s ease,stroke .16s ease}.ed-figure svg [data-delta-band].neighborhood-pass{fill:#38c9822e;stroke:#48dc94}.ed-figure svg [data-delta-band].neighborhood-fail{fill:#ff715e29;stroke:#ff715e}.ed-example-picker{display:grid;gap:.3rem;margin:.55rem 0}.ed-example-picker>b,.ed-example-picker label{font-size:.68rem}.ed-example-picker>div{display:grid;grid-template-columns:minmax(0,1fr) auto auto;gap:.4rem}.ed-example-picker select,.ed-example-picker button{min-width:0;border:1px solid #355271;background:#0a192c;color:#cbd8e8;padding:.45rem .55rem;font:600 .62rem var(--sans)}.ed-example-picker button{cursor:pointer}.ed-example-picker button:hover{border-color:#338fff;color:#fff}.ed-example-picker button[aria-pressed=true]{border-color:#38c982;color:#6be0a6}.ed-factor-inputs{display:grid!important;grid-template-columns:minmax(0,1fr) 5.5rem;gap:.55rem;align-items:center}.ed-challenge-copy{padding:.65rem .75rem;border-left:2px solid #4b9fff;background:#2b8cff0f;font-size:.66rem!important;line-height:1.5!important}.ed-challenge-copy strong{color:#dce9f8}.ed-factor-inputs input[type=number]{width:100%;border:1px solid #355271;background:#0a192c;color:#dbe8f7;padding:.35rem .45rem;font:600 .68rem var(--mono,monospace)}.ed-min-delta{border:1px solid #355271;background:#0a192c;color:#8fb9ed;padding:.45rem;font:600 .62rem var(--sans);cursor:pointer}.ed-min-delta:hover{border-color:#38c982;color:#6be0a6}.ed-figure-tools{display:grid;justify-items:end;gap:.45rem}.ed-figure-tools>button{border:1px solid #355271;background:#0a192c;color:#8fb9ed;padding:.35rem .65rem;font:600 .58rem var(--sans);text-transform:uppercase;letter-spacing:.08em;cursor:pointer}.ed-figure-tools>button:hover,.ed-figure-tools>button[aria-pressed=true]{border-color:#338fff;background:#2b8cff21;color:#fff}.ed-figure>.ed-choice{display:grid;grid-template-columns:max-content minmax(0,1fr);gap:.35rem .75rem;align-items:center;margin-top:.55rem;padding-top:.55rem}.ed-figure>.ed-choice h3{margin:0;font-size:.95rem}.ed-figure>.ed-choice>div{grid-template-columns:repeat(4,1fr)}.ed-figure>.ed-choice p{grid-column:1/-1;min-height:1.2em;margin:0}@media(min-width:1051px){.ed-workspace{margin-top:.75rem}}@media(min-width:1051px)and (max-height:850px){.ed-workspace{margin-top:.45rem}}@media(min-width:1051px)and (max-height:850px){.ed-hero{padding:.3rem 0}.ed-hero h1{font-size:2rem}.ed-example-picker{gap:.15rem;margin:.25rem 0}.ed-example-picker select,.ed-example-picker button{padding:.3rem .45rem}.ed-figure-tools{display:flex;align-items:center;gap:.65rem}.ed-figure-tools>button{padding:.25rem .5rem}.ed-instruction>p:not(.eyebrow){margin:.2rem 0;line-height:1.25}.ed-workspace{margin-top:.3rem}}@media(max-width:720px){.ed-example-picker>div{grid-template-columns:1fr 1fr}.ed-example-picker select{grid-column:1/-1}.ed-figure>.ed-choice{grid-template-columns:1fr}.ed-figure>.ed-choice>div{grid-template-columns:1fr 1fr}}