:root{--paper:#f6f8fa;--ink:#263c4b;--private:#cf3517;--public:#2563a6;--permit:#226950;--muted:#576979;--line:#d6e0e7;--warning:#915100}
body{background:var(--paper);color:var(--ink);font-family:var(--font-display);font-size:15px;line-height:1.6}a{color:var(--public)}button,textarea{font:inherit}button{cursor:pointer}button:disabled{cursor:wait;opacity:.55}a:focus-visible,button:focus-visible,textarea:focus-visible,summary:focus-visible{outline:3px solid var(--public);outline-offset:4px}code,pre,textarea,.sample-key{font-family:var(--font-mono)}code{font-size:.88em}main,.lab-header,footer{max-width:1440px;margin:auto;padding-left:40px;padding-right:40px}.lab-header{height:88px;display:flex;align-items:center;justify-content:space-between;border-bottom:1px solid var(--line);gap:20px}.lab-header>a:last-child{font-size:13px}.brand{display:flex;align-items:center;gap:10px;font-weight:750;text-decoration:none;color:var(--ink)}.brand span{color:var(--muted);font-weight:400;margin-left:8px}.intro{display:flex;align-items:center;justify-content:space-between;gap:70px;padding:64px 0 50px}.intro h1{font-size:clamp(48px,5.6vw,82px);line-height:1.02;letter-spacing:-.055em;font-weight:800;margin:0 0 22px}.lead{font-size:21px;line-height:1.5}.intro-note{max-width:370px;border-left:3px solid var(--private);padding:8px 0 8px 24px}.intro-note p{font-size:14px;color:var(--muted);margin-top:14px}.sample-key{display:inline-block;color:var(--private);font-size:20px;letter-spacing:.045em}.workspace{display:grid;grid-template-columns:218px minmax(0,1fr) 290px;background:white;border:1px solid var(--line);border-radius:16px;overflow:hidden}.attempts{padding:26px 18px;background:#edf2f5}.attempts h2,.experiment h2{font-size:16px;font-weight:700;line-height:1.4}.attempts>p{font-size:12px;color:var(--muted);margin:10px 0 22px}.scenario-list{display:flex;flex-direction:column;gap:6px}.scenario{background:none;border:1px solid transparent;text-align:left;padding:12px 10px;color:var(--ink);border-radius:7px;font-size:13px;line-height:1.4;display:flex;align-items:center;gap:10px;width:100%}.scenario::before{content:"";width:7px;height:7px;border:1px solid #7b8e9d;border-radius:50%;flex:none}.scenario:hover{background:#e1e9ef}.scenario[aria-pressed=true]{background:white;border-color:var(--line);font-weight:700}.scenario[data-checked=true]::before{background:var(--public);border-color:var(--public)}.scenario:nth-child(6){margin-top:18px}.progress{margin-top:30px;font-size:11px;color:var(--muted)}.progress-track{height:3px;background:#d4e0e8;margin-top:10px}.progress-track>div{height:100%;background:var(--public);width:0;transition:width .2s}.experiment{padding:26px;min-width:0}.experiment-heading{display:flex;justify-content:space-between;align-items:flex-start;gap:16px}.experiment-heading p{font-size:12px;color:var(--muted);margin-top:6px}.quiet{border:0;background:none;color:var(--public);font-size:12px;padding:5px;white-space:nowrap}.quiet:hover{text-decoration:underline}.flow{display:grid;grid-template-columns:1fr 95px 1fr;gap:6px;align-items:center;margin:27px 0;background:#f7f9fb;padding:20px 12px;border-radius:8px;text-align:center}.flow>div{min-width:0}.flow strong{display:block;font-size:11px;margin:4px 0}.flow code{font-size:10px;white-space:nowrap}.flow-label{font-size:11px;color:var(--muted)}.flow>div:first-child code{color:var(--private)}.flow>div:last-child code{color:var(--public)}.boundary{position:relative;display:flex;flex-direction:column;align-items:center;gap:6px;font-size:9px}.boundary:before{content:"";position:absolute;top:22px;left:-10px;right:-10px;height:1px;background:#b8c7d3}.boundary>span:first-child{z-index:1;background:#fff;border:2px solid #b8c7d3;border-radius:50%;height:44px;width:44px;display:grid;place-items:center;font-size:23px;font-weight:700}.flow[data-state=blocked] .boundary>span:first-child{border-color:var(--private);color:var(--private)}.flow[data-state=allowed] .boundary>span:first-child{border-color:var(--warning);color:var(--warning)}.editor-heading{display:flex;justify-content:space-between;gap:10px;margin-bottom:10px;font-size:11px}.editor-heading label{font-weight:650}.editor-heading span{color:var(--muted)}textarea{width:100%;height:340px;resize:vertical;background:#f9fbfc;border:1px solid var(--line);border-radius:6px;padding:18px 14px;color:#243c4d;font-size:12px;line-height:1.8;tab-size:2;white-space:pre;overflow:auto}.run-row{display:flex;align-items:center;gap:12px;flex-wrap:wrap;margin-top:14px}.primary{background:var(--private);color:#fff;border:0;border-radius:6px;padding:12px 18px;font-weight:700;font-size:13px}.primary:hover:not(:disabled){background:#ad2c12}.run-row>span{font-size:10px;color:var(--muted)}.run-row>.quiet{margin-left:auto}.runtime{font-size:10px;color:var(--muted);margin-top:12px}.verdict{border-left:1px solid var(--line);padding:30px 24px;background:#fcfdfe;min-width:0}.verdict-mark{width:62px;height:62px;display:grid;place-items:center;border-radius:50%;background:#e9eff4;color:#647789;font-size:34px;margin-bottom:23px}.verdict[data-status=blocked] .verdict-mark{background:#fbe9e5;color:var(--private)}.verdict[data-status=allowed] .verdict-mark{background:#fff1d9;color:var(--warning)}.verdict h2{font-size:25px;line-height:1.2;letter-spacing:-.025em;margin-bottom:15px}.verdict p{font-size:13px;color:var(--muted);line-height:1.7}.explanation{border-top:1px solid var(--line);padding-top:18px;margin-top:20px;font-size:13px}.verdict details{margin-top:24px;font-size:12px}.verdict pre{white-space:pre-wrap;overflow-wrap:anywhere;font-size:10px;line-height:1.7;margin-top:12px;color:var(--private)}.execution-note{border-top:1px solid var(--line);padding-top:18px;margin-top:28px;font-size:11px!important}.lessons{display:grid;grid-template-columns:repeat(3,1fr);gap:45px;margin:45px 0}.lessons h2{font-size:16px;line-height:1.45;margin-bottom:12px}.lessons p{font-size:13px;color:var(--muted)}.technical{max-width:850px;margin:0 0 40px;font-size:13px;color:var(--muted)}summary{cursor:pointer;color:var(--ink);font-weight:650}.technical p{margin:15px 0}footer{display:flex;justify-content:space-between;gap:20px;padding-top:26px;padding-bottom:30px;border-top:1px solid var(--line);font-size:12px;color:var(--muted)}[hidden]{display:none!important}
@media(min-width:1450px){.workspace{grid-template-columns:230px minmax(0,1fr) 310px}textarea{font-size:13px}}
@media(max-width:1100px){main,.lab-header,footer{padding-left:24px;padding-right:24px}.workspace{grid-template-columns:190px minmax(0,1fr)}.verdict{grid-column:1/-1;border-left:0;border-top:1px solid var(--line)}.verdict-mark{float:left;margin:0 22px 15px 0}.verdict details{clear:both}.intro{gap:30px}.intro-note{max-width:330px}}
@media(max-width:680px){main,.lab-header,footer{padding-left:18px;padding-right:18px}.lab-header{height:72px}.lab-header>a:last-child{font-size:10px;max-width:120px;text-align:right}.brand{font-size:14px}.brand span{display:none}.intro{display:block;padding:36px 0}.intro h1{font-size:58px}.lead{font-size:18px}.intro-note{margin-top:28px;max-width:none}.intro-note p{font-size:12px}.sample-key{font-size:17px}.workspace{display:block}.attempts{padding:20px}.scenario-list{display:grid;grid-template-columns:1fr 1fr;gap:5px}.scenario{font-size:11px;padding:9px 6px}.scenario:nth-child(6){margin-top:0}.attempts>p{margin:6px 0 12px}.progress{margin-top:16px}.experiment{padding:20px 14px}.experiment-heading{gap:8px}.experiment-heading h2{font-size:15px}.experiment-heading .quiet{font-size:10px}.flow{grid-template-columns:1fr 75px 1fr;padding:16px 5px}.flow code{font-size:9px}.flow strong{font-size:10px}.boundary{font-size:8px}textarea{font-size:11px;height:320px;padding:12px 10px}.editor-heading{font-size:10px}.run-row>span{display:none}.verdict{padding:26px 20px}.lessons{grid-template-columns:1fr;gap:25px;margin:32px 0}.lessons p{max-width:60ch}footer{flex-direction:column;gap:10px}}
@media(prefers-reduced-motion:reduce){*{scroll-behavior:auto!important;transition:none!important}}

/* Make the compiler itself visible, with evidence from each real worker response. */
.compiler-panel{border-top:3px solid var(--public);background:#eaf1f7;padding:24px 28px;margin:0 0 28px;border-radius:0 0 10px 10px}
.compiler-identity{display:flex;align-items:center;gap:16px}.compiler-identity img{flex:none}.compiler-identity h2{font-size:22px;line-height:1.25;margin:0 0 6px}.compiler-identity p{font-size:13px;color:var(--muted)}
.compiler-purpose{font-size:14px;max-width:85ch;margin:18px 0}.compiler-path{display:flex;align-items:center;flex-wrap:wrap;gap:14px;font-size:13px;margin-bottom:14px}.compiler-path code{font-size:13px}.compiler-path strong{color:var(--public)}.compiler-panel>a{font-size:12px}
.verdict-origin{font-weight:700;color:var(--public)!important;margin-bottom:16px}.compiler-receipt{font-size:12px!important;padding:12px 0;border-top:1px solid var(--line);color:var(--ink)!important}.verdict #compilerResponse{color:var(--ink)}
.runtime{font-size:12px}.editor-heading{font-size:12px}
@media(max-width:680px){.compiler-panel{padding:20px 16px}.compiler-identity{align-items:flex-start;gap:12px}.compiler-identity h2{font-size:19px}.compiler-purpose{font-size:13px}.compiler-path{gap:8px;font-size:11px}.compiler-path code{font-size:11px}.editor-heading{flex-wrap:wrap;font-size:11px}}