/* artifact page defaults */
:root{color-scheme:light;box-sizing:border-box;padding-top:env(safe-area-inset-top,0px);padding-bottom:env(safe-area-inset-bottom,0px)}
html{scroll-padding-top:env(safe-area-inset-top,0px)}
body{margin:0;padding:0;font:14px -apple-system,BlinkMacSystemFont,sans-serif;background:#fff;color:#000}
img{max-width:100%}
[hidden]:not([hidden=until-found i]){display:none!important}

/* Layout: lab bench — 3D maze takes the stage, a relay-console panel sits to its right (stacks below on phones). Single committed dark "enamel console" look. */
:root{
  color-scheme: dark;
  --bg:#171c1b;          /* enamel green-black */
  --panel:#212827;
  --line:#34403d;
  --fg:#e7e3d7;
  --muted:#93a09a;
  --amber:#f3a93a;       /* relay lamp */
  --copper:#c77b47;      /* whiskers */
  --goal:#e8d36a;
  --wire:#5f6e69;        /* schematic wiring */
  --f-display:"Archivo Narrow", "Arial Narrow", "Helvetica Neue", Arial, sans-serif;
  --f-mono:"IBM Plex Mono", ui-monospace, "SFMono-Regular", Menlo, Consolas, monospace;
}
html,body{height:100%}
body{background:var(--bg);color:var(--fg);font-family:var(--f-display);font-size:15px;line-height:1.45;
  padding-left:max(16px, env(safe-area-inset-left, 0px));padding-right:max(16px, env(safe-area-inset-right, 0px));padding-block:16px;box-sizing:border-box}
*{box-sizing:border-box}
.wrap{max-width:1280px;margin:0 auto;display:grid;gap:14px}
header{display:flex;flex-wrap:wrap;align-items:baseline;justify-content:space-between;gap:6px 24px;border-bottom:1px solid var(--line);padding-bottom:10px}
h1{font-weight:700;font-size:clamp(28px,4vw,40px);letter-spacing:.02em;margin:0;text-wrap:balance;line-height:1}
h1 small{font-family:var(--f-mono);font-weight:400;font-size:12px;letter-spacing:.08em;color:var(--muted);margin-left:10px;text-transform:uppercase;vertical-align:middle}
header p{margin:0;color:var(--muted);max-width:62ch;font-size:14px}
main{display:grid;grid-template-columns:minmax(0,1fr) 320px;gap:14px}
@media (max-width:880px){main{grid-template-columns:minmax(0,1fr)}}
#stage{position:relative;min-width:0;height:min(76vh,740px);min-height:420px;border:1px solid var(--line);border-radius:6px;overflow:hidden;background:var(--panel)}
@media (max-width:880px){#stage{height:auto;aspect-ratio:1/1;min-height:0;max-width:100%}}
#stage canvas{display:block;width:100%;height:100%;touch-action:none}
.hint{position:absolute;left:10px;bottom:10px;font-family:var(--f-mono);font-size:11px;color:var(--muted);background:color-mix(in srgb,var(--bg) 78%,transparent);padding:5px 8px;border-radius:4px;pointer-events:none;max-width:calc(100% - 20px)}
aside{display:grid;gap:14px;align-content:start;min-width:0}
.card{background:var(--panel);border:1px solid var(--line);border-radius:6px;padding:14px;display:grid;gap:10px;min-width:0}
.label{font-family:var(--f-mono);font-size:11px;letter-spacing:.12em;text-transform:uppercase;color:var(--muted)}
.btns{display:grid;grid-template-columns:1fr 1fr;gap:8px}
button{font-family:var(--f-display);font-weight:600;font-size:14px;letter-spacing:.03em;color:var(--fg);background:transparent;border:1px solid var(--line);border-radius:4px;padding:9px 10px;cursor:pointer;text-align:left}
button:hover{border-color:var(--muted)}
button:focus-visible,input:focus-visible{outline:2px solid var(--amber);outline-offset:2px}
button.primary{background:var(--amber);color:#1d1508;border-color:var(--amber)}
button.primary:hover{filter:brightness(1.08)}
button .k{font-family:var(--f-mono);font-weight:500;font-size:11px;opacity:.7;margin-right:6px}
.seg{display:grid;grid-template-columns:1fr 1fr;border:1px solid var(--line);border-radius:4px;overflow:hidden}
.seg button{border:0;border-radius:0;text-align:center;padding:7px}
.seg button[aria-pressed="true"]{background:var(--line)}
.row{display:flex;align-items:center;gap:10px}
input[type=range]{flex:1;accent-color:var(--amber);min-width:0}
#status{font-family:var(--f-mono);font-size:13px;min-height:2.9em;color:var(--fg)}
#status b{color:var(--amber);font-weight:500}
.stats{display:grid;grid-template-columns:repeat(3,1fr);gap:8px}
.stat{display:grid;gap:2px}
.stat .v{font-family:var(--f-mono);font-size:22px;font-variant-numeric:tabular-nums;line-height:1.1}
.stat .l{font-size:12px;color:var(--muted);line-height:1.2}
.relays{display:grid;grid-template-columns:repeat(5,1fr);gap:6px;max-width:250px}
.lamp{aspect-ratio:1;border-radius:50%;border:1px solid var(--line);display:grid;place-items:center;font-family:var(--f-mono);font-size:15px;color:var(--muted);background:var(--bg);position:relative;transition:background .2s,color .2s,box-shadow .2s}
.lamp.set{color:#1d1508;background:color-mix(in srgb,var(--amber) 70%,var(--bg))}
.lamp.here{box-shadow:0 0 0 2px var(--fg)}
.lamp.goal::after{content:"";position:absolute;inset:-4px;border-radius:50%;border:1.5px dashed var(--goal)}
.legend{font-size:12.5px;color:var(--muted);margin:0}
.about p{margin:0;font-size:13.5px;color:var(--muted);max-width:62ch}
.about p strong{color:var(--fg);font-weight:600}