:root{color-scheme:dark;--bg:#0b0e15;--panel:#121722;--line:#252c3b;--muted:#8793aa;--blue:#6e9cff;--violet:#a38bff;--green:#57e2af}*{box-sizing:border-box}body{margin:0;background:var(--bg);color:#eaf0ff;font:14px system-ui,-apple-system,sans-serif}button,input,select{font:inherit}button,select,input{border:1px solid var(--line);border-radius:8px;color:inherit;background:#1b2231;padding:9px 12px}button{cursor:pointer;transition:background .15s,transform .15s}button:hover{background:#303c54}button:disabled{opacity:.45;cursor:not-allowed}button.primary{background:#779dff;color:#09122b;border:0;font-weight:700}button.active{background:#263d69;color:#bad0ff}a{color:var(--blue);text-decoration:none}aside{position:fixed;inset:0 auto 0 0;width:218px;background:#10141e;border-right:1px solid var(--line);padding:32px 20px;display:flex;flex-direction:column}.brand{display:flex;gap:12px;align-items:center;font-size:34px;color:white;font-weight:700;margin-bottom:55px}.brand small{display:block;font-size:9px;letter-spacing:2px;color:var(--muted);margin-top:4px}.accent{color:var(--violet)}.eyebrow{font-size:10px;letter-spacing:2px;font-weight:600;color:var(--muted)}nav{margin-top:16px;display:grid;gap:7px}nav button{text-align:left;background:transparent;border-color:transparent;padding:12px}nav button.active{background:#1e2a43;border-color:#344768}.aside-bottom{margin-top:auto;font-size:12px;line-height:1.8;color:var(--muted)}.aside-bottom a{display:block;margin:18px 0}.dot{display:inline-block;width:7px;height:7px;border-radius:50%;background:var(--green);margin-right:6px}main{margin-left:218px;max-width:1720px;padding:38px 38px 0}header{display:flex;align-items:center;justify-content:space-between;margin-bottom:35px}h1{font-size:32px;letter-spacing:-1px;margin:8px 0}h2{margin:0 0 5px;font-size:23px}h3{font-size:14px;margin:0}p{color:var(--muted);line-height:1.6}.badge{font-size:10px;letter-spacing:.7px;border:1px solid var(--line);padding:7px 10px;border-radius:6px;color:var(--green)}.toolbar{display:flex;gap:18px;justify-content:space-between;align-items:center}.toolbar span{color:var(--muted);font-size:12px}.controls{display:flex;align-items:center;flex-wrap:wrap;gap:8px}.controls select{max-width:180px}.metrics{display:grid;grid-template-columns:repeat(4,1fr);gap:14px;margin:23px 0}.metrics article{background:linear-gradient(130deg,#192234,#121722);border:1px solid var(--line);border-radius:12px;padding:20px}.metrics span{font-size:10px;letter-spacing:1px;color:var(--muted)}.metrics strong{display:block;font-size:32px;font-weight:600;margin:9px 0}.metrics small{font-size:11px;color:var(--muted)}.workspace{display:grid;grid-template-columns:minmax(0,2.1fr) minmax(280px,1fr);gap:18px;margin-bottom:18px}.panel{border:1px solid var(--line);background:var(--panel);border-radius:12px;overflow:hidden;margin-bottom:18px}.workspace .panel{margin-bottom:0}.panel-head{display:flex;gap:12px;align-items:center;justify-content:space-between;padding:18px 20px;border-bottom:1px solid var(--line)}.tabs{display:flex;gap:4px}.tabs button{font-size:11px;padding:6px 10px}.canvas-wrap{position:relative;background:radial-gradient(ellipse at center,#18223a,#0e1320)}canvas#game{width:100%;height:auto;display:block}#empty{position:absolute;inset:0;display:flex;align-items:center;justify-content:center;flex-direction:column;text-align:center}#empty[hidden]{display:none}#empty span{font-size:52px;color:var(--violet);margin-bottom:15px}footer{padding:12px 18px;display:flex;align-items:center;justify-content:space-between;color:var(--muted);font-size:11px}input[type=range]{width:85px;padding:0;vertical-align:middle}.mind p,.mind details{margin:18px 20px;font-size:12px}.action-values{margin:20px;max-height:250px;overflow:auto}.action-row{display:flex;position:relative;justify-content:space-between;border-radius:6px;padding:10px;margin:7px 0;background:#1b2538;overflow:hidden}.action-row.chosen{outline:1px solid var(--violet)}.action-row span{position:relative;z-index:1}.value-bar{position:absolute;inset:0 auto 0 0;background:#345080;opacity:.6}.mini-metrics{margin:18px 20px;display:grid;gap:12px;color:var(--muted);font-size:12px}.mini-metrics b{float:right;color:#eaf0ff}pre{white-space:pre-wrap;overflow-wrap:anywhere;font-size:11px;line-height:1.7;color:#a8bbdb}#chart{width:100%;height:220px;padding:12px}.muted{color:var(--muted);font-size:11px}#chart-note{padding:0 20px}.form-grid{display:grid;grid-template-columns:1fr 1fr;gap:14px;padding:18px}.form-grid label{font-size:11px;color:var(--muted);display:grid;gap:8px}.form-grid input,.form-grid select{width:100%}.configuration p{margin:0 18px 20px}.checkpoint-list{padding:18px;max-height:240px;overflow:auto;color:var(--muted)}.checkpoint{display:flex;gap:12px;align-items:center;padding:12px;border-bottom:1px solid var(--line);font-size:12px}.checkpoint b{color:#dee7ff}.library-controls{padding:0 18px 18px}.library-controls input{width:75px}#evaluation{padding:20px;background:#0d1320;margin:0}.panel>.controls,.panel>#instructions{margin:18px}#error{background:#482333;color:#ffc2cf;padding:16px;border:1px solid #91475f;border-radius:8px;margin-bottom:16px}#human-actions{max-height:180px;overflow:auto}.page-footer{padding:22px 0;letter-spacing:1px}button:focus-visible,a:focus-visible{outline:2px solid var(--violet);outline-offset:3px}@media(max-width:1150px){main{padding:25px 20px}.toolbar{align-items:flex-start;flex-direction:column}.workspace{grid-template-columns:minmax(0,1.7fr) minmax(250px,1fr)}aside{width:180px;padding:25px 14px}main{margin-left:180px}}@media(max-width:850px){aside{position:static;width:100%;padding:16px}.brand{margin-bottom:16px;font-size:26px}nav{display:flex;overflow:auto}nav button{white-space:nowrap}.aside-bottom,aside>.eyebrow{display:none}main{margin:0;padding:22px 14px}.workspace{grid-template-columns:1fr}.metrics{grid-template-columns:repeat(2,1fr)}header h1{font-size:25px}.badge{font-size:9px}.panel-head{padding:15px}footer{flex-wrap:wrap;gap:10px}}
#explain{margin:0 20px}#explanation{padding:0 20px;max-height:240px;overflow:auto}.configuration details{margin:0 18px 18px;font-size:12px;color:var(--muted)}
#evaluation{overflow:auto}table{width:100%;border-collapse:collapse;text-align:left;font-size:12px}th{color:var(--muted);font-weight:500}td,th{padding:12px 8px;border-bottom:1px solid var(--line)}
/* Remote sign-in sits above the existing local laboratory interface. */
.remote-auth{position:fixed;inset:0;z-index:1000;background:#0d121af5;display:grid;place-items:center;padding:20px}
.remote-auth[hidden]{display:none}
.remote-auth form{width:min(100%,420px);padding:32px;border:1px solid #31514b;border-radius:18px;background:#17232e;box-shadow:0 24px 80px #0008;display:grid;gap:13px}
.remote-auth h2{font-size:27px;margin:0}
.remote-auth p{color:#afc2cc;line-height:1.5;margin:0 0 8px}
.remote-auth label{font-size:12px;color:#a7bdc5}
.remote-auth input{font:inherit;padding:12px;border-radius:8px;border:1px solid #45616a;background:#0e1820;color:#fff}
.remote-auth button{font:inherit;cursor:pointer}
.remote-auth button:disabled{opacity:.5;cursor:wait}
.remote-mark{font-size:36px;color:#8ae7d1}