:root{color-scheme:dark;--bg:#111410;--panel:#1a1f17;--muted:#abb4a2;--line:#343e2d;--lime:#c4f46c;--ink:#f3f6ec;--gap:10px;font-family:Inter,ui-sans-serif,system-ui,-apple-system,BlinkMacSystemFont,"Segoe UI",sans-serif;background:var(--bg);color:var(--ink)}
*{box-sizing:border-box}body{margin:0;background:radial-gradient(ellipse at 78% 12%,#29351d66,transparent 45%),var(--bg)}a{color:inherit;text-underline-offset:4px}a:hover{color:var(--lime)}button,input{font:inherit}button{cursor:pointer;border:1px solid var(--line);border-radius:10px;background:#242c1e;color:var(--ink);min-height:44px;padding:11px 16px;font-weight:650;transition:background .16s,transform .16s,border-color .16s}button:hover:enabled{background:#35422a;border-color:#779257;transform:translateY(-1px)}button:active:enabled{transform:translateY(1px)}button:disabled{cursor:not-allowed;opacity:.4}button:focus-visible,a:focus-visible,input:focus-visible,.board:focus-visible{outline:3px solid var(--lime);outline-offset:4px}button.primary{background:var(--lime);color:#18210c;border-color:var(--lime)}button.primary:hover:enabled{background:#d6ff8b}button.quiet{background:transparent}.site-header,main,footer{max-width:1160px;margin:auto;padding-left:32px;padding-right:32px}.site-header{height:90px;display:flex;align-items:center;gap:30px;border-bottom:1px solid var(--line);font-size:13px}.brand{font-size:22px;letter-spacing:-1px;font-weight:800;text-decoration:none}.brand span{color:var(--lime);margin-left:6px}.experiment{margin-right:auto;letter-spacing:2px;font-size:10px;color:var(--muted)}.intro{display:flex;align-items:center;justify-content:space-between;padding:48px 0 35px;gap:30px}.eyebrow{font-size:11px;font-weight:650;letter-spacing:2px;color:var(--lime);display:flex;align-items:center;gap:9px}.live-dot{width:7px;height:7px;border-radius:50%;background:var(--lime);box-shadow:0 0 20px #c4f46c66}h1{font-size:clamp(38px,6vw,72px);line-height:1.05;letter-spacing:-3px;margin:16px 0}h1 span{color:var(--lime)}.dek{max-width:510px;font-size:16px;line-height:1.6;color:var(--muted);margin-bottom:0}.edition{text-align:right;font-family:ui-monospace,monospace;color:#94a180;font-size:15px;line-height:1.6}.edition strong{font-size:54px;letter-spacing:-4px;color:#455437}.play-layout{display:grid;grid-template-columns:minmax(0,1.2fr) minmax(300px,1fr);gap:30px;align-items:start}.game-panel,.control-panel{border:1px solid var(--line);border-radius:20px;background:linear-gradient(150deg,#20271b,#181e15);padding:24px}.scoreboard{display:flex;gap:25px;align-items:center;margin-bottom:22px}.scoreboard>div{display:flex;flex-direction:column;gap:4px}.scoreboard span{font-size:11px;text-transform:uppercase;letter-spacing:1px;color:var(--muted)}.scoreboard strong{font-size:25px;font-variant-numeric:tabular-nums;letter-spacing:-1px}.scoreboard button{margin-left:auto;font-size:12px;white-space:nowrap;padding:9px 12px}.scoreboard button span{font-size:17px;margin-left:7px}.board-wrap{position:relative}.board{position:relative;display:grid;grid-template-columns:repeat(4,1fr);gap:var(--gap);padding:var(--gap);aspect-ratio:1;background:#0e130c;border:1px solid #354329;border-radius:14px;touch-action:pan-y;isolation:isolate}.cell{aspect-ratio:1;border-radius:8px;background:#232c1e;box-shadow:inset 0 1px 1px #ffffff05}.tile{position:absolute;left:calc(var(--gap) + var(--col) * ((100% - var(--gap)) / 4));top:calc(var(--gap) + var(--row) * ((100% - var(--gap)) / 4));width:calc((100% - var(--gap) * 5) / 4);height:calc((100% - var(--gap) * 5) / 4);display:flex;align-items:center;justify-content:center;border-radius:8px;background:#dce7cc;color:#263321;font-weight:800;font-size:clamp(22px,3.5vw,39px);letter-spacing:-1.5px;box-shadow:0 3px 0 #0003,inset 0 1px 0 #fff4;z-index:1}.tile[data-value="4"]{background:#c4d6ad}.tile[data-value="8"]{background:#adc980}.tile[data-value="16"]{background:#8cbf58}.tile[data-value="32"]{background:#a5df4f}.tile[data-value="64"]{background:#c4f46c}.tile[data-value="128"]{background:#e1f68c}.tile[data-value="256"]{background:#f5e88b}.tile[data-value="512"]{background:#f8cc74}.tile[data-value="1024"]{background:#f6a46c;font-size:clamp(19px,2.7vw,30px)}.tile.high{background:#edfbba;box-shadow:0 0 26px #c4f46344;font-size:clamp(18px,2.7vw,30px)}.tile{will-change:transform}.board[data-phase="sliding"] .tile{z-index:2}.board-banner{position:absolute;bottom:18px;left:18px;right:18px;padding:13px 16px;border:1px solid var(--lime);border-radius:10px;background:#17200def;backdrop-filter:blur(8px);color:var(--lime);font-size:14px;font-weight:700;text-align:center;z-index:2;pointer-events:none}.board-bottom{display:flex;align-items:center;justify-content:space-between;gap:14px;margin-top:20px}.board-bottom p{font-size:12px;line-height:1.7;color:var(--muted);margin:0}.board-bottom strong{color:var(--ink)}.d-pad{display:grid;grid-template-columns:repeat(3,40px);gap:4px;flex-shrink:0}.d-pad button{padding:4px;min-height:38px;font-size:20px}.d-pad button:first-child{grid-column:2}.d-pad button:nth-child(2){grid-column:1}.local-note{font-size:11px;line-height:1.6;color:var(--muted);margin:20px 0 0;border-top:1px solid var(--line);padding-top:14px}.panel-heading{display:flex;align-items:center;gap:10px;justify-content:space-between}h2{font-size:18px;letter-spacing:-.5px;margin:0}.pill{font-family:ui-monospace,monospace;font-size:10px;letter-spacing:1px;background:#293520;color:var(--lime);border:1px solid #435631;border-radius:30px;padding:5px 9px;white-space:nowrap}.status{font-size:13px;line-height:1.5;color:var(--muted);min-height:39px;margin:14px 0 18px}.consent-box{padding:14px;border:1px solid var(--line);border-radius:10px;background:#10170d55}.consent-box label{display:flex;align-items:flex-start;gap:10px;font-size:12px;line-height:1.65;cursor:pointer}.consent-box input{accent-color:var(--lime);width:18px;height:18px;flex-shrink:0;margin:2px 0 0}.consent-box p{font-size:10px;line-height:1.6;color:var(--muted);margin:9px 0 0 28px}.ai-controls{display:grid;grid-template-columns:1fr auto;gap:8px;margin-top:16px}.step{grid-column:1/-1;display:flex;justify-content:space-between}.run-note,.small{font-size:11px;line-height:1.6;color:var(--muted)}.run-note{margin:10px 0 20px}.error{background:#3b2320;border:1px solid #915649;color:#ffd0c3;border-radius:8px;padding:12px;font-size:12px;line-height:1.5;overflow-wrap:anywhere}.decision{border-top:1px solid var(--line);padding-top:20px}.decision-heading{display:flex;justify-content:space-between;align-items:center}.decision-heading h3{font-size:13px;margin:0;font-weight:650}.decision-heading>span{font-size:14px;color:var(--lime);font-weight:700}.probabilities{display:grid;gap:10px;margin:19px 0}.prob-row{display:grid;grid-template-columns:57px 1fr 45px;gap:10px;align-items:center;font-size:11px;color:var(--muted)}.prob-track{height:6px;background:#343f2b;border-radius:8px;overflow:hidden}.prob-fill{height:100%;width:0;background:#6c8650;transition:width .3s;border-radius:8px}.prob-row.selected{color:var(--lime)}.prob-row.selected .prob-fill{background:var(--lime)}.prob-value{text-align:right;font-variant-numeric:tabular-nums}.telemetry{display:grid;grid-template-columns:1fr 1fr;gap:15px;margin:20px 0 10px}.telemetry dt{font-size:10px;color:var(--muted);margin-bottom:5px}.telemetry dd{font-size:19px;margin:0;font-variant-numeric:tabular-nums}.model-name{display:flex;justify-content:space-between;gap:10px;font-size:9px;letter-spacing:1px;color:var(--muted);margin:17px 0 0}.model-name code{font-size:10px;letter-spacing:0;color:#d0dbc3}.how-it-works{margin:46px 0 40px;border-top:1px solid var(--line);padding-top:25px}.how-it-works>div{display:grid;grid-template-columns:repeat(3,1fr);gap:30px}.how-it-works p{font-size:12px;line-height:1.8;color:var(--muted)}.how-it-works strong{display:block;color:var(--ink);font-weight:600;margin-bottom:4px}footer{border-top:1px solid var(--line);display:flex;justify-content:space-between;gap:30px;padding-top:22px;padding-bottom:30px;color:var(--muted);font-size:10px;line-height:1.8}footer>span{max-width:650px}.no-script{padding:20px;color:#ffcdac;text-align:center}[hidden]{display:none!important}@media(max-width:800px){.play-layout{grid-template-columns:1fr;max-width:560px;margin:auto}.control-panel{padding:24px}.tile{font-size:38px}.tile[data-value="1024"],.tile.high{font-size:30px}.intro{padding-top:32px}.edition{display:none}.how-it-works>div{grid-template-columns:1fr;gap:0}.how-it-works{max-width:560px;margin:32px auto}footer{flex-direction:column;gap:12px}}@media(max-width:450px){:root{--gap:7px}.site-header,main,footer{padding-left:18px;padding-right:18px}.site-header{height:72px;gap:16px}.experiment{font-size:8px;letter-spacing:1px}.brand{font-size:19px}h1{letter-spacing:-2px}.dek{font-size:14px}.game-panel,.control-panel{padding:15px;border-radius:15px}.scoreboard{gap:18px}.scoreboard strong{font-size:23px}.scoreboard span{font-size:9px}.scoreboard button{padding:7px;font-size:10px}.tile{font-size:29px}.tile[data-value="1024"],.tile.high{font-size:22px}.board-bottom{gap:7px}.board-bottom p{font-size:10px}.d-pad{grid-template-columns:repeat(3,36px)}.d-pad button{min-height:36px}.eyebrow{font-size:9px;letter-spacing:1.4px}}@media(prefers-reduced-motion:reduce){*,*::before,*::after{animation:none!important;transition:none!important;scroll-behavior:auto!important}}