:root{--paper:#f6f4ee;--ink:#17191c;--blue:#2457d6;--copper:#d06a2d;--red:#e54832;--green:#7de38d;--line:rgba(23,25,28,.2);--muted:#666b72}*{box-sizing:border-box}html{scroll-behavior:smooth}body{margin:0;background:var(--paper);color:var(--ink);font-family:Outfit,ui-sans-serif,system-ui,sans-serif;line-height:1.35}button,input{font:inherit;letter-spacing:0}button{cursor:pointer}a{color:inherit}main{width:100%;max-width:100%;overflow-x:hidden}.nav{position:absolute;z-index:20;left:0;top:0;width:62%;height:58px;padding:0 26px;display:grid;grid-template-columns:1fr auto 1fr;align-items:center;border-bottom:1px solid rgba(255,255,255,.24);color:#fff;font-size:11px}.nav a:first-child{font-weight:850;text-transform:uppercase;text-decoration:none}.nav a:last-child{justify-self:end}.nav span{font:600 9px ui-monospace,monospace;color:rgba(255,255,255,.65)}.lab{min-height:100svh;display:grid;grid-template-columns:minmax(0,62%) minmax(410px,38%)}.world{position:relative;min-height:100svh;background:#17191c;overflow:hidden}.world canvas{position:absolute;inset:0;width:100%;height:100%;display:block}.world-copy{position:absolute;z-index:3;top:88px;left:26px;max-width:700px;color:#fff;pointer-events:none}.world-copy p,.reasoning-title p,.transfer>div>p{margin:0 0 10px;color:var(--green);font-size:10px;font-weight:850;text-transform:uppercase}.world-copy h1{max-width:720px;margin:0;font-size:clamp(42px,5vw,72px);line-height:.95;letter-spacing:0}.world-copy span{display:block;margin-top:16px;color:rgba(255,255,255,.68);font-size:14px}.world-legend{position:absolute;z-index:3;left:26px;right:26px;bottom:20px;display:flex;justify-content:space-between;color:rgba(255,255,255,.7);font:700 9px ui-monospace,monospace;text-transform:uppercase}.world-legend b{color:#fff}.rail{min-height:100svh;padding:24px 25px 18px;display:flex;flex-direction:column;justify-content:center;gap:12px;border-left:1px solid var(--line)}.challenge-head{display:flex;justify-content:space-between;gap:20px;align-items:start;padding-bottom:12px;border-bottom:1px solid var(--line)}.challenge-head strong,.challenge-head small{display:block}.challenge-head strong{font-size:18px}.challenge-head small{margin-top:3px;color:var(--muted);font-size:10px}.challenge-head button{padding:5px 0;border:0;border-bottom:1px solid;background:none;font-size:10px;font-weight:800}fieldset{min-width:0;margin:0;padding:0;border:0}legend,.inputs label{color:var(--muted);font-size:9px;font-weight:800;text-transform:uppercase}.predictions{display:grid;grid-template-columns:repeat(3,1fr);gap:5px;margin-top:6px}.predictions button{min-height:38px;padding:6px;border:1px solid var(--ink);background:transparent;font-size:9px;font-weight:750}.predictions button.active,.predictions button:hover,.predictions button:focus-visible{background:var(--ink);color:#fff}.inputs{display:grid;grid-template-columns:repeat(3,1fr);gap:8px}.inputs label{display:grid;gap:4px}.inputs input{width:100%;height:35px;border:1px solid var(--line);border-radius:0;background:#fff;padding:5px 7px;color:var(--ink);font-variant-numeric:tabular-nums}.metrics{display:grid;grid-template-columns:1fr 1fr;border-top:1px solid var(--ink);border-left:1px solid var(--ink)}.metrics>div{padding:8px;border-right:1px solid var(--ink);border-bottom:1px solid var(--ink)}.metrics span{display:block;color:var(--muted);font-size:9px;text-transform:uppercase}.metrics strong{display:block;margin-top:1px;font-size:20px;font-variant-numeric:tabular-nums}.actions{display:grid;grid-template-columns:1fr 42px 42px;gap:6px}.actions button,.transfer button{min-height:43px;border:1px solid var(--ink);background:transparent;color:var(--ink);font-weight:850}.actions .energize,.transfer button{background:var(--blue);border-color:var(--blue);color:#fff}.actions .energize:disabled{opacity:.35;cursor:not-allowed}.explanation{min-height:72px;display:grid;grid-template-columns:28px 1fr;gap:9px;padding-top:10px;border-top:1px solid var(--line)}.explanation b{width:25px;height:25px;display:grid;place-items:center;border-radius:50%;background:var(--copper);color:#fff}.explanation p{margin:0;font-size:11px;line-height:1.45}.target{margin:0;color:var(--muted);font-size:9px}.reasoning{min-height:150vh;padding:150px 7vw;display:grid;grid-template-columns:42% 58%;gap:8%;background:var(--ink);color:#fff}.reasoning-title{max-width:500px;align-self:start}.reasoning-title h2{margin:0;font-size:48px;line-height:1.02}.reasoning-flow{display:grid;gap:170px;padding-bottom:180px}.reasoning-flow article{display:grid;grid-template-columns:64px 1fr;gap:22px;max-width:620px}.reasoning-flow i{width:58px;height:58px;display:grid;place-items:center;border:1px solid var(--green);color:var(--green);font:700 26px Georgia,serif}.reasoning-flow h3{margin:0 0 10px;font-size:28px}.reasoning-flow p{margin:0;color:rgba(255,255,255,.68);font-size:16px;line-height:1.65}.transfer{min-height:78vh;display:grid;grid-template-columns:1fr 1fr;align-items:center;gap:8vw;padding:9vw;background:var(--copper);color:#fff}.transfer>div:first-child p{color:#fff}.transfer h2{max-width:720px;margin:0;font-size:50px;line-height:1}.transfer>div:last-child>p{font-size:17px;line-height:1.65}.transfer button{margin-top:22px;padding:0 18px;background:var(--ink);border-color:var(--ink)}footer{display:flex;justify-content:space-between;gap:30px;padding:32px 7vw;background:var(--ink);color:rgba(255,255,255,.7);font-size:11px}button:focus-visible,a:focus-visible,input:focus-visible{outline:3px solid var(--green);outline-offset:2px}@media(max-height:720px) and (min-width:801px){.rail{gap:7px;padding-top:16px;padding-bottom:10px}.world-copy{top:75px}.world-copy h1{font-size:54px}.inputs input{height:30px}.predictions button{min-height:32px}.metrics strong{font-size:16px}.explanation{min-height:55px}}@media(max-width:800px){.nav{width:100%;height:48px;padding:0 14px;grid-template-columns:1fr auto}.nav a:last-child{display:none}.nav span{font-size:7px}.lab{display:block}.world{height:40svh;min-height:40svh}.world-copy{top:62px;left:14px;max-width:calc(100% - 28px)}.world-copy p{font-size:8px}.world-copy h1{font-size:38px;max-width:560px}.world-copy span{display:none}.world-legend{left:14px;right:14px;bottom:8px;font-size:7px}.world-legend span:nth-child(2){display:none}.rail{min-height:60svh;padding:14px;gap:9px}.inputs{grid-template-columns:repeat(3,1fr)}.inputs input{height:39px}.predictions button{min-height:44px}.actions button{min-height:46px}.reasoning{min-height:auto;display:block;padding:100px 20px}.reasoning-title h2{font-size:38px}.reasoning-flow{gap:80px;padding:90px 0 0}.transfer{grid-template-columns:1fr;min-height:auto;padding:100px 20px}.transfer h2{font-size:40px}footer{display:block;padding:28px 20px}footer a{display:inline-block;margin-top:18px}}@media(max-width:430px){.world-copy h1{font-size:32px}.challenge-head strong{font-size:15px}.inputs{grid-template-columns:1fr 1fr}.metrics strong{font-size:17px}.explanation{min-height:64px}.explanation p{font-size:10px}}@media(prefers-reduced-motion:reduce){html{scroll-behavior:auto}*,*::before,*::after{animation-duration:.001ms!important;transition-duration:.001ms!important}}