:root{--ink:#10243c;--muted:#56687b;--navy:#0b2139;--blue:#245fcf;--line:#dce4ea;--paper:#f5f7f8;--mint:#c5eadc}
*{box-sizing:border-box}
html{scroll-behavior:smooth}
body{margin:0;background:var(--paper);color:var(--ink);font:16px/1.55 Inter,ui-sans-serif,system-ui,-apple-system,BlinkMacSystemFont,"Segoe UI",sans-serif}
a{color:inherit}button{font:inherit;cursor:pointer}button:disabled{cursor:not-allowed;opacity:.45}
a:focus-visible,button:focus-visible{outline:3px solid #e6a449;outline-offset:4px}
.skip{position:absolute;left:1rem;top:-5rem;background:#fff;padding:.6rem;z-index:10}.skip:focus{top:1rem}
.topbar{background:#fff;border-bottom:1px solid var(--line);display:flex;justify-content:space-between;align-items:center;gap:1rem;padding:18px max(5vw,24px)}
.brand{text-decoration:none;font-weight:800;letter-spacing:.04em;font-size:18px}.brand span:last-child{font-size:10px;letter-spacing:.13em;margin-left:5px}.brand-symbol{color:var(--blue);font-size:23px}
.topbar nav{display:flex;gap:28px}.topbar nav a{font-size:13px;font-weight:650;text-decoration:none;color:#4b5e72}.topbar nav a:hover,footer a:hover{color:var(--blue)}
.intro{display:grid;grid-template-columns:minmax(0,1.8fr) minmax(290px,.8fr);background:var(--navy);color:#fff}
.intro-inner{padding:88px max(5vw,24px) 82px}
.eyebrow,.section-kicker,.aside-label,.card-top,.detail-top,.boundary-label{font-size:11px;letter-spacing:.17em;font-weight:800}
.eyebrow{color:#9bdac5;display:flex;align-items:center;gap:12px}.dot{width:8px;height:8px;border-radius:50%;background:#9bdac5;display:inline-block}.separator{color:#597288}
h1{font-size:clamp(44px,5.6vw,82px);letter-spacing:-.065em;line-height:1.04;max-width:920px;margin:25px 0}h1 em{font-style:normal;color:#9bdac5}
.lead{max-width:760px;font-size:clamp(17px,1.8vw,22px);color:#c4d3df;line-height:1.55}
.disclosure{margin:31px 0 28px;border-left:3px solid #9bdac5;padding:14px 20px;background:#ffffff0d;max-width:770px;color:#c9d7e0;font-size:14px}.disclosure strong{color:#fff}
.start{background:#d1eade;color:#12352d;text-decoration:none;font-weight:800;display:inline-flex;align-items:center;gap:24px;padding:15px 20px;border-radius:5px;font-size:14px}.start:hover{background:#fff}
.intro-aside{background:#102a45;border-left:1px solid #ffffff20;padding:88px 42px 48px;display:flex;flex-direction:column}
.aside-label{color:#83b9bd}.result-mark{font-size:clamp(80px,9vw,140px);font-weight:700;letter-spacing:-.1em;line-height:1.1;margin-top:38px}.result-mark span{font-size:32px;color:#7690a9;letter-spacing:-.04em}
.aside-rule{height:1px;background:#49617a;margin:20px 0 30px}.aside-title{font-size:23px;line-height:1.25;font-weight:650;max-width:250px;margin:0 0 42px}
.aside-metric{border-top:1px solid #ffffff24;padding:16px 0;display:flex;justify-content:space-between;gap:8px;font-size:12px}.aside-metric span{color:#a9bacb}.aside-metric b{font-size:11px;color:#9bdac5;text-align:right}
.work-area,.record-section{max-width:1360px;margin:auto;padding:82px max(5vw,24px)}
.section-kicker{display:flex;justify-content:space-between;color:#236181;border-bottom:1px solid var(--line);padding-bottom:16px}
.work-heading{display:flex;justify-content:space-between;align-items:end;gap:24px;margin:28px 0 32px}.work-heading h2,.record-section h2{font-size:clamp(30px,3vw,47px);letter-spacing:-.045em;line-height:1.1;margin:0 0 12px}.work-heading p,.section-lede{margin:0;color:var(--muted)}.record-tag{font-size:11px;color:#51677d;border:1px solid var(--line);padding:10px 12px;white-space:nowrap}
.workspace{display:grid;grid-template-columns:330px 1fr;border:1px solid var(--line);background:#fff;min-height:460px;box-shadow:0 18px 45px #0b213909}
.steps{border-right:1px solid var(--line);padding:20px 0;background:#f9fbfb}
.step{border:0;border-left:3px solid transparent;background:none;display:grid;grid-template-columns:32px 1fr;gap:14px;text-align:left;width:100%;padding:18px 18px 18px 22px;color:#475d72}
.step:hover{background:#e9f2f0}.step.active{border-left-color:#267c69;background:#e7f4ed;color:var(--ink)}.step-number{font-size:12px;font-weight:800;color:#397967}.step b{display:block;font-size:16px}.step small{font-size:12px;color:#657688}.step-state{grid-column:2;font-size:9px;letter-spacing:.1em;color:#638476;font-weight:800}
.detail{padding:38px clamp(24px,4vw,58px);display:flex;flex-direction:column}.detail-top{display:flex;justify-content:space-between;gap:10px;color:#3d6877}.verified-chip{color:#25765f;letter-spacing:.08em}.detail h3{font-size:clamp(25px,2.8vw,36px);letter-spacing:-.035em;line-height:1.18;margin:26px 0 12px}.detail>p{color:var(--muted);max-width:650px;margin:0}
.facts{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:12px;margin:28px 0}.fact{border:1px solid var(--line);padding:15px 17px;min-width:0}.fact span{font-size:10px;letter-spacing:.12em;text-transform:uppercase;font-weight:750;color:#567088;display:block}.fact b{display:block;font-size:14px;margin-top:6px;overflow-wrap:anywhere}
.interpretation{border-top:1px solid var(--line);padding-top:22px;margin-top:auto}.interpretation span{color:#297965;letter-spacing:.15em;font-size:10px;font-weight:800}.interpretation p{margin:5px 0 0;color:#445568;font-size:14px}
.detail-controls{display:flex;align-items:center;justify-content:space-between;gap:16px;margin-top:25px}.detail-controls button,.json-actions button{border:1px solid #9db1c3;background:#fff;color:var(--ink);border-radius:4px;padding:9px 13px;font-size:13px;font-weight:700}.detail-controls button:hover:not(:disabled),.json-actions button:hover{border-color:var(--blue);color:var(--blue)}#next{background:var(--navy);color:#fff;border-color:var(--navy)}#step-counter{font-size:11px;font-weight:800;letter-spacing:.12em;color:#718394}
.record-section{padding-top:30px}.record-section h2{margin:26px 0 15px}.section-lede{max-width:800px}.record-grid{display:grid;grid-template-columns:1fr 1fr;gap:18px;margin-top:30px}.record-card{background:#fff;border:1px solid var(--line);padding:27px;min-width:0}.card-top{display:flex;justify-content:space-between;gap:10px;color:#436789}.tiny-status{color:#20725f}.record-card h3{font-size:22px;letter-spacing:-.03em;margin:24px 0 7px}.record-card p{color:var(--muted);margin:0 0 20px}.record-card dl{margin:0;border-top:1px solid var(--line)}.record-card dt{font-size:11px;color:#678096;font-weight:750;margin:15px 0 4px}.record-card dd{margin:0;font-size:13px;font-weight:650}.hash,code{overflow-wrap:anywhere;font-family:ui-monospace,SFMono-Regular,Consolas,monospace}.hash{color:#22569c}.json-card{grid-column:1/-1;background:#0d243b;color:#fff;border-color:#0d243b}.json-card .card-top{color:#98b6c6}.json-card h3{margin-bottom:10px}.json-actions{display:flex;align-items:center;gap:15px;font-size:12px;color:#a2dbbc}.json-card pre{font-size:12px;line-height:1.6;overflow:auto;background:#142f4a;padding:22px;border:1px solid #ffffff15;max-height:380px;color:#d9e7f4}
.boundary{display:flex;align-items:center;justify-content:space-between;gap:32px;background:#e5efe9;border-left:4px solid #367a62;padding:30px 34px;margin-top:25px}.boundary-label{color:#26745b}.boundary h3{font-size:22px;margin:10px 0}.boundary p{font-size:14px;color:#435c57;max-width:820px;margin:0}.boundary a{white-space:nowrap;text-decoration:none;font-weight:800;font-size:13px;color:#194e49;border-bottom:1px solid;padding-bottom:5px}
.source-note{font-size:12px;color:#6c7b86;margin-top:22px;line-height:1.8}.source-note code{color:#425c70}
footer{display:flex;justify-content:space-between;gap:15px;padding:28px max(5vw,24px);background:var(--navy);color:#b4c5d3;font-size:11px;font-weight:750;letter-spacing:.1em}footer a{text-decoration:none;color:#fff}.footer-separator{color:#6b8aa2;margin:0 8px}
@media(max-width:900px){.intro{grid-template-columns:1fr}.intro-inner{padding:64px 30px}.intro-aside{padding:30px;display:grid;grid-template-columns:repeat(3,1fr);gap:12px}.aside-label,.aside-title,.aside-rule,.result-mark{display:none}.aside-metric{display:block}.aside-metric b{display:block;text-align:left;margin-top:7px}.workspace{grid-template-columns:1fr}.steps{border-right:0;border-bottom:1px solid var(--line);display:flex;overflow:auto;padding:0}.step{flex:0 0 180px;padding:14px;grid-template-columns:25px 1fr;gap:6px}.step-state{display:none}.work-heading{align-items:start;flex-direction:column}}
@media(max-width:630px){.topbar{align-items:start}.topbar nav{gap:12px;flex-wrap:wrap;justify-content:end}.topbar nav a{font-size:11px}.brand span:last-child{display:none}.intro-aside{display:none}.eyebrow{font-size:10px}.work-area,.record-section{padding:55px 20px}.record-tag{white-space:normal}.facts,.record-grid{grid-template-columns:1fr}.json-card{grid-column:auto}.detail{padding:26px 20px}.detail-top{flex-direction:column}.boundary{display:block;padding:24px}.boundary a{display:inline-block;margin-top:22px;white-space:normal}footer{flex-direction:column}}
@media(prefers-reduced-motion:reduce){html{scroll-behavior:auto}}