:root{--paper:#f5f7f8;--surface:#fff;--ink:#14202b;--graphite:#415160;--blue:#2457d6;--blue-soft:#eaf0ff;--teal:#147d73;--risk:#b83831;--line:#c9d2d9;--shadow:0 10px 30px rgba(20,32,43,.07)}
*{box-sizing:border-box}
html{color-scheme:light}
body{margin:0;background:var(--paper);color:var(--ink);font:16px/1.55 Inter,ui-sans-serif,-apple-system,BlinkMacSystemFont,"Segoe UI",sans-serif}
header,main,footer{max-width:1240px;margin:auto;padding:20px 28px}
header{display:flex;justify-content:space-between;align-items:center;border-bottom:1px solid var(--line)}
main{min-height:calc(100vh - 150px);padding-top:54px;padding-bottom:72px}
footer{border-top:1px solid var(--line);color:var(--graphite);font-size:13px}
nav{display:flex;gap:22px;align-items:center}
a{color:var(--blue);font-weight:680;text-underline-offset:3px}
.wordmark{color:var(--ink);font-weight:780;letter-spacing:-.02em;text-decoration:none}
h1,h2,h3{line-height:1.12;letter-spacing:-.035em;margin:0 0 18px}
h1{font-size:clamp(38px,6vw,70px);max-width:900px}
h2{font-size:clamp(26px,3vw,38px)}
h3{font-size:20px;margin-top:28px}
p{max-width:850px}
.lede{font-size:19px;color:var(--graphite);margin:0 0 36px}
.kicker{margin:0 0 10px;font:700 12px ui-monospace,SFMono-Regular,monospace;color:var(--blue);letter-spacing:.1em;text-transform:uppercase}
.muted,small{color:var(--graphite)}
section{margin-top:54px}
.ledger{overflow:auto;border:1px solid var(--line);background:var(--surface);box-shadow:var(--shadow)}
table{width:100%;border-collapse:collapse;background:var(--surface)}
th,td{padding:15px 16px;text-align:left;border-bottom:1px solid #dbe2e7;vertical-align:top}
th{font-size:11px;letter-spacing:.06em;text-transform:uppercase;color:var(--graphite)}
tbody tr:last-child td{border-bottom:0}
.linked-row{cursor:pointer}.linked-row:hover,.linked-row:focus{background:var(--blue-soft)}
.linked-row td:first-child{min-width:240px}.linked-row td:nth-child(3){min-width:330px}
.section-heading{display:flex;justify-content:space-between;align-items:end;gap:20px}
.chart-switch{display:flex;border:1px solid var(--line);background:var(--surface);padding:4px}
.chart-switch button{background:transparent;color:var(--graphite);border:0;padding:8px 12px}
.chart-switch button.active{background:var(--ink);color:#fff}
.plot{min-height:470px;background:var(--surface);border:1px solid var(--line);box-shadow:var(--shadow)}
.hidden{display:none!important}
.performance{margin-top:40px}
.comparison-strip{display:grid;grid-template-columns:1fr 1fr;gap:14px}.profile{padding:22px;background:var(--surface);border-top:6px solid var(--blue);box-shadow:var(--shadow)}.profile.teal{border-color:var(--teal)}.profile p{margin:0;color:var(--graphite);font-weight:700}.profile>strong{display:block;margin-top:8px;font-size:clamp(34px,4vw,54px);letter-spacing:-.05em}.profile>span{color:var(--graphite);font-size:13px}.profile dl{display:flex;gap:28px;margin:18px 0 0}.profile dt{color:var(--graphite);font-size:12px}.profile dd{margin:2px 0 0;font-size:20px;font-weight:750}.comparison-table th:first-child{min-width:240px}
.performance dl{display:grid;grid-template-columns:repeat(6,minmax(130px,1fr));border-block:2px solid var(--ink);margin:0;padding:16px 0}
.performance div{padding:4px 18px;border-right:1px solid var(--line)}.performance div:last-child{border:0}
.performance dt{display:flex;align-items:center;gap:5px;color:var(--graphite);font-size:11px;letter-spacing:.05em;text-transform:uppercase}
.performance dd{margin:4px 0 0;font-weight:780;font-size:22px}
.metric-help{position:relative;display:inline-block;margin:0;border:0;background:transparent;font-size:12px;letter-spacing:normal;text-transform:none}
.metric-help summary{display:grid;place-items:center;width:17px;height:17px;padding:0;border:1px solid currentColor;border-radius:50%;cursor:help;font:700 11px/1 ui-sans-serif,sans-serif;list-style:none}
.metric-help summary::-webkit-details-marker{display:none}
.metric-help p{position:absolute;z-index:2;top:calc(100% + 8px);left:50%;display:none;width:min(270px,calc(100vw - 48px));margin:0;padding:10px 12px;transform:translateX(-50%);background:var(--ink);color:#fff;font:13px/1.4 Inter,ui-sans-serif,sans-serif;letter-spacing:normal;text-transform:none;box-shadow:var(--shadow)}
.metric-help[open] p{display:block}
.metric-help summary:focus-visible{outline:3px solid var(--teal);outline-offset:3px}
.sr-only{position:absolute;width:1px;height:1px;padding:0;margin:-1px;overflow:hidden;clip:rect(0,0,0,0);white-space:nowrap;border:0}
@media(hover:hover){.metric-help:not([open]):hover p{display:block}}
.method-table{max-width:720px}.method-table th{width:38%}
.pipeline{padding:0;list-style:none;counter-reset:step;max-width:900px}
.pipeline li{counter-increment:step;display:grid;grid-template-columns:34px 1fr;padding:12px 0;border-bottom:1px solid var(--line)}
.pipeline li:before{content:counter(step,decimal-leading-zero);font:700 12px ui-monospace,monospace;color:var(--blue);grid-row:1/3}
.pipeline span{display:block;color:var(--graphite);font-size:13px}
.provenance{display:grid;grid-template-columns:repeat(2,minmax(220px,1fr));gap:1px;background:var(--line);border:1px solid var(--line);max-width:900px}
.provenance div{background:var(--surface);padding:12px}.provenance dt{color:var(--graphite);font-size:12px}.provenance dd{margin:3px 0 0;overflow-wrap:anywhere}
form{display:grid;gap:14px;max-width:480px}
label{display:grid;gap:6px;font-weight:650}
input,select,button{font:inherit;padding:10px 12px;border:1px solid var(--graphite);background:var(--surface);color:var(--ink)}
button{cursor:pointer;color:#fff;background:var(--blue);border-color:var(--blue);font-weight:700;width:max-content}
button.secondary{color:var(--risk);background:transparent;border-color:var(--risk)}
nav form{display:block}nav button{background:none;color:var(--blue);padding:0;border:0;text-decoration:underline}
.inline-actions{display:flex;gap:8px;flex-wrap:wrap}.inline-actions form{display:block}
.auth-panel{max-width:560px;padding:38px;background:var(--surface);border-top:5px solid var(--blue);box-shadow:var(--shadow)}
.auth-panel h1{font-size:44px}
pre{overflow:auto;background:#e8edf0;color:#17212b;padding:16px;margin:10px 0 0;tab-size:2}
code{font:13px/1.5 ui-monospace,SFMono-Regular,Consolas,monospace}
details{border:1px solid var(--line);margin:10px 0;background:var(--surface)}
summary{cursor:pointer;padding:12px 14px;font-weight:700;color:var(--blue)}
.setup-link{padding:14px;border-left:5px solid var(--teal);background:#e7f3f1;overflow-wrap:anywhere}
.error{color:var(--risk);font-weight:750}
:focus-visible{outline:3px solid var(--teal);outline-offset:3px}
@media(prefers-reduced-motion:reduce){*{scroll-behavior:auto!important;transition:none!important}}
@media(max-width:900px){.performance dl{grid-template-columns:repeat(3,1fr)}.performance div:nth-child(3){border:0}.performance div:nth-child(-n+3){border-bottom:1px solid var(--line)}}
@media(max-width:700px){header,.section-heading{display:block}nav{margin-top:12px;flex-wrap:wrap}main{padding-top:36px}.performance dl{display:block}.performance div{border:0!important;border-bottom:1px solid var(--line)!important;padding:10px}.comparison-strip{grid-template-columns:1fr}.provenance{grid-template-columns:1fr}.chart-switch{margin:18px 0;width:max-content}.plot{min-height:360px}.auth-panel{padding:24px}}