:root{color-scheme:light;--ink:#173128;--muted:#52665e;--accent:#b1ed6e;--paper:#f3f6ee;--line:#d7e0d7;--white:#fff;--display:"Avenir Next","Trebuchet MS",sans-serif;--body:-apple-system,BlinkMacSystemFont,"Segoe UI",sans-serif;--data:ui-monospace,"SFMono-Regular",Consolas,monospace}
*{box-sizing:border-box}html{scroll-behavior:smooth;scroll-padding-top:24px}body{margin:0;color:var(--ink);background:var(--paper);font:17px/1.65 var(--body)}a{color:var(--ink);text-underline-offset:4px;text-decoration-thickness:1px}a:hover{text-decoration-thickness:2px}a:focus-visible,summary:focus-visible{outline:3px solid var(--ink);outline-offset:5px;border-radius:3px}.skip{position:absolute;left:16px;top:-100px;padding:10px 16px;background:var(--white);z-index:10}.skip:focus{top:12px}.wrap{width:min(1080px,100%);margin:0 auto;padding:26px 28px 60px}.topline{display:flex;align-items:center;justify-content:space-between;gap:20px;padding-bottom:18px;border-bottom:1px solid var(--line)}.wordmark{font-family:var(--display);font-weight:750;letter-spacing:-.025em;font-size:25px}.topline nav{display:flex;gap:22px;font-size:14px}.eyebrow{font-size:13px;letter-spacing:.08em;text-transform:uppercase;color:var(--muted);margin:0 0 14px}.hero{padding:48px 0 34px}h1{font:700 clamp(35px,5.6vw,62px)/1.08 var(--display);letter-spacing:-.045em;max-width:890px;margin:0 0 24px}h2{font:700 clamp(25px,3.4vw,34px)/1.2 var(--display);letter-spacing:-.025em;margin:0 0 18px}h3{font:700 21px/1.3 var(--display);margin:0 0 12px}p{margin:12px 0}.lead{font-size:22px;line-height:1.5;max-width:790px}.muted{color:var(--muted)}.small{font-size:14px}.actions{display:flex;align-items:center;flex-wrap:wrap;gap:12px;margin:24px 0 14px}.button{display:inline-block;min-height:48px;padding:12px 18px;border:1px solid var(--ink);border-radius:10px;text-decoration:none;font-weight:650;background:var(--accent)}.button.secondary{background:var(--white);border-color:var(--line)}.button:hover{box-shadow:0 3px 0 var(--ink);transform:translateY(-1px)}.time-ledger{margin:32px 0 0;border:1px solid var(--line);border-radius:14px;background:var(--white);padding:20px;max-width:830px}.time-ledger figcaption{font-weight:650;margin-bottom:14px}.time-row{display:grid;grid-template-columns:150px 1fr;gap:12px;align-items:stretch;margin:10px 0}.time-row .label{font-size:14px;align-self:center}.time-track{display:flex;gap:3px}.time-part{display:flex;align-items:center;justify-content:center;flex:1;padding:9px 12px;min-height:46px;background:var(--paper);border:1px solid var(--line);font-size:14px;text-align:center}.time-part.review{background:var(--accent);border-color:var(--accent)}.time-ledger .small{margin-bottom:0}.section{background:var(--white);border:1px solid var(--line);border-radius:18px;margin:22px 0;padding:30px}.section-heading{display:flex;align-items:start;gap:15px}.step-number{flex:none;width:39px;height:39px;display:grid;place-items:center;font:700 17px var(--data);background:var(--accent);border-radius:50%;margin-top:1px}.input-grid{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:18px}.input-item{padding:18px;background:var(--paper);border-radius:10px}.input-item h3{font-size:18px;overflow-wrap:anywhere}.input-item p{font-size:15px}.input-item code{display:block;font-size:13px;overflow-wrap:anywhere;margin-top:12px}ol,ul{padding-left:25px;margin:12px 0}li{padding-left:3px;margin:9px 0}code{font-family:var(--data);font-size:.88em;overflow-wrap:anywhere}pre{margin:18px 0 0;padding:20px;border:1px solid var(--line);border-radius:10px;white-space:pre-wrap;overflow-wrap:anywhere;font:14px/1.65 var(--data);background:var(--paper)}details{border-top:1px solid var(--line);padding-top:18px;margin-top:22px}summary{cursor:pointer;font-weight:650;min-height:44px;padding:7px 0;line-height:1.5}details[open] summary{margin-bottom:14px}.check-grid{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:18px}.check-item{border-left:3px solid var(--accent);padding-left:17px}.check-item h3{font-size:19px}.check-item p{font-size:15px}.notice{border:1px solid var(--line);border-left:5px solid var(--ink);padding:17px 20px;background:var(--paper);border-radius:0 10px 10px 0;margin:20px 0}.outputs{font-family:var(--data);font-size:14px;list-style:none;padding:0}.outputs li{padding:8px 12px;border-bottom:1px solid var(--line)}.formulae{border-collapse:collapse;width:100%;font-size:15px;table-layout:fixed}.formulae th,.formulae td{text-align:left;border-bottom:1px solid var(--line);padding:13px 8px;vertical-align:top;overflow-wrap:anywhere}.formulae th:first-child{width:30%}.formulae caption{text-align:left;font-weight:650;margin:12px 0}.help{display:flex;align-items:center;justify-content:space-between;gap:20px}.help p{max-width:720px}.footer{font-size:14px;color:var(--muted);border-top:1px solid var(--line);padding-top:20px;margin-top:32px}.footer-links{display:flex;gap:18px;flex-wrap:wrap;margin-top:12px}
@media(max-width:700px){.wrap{padding:18px 18px 40px}.topline{align-items:start;gap:12px}.topline nav{gap:12px;flex-wrap:wrap;justify-content:flex-end}.hero{padding:34px 0 22px}.lead{font-size:19px}.section{padding:23px 19px}.input-grid,.check-grid{grid-template-columns:1fr}.input-grid{gap:12px}.time-row{grid-template-columns:1fr;gap:6px}.time-row .label{font-weight:650}.time-ledger{padding:17px}.help{display:block}.section-heading{gap:11px}.step-number{width:34px;height:34px}.formulae th:first-child{width:34%}pre{padding:15px;font-size:13px}}
@media(max-width:380px){.wrap{padding:16px 14px 34px}.topline{display:block}.topline nav{justify-content:start;margin-top:12px}.section{padding:20px 15px}.time-part{padding:8px 6px;font-size:13px}.actions .button{width:100%;text-align:center}.button{padding:12px 14px}}
@media(prefers-reduced-motion:reduce){html{scroll-behavior:auto}.button:hover{transform:none}}